diff --git a/src/main/scala/gitbucket/core/controller/ApiController.scala b/src/main/scala/gitbucket/core/controller/ApiController.scala
index 685a8b4..049f59b 100644
--- a/src/main/scala/gitbucket/core/controller/ApiController.scala
+++ b/src/main/scala/gitbucket/core/controller/ApiController.scala
@@ -1,29 +1,17 @@
 package gitbucket.core.controller
 
 import gitbucket.core.api._
-import gitbucket.core.model._
-import gitbucket.core.service.IssuesService.IssueSearchCondition
-import gitbucket.core.service.PullRequestService._
+import gitbucket.core.controller.api.{ApiOrganizationControllerBase, ApiRepositoryControllerBase, ApiUserControllerBase}
 import gitbucket.core.service._
-import gitbucket.core.util.Directory._
 import gitbucket.core.util.Implicits._
-import gitbucket.core.util.JGitUtil._
-import gitbucket.core.util.SyntaxSugars._
 import gitbucket.core.util._
 import gitbucket.core.plugin.PluginRegistry
-import gitbucket.core.servlet.Database
-import gitbucket.core.model.Profile.profile.blockingApi._
-import gitbucket.core.view.helpers.{isRenderable, renderMarkup}
-import org.eclipse.jgit.api.Git
-import org.eclipse.jgit.revwalk.RevWalk
-import org.scalatra.{Created, NoContent, UnprocessableEntity}
-
-import scala.collection.JavaConverters._
-import scala.concurrent.Await
-import scala.concurrent.duration.Duration
 
 class ApiController
     extends ApiControllerBase
+    with ApiOrganizationControllerBase
+    with ApiRepositoryControllerBase
+    with ApiUserControllerBase
     with RepositoryService
     with AccountService
     with ProtectedBranchService
@@ -50,25 +38,6 @@
     with WritableUsersAuthenticator
 
 trait ApiControllerBase extends ControllerBase {
-  self: RepositoryService
-    with AccountService
-    with ProtectedBranchService
-    with IssuesService
-    with LabelsService
-    with MilestonesService
-    with PullRequestService
-    with CommitsService
-    with CommitStatusService
-    with RepositoryCreationService
-    with IssueCreationService
-    with HandleCommentService
-    with PrioritiesService
-    with OwnerAuthenticator
-    with UsersAuthenticator
-    with GroupManagerAuthenticator
-    with ReferrerAuthenticator
-    with ReadableUsersAuthenticator
-    with WritableUsersAuthenticator =>
 
   /**
    * 404 for non-implemented api
@@ -76,6 +45,18 @@
   get("/api/v3/*") {
     NotFound()
   }
+  post("/api/v3/*") {
+    NotFound()
+  }
+  put("/api/v3/*") {
+    NotFound()
+  }
+  delete("/api/v3/*") {
+    NotFound()
+  }
+  patch("/api/v3/*") {
+    NotFound()
+  }
 
   /**
    * https://developer.github.com/v3/#root-endpoint
@@ -85,318 +66,6 @@
   }
 
   /**
-   * https://developer.github.com/v3/orgs/#get-an-organization
-   */
-  get("/api/v3/orgs/:groupName") {
-    getAccountByUserName(params("groupName")).filter(account => account.isGroupAccount).map { account =>
-      JsonFormat(ApiUser(account))
-    } getOrElse NotFound()
-  }
-
-  /**
-   * https://developer.github.com/v3/users/#get-a-single-user
-   * This API also returns group information (as GitHub).
-   */
-  get("/api/v3/users/:userName") {
-    getAccountByUserName(params("userName")).map { account =>
-      JsonFormat(ApiUser(account))
-    } getOrElse NotFound()
-  }
-
-  /**
-   * https://developer.github.com/v3/repos/#list-organization-repositories
-   */
-  get("/api/v3/orgs/:orgName/repos") {
-    JsonFormat(getVisibleRepositories(context.loginAccount, Some(params("orgName"))).map { r =>
-      ApiRepository(r, getAccountByUserName(r.owner).get)
-    })
-  }
-
-  /**
-   * https://developer.github.com/v3/repos/#list-user-repositories
-   */
-  get("/api/v3/users/:userName/repos") {
-    JsonFormat(getVisibleRepositories(context.loginAccount, Some(params("userName"))).map { r =>
-      ApiRepository(r, getAccountByUserName(r.owner).get)
-    })
-  }
-
-  /*
-   * https://developer.github.com/v3/repos/branches/#list-branches
-   */
-  get("/api/v3/repos/:owner/:repository/branches")(referrersOnly { repository =>
-    JsonFormat(
-      JGitUtil
-        .getBranches(
-          owner = repository.owner,
-          name = repository.name,
-          defaultBranch = repository.repository.defaultBranch,
-          origin = repository.repository.originUserName.isEmpty
-        )
-        .map { br =>
-          ApiBranchForList(br.name, ApiBranchCommit(br.commitId))
-        }
-    )
-  })
-
-  /**
-   * https://developer.github.com/v3/repos/branches/#get-branch
-   */
-  get("/api/v3/repos/:owner/:repository/branches/*")(referrersOnly { repository =>
-    //import gitbucket.core.api._
-    (for {
-      branch <- params.get("splat") if repository.branchList.contains(branch)
-      br <- getBranches(
-        repository.owner,
-        repository.name,
-        repository.repository.defaultBranch,
-        repository.repository.originUserName.isEmpty
-      ).find(_.name == branch)
-    } yield {
-      val protection = getProtectedBranchInfo(repository.owner, repository.name, branch)
-      JsonFormat(
-        ApiBranch(branch, ApiBranchCommit(br.commitId), ApiBranchProtection(protection))(RepositoryName(repository))
-      )
-    }) getOrElse NotFound()
-  })
-
-  /*
-   * https://developer.github.com/v3/repos/contents/#get-contents
-   */
-  get("/api/v3/repos/:owner/:repository/contents")(referrersOnly { repository =>
-    getContents(repository, ".", params.getOrElse("ref", repository.repository.defaultBranch))
-  })
-
-  /*
-   * https://developer.github.com/v3/repos/contents/#get-contents
-   */
-  get("/api/v3/repos/:owner/:repository/contents/*")(referrersOnly { repository =>
-    getContents(repository, multiParams("splat").head, params.getOrElse("ref", repository.repository.defaultBranch))
-  })
-
-  private def getContents(repository: RepositoryService.RepositoryInfo, path: String, refStr: String) = {
-    def getFileInfo(git: Git, revision: String, pathStr: String): Option[FileInfo] = {
-      val (dirName, fileName) = pathStr.lastIndexOf('/') match {
-        case -1 =>
-          (".", pathStr)
-        case n =>
-          (pathStr.take(n), pathStr.drop(n + 1))
-      }
-      getFileList(git, revision, dirName).find(f => f.name.equals(fileName))
-    }
-
-    using(Git.open(getRepositoryDir(params("owner"), params("repository")))) { git =>
-      val fileList = getFileList(git, refStr, path)
-      if (fileList.isEmpty) { // file or NotFound
-        getFileInfo(git, refStr, path)
-          .flatMap { f =>
-            val largeFile = params.get("large_file").exists(s => s.equals("true"))
-            val content = getContentFromId(git, f.id, largeFile)
-            request.getHeader("Accept") match {
-              case "application/vnd.github.v3.raw" => {
-                contentType = "application/vnd.github.v3.raw"
-                content
-              }
-              case "application/vnd.github.v3.html" if isRenderable(f.name) => {
-                contentType = "application/vnd.github.v3.html"
-                content.map { c =>
-                  List(
-                    "<div data-path=\"",
-                    path,
-                    "\" id=\"file\">",
-                    "<article>",
-                    renderMarkup(path.split("/").toList, new String(c), refStr, repository, false, false, true).body,
-                    "</article>",
-                    "</div>"
-                  ).mkString
-                }
-              }
-              case "application/vnd.github.v3.html" => {
-                contentType = "application/vnd.github.v3.html"
-                content.map { c =>
-                  List(
-                    "<div data-path=\"",
-                    path,
-                    "\" id=\"file\">",
-                    "<div class=\"plain\">",
-                    "<pre>",
-                    play.twirl.api.HtmlFormat.escape(new String(c)).body,
-                    "</pre>",
-                    "</div>",
-                    "</div>"
-                  ).mkString
-                }
-              }
-              case _ =>
-                Some(JsonFormat(ApiContents(f, RepositoryName(repository), content)))
-            }
-          }
-          .getOrElse(NotFound())
-
-      } else { // directory
-        JsonFormat(fileList.map { f =>
-          ApiContents(f, RepositoryName(repository), None)
-        })
-      }
-    }
-  }
-
-  /*
-   * https://developer.github.com/v3/git/refs/#get-a-reference
-   */
-  get("/api/v3/repos/:owner/:repository/git/refs/*")(referrersOnly { repository =>
-    val revstr = multiParams("splat").head
-    using(Git.open(getRepositoryDir(params("owner"), params("repository")))) { git =>
-      val ref = git.getRepository().findRef(revstr)
-
-      if (ref != null) {
-        val sha = ref.getObjectId().name()
-        JsonFormat(ApiRef(revstr, ApiObject(sha)))
-
-      } else {
-        val refs = git
-          .getRepository()
-          .getRefDatabase()
-          .getRefsByPrefix("refs/")
-          .asScala
-
-        JsonFormat(refs.map { ref =>
-          val sha = ref.getObjectId().name()
-          ApiRef(revstr, ApiObject(sha))
-        })
-      }
-    }
-  })
-
-  /**
-   * https://developer.github.com/v3/repos/collaborators/#list-collaborators
-   */
-  get("/api/v3/repos/:owner/:repository/collaborators")(referrersOnly { repository =>
-    // TODO Should ApiUser take permission? getCollaboratorUserNames does not return owner group members.
-    JsonFormat(
-      getCollaboratorUserNames(params("owner"), params("repository")).map(u => ApiUser(getAccountByUserName(u).get))
-    )
-  })
-
-  /**
-   * https://developer.github.com/v3/users/#get-the-authenticated-user
-   */
-  get("/api/v3/user") {
-    context.loginAccount.map { account =>
-      JsonFormat(ApiUser(account))
-    } getOrElse Unauthorized()
-  }
-
-  /**
-   * List user's own repository
-   * https://developer.github.com/v3/repos/#list-your-repositories
-   */
-  get("/api/v3/user/repos")(usersOnly {
-    JsonFormat(getVisibleRepositories(context.loginAccount, Option(context.loginAccount.get.userName)).map { r =>
-      ApiRepository(r, getAccountByUserName(r.owner).get)
-    })
-  })
-
-  /**
-   * Create user repository
-   * https://developer.github.com/v3/repos/#create
-   */
-  post("/api/v3/user/repos")(usersOnly {
-    val owner = context.loginAccount.get.userName
-    (for {
-      data <- extractFromJsonBody[CreateARepository] if data.isValid
-    } yield {
-      LockUtil.lock(s"${owner}/${data.name}") {
-        if (getRepository(owner, data.name).isEmpty) {
-          val f = createRepository(
-            context.loginAccount.get,
-            owner,
-            data.name,
-            data.description,
-            data.`private`,
-            data.auto_init
-          )
-          Await.result(f, Duration.Inf)
-
-          val repository = Database() withTransaction { session =>
-            getRepository(owner, data.name)(session).get
-          }
-          JsonFormat(ApiRepository(repository, ApiUser(getAccountByUserName(owner).get)))
-        } else {
-          ApiError(
-            "A repository with this name already exists on this account",
-            Some("https://developer.github.com/v3/repos/#create")
-          )
-        }
-      }
-    }) getOrElse NotFound()
-  })
-
-  /**
-   * Create group repository
-   * https://developer.github.com/v3/repos/#create
-   */
-  post("/api/v3/orgs/:org/repos")(managersOnly {
-    val groupName = params("org")
-    (for {
-      data <- extractFromJsonBody[CreateARepository] if data.isValid
-    } yield {
-      LockUtil.lock(s"${groupName}/${data.name}") {
-        if (getRepository(groupName, data.name).isEmpty) {
-          val f = createRepository(
-            context.loginAccount.get,
-            groupName,
-            data.name,
-            data.description,
-            data.`private`,
-            data.auto_init
-          )
-          Await.result(f, Duration.Inf)
-          val repository = Database() withTransaction { session =>
-            getRepository(groupName, data.name).get
-          }
-          JsonFormat(ApiRepository(repository, ApiUser(getAccountByUserName(groupName).get)))
-        } else {
-          ApiError(
-            "A repository with this name already exists for this group",
-            Some("https://developer.github.com/v3/repos/#create")
-          )
-        }
-      }
-    }) getOrElse NotFound()
-  })
-
-  /**
-   * https://developer.github.com/v3/repos/#enabling-and-disabling-branch-protection
-   */
-  patch("/api/v3/repos/:owner/:repository/branches/*")(ownerOnly { repository =>
-    import gitbucket.core.api._
-    (for {
-      branch <- params.get("splat") if repository.branchList.contains(branch)
-      protection <- extractFromJsonBody[ApiBranchProtection.EnablingAndDisabling].map(_.protection)
-      br <- getBranches(
-        repository.owner,
-        repository.name,
-        repository.repository.defaultBranch,
-        repository.repository.originUserName.isEmpty
-      ).find(_.name == branch)
-    } yield {
-      if (protection.enabled) {
-        enableBranchProtection(
-          repository.owner,
-          repository.name,
-          branch,
-          protection.status.enforcement_level == ApiBranchProtection.Everyone,
-          protection.status.contexts
-        )
-      } else {
-        disableBranchProtection(repository.owner, repository.name, branch)
-      }
-      JsonFormat(ApiBranch(branch, ApiBranchCommit(br.commitId), protection)(RepositoryName(repository)))
-    }) getOrElse NotFound()
-  })
-
-  /**
    * @see https://developer.github.com/v3/rate_limit/#get-your-current-rate-limit-status
    * but not enabled.
    */
@@ -407,459 +76,6 @@
   }
 
   /**
-   * https://developer.github.com/v3/issues/#list-issues-for-a-repository
-   */
-  get("/api/v3/repos/:owner/:repository/issues")(referrersOnly { repository =>
-    val page = IssueSearchCondition.page(request)
-    // TODO: more api spec condition
-    val condition = IssueSearchCondition(request)
-    val baseOwner = getAccountByUserName(repository.owner).get
-
-    val issues: List[(Issue, Account)] =
-      searchIssueByApi(
-        condition = condition,
-        offset = (page - 1) * PullRequestLimit,
-        limit = PullRequestLimit,
-        repos = repository.owner -> repository.name
-      )
-
-    JsonFormat(issues.map {
-      case (issue, issueUser) =>
-        ApiIssue(
-          issue = issue,
-          repositoryName = RepositoryName(repository),
-          user = ApiUser(issueUser),
-          labels = getIssueLabels(repository.owner, repository.name, issue.issueId)
-            .map(ApiLabel(_, RepositoryName(repository)))
-        )
-    })
-  })
-
-  /**
-   * https://developer.github.com/v3/issues/#get-a-single-issue
-   */
-  get("/api/v3/repos/:owner/:repository/issues/:id")(referrersOnly { repository =>
-    (for {
-      issueId <- params("id").toIntOpt
-      issue <- getIssue(repository.owner, repository.name, issueId.toString)
-      openedUser <- getAccountByUserName(issue.openedUserName)
-    } yield {
-      JsonFormat(
-        ApiIssue(
-          issue,
-          RepositoryName(repository),
-          ApiUser(openedUser),
-          getIssueLabels(repository.owner, repository.name, issue.issueId).map(ApiLabel(_, RepositoryName(repository)))
-        )
-      )
-    }) getOrElse NotFound()
-  })
-
-  /**
-   * https://developer.github.com/v3/issues/#create-an-issue
-   */
-  post("/api/v3/repos/:owner/:repository/issues")(readableUsersOnly { repository =>
-    if (isIssueEditable(repository)) { // TODO Should this check is provided by authenticator?
-      (for {
-        data <- extractFromJsonBody[CreateAnIssue]
-        loginAccount <- context.loginAccount
-      } yield {
-        val milestone = data.milestone.flatMap(getMilestone(repository.owner, repository.name, _))
-        val issue = createIssue(
-          repository,
-          data.title,
-          data.body,
-          data.assignees.headOption,
-          milestone.map(_.milestoneId),
-          None,
-          data.labels,
-          loginAccount
-        )
-        JsonFormat(
-          ApiIssue(
-            issue,
-            RepositoryName(repository),
-            ApiUser(loginAccount),
-            getIssueLabels(repository.owner, repository.name, issue.issueId)
-              .map(ApiLabel(_, RepositoryName(repository)))
-          )
-        )
-      }) getOrElse NotFound()
-    } else Unauthorized()
-  })
-
-  /**
-   * https://developer.github.com/v3/issues/comments/#list-comments-on-an-issue
-   */
-  get("/api/v3/repos/:owner/:repository/issues/:id/comments")(referrersOnly { repository =>
-    (for {
-      issueId <- params("id").toIntOpt
-      comments = getCommentsForApi(repository.owner, repository.name, issueId)
-    } yield {
-      JsonFormat(comments.map {
-        case (issueComment, user, issue) =>
-          ApiComment(issueComment, RepositoryName(repository), issueId, ApiUser(user), issue.isPullRequest)
-      })
-    }) getOrElse NotFound()
-  })
-
-  /**
-   * https://developer.github.com/v3/issues/comments/#create-a-comment
-   */
-  post("/api/v3/repos/:owner/:repository/issues/:id/comments")(readableUsersOnly { repository =>
-    (for {
-      issueId <- params("id").toIntOpt
-      issue <- getIssue(repository.owner, repository.name, issueId.toString)
-      body <- extractFromJsonBody[CreateAComment].map(_.body) if !body.isEmpty
-      action = params.get("action").filter(_ => isEditable(issue.userName, issue.repositoryName, issue.openedUserName))
-      (issue, id) <- handleComment(issue, Some(body), repository, action)
-      issueComment <- getComment(repository.owner, repository.name, id.toString())
-    } yield {
-      JsonFormat(
-        ApiComment(
-          issueComment,
-          RepositoryName(repository),
-          issueId,
-          ApiUser(context.loginAccount.get),
-          issue.isPullRequest
-        )
-      )
-    }) getOrElse NotFound()
-  })
-
-  /**
-   * List all labels for this repository
-   * https://developer.github.com/v3/issues/labels/#list-all-labels-for-this-repository
-   */
-  get("/api/v3/repos/:owner/:repository/labels")(referrersOnly { repository =>
-    JsonFormat(getLabels(repository.owner, repository.name).map { label =>
-      ApiLabel(label, RepositoryName(repository))
-    })
-  })
-
-  /**
-   * Get a single label
-   * https://developer.github.com/v3/issues/labels/#get-a-single-label
-   */
-  get("/api/v3/repos/:owner/:repository/labels/:labelName")(referrersOnly { repository =>
-    getLabel(repository.owner, repository.name, params("labelName")).map { label =>
-      JsonFormat(ApiLabel(label, RepositoryName(repository)))
-    } getOrElse NotFound()
-  })
-
-  /**
-   * Create a label
-   * https://developer.github.com/v3/issues/labels/#create-a-label
-   */
-  post("/api/v3/repos/:owner/:repository/labels")(writableUsersOnly { repository =>
-    (for {
-      data <- extractFromJsonBody[CreateALabel] if data.isValid
-    } yield {
-      LockUtil.lock(RepositoryName(repository).fullName) {
-        if (getLabel(repository.owner, repository.name, data.name).isEmpty) {
-          val labelId = createLabel(repository.owner, repository.name, data.name, data.color)
-          getLabel(repository.owner, repository.name, labelId).map { label =>
-            Created(JsonFormat(ApiLabel(label, RepositoryName(repository))))
-          } getOrElse NotFound()
-        } else {
-          // TODO ApiError should support errors field to enhance compatibility of GitHub API
-          UnprocessableEntity(
-            ApiError(
-              "Validation Failed",
-              Some("https://developer.github.com/v3/issues/labels/#create-a-label")
-            )
-          )
-        }
-      }
-    }) getOrElse NotFound()
-  })
-
-  /**
-   * Update a label
-   * https://developer.github.com/v3/issues/labels/#update-a-label
-   */
-  patch("/api/v3/repos/:owner/:repository/labels/:labelName")(writableUsersOnly { repository =>
-    (for {
-      data <- extractFromJsonBody[CreateALabel] if data.isValid
-    } yield {
-      LockUtil.lock(RepositoryName(repository).fullName) {
-        getLabel(repository.owner, repository.name, params("labelName")).map {
-          label =>
-            if (getLabel(repository.owner, repository.name, data.name).isEmpty) {
-              updateLabel(repository.owner, repository.name, label.labelId, data.name, data.color)
-              JsonFormat(
-                ApiLabel(
-                  getLabel(repository.owner, repository.name, label.labelId).get,
-                  RepositoryName(repository)
-                )
-              )
-            } else {
-              // TODO ApiError should support errors field to enhance compatibility of GitHub API
-              UnprocessableEntity(
-                ApiError(
-                  "Validation Failed",
-                  Some("https://developer.github.com/v3/issues/labels/#create-a-label")
-                )
-              )
-            }
-        } getOrElse NotFound()
-      }
-    }) getOrElse NotFound()
-  })
-
-  /**
-   * Delete a label
-   * https://developer.github.com/v3/issues/labels/#delete-a-label
-   */
-  delete("/api/v3/repos/:owner/:repository/labels/:labelName")(writableUsersOnly { repository =>
-    LockUtil.lock(RepositoryName(repository).fullName) {
-      getLabel(repository.owner, repository.name, params("labelName")).map { label =>
-        deleteLabel(repository.owner, repository.name, label.labelId)
-        NoContent()
-      } getOrElse NotFound()
-    }
-  })
-
-  /**
-   * https://developer.github.com/v3/pulls/#list-pull-requests
-   */
-  get("/api/v3/repos/:owner/:repository/pulls")(referrersOnly { repository =>
-    val page = IssueSearchCondition.page(request)
-    // TODO: more api spec condition
-    val condition = IssueSearchCondition(request)
-    val baseOwner = getAccountByUserName(repository.owner).get
-
-    val issues: List[(Issue, Account, Int, PullRequest, Repository, Account, Option[Account])] =
-      searchPullRequestByApi(
-        condition = condition,
-        offset = (page - 1) * PullRequestLimit,
-        limit = PullRequestLimit,
-        repos = repository.owner -> repository.name
-      )
-
-    JsonFormat(issues.map {
-      case (issue, issueUser, commentCount, pullRequest, headRepo, headOwner, assignee) =>
-        ApiPullRequest(
-          issue = issue,
-          pullRequest = pullRequest,
-          headRepo = ApiRepository(headRepo, ApiUser(headOwner)),
-          baseRepo = ApiRepository(repository, ApiUser(baseOwner)),
-          user = ApiUser(issueUser),
-          labels = getIssueLabels(repository.owner, repository.name, issue.issueId)
-            .map(ApiLabel(_, RepositoryName(repository))),
-          assignee = assignee.map(ApiUser.apply),
-          mergedComment = getMergedComment(repository.owner, repository.name, issue.issueId)
-        )
-    })
-  })
-
-  /**
-   * https://developer.github.com/v3/pulls/#get-a-single-pull-request
-   */
-  get("/api/v3/repos/:owner/:repository/pulls/:id")(referrersOnly { repository =>
-    (for {
-      issueId <- params("id").toIntOpt
-      (issue, pullRequest) <- getPullRequest(repository.owner, repository.name, issueId)
-      users = getAccountsByUserNames(
-        Set(repository.owner, pullRequest.requestUserName, issue.openedUserName),
-        Set.empty
-      )
-      baseOwner <- users.get(repository.owner)
-      headOwner <- users.get(pullRequest.requestUserName)
-      issueUser <- users.get(issue.openedUserName)
-      assignee = issue.assignedUserName.flatMap { userName =>
-        getAccountByUserName(userName, false)
-      }
-      headRepo <- getRepository(pullRequest.requestUserName, pullRequest.requestRepositoryName)
-    } yield {
-      JsonFormat(
-        ApiPullRequest(
-          issue = issue,
-          pullRequest = pullRequest,
-          headRepo = ApiRepository(headRepo, ApiUser(headOwner)),
-          baseRepo = ApiRepository(repository, ApiUser(baseOwner)),
-          user = ApiUser(issueUser),
-          labels = getIssueLabels(repository.owner, repository.name, issue.issueId)
-            .map(ApiLabel(_, RepositoryName(repository))),
-          assignee = assignee.map(ApiUser.apply),
-          mergedComment = getMergedComment(repository.owner, repository.name, issue.issueId)
-        )
-      )
-    }) getOrElse NotFound()
-  })
-
-  /**
-   * https://developer.github.com/v3/pulls/#list-commits-on-a-pull-request
-   */
-  get("/api/v3/repos/:owner/:repository/pulls/:id/commits")(referrersOnly { repository =>
-    val owner = repository.owner
-    val name = repository.name
-    params("id").toIntOpt.flatMap {
-      issueId =>
-        getPullRequest(owner, name, issueId) map {
-          case (issue, pullreq) =>
-            using(Git.open(getRepositoryDir(owner, name))) { git =>
-              val oldId = git.getRepository.resolve(pullreq.commitIdFrom)
-              val newId = git.getRepository.resolve(pullreq.commitIdTo)
-              val repoFullName = RepositoryName(repository)
-              val commits = git.log
-                .addRange(oldId, newId)
-                .call
-                .iterator
-                .asScala
-                .map { c =>
-                  ApiCommitListItem(new CommitInfo(c), repoFullName)
-                }
-                .toList
-              JsonFormat(commits)
-            }
-        }
-    } getOrElse NotFound()
-  })
-
-  /**
-   * https://developer.github.com/v3/repos/#get
-   */
-  get("/api/v3/repos/:owner/:repository")(referrersOnly { repository =>
-    JsonFormat(ApiRepository(repository, ApiUser(getAccountByUserName(repository.owner).get)))
-  })
-
-  /**
-   * https://developer.github.com/v3/repos/statuses/#create-a-status
-   */
-  post("/api/v3/repos/:owner/:repository/statuses/:sha")(writableUsersOnly { repository =>
-    (for {
-      ref <- params.get("sha")
-      sha <- JGitUtil.getShaByRef(repository.owner, repository.name, ref)
-      data <- extractFromJsonBody[CreateAStatus] if data.isValid
-      creator <- context.loginAccount
-      state <- CommitState.valueOf(data.state)
-      statusId = createCommitStatus(
-        repository.owner,
-        repository.name,
-        sha,
-        data.context.getOrElse("default"),
-        state,
-        data.target_url,
-        data.description,
-        new java.util.Date(),
-        creator
-      )
-      status <- getCommitStatus(repository.owner, repository.name, statusId)
-    } yield {
-      JsonFormat(ApiCommitStatus(status, ApiUser(creator)))
-    }) getOrElse NotFound()
-  })
-
-  /**
-   * https://developer.github.com/v3/repos/statuses/#list-statuses-for-a-specific-ref
-   *
-   * ref is Ref to list the statuses from. It can be a SHA, a branch name, or a tag name.
-   */
-  val listStatusesRoute = get("/api/v3/repos/:owner/:repository/commits/:ref/statuses")(referrersOnly { repository =>
-    (for {
-      ref <- params.get("ref")
-      sha <- JGitUtil.getShaByRef(repository.owner, repository.name, ref)
-    } yield {
-      JsonFormat(getCommitStatuesWithCreator(repository.owner, repository.name, sha).map {
-        case (status, creator) =>
-          ApiCommitStatus(status, ApiUser(creator))
-      })
-    }) getOrElse NotFound()
-  })
-
-  /**
-   * https://developer.github.com/v3/repos/statuses/#list-statuses-for-a-specific-ref
-   *
-   * legacy route
-   */
-  get("/api/v3/repos/:owner/:repository/statuses/:ref") {
-    listStatusesRoute.action()
-  }
-
-  /**
-   * https://developer.github.com/v3/repos/statuses/#get-the-combined-status-for-a-specific-ref
-   *
-   * ref is Ref to list the statuses from. It can be a SHA, a branch name, or a tag name.
-   */
-  get("/api/v3/repos/:owner/:repository/commits/:ref/status")(referrersOnly { repository =>
-    (for {
-      ref <- params.get("ref")
-      owner <- getAccountByUserName(repository.owner)
-      sha <- JGitUtil.getShaByRef(repository.owner, repository.name, ref)
-    } yield {
-      val statuses = getCommitStatuesWithCreator(repository.owner, repository.name, sha)
-      JsonFormat(ApiCombinedCommitStatus(sha, statuses, ApiRepository(repository, owner)))
-    }) getOrElse NotFound()
-  })
-
-  /**
-   * https://developer.github.com/v3/repos/commits/#get-a-single-commit
-   */
-  get("/api/v3/repos/:owner/:repository/commits/:sha")(referrersOnly { repository =>
-    val owner = repository.owner
-    val name = repository.name
-    val sha = params("sha")
-
-    using(Git.open(getRepositoryDir(owner, name))) {
-      git =>
-        val repo = git.getRepository
-        val objectId = repo.resolve(sha)
-        val commitInfo = using(new RevWalk(repo)) { revWalk =>
-          new CommitInfo(revWalk.parseCommit(objectId))
-        }
-
-        JsonFormat(
-          ApiCommits(
-            repositoryName = RepositoryName(repository),
-            commitInfo = commitInfo,
-            diffs = JGitUtil.getDiffs(git, commitInfo.parents.headOption, commitInfo.id, false, true),
-            author = getAccount(commitInfo.authorName, commitInfo.authorEmailAddress),
-            committer = getAccount(commitInfo.committerName, commitInfo.committerEmailAddress),
-            commentCount = getCommitComment(repository.owner, repository.name, sha).size
-          )
-        )
-    }
-  })
-
-  private def getAccount(userName: String, email: String): Account = {
-    getAccountByMailAddress(email).getOrElse {
-      Account(
-        userName = userName,
-        fullName = userName,
-        mailAddress = email,
-        password = "xxx",
-        isAdmin = false,
-        url = None,
-        registeredDate = new java.util.Date(),
-        updatedDate = new java.util.Date(),
-        lastLoginDate = None,
-        image = None,
-        isGroupAccount = false,
-        isRemoved = true,
-        description = None
-      )
-    }
-  }
-
-  private def isEditable(owner: String, repository: String, author: String)(implicit context: Context): Boolean =
-    hasDeveloperRole(owner, repository, context.loginAccount) || author == context.loginAccount.get.userName
-
-  /**
-   * non-GitHub compatible API for Jenkins-Plugin
-   */
-  get("/api/v3/repos/:owner/:repository/raw/*")(referrersOnly { repository =>
-    val (id, path) = repository.splitPath(multiParams("splat").head)
-    using(Git.open(getRepositoryDir(repository.owner, repository.name))) { git =>
-      val revCommit = JGitUtil.getRevCommitFromId(git, git.getRepository.resolve(id))
-
-      getPathObjectId(git, path, revCommit).map { objectId =>
-        responseRawFile(git, objectId, path, repository)
-      } getOrElse NotFound()
-    }
-  })
-
-  /**
    * non-GitHub compatible API for listing plugins
    */
   get("/api/v3/gitbucket/plugins") {
diff --git a/src/main/scala/gitbucket/core/controller/api/ApiGitReferenceControllerBase.scala b/src/main/scala/gitbucket/core/controller/api/ApiGitReferenceControllerBase.scala
new file mode 100644
index 0000000..9069733
--- /dev/null
+++ b/src/main/scala/gitbucket/core/controller/api/ApiGitReferenceControllerBase.scala
@@ -0,0 +1,60 @@
+package gitbucket.core.controller.api
+import gitbucket.core.api.{ApiObject, ApiRef, JsonFormat}
+import gitbucket.core.controller.ControllerBase
+import gitbucket.core.util.Directory.getRepositoryDir
+import gitbucket.core.util.ReferrerAuthenticator
+import gitbucket.core.util.SyntaxSugars.using
+import gitbucket.core.util.Implicits._
+import org.eclipse.jgit.api.Git
+import scala.collection.JavaConverters._
+
+trait ApiGitReferenceControllerBase extends ControllerBase {
+  self: ReferrerAuthenticator =>
+
+  /*
+   * i. Get a reference
+   * https://developer.github.com/v3/git/refs/#get-a-reference
+   */
+  get("/api/v3/repos/:owner/:repository/git/refs/*")(referrersOnly { repository =>
+    val revstr = multiParams("splat").head
+    using(Git.open(getRepositoryDir(params("owner"), params("repository")))) { git =>
+      val ref = git.getRepository().findRef(revstr)
+
+      if (ref != null) {
+        val sha = ref.getObjectId().name()
+        JsonFormat(ApiRef(revstr, ApiObject(sha)))
+
+      } else {
+        val refs = git
+          .getRepository()
+          .getRefDatabase()
+          .getRefsByPrefix("refs/")
+          .asScala
+
+        JsonFormat(refs.map { ref =>
+          val sha = ref.getObjectId().name()
+          ApiRef(revstr, ApiObject(sha))
+        })
+      }
+    }
+  })
+  /*
+   * ii. Get all references
+   * https://developer.github.com/v3/git/refs/#get-all-references
+   */
+
+  /*
+   * iii. Create a reference
+   * https://developer.github.com/v3/git/refs/#create-a-reference
+   */
+
+  /*
+   * iv. Update a reference
+   * https://developer.github.com/v3/git/refs/#update-a-reference
+   */
+
+  /*
+ * v. Delete a reference
+ * https://developer.github.com/v3/git/refs/#delete-a-reference
+ */
+}
diff --git a/src/main/scala/gitbucket/core/controller/api/ApiIssueCommentControllerBase.scala b/src/main/scala/gitbucket/core/controller/api/ApiIssueCommentControllerBase.scala
new file mode 100644
index 0000000..89d8033
--- /dev/null
+++ b/src/main/scala/gitbucket/core/controller/api/ApiIssueCommentControllerBase.scala
@@ -0,0 +1,79 @@
+package gitbucket.core.controller.api
+import gitbucket.core.api.{ApiComment, ApiUser, CreateAComment, JsonFormat}
+import gitbucket.core.controller.{Context, ControllerBase}
+import gitbucket.core.service._
+import gitbucket.core.util.Implicits._
+import gitbucket.core.util.{ReadableUsersAuthenticator, ReferrerAuthenticator, RepositoryName}
+
+trait ApiIssueCommentControllerBase extends ControllerBase {
+  self: AccountService
+    with IssuesService
+    with RepositoryService
+    with HandleCommentService
+    with MilestonesService
+    with ReadableUsersAuthenticator
+    with ReferrerAuthenticator =>
+  /*
+   * i. List comments on an issue
+   * https://developer.github.com/v3/issues/comments/#list-comments-on-an-issue
+   */
+  get("/api/v3/repos/:owner/:repository/issues/:id/comments")(referrersOnly { repository =>
+    (for {
+      issueId <- params("id").toIntOpt
+      comments = getCommentsForApi(repository.owner, repository.name, issueId)
+    } yield {
+      JsonFormat(comments.map {
+        case (issueComment, user, issue) =>
+          ApiComment(issueComment, RepositoryName(repository), issueId, ApiUser(user), issue.isPullRequest)
+      })
+    }) getOrElse NotFound()
+  })
+
+  /*
+   * ii. List comments in a repository
+   * https://developer.github.com/v3/issues/comments/#list-comments-in-a-repository
+   */
+
+  /*
+   * iii. Get a single comment
+   * https://developer.github.com/v3/issues/comments/#get-a-single-comment
+   */
+
+  /*
+   * iv. Create a comment
+   * https://developer.github.com/v3/issues/comments/#create-a-comment
+   */
+  post("/api/v3/repos/:owner/:repository/issues/:id/comments")(readableUsersOnly { repository =>
+    (for {
+      issueId <- params("id").toIntOpt
+      issue <- getIssue(repository.owner, repository.name, issueId.toString)
+      body <- extractFromJsonBody[CreateAComment].map(_.body) if !body.isEmpty
+      action = params.get("action").filter(_ => isEditable(issue.userName, issue.repositoryName, issue.openedUserName))
+      (issue, id) <- handleComment(issue, Some(body), repository, action)
+      issueComment <- getComment(repository.owner, repository.name, id.toString())
+    } yield {
+      JsonFormat(
+        ApiComment(
+          issueComment,
+          RepositoryName(repository),
+          issueId,
+          ApiUser(context.loginAccount.get),
+          issue.isPullRequest
+        )
+      )
+    }) getOrElse NotFound()
+  })
+
+  /*
+   * v. Edit a comment
+   * https://developer.github.com/v3/issues/comments/#edit-a-comment
+   */
+
+  /*
+   * vi. Delete a comment
+   * https://developer.github.com/v3/issues/comments/#delete-a-comment
+   */
+
+  private def isEditable(owner: String, repository: String, author: String)(implicit context: Context): Boolean =
+    hasDeveloperRole(owner, repository, context.loginAccount) || author == context.loginAccount.get.userName
+}
diff --git a/src/main/scala/gitbucket/core/controller/api/ApiIssueControllerBase.scala b/src/main/scala/gitbucket/core/controller/api/ApiIssueControllerBase.scala
new file mode 100644
index 0000000..6fe0632
--- /dev/null
+++ b/src/main/scala/gitbucket/core/controller/api/ApiIssueControllerBase.scala
@@ -0,0 +1,121 @@
+package gitbucket.core.controller.api
+import gitbucket.core.api._
+import gitbucket.core.controller.ControllerBase
+import gitbucket.core.model.{Account, Issue}
+import gitbucket.core.service.{AccountService, IssueCreationService, IssuesService, MilestonesService}
+import gitbucket.core.service.IssuesService.IssueSearchCondition
+import gitbucket.core.service.PullRequestService.PullRequestLimit
+import gitbucket.core.util.{ReadableUsersAuthenticator, ReferrerAuthenticator, RepositoryName}
+import gitbucket.core.util.Implicits._
+
+trait ApiIssueControllerBase extends ControllerBase {
+  self: AccountService
+    with IssuesService
+    with IssueCreationService
+    with MilestonesService
+    with ReadableUsersAuthenticator
+    with ReferrerAuthenticator =>
+  /*
+   * i. List issues
+   * https://developer.github.com/v3/issues/#list-issues
+   */
+
+  /*
+   * ii. List issues for a repository
+   * https://developer.github.com/v3/issues/#list-issues-for-a-repository
+   */
+  get("/api/v3/repos/:owner/:repository/issues")(referrersOnly { repository =>
+    val page = IssueSearchCondition.page(request)
+    // TODO: more api spec condition
+    val condition = IssueSearchCondition(request)
+    val baseOwner = getAccountByUserName(repository.owner).get
+
+    val issues: List[(Issue, Account)] =
+      searchIssueByApi(
+        condition = condition,
+        offset = (page - 1) * PullRequestLimit,
+        limit = PullRequestLimit,
+        repos = repository.owner -> repository.name
+      )
+
+    JsonFormat(issues.map {
+      case (issue, issueUser) =>
+        ApiIssue(
+          issue = issue,
+          repositoryName = RepositoryName(repository),
+          user = ApiUser(issueUser),
+          labels = getIssueLabels(repository.owner, repository.name, issue.issueId)
+            .map(ApiLabel(_, RepositoryName(repository)))
+        )
+    })
+  })
+
+  /*
+   * iii. Get a single issue
+   * https://developer.github.com/v3/issues/#get-a-single-issue
+   */
+  get("/api/v3/repos/:owner/:repository/issues/:id")(referrersOnly { repository =>
+    (for {
+      issueId <- params("id").toIntOpt
+      issue <- getIssue(repository.owner, repository.name, issueId.toString)
+      openedUser <- getAccountByUserName(issue.openedUserName)
+    } yield {
+      JsonFormat(
+        ApiIssue(
+          issue,
+          RepositoryName(repository),
+          ApiUser(openedUser),
+          getIssueLabels(repository.owner, repository.name, issue.issueId).map(ApiLabel(_, RepositoryName(repository)))
+        )
+      )
+    }) getOrElse NotFound()
+  })
+
+  /*
+   * iv. Create an issue
+   * https://developer.github.com/v3/issues/#create-an-issue
+   */
+  post("/api/v3/repos/:owner/:repository/issues")(readableUsersOnly { repository =>
+    if (isIssueEditable(repository)) { // TODO Should this check is provided by authenticator?
+      (for {
+        data <- extractFromJsonBody[CreateAnIssue]
+        loginAccount <- context.loginAccount
+      } yield {
+        val milestone = data.milestone.flatMap(getMilestone(repository.owner, repository.name, _))
+        val issue = createIssue(
+          repository,
+          data.title,
+          data.body,
+          data.assignees.headOption,
+          milestone.map(_.milestoneId),
+          None,
+          data.labels,
+          loginAccount
+        )
+        JsonFormat(
+          ApiIssue(
+            issue,
+            RepositoryName(repository),
+            ApiUser(loginAccount),
+            getIssueLabels(repository.owner, repository.name, issue.issueId)
+              .map(ApiLabel(_, RepositoryName(repository)))
+          )
+        )
+      }) getOrElse NotFound()
+    } else Unauthorized()
+  })
+  /*
+   * v. Edit an issue
+   * https://developer.github.com/v3/issues/#edit-an-issue
+   */
+
+  /*
+   * vi. Lock an issue
+   * https://developer.github.com/v3/issues/#lock-an-issue
+   */
+
+  /*
+ * vii. Unlock an issue
+ * https://developer.github.com/v3/issues/#unlock-an-issue
+ */
+}
diff --git a/src/main/scala/gitbucket/core/controller/api/ApiIssueLabelControllerBase.scala b/src/main/scala/gitbucket/core/controller/api/ApiIssueLabelControllerBase.scala
new file mode 100644
index 0000000..0f9e4cc
--- /dev/null
+++ b/src/main/scala/gitbucket/core/controller/api/ApiIssueLabelControllerBase.scala
@@ -0,0 +1,137 @@
+package gitbucket.core.controller.api
+import gitbucket.core.api.{ApiError, ApiLabel, CreateALabel, JsonFormat}
+import gitbucket.core.controller.ControllerBase
+import gitbucket.core.service._
+import gitbucket.core.util.Implicits._
+import gitbucket.core.util._
+import org.scalatra.{Created, NoContent, UnprocessableEntity}
+
+trait ApiIssueLabelControllerBase extends ControllerBase {
+  self: AccountService
+    with IssuesService
+    with LabelsService
+    with ReferrerAuthenticator
+    with WritableUsersAuthenticator =>
+
+  /*
+   * i. List all labels for this repository
+   * https://developer.github.com/v3/issues/labels/#list-all-labels-for-this-repository
+   */
+  get("/api/v3/repos/:owner/:repository/labels")(referrersOnly { repository =>
+    JsonFormat(getLabels(repository.owner, repository.name).map { label =>
+      ApiLabel(label, RepositoryName(repository))
+    })
+  })
+
+  /*
+   * ii. Get a single label
+   * https://developer.github.com/v3/issues/labels/#get-a-single-label
+   */
+  get("/api/v3/repos/:owner/:repository/labels/:labelName")(referrersOnly { repository =>
+    getLabel(repository.owner, repository.name, params("labelName")).map { label =>
+      JsonFormat(ApiLabel(label, RepositoryName(repository)))
+    } getOrElse NotFound()
+  })
+
+  /*
+   * iii. Create a label
+   * https://developer.github.com/v3/issues/labels/#create-a-label
+   */
+  post("/api/v3/repos/:owner/:repository/labels")(writableUsersOnly { repository =>
+    (for {
+      data <- extractFromJsonBody[CreateALabel] if data.isValid
+    } yield {
+      LockUtil.lock(RepositoryName(repository).fullName) {
+        if (getLabel(repository.owner, repository.name, data.name).isEmpty) {
+          val labelId = createLabel(repository.owner, repository.name, data.name, data.color)
+          getLabel(repository.owner, repository.name, labelId).map { label =>
+            Created(JsonFormat(ApiLabel(label, RepositoryName(repository))))
+          } getOrElse NotFound()
+        } else {
+          // TODO ApiError should support errors field to enhance compatibility of GitHub API
+          UnprocessableEntity(
+            ApiError(
+              "Validation Failed",
+              Some("https://developer.github.com/v3/issues/labels/#create-a-label")
+            )
+          )
+        }
+      }
+    }) getOrElse NotFound()
+  })
+
+  /*
+   * iv. Update a label
+   * https://developer.github.com/v3/issues/labels/#update-a-label
+   */
+  patch("/api/v3/repos/:owner/:repository/labels/:labelName")(writableUsersOnly { repository =>
+    (for {
+      data <- extractFromJsonBody[CreateALabel] if data.isValid
+    } yield {
+      LockUtil.lock(RepositoryName(repository).fullName) {
+        getLabel(repository.owner, repository.name, params("labelName")).map {
+          label =>
+            if (getLabel(repository.owner, repository.name, data.name).isEmpty) {
+              updateLabel(repository.owner, repository.name, label.labelId, data.name, data.color)
+              JsonFormat(
+                ApiLabel(
+                  getLabel(repository.owner, repository.name, label.labelId).get,
+                  RepositoryName(repository)
+                )
+              )
+            } else {
+              // TODO ApiError should support errors field to enhance compatibility of GitHub API
+              UnprocessableEntity(
+                ApiError(
+                  "Validation Failed",
+                  Some("https://developer.github.com/v3/issues/labels/#create-a-label")
+                )
+              )
+            }
+        } getOrElse NotFound()
+      }
+    }) getOrElse NotFound()
+  })
+
+  /*
+   * v. Delete a label
+   * https://developer.github.com/v3/issues/labels/#delete-a-label
+   */
+  delete("/api/v3/repos/:owner/:repository/labels/:labelName")(writableUsersOnly { repository =>
+    LockUtil.lock(RepositoryName(repository).fullName) {
+      getLabel(repository.owner, repository.name, params("labelName")).map { label =>
+        deleteLabel(repository.owner, repository.name, label.labelId)
+        NoContent()
+      } getOrElse NotFound()
+    }
+  })
+  /*
+   * vi. List labels on an issue
+   * https://developer.github.com/v3/issues/labels/#list-labels-on-an-issue
+   */
+
+  /*
+   * vii. Add labels to an issue
+   * https://developer.github.com/v3/issues/labels/#add-labels-to-an-issue
+   */
+
+  /*
+   * viii. Remove a label from an issue
+   * https://developer.github.com/v3/issues/labels/#remove-a-label-from-an-issue
+   */
+
+  /*
+   * ix. Replace all labels for an issue
+   * https://developer.github.com/v3/issues/labels/#replace-all-labels-for-an-issue
+   */
+
+  /*
+   * x. Remove all labels from an issue
+   * https://developer.github.com/v3/issues/labels/#remove-all-labels-from-an-issue
+   */
+
+  /*
+ * xi Get labels for every issue in a milestone
+ * https://developer.github.com/v3/issues/labels/#get-labels-for-every-issue-in-a-milestone
+ */
+}
diff --git a/src/main/scala/gitbucket/core/controller/api/ApiOrganizationControllerBase.scala b/src/main/scala/gitbucket/core/controller/api/ApiOrganizationControllerBase.scala
new file mode 100644
index 0000000..0b64c9f
--- /dev/null
+++ b/src/main/scala/gitbucket/core/controller/api/ApiOrganizationControllerBase.scala
@@ -0,0 +1,34 @@
+package gitbucket.core.controller.api
+import gitbucket.core.api.{ApiRepository, ApiUser, JsonFormat}
+import gitbucket.core.controller.ControllerBase
+import gitbucket.core.service.{AccountService, RepositoryService}
+import gitbucket.core.util.Implicits._
+
+trait ApiOrganizationControllerBase extends ControllerBase {
+  self: RepositoryService with AccountService =>
+
+  /*
+   * i. List your organizations
+   * https://developer.github.com/v3/orgs/#list-your-organizations
+   */
+
+  /*
+   * ii. List all organizations
+   * https://developer.github.com/v3/orgs/#list-all-organizations
+   */
+
+  /*
+   * iii. List user organizations
+   * https://developer.github.com/v3/orgs/#list-user-organizations
+   */
+
+  /**
+   * iv. Get an organization
+   * https://developer.github.com/v3/orgs/#get-an-organization
+   */
+  get("/api/v3/orgs/:groupName") {
+    getAccountByUserName(params("groupName")).filter(account => account.isGroupAccount).map { account =>
+      JsonFormat(ApiUser(account))
+    } getOrElse NotFound()
+  }
+}
diff --git a/src/main/scala/gitbucket/core/controller/api/ApiPullRequestControllerBase.scala b/src/main/scala/gitbucket/core/controller/api/ApiPullRequestControllerBase.scala
new file mode 100644
index 0000000..fe66183
--- /dev/null
+++ b/src/main/scala/gitbucket/core/controller/api/ApiPullRequestControllerBase.scala
@@ -0,0 +1,161 @@
+package gitbucket.core.controller.api
+import gitbucket.core.api._
+import gitbucket.core.controller.ControllerBase
+import gitbucket.core.model.{Account, Issue, PullRequest, Repository}
+import gitbucket.core.service.{AccountService, IssuesService, PullRequestService, RepositoryService}
+import gitbucket.core.service.IssuesService.IssueSearchCondition
+import gitbucket.core.service.PullRequestService.PullRequestLimit
+import gitbucket.core.util.Directory.getRepositoryDir
+import gitbucket.core.util.Implicits._
+import gitbucket.core.util.JGitUtil.CommitInfo
+import gitbucket.core.util.SyntaxSugars.using
+import gitbucket.core.util.{ReferrerAuthenticator, RepositoryName}
+import org.eclipse.jgit.api.Git
+import scala.collection.JavaConverters._
+
+trait ApiPullRequestControllerBase extends ControllerBase {
+  self: AccountService with IssuesService with PullRequestService with RepositoryService with ReferrerAuthenticator =>
+
+  /*
+   * i. Link Relations
+   * https://developer.github.com/v3/pulls/#link-relations
+   */
+
+  /*
+   * ii. List pull requests
+   * https://developer.github.com/v3/pulls/#list-pull-requests
+   */
+  /**
+   * https://developer.github.com/v3/pulls/#list-pull-requests
+   */
+  get("/api/v3/repos/:owner/:repository/pulls")(referrersOnly { repository =>
+    val page = IssueSearchCondition.page(request)
+    // TODO: more api spec condition
+    val condition = IssueSearchCondition(request)
+    val baseOwner = getAccountByUserName(repository.owner).get
+
+    val issues: List[(Issue, Account, Int, PullRequest, Repository, Account, Option[Account])] =
+      searchPullRequestByApi(
+        condition = condition,
+        offset = (page - 1) * PullRequestLimit,
+        limit = PullRequestLimit,
+        repos = repository.owner -> repository.name
+      )
+
+    JsonFormat(issues.map {
+      case (issue, issueUser, commentCount, pullRequest, headRepo, headOwner, assignee) =>
+        ApiPullRequest(
+          issue = issue,
+          pullRequest = pullRequest,
+          headRepo = ApiRepository(headRepo, ApiUser(headOwner)),
+          baseRepo = ApiRepository(repository, ApiUser(baseOwner)),
+          user = ApiUser(issueUser),
+          labels = getIssueLabels(repository.owner, repository.name, issue.issueId)
+            .map(ApiLabel(_, RepositoryName(repository))),
+          assignee = assignee.map(ApiUser.apply),
+          mergedComment = getMergedComment(repository.owner, repository.name, issue.issueId)
+        )
+    })
+  })
+
+  /*
+   * iii. Get a single pull request
+   * https://developer.github.com/v3/pulls/#get-a-single-pull-request
+   */
+  /**
+   * https://developer.github.com/v3/pulls/#get-a-single-pull-request
+   */
+  get("/api/v3/repos/:owner/:repository/pulls/:id")(referrersOnly { repository =>
+    (for {
+      issueId <- params("id").toIntOpt
+      (issue, pullRequest) <- getPullRequest(repository.owner, repository.name, issueId)
+      users = getAccountsByUserNames(
+        Set(repository.owner, pullRequest.requestUserName, issue.openedUserName),
+        Set.empty
+      )
+      baseOwner <- users.get(repository.owner)
+      headOwner <- users.get(pullRequest.requestUserName)
+      issueUser <- users.get(issue.openedUserName)
+      assignee = issue.assignedUserName.flatMap { userName =>
+        getAccountByUserName(userName, false)
+      }
+      headRepo <- getRepository(pullRequest.requestUserName, pullRequest.requestRepositoryName)
+    } yield {
+      JsonFormat(
+        ApiPullRequest(
+          issue = issue,
+          pullRequest = pullRequest,
+          headRepo = ApiRepository(headRepo, ApiUser(headOwner)),
+          baseRepo = ApiRepository(repository, ApiUser(baseOwner)),
+          user = ApiUser(issueUser),
+          labels = getIssueLabels(repository.owner, repository.name, issue.issueId)
+            .map(ApiLabel(_, RepositoryName(repository))),
+          assignee = assignee.map(ApiUser.apply),
+          mergedComment = getMergedComment(repository.owner, repository.name, issue.issueId)
+        )
+      )
+    }) getOrElse NotFound()
+  })
+
+  /*
+   * iv. Create a pull request
+   * https://developer.github.com/v3/pulls/#create-a-pull-request
+   */
+
+  /*
+   * v. Update a pull request
+   * https://developer.github.com/v3/pulls/#update-a-pull-request
+   */
+
+  /*
+   * vi. List commits on a pull request
+   * https://developer.github.com/v3/pulls/#list-commits-on-a-pull-request
+   */
+  /**
+   * https://developer.github.com/v3/pulls/#list-commits-on-a-pull-request
+   */
+  get("/api/v3/repos/:owner/:repository/pulls/:id/commits")(referrersOnly { repository =>
+    val owner = repository.owner
+    val name = repository.name
+    params("id").toIntOpt.flatMap {
+      issueId =>
+        getPullRequest(owner, name, issueId) map {
+          case (issue, pullreq) =>
+            using(Git.open(getRepositoryDir(owner, name))) { git =>
+              val oldId = git.getRepository.resolve(pullreq.commitIdFrom)
+              val newId = git.getRepository.resolve(pullreq.commitIdTo)
+              val repoFullName = RepositoryName(repository)
+              val commits = git.log
+                .addRange(oldId, newId)
+                .call
+                .iterator
+                .asScala
+                .map { c =>
+                  ApiCommitListItem(new CommitInfo(c), repoFullName)
+                }
+                .toList
+              JsonFormat(commits)
+            }
+        }
+    } getOrElse NotFound()
+  })
+  /*
+   * vii. List pull requests files
+   * https://developer.github.com/v3/pulls/#list-pull-requests-files
+   */
+
+  /*
+   * viii. Get if a pull request has been merged
+   * https://developer.github.com/v3/pulls/#get-if-a-pull-request-has-been-merged
+   */
+
+  /*
+   * ix. Merge a pull request (Merge Button)
+   * https://developer.github.com/v3/pulls/#merge-a-pull-request-merge-button
+   */
+
+  /*
+ * x. Labels, assignees, and milestones
+ * https://developer.github.com/v3/pulls/#labels-assignees-and-milestones
+ */
+}
diff --git a/src/main/scala/gitbucket/core/controller/api/ApiRepositoryBranchControllerBase.scala b/src/main/scala/gitbucket/core/controller/api/ApiRepositoryBranchControllerBase.scala
new file mode 100644
index 0000000..fa2d59a
--- /dev/null
+++ b/src/main/scala/gitbucket/core/controller/api/ApiRepositoryBranchControllerBase.scala
@@ -0,0 +1,236 @@
+package gitbucket.core.controller.api
+import gitbucket.core.api._
+import gitbucket.core.controller.ControllerBase
+import gitbucket.core.service.{AccountService, ProtectedBranchService, RepositoryService}
+import gitbucket.core.util._
+import gitbucket.core.util.Implicits._
+import gitbucket.core.util.JGitUtil.getBranches
+
+trait ApiRepositoryBranchControllerBase extends ControllerBase {
+  self: RepositoryService
+    with AccountService
+    with OwnerAuthenticator
+    with UsersAuthenticator
+    with GroupManagerAuthenticator
+    with ProtectedBranchService
+    with ReferrerAuthenticator
+    with ReadableUsersAuthenticator
+    with WritableUsersAuthenticator =>
+
+  /**
+   * i. List branches
+   * https://developer.github.com/v3/repos/branches/#list-branches
+   */
+  get("/api/v3/repos/:owner/:repository/branches")(referrersOnly { repository =>
+    JsonFormat(
+      JGitUtil
+        .getBranches(
+          owner = repository.owner,
+          name = repository.name,
+          defaultBranch = repository.repository.defaultBranch,
+          origin = repository.repository.originUserName.isEmpty
+        )
+        .map { br =>
+          ApiBranchForList(br.name, ApiBranchCommit(br.commitId))
+        }
+    )
+  })
+
+  /**
+   * ii. Get branch
+   * https://developer.github.com/v3/repos/branches/#get-branch
+   */
+  get("/api/v3/repos/:owner/:repository/branches/*")(referrersOnly { repository =>
+    //import gitbucket.core.api._
+    (for {
+      branch <- params.get("splat") if repository.branchList.contains(branch)
+      br <- getBranches(
+        repository.owner,
+        repository.name,
+        repository.repository.defaultBranch,
+        repository.repository.originUserName.isEmpty
+      ).find(_.name == branch)
+    } yield {
+      val protection = getProtectedBranchInfo(repository.owner, repository.name, branch)
+      JsonFormat(
+        ApiBranch(branch, ApiBranchCommit(br.commitId), ApiBranchProtection(protection))(RepositoryName(repository))
+      )
+    }) getOrElse NotFound()
+  })
+
+  /*
+   * iii. Get branch protection
+   * https://developer.github.com/v3/repos/branches/#get-branch-protection
+   */
+
+  /*
+   * iv. Update branch protection
+   * https://developer.github.com/v3/repos/branches/#update-branch-protection
+   */
+
+  /*
+   * v. Remove branch protection
+   * https://developer.github.com/v3/repos/branches/#remove-branch-protection
+   */
+
+  /*
+   * vi. Get required status checks of protected branch
+   * https://developer.github.com/v3/repos/branches/#get-required-status-checks-of-protected-branch
+   */
+
+  /*
+   * vii. Update required status checks of protected branch
+   * https://developer.github.com/v3/repos/branches/#update-required-status-checks-of-protected-branch
+   */
+
+  /*
+   * viii. Remove required status checks of protected branch
+   * https://developer.github.com/v3/repos/branches/#remove-required-status-checks-of-protected-branch
+   */
+
+  /*
+   * ix. List required status checks contexts of protected branch
+   * https://developer.github.com/v3/repos/branches/#list-required-status-checks-contexts-of-protected-branch
+   */
+
+  /*
+   * x. Replace required status checks contexts of protected branch
+   * https://developer.github.com/v3/repos/branches/#replace-required-status-checks-contexts-of-protected-branch
+   */
+
+  /*
+   * xi. Add required status checks contexts of protected branch
+   * https://developer.github.com/v3/repos/branches/#remove-required-status-checks-contexts-of-protected-branch
+   */
+
+  /*
+   * xii. Remove required status checks contexts of protected branch
+   * https://developer.github.com/v3/repos/branches/#remove-required-status-checks-contexts-of-protected-branch
+   */
+
+  /*
+   * xiii. Get pull request review enforcement of protected branch
+   * https://developer.github.com/v3/repos/branches/#get-pull-request-review-enforcement-of-protected-branch
+   */
+
+  /*
+   * xiv. Update pull request review enforcement of protected branch
+   * https://developer.github.com/v3/repos/branches/#update-pull-request-review-enforcement-of-protected-branch
+   */
+
+  /*
+   * xv. Remove pull request review enforcement of protected branch
+   * https://developer.github.com/v3/repos/branches/#remove-pull-request-review-enforcement-of-protected-branch
+   */
+
+  /*
+   * xvi. Get required signatures of protected branch
+   * https://developer.github.com/v3/repos/branches/#get-required-signatures-of-protected-branch
+   */
+
+  /*
+   * xvii. Add required signatures of protected branch
+   * https://developer.github.com/v3/repos/branches/#add-required-signatures-of-protected-branch
+   */
+
+  /*
+   * xviii. Remove required signatures of protected branch
+   * https://developer.github.com/v3/repos/branches/#remove-required-signatures-of-protected-branch
+   */
+
+  /*
+   * xix. Get admin enforcement of protected branch
+   * https://developer.github.com/v3/repos/branches/#get-admin-enforcement-of-protected-branch
+   */
+
+  /*
+   * xx. Add admin enforcement of protected branch
+   * https://developer.github.com/v3/repos/branches/#add-admin-enforcement-of-protected-branch
+   */
+
+  /*
+   * xxi. Remove admin enforcement of protected branch
+   * https://developer.github.com/v3/repos/branches/#remove-admin-enforcement-of-protected-branch
+   */
+
+  /*
+   * xxii. Get restrictions of protected branch
+   * https://developer.github.com/v3/repos/branches/#get-restrictions-of-protected-branch
+   */
+
+  /*
+   * xxiii. Remove restrictions of protected branch
+   * https://developer.github.com/v3/repos/branches/#remove-restrictions-of-protected-branch
+   */
+
+  /*
+   * xxiv. List team restrictions of protected branch
+   * https://developer.github.com/v3/repos/branches/#list-team-restrictions-of-protected-branch
+   */
+
+  /*
+   * xxv. Replace team restrictions of protected branch
+   * https://developer.github.com/v3/repos/branches/#replace-team-restrictions-of-protected-branch
+   */
+
+  /*
+   * xxvi. Add team restrictions of protected branch
+   * https://developer.github.com/v3/repos/branches/#add-team-restrictions-of-protected-branch
+   */
+
+  /*
+   * xxvii. Remove team restrictions of protected branch
+   * https://developer.github.com/v3/repos/branches/#remove-team-restrictions-of-protected-branch
+   */
+
+  /*
+   * xxviii. List user restrictions of protected branch
+   * https://developer.github.com/v3/repos/branches/#list-user-restrictions-of-protected-branch
+   */
+
+  /*
+   * xxix. Replace user restrictions of protected branch
+   * https://developer.github.com/v3/repos/branches/#replace-user-restrictions-of-protected-branch
+   */
+
+  /*
+   * xxx. Add user restrictions of protected branch
+   * https://developer.github.com/v3/repos/branches/#add-user-restrictions-of-protected-branch
+   */
+
+  /*
+   * xxxi. Remove user restrictions of protected branch
+   * https://developer.github.com/v3/repos/branches/#remove-user-restrictions-of-protected-branch
+   */
+
+  /**
+   * Enabling and disabling branch protection: deprecated?
+   * https://developer.github.com/v3/repos/#enabling-and-disabling-branch-protection
+   */
+  patch("/api/v3/repos/:owner/:repository/branches/*")(ownerOnly { repository =>
+    import gitbucket.core.api._
+    (for {
+      branch <- params.get("splat") if repository.branchList.contains(branch)
+      protection <- extractFromJsonBody[ApiBranchProtection.EnablingAndDisabling].map(_.protection)
+      br <- getBranches(
+        repository.owner,
+        repository.name,
+        repository.repository.defaultBranch,
+        repository.repository.originUserName.isEmpty
+      ).find(_.name == branch)
+    } yield {
+      if (protection.enabled) {
+        enableBranchProtection(
+          repository.owner,
+          repository.name,
+          branch,
+          protection.status.enforcement_level == ApiBranchProtection.Everyone,
+          protection.status.contexts
+        )
+      } else {
+        disableBranchProtection(repository.owner, repository.name, branch)
+      }
+      JsonFormat(ApiBranch(branch, ApiBranchCommit(br.commitId), protection)(RepositoryName(repository)))
+    }) getOrElse NotFound()
+  })
+}
diff --git a/src/main/scala/gitbucket/core/controller/api/ApiRepositoryCollaboratorControllerBase.scala b/src/main/scala/gitbucket/core/controller/api/ApiRepositoryCollaboratorControllerBase.scala
new file mode 100644
index 0000000..402b7a3
--- /dev/null
+++ b/src/main/scala/gitbucket/core/controller/api/ApiRepositoryCollaboratorControllerBase.scala
@@ -0,0 +1,40 @@
+package gitbucket.core.controller.api
+import gitbucket.core.api.{ApiUser, JsonFormat}
+import gitbucket.core.controller.ControllerBase
+import gitbucket.core.service.{AccountService, RepositoryService}
+import gitbucket.core.util.Implicits._
+import gitbucket.core.util.ReferrerAuthenticator
+
+trait ApiRepositoryCollaboratorControllerBase extends ControllerBase {
+  self: RepositoryService with AccountService with ReferrerAuthenticator =>
+
+  /*
+   * i. List collaborators
+   * https://developer.github.com/v3/repos/collaborators/#list-collaborators
+   */
+  get("/api/v3/repos/:owner/:repository/collaborators")(referrersOnly { repository =>
+    // TODO Should ApiUser take permission? getCollaboratorUserNames does not return owner group members.
+    JsonFormat(
+      getCollaboratorUserNames(params("owner"), params("repository")).map(u => ApiUser(getAccountByUserName(u).get))
+    )
+  })
+  /*
+   * ii. Check if a user is a collaborator
+   * https://developer.github.com/v3/repos/collaborators/#check-if-a-user-is-a-collaborator
+   */
+
+  /*
+   * iii. Review a user's permission level
+   * https://developer.github.com/v3/repos/collaborators/#review-a-users-permission-level
+   */
+
+  /*
+   * iv. Add user as a collaborator
+   * https://developer.github.com/v3/repos/collaborators/#add-user-as-a-collaborator
+   */
+
+  /*
+ * v. Remove user as a collaborator
+ * https://developer.github.com/v3/repos/collaborators/#remove-user-as-a-collaborator
+ */
+}
diff --git a/src/main/scala/gitbucket/core/controller/api/ApiRepositoryCommitControllerBase.scala b/src/main/scala/gitbucket/core/controller/api/ApiRepositoryCommitControllerBase.scala
new file mode 100644
index 0000000..5455f9c
--- /dev/null
+++ b/src/main/scala/gitbucket/core/controller/api/ApiRepositoryCommitControllerBase.scala
@@ -0,0 +1,85 @@
+package gitbucket.core.controller.api
+import gitbucket.core.api.{ApiCommits, JsonFormat}
+import gitbucket.core.controller.ControllerBase
+import gitbucket.core.model.Account
+import gitbucket.core.service.{AccountService, CommitsService}
+import gitbucket.core.util.Directory.getRepositoryDir
+import gitbucket.core.util.Implicits._
+import gitbucket.core.util.JGitUtil.CommitInfo
+import gitbucket.core.util.{JGitUtil, ReferrerAuthenticator, RepositoryName}
+import gitbucket.core.util.SyntaxSugars.using
+import org.eclipse.jgit.api.Git
+import org.eclipse.jgit.revwalk.RevWalk
+
+trait ApiRepositoryCommitControllerBase extends ControllerBase {
+  self: AccountService with CommitsService with ReferrerAuthenticator =>
+  /*
+   * i. List commits on a repository
+   * https://developer.github.com/v3/repos/commits/#list-commits-on-a-repository
+   */
+
+  /*
+   * ii. Get a single commit
+   * https://developer.github.com/v3/repos/commits/#get-a-single-commit
+   */
+  get("/api/v3/repos/:owner/:repository/commits/:sha")(referrersOnly { repository =>
+    val owner = repository.owner
+    val name = repository.name
+    val sha = params("sha")
+
+    using(Git.open(getRepositoryDir(owner, name))) {
+      git =>
+        val repo = git.getRepository
+        val objectId = repo.resolve(sha)
+        val commitInfo = using(new RevWalk(repo)) { revWalk =>
+          new CommitInfo(revWalk.parseCommit(objectId))
+        }
+
+        JsonFormat(
+          ApiCommits(
+            repositoryName = RepositoryName(repository),
+            commitInfo = commitInfo,
+            diffs = JGitUtil.getDiffs(git, commitInfo.parents.headOption, commitInfo.id, false, true),
+            author = getAccount(commitInfo.authorName, commitInfo.authorEmailAddress),
+            committer = getAccount(commitInfo.committerName, commitInfo.committerEmailAddress),
+            commentCount = getCommitComment(repository.owner, repository.name, sha).size
+          )
+        )
+    }
+  })
+
+  private def getAccount(userName: String, email: String): Account = {
+    getAccountByMailAddress(email).getOrElse {
+      Account(
+        userName = userName,
+        fullName = userName,
+        mailAddress = email,
+        password = "xxx",
+        isAdmin = false,
+        url = None,
+        registeredDate = new java.util.Date(),
+        updatedDate = new java.util.Date(),
+        lastLoginDate = None,
+        image = None,
+        isGroupAccount = false,
+        isRemoved = true,
+        description = None
+      )
+    }
+  }
+
+  /*
+   * iii. Get the SHA-1 of a commit reference
+   * https://developer.github.com/v3/repos/commits/#get-the-sha-1-of-a-commit-reference
+   */
+
+  /*
+   * iv. Compare two commits
+   * https://developer.github.com/v3/repos/commits/#compare-two-commits
+   */
+
+  /*
+ * v. Commit signature verification
+ * https://developer.github.com/v3/repos/commits/#commit-signature-verification
+ */
+}
diff --git a/src/main/scala/gitbucket/core/controller/api/ApiRepositoryContentsControllerBase.scala b/src/main/scala/gitbucket/core/controller/api/ApiRepositoryContentsControllerBase.scala
new file mode 100644
index 0000000..c1d128b
--- /dev/null
+++ b/src/main/scala/gitbucket/core/controller/api/ApiRepositoryContentsControllerBase.scala
@@ -0,0 +1,123 @@
+package gitbucket.core.controller.api
+import gitbucket.core.api.{ApiContents, JsonFormat}
+import gitbucket.core.controller.ControllerBase
+import gitbucket.core.service.{AccountService, ProtectedBranchService, RepositoryService}
+import gitbucket.core.util.Directory.getRepositoryDir
+import gitbucket.core.util.JGitUtil.{FileInfo, getContentFromId, getFileList}
+import gitbucket.core.util._
+import gitbucket.core.util.SyntaxSugars.using
+import gitbucket.core.view.helpers.{isRenderable, renderMarkup}
+import gitbucket.core.util.Implicits._
+import org.eclipse.jgit.api.Git
+
+trait ApiRepositoryContentsControllerBase extends ControllerBase {
+  self: ReferrerAuthenticator =>
+
+  /*
+   * i. Get the README
+   * https://developer.github.com/v3/repos/contents/#get-the-readme
+   */
+
+  /**
+   * ii. Get contents
+   * https://developer.github.com/v3/repos/contents/#get-contents
+   */
+  get("/api/v3/repos/:owner/:repository/contents")(referrersOnly { repository =>
+    getContents(repository, ".", params.getOrElse("ref", repository.repository.defaultBranch))
+  })
+
+  /**
+   * ii. Get contents
+   * https://developer.github.com/v3/repos/contents/#get-contents
+   */
+  get("/api/v3/repos/:owner/:repository/contents/*")(referrersOnly { repository =>
+    getContents(repository, multiParams("splat").head, params.getOrElse("ref", repository.repository.defaultBranch))
+  })
+
+  private def getContents(repository: RepositoryService.RepositoryInfo, path: String, refStr: String) = {
+    def getFileInfo(git: Git, revision: String, pathStr: String): Option[FileInfo] = {
+      val (dirName, fileName) = pathStr.lastIndexOf('/') match {
+        case -1 =>
+          (".", pathStr)
+        case n =>
+          (pathStr.take(n), pathStr.drop(n + 1))
+      }
+      getFileList(git, revision, dirName).find(f => f.name.equals(fileName))
+    }
+
+    using(Git.open(getRepositoryDir(params("owner"), params("repository")))) { git =>
+      val fileList = getFileList(git, refStr, path)
+      if (fileList.isEmpty) { // file or NotFound
+        getFileInfo(git, refStr, path)
+          .flatMap { f =>
+            val largeFile = params.get("large_file").exists(s => s.equals("true"))
+            val content = getContentFromId(git, f.id, largeFile)
+            request.getHeader("Accept") match {
+              case "application/vnd.github.v3.raw" => {
+                contentType = "application/vnd.github.v3.raw"
+                content
+              }
+              case "application/vnd.github.v3.html" if isRenderable(f.name) => {
+                contentType = "application/vnd.github.v3.html"
+                content.map { c =>
+                  List(
+                    "<div data-path=\"",
+                    path,
+                    "\" id=\"file\">",
+                    "<article>",
+                    renderMarkup(path.split("/").toList, new String(c), refStr, repository, false, false, true).body,
+                    "</article>",
+                    "</div>"
+                  ).mkString
+                }
+              }
+              case "application/vnd.github.v3.html" => {
+                contentType = "application/vnd.github.v3.html"
+                content.map { c =>
+                  List(
+                    "<div data-path=\"",
+                    path,
+                    "\" id=\"file\">",
+                    "<div class=\"plain\">",
+                    "<pre>",
+                    play.twirl.api.HtmlFormat.escape(new String(c)).body,
+                    "</pre>",
+                    "</div>",
+                    "</div>"
+                  ).mkString
+                }
+              }
+              case _ =>
+                Some(JsonFormat(ApiContents(f, RepositoryName(repository), content)))
+            }
+          }
+          .getOrElse(NotFound())
+
+      } else { // directory
+        JsonFormat(fileList.map { f =>
+          ApiContents(f, RepositoryName(repository), None)
+        })
+      }
+    }
+  }
+  /*
+   * iii. Create a file
+   * https://developer.github.com/v3/repos/contents/#create-a-file
+   */
+
+  /*
+   * iv. Update a file
+   * https://developer.github.com/v3/repos/contents/#update-a-file
+   */
+
+  /*
+   * v. Delete a file
+   * https://developer.github.com/v3/repos/contents/#delete-a-file
+   */
+
+  /*
+ * vi. Get archive link
+ * https://developer.github.com/v3/repos/contents/#get-archive-link
+ */
+
+}
diff --git a/src/main/scala/gitbucket/core/controller/api/ApiRepositoryControllerBase.scala b/src/main/scala/gitbucket/core/controller/api/ApiRepositoryControllerBase.scala
new file mode 100644
index 0000000..5c4b13d
--- /dev/null
+++ b/src/main/scala/gitbucket/core/controller/api/ApiRepositoryControllerBase.scala
@@ -0,0 +1,204 @@
+package gitbucket.core.controller.api
+import gitbucket.core.api._
+import gitbucket.core.controller.ControllerBase
+import gitbucket.core.service.{AccountService, RepositoryCreationService, RepositoryService}
+import gitbucket.core.servlet.Database
+import gitbucket.core.util.Directory.getRepositoryDir
+import gitbucket.core.util._
+import gitbucket.core.util.Implicits._
+import gitbucket.core.util.SyntaxSugars.using
+import gitbucket.core.model.Profile.profile.blockingApi._
+import org.eclipse.jgit.api.Git
+
+import scala.concurrent.Await
+import scala.concurrent.duration.Duration
+
+trait ApiRepositoryControllerBase extends ControllerBase {
+  self: RepositoryService
+    with RepositoryCreationService
+    with AccountService
+    with OwnerAuthenticator
+    with UsersAuthenticator
+    with GroupManagerAuthenticator
+    with ReferrerAuthenticator
+    with ReadableUsersAuthenticator
+    with WritableUsersAuthenticator =>
+
+  /**
+   * i. List your repositories
+   * https://developer.github.com/v3/repos/#list-your-repositories
+   */
+  get("/api/v3/user/repos")(usersOnly {
+    JsonFormat(getVisibleRepositories(context.loginAccount, Option(context.loginAccount.get.userName)).map { r =>
+      ApiRepository(r, getAccountByUserName(r.owner).get)
+    })
+  })
+
+  /**
+   * ii. List user repositories
+   * https://developer.github.com/v3/repos/#list-user-repositories
+   */
+  get("/api/v3/users/:userName/repos") {
+    JsonFormat(getVisibleRepositories(context.loginAccount, Some(params("userName"))).map { r =>
+      ApiRepository(r, getAccountByUserName(r.owner).get)
+    })
+  }
+
+  /**
+   * iii. List organization repositories
+   * https://developer.github.com/v3/repos/#list-organization-repositories
+   */
+  get("/api/v3/orgs/:orgName/repos") {
+    JsonFormat(getVisibleRepositories(context.loginAccount, Some(params("orgName"))).map { r =>
+      ApiRepository(r, getAccountByUserName(r.owner).get)
+    })
+  }
+
+  /*
+   * iv. List all public repositories
+   * https://developer.github.com/v3/repos/#list-all-public-repositories
+   * Not implemented
+   */
+
+  /*
+   * v. Create
+   * https://developer.github.com/v3/repos/#create
+   * Implemented with two methods (user/orgs)
+   */
+
+  /**
+   * Create user repository
+   * https://developer.github.com/v3/repos/#create
+   */
+  post("/api/v3/user/repos")(usersOnly {
+    val owner = context.loginAccount.get.userName
+    (for {
+      data <- extractFromJsonBody[CreateARepository] if data.isValid
+    } yield {
+      LockUtil.lock(s"${owner}/${data.name}") {
+        if (getRepository(owner, data.name).isEmpty) {
+          val f = createRepository(
+            context.loginAccount.get,
+            owner,
+            data.name,
+            data.description,
+            data.`private`,
+            data.auto_init
+          )
+          Await.result(f, Duration.Inf)
+
+          val repository = Database() withTransaction { session =>
+            getRepository(owner, data.name)(session).get
+          }
+          JsonFormat(ApiRepository(repository, ApiUser(getAccountByUserName(owner).get)))
+        } else {
+          ApiError(
+            "A repository with this name already exists on this account",
+            Some("https://developer.github.com/v3/repos/#create")
+          )
+        }
+      }
+    }) getOrElse NotFound()
+  })
+
+  /**
+   * Create group repository
+   * https://developer.github.com/v3/repos/#create
+   */
+  post("/api/v3/orgs/:org/repos")(managersOnly {
+    val groupName = params("org")
+    (for {
+      data <- extractFromJsonBody[CreateARepository] if data.isValid
+    } yield {
+      LockUtil.lock(s"${groupName}/${data.name}") {
+        if (getRepository(groupName, data.name).isEmpty) {
+          val f = createRepository(
+            context.loginAccount.get,
+            groupName,
+            data.name,
+            data.description,
+            data.`private`,
+            data.auto_init
+          )
+          Await.result(f, Duration.Inf)
+          val repository = Database() withTransaction { session =>
+            getRepository(groupName, data.name).get
+          }
+          JsonFormat(ApiRepository(repository, ApiUser(getAccountByUserName(groupName).get)))
+        } else {
+          ApiError(
+            "A repository with this name already exists for this group",
+            Some("https://developer.github.com/v3/repos/#create")
+          )
+        }
+      }
+    }) getOrElse NotFound()
+  })
+
+  /*
+   * vi. Get
+   * https://developer.github.com/v3/repos/#get
+   */
+  get("/api/v3/repos/:owner/:repository")(referrersOnly { repository =>
+    JsonFormat(ApiRepository(repository, ApiUser(getAccountByUserName(repository.owner).get)))
+  })
+
+  /*
+   * vii. Edit
+   * https://developer.github.com/v3/repos/#edit
+   */
+
+  /*
+   * viii. List all topics for a repository
+   * https://developer.github.com/v3/repos/#list-all-topics-for-a-repository
+   */
+
+  /*
+   * ix. Replace all topics for a repository
+   * https://developer.github.com/v3/repos/#replace-all-topics-for-a-repository
+   */
+
+  /*
+   * x. List contributors
+   * https://developer.github.com/v3/repos/#list-contributors
+   */
+
+  /*
+   * xi. List languages
+   * https://developer.github.com/v3/repos/#list-languages
+   */
+
+  /*
+   * xii. List teams
+   * https://developer.github.com/v3/repos/#list-teams
+   */
+
+  /*
+   * xiii. List tags
+   * https://developer.github.com/v3/repos/#list-tags
+   */
+
+  /*
+   * xiv. Delete a repository
+   * https://developer.github.com/v3/repos/#delete-a-repository
+   */
+
+  /*
+   * xv. Transfer a repository
+   * https://developer.github.com/v3/repos/#transfer-a-repository
+   */
+
+  /**
+   * non-GitHub compatible API for Jenkins-Plugin
+   */
+  get("/api/v3/repos/:owner/:repository/raw/*")(referrersOnly { repository =>
+    val (id, path) = repository.splitPath(multiParams("splat").head)
+    using(Git.open(getRepositoryDir(repository.owner, repository.name))) { git =>
+      val revCommit = JGitUtil.getRevCommitFromId(git, git.getRepository.resolve(id))
+
+      getPathObjectId(git, path, revCommit).map { objectId =>
+        responseRawFile(git, objectId, path, repository)
+      } getOrElse NotFound()
+    }
+  })
+}
diff --git a/src/main/scala/gitbucket/core/controller/api/ApiRepositoryStatusControllerBase.scala b/src/main/scala/gitbucket/core/controller/api/ApiRepositoryStatusControllerBase.scala
new file mode 100644
index 0000000..787acda
--- /dev/null
+++ b/src/main/scala/gitbucket/core/controller/api/ApiRepositoryStatusControllerBase.scala
@@ -0,0 +1,80 @@
+package gitbucket.core.controller.api
+import gitbucket.core.api._
+import gitbucket.core.controller.ControllerBase
+import gitbucket.core.model.CommitState
+import gitbucket.core.service.{AccountService, CommitStatusService}
+import gitbucket.core.util.Implicits._
+import gitbucket.core.util.{JGitUtil, ReferrerAuthenticator, WritableUsersAuthenticator}
+
+trait ApiRepositoryStatusControllerBase extends ControllerBase {
+  self: AccountService with CommitStatusService with ReferrerAuthenticator with WritableUsersAuthenticator =>
+
+  /*
+   * i. Create a status
+   * https://developer.github.com/v3/repos/statuses/#create-a-status
+   */
+  post("/api/v3/repos/:owner/:repository/statuses/:sha")(writableUsersOnly { repository =>
+    (for {
+      ref <- params.get("sha")
+      sha <- JGitUtil.getShaByRef(repository.owner, repository.name, ref)
+      data <- extractFromJsonBody[CreateAStatus] if data.isValid
+      creator <- context.loginAccount
+      state <- CommitState.valueOf(data.state)
+      statusId = createCommitStatus(
+        repository.owner,
+        repository.name,
+        sha,
+        data.context.getOrElse("default"),
+        state,
+        data.target_url,
+        data.description,
+        new java.util.Date(),
+        creator
+      )
+      status <- getCommitStatus(repository.owner, repository.name, statusId)
+    } yield {
+      JsonFormat(ApiCommitStatus(status, ApiUser(creator)))
+    }) getOrElse NotFound()
+  })
+
+  /*
+   * ii. List statuses for a specific ref
+   * https://developer.github.com/v3/repos/statuses/#list-statuses-for-a-specific-ref
+   * ref is Ref to list the statuses from. It can be a SHA, a branch name, or a tag name.
+   */
+  val listStatusesRoute = get("/api/v3/repos/:owner/:repository/commits/:ref/statuses")(referrersOnly { repository =>
+    (for {
+      ref <- params.get("ref")
+      sha <- JGitUtil.getShaByRef(repository.owner, repository.name, ref)
+    } yield {
+      JsonFormat(getCommitStatuesWithCreator(repository.owner, repository.name, sha).map {
+        case (status, creator) =>
+          ApiCommitStatus(status, ApiUser(creator))
+      })
+    }) getOrElse NotFound()
+  })
+
+  /**
+   * https://developer.github.com/v3/repos/statuses/#list-statuses-for-a-specific-ref
+   * legacy route
+   */
+  get("/api/v3/repos/:owner/:repository/statuses/:ref") {
+    listStatusesRoute.action()
+  }
+
+  /*
+   * iii. Get the combined status for a specific ref
+   * https://developer.github.com/v3/repos/statuses/#get-the-combined-status-for-a-specific-ref
+   * ref is Ref to list the statuses from. It can be a SHA, a branch name, or a tag name.
+   */
+  get("/api/v3/repos/:owner/:repository/commits/:ref/status")(referrersOnly { repository =>
+    (for {
+      ref <- params.get("ref")
+      owner <- getAccountByUserName(repository.owner)
+      sha <- JGitUtil.getShaByRef(repository.owner, repository.name, ref)
+    } yield {
+      val statuses = getCommitStatuesWithCreator(repository.owner, repository.name, sha)
+      JsonFormat(ApiCombinedCommitStatus(sha, statuses, ApiRepository(repository, owner)))
+    }) getOrElse NotFound()
+  })
+}
diff --git a/src/main/scala/gitbucket/core/controller/api/ApiUserControllerBase.scala b/src/main/scala/gitbucket/core/controller/api/ApiUserControllerBase.scala
new file mode 100644
index 0000000..7c596fd
--- /dev/null
+++ b/src/main/scala/gitbucket/core/controller/api/ApiUserControllerBase.scala
@@ -0,0 +1,46 @@
+package gitbucket.core.controller.api
+import gitbucket.core.api.{ApiUser, JsonFormat}
+import gitbucket.core.controller.ControllerBase
+import gitbucket.core.service.{AccountService, RepositoryService}
+import gitbucket.core.util.Implicits._
+
+trait ApiUserControllerBase extends ControllerBase {
+  self: RepositoryService with AccountService =>
+
+  /**
+   * i. Get a single user
+   * https://developer.github.com/v3/users/#get-a-single-user
+   * This API also returns group information (as GitHub).
+   */
+  get("/api/v3/users/:userName") {
+    getAccountByUserName(params("userName")).map { account =>
+      JsonFormat(ApiUser(account))
+    } getOrElse NotFound()
+  }
+
+  /**
+   * ii. Get the authenticated user
+   * https://developer.github.com/v3/users/#get-the-authenticated-user
+   */
+  get("/api/v3/user") {
+    context.loginAccount.map { account =>
+      JsonFormat(ApiUser(account))
+    } getOrElse Unauthorized()
+  }
+
+  /*
+   * iii. Update the authenticated user
+   * https://developer.github.com/v3/users/#update-the-authenticated-user
+   */
+
+  /*
+   * iv. Get contextual information about a user
+   * https://developer.github.com/v3/users/#get-contextual-information-about-a-user
+   */
+
+  /*
+ * v. Get all users
+ * https://developer.github.com/v3/users/#get-all-users
+ */
+
+}