add protected-branch feature on pull-request page

* show commit-status if context is require status checks to pass.
  * disable merge if new commit-id has not `commit-status` ok on `Status-checkes`.
  * if some status includes required is not success, merge button is disabled.
  * if any required status is success, and some status not includes required, merge button is active, but button color is white.
  * if any required status is success, merge button is active, and button color is green.

src/main/scala/gitbucket/core/api/ApiBranchProtection.scala

@@ -12,16 +12,26 @@ object ApiBranchProtection{
   /** form for enabling-and-disabling-branch-protection */
   case class EnablingAndDisabling(protection: ApiBranchProtection)
 
-  def apply(info: Option[ProtectedBrancheService.ProtectedBranchInfo]): ApiBranchProtection = info match {
+  def apply(info: ProtectedBrancheService.ProtectedBranchInfo): ApiBranchProtection = ApiBranchProtection(
-    case None       => ApiBranchProtection(false, Some(statusNone))
+    enabled = info.enabled,
-    case Some(info) => ApiBranchProtection(true, Some(Status(if(info.includeAdministrators){ Everyone }else{ NonAdmins }, info.requireStatusChecksToPass)))
+    required_status_checks = Some(Status(EnforcementLevel(info.enabled, info.includeAdministrators), info.contexts)))
-  }
   val statusNone = Status(Off, Seq.empty)
   case class Status(enforcement_level: EnforcementLevel, contexts: Seq[String])
   sealed class EnforcementLevel(val name: String)
   case object Off extends EnforcementLevel("off")
   case object NonAdmins extends EnforcementLevel("non_admins")
   case object Everyone extends EnforcementLevel("everyone")
+  object EnforcementLevel {
+    def apply(enabled: Boolean, includeAdministrators: Boolean): EnforcementLevel = if(enabled){
+      if(includeAdministrators){
+        Everyone
+      }else{
+        NonAdmins
+      }
+    }else{
+      Off
+    }
+  }
 
   implicit val enforcementLevelSerializer = new CustomSerializer[EnforcementLevel](format => (
    {

src/main/scala/gitbucket/core/controller/PullRequestsController.scala

@@ -27,13 +27,13 @@ import scala.collection.JavaConverters._
 class PullRequestsController extends PullRequestsControllerBase
   with RepositoryService with AccountService with IssuesService with PullRequestService with MilestonesService with LabelsService
   with CommitsService with ActivityService with WebHookPullRequestService with ReferrerAuthenticator with CollaboratorsAuthenticator
-  with CommitStatusService with MergeService
+  with CommitStatusService with MergeService with ProtectedBrancheService
 
 
 trait PullRequestsControllerBase extends ControllerBase {
   self: RepositoryService with AccountService with IssuesService with MilestonesService with LabelsService
     with CommitsService with ActivityService with PullRequestService with WebHookPullRequestService with ReferrerAuthenticator with CollaboratorsAuthenticator
-    with CommitStatusService with MergeService =>
+    with CommitStatusService with MergeService with ProtectedBrancheService =>
 
   private val logger = LoggerFactory.getLogger(classOf[PullRequestsControllerBase])
 
@@ -171,17 +171,21 @@ trait PullRequestsControllerBase extends ControllerBase {
       val owner = repository.owner
       val name  = repository.name
       getPullRequest(owner, name, issueId) map { case(issue, pullreq) =>
-        val statuses = getCommitStatues(owner, name, pullreq.commitIdTo)
+        val branchProtection = getProtectedBranchInfo(owner, name, pullreq.branch)
+        val statuses = branchProtection.withRequireStatues(getCommitStatues(owner, name, pullreq.commitIdTo))
         val hasConfrict = LockUtil.lock(s"${owner}/${name}"){
           checkConflict(owner, name, pullreq.branch, issueId)
         }
-        val hasProblem = hasConfrict || (!statuses.isEmpty && CommitState.combine(statuses.map(_.state).toSet) != CommitState.SUCCESS)
+        val hasRequiredStatusProblem = branchProtection.hasProblem(statuses, pullreq.commitIdTo, context.loginAccount.get.userName)
+        val hasProblem = hasRequiredStatusProblem || hasConfrict || (!statuses.isEmpty && CommitState.combine(statuses.map(_.state).toSet) != CommitState.SUCCESS)
         html.mergeguide(
           hasConfrict,
           hasProblem,
           issue,
           pullreq,
           statuses,
+          branchProtection,
+          hasRequiredStatusProblem,
           repository,
           getRepository(pullreq.requestUserName, pullreq.requestRepositoryName, context.baseUrl).get)
       }

src/main/scala/gitbucket/core/service/ProtectedBrancheService.scala

@@ -1,6 +1,6 @@
 package gitbucket.core.service
 
-import gitbucket.core.model.{Collaborator, Repository, Account, CommitState}
+import gitbucket.core.model.{Collaborator, Repository, Account, CommitState, CommitStatus}
 import gitbucket.core.model.Profile._
 import gitbucket.core.util.JGitUtil
 import profile.simple._
@@ -16,14 +16,17 @@ object MockDB{
 
 trait ProtectedBrancheService {
   import ProtectedBrancheService._
-  def getProtectedBranchInfo(owner: String, repository: String, branch: String)(implicit session: Session): Option[ProtectedBranchInfo] = {
+  private def getProtectedBranchInfoOpt(owner: String, repository: String, branch: String)(implicit session: Session): Option[ProtectedBranchInfo] = {
     // TODO: mock
-    MockDB.data.get((owner, repository, branch)).map{ case (includeAdministrators, requireStatusChecksToPass) =>
+    MockDB.data.get((owner, repository, branch)).map{ case (includeAdministrators, contexts) =>
-      new ProtectedBranchInfo(owner, repository, requireStatusChecksToPass, includeAdministrators)
+      new ProtectedBranchInfo(owner, repository, true, contexts, includeAdministrators)
     }
   }
+  def getProtectedBranchInfo(owner: String, repository: String, branch: String)(implicit session: Session): ProtectedBranchInfo = {
+    getProtectedBranchInfoOpt(owner, repository, branch).getOrElse(ProtectedBranchInfo.disabled(owner, repository))
+  }
   def isProtectedBranchNeedStatusCheck(owner: String, repository: String, branch: String, user: String)(implicit session: Session): Boolean =
-    getProtectedBranchInfo(owner, repository, branch).map{a => println(a); a.needStatusCheck(user)}.getOrElse(false)
+    getProtectedBranchInfo(owner, repository, branch).needStatusCheck(user)
   def getProtectedBranchList(owner: String, repository: String)(implicit session: Session): List[String] = {
     // TODO: mock
     MockDB.data.filter{
@@ -31,9 +34,9 @@ trait ProtectedBrancheService {
       case _ => false
     }.map{ case ((_, _, branch), _) => branch }.toList
   }
-  def enableBranchProtection(owner: String, repository: String, branch:String, includeAdministrators: Boolean, requireStatusChecksToPass: Seq[String])(implicit session: Session): Unit = {
+  def enableBranchProtection(owner: String, repository: String, branch:String, includeAdministrators: Boolean, contexts: Seq[String])(implicit session: Session): Unit = {
     // TODO: mock
-    MockDB.data.put((owner, repository, branch), includeAdministrators -> requireStatusChecksToPass)
+    MockDB.data.put((owner, repository, branch), includeAdministrators -> contexts)
   }
   def disableBranchProtection(owner: String, repository: String, branch:String)(implicit session: Session): Unit = {
     // TODO: mock
@@ -43,7 +46,7 @@ trait ProtectedBrancheService {
   def getBranchProtectedReason(owner: String, repository: String, receivePack: ReceivePack, command: ReceiveCommand, pusher: String)(implicit session: Session): Option[String] = {
     val branch = command.getRefName.stripPrefix("refs/heads/")
     if(branch != command.getRefName){
-      getProtectedBranchInfo(owner, repository, branch).flatMap(_.getStopReason(receivePack, command, pusher))
+      getProtectedBranchInfo(owner, repository, branch).getStopReason(receivePack, command, pusher)
     }else{
       None
     }
@@ -53,13 +56,14 @@ object ProtectedBrancheService {
   case class ProtectedBranchInfo(
     owner: String,
     repository: String,
+    enabled: Boolean,
     /**
      * Require status checks to pass before merging
      * Choose which status checks must pass before branches can be merged into test.
      * When enabled, commits must first be pushed to another branch,
      * then merged or pushed directly to test after status checks have passed.
      */
-    requireStatusChecksToPass: Seq[String],
+    contexts: Seq[String],
     /**
      * Include administrators
      * Enforce required status checks for repository administrators.
@@ -74,32 +78,56 @@ object ProtectedBrancheService {
      * Can't have changes merged into them until required status checks pass
      */
     def getStopReason(receivePack: ReceivePack, command: ReceiveCommand, pusher: String)(implicit session: Session): Option[String] = {
+      if(enabled){
         command.getType() match {
           case ReceiveCommand.Type.UPDATE|ReceiveCommand.Type.UPDATE_NONFASTFORWARD if receivePack.isAllowNonFastForwards =>
             Some("Cannot force-push to a protected branch")
           case ReceiveCommand.Type.UPDATE|ReceiveCommand.Type.UPDATE_NONFASTFORWARD if needStatusCheck(pusher) =>
             unSuccessedContexts(command.getNewId.name) match {
               case s if s.size == 1 => Some(s"""Required status check "${s.toSeq(0)}" is expected""")
-            case s if s.size >= 1 => Some(s"${s.size} of ${requireStatusChecksToPass.size} required status checks are expected")
+              case s if s.size >= 1 => Some(s"${s.size} of ${contexts.size} required status checks are expected")
               case _ => None
             }
           case ReceiveCommand.Type.DELETE =>
             Some("Cannot delete a protected branch")
           case _ => None
         }
+      }else{
+        None
       }
-    def unSuccessedContexts(sha1: String)(implicit session: Session): Set[String] = if(requireStatusChecksToPass.isEmpty){
+    }
+    def unSuccessedContexts(sha1: String)(implicit session: Session): Set[String] = if(contexts.isEmpty){
       Set.empty
     } else {
-      requireStatusChecksToPass.toSet -- getCommitStatues(owner, repository, sha1).filter(_.state == CommitState.SUCCESS).map(_.context).toSet
+      contexts.toSet -- getCommitStatues(owner, repository, sha1).filter(_.state == CommitState.SUCCESS).map(_.context).toSet
     }
     def needStatusCheck(pusher: String)(implicit session: Session): Boolean =
-      if(requireStatusChecksToPass.isEmpty){
+      if(!enabled || contexts.isEmpty){
         false
       }else if(includeAdministrators){
         true
       }else{
         !isAdministrator(pusher)
       }
+    def withRequireStatues(statuses: List[CommitStatus]): List[CommitStatus] = {
+      statuses ++ (contexts.toSet -- statuses.map(_.context).toSet).map{ context => CommitStatus(
+        commitStatusId = 0,
+        userName = owner,
+        repositoryName = repository,
+        commitId = "",
+        context = context,
+        state = CommitState.PENDING,
+        targetUrl = None,
+        description = Some("Waiting for status to be reported"),
+        creator = "",
+        registeredDate = new java.util.Date(),
+        updatedDate = new java.util.Date())
+      }
+    }
+    def hasProblem(statuses: List[CommitStatus], sha1: String, account: String)(implicit session: Session): Boolean =
+      needStatusCheck(account) && contexts.exists(context => statuses.find(_.context == context).map(_.state) != Some(CommitState.SUCCESS))
+  }
+  object ProtectedBranchInfo{
+    def disabled(owner: String, repository: String): ProtectedBranchInfo = ProtectedBranchInfo(owner, repository, false, Nil, false)
   }
 }

src/main/scala/gitbucket/core/view/helpers.scala

@@ -288,10 +288,10 @@ object helpers extends AvatarImageProvider with LinkConverter with RequestCache
   }
 
   def commitStateIcon(state: CommitState) = Html(state match {
-    case CommitState.PENDING => "●"
+    case CommitState.PENDING => """<i style="color:inherit;width:inherit;height:inherit" class="octicon octicon-primitive-dot"></i>"""
-    case CommitState.SUCCESS => "&#x2714;"
+    case CommitState.SUCCESS => """<i style="color:inherit;width:inherit;height:inherit" class="octicon octicon-check"></i>"""
-    case CommitState.ERROR   => "×"
+    case CommitState.ERROR   => """<i style="color:inherit;width:inherit;height:inherit" class="octicon octicon-x"></i>"""
-    case CommitState.FAILURE => "×"
+    case CommitState.FAILURE => """<i style="color:inherit;width:inherit;height:inherit" class="octicon octicon-x"></i>"""
   })
 
   def commitStateText(state: CommitState, commitId:String) = state match {

src/main/twirl/gitbucket/core/pulls/mergeguide.scala.html

@@ -3,6 +3,8 @@
   issue: gitbucket.core.model.Issue,
   pullreq: gitbucket.core.model.PullRequest,
   statuses: List[model.CommitStatus],
+  branchProtection: gitbucket.core.service.ProtectedBrancheService.ProtectedBranchInfo,
+  hasRequiredStatusProblem: Boolean,
   originRepository: gitbucket.core.service.RepositoryService.RepositoryInfo,
   forkedRepository: gitbucket.core.service.RepositoryService.RepositoryInfo)(implicit context: gitbucket.core.controller.Context)
 @import gitbucket.core.service.SystemSettingsService
@@ -14,19 +16,9 @@
     <div id="merge-pull-request">
       @if(!statuses.isEmpty){
         <div class="build-statuses">
-          @if(statuses.size==1){
-            @defining(statuses.head){ status =>
-            <div class="build-status-item">
-              @status.targetUrl.map{ url => <a class="pull-right" href="@url">Details</a> }
-              <span class="build-status-icon text-@{status.state.name}">@commitStateIcon(status.state)</span>
-              <strong class="text-@{status.state.name}">@commitStateText(status.state, pullreq.commitIdTo)</strong>
-              @status.description.map{ desc => <span class="muted">— @desc</span> }
-            </div>
-            }
-          } else {
           @defining(statuses.groupBy(_.state)){ stateMap =>
             @defining(CommitState.combine(stateMap.keySet)){ state =>
-                <div class="build-status-item">
+              <div class="build-status-item-header">
                 <a class="pull-right" id="toggle-all-checks"></a>
                 <span class="build-status-icon text-@{state.name}">@commitStateIcon(state)</span>
                 <strong class="text-@{state.name}">@commitStateText(state, pullreq.commitIdTo)</strong>
@@ -35,16 +27,18 @@
               <div class="build-statuses-list" style="@if(state==CommitState.SUCCESS){ display:none; }else{ }">
                 @statuses.map{ status =>
                 <div class="build-status-item">
-                    @status.targetUrl.map{ url => <a class="pull-right" href="@url">Details</a> }
+                  <div class="pull-right">
+                    @branchProtection.contexts.find(_==status.context).map{ url => <span class="label">Required</span> }
+                    @status.targetUrl.map{ url => <a href="@url">Details</a> }
+                  </div>
                   <span class="build-status-icon text-@{status.state.name}">@commitStateIcon(status.state)</span>
-                    <span class="text-@{status.state.name}">@status.context</span>
+                  <strong>@status.context</strong>
                   @status.description.map{ desc => <span class="muted">— @desc</span> }
                 </div>
                 }
               </div>
             }
           }
-          }
         </div>
       }
       <div class="pull-right">
@@ -52,23 +46,29 @@
       </div>
       <div>
         @if(hasConflict){
-          <span class="strong">We can’t automatically merge this pull request.</span>
+          <div class="merge-indicator merge-indicator-alert"><span class="octicon octicon-alert"></span></div>
-        } else {
+          <span class="strong">This branch has conflicts that must be resolved</span>
-          @if(hasProblem){
-            <span class="strong">Merge with caution!</span>
-          } else {
-            <span class="strong">This pull request can be automatically merged.</span>
-          }
-        }
-      </div>
           <div class="small">
-        @if(hasConflict){
+            <a href="#" class="show-command-line">Use the command line</a> to resolve conflicts before continuing.
-          <a href="#" id="show-command-line">Use the command line</a> to resolve conflicts before continuing.
-        } else {
-          You can also merge branches on the <a href="#" id="show-command-line">command line</a>.
-        }
           </div>
-      <div id="command-line" style="display: none;">
+        } else { @if(hasRequiredStatusProblem) {
+          <div class="merge-indicator merge-indicator-warning"><span class="octicon octicon-primitive-dot"></span></div>
+          <span class="strong">Required statuses must pass before merging.</span>
+          <div class="small">
+            All required status checks on this pull request must run successfully to enable automatic merging.
+          </div>
+        } else {
+          <div class="merge-indicator merge-indicator-success"><span class="octicon octicon-check"></span></div>
+          <span class="strong">Merging can be performed automatically.</span>
+          <div class="small">
+            Merging can be performed automatically.
+          </div>
+        } }
+      </div>
+      <div style="padding:15px;border-top:solid 1px #e5e5e5;background:#fafafa">
+        <input type="button" class="btn @if(!hasProblem){ btn-success }" id="merge-pull-request-button" value="Merge pull request"@if(hasConflict||hasRequiredStatusProblem){ disabled="true"}/>
+        You can also merge branches on the <a href="#" class="show-command-line">command line</a>.
+        <div id="command-line" style="display: none;margin-top: 15px;">
           <hr>
           @if(hasConflict){
             <span class="strong">Checkout via command line</span>
@@ -116,6 +116,7 @@
           </div>
         </div>
       </div>
+    </div>
     <div id="confirm-merge-form" style="display: none;">
       <form method="POST" action="@url(originRepository)/pull/@pullreq.issueId/merge">
         <div class="strong">
@@ -134,8 +135,8 @@
 
 <script>
 $(function(){
-  $('#show-command-line').click(function(){
+  $('.show-command-line').click(function(){
-    $('#command-line').show();
+    $('#command-line').toggle();
     return false;
   });
   function setToggleAllChecksLabel(){

src/main/webapp/assets/common/css/gitbucket.css

@@ -1405,13 +1405,43 @@ div.author-info div.committer {
   margin: -10px -10px 10px -10px;
 }
 .build-statuses .build-status-item{
-  padding: 10px 15px 10px 12px;
+  padding: 10px 15px 10px 64px;
   border-bottom: 1px solid #eee;
 }
 .build-statuses-list .build-status-item{
   background-color: #fafafa;
 }
 
+.merge-indicator{
+  float:left;
+  border-radius: 50%;
+  width: 30px;
+  height: 30px;
+  line-height: 30px;
+  text-align: center;
+  vertical-align: middle;
+  margin-right: 10px;
+}
+.merge-indicator-success{
+  background-color: #6cc644;
+}
+.merge-indicator-warning{
+  background-color: #cea61b;
+}
+.merge-indicator-alert{
+  background-color: #888;
+}
+.merge-indicator .octicon{
+  color: white;
+  font-size: 16px;
+  width: 15px;
+  height: 15px;
+}
+.merge-indicator-warning .octicon{
+  color: white;
+  font-size: 30px;
+}
+
 /****************************************************************************/
 /* Diff */
 /****************************************************************************/