Add "Compare & pull request" button on the top of the repository viewer (#1476)

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

@@ -502,6 +502,27 @@ trait PullRequestsControllerBase extends ControllerBase {
     }
   })
 
+  ajaxGet("/:owner/:repository/pulls/proposals")(readableUsersOnly { repository =>
+    (for {
+      parentUserName <- repository.repository.parentUserName
+      parentRepoName <- repository.repository.parentRepositoryName
+      parentRepository <- getRepository(parentUserName, parentRepoName).orElse(Some(repository))
+    } yield {
+      val branches = JGitUtil.getBranches(
+        owner         = repository.owner,
+        name          = repository.name,
+        defaultBranch = repository.repository.defaultBranch,
+        origin        = repository.repository.originUserName.isEmpty
+      )
+      .filter(x => x.mergeInfo.map(_.ahead).getOrElse(0) > 0 && x.mergeInfo.map(_.behind).getOrElse(0) == 0)
+      .sortBy(br => (br.mergeInfo.isEmpty, br.commitTime))
+      .map(_.name)
+      .reverse
+
+      html.proposals(branches, parentRepository, repository)
+    }).getOrElse(NotFound())
+  })
+
   /**
    * Parses branch identifier and extracts owner and branch name as tuple.
    *

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

@@ -0,0 +1,13 @@
+@(branches: Seq[String],
+  parent: gitbucket.core.service.RepositoryService.RepositoryInfo,
+  repository: gitbucket.core.service.RepositoryService.RepositoryInfo)(implicit context: gitbucket.core.controller.Context)
+@import gitbucket.core.view.helpers
+@if(branches.nonEmpty){
+  @branches.map { branch =>
+    <div class="box-content" style="line-height: 20pt; margin-bottom: 6px; padding: 10px 6px 10px 10px; background-color: #fff9ea">
+      <strong><i class="menu-icon octicon octicon-git-branch"></i><span class="muted">@branch</span></strong>
+      <a class="pull-right btn btn-success" style="position: relative; top: -4px;"
+         href="@helpers.url(repository)/compare/@{parent.owner}:@{parent.repository.defaultBranch}...@{repository.owner}:@{branch}">Compare & pull request</a>
+    </div>
+  }
+}

src/main/twirl/gitbucket/core/repo/files.scala.html

@@ -29,6 +29,7 @@
         </p>
       }
     }
+    <div id="pull-request-area"></div>
     <div class="head" style="height: 24px;">
       <div class="pull-right">
         <div class="btn-group">
@@ -204,6 +205,7 @@
   }
 }
 <script>
+$(function() {
   @repository.sshUrl.map { sshUrl =>
     $('#repository-url-http').click(function(){
       $('#repository-url-proto').text('HTTP');
@@ -219,4 +221,13 @@
       $('#repository-url-copy').attr('data-clipboard-text', $('#repository-url').val());
     });
   }
+
+  @if(pathList.isEmpty && hasWritePermission){
+    $.get('@{helpers.url(repository)}/pulls/proposals', function(res){
+      if(res) {
+        $('#pull-request-area').html(res);
+      }
+    });
+  }
+});
 </script>