Add issue completion (#2513)

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

@@ -417,6 +417,28 @@ trait IssuesControllerBase extends ControllerBase {
     }) getOrElse NotFound()
   })
 
+  /**
+   * JSON API for issue and PR completion.
+   */
+  ajaxGet("/:owner/:repository/_issue/proposals")(writableUsersOnly { repository =>
+    contentType = formats("json")
+    org.json4s.jackson.Serialization.write(
+      Map(
+        "options" -> (
+          getOpenIssues(repository.owner, repository.name)
+            .map { t =>
+              Map(
+                "label" -> s"""${if (t.isPullRequest) "<i class='octicon octicon-git-pull-request'></i>"
+                else "<i class='octicon octicon-issue-opened'></i>"}<b> #${StringUtil
+                  .escapeHtml(t.issueId.toString)} ${StringUtil.escapeHtml(t.title)}</b>""",
+                "value" -> t.issueId.toString
+              )
+            }
+        )
+      )
+    )
+  })
+
   val assignedUserName = (key: String) => params.get(key) filter (_.trim != "")
   val milestoneId: String => Option[Int] = (key: String) => params.get(key).flatMap(_.toIntOpt)
   val priorityId: String => Option[Int] = (key: String) => params.get(key).flatMap(_.toIntOpt)

src/main/scala/gitbucket/core/plugin/PluginRegistry.scala

@@ -57,6 +57,7 @@ class PluginRegistry {
   private val textDecorators = new ConcurrentLinkedQueue[TextDecorator]
   private val suggestionProviders = new ConcurrentLinkedQueue[SuggestionProvider]
   suggestionProviders.add(new UserNameSuggestionProvider())
+  suggestionProviders.add(new IssueSuggestionProvider())
   private val sshCommandProviders = new ConcurrentLinkedQueue[PartialFunction[String, Command]]()
 
   def addPlugin(pluginInfo: PluginInfo): Unit = plugins.add(pluginInfo)

src/main/scala/gitbucket/core/plugin/SuggestionProvider.scala

@@ -91,7 +91,7 @@ trait SuggestionProvider {
    * If this suggestion provider needs some additional process to assemble the proposal list (e.g. It need to use Ajax
    * to get a proposal list from the server), then override this method and return any JavaScript code.
    */
-  def additionalScript(implicit context: Context): String = ""
+  def additionalScript(repository: RepositoryInfo)(implicit context: Context): String = ""
 
 }
 
@@ -99,6 +99,14 @@ class UserNameSuggestionProvider extends SuggestionProvider {
   override val id: String = "user"
   override val prefix: String = "@"
   override val context: Seq[String] = Seq("issues")
-  override def additionalScript(implicit context: Context): String =
+  override def additionalScript(repository: RepositoryInfo)(implicit context: Context): String =
     s"""$$.get('${context.path}/_user/proposals', { query: '', user: true, group: false }, function (data) { user = data.options; });"""
 }
+
+class IssueSuggestionProvider extends SuggestionProvider {
+  override val id: String = "issue"
+  override val prefix: String = "#"
+  override val context: Seq[String] = Seq("issues")
+  override def additionalScript(repository: RepositoryInfo)(implicit context: Context): String =
+    s"""$$.get('${context.path}/${repository.owner}/${repository.name}/_issue/proposals', function (data) { issue = data.options; });"""
+}

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

@@ -31,6 +31,9 @@ trait IssuesService {
       Issues filter (_.byPrimaryKey(owner, repository, issueId.toInt)) firstOption
     else None
 
+  def getOpenIssues(owner: String, repository: String)(implicit s: Session): List[Issue] =
+    Issues filter (_.byRepository(owner, repository)) filterNot (_.closed) sortBy (_.issueId desc) list
+
   def getComments(owner: String, repository: String, issueId: Int)(implicit s: Session) =
     IssueComments filter (_.byIssue(owner, repository, issueId)) sortBy (_.commentId asc) list
 

src/main/twirl/gitbucket/core/helper/attached.scala.html

@@ -14,7 +14,7 @@ $(function(){
       var @provider.id = @Html(helpers.json(provider.options(repository).map { case (value, label) =>
         Map("value" -> value, "label" -> label)
       }));
-      @Html(provider.additionalScript)
+      @Html(provider.additionalScript(repository))
     }
   }
   $('#@textareaId').textcomplete([