(refs #464)Add new extension point to add buttons

src/main/scala/app/IssuesController.scala

@@ -9,6 +9,7 @@ import util.Implicits._
 import util.ControlUtil._
 import org.scalatra.Ok
 import model.Issue
+import plugin.PluginSystem
 
 class IssuesController extends IssuesControllerBase
   with IssuesService with RepositoryService with AccountService with LabelsService with MilestonesService with ActivityService
@@ -396,7 +397,8 @@ trait IssuesControllerBase extends ControllerBase {
           condition,
           filter,
           repository,
-          hasWritePermission(owner, repoName, context.loginAccount))
+          hasWritePermission(owner, repoName, context.loginAccount),
+          PluginSystem.buttons("issues"))
     }
   }
 

src/main/scala/plugin/Plugin.scala

@@ -14,6 +14,7 @@ trait Plugin {
   def globalMenus           : List[GlobalMenu]
   def repositoryActions     : List[RepositoryAction]
   def globalActions         : List[Action]
+  def buttons(name: String) : List[Button]
 }
 
 object PluginConnectionHolder {

src/main/scala/plugin/PluginSystem.scala

@@ -85,6 +85,7 @@ object PluginSystem {
   def globalMenus           : List[GlobalMenu]       = pluginsMap.values.flatMap(_.globalMenus).toList
   def repositoryActions     : List[RepositoryAction] = pluginsMap.values.flatMap(_.repositoryActions).toList
   def globalActions         : List[Action]           = pluginsMap.values.flatMap(_.globalActions).toList
+  def buttons(name: String) : List[Button]           = pluginsMap.values.flatMap(_.buttons(name)).toList
 
   // Case classes to hold plug-ins information internally in GitBucket
   case class PluginRepository(id: String, url: String)
@@ -92,6 +93,7 @@ object PluginSystem {
   case class RepositoryMenu(label: String, name: String, url: String, icon: String, condition: Context => Boolean)
   case class Action(path: String, function: (HttpServletRequest, HttpServletResponse) => Any)
   case class RepositoryAction(path: String, function: (HttpServletRequest, HttpServletResponse, RepositoryInfo) => Any)
+  case class Button(label: String, href: String)
 
   /**
    * Checks whether the plugin is updatable.

src/main/scala/plugin/ScalaPlugin.scala

@@ -1,10 +1,9 @@
 package plugin
 
 import scala.collection.mutable.ListBuffer
+import scala.collection.mutable.{Map => MutableMap}
 import javax.servlet.http.{HttpServletResponse, HttpServletRequest}
-import plugin.PluginSystem.GlobalMenu
-import plugin.PluginSystem.Action
-import plugin.PluginSystem.RepositoryAction
+import plugin.PluginSystem._
 import app.Context
 import plugin.PluginSystem.RepositoryMenu
 import service.RepositoryService.RepositoryInfo
@@ -19,11 +18,13 @@ class ScalaPlugin(val id: String, val version: String,
   private val globalMenuList       = ListBuffer[GlobalMenu]()
   private val repositoryActionList = ListBuffer[RepositoryAction]()
   private val globalActionList     = ListBuffer[Action]()
+  private val buttonMap            = MutableMap[String, ListBuffer[Button]]()
 
   def repositoryMenus       : List[RepositoryMenu]   = repositoryMenuList.toList
   def globalMenus           : List[GlobalMenu]       = globalMenuList.toList
   def repositoryActions     : List[RepositoryAction] = repositoryActionList.toList
   def globalActions         : List[Action]           = globalActionList.toList
+  def buttons(name: String) : List[Button]           = buttonMap.get(name).map(_.toList).getOrElse(Nil)
 
   def addRepositoryMenu(label: String, name: String, url: String, icon: String)(condition: (Context) => Boolean): Unit = {
     repositoryMenuList += RepositoryMenu(label, name, url, icon, condition)
@@ -41,6 +42,14 @@ class ScalaPlugin(val id: String, val version: String,
     repositoryActionList += RepositoryAction(path, function)
   }
 
+  def addButton(name: String, label: String, href: String): Unit = {
+    if(!buttonMap.contains(name)){
+      buttonMap.put(name, ListBuffer[Button]())
+    }
+    val list = buttonMap(name)
+    list += Button(label, href)
+  }
+
 }
 
 object ScalaPlugin {

src/main/twirl/issues/list.scala.html

@@ -12,12 +12,13 @@
   condition: service.IssuesService.IssueSearchCondition,
   filter: String,
   repository: service.RepositoryService.RepositoryInfo,
-  hasWritePermission: Boolean)(implicit context: app.Context)
+  hasWritePermission: Boolean,
+  buttons: List[plugin.PluginSystem.Button])(implicit context: app.Context)
 @import context._
 @import view.helpers._
 @html.main(s"Issues - ${repository.owner}/${repository.name}", Some(repository)){
   @html.menu("issues", repository){
-    @tab("issues", false, repository)
+    @tab("issues", false, repository, buttons)
     <div class="row-fluid">
       <div class="span3">
         <ul class="nav nav-pills nav-stacked">

src/main/twirl/issues/tab.scala.html

@@ -1,4 +1,5 @@
-@(active: String, create: Boolean, repository: service.RepositoryService.RepositoryInfo)(implicit context: app.Context)
+@(active: String, create: Boolean, repository: service.RepositoryService.RepositoryInfo,
+  buttons: List[plugin.PluginSystem.Button] = Nil)(implicit context: app.Context)
 @import context._
 @import view.helpers._
 <ul class="nav nav-tabs pull-left fill-width">
@@ -7,6 +8,9 @@
   @if(loginAccount.isDefined){
   <li class="pull-right">
     <div class="btn-group">
+      @buttons.map { button =>
+        <a class="btn btn-small" href="@button.href">@button.label</a>
+      }
       @if(create){
         <a class="btn btn-small btn-success" href="#" disabled="disabled">New Issue</a>
       } else {