Create issue comment.

src/main/scala/app/IssuesController.scala

@@ -66,11 +66,13 @@ trait IssuesControllerBase extends ControllerBase {
   post("/:owner/:repository/issue_comments")( usersOnly {
     val owner = params("owner")
     val repository = params("repository")
-    val issueId = params("issueId")
-    val content = params("content")
+    val issueId = params("issueId").toInt
+    val content = params("content")	// TODO input check
 
-    // TODO Returns JSON
-    redirect("/%s/%s/issues/%d".format(owner, repository, 1))
+    saveComment(owner, repository, context.loginAccount.get.userName, issueId, content)
+
+    contentType = formats("json")
+    org.json4s.jackson.Serialization.write(Map("content" -> content))
   })
 
 }

src/main/scala/service/IssuesService.scala

@@ -51,4 +51,15 @@ trait IssuesService {
       }.map(_.issueId).update(id) > 0
     } get
 
+  def saveComment(owner: String, repository: String, loginUser: String,
+      issueId: Int, content: String) =
+    IssueComments.autoInc insert (
+        owner,
+        repository,
+        issueId,
+        loginUser,
+        content,
+        currentDate,
+        currentDate)
+
 }