add html_url and comments_url on api issue

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

@@ -1,6 +1,7 @@
 package gitbucket.core.api
 
 import gitbucket.core.model.Issue
+import gitbucket.core.util.RepositoryName
 
 import java.util.Date
 
@@ -16,10 +17,13 @@ case class ApiIssue(
   state: String,
   created_at: Date,
   updated_at: Date,
-  body: String)
+  body: String)(repositoryName: RepositoryName){
+  val comments_url = ApiPath(s"/api/v3/repos/${repositoryName.fullName}/issues/${number}/comments")
+  val html_url = ApiPath(s"/${repositoryName.fullName}/issues/${number}")
+}
 
 object ApiIssue{
-  def apply(issue: Issue, user: ApiUser): ApiIssue =
+  def apply(issue: Issue, repositoryName: RepositoryName, user: ApiUser): ApiIssue =
     ApiIssue(
       number = issue.issueId,
       title  = issue.title,
@@ -27,5 +31,5 @@ object ApiIssue{
       state  = if(issue.closed){ "closed" }else{ "open" },
       body   = issue.content.getOrElse(""),
       created_at = issue.registeredDate,
-      updated_at = issue.updatedDate)
+      updated_at = issue.updatedDate)(repositoryName)
 }

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

@@ -23,7 +23,7 @@ object JsonFormat {
   ) + FieldSerializer[ApiUser]() + FieldSerializer[ApiPullRequest]() + FieldSerializer[ApiRepository]() +
     FieldSerializer[ApiCommitListItem.Parent]() + FieldSerializer[ApiCommitListItem]() + FieldSerializer[ApiCommitListItem.Commit]() +
     FieldSerializer[ApiCommitStatus]() + FieldSerializer[ApiCommit]() + FieldSerializer[ApiCombinedCommitStatus]() +
-    FieldSerializer[ApiPullRequest.Commit]()
+    FieldSerializer[ApiPullRequest.Commit]() + FieldSerializer[ApiIssue]()
 
 
   def apiPathSerializer(c: Context) = new CustomSerializer[ApiPath](format =>

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

@@ -90,7 +90,7 @@ trait WebHookPullRequestService extends WebHookService {
           action       = action,
           number       = issue.issueId,
           repository   = ApiRepository(repository, ApiUser(repoOwner)),
-          issue        = ApiIssue(issue, ApiUser(issueUser)),
+          issue        = ApiIssue(issue, RepositoryName(repository), ApiUser(issueUser)),
           sender       = ApiUser(sender))
       }
     }
@@ -272,7 +272,7 @@ object WebHookService {
       WebHookIssueCommentPayload(
         action       = "created",
         repository   = ApiRepository(repository, repositoryUser),
-        issue        = ApiIssue(issue, ApiUser(issueUser)),
+        issue        = ApiIssue(issue, RepositoryName(repository), ApiUser(issueUser)),
         comment      = ApiComment(comment, ApiUser(commentUser)),
         sender       = ApiUser(sender))
   }

src/test/scala/gitbucket/core/api/JsonFormatSpec.scala

@@ -157,13 +157,15 @@ class JsonFormatSpec extends Specification {
       state  = "open",
       body   = "I'm having a problem with this.",
       created_at = date1,
-      updated_at = date1)
+      updated_at = date1)(RepositoryName("octocat","Hello-World"))
   val apiIssueJson = s"""{
     "number": 1347,
     "state": "open",
     "title": "Found a bug",
     "body": "I'm having a problem with this.",
     "user": $apiUserJson,
+    "comments_url": "${context.baseUrl}/api/v3/repos/octocat/Hello-World/issues/1347/comments",
+    "html_url": "${context.baseUrl}/octocat/Hello-World/issues/1347",
     "created_at": "2011-04-14T16:00:49Z",
     "updated_at": "2011-04-14T16:00:49Z"
   }"""