move some milestone functions to a standalone package (#8213)

services/milestone/milestone.go

@@ -0,0 +1,59 @@
+// Copyright 2019 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package models
+
+import (
+	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/modules/log"
+	api "code.gitea.io/gitea/modules/structs"
+)
+
+// ChangeMilestoneAssign changes assignment of milestone for issue.
+func ChangeMilestoneAssign(issue *models.Issue, doer *models.User, oldMilestoneID int64) (err error) {
+	if err = models.ChangeMilestoneAssign(issue, doer, oldMilestoneID); err != nil {
+		return
+	}
+
+	var hookAction api.HookIssueAction
+	if issue.MilestoneID > 0 {
+		hookAction = api.HookIssueMilestoned
+	} else {
+		hookAction = api.HookIssueDemilestoned
+	}
+
+	if err = issue.LoadAttributes(); err != nil {
+		return err
+	}
+
+	mode, _ := models.AccessLevel(doer, issue.Repo)
+	if issue.IsPull {
+		err = issue.PullRequest.LoadIssue()
+		if err != nil {
+			log.Error("LoadIssue: %v", err)
+			return
+		}
+		err = models.PrepareWebhooks(issue.Repo, models.HookEventPullRequest, &api.PullRequestPayload{
+			Action:      hookAction,
+			Index:       issue.Index,
+			PullRequest: issue.PullRequest.APIFormat(),
+			Repository:  issue.Repo.APIFormat(mode),
+			Sender:      doer.APIFormat(),
+		})
+	} else {
+		err = models.PrepareWebhooks(issue.Repo, models.HookEventIssues, &api.IssuePayload{
+			Action:     hookAction,
+			Index:      issue.Index,
+			Issue:      issue.APIFormat(),
+			Repository: issue.Repo.APIFormat(mode),
+			Sender:     doer.APIFormat(),
+		})
+	}
+	if err != nil {
+		log.Error("PrepareWebhooks [is_pull: %v]: %v", issue.IsPull, err)
+	} else {
+		go models.HookQueue.Add(issue.RepoID)
+	}
+	return nil
+}