Move issue label operations to issue service package (#8553)

* Move issue label operations to issue service package

* fix test

* fix fmt

3 files changed, 165 insertions, 0 deletions

diff --git a/services/issue/label.go b/services/issue/label.go
index 4af8c2b97e..b393e5d38c 100644
--- a/services/issue/label.go
+++ b/services/issue/label.go
@@ -6,9 +6,57 @@ package issue
 
 import (
 	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/notification"
+	api "code.gitea.io/gitea/modules/structs"
 )
 
+func sendLabelUpdatedWebhook(issue *models.Issue, doer *models.User) {
+	var err error
+
+	if err = issue.LoadRepo(); err != nil {
+		log.Error("LoadRepo: %v", err)
+		return
+	}
+
+	if err = issue.LoadPoster(); err != nil {
+		log.Error("LoadPoster: %v", err)
+		return
+	}
+
+	mode, _ := models.AccessLevel(issue.Poster, issue.Repo)
+	if issue.IsPull {
+		if err = issue.LoadPullRequest(); err != nil {
+			log.Error("loadPullRequest: %v", err)
+			return
+		}
+		if err = issue.PullRequest.LoadIssue(); err != nil {
+			log.Error("LoadIssue: %v", err)
+			return
+		}
+		err = models.PrepareWebhooks(issue.Repo, models.HookEventPullRequest, &api.PullRequestPayload{
+			Action:      api.HookIssueLabelUpdated,
+			Index:       issue.Index,
+			PullRequest: issue.PullRequest.APIFormat(),
+			Repository:  issue.Repo.APIFormat(models.AccessModeNone),
+			Sender:      doer.APIFormat(),
+		})
+	} else {
+		err = models.PrepareWebhooks(issue.Repo, models.HookEventIssues, &api.IssuePayload{
+			Action:     api.HookIssueLabelUpdated,
+			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)
+	}
+}
+
 // ClearLabels clears all of an issue's labels
 func ClearLabels(issue *models.Issue, doer *models.User) (err error) {
 	if err = issue.ClearLabels(doer); err != nil {
@@ -19,3 +67,45 @@ func ClearLabels(issue *models.Issue, doer *models.User) (err error) {
 
 	return nil
 }
+
+// AddLabel adds a new label to the issue.
+func AddLabel(issue *models.Issue, doer *models.User, label *models.Label) error {
+	if err := models.NewIssueLabel(issue, label, doer); err != nil {
+		return err
+	}
+
+	sendLabelUpdatedWebhook(issue, doer)
+	return nil
+}
+
+// AddLabels adds a list of new labels to the issue.
+func AddLabels(issue *models.Issue, doer *models.User, labels []*models.Label) error {
+	if err := models.NewIssueLabels(issue, labels, doer); err != nil {
+		return err
+	}
+
+	sendLabelUpdatedWebhook(issue, doer)
+	return nil
+}
+
+// RemoveLabel removes a label from issue by given ID.
+func RemoveLabel(issue *models.Issue, doer *models.User, label *models.Label) error {
+	if err := issue.LoadRepo(); err != nil {
+		return err
+	}
+
+	perm, err := models.GetUserRepoPermission(issue.Repo, doer)
+	if err != nil {
+		return err
+	}
+	if !perm.CanWriteIssuesOrPulls(issue.IsPull) {
+		return models.ErrLabelNotExist{}
+	}
+
+	if err := models.DeleteIssueLabel(issue, label, doer); err != nil {
+		return err
+	}
+
+	sendLabelUpdatedWebhook(issue, doer)
+	return nil
+}
diff --git a/services/issue/label_test.go b/services/issue/label_test.go
new file mode 100644
index 0000000000..0652028943
--- /dev/null
+++ b/services/issue/label_test.go
@@ -0,0 +1,59 @@
+// Copyright 2017 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 issue
+
+import (
+	"testing"
+
+	"code.gitea.io/gitea/models"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestIssue_AddLabels(t *testing.T) {
+	var tests = []struct {
+		issueID  int64
+		labelIDs []int64
+		doerID   int64
+	}{
+		{1, []int64{1, 2}, 2}, // non-pull-request
+		{1, []int64{}, 2},     // non-pull-request, empty
+		{2, []int64{1, 2}, 2}, // pull-request
+		{2, []int64{}, 1},     // pull-request, empty
+	}
+	for _, test := range tests {
+		assert.NoError(t, models.PrepareTestDatabase())
+		issue := models.AssertExistsAndLoadBean(t, &models.Issue{ID: test.issueID}).(*models.Issue)
+		labels := make([]*models.Label, len(test.labelIDs))
+		for i, labelID := range test.labelIDs {
+			labels[i] = models.AssertExistsAndLoadBean(t, &models.Label{ID: labelID}).(*models.Label)
+		}
+		doer := models.AssertExistsAndLoadBean(t, &models.User{ID: test.doerID}).(*models.User)
+		assert.NoError(t, AddLabels(issue, doer, labels))
+		for _, labelID := range test.labelIDs {
+			models.AssertExistsAndLoadBean(t, &models.IssueLabel{IssueID: test.issueID, LabelID: labelID})
+		}
+	}
+}
+
+func TestIssue_AddLabel(t *testing.T) {
+	var tests = []struct {
+		issueID int64
+		labelID int64
+		doerID  int64
+	}{
+		{1, 2, 2}, // non-pull-request, not-already-added label
+		{1, 1, 2}, // non-pull-request, already-added label
+		{2, 2, 2}, // pull-request, not-already-added label
+		{2, 1, 2}, // pull-request, already-added label
+	}
+	for _, test := range tests {
+		assert.NoError(t, models.PrepareTestDatabase())
+		issue := models.AssertExistsAndLoadBean(t, &models.Issue{ID: test.issueID}).(*models.Issue)
+		label := models.AssertExistsAndLoadBean(t, &models.Label{ID: test.labelID}).(*models.Label)
+		doer := models.AssertExistsAndLoadBean(t, &models.User{ID: test.doerID}).(*models.User)
+		assert.NoError(t, AddLabel(issue, doer, label))
+		models.AssertExistsAndLoadBean(t, &models.IssueLabel{IssueID: test.issueID, LabelID: test.labelID})
+	}
+}
diff --git a/services/issue/main_test.go b/services/issue/main_test.go
new file mode 100644
index 0000000000..b056678a42
--- /dev/null
+++ b/services/issue/main_test.go
@@ -0,0 +1,16 @@
+// 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 issue
+
+import (
+	"path/filepath"
+	"testing"
+
+	"code.gitea.io/gitea/models"
+)
+
+func TestMain(m *testing.M) {
+	models.MainTest(m, filepath.Join("..", ".."))
+}