Implement "conversation lock" for issue comments (#5073)

models/issue_lock.go

@@ -0,0 +1,51 @@
+// 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
+
+// IssueLockOptions defines options for locking and/or unlocking an issue/PR
+type IssueLockOptions struct {
+	Doer   *User
+	Issue  *Issue
+	Reason string
+}
+
+// LockIssue locks an issue. This would limit commenting abilities to
+// users with write access to the repo
+func LockIssue(opts *IssueLockOptions) error {
+	return updateIssueLock(opts, true)
+}
+
+// UnlockIssue unlocks a previously locked issue.
+func UnlockIssue(opts *IssueLockOptions) error {
+	return updateIssueLock(opts, false)
+}
+
+func updateIssueLock(opts *IssueLockOptions, lock bool) error {
+	if opts.Issue.IsLocked == lock {
+		return nil
+	}
+
+	opts.Issue.IsLocked = lock
+
+	var commentType CommentType
+	if opts.Issue.IsLocked {
+		commentType = CommentTypeLock
+	} else {
+		commentType = CommentTypeUnlock
+	}
+
+	if err := UpdateIssueCols(opts.Issue, "is_locked"); err != nil {
+		return err
+	}
+
+	_, err := CreateComment(&CreateCommentOptions{
+		Doer:    opts.Doer,
+		Issue:   opts.Issue,
+		Repo:    opts.Issue.Repo,
+		Type:    commentType,
+		Content: opts.Reason,
+	})
+	return err
+}