1 files changed, 136 insertions, 0 deletions
diff --git a/services/issue/comments.go b/services/issue/comments.go
new file mode 100644
index 0000000..3ab577b
--- /dev/null
+++ b/services/issue/comments.go
@@ -0,0 +1,136 @@
+// Copyright 2019 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package issue
+
+import (
+	"context"
+	"fmt"
+
+	"code.gitea.io/gitea/models/db"
+	issues_model "code.gitea.io/gitea/models/issues"
+	repo_model "code.gitea.io/gitea/models/repo"
+	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/timeutil"
+	notify_service "code.gitea.io/gitea/services/notify"
+)
+
+// CreateRefComment creates a commit reference comment to issue.
+func CreateRefComment(ctx context.Context, doer *user_model.User, repo *repo_model.Repository, issue *issues_model.Issue, content, commitSHA string) error {
+	if len(commitSHA) == 0 {
+		return fmt.Errorf("cannot create reference with empty commit SHA")
+	}
+
+	// Check if same reference from same commit has already existed.
+	has, err := db.GetEngine(ctx).Get(&issues_model.Comment{
+		Type:      issues_model.CommentTypeCommitRef,
+		IssueID:   issue.ID,
+		CommitSHA: commitSHA,
+	})
+	if err != nil {
+		return fmt.Errorf("check reference comment: %w", err)
+	} else if has {
+		return nil
+	}
+
+	_, err = issues_model.CreateComment(ctx, &issues_model.CreateCommentOptions{
+		Type:      issues_model.CommentTypeCommitRef,
+		Doer:      doer,
+		Repo:      repo,
+		Issue:     issue,
+		CommitSHA: commitSHA,
+		Content:   content,
+	})
+	return err
+}
+
+// CreateIssueComment creates a plain issue comment.
+func CreateIssueComment(ctx context.Context, doer *user_model.User, repo *repo_model.Repository, issue *issues_model.Issue, content string, attachments []string) (*issues_model.Comment, error) {
+	// Check if doer is blocked by the poster of the issue or by the owner of the repository.
+	if user_model.IsBlockedMultiple(ctx, []int64{issue.PosterID, repo.OwnerID}, doer.ID) {
+		return nil, user_model.ErrBlockedByUser
+	}
+
+	comment, err := issues_model.CreateComment(ctx, &issues_model.CreateCommentOptions{
+		Type:        issues_model.CommentTypeComment,
+		Doer:        doer,
+		Repo:        repo,
+		Issue:       issue,
+		Content:     content,
+		Attachments: attachments,
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	mentions, err := issues_model.FindAndUpdateIssueMentions(ctx, issue, doer, comment.Content)
+	if err != nil {
+		return nil, err
+	}
+
+	notify_service.CreateIssueComment(ctx, doer, repo, issue, comment, mentions)
+
+	return comment, nil
+}
+
+// UpdateComment updates information of comment.
+func UpdateComment(ctx context.Context, c *issues_model.Comment, contentVersion int, doer *user_model.User, oldContent string) error {
+	if err := c.LoadReview(ctx); err != nil {
+		return err
+	}
+	isPartOfPendingReview := c.Review != nil && c.Review.Type == issues_model.ReviewTypePending
+
+	needsContentHistory := c.Content != oldContent && c.Type.HasContentSupport() && !isPartOfPendingReview
+	if needsContentHistory {
+		hasContentHistory, err := issues_model.HasIssueContentHistory(ctx, c.IssueID, c.ID)
+		if err != nil {
+			return err
+		}
+		if !hasContentHistory {
+			if err = issues_model.SaveIssueContentHistory(ctx, c.PosterID, c.IssueID, c.ID,
+				c.CreatedUnix, oldContent, true); err != nil {
+				return err
+			}
+		}
+	}
+
+	if err := issues_model.UpdateComment(ctx, c, contentVersion, doer); err != nil {
+		return err
+	}
+
+	if needsContentHistory {
+		historyDate := timeutil.TimeStampNow()
+		if c.Issue.NoAutoTime {
+			historyDate = c.Issue.UpdatedUnix
+		}
+		err := issues_model.SaveIssueContentHistory(ctx, doer.ID, c.IssueID, c.ID, historyDate, c.Content, false)
+		if err != nil {
+			return err
+		}
+	}
+
+	if !isPartOfPendingReview {
+		notify_service.UpdateComment(ctx, doer, c, oldContent)
+	}
+
+	return nil
+}
+
+// DeleteComment deletes the comment
+func DeleteComment(ctx context.Context, doer *user_model.User, comment *issues_model.Comment) error {
+	err := db.WithTx(ctx, func(ctx context.Context) error {
+		return issues_model.DeleteComment(ctx, comment)
+	})
+	if err != nil {
+		return err
+	}
+
+	if err := comment.LoadReview(ctx); err != nil {
+		return err
+	}
+	if comment.Review == nil || comment.Review.Type != issues_model.ReviewTypePending {
+		notify_service.DeleteComment(ctx, doer, comment)
+	}
+
+	return nil
+}