1 files changed, 55 insertions, 0 deletions
diff --git a/services/repository/commit.go b/services/repository/commit.go
new file mode 100644
index 0000000..e8c0262
--- /dev/null
+++ b/services/repository/commit.go
@@ -0,0 +1,55 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package repository
+
+import (
+	"context"
+	"fmt"
+
+	"code.gitea.io/gitea/modules/util"
+	gitea_ctx "code.gitea.io/gitea/services/context"
+)
+
+type ContainedLinks struct { // TODO: better name?
+	Branches      []*namedLink `json:"branches"`
+	Tags          []*namedLink `json:"tags"`
+	DefaultBranch string       `json:"default_branch"`
+}
+
+type namedLink struct { // TODO: better name?
+	Name    string `json:"name"`
+	WebLink string `json:"web_link"`
+}
+
+// LoadBranchesAndTags creates a new repository branch
+func LoadBranchesAndTags(ctx context.Context, baseRepo *gitea_ctx.Repository, commitSHA string) (*ContainedLinks, error) {
+	containedTags, err := baseRepo.GitRepo.ListOccurrences(ctx, "tag", commitSHA)
+	if err != nil {
+		return nil, fmt.Errorf("encountered a problem while querying %s: %w", "tags", err)
+	}
+	containedBranches, err := baseRepo.GitRepo.ListOccurrences(ctx, "branch", commitSHA)
+	if err != nil {
+		return nil, fmt.Errorf("encountered a problem while querying %s: %w", "branches", err)
+	}
+
+	result := &ContainedLinks{
+		DefaultBranch: baseRepo.Repository.DefaultBranch,
+		Branches:      make([]*namedLink, 0, len(containedBranches)),
+		Tags:          make([]*namedLink, 0, len(containedTags)),
+	}
+	for _, tag := range containedTags {
+		// TODO: Use a common method to get the link to a branch/tag instead of hard-coding it here
+		result.Tags = append(result.Tags, &namedLink{
+			Name:    tag,
+			WebLink: fmt.Sprintf("%s/src/tag/%s", baseRepo.RepoLink, util.PathEscapeSegments(tag)),
+		})
+	}
+	for _, branch := range containedBranches {
+		result.Branches = append(result.Branches, &namedLink{
+			Name:    branch,
+			WebLink: fmt.Sprintf("%s/src/branch/%s", baseRepo.RepoLink, util.PathEscapeSegments(branch)),
+		})
+	}
+	return result, nil
+}