feat(pierre): sanity check

internal/gitadapters/gitea/adapter.go

@@ -3,6 +3,7 @@ package gitea
 import (
 	"bytes"
 	"context"
+	"fmt"
 	"io"
 
 	"code.gitea.io/sdk/gitea"
@@ -47,3 +48,28 @@ func (g *Adapter) AddComment(ctx context.Context, owner, repo string, prID int,
 	_, _, err := g.client.CreatePullReview(owner, repo, int64(prID), opts)
 	return err
 }
+
+// GetFileContent returns the file content at a given path and ref (commit SHA).
+func (g *Adapter) GetFileContent(ctx context.Context, owner, repo, path, ref string) (string, error) {
+	g.client.SetContext(ctx)
+	// The SDK's GetFile returns the raw bytes of the file.
+	data, _, err := g.client.GetFile(owner, repo, ref, path)
+	if err != nil {
+		return "", err
+	}
+	return string(data), nil
+}
+
+// GetPRHeadSHA fetches the pull request and returns the head commit SHA.
+func (g *Adapter) GetPRHeadSHA(ctx context.Context, owner, repo string, prID int) (string, error) {
+	g.client.SetContext(ctx)
+	// GetPullRequest returns the detailed PR information.
+	pr, _, err := g.client.GetPullRequest(owner, repo, int64(prID))
+	if err != nil {
+		return "", err
+	}
+	if pr == nil || pr.Head == nil {
+		return "", fmt.Errorf("pull request %d has no head information", prID)
+	}
+	return pr.Head.Sha, nil
+}