Add reply to code review (#978)

Follow https://gitea.com/gitea/go-sdk/pulls/784

Reviewed-on: https://gitea.com/gitea/tea/pulls/978

cmd/pulls/review_helpers.go

@@ -5,14 +5,21 @@ package pulls
 
 import (
 	stdctx "context"
+	"errors"
 	"fmt"
+	"io"
 	"strings"
 
 	gitea "gitea.dev/sdk"
 
+	"gitea.dev/tea/modules/config"
 	"gitea.dev/tea/modules/context"
+	"gitea.dev/tea/modules/interact"
 	"gitea.dev/tea/modules/task"
+	"gitea.dev/tea/modules/theme"
 	"gitea.dev/tea/modules/utils"
+
+	"charm.land/huh/v2"
 )
 
 // runPullReview handles the common logic for approving/rejecting pull requests
@@ -60,3 +67,62 @@ func runResolveComment(requestCtx stdctx.Context, ctx *context.TeaContext, actio
 
 	return action(requestCtx, ctx, commentID)
 }
+
+// runPullReviewReply handles replying to a specific review comment on a pull request.
+func runPullReviewReply(requestCtx stdctx.Context, ctx *context.TeaContext) error {
+	if err := ctx.Ensure(context.CtxRequirement{RemoteRepo: true}); err != nil {
+		return err
+	}
+
+	if ctx.Args().Len() < 2 {
+		return fmt.Errorf("pull request index and comment ID are required")
+	}
+
+	idx, err := utils.ArgToIndex(ctx.Args().First())
+	if err != nil {
+		return err
+	}
+
+	commentID, err := utils.ArgToIndex(ctx.Args().Get(1))
+	if err != nil {
+		return err
+	}
+
+	body, err := getCommentBody(ctx, ctx.Args().Slice()[2:], "Reply(markdown):", "reply")
+	if err != nil {
+		return err
+	}
+
+	return task.ReplyToPullReviewComment(requestCtx, ctx, idx, commentID, body)
+}
+
+func getCommentBody(ctx *context.TeaContext, extraArgs []string, promptTitle, noun string) (string, error) {
+	body := strings.Join(extraArgs, " ")
+	if interact.IsStdinPiped() {
+		bodyStdin, err := io.ReadAll(ctx.Reader)
+		if err != nil {
+			return "", err
+		}
+		if len(bodyStdin) != 0 {
+			body = strings.Join([]string{body, string(bodyStdin)}, "\n\n")
+		}
+	} else if len(body) == 0 {
+		if err := huh.NewForm(
+			huh.NewGroup(
+				huh.NewText().
+					Title(promptTitle).
+					ExternalEditor(config.GetPreferences().Editor).
+					EditorExtension("md").
+					Value(&body),
+			),
+		).WithTheme(theme.GetTheme()).Run(); err != nil {
+			return "", err
+		}
+	}
+
+	if len(strings.TrimSpace(body)) == 0 {
+		return "", errors.New("no " + noun + " content provided")
+	}
+
+	return body, nil
+}