From 858178d6878229c0ac413d3ea5a4f799d6114ecb Mon Sep 17 00:00:00 2001
From: nsfisis <nsfisis@gmail.com>
Date: Sun, 7 Dec 2025 18:29:26 +0900
Subject: feat(client): add edit card modal with form validation
MIME-Version: 1.0
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Add EditCardModal component allowing users to edit existing cards.
Includes Edit button on each card in the deck detail page and
comprehensive unit tests.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
---
 src/client/components/EditCardModal.tsx | 210 ++++++++++++++++++++++++++++++++
 1 file changed, 210 insertions(+)
 create mode 100644 src/client/components/EditCardModal.tsx

(limited to 'src/client/components/EditCardModal.tsx')

diff --git a/src/client/components/EditCardModal.tsx b/src/client/components/EditCardModal.tsx
new file mode 100644
index 0000000..2d04581
--- /dev/null
+++ b/src/client/components/EditCardModal.tsx
@@ -0,0 +1,210 @@
+import { type FormEvent, useEffect, useState } from "react";
+import { ApiClientError, apiClient } from "../api";
+
+interface Card {
+	id: string;
+	front: string;
+	back: string;
+}
+
+interface EditCardModalProps {
+	isOpen: boolean;
+	deckId: string;
+	card: Card | null;
+	onClose: () => void;
+	onCardUpdated: () => void;
+}
+
+export function EditCardModal({
+	isOpen,
+	deckId,
+	card,
+	onClose,
+	onCardUpdated,
+}: EditCardModalProps) {
+	const [front, setFront] = useState("");
+	const [back, setBack] = useState("");
+	const [error, setError] = useState<string | null>(null);
+	const [isSubmitting, setIsSubmitting] = useState(false);
+
+	// Sync form state when card changes
+	useEffect(() => {
+		if (card) {
+			setFront(card.front);
+			setBack(card.back);
+			setError(null);
+		}
+	}, [card]);
+
+	const handleClose = () => {
+		setError(null);
+		onClose();
+	};
+
+	const handleSubmit = async (e: FormEvent) => {
+		e.preventDefault();
+		if (!card) return;
+
+		setError(null);
+		setIsSubmitting(true);
+
+		try {
+			const authHeader = apiClient.getAuthHeader();
+			if (!authHeader) {
+				throw new ApiClientError("Not authenticated", 401);
+			}
+
+			const res = await fetch(`/api/decks/${deckId}/cards/${card.id}`, {
+				method: "PUT",
+				headers: {
+					"Content-Type": "application/json",
+					...authHeader,
+				},
+				body: JSON.stringify({
+					front: front.trim(),
+					back: back.trim(),
+				}),
+			});
+
+			if (!res.ok) {
+				const errorBody = await res.json().catch(() => ({}));
+				throw new ApiClientError(
+					(errorBody as { error?: string }).error ||
+						`Request failed with status ${res.status}`,
+					res.status,
+				);
+			}
+
+			onCardUpdated();
+			onClose();
+		} catch (err) {
+			if (err instanceof ApiClientError) {
+				setError(err.message);
+			} else {
+				setError("Failed to update card. Please try again.");
+			}
+		} finally {
+			setIsSubmitting(false);
+		}
+	};
+
+	if (!isOpen || !card) {
+		return null;
+	}
+
+	const isFormValid = front.trim() && back.trim();
+
+	return (
+		<div
+			role="dialog"
+			aria-modal="true"
+			aria-labelledby="edit-card-title"
+			style={{
+				position: "fixed",
+				top: 0,
+				left: 0,
+				right: 0,
+				bottom: 0,
+				backgroundColor: "rgba(0, 0, 0, 0.5)",
+				display: "flex",
+				alignItems: "center",
+				justifyContent: "center",
+				zIndex: 1000,
+			}}
+			onClick={(e) => {
+				if (e.target === e.currentTarget) {
+					handleClose();
+				}
+			}}
+			onKeyDown={(e) => {
+				if (e.key === "Escape") {
+					handleClose();
+				}
+			}}
+		>
+			<div
+				style={{
+					backgroundColor: "white",
+					padding: "1.5rem",
+					borderRadius: "8px",
+					width: "100%",
+					maxWidth: "500px",
+					margin: "1rem",
+				}}
+			>
+				<h2 id="edit-card-title" style={{ marginTop: 0 }}>
+					Edit Card
+				</h2>
+
+				<form onSubmit={handleSubmit}>
+					{error && (
+						<div role="alert" style={{ color: "red", marginBottom: "1rem" }}>
+							{error}
+						</div>
+					)}
+
+					<div style={{ marginBottom: "1rem" }}>
+						<label
+							htmlFor="edit-card-front"
+							style={{ display: "block", marginBottom: "0.25rem" }}
+						>
+							Front
+						</label>
+						<textarea
+							id="edit-card-front"
+							value={front}
+							onChange={(e) => setFront(e.target.value)}
+							required
+							disabled={isSubmitting}
+							rows={3}
+							placeholder="Question or prompt"
+							style={{
+								width: "100%",
+								boxSizing: "border-box",
+								resize: "vertical",
+							}}
+						/>
+					</div>
+
+					<div style={{ marginBottom: "1rem" }}>
+						<label
+							htmlFor="edit-card-back"
+							style={{ display: "block", marginBottom: "0.25rem" }}
+						>
+							Back
+						</label>
+						<textarea
+							id="edit-card-back"
+							value={back}
+							onChange={(e) => setBack(e.target.value)}
+							required
+							disabled={isSubmitting}
+							rows={3}
+							placeholder="Answer or explanation"
+							style={{
+								width: "100%",
+								boxSizing: "border-box",
+								resize: "vertical",
+							}}
+						/>
+					</div>
+
+					<div
+						style={{
+							display: "flex",
+							gap: "0.5rem",
+							justifyContent: "flex-end",
+						}}
+					>
+						<button type="button" onClick={handleClose} disabled={isSubmitting}>
+							Cancel
+						</button>
+						<button type="submit" disabled={isSubmitting || !isFormValid}>
+							{isSubmitting ? "Saving..." : "Save"}
+						</button>
+					</div>
+				</form>
+			</div>
+		</div>
+	);
+}
-- 
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