Initial addition of the Arcade study feature. Add connections as the first working game.

src/components/arcade/ArcadeImportModal.tsx

@@ -0,0 +1,120 @@
+"use client";
+
+import { useState } from "react";
+import { GenerateTab } from "@/components/import/GenerateTab";
+import type { ArcadeImportBatchPreview } from "@/types/arcade";
+
+export function ArcadeImportModal({
+  classId,
+  onClose,
+  onImported,
+}: {
+  classId: string;
+  onClose: () => void;
+  onImported: () => void;
+}) {
+  const [tab, setTab] = useState<"generate" | "import">("import");
+  const [rawJson, setRawJson] = useState("");
+  const [names, setNames] = useState<string[]>([]);
+  const [preview, setPreview] = useState<ArcadeImportBatchPreview | null>(null);
+  const [error, setError] = useState("");
+  const [details, setDetails] = useState<string[]>([]);
+  const [acknowledged, setAcknowledged] = useState(false);
+  const [busy, setBusy] = useState(false);
+
+  async function previewImport() {
+    setBusy(true);
+    setError("");
+    setDetails([]);
+    setPreview(null);
+    try {
+      const response = await fetch("/api/arcade/import/preview", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ gameType: "connections", rawJson }),
+      });
+      const data = await response.json();
+      if (!response.ok) {
+        setError(data.error ?? "Import preview failed");
+        setDetails(data.details ?? []);
+        return;
+      }
+      setPreview(data);
+      setNames(data.packs.map((pack: { name: string }) => pack.name));
+    } finally {
+      setBusy(false);
+    }
+  }
+
+  async function saveImport() {
+    if (!preview || names.some((name) => !name.trim())) return;
+    setBusy(true);
+    setError("");
+    try {
+      const response = await fetch("/api/arcade/packs", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({
+          classId,
+          gameType: "connections",
+          rawJson,
+          names: names.map((name) => name.trim()),
+          warningsAcknowledged: acknowledged,
+        }),
+      });
+      const data = await response.json();
+      if (!response.ok) {
+        setError(data.error ?? "Import failed");
+        setDetails(data.details ?? []);
+        return;
+      }
+      onImported();
+    } finally {
+      setBusy(false);
+    }
+  }
+
+  return (
+    <div className="fixed inset-0 z-50 flex items-end justify-center sm:items-center sm:p-4">
+      <button className="absolute inset-0 bg-black/45 backdrop-blur-sm" onClick={onClose} aria-label="Close import dialog" />
+      <section role="dialog" aria-modal="true" aria-labelledby="arcade-import-title" className="connections-world connections-import relative flex max-h-[92vh] w-full max-w-2xl flex-col rounded-t-3xl border border-border-light bg-bg-surface shadow-[var(--shadow-modal)] sm:rounded-3xl">
+        <div className="flex items-center justify-between px-6 pt-5">
+          <h2 id="arcade-import-title" className="editorial-title text-2xl text-text-heading">Import Connections pack</h2>
+          <button onClick={onClose} className="grid h-10 w-10 place-items-center rounded-xl text-xl text-text-muted hover:bg-bg-surface-alt" aria-label="Close">×</button>
+        </div>
+        <div className="flex gap-1 border-b border-border-light px-6 pt-4">
+          {(["generate", "import"] as const).map((item) => (
+            <button key={item} onClick={() => setTab(item)} className={`border-b-2 px-4 py-3 text-sm font-bold capitalize ${tab === item ? "border-primary text-primary" : "border-transparent text-text-muted"}`}>{item}</button>
+          ))}
+        </div>
+        <div className="overflow-y-auto p-6">
+          {tab === "generate" ? <GenerateTab importType="connections" /> : (
+            <div className="space-y-4">
+              <p className="text-sm text-text-secondary">Paste one pack object or an array of up to ten packs. Every board is validated before anything is saved.</p>
+              <textarea value={rawJson} onChange={(event) => { setRawJson(event.target.value); setPreview(null); setError(""); }} rows={11} placeholder="Paste Connections JSON object or array here…" className="w-full resize-y rounded-xl border border-border bg-bg-surface-alt/60 px-4 py-3 font-mono text-sm text-text-heading focus:border-primary focus:outline-none focus:ring-2 focus:ring-primary/20" />
+              {!preview && <button onClick={previewImport} disabled={!rawJson.trim() || busy} className="w-full min-h-11 rounded-xl bg-primary px-5 text-sm font-bold text-white disabled:opacity-45">{busy ? "Checking…" : "Preview pack(s)"}</button>}
+              {error && <div role="alert" className="rounded-xl border border-error/20 bg-error-bg p-4 text-sm text-error"><p className="font-bold">{error}</p>{details.length > 0 && <ul className="mt-2 list-disc space-y-1 pl-5">{details.map((detail) => <li key={detail}>{detail}</li>)}</ul>}</div>}
+              {preview && (
+                <div className="space-y-4 rounded-2xl border border-primary/15 bg-bg-callout p-4">
+                  <div className="flex items-center justify-between"><p className="font-extrabold text-text-heading">{preview.count} {preview.count === 1 ? "pack" : "packs"} ready</p>{preview.wasRepaired && <span className="text-xs font-bold text-primary">JSON syntax repaired</span>}</div>
+                  <div className="space-y-3">
+                    {preview.packs.map((pack, index) => (
+                      <article key={`${pack.name}-${index}`} className="rounded-xl border border-border-light bg-bg-surface p-3">
+                        <label className="mb-1 block text-xs font-bold uppercase tracking-wide text-text-muted">Pack {index + 1} name</label>
+                        <input value={names[index] ?? ""} onChange={(event) => setNames((current) => current.map((name, nameIndex) => nameIndex === index ? event.target.value : name))} className="w-full rounded-lg border border-border bg-bg-surface-alt/50 px-3 py-2 font-bold text-text-heading" />
+                        <div className="mt-2 flex flex-wrap gap-1.5">{pack.categories.map((category) => <span key={category} className="rounded-full bg-bg-surface-alt px-2 py-1 text-[11px] font-bold text-text-secondary">{category}</span>)}</div>
+                        <p className="mt-2 text-xs text-text-muted">16 tiles · 4 groups</p>
+                      </article>
+                    ))}
+                  </div>
+                  {preview.packs.some((pack) => pack.warnings.length > 0) && <div className="rounded-xl border border-amber-400/30 bg-amber-400/10 p-3 text-sm text-text-secondary"><p className="font-bold text-text-heading">Review warnings</p><ul className="mt-1 list-disc space-y-1 pl-5">{preview.packs.flatMap((pack, index) => pack.warnings.map((warning) => `Pack ${index + 1}: ${warning}`)).map((warning) => <li key={warning}>{warning}</li>)}</ul><label className="mt-3 flex items-start gap-2"><input type="checkbox" checked={acknowledged} onChange={(event) => setAcknowledged(event.target.checked)} className="mt-1" /><span>I reviewed these warnings and want to import the packs.</span></label></div>}
+                  <button onClick={saveImport} disabled={busy || names.some((name) => !name.trim()) || (preview.packs.some((pack) => pack.warnings.length > 0) && !acknowledged)} className="w-full min-h-11 rounded-xl bg-primary px-5 text-sm font-bold text-white disabled:opacity-45">{busy ? "Importing…" : `Import ${preview.count} ${preview.count === 1 ? "pack" : "packs"}`}</button>
+                </div>
+              )}
+            </div>
+          )}
+        </div>
+      </section>
+    </div>
+  );
+}