Diablo2D — Shadows of Tristram: complete browser ARPG

- Isometric canvas renderer (depth-sorted, FOV/fog, additive lighting) - 3 classes x 20 skills, 4 acts x 4 floors + boss lairs, torment I-X - Diablo-style loot: rarities, affix tiers, 14 legendaries, vendor, stash - Rogue camp with 6 NPCs: Charsi/Akara/Kashya/Cain/Gheed/storage - NPC quest chain (accept -> hunt -> turn in) with rewards & gating - Procedural WebAudio SFX + generative music, EN/VI localization - Saves, settings, waypoints, hardcore mode, PWA manifest - 93-assertion headless suite + browser E2E via CDP
2026-08-23 06:59:36 +00:00
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+/* ============================================================
+ * Diablo2D — save.js : localStorage persistence layer
+ * ============================================================ */
+'use strict';
+
+window.D2 = window.D2 || {};
+(function (D2) {
+
+  const PREFIX = 'd2d.';
+  const SAVE_VERSION = 3;
+
+  let storageOk = true;
+  try {
+    localStorage.setItem(PREFIX + '__probe', '1');
+    localStorage.removeItem(PREFIX + '__probe');
+  } catch (e) {
+    storageOk = false;
+  }
+
+  function get(key, fallback = null) {
+    if (!storageOk) return fallback;
+    try {
+      const raw = localStorage.getItem(PREFIX + key);
+      if (raw == null) return fallback;
+      return JSON.parse(raw);
+    } catch (e) {
+      console.warn('[save] corrupt entry', key, e);
+      return fallback;
+    }
+  }
+
+  function set(key, value) {
+    if (!storageOk) return false;
+    try {
+      localStorage.setItem(PREFIX + key, JSON.stringify(value));
+      return true;
+    } catch (e) {
+      console.error('[save] write failed', e);
+      return false;
+    }
+  }
+
+  function remove(key) {
+    if (!storageOk) return;
+    try { localStorage.removeItem(PREFIX + key); } catch (e) {}
+  }
+
+  function hasMeta() {
+    return !!get('meta', null);
+  }
+
+  function writeMeta(meta) {
+    meta.version = SAVE_VERSION;
+    meta.savedAt = Date.now();
+    set('meta', meta);
+  }
+
+  function readMeta() {
+    return get('meta', null);
+  }
+
+  function wipeAll() {
+    remove('meta');
+    remove('char');
+    remove('world');
+    remove('settings');
+  }
+
+  /* full snapshot: meta + char + world */
+  function serializeSnapshot() {
+    return JSON.stringify({
+      v: SAVE_VERSION,
+      meta: readMeta(),
+      char: get('char'),
+      world: get('world'),
+    });
+  }
+
+  function restoreSnapshot(text) {
+    try {
+      const obj = JSON.parse(text);
+      if (!obj || typeof obj !== 'object' || !obj.char) return false;
+      if (obj.meta) set('meta', obj.meta);
+      if (obj.char) set('char', obj.char);
+      if (obj.world) set('world', obj.world);
+      return true;
+    } catch (e) {
+      return false;
+    }
+  }
+
+  D2.save = {
+    version: SAVE_VERSION,
+    get storageOk() { return storageOk; },
+    KEY: { META: 'meta', CHAR: 'char', WORLD: 'world', SETTINGS: 'settings' },
+    get, set, remove,
+    hasMeta, writeMeta, readMeta,
+    wipeAll,
+    serializeSnapshot, restoreSnapshot,
+  };
+})(window.D2);