const DB_VERSION = 22; // @See https://github.com/mdn/learning-area/blob/master/javascript/apis/client-side-storage/indexeddb/video-store/index.js let db; let reload = false; let items; let sets; /* * Load item set from local DB. Calls init() on success. */ async function load_local(init_func) { let get_tx = db.transaction(['item_db', 'set_db'], 'readonly'); let sets_store = get_tx.objectStore('set_db'); let get_store = get_tx.objectStore('item_db'); let request = get_store.getAll(); request.onerror = function(event) { console.log("Could not read local item db..."); } request.onsuccess = function(event) { console.log("Successfully read local item db."); items = request.result; let request2 = sets_store.openCursor(); sets = {}; request2.onerror = function(event) { console.log("Could not read local set db..."); } request2.onsuccess = function(event) { let cursor = event.target.result; if (cursor) { sets[cursor.primaryKey] = cursor.value; cursor.continue(); } else { console.log("Successfully read local set db."); console.log(sets); init_func(); } } } await get_tx.complete; db.close(); } /* * Clean bad item data. For now just assigns display name if it isn't already assigned. */ function clean_item(item) { if (item.displayName === undefined) { item.displayName = item.name; } item.skillpoints = [item.str, item.dex, item.int, item.def, item.agi]; item.has_negstat = item.str < 0 || item.dex < 0 || item.int < 0 || item.def < 0 || item.agi < 0; item.reqs = [item.strReq, item.dexReq, item.intReq, item.defReq, item.agiReq]; } /* * Load item set from remote DB (aka a big json file). Calls init() on success. */ async function load(init_func) { let getUrl = window.location; let baseUrl = getUrl.protocol + "//" + getUrl.host + "/" + getUrl.pathname.split('/')[1]; let url = baseUrl + "/compress.json"; let result = await (await fetch(url)).json(); items = result.items; sets = result.sets; let add_tx = db.transaction(['item_db', 'set_db'], 'readwrite'); let items_store = add_tx.objectStore('item_db'); let add_promises = []; for (const item of items) { clean_item(item); add_promises.push(items_store.add(item, item.name)); } let sets_store = add_tx.objectStore('set_db'); for (const set in sets) { add_promises.push(sets_store.add(sets[set], set)); } add_promises.push(add_tx.complete); Promise.all(add_promises).then((values) => { db.close(); init_func(); }); } function load_init(init_func) { let request = window.indexedDB.open('item_db', DB_VERSION); request.onerror = function() { console.log("DB failed to open..."); }; request.onsuccess = function() { db = request.result; if (!reload) { console.log("Using stored data...") load_local(init_func); } else { console.log("Using new data...") load(init_func); } } request.onupgradeneeded = function(e) { reload = true; let db = e.target.result; try { db.deleteObjectStore('item_db'); } catch (error) { console.log("Could not delete item DB. This is probably fine"); } try { db.deleteObjectStore('set_db'); } catch (error) { console.log("Could not delete set DB. This is probably fine"); } db.createObjectStore('item_db'); db.createObjectStore('set_db'); console.log("DB setup complete..."); } }