Initial commit

lib/store.js

@@ -0,0 +1,47 @@
+export default function Store(objectStoreName) {
+    const transact = () => {
+        return this.db
+            .transaction(objectStoreName, "readwrite")
+            .objectStore(objectStoreName)
+    }
+    
+    this.Get = (key) =>  {
+        return promisify(
+            transact().get(key)
+        )
+    }
+    
+    this.Set = (key, value) => {
+        return promisify(
+            transact().put(value, key)
+        )
+    }
+
+    return this
+}
+
+Store.Open = async (dbName, objectStoreName) => {
+    let store = new Store(objectStoreName)
+    const request = indexedDB.open(dbName, 2)
+
+    request.onupgradeneeded = (event) => {
+        const db = event.target.result
+        const objectStore = db.createObjectStore(objectStoreName)
+
+        objectStore.createIndex('value', 'value', { unique: false })
+    }
+
+    store.db = await promisify(request)
+    return store
+}
+
+export function promisify(request) {
+    return new Promise((resolve, reject) => {
+        request.onsuccess = (event) => {
+            resolve(request.result)
+        }
+        request.onerror = (event) => {
+            reject(request.error)
+        }
+    })
+}