add idb-key provider

Author: hannojg

lib/storage/providers/IDBKeyVal.js

@@ -0,0 +1,55 @@
+import {
+    set,
+    keys,
+    getMany,
+    setMany,
+    get,
+    clear,
+    del,
+    delMany,
+    createStore,
+    promisifyRequest,
+} from 'idb-keyval';
+import _ from 'underscore';
+import fastMerge from '../../fastMerge';
+
+// Same config as localforage, so we can swap the providers easily
+const customStore = createStore('OnyxDB', 'keyvaluepairs');
+
+const provider = {
+    getAllKeys: () => keys(customStore),
+
+    multiGet: keysParam => getMany(keysParam, customStore)
+        .then(values => _.map(values, (value, index) => [keysParam[index], value])),
+
+    getItem: key => get(key, customStore),
+
+    multiSet: pairs => setMany(pairs, customStore),
+
+    setItem: (key, value) => set(key, value, customStore),
+
+    multiMerge: pairs => customStore('readwrite', (store) => {
+        const getValues = Promise.all(_.map(pairs, ([key]) => promisifyRequest(store.get(key))));
+
+        return getValues.then((values) => {
+            const upsertMany = _.map(pairs, ([key, value], index) => {
+                const prev = values[index];
+                const newValue = _.isObject(prev) ? fastMerge(prev, value) : value;
+                return promisifyRequest(store.put(newValue, key));
+            });
+            return Promise.all(upsertMany);
+        });
+    }),
+
+    mergeItem(key, _changes, modifiedData) {
+        return provider.multiMerge([[key, modifiedData]]);
+    },
+
+    clear: () => clear(customStore),
+
+    removeItem: key => del(key, customStore),
+
+    removeItems: keysParam => delMany(keysParam, customStore),
+};
+
+export default provider;