1 files changed, 86 insertions, 0 deletions
diff --git a/node_modules/algoliasearch/src/store.js b/node_modules/algoliasearch/src/store.js
new file mode 100644
index 00000000..a84c9c05
--- /dev/null
+++ b/node_modules/algoliasearch/src/store.js
@@ -0,0 +1,86 @@
+var debug = require('debug')('algoliasearch:src/hostIndexState.js');
+var localStorageNamespace = 'algoliasearch-client-js';
+
+var store;
+var moduleStore = {
+  state: {},
+  set: function(key, data) {
+    this.state[key] = data;
+    return this.state[key];
+  },
+  get: function(key) {
+    return this.state[key] || null;
+  }
+};
+
+var localStorageStore = {
+  set: function(key, data) {
+    moduleStore.set(key, data); // always replicate localStorageStore to moduleStore in case of failure
+
+    try {
+      var namespace = JSON.parse(global.localStorage[localStorageNamespace]);
+      namespace[key] = data;
+      global.localStorage[localStorageNamespace] = JSON.stringify(namespace);
+      return namespace[key];
+    } catch (e) {
+      return localStorageFailure(key, e);
+    }
+  },
+  get: function(key) {
+    try {
+      return JSON.parse(global.localStorage[localStorageNamespace])[key] || null;
+    } catch (e) {
+      return localStorageFailure(key, e);
+    }
+  }
+};
+
+function localStorageFailure(key, e) {
+  debug('localStorage failed with', e);
+  cleanup();
+  store = moduleStore;
+  return store.get(key);
+}
+
+store = supportsLocalStorage() ? localStorageStore : moduleStore;
+
+module.exports = {
+  get: getOrSet,
+  set: getOrSet,
+  supportsLocalStorage: supportsLocalStorage
+};
+
+function getOrSet(key, data) {
+  if (arguments.length === 1) {
+    return store.get(key);
+  }
+
+  return store.set(key, data);
+}
+
+function supportsLocalStorage() {
+  try {
+    if ('localStorage' in global &&
+      global.localStorage !== null) {
+      if (!global.localStorage[localStorageNamespace]) {
+        // actual creation of the namespace
+        global.localStorage.setItem(localStorageNamespace, JSON.stringify({}));
+      }
+      return true;
+    }
+
+    return false;
+  } catch (_) {
+    return false;
+  }
+}
+
+// In case of any error on localStorage, we clean our own namespace, this should handle
+// quota errors when a lot of keys + data are used
+function cleanup() {
+  try {
+    global.localStorage.removeItem(localStorageNamespace);
+  } catch (_) {
+    // nothing to do
+  }
+}