Restructure omni services and add Chatwoot research snapshot

research/chatwoot/app/javascript/dashboard/api/CacheEnabledApiClient.js

@@ -0,0 +1,97 @@
+/* global axios */
+import { DataManager } from '../helper/CacheHelper/DataManager';
+import ApiClient from './ApiClient';
+
+class CacheEnabledApiClient extends ApiClient {
+  constructor(resource, options = {}) {
+    super(resource, options);
+    this.dataManager = new DataManager(this.accountIdFromRoute);
+  }
+
+  // eslint-disable-next-line class-methods-use-this
+  get cacheModelName() {
+    throw new Error('cacheModelName is not defined');
+  }
+
+  get(cache = false) {
+    if (cache) {
+      return this.getFromCache();
+    }
+
+    return this.getFromNetwork();
+  }
+
+  getFromNetwork() {
+    return axios.get(this.url);
+  }
+
+  // eslint-disable-next-line class-methods-use-this
+  extractDataFromResponse(response) {
+    return response.data.payload;
+  }
+
+  // eslint-disable-next-line class-methods-use-this
+  marshallData(dataToParse) {
+    return { data: { payload: dataToParse } };
+  }
+
+  async getFromCache() {
+    try {
+      // IDB is not supported in Firefox private mode: https://bugzilla.mozilla.org/show_bug.cgi?id=781982
+      await this.dataManager.initDb();
+    } catch {
+      return this.getFromNetwork();
+    }
+
+    const { data } = await axios.get(
+      `/api/v1/accounts/${this.accountIdFromRoute}/cache_keys`
+    );
+    const cacheKeyFromApi = data.cache_keys[this.cacheModelName];
+    const isCacheValid = await this.validateCacheKey(cacheKeyFromApi);
+
+    let localData = [];
+    if (isCacheValid) {
+      localData = await this.dataManager.get({
+        modelName: this.cacheModelName,
+      });
+    }
+
+    if (localData.length === 0) {
+      return this.refetchAndCommit(cacheKeyFromApi);
+    }
+
+    return this.marshallData(localData);
+  }
+
+  async refetchAndCommit(newKey = null) {
+    const response = await this.getFromNetwork();
+
+    try {
+      await this.dataManager.initDb();
+
+      this.dataManager.replace({
+        modelName: this.cacheModelName,
+        data: this.extractDataFromResponse(response),
+      });
+
+      await this.dataManager.setCacheKeys({
+        [this.cacheModelName]: newKey,
+      });
+    } catch {
+      // Ignore error
+    }
+
+    return response;
+  }
+
+  async validateCacheKey(cacheKeyFromApi) {
+    if (!this.dataManager.db) {
+      await this.dataManager.initDb();
+    }
+
+    const cachekey = await this.dataManager.getCacheKey(this.cacheModelName);
+    return cacheKeyFromApi === cachekey;
+  }
+}
+
+export default CacheEnabledApiClient;