add TagCacheManager

packages/growi-commons/src/plugin/service/tag-cache-manager.js

@@ -0,0 +1,60 @@
+import { LocalStorageManager } from '../../service/localstorage-manager';
+
+
+/**
+ * Service Class for caching React state and TagContext
+ */
+export default class TagCacheManager {
+
+  /**
+   * @callback generateCacheKey
+   * @param {TagContext} tagContext - TagContext instance
+   * @returns {string} Cache key from TagContext
+   *
+   */
+
+  /**
+   *
+   * @param {string} cacheNs Used as LocalStorageManager namespace
+   * @param {generateCacheKey} generateCacheKey
+   */
+  constructor(cacheNs, generateCacheKey) {
+    this.cacheNs = cacheNs;
+    this.generateCacheKey = generateCacheKey;
+  }
+
+  /**
+   *
+   * @param {TagContext} tagContext
+   * @returns
+   */
+  getStateCache(tagContext) {
+    const localStorageManager = LocalStorageManager.getInstance();
+
+    const key = this.generateCacheKey(tagContext);
+    const stateCache = localStorageManager.retrieveFromSessionStorage(this.cacheNs, key);
+
+    return stateCache;
+  }
+
+  /**
+   * store state object of React Component with specified key
+   *
+   * @param {TagContext} tagContext
+   * @param {object} state state object of React Component
+   */
+  cacheState(tagContext, state) {
+    const localStorageManager = LocalStorageManager.getInstance();
+    const key = this.generateCacheKey(tagContext);
+    localStorageManager.saveToSessionStorage(this.cacheNs, key, state);
+  }
+
+  /**
+   * clear all state caches
+   */
+  clearAllStateCaches() {
+    const localStorageManager = LocalStorageManager.getInstance();
+    localStorageManager.saveToSessionStorage(this.cacheNs, {});
+  }
+
+}