feat: adding Persistance as plugin

package.json

@@ -2,6 +2,16 @@
   "name": "@contentstack/delivery-sdk",
   "version": "4.6.1",
   "type": "module",
+  "description": "Contentstack Delivery SDK for TypeScript",
+  "homepage": "https://www.contentstack.com/",
+  "author": {
+    "name": "Contentstack",
+    "url": "https://www.contentstack.com/"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/contentstack/contentstack-typescript"
+  },
   "license": "MIT",
   "main": "./dist/legacy/index.cjs",
   "module": "./dist/legacy/index.js",

src/lib/cache.ts

@@ -1,6 +1,5 @@
 // import { PersistanceStore } from '../persistance';
 
-import { PersistanceStore } from '../persistance';
 import { CacheOptions, Policy } from './types';
 
 export async function handleRequest(
@@ -11,6 +10,15 @@ export async function handleRequest(
   reject: any,
   config: any
 ) {
+
+  try {
+    var PersistancePlugin = require('contentstack-persistance-typescript');
+    var PersistanceStore = PersistancePlugin.PersistanceStore;
+
+  } catch (e) {
+    throw new Error('Persistance store not provided. Please install contentstack-persistance-typescript package.');
+  }
+
   const cacheStore = new PersistanceStore(cacheOptions);
   switch (cacheOptions.policy) {
     case Policy.NETWORK_ELSE_CACHE: {

src/lib/contentstack.ts

@@ -97,8 +97,12 @@ export function stack(config: StackConfig): StackClass {
     const defaultAdapter = client.defaults.adapter;
     client.defaults.adapter = (adapterConfig: any) => {
       return new Promise(async (resolve, reject) => {
-        if (config.cacheOptions)
+        if (config.cacheOptions) {
           await handleRequest(config.cacheOptions, config.apiKey, defaultAdapter, resolve, reject, adapterConfig);
+        }
+        else {
+          throw new Error('Persistance store not provided. Please provide persistance store plugin object.');
+        }
       });
     };
   }

src/lib/types.ts

@@ -1,6 +1,5 @@
 /* eslint-disable @cspell/spellchecker */
 import { HttpClientParams } from '@contentstack/core';
-import { PersistanceStoreOptions, StorageType } from '../persistance';
 
 // Internal Types
 export type params = {
@@ -36,9 +35,9 @@ export interface StackConfig extends HttpClientParams {
   port?: number;
   debug?: boolean;
 }
-export interface CacheOptions extends PersistanceStoreOptions {
+export interface CacheOptions {
   policy: Policy;
-  storeType?: StorageType;
+  storeType?: any;
 }
 
 export enum Policy {