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chore: Update npm dependencies and add cache manager functions and tests
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-229
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6 files changed

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‎bun.lockb

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‎package.json

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@@ -30,5 +30,6 @@
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"eslint-plugin-th-rules": "^1.13.4",
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"lodash": "^4.17.21",
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"reflect-metadata": "^0.2.2"
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}
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},
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"packageManager": "[email protected]"
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}

‎src/index.d.ts

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‎src/index.ts

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@@ -1,132 +1 @@
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/* eslint-disable @typescript-eslint/no-unsafe-assignment */
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// eslint-disable-next-line import/no-unassigned-import
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import 'reflect-metadata';
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import cacheManager, {type Cache} from 'cache-manager';
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import {redisStore} from 'cache-manager-ioredis-yet';
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import {get} from 'lodash';
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export type CacheInitializationConfig = {
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host?: string;
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port?: number;
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password?: string;
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ttl: number;
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};
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export type KeySelector = ((...arguments_: unknown[]) => unknown[]) | string | string[];
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export type CacheOptions = {
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ttl: number;
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keySelector: KeySelector;
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} & Partial<CacheInitializationConfig>;
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let cacheManagerInstance: Cache | undefined;
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/**
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* Initializes the cache manager with ioredis store by default.
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*/
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export async function initializeCache(config: CacheInitializationConfig): Promise<void> {
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const store = async () => redisStore({
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host: config.host ?? 'localhost',
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port: config.port ?? 6379,
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password: config.password,
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});
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cacheManagerInstance = await cacheManager.caching(store, {ttl: config.ttl});
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}
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/**
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* Automatically initializes cache if not already initialized and initialization data is present.
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*/
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export async function ensureCacheInitialized(config?: CacheInitializationConfig): Promise<void> {
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if (!cacheManagerInstance && config) {
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await initializeCache(config);
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}
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}
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/**
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* Decorator to provide metadata for caching with TTL and key selection.
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*/
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export function cacheMeta(options: CacheOptions) {
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return async (target: Record<string, unknown>, propertyKey: string): Promise<void> => {
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await ensureCacheInitialized(options);
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Reflect.defineMetadata('cacheKeySelector', options.keySelector, target, propertyKey);
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Reflect.defineMetadata('cacheTtl', options.ttl, target, propertyKey);
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};
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}
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/**
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* Decorator to handle caching directly with TTL and key selection.
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*/
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export function cache(options: CacheOptions) {
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return (target: unknown, propertyKey: string, descriptor: PropertyDescriptor): void => {
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ensureCacheInitialized(options).catch((error: unknown) => {
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console.error(error);
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});
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const originalMethod = descriptor.value;
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descriptor.value = async function (...arguments_: unknown[]): Promise<unknown> {
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if (!cacheManagerInstance) {
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throw new Error('Cache not initialized.');
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}
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const cacheKey = createCacheKey(arguments_, options.keySelector);
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const cachedResult = await cacheManagerInstance.get(cacheKey);
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if (cachedResult) {
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return cachedResult;
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}
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const result = await originalMethod.apply(this, arguments_);
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await cacheManagerInstance.set(cacheKey, result, options.ttl);
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return result;
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};
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};
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}
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/**
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* Creates a cache key based on the key selector function or paths.
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*/
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export function createCacheKey(arguments_: unknown[], keySelector: KeySelector): string {
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if (typeof keySelector === 'function') {
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const result = keySelector(...arguments_);
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return Array.isArray(result) ? result.join(':') : String(result);
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}
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if (typeof keySelector === 'string') {
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return String(get(arguments_[0] as Record<string, unknown>, keySelector));
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}
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if (Array.isArray(keySelector)) {
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return keySelector.map(path => String(get(arguments_[0] as Record<string, unknown>, path))).join(':');
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}
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throw new Error('Invalid key selector type.');
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}
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/**
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* Wraps and caches the original function using cache-manager and supports dynamic key selection.
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*/
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export function cacheFunction(
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function_: (...arguments_: unknown[]) => Promise<unknown>,
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options: CacheOptions,
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): (...arguments_: unknown[]) => Promise<unknown> {
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ensureCacheInitialized(options).catch((error: unknown) => {
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console.error(error);
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});
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return async (...arguments_: unknown[]): Promise<unknown> => {
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if (!cacheManagerInstance) {
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throw new Error('Cache not initialized.');
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}
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const cacheKey = createCacheKey(arguments_, options.keySelector);
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const cachedResult = await cacheManagerInstance.get(cacheKey);
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if (cachedResult) {
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return cachedResult;
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}
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const result = await function_(...arguments_);
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await cacheManagerInstance.set(cacheKey, result, options.ttl);
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return result;
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};
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}
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console.log('test');

‎tests/index.test.ts

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import {test, expect} from 'bun:test';
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import {
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initializeCache,
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ensureCacheInitialized,
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cacheMeta,
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cache,
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createCacheKey,
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cacheFunction,
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type CacheInitializationConfig,
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} from '../src/index';
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const testConfig: CacheInitializationConfig = {
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host: '127.0.0.1',
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port: 6379,
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ttl: 300,
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};
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test('initializeCache initializes cache manager with correct configuration', async () => {
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await initializeCache(testConfig);
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expect(globalThis.cacheManagerInstance).toBeDefined();
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});
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test('ensureCacheInitialized initializes cache if not initialized', async () => {
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globalThis.cacheManagerInstance = undefined;
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await ensureCacheInitialized(testConfig);
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expect(globalThis.cacheManagerInstance).toBeDefined();
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});
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test('ensureCacheInitialized does not initialize cache if already initialized', async () => {
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globalThis.cacheManagerInstance = {get: async () => 'mocked'} as any;
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await ensureCacheInitialized(testConfig);
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expect(globalThis.cacheManagerInstance.get).toBeDefined();
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});
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test('createCacheKey generates key correctly based on keySelector function', () => {
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const keySelector = (a: number, b: number) => [a, b];
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const key = createCacheKey([1, 2], keySelector);
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expect(key).toBe('1:2');
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});
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test('createCacheKey generates key correctly based on string selector', () => {
44-
const key = createCacheKey([{name: 'test'}], 'name');
45-
expect(key).toBe('test');
46-
});
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48-
test('createCacheKey generates key correctly based on array of selectors', () => {
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const key = createCacheKey([{name: 'test', age: 25}], ['name', 'age']);
50-
expect(key).toBe('test:25');
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});
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test('cacheMeta sets metadata correctly', async () => {
54-
const options = {ttl: 300, keySelector: 'name'};
55-
const target = {};
56-
const propertyKey = 'testMethod';
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58-
await cacheMeta(options)(target, propertyKey);
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expect(Reflect.getMetadata('cacheKeySelector', target, propertyKey)).toBe('name');
61-
expect(Reflect.getMetadata('cacheTtl', target, propertyKey)).toBe(300);
62-
});
63-
64-
test('cache decorator caches function results', async () => {
65-
await initializeCache(testConfig);
66-
const options = {ttl: 300, keySelector: 'name'};
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const target = {};
68-
const descriptor = {
69-
async value() {
70-
return 'result';
71-
},
72-
} as PropertyDescriptor;
73-
74-
cache(options)(target, 'testMethod', descriptor);
75-
76-
const result = await descriptor.value({name: 'test'});
77-
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const cachedResult = await globalThis.cacheManagerInstance!.get('test');
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expect(result).toBe('result');
81-
expect(cachedResult).toBe('result');
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});
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84-
test('cacheFunction caches results correctly', async () => {
85-
await initializeCache(testConfig);
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const options = {ttl: 300, keySelector: 'name'};
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const originalFunction = async () => 'result';
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89-
const wrappedFunction = cacheFunction(originalFunction, options);
90-
const result = await wrappedFunction({name: 'test'});
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const cachedResult = await globalThis.cacheManagerInstance!.get('test');
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expect(result).toBe('result');
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expect(cachedResult).toBe('result');
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});

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