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@ngx-toolkit/cache

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Angular cache with Universal support

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import 'reflect-metadata/Reflect'; import { getCacheManager } from './cache.instance'; export const METADATA_KEY_CACHE_DEFAULTS = '_cache_defaults'; export const METADATA_KEY_CACHE_KEYS = '_cache_keys'; export const METADATA_KEY_CACHE_VALUE = '_cache_value'; /** * Allows the configuration of defaults for `CacheResult`, `CachePut`, `CacheRemove`, and `CacheRemoveAll` at the class level. * Without the method level annotations this annotation has no effect. * * @param cacheName */ export function CacheDefaults(cacheName) { return (target) => { Reflect.defineMetadata(METADATA_KEY_CACHE_DEFAULTS, cacheName, target); }; } /** * When a method annotated with `CacheResult` is invoked a cache key will be generated * and *Cache.get(key)* is called before the annotated method actually executes. * If a value is found in the cache it is returned and the annotated method is never actually executed. * If no value is found the annotated method is invoked and the returned value is stored in the cache with the generated key. * * @param params (Optional) {cacheName?: string} */ export function CacheResult(params) { params = getDefaultParams(params); return (target, propertyKey, descriptor) => { const originalMethod = descriptor.value; descriptor.value = function (...args) { const cache = getCache(target, params); const cacheKey = getCacheKey(target, propertyKey, args); // Find cache value let result = cache.get(cacheKey); // Call function & save function if no cache value if (result === undefined) { // Call function & save result result = originalMethod.apply(this, args); cache.put(cacheKey, result); } return result; }; return descriptor; }; } /** * Marks a method argument as part of the cache key. * If no arguments are marked all arguments are used. * The exception is for a method annotated with `CachePut` where the `CacheValue` parameter is never included in the key. */ export function CacheKey() { return (target, propertyKey, parameterIndex) => { const indices = Reflect.getMetadata(`${METADATA_KEY_CACHE_KEYS}_${propertyKey.toString()}`, target, propertyKey) || []; indices.push(parameterIndex); Reflect.defineMetadata(`${METADATA_KEY_CACHE_KEYS}_${propertyKey.toString()}`, indices, target, propertyKey); }; } /** * When a method annotated with `CachePut` is invoked a cache key will be generated * and *Cache.put(key, value)* will be invoked on the specified cache storing the value marked with `CacheValue`. * * @param params (Optional) {cacheName?: string, afterInvocation: boolean = true} */ export function CachePut(params) { params = getDefaultParams(params); return (target, propertyKey, descriptor) => { const originalMethod = descriptor.value; descriptor.value = function (...args) { const cache = getCache(target, params); const indexValue = Reflect.getMetadata(`${METADATA_KEY_CACHE_VALUE}_${propertyKey.toString()}`, target, propertyKey); const cacheKey = getCacheKey(target, propertyKey, args, indexValue); if (!params.afterInvocation && indexValue && indexValue >= 0 && indexValue < args.length) { cache.put(cacheKey, args[indexValue]); } const result = originalMethod.apply(this, args); if (params.afterInvocation && indexValue && indexValue >= 0 && indexValue < args.length) { cache.put(cacheKey, args[indexValue]); } return result; }; return descriptor; }; } /** * Marks the parameter to be cached for a method annotated with `CachePut`. */ export function CacheValue() { return (target, propertyKey, parameterIndex) => { Reflect.defineMetadata(`${METADATA_KEY_CACHE_VALUE}_${propertyKey.toString()}`, parameterIndex, target, propertyKey); }; } /** * When a method annotated with `CacheRemove` is invoked a cache key will be generated * and *Cache.remove(key)* will be invoked on the specified cache. * The default behavior is to call *Cache.evict(key)* after the annotated method is invoked, * this behavior can be changed by setting *`afterInvocation`* to false in which case *Cache.evict(key)* * will be called before the annotated method is invoked. * * @param params (Optional) {cacheName?: string, afterInvocation: boolean = true} */ export function CacheRemove(params) { params = getDefaultParams(params); return (target, propertyKey, descriptor) => { const originalMethod = descriptor.value; descriptor.value = function (...args) { const cache = getCache(target, params); const cacheKey = getCacheKey(target, propertyKey, args); if (!params.afterInvocation) { cache.evict(cacheKey); } const result = originalMethod.apply(this, args); if (params.afterInvocation) { cache.evict(cacheKey); } return result; }; return descriptor; }; } /** * When a method annotated with `CacheRemoveAll` is invoked all elements in the specified cache will be removed via the *Cache.clear()* method. * The default behavior is to call *Cache.clear()* after the annotated method is invoked, * this behavior can be changed by setting *`afterInvocation`* to false in which case *Cache.clear()* will be called before the annotated method is invoked. * * @param params (Optional) {cacheName?: string, afterInvocation: boolean = true} */ export function CacheRemoveAll(params) { params = getDefaultParams(params); return (target, propertyKey, descriptor) => { const originalMethod = descriptor.value; descriptor.value = function (...args) { const cache = getCache(target, params); if (!params.afterInvocation) { cache.clear(); } const result = originalMethod.apply(this, args); if (params.afterInvocation) { cache.clear(); } return result; }; return descriptor; }; } function getDefaultParams(cacheParams) { return Object.assign({ afterInvocation: true }, cacheParams || {}); } function getCache(target, params) { if (!params.cacheName) { params.cacheName = Reflect.getMetadata(METADATA_KEY_CACHE_DEFAULTS, target.constructor) || ''; } const cache = getCacheManager().getCache(params.cacheName); if (!cache) { throw new Error(`Cache '${params.cacheName}' not found for ${target.constructor.name}`); } return cache; } function getCacheKey(target, propertyKey, args, cacheValueIndex = -1) { if (!args) { args = []; } const indices = Reflect.getMetadata(`${METADATA_KEY_CACHE_KEYS}_${propertyKey.toString()}`, target, propertyKey); if (indices) { args = args.filter((value, index) => indices.indexOf(index) !== -1 && cacheValueIndex !== index); } else if (cacheValueIndex !== -1) { args = args.filter((value, index) => cacheValueIndex !== index); } if (args.length === 0) { throw new Error(`Couldn't generate key without params for '${propertyKey.toString()}' method of ${target.constructor.name}`); } return args.map(a => (JSON.stringify(a) || a.toString())).join('|'); } //# 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'reflect-metadata/Reflect';\nimport {getCacheManager} from './cache.instance';\nimport {Cache} from './cache.model';\n\nexport const METADATA_KEY_CACHE_DEFAULTS = '_cache_defaults';\nexport const METADATA_KEY_CACHE_KEYS = '_cache_keys';\nexport const METADATA_KEY_CACHE_VALUE = '_cache_value';\n\nexport interface CacheParams {\n  cacheName?: string;\n}\n\nexport interface CacheParamsInvoc extends CacheParams {\n  afterInvocation?: boolean;\n}\n\n/**\n * Allows the configuration of defaults for `CacheResult`, `CachePut`, `CacheRemove`, and `CacheRemoveAll` at the class level.\n * Without the method level annotations this annotation has no effect.\n *\n * @param cacheName\n */\nexport function CacheDefaults(cacheName: string): ClassDecorator {\n  return (target: Function): void => {\n    Reflect.defineMetadata(METADATA_KEY_CACHE_DEFAULTS, cacheName, target);\n  };\n}\n\n/**\n * When a method annotated with `CacheResult` is invoked a cache key will be generated\n * and *Cache.get(key)* is called before the annotated method actually executes.\n * If a value is found in the cache it is returned and the annotated method is never actually executed.\n * If no value is found the annotated method is invoked and the returned value is stored in the cache with the generated key.\n *\n * @param params (Optional) {cacheName?: string}\n */\nexport function CacheResult(params?: CacheParams): MethodDecorator {\n  params = getDefaultParams<CacheParams>(params);\n\n  return (target: Object, propertyKey: string | symbol, descriptor: TypedPropertyDescriptor<any>): TypedPropertyDescriptor<any> => {\n    const originalMethod = descriptor.value;\n    descriptor.value = function(...args: any[]) {\n      const cache: Cache = getCache(target, params);\n      const cacheKey: string = getCacheKey(target, propertyKey, args);\n\n      // Find cache value\n      let result: any = cache.get(cacheKey);\n\n      // Call function & save function if no cache value\n      if (result === undefined) {\n        // Call function & save result\n        result = originalMethod.apply(this, args);\n        cache.put(cacheKey, result);\n      }\n\n      return result;\n    };\n    return descriptor;\n  };\n}\n\n/**\n * Marks a method argument as part of the cache key.\n * If no arguments are marked all arguments are used.\n * The exception is for a method annotated with `CachePut` where the `CacheValue` parameter is never included in the key.\n */\nexport function CacheKey(): ParameterDecorator {\n  return (target: Object, propertyKey: string | symbol, parameterIndex: number) => {\n    const indices = Reflect.getMetadata(`${METADATA_KEY_CACHE_KEYS}_${propertyKey.toString()}`, target, propertyKey) || [];\n    indices.push(parameterIndex);\n    Reflect.defineMetadata(`${METADATA_KEY_CACHE_KEYS}_${propertyKey.toString()}`, indices, target, propertyKey);\n  };\n}\n\n/**\n * When a method annotated with `CachePut` is invoked a cache key will be generated\n * and *Cache.put(key, value)* will be invoked on the specified cache storing the value marked with `CacheValue`.\n *\n * @param params (Optional) {cacheName?: string, afterInvocation: boolean = true}\n */\nexport function CachePut(params?: CacheParamsInvoc): MethodDecorator {\n  params = getDefaultParams<CacheParamsInvoc>(params);\n\n  return (target: Object, propertyKey: string | symbol, descriptor: TypedPropertyDescriptor<any>): TypedPropertyDescriptor<any> => {\n    const originalMethod = descriptor.value;\n    descriptor.value = function(...args: any[]) {\n      const cache: Cache = getCache(target, params);\n      const indexValue: number = Reflect.getMetadata(`${METADATA_KEY_CACHE_VALUE}_${propertyKey.toString()}`, target, propertyKey);\n      const cacheKey: string = getCacheKey(target, propertyKey, args, indexValue);\n\n      if (!params.afterInvocation && indexValue && indexValue >= 0 && indexValue < args.length) {\n        cache.put(cacheKey, args[indexValue]);\n      }\n\n      const result = originalMethod.apply(this, args);\n\n      if (params.afterInvocation && indexValue && indexValue >= 0 && indexValue < args.length) {\n        cache.put(cacheKey, args[indexValue]);\n      }\n\n      return result;\n    };\n    return descriptor;\n  };\n}\n\n/**\n * Marks the parameter to be cached for a method annotated with `CachePut`.\n */\nexport function CacheValue(): ParameterDecorator {\n  return (target: Object, propertyKey: string | symbol, parameterIndex: number) => {\n    Reflect.defineMetadata(`${METADATA_KEY_CACHE_VALUE}_${propertyKey.toString()}`, parameterIndex, target, propertyKey);\n  };\n}\n\n/**\n * When a method annotated with `CacheRemove` is invoked a cache key will be generated\n * and *Cache.remove(key)* will be invoked on the specified cache.\n * The default behavior is to call *Cache.evict(key)* after the annotated method is invoked,\n * this behavior can be changed by setting *`afterInvocation`* to false in which case *Cache.evict(key)*\n * will be called before the annotated method is invoked.\n *\n * @param params (Optional) {cacheName?: string, afterInvocation: boolean = true}\n */\nexport function CacheRemove(params?: CacheParamsInvoc): MethodDecorator {\n  params = getDefaultParams<CacheParamsInvoc>(params);\n\n  return (target: Object, propertyKey: string | symbol, descriptor: TypedPropertyDescriptor<any>): TypedPropertyDescriptor<any> => {\n    const originalMethod = descriptor.value;\n    descriptor.value = function(...args: any[]) {\n      const cache: Cache = getCache(target, params);\n      const cacheKey: string = getCacheKey(target, propertyKey, args);\n\n      if (!params.afterInvocation) {\n        cache.evict(cacheKey);\n      }\n\n      const result: any = originalMethod.apply(this, args);\n\n\n      if (params.afterInvocation) {\n        cache.evict(cacheKey);\n      }\n\n      return result;\n    };\n    return descriptor;\n  };\n}\n\n/**\n * When a method annotated with `CacheRemoveAll` is invoked all elements in the specified cache will be removed via the *Cache.clear()* method.\n * The default behavior is to call *Cache.clear()* after the annotated method is invoked,\n * this behavior can be changed by setting *`afterInvocation`* to false in which case *Cache.clear()* will be called before the annotated method is invoked.\n *\n * @param params (Optional) {cacheName?: string, afterInvocation: boolean = true}\n */\nexport function CacheRemoveAll(params?: CacheParamsInvoc): MethodDecorator {\n  params = getDefaultParams<CacheParamsInvoc>(params);\n\n  return (target: Object, propertyKey: string | symbol, descriptor: TypedPropertyDescriptor<any>): TypedPropertyDescriptor<any> => {\n    const originalMethod = descriptor.value;\n    descriptor.value = function(...args: any[]) {\n      const cache: Cache = getCache(target, params);\n      if (!params.afterInvocation) {\n        cache.clear();\n      }\n\n      const result: any = originalMethod.apply(this, args);\n\n      if (params.afterInvocation) {\n 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