@tsclean/core
Version:
Plugin for API Rest Full development, based on Clean Architecture, IoC and Dependency Injection.
120 lines • 26 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.WsContextCreator = void 0;
const helpers_1 = require("../../helpers");
const context_utils_1 = require("../../helpers/context-utils");
const access_1 = require("../../access");
const websockets_1 = require("../../websockets");
const ws_metadata_constants_1 = require("./ws-metadata-constants");
const shared_utils_1 = require("../../utils/shared.utils");
class WsContextCreator {
constructor(wsProxy, exceptionFiltersContext, handlerContextCreator, handlerConsumer, guardsContextCreator, guardsConsumer, interceptorsContextCreator, interceptorsConsumer) {
this.wsProxy = wsProxy;
this.exceptionFiltersContext = exceptionFiltersContext;
this.handlerContextCreator = handlerContextCreator;
this.handlerConsumer = handlerConsumer;
this.guardsContextCreator = guardsContextCreator;
this.guardsConsumer = guardsConsumer;
this.interceptorsContextCreator = interceptorsContextCreator;
this.interceptorsConsumer = interceptorsConsumer;
this.contextUtils = new context_utils_1.ContextUtils();
this.wsParamsFactory = new websockets_1.WsParamsFactory();
this.handlerMetadataStorage = new helpers_1.HandlerMetadataStorage();
}
create(instance, callback, moduleKey, methodName) {
const contextType = 'ws';
const { argsLength, paramtypes, getParamsMetadata } = this.getMetadata(instance, methodName, contextType);
const exceptionHandler = this.exceptionFiltersContext.create(instance, callback, moduleKey);
const pipes = this.handlerContextCreator.create(instance, callback, moduleKey);
const guards = this.guardsContextCreator.create(instance, callback, moduleKey);
const interceptors = this.interceptorsContextCreator.create(instance, callback, moduleKey);
const paramsMetadata = getParamsMetadata(moduleKey);
const paramsOptions = paramsMetadata
? this.contextUtils.mergeParamsMetaTypes(paramsMetadata, paramtypes)
: [];
const fnApplyPipes = this.createPipesFn(pipes, paramsOptions);
const fnCanActivate = this.createGuardsFn(guards, instance, callback, contextType);
const handler = (initialArgs, args) => async () => {
if (fnApplyPipes) {
await fnApplyPipes(initialArgs, ...args);
return callback.apply(instance, initialArgs);
}
return callback.apply(instance, args);
};
const targetPattern = this.reflectCallbackPattern(callback);
return this.wsProxy.create(async (...args) => {
args.push(targetPattern);
const initialArgs = this.contextUtils.createNullArray(argsLength);
fnCanActivate && (await fnCanActivate(args));
return this.interceptorsConsumer.intercept(interceptors, args, instance, callback, handler(initialArgs, args), contextType);
}, exceptionHandler, targetPattern);
}
reflectCallbackParamtypes(instance, callback) {
return Reflect.getMetadata(helpers_1.PARAMTYPES_METADATA, instance, callback.name);
}
reflectCallbackPattern(callback) {
return Reflect.getMetadata(helpers_1.MESSAGE_METADATA, callback);
}
createGuardsFn(guards, instance, callback, contextType) {
const canActivateFn = async (args) => {
const canActivate = await this.guardsConsumer.tryAccess(guards, args, instance, callback, contextType);
if (!canActivate) {
throw new websockets_1.WsException(access_1.FORBIDDEN_MESSAGE);
}
};
return guards.length ? canActivateFn : null;
}
getMetadata(instance, methodName, contextType) {
const cacheMetadata = this.handlerMetadataStorage.get(instance, methodName);
if (cacheMetadata) {
return cacheMetadata;
}
const metadata = this.contextUtils.reflectCallbackMetadata(instance, methodName, helpers_1.PARAM_ARGS_METADATA) || ws_metadata_constants_1.DEFAULT_CALLBACK_METADATA;
const keys = Object.keys(metadata);
const argsLength = this.contextUtils.getArgumentsLength(keys, metadata);
const paramtypes = this.contextUtils.reflectCallbackParamTypes(instance, methodName);
const contextFactory = this.contextUtils.getContextFactory(contextType, instance, instance[methodName]);
const getParamsMetadata = (moduleKey) => this.exchangeKeysForValues(keys, metadata, moduleKey, this.wsParamsFactory, contextFactory);
const handlerMetadata = {
argsLength,
paramtypes,
getParamsMetadata
};
this.handlerMetadataStorage.set(instance, methodName, handlerMetadata);
return handlerMetadata;
}
exchangeKeysForValues(keys, metadata, moduleContext, paramsFactory, contextFactory) {
this.handlerContextCreator.setModuleContext(moduleContext);
return keys.map(key => {
const { index, data, handlers: pipesCollection } = metadata[key];
const handlers = this.handlerContextCreator.createConcreteContext(pipesCollection);
const type = this.contextUtils.mapParamType(key);
if (key.includes(helpers_1.CUSTOM_ROUTE_AGRS_METADATA)) {
const { factory } = metadata[key];
const customExtractValue = this.contextUtils.getCustomFactory(factory, data, contextFactory);
return { index, extractValue: customExtractValue, type, data, handlers };
}
const numericType = Number(type);
const extractValue = (...args) => paramsFactory.exchangeKeyForValue(numericType, data, args);
return { index, extractValue, type: numericType, data, handlers };
});
}
createPipesFn(handler, paramsOptions) {
const pipesFn = async (args, ...params) => {
const resolveParamValue = async (param) => {
const { index, extractValue, type, data, metaType, handlers: paramPipes } = param;
const value = extractValue(...params);
args[index] = await this.getParamValue(value, { metaType, type, data }, handler.concat(paramPipes));
};
await Promise.all(paramsOptions.map(resolveParamValue));
};
return paramsOptions.length ? pipesFn : null;
}
async getParamValue(value, { metaType, type, data }, pipes) {
return (0, shared_utils_1.isEmpty)(pipes)
? value
: this.handlerConsumer.apply(value, { metaType, type, data }, pipes);
}
}
exports.WsContextCreator = WsContextCreator;
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{\n  CUSTOM_ROUTE_AGRS_METADATA,\n  ExecutionContextHost,\n  HandlerMetadataStorage,\n  MESSAGE_METADATA,\n  PARAM_ARGS_METADATA,\n  PARAMTYPES_METADATA\n} from '../../helpers'\nimport { ContextUtils, ParamProperties } from '../../helpers/context-utils'\nimport { ExceptionFiltersContext } from './exception-filters-context'\nimport { ContextType, ControllerType } from '../../types'\nimport {\n  AccessResourceConsumer,\n  AccessResourceContextCreator,\n  FORBIDDEN_MESSAGE\n} from '../../access'\nimport {\n  HandlerConsumer,\n  WsException,\n  HandlerContextCreator,\n  WsParamsFactory\n} from '../../websockets'\nimport { HandlerTransform, ParamsMetadataInterface } from '../../contracts'\nimport {\n  InterceptorsConsumer,\n  InterceptorsContextCreator\n} from '../../interceptors'\nimport { WsProxy } from './ws-proxy'\nimport { DEFAULT_CALLBACK_METADATA } from './ws-metadata-constants'\nimport { isEmpty } from '../../utils/shared.utils'\n\ntype WsParamProperties = ParamProperties & { metatype?: any }\nexport interface WsHandlerMetadata {\n  argsLength: number\n  paramtypes: any[]\n  getParamsMetadata: (moduleKey: string) => WsParamProperties[]\n}\n\nexport class WsContextCreator {\n  private readonly contextUtils = new ContextUtils()\n  private readonly wsParamsFactory = new WsParamsFactory()\n  private readonly handlerMetadataStorage =\n    new HandlerMetadataStorage<WsHandlerMetadata>()\n\n  constructor (\n    private readonly wsProxy: WsProxy,\n    private readonly exceptionFiltersContext: ExceptionFiltersContext,\n    private readonly handlerContextCreator: HandlerContextCreator,\n    private readonly handlerConsumer: HandlerConsumer,\n    private readonly guardsContextCreator: AccessResourceContextCreator,\n    private readonly guardsConsumer: AccessResourceConsumer,\n    private readonly interceptorsContextCreator: InterceptorsContextCreator,\n    private readonly interceptorsConsumer: InterceptorsConsumer\n  ) {}\n\n  public create<T extends ParamsMetadataInterface = ParamsMetadataInterface> (\n    instance: ControllerType,\n    callback: (...args: unknown[]) => void,\n    moduleKey: string,\n    methodName: string\n  ): (...args: any[]) => Promise<void> {\n    const contextType: ContextType = 'ws'\n    const { argsLength, paramtypes, getParamsMetadata } = this.getMetadata<T>(\n      instance,\n      methodName,\n      contextType\n    )\n    const exceptionHandler = this.exceptionFiltersContext.create(\n      instance,\n      callback,\n      moduleKey\n    )\n    const pipes = this.handlerContextCreator.create(\n      instance,\n      callback,\n      moduleKey\n    )\n    const guards = this.guardsContextCreator.create(\n      instance,\n      callback,\n      moduleKey\n    )\n    const interceptors = this.interceptorsContextCreator.create(\n      instance,\n      callback,\n      moduleKey\n    )\n\n    const paramsMetadata = getParamsMetadata(moduleKey)\n    const paramsOptions = paramsMetadata\n      ? this.contextUtils.mergeParamsMetaTypes(paramsMetadata, paramtypes)\n      : []\n    const fnApplyPipes = this.createPipesFn(pipes, paramsOptions)\n\n    const fnCanActivate = this.createGuardsFn(\n      guards,\n      instance,\n      callback,\n      contextType\n    )\n\n    const handler = (initialArgs: unknown[], args: unknown[]) => async () => {\n      if (fnApplyPipes) {\n        await fnApplyPipes(initialArgs, ...args)\n        return callback.apply(instance, initialArgs)\n      }\n      return callback.apply(instance, args)\n    }\n    const targetPattern = this.reflectCallbackPattern(callback)\n    return this.wsProxy.create(\n      async (...args: unknown[]) => {\n        args.push(targetPattern)\n\n        const initialArgs = this.contextUtils.createNullArray(argsLength)\n        fnCanActivate && (await fnCanActivate(args))\n\n        return this.interceptorsConsumer.intercept(\n          interceptors,\n          args,\n          instance,\n          callback,\n          handler(initialArgs, args),\n          contextType\n        )\n      },\n      exceptionHandler,\n      targetPattern\n    )\n  }\n\n  public reflectCallbackParamtypes (\n    instance: ControllerType,\n    callback: (...args: any[]) => any\n  ): any[] {\n    return Reflect.getMetadata(PARAMTYPES_METADATA, instance, callback.name)\n  }\n\n  public reflectCallbackPattern (callback: (...args: any[]) => any): string {\n    return Reflect.getMetadata(MESSAGE_METADATA, callback)\n  }\n\n  public createGuardsFn<TContext extends string = ContextType> (\n    guards: any[],\n    instance: ControllerType,\n    callback: (...args: unknown[]) => any,\n    contextType?: TContext\n  ): Function | null {\n    const canActivateFn = async (args: any[]) => {\n      const canActivate = await this.guardsConsumer.tryAccess<TContext>(\n        guards,\n        args,\n        instance,\n        callback,\n        contextType\n      )\n      if (!canActivate) {\n        throw new WsException(FORBIDDEN_MESSAGE)\n      }\n    }\n    return guards.length ? canActivateFn : null\n  }\n\n  public getMetadata<TMetadata, TContext extends ContextType = ContextType> (\n    instance: ControllerType,\n    methodName: string,\n    contextType: TContext\n  ): WsHandlerMetadata {\n    const cacheMetadata = this.handlerMetadataStorage.get(instance, methodName)\n    if (cacheMetadata) {\n      return cacheMetadata\n    }\n    const metadata =\n      this.contextUtils.reflectCallbackMetadata<TMetadata>(\n        instance,\n        methodName,\n        PARAM_ARGS_METADATA\n      ) || DEFAULT_CALLBACK_METADATA\n    const keys = Object.keys(metadata)\n    const argsLength = this.contextUtils.getArgumentsLength(keys, metadata)\n    const paramtypes = this.contextUtils.reflectCallbackParamTypes(\n      instance,\n      methodName\n    )\n    const contextFactory = this.contextUtils.getContextFactory(\n      contextType,\n      instance,\n      instance[methodName]\n    )\n    const getParamsMetadata = (moduleKey: string) =>\n      this.exchangeKeysForValues(\n        keys,\n        metadata,\n        moduleKey,\n        this.wsParamsFactory,\n        contextFactory\n      )\n\n    const handlerMetadata: WsHandlerMetadata = {\n      argsLength,\n      paramtypes,\n      getParamsMetadata\n    }\n    this.handlerMetadataStorage.set(instance, methodName, handlerMetadata)\n    return handlerMetadata\n  }\n\n  public exchangeKeysForValues<TMetadata = any> (\n    keys: string[],\n    metadata: TMetadata,\n    moduleContext: string,\n    paramsFactory: WsParamsFactory,\n    contextFactory: (args: unknown[]) => ExecutionContextHost\n  ): ParamProperties[] {\n    this.handlerContextCreator.setModuleContext(moduleContext)\n\n    return keys.map(key => {\n      const { index, data, handlers: pipesCollection } = metadata[key]\n      const handlers =\n        this.handlerContextCreator.createConcreteContext(pipesCollection)\n      const type = this.contextUtils.mapParamType(key)\n\n      if (key.includes(CUSTOM_ROUTE_AGRS_METADATA)) {\n        const { factory } = metadata[key]\n        const customExtractValue = this.contextUtils.getCustomFactory(\n          factory,\n          data,\n          contextFactory\n        )\n        return { index, extractValue: customExtractValue, type, data, handlers }\n      }\n      const numericType = Number(type)\n      const extractValue = (...args: any[]) =>\n        paramsFactory.exchangeKeyForValue(numericType, data, args)\n\n      return { index, extractValue, type: numericType, data, handlers }\n    })\n  }\n\n  public createPipesFn (\n    handler: HandlerTransform[],\n    paramsOptions: (ParamProperties & { metaType?: unknown })[]\n  ) {\n    const pipesFn = async (args: unknown[], ...params: unknown[]) => {\n      const resolveParamValue = async (\n        param: ParamProperties & { metaType?: unknown }\n      ) => {\n        const {\n          index,\n          extractValue,\n          type,\n          data,\n          metaType,\n          handlers: paramPipes\n        } = param\n        const value = extractValue(...params)\n\n        args[index] = await this.getParamValue(\n          value,\n          { metaType, type, data },\n          handler.concat(paramPipes)\n        )\n      }\n      await Promise.all(paramsOptions.map(resolveParamValue))\n    }\n    return paramsOptions.length ? pipesFn : null\n  }\n\n  public async getParamValue<T> (\n    value: T,\n    { metaType, type, data }: { metaType: any; type: any; data: any },\n    pipes: HandlerTransform[]\n  ): Promise<any> {\n    return isEmpty(pipes)\n      ? value\n      : this.handlerConsumer.apply(value, { metaType, type, data }, pipes)\n  }\n}\n"]}