57 lines
1.3 KiB
TypeScript
57 lines
1.3 KiB
TypeScript
import 'typings-global'
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import * as path from 'path'
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import * as smartq from 'smartq'
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import { Objectmap } from 'lik'
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class Smartsystem {
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lazyModules = new Objectmap<LazyModule<any>>()
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/**
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* add lazyModule to Smartsystem
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*/
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addLazyModule (lazyModuleArg: LazyModule<any>) {
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this.lazyModules.add(lazyModuleArg)
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}
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}
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// create the internal smartsystem
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let smartsystem = new Smartsystem()
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/**
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* defines a LazyModule
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*/
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export type TLoader = 'npm' | 'systemjs'
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export class LazyModule<T> {
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name: string
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cwd: string
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whenLoaded: Promise<T>
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private nameIsPath: boolean
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private whenLoadedDeferred: smartq.Deferred<T>
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constructor (nameArg: string, cwdArg: string) {
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if (!cwdArg) {
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throw new Error('You must specify a directory to resolve from!')
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}
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this.name = nameArg
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this.cwd = cwdArg
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smartsystem.addLazyModule(this) // add module to smartsystem instance
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this.nameIsPath = /\.\//.test(this.name) // figure out if name is path
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if (this.nameIsPath) {
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this.name = path.join(this.cwd, this.name)
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}
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this.whenLoadedDeferred = smartq.defer<T>()
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this.whenLoaded = this.whenLoadedDeferred.promise
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}
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/**
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* loads the module
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*/
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async load (): Promise<T> {
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let loadedModule: T = require(this.name)
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this.whenLoadedDeferred.resolve(loadedModule)
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return loadedModule
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}
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}
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