70 lines
1.8 KiB
TypeScript
70 lines
1.8 KiB
TypeScript
import { createBrowserEnv } from './createBrowserEnv';
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import { createFileSystem } from './createFileSystem';
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import { createWorkerEnv } from './createWorkerEnv';
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import { isBrowser } from './isBrowser';
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import { isNodejs } from './isNodejs';
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import { Environment } from './types';
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let environment: Environment | null
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function getEnv(): Environment {
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if (!environment) {
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throw new Error('getEnv - environment is not defined, check isNodejs() and isBrowser()')
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}
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return environment
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}
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function setEnv(env: Environment) {
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environment = env
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}
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function isWorker() {
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return typeof importScripts === 'function'
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}
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function initialize() {
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// check for isBrowser() first to prevent electron renderer process
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// to be initialized with wrong environment due to isNodejs() returning true
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if (isWorker()) {
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setEnv(createWorkerEnv())
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} else if (isBrowser()) {
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setEnv(createBrowserEnv())
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}
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}
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function monkeyPatch(env: Partial<Environment>) {
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if (!environment) {
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initialize()
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}
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if (!environment) {
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throw new Error('monkeyPatch - environment is not defined, check isNodejs() and isBrowser()')
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}
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const { Canvas = environment.Canvas, Image = environment.Image } = env
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environment.Canvas = Canvas
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environment.Image = Image
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environment.createCanvasElement = env.createCanvasElement || (() => new Canvas())
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environment.createImageElement = env.createImageElement || (() => new Image())
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environment.ImageData = env.ImageData || environment.ImageData
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environment.Video = env.Video || environment.Video
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environment.fetch = env.fetch || environment.fetch
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environment.readFile = env.readFile || environment.readFile
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}
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export const env = {
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getEnv,
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setEnv,
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initialize,
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createBrowserEnv,
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createFileSystem,
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monkeyPatch,
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isBrowser,
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isNodejs
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}
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initialize()
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export * from './types'
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