73 lines
1.6 KiB
TypeScript
73 lines
1.6 KiB
TypeScript
import { base64Decode, base64Encode } from "./base64.ts";
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import { mime } from "../deps.ts";
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type DataUrl = string;
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// Mapping from path -> `data:mimetype;base64,base64-encoded-data` strings
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export type AssetJson = Record<string, DataUrl>;
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export class AssetBundle {
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readonly bundle: AssetJson;
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constructor(bundle: AssetJson = {}) {
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this.bundle = bundle;
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}
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has(path: string): boolean {
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return path in this.bundle;
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}
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listFiles(): string[] {
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return Object.keys(this.bundle);
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}
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readFileSync(
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path: string,
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): Uint8Array {
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const content = this.bundle[path];
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if (!content) {
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throw new Error(`No such file ${path}`);
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}
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const data = content.split(",", 2)[1];
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return base64Decode(data);
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}
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readFileAsDataUrl(path: string): string {
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const content = this.bundle[path];
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if (!content) {
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throw new Error(`No such file ${path}`);
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}
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return content;
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}
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readTextFileSync(
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path: string,
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): string {
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return new TextDecoder().decode(this.readFileSync(path));
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}
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getMimeType(
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path: string,
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): string {
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const content = this.bundle[path];
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if (!content) {
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throw new Error(`No such file ${path}`);
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}
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return content.split(";")[0].split(":")[1];
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}
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writeFileSync(path: string, data: Uint8Array) {
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const encoded = base64Encode(data);
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const mimeType = mime.getType(path);
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this.bundle[path] = `data:${mimeType};base64,${encoded}`;
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}
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writeTextFileSync(path: string, s: string) {
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this.writeFileSync(path, new TextEncoder().encode(s));
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}
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toJSON(): AssetJson {
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return this.bundle;
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}
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}
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