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import { emptyDir, ensureDir } from "../deps/fs.ts";import { posix } from "../deps/path.ts";import { md5 } from "./utils/digest.ts";
export interface Options {  /** The folder to load the files from */  folder?: string;}
/** * Class to cache the content transformations (like transform_images manipulations) */export default class Cache {  #folder: string;
  constructor(options: Options = {}) {    this.#folder = options.folder || "_cache";  }
  async set(    content: string | Uint8Array,    key: unknown,    result: string | Uint8Array,  ): Promise<void> {    const [dir, file] = await paths(content, key);
    await ensureDir(posix.join(this.#folder, dir));
    if (typeof result === "string") {      await Deno.writeTextFile(posix.join(this.#folder, dir, file), result);    } else {      await Deno.writeFile(posix.join(this.#folder, dir, file), result);    }  }
  async get(    content: Uint8Array | string,    key: unknown,  ): Promise<Uint8Array | undefined> {    const [dir, file] = await paths(content, key);
    try {      return await Deno.readFile(posix.join(this.#folder, dir, file));    } catch {      // Ignore    }  }
  async getText(content: string, key: unknown): Promise<string | undefined> {    const [dir, file] = await paths(content, key);
    try {      return await Deno.readTextFile(posix.join(this.#folder, dir, file));    } catch {      // Ignore    }  }
  async clear(): Promise<void> {    await emptyDir(this.#folder);  }}
function paths(  content: string | Uint8Array,  key: unknown,): Promise<[string, string]> {  return Promise.all([    md5(content),    md5(JSON.stringify(key)),  ]);}