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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,76 @@ | ||
| import { readFile } from "fs/promises"; | ||
| import { basename } from "path"; | ||
| import { LoadingException } from "./exception.js"; | ||
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| export class FileHandler { | ||
| /** @type {import("./types.js").FormatHandler[]} handlers */ | ||
| #handlers; | ||
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| /** @param {import("./types.js").FormatHandler[]} handlers */ | ||
| constructor(handlers) { | ||
| this.#handlers = handlers; | ||
| } | ||
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| /** | ||
| * @param {string} filePath Absolute path to the file that needs to be handled | ||
| * @param {string} locale The locale for which the file should be handled | ||
| * @returns {Promise<import("../types.js").Dictionary>} A dictionary | ||
| * | ||
| * @throws {LoadingException} If the file could not be handled | ||
| */ | ||
| async handle(filePath, locale) { | ||
| const handler = this.#getHandler(filePath); | ||
| if (!handler) throw new Error(`Could not find handler for ${filePath}`); | ||
| const textContent = await this.#readFileContent(filePath); | ||
| const dictionary = await handler.load(filePath, textContent, locale); | ||
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| return dictionary; | ||
| } | ||
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| /** | ||
| * Resolved which handler should be used for the given file | ||
| * @param {string} filePath | ||
| * @returns {import("./types.js").FormatHandler | null} | ||
| */ | ||
| #getHandler(filePath) { | ||
| const filename = basename(filePath); | ||
| const fileExtension = filename.split(".").at(-1); | ||
| if (typeof fileExtension !== "string") | ||
| throw new LoadingException( | ||
| "Could not determine file extension for ${filePath}", | ||
| ); | ||
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| const handler = this.#handlers.find((l) => | ||
| l.fileExtensions.includes(fileExtension), | ||
| ); | ||
|
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| return handler ?? null; | ||
| } | ||
|
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| /** | ||
| * Reads the raw text content of the given file | ||
| * @param {string} filePath | ||
| * @returns {Promise<string>} | ||
| * | ||
| * @throws {LoadingException} If the file could not be read | ||
| */ | ||
| async #readFileContent(filePath) { | ||
| try { | ||
| const textContent = await readFile(filePath, "utf-8"); | ||
| return textContent; | ||
| } catch (e) { | ||
| if (!(e instanceof Error)) throw e; | ||
| throw new LoadingException(`Failed to read file ${filePath}`, { | ||
| cause: e, | ||
| }); | ||
| } | ||
| } | ||
|
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| /** | ||
| * Lists the file extensions for which a handler is available | ||
| * @returns {string[]} | ||
| */ | ||
| getSupportedFileExtensions() { | ||
| return this.#handlers.flatMap((h) => h.fileExtensions); | ||
| } | ||
| } |
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