import { SimpleFile, I18NItem } from '../types';
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import isValidGlob from 'is-valid-glob';
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import glob from 'glob';
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import fs from 'fs';
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export function readVueFiles (src: string): SimpleFile[] {
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if (!isValidGlob(src)) {
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throw new Error(`vueFiles isn't a valid glob pattern.`);
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}
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const targetFiles = glob.sync(src);
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if (targetFiles.length === 0) {
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throw new Error('vueFiles glob has no files.');
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}
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return targetFiles.map((f) => {
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const fileName = f.replace(process.cwd(), '');
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return { fileName, path: f, content: fs.readFileSync(f, 'utf8') };
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});
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}
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function* getMatches (file: SimpleFile, regExp: RegExp, captureGroup = 1): IterableIterator<I18NItem> {
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while (true) {
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const match = regExp.exec(file.content);
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if (match === null) {
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break;
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}
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const line = (file.content.substring(0, match.index).match(/\n/g) || []).length + 1;
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yield {
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path: match[captureGroup],
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line,
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file: file.fileName,
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};
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}
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}
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/**
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* Extracts translation keys from methods such as `$t` and `$tc`.
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*
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* - **regexp pattern**: (?:[$ .]tc?)\(
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*
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* **description**: Matches the sequence t( or tc(, optionally with either “$”, “.” or “ ” in front of it.
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*
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* - **regexp pattern**: (["'`])
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*
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* **description**: 1. capturing group. Matches either “"”, “'”, or “`”.
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*
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* - **regexp pattern**: ((?:[^\\]|\\.)*?)
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*
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* **description**: 2. capturing group. Matches anything except a backslash
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* *or* matches any backslash followed by any character (e.g. “\"”, “\`”, “\t”, etc.)
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*
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* - **regexp pattern**: \1
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*
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* **description**: matches whatever was matched by capturing group 1 (e.g. the starting string character)
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*
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* @param file a file object
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* @returns a list of translation keys found in `file`.
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*/
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function extractMethodMatches (file: SimpleFile): I18NItem[] {
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const methodRegExp = /(?:[$ .]tc?)\(\s*?(["'`])((?:[^\\]|\\.)*?)\1/g;
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return [ ...getMatches(file, methodRegExp, 2) ];
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}
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function extractComponentMatches (file: SimpleFile): I18NItem[] {
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const componentRegExp = /(?:<i18n)(?:.|\n)*?(?:[^:]path=("|'))(.*?)\1/gi;
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return [ ...getMatches(file, componentRegExp, 2) ];
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}
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function extractDirectiveMatches (file: SimpleFile): I18NItem[] {
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const directiveRegExp = /v-t="'(.*?)'"/g;
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return [ ...getMatches(file, directiveRegExp) ];
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}
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function extractI18nItemsFromVueFiles (sourceFiles: SimpleFile[]): I18NItem[] {
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return sourceFiles.reduce((accumulator, file) => {
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const methodMatches = extractMethodMatches(file);
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const componentMatches = extractComponentMatches(file);
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const directiveMatches = extractDirectiveMatches(file);
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return [
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...accumulator,
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...methodMatches,
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...componentMatches,
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...directiveMatches,
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];
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}, [] as I18NItem[]);
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}
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export function parseVueFiles (vueFilesPath: string): I18NItem[] {
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const filesList = readVueFiles(vueFilesPath);
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return extractI18nItemsFromVueFiles(filesList);
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}
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