@khoativi/nestjs-class-validator-i18n/dist/i18n.js

NestJS integration for class-validator with i18n support using Accept-Language headers and customizable locale files.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.I18n = void 0;
const fs_1 = require("fs");
const path_1 = require("path");
class I18n {
    fallback;
    cache = new Map();
    constructor(fallback = 'en') {
        this.fallback = fallback;
        const fallbackMessages = this.readMessagesFile(fallback);
        this.cache.set(fallback, fallbackMessages);
    }
    load(lang) {
        if (this.cache.has(lang))
            return this.cache.get(lang);
        const filePath = (0, path_1.resolve)(__dirname, 'messages', `${lang}.json`);
        if ((0, fs_1.existsSync)(filePath)) {
            const messages = JSON.parse((0, fs_1.readFileSync)(filePath, 'utf8'));
            this.cache.set(lang, messages);
            return messages;
        }
        return this.cache.get(this.fallback);
    }
    translate(lang, key, property, constraints) {
        const messages = this.load(lang);
        const template = messages[key] || this.cache.get(this.fallback)?.[key] || key;
        return template
            .replace('$property', property)
            .replace(/\$constraint(\d+)/g, (_, i) => String(constraints[+i - 1]));
    }
    readMessagesFile(lang) {
        const filePath = (0, path_1.resolve)(__dirname, 'messages', `${lang}.json`);
        if (!(0, fs_1.existsSync)(filePath))
            return {};
        return JSON.parse((0, fs_1.readFileSync)(filePath, 'utf8'));
    }
}
exports.I18n = I18n;
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