refactor progress

packages/i18n/src/runtime/CreateI18n.tsx

@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2026 Fluxer Contributors
+ *
+ * This file is part of Fluxer.
+ *
+ * Fluxer is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Fluxer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import * as fs from 'node:fs';
+import {hasLocaleFile} from '@fluxer/i18n/src/io/LocaleFilePath';
+import {parseYamlRecord} from '@fluxer/i18n/src/io/ParseYamlRecord';
+import {buildTemplates} from '@fluxer/i18n/src/runtime/BuildTemplates';
+import {getTemplate} from '@fluxer/i18n/src/runtime/GetTemplate';
+import type {I18nConfig, I18nResult, I18nState, TemplateCompiler} from '@fluxer/i18n/src/runtime/I18nTypes';
+
+interface I18nModule<TKey extends string, TValue, TVariables> {
+	getTemplate(key: TKey, locale: string | null, variables: TVariables): I18nResult<TKey, TValue>;
+	hasLocale(locale: string): boolean;
+	getLoadedLocales(): Set<string>;
+	reset(): void;
+	getState(): I18nState<TKey, TValue, TVariables>;
+}
+
+export function createI18n<TKey extends string, TValue, TVariables>(
+	config: I18nConfig<TKey, TValue, TVariables>,
+	compile: TemplateCompiler<TValue, TVariables>,
+): I18nModule<TKey, TValue, TVariables> {
+	const onWarning = config.onWarning ?? console.warn;
+
+	const state: I18nState<TKey, TValue, TVariables> = {
+		loadedLocales: new Set(),
+		templatesByLocale: new Map(),
+		messageFormatCache: new Map(),
+		config: {...config, onWarning},
+	};
+
+	loadDefaultLocale();
+
+	function loadDefaultLocale(): void {
+		if (!fs.existsSync(state.config.defaultMessagesFile)) {
+			onWarning(`Default messages bundle not found: ${state.config.defaultMessagesFile}`);
+			return;
+		}
+
+		const raw = fs.readFileSync(state.config.defaultMessagesFile, 'utf8');
+		const parsed = parseYamlRecord(raw);
+		const templates = buildTemplates(parsed, state.config, state.config.defaultMessagesFile);
+
+		state.templatesByLocale.set(state.config.defaultLocale, templates);
+		state.loadedLocales.add(state.config.defaultLocale);
+	}
+
+	return {
+		getTemplate(key: TKey, locale: string | null, variables: TVariables): I18nResult<TKey, TValue> {
+			return getTemplate(state, key, locale, variables, compile);
+		},
+
+		hasLocale(locale: string): boolean {
+			return hasLocaleFile(locale, state.config.localesPath, state.config.defaultLocale);
+		},
+
+		getLoadedLocales(): Set<string> {
+			return new Set(state.loadedLocales);
+		},
+
+		reset(): void {
+			state.loadedLocales.clear();
+			state.templatesByLocale.clear();
+			state.messageFormatCache.clear();
+			loadDefaultLocale();
+		},
+
+		getState(): I18nState<TKey, TValue, TVariables> {
+			return state;
+		},
+	};
+}