refactor progress

packages/config/src/ConfigLoader.tsx

@@ -0,0 +1,69 @@
+/*
+ * 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 {existsSync} from 'node:fs';
+import {deepMerge} from '@fluxer/config/src/config_loader/ConfigObjectMerge';
+import {buildEnvOverrides} from '@fluxer/config/src/config_loader/EnvironmentOverrides';
+import {loadJsonFile} from '@fluxer/config/src/config_loader/JsonConfigReader';
+import {deriveEndpointsFromDomain} from '@fluxer/config/src/EndpointDerivation';
+import {type MasterConfig, MasterConfigSchema} from '@fluxer/config/src/MasterZodSchema.generated';
+
+const DEFAULT_CONFIG_PATHS = [process.env['FLUXER_CONFIG']].filter((path): path is string => Boolean(path));
+
+let cachedConfig: MasterConfig | null = null;
+
+export async function loadConfig(configPaths: Array<string> = DEFAULT_CONFIG_PATHS): Promise<MasterConfig> {
+	if (cachedConfig) {
+		return cachedConfig;
+	}
+
+	if (configPaths.length === 0) {
+		throw new Error('FLUXER_CONFIG must be set to a JSON config path.');
+	}
+
+	const configPath = configPaths.find((path) => existsSync(path));
+
+	if (!configPath) {
+		throw new Error(`No config file found. Checked FLUXER_CONFIG paths: ${configPaths.join(', ')}`);
+	}
+
+	const raw = loadJsonFile(configPath);
+	const envOverrides = buildEnvOverrides(process.env, 'FLUXER_CONFIG__');
+	const merged = deepMerge(raw, envOverrides);
+	delete merged['$schema'];
+
+	const parsedConfig = MasterConfigSchema.parse(merged);
+	const derived = deriveEndpointsFromDomain(parsedConfig.domain);
+	const overrides = parsedConfig.endpoint_overrides ?? {};
+	const endpoints = {...derived, ...overrides};
+
+	cachedConfig = {...parsedConfig, endpoints} as MasterConfig;
+	return cachedConfig;
+}
+
+export function getConfig(): MasterConfig {
+	if (!cachedConfig) {
+		throw new Error('Config not loaded. Call loadConfig() first.');
+	}
+	return cachedConfig;
+}
+
+export function resetConfig(): void {
+	cachedConfig = null;
+}