import { readFileSync, writeFileSync, mkdirSync, chmodSync } from "node:fs";
import { dirname, resolve } from "node:path";
import { homedir } from "node:os";
import type { AppConfig, ConnectionConfig } from "./types.js";
const CONFIG_DIR = resolve(homedir(), ".bank-mcp");
const CONFIG_PATH = resolve(CONFIG_DIR, "config.json");
const DEFAULT_CONFIG: AppConfig = {
version: 1,
connections: [],
defaults: { transactionDays: 90, currency: "PLN" },
};
export function getConfigPath(): string {
return CONFIG_PATH;
}
export function loadConfig(): AppConfig {
// Mock mode: return a synthetic config with mock provider
if (process.env.BANK_MCP_MOCK === "1") {
return {
version: 1,
connections: [
{
id: "mock",
provider: "mock",
label: "Mock Bank (Demo)",
config: {},
},
],
defaults: { transactionDays: 90, currency: "PLN" },
};
}
try {
const raw = readFileSync(CONFIG_PATH, "utf-8");
return JSON.parse(raw) as AppConfig;
} catch {
return { ...DEFAULT_CONFIG, connections: [] };
}
}
export function saveConfig(config: AppConfig): void {
mkdirSync(CONFIG_DIR, { recursive: true });
const data = JSON.stringify(config, null, 2) + "\n";
writeFileSync(CONFIG_PATH, data, { mode: 0o600 });
// Ensure permissions even if file existed
chmodSync(CONFIG_PATH, 0o600);
}
export function getConnection(
config: AppConfig,
connectionId?: string,
): ConnectionConfig {
if (config.connections.length === 0) {
throw new Error("No connections configured. Run: npx @bank-mcp/server init");
}
if (connectionId) {
const conn = config.connections.find((c) => c.id === connectionId);
if (!conn) {
const ids = config.connections.map((c) => c.id).join(", ");
throw new Error(
`Connection "${connectionId}" not found. Available: ${ids}`,
);
}
return conn;
}
// Default to first connection
return config.connections[0];
}
export function getAllConnections(config: AppConfig): ConnectionConfig[] {
return config.connections;
}
/**
* Expand ~ in paths within a config object.
*/
export function expandPaths(config: Record<string, unknown>): Record<string, unknown> {
const home = homedir();
const result: Record<string, unknown> = {};
for (const [key, value] of Object.entries(config)) {
if (typeof value === "string" && value.startsWith("~")) {
result[key] = value.replace(/^~/, home);
} else {
result[key] = value;
}
}
return result;
}
