Clément SAILLANT
111 lines
2.6 KiB
TypeScript
111 lines
2.6 KiB
TypeScript
/**
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* Logger for KiCAD MCP server
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*/
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import { existsSync, mkdirSync, appendFileSync } from 'fs';
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import { join } from 'path';
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import * as os from 'os';
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// Log levels
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type LogLevel = 'error' | 'warn' | 'info' | 'debug';
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// Default log directory
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const DEFAULT_LOG_DIR = join(os.homedir(), '.kicad-mcp', 'logs');
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/**
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* Logger class for KiCAD MCP server
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*/
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class Logger {
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private logLevel: LogLevel = 'warn';
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private logDir: string = DEFAULT_LOG_DIR;
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/**
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* Set the log level
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* @param level Log level to set
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*/
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setLogLevel(level: LogLevel): void {
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this.logLevel = level;
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}
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/**
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* Set the log directory
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* @param dir Directory to store log files
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*/
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setLogDir(dir: string): void {
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this.logDir = dir;
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// Ensure log directory exists
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if (!existsSync(this.logDir)) {
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mkdirSync(this.logDir, { recursive: true });
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}
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}
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/**
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* Log an error message
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* @param message Message to log
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*/
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error(message: string): void {
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this.log('error', message);
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}
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/**
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* Log a warning message
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* @param message Message to log
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*/
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warn(message: string): void {
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if (['error', 'warn', 'info', 'debug'].includes(this.logLevel)) {
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this.log('warn', message);
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}
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}
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/**
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* Log an info message
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* @param message Message to log
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*/
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info(message: string): void {
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if (['info', 'debug'].includes(this.logLevel)) {
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this.log('info', message);
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}
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}
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/**
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* Log a debug message
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* @param message Message to log
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*/
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debug(message: string): void {
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if (this.logLevel === 'debug') {
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this.log('debug', message);
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}
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}
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/**
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* Log a message with the specified level
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* @param level Log level
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* @param message Message to log
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*/
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private log(level: LogLevel, message: string): void {
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const timestamp = new Date().toISOString();
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const formattedMessage = `[${timestamp}] [${level.toUpperCase()}] ${message}`;
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// Log to console.error (stderr) only - stdout is reserved for MCP protocol
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// All log levels go to stderr to avoid corrupting STDIO MCP transport
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console.error(formattedMessage);
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// Log to file
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try {
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// Ensure log directory exists
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if (!existsSync(this.logDir)) {
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mkdirSync(this.logDir, { recursive: true });
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}
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const logFile = join(this.logDir, `kicad-mcp-${new Date().toISOString().split('T')[0]}.log`);
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appendFileSync(logFile, formattedMessage + '\n');
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} catch (error) {
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console.error(`Failed to write to log file: ${error}`);
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}
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}
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}
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// Create and export logger instance
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export const logger = new Logger();
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