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d0ded63 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 | /**
* Structured logging module for enhanced observability
* Logs with severity levels, component tracking, and metrics
*/
type LogLevel = 'debug' | 'info' | 'warn' | 'error';
interface LogEntry {
timestamp: string;
level: LogLevel;
component: string;
message: string;
duration?: number; // milliseconds
error?: string;
metadata?: Record<string, unknown>;
}
class Logger {
private isProduction = typeof process !== 'undefined' && process.env.NODE_ENV === 'production';
/**
* Log a message with timestamp and component context
*/
private log(level: LogLevel, component: string, message: string, metadata?: Record<string, unknown>) {
const entry: LogEntry = {
timestamp: new Date().toISOString(),
level,
component,
message,
metadata,
};
const prefix = `[${component}]`;
const formattedMessage = `${prefix} ${message}`;
const logWithMetadata = (consoleFn: typeof console.error) => {
if (metadata && Object.keys(metadata).length > 0) {
consoleFn(formattedMessage, metadata);
} else {
consoleFn(formattedMessage);
}
};
switch (level) {
case 'error':
logWithMetadata(console.error);
break;
case 'warn':
logWithMetadata(console.warn);
break;
case 'info':
if (!this.isProduction) {
logWithMetadata(console.log);
}
break;
case 'debug':
if (!this.isProduction) {
logWithMetadata(console.debug);
}
break;
}
}
/**
* Log debug message (development only)
*/
debug(component: string, message: string, metadata?: Record<string, unknown>) {
this.log('debug', component, message, metadata);
}
/**
* Log info message
*/
info(component: string, message: string, metadata?: Record<string, unknown>) {
this.log('info', component, message, metadata);
}
/**
* Log warning message
*/
warn(component: string, message: string, metadata?: Record<string, unknown>) {
this.log('warn', component, message, metadata);
}
/**
* Log error with optional error object
*/
error(component: string, message: string, error?: Error | unknown, metadata?: Record<string, unknown>) {
const errorMetadata = {
...metadata,
...(error instanceof Error && {
errorMessage: error.message,
errorStack: error.stack,
}),
};
this.log('error', component, message, errorMetadata);
}
/**
* Measure performance of an async function and log duration
*/
async measureAsync<T>(
component: string,
operationName: string,
fn: () => Promise<T>,
): Promise<T> {
const start = performance.now();
try {
const result = await fn();
const duration = performance.now() - start;
this.debug(component, `${operationName} completed`, { duration: `${duration.toFixed(2)}ms` });
return result;
} catch (error) {
const duration = performance.now() - start;
this.error(component, `${operationName} failed`, error, { duration: `${duration.toFixed(2)}ms` });
throw error;
}
}
/**
* Measure performance of a sync function and log duration
*/
measureSync<T>(
component: string,
operationName: string,
fn: () => T,
): T {
const start = performance.now();
try {
const result = fn();
const duration = performance.now() - start;
this.debug(component, `${operationName} completed`, { duration: `${duration.toFixed(2)}ms` });
return result;
} catch (error) {
const duration = performance.now() - start;
this.error(component, `${operationName} failed`, error, { duration: `${duration.toFixed(2)}ms` });
throw error;
}
}
}
// Export singleton instance
export const logger = new Logger();
/**
* Helper for tracking async operation metrics
*/
export function createAsyncMetricsTracker(component: string, operationName: string) {
const start = performance.now();
return {
success: (metadata?: Record<string, unknown>) => {
const duration = performance.now() - start;
logger.info(component, `${operationName} succeeded`, { duration: `${duration.toFixed(2)}ms`, ...metadata });
},
error: (error: Error | unknown, metadata?: Record<string, unknown>) => {
const duration = performance.now() - start;
logger.error(component, `${operationName} failed`, error, { duration: `${duration.toFixed(2)}ms`, ...metadata });
},
};
}
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