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<h1><a href="../../index.html">All files</a> / <a href="index.html">src/utils</a> logger.ts</h1>
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<div class='fl pad1y space-right2'>
<span class="strong">15.21% </span>
<span class="quiet">Statements</span>
<span class='fraction'>7/46</span>
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<div class='fl pad1y space-right2'>
<span class="strong">14.28% </span>
<span class="quiet">Branches</span>
<span class='fraction'>3/21</span>
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<span class="strong">14.28% </span>
<span class="quiet">Functions</span>
<span class='fraction'>2/14</span>
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<span class="strong">15.21% </span>
<span class="quiet">Lines</span>
<span class='fraction'>7/46</span>
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">/**
* Log levels
*/
export enum LogLevel {
DEBUG = 0,
INFO = 1,
WARN = 2,
ERROR = 3
}
/**
* Logger options
*/
export interface LoggerOptions {
level: LogLevel;
prefix?: string;
timestamp?: boolean;
console?: boolean;
file?: string;
}
/**
* Logger
* Provides structured logging capabilities
*/
export class Logger {
private options: LoggerOptions;
constructor(options: Partial<LoggerOptions> = {}) {
this.options = {
level: LogLevel.INFO,
prefix: '',
timestamp: true,
console: true,
...options
};
}
/**
* Log a debug message
*/
public <span class="fstat-no" title="function not covered" >debug(</span>message: string, ...args: any[]): void {
<span class="cstat-no" title="statement not covered" > this.log(LogLevel.DEBUG, message, ...args);</span>
}
/**
* Log an info message
*/
public <span class="fstat-no" title="function not covered" >info(</span>message: string, ...args: any[]): void {
<span class="cstat-no" title="statement not covered" > this.log(LogLevel.INFO, message, ...args);</span>
}
/**
* Log a warning message
*/
public <span class="fstat-no" title="function not covered" >warn(</span>message: string, ...args: any[]): void {
<span class="cstat-no" title="statement not covered" > this.log(LogLevel.WARN, message, ...args);</span>
}
/**
* Log an error message
*/
public <span class="fstat-no" title="function not covered" >error(</span>message: string | Error, ...args: any[]): void {
<span class="cstat-no" title="statement not covered" > if (message instanceof Error) {</span>
<span class="cstat-no" title="statement not covered" > this.log(LogLevel.ERROR, message.message, ...args, { stack: message.stack });</span>
} else {
<span class="cstat-no" title="statement not covered" > this.log(LogLevel.ERROR, message, ...args);</span>
}
}
/**
* Log a message with the specified level
*/
private <span class="fstat-no" title="function not covered" >log(</span>level: LogLevel, message: string, ...args: any[]): void {
// Check if level is enabled
<span class="cstat-no" title="statement not covered" > <span class="missing-if-branch" title="if path not taken" >I</span>if (level < this.options.level) {</span>
<span class="cstat-no" title="statement not covered" > return;</span>
}
// Format message
const formattedMessage = <span class="cstat-no" title="statement not covered" >this.formatMessage(level, message);</span>
// Log to console
<span class="cstat-no" title="statement not covered" > <span class="missing-if-branch" title="if path not taken" >I</span>if (this.options.console) {</span>
<span class="cstat-no" title="statement not covered" > this.logToConsole(level, formattedMessage, ...args);</span>
}
// Log to file (not implemented yet)
<span class="cstat-no" title="statement not covered" > <span class="missing-if-branch" title="if path not taken" >I</span>if (this.options.file) {</span>
// TODO: Implement file logging
}
}
/**
* Format a log message
*/
private <span class="fstat-no" title="function not covered" >formatMessage(</span>level: LogLevel, message: string): string {
const parts: string[] = <span class="cstat-no" title="statement not covered" >[];</span>
// Add timestamp
<span class="cstat-no" title="statement not covered" > <span class="missing-if-branch" title="if path not taken" >I</span>if (this.options.timestamp) {</span>
<span class="cstat-no" title="statement not covered" > parts.push(new Date().toISOString());</span>
}
// Add level
<span class="cstat-no" title="statement not covered" > parts.push(this.getLevelString(level));</span>
// Add prefix
<span class="cstat-no" title="statement not covered" > <span class="missing-if-branch" title="if path not taken" >I</span>if (this.options.prefix) {</span>
<span class="cstat-no" title="statement not covered" > parts.push(`[${this.options.prefix}]`);</span>
}
// Add message
<span class="cstat-no" title="statement not covered" > parts.push(message);</span>
<span class="cstat-no" title="statement not covered" > return parts.join(' ');</span>
}
/**
* Log to console
*/
private <span class="fstat-no" title="function not covered" >logToConsole(</span>level: LogLevel, message: string, ...args: any[]): void {
<span class="cstat-no" title="statement not covered" > switch (level) {</span>
case LogLevel.DEBUG:
<span class="cstat-no" title="statement not covered" > console.debug(message, ...args);</span>
<span class="cstat-no" title="statement not covered" > break;</span>
case LogLevel.INFO:
<span class="cstat-no" title="statement not covered" > console.info(message, ...args);</span>
<span class="cstat-no" title="statement not covered" > break;</span>
case LogLevel.WARN:
<span class="cstat-no" title="statement not covered" > console.warn(message, ...args);</span>
<span class="cstat-no" title="statement not covered" > break;</span>
case LogLevel.ERROR:
<span class="cstat-no" title="statement not covered" > console.error(message, ...args);</span>
<span class="cstat-no" title="statement not covered" > break;</span>
}
}
/**
* Get string representation of log level
*/
private <span class="fstat-no" title="function not covered" >getLevelString(</span>level: LogLevel): string {
<span class="cstat-no" title="statement not covered" > switch (level) {</span>
case LogLevel.DEBUG:
<span class="cstat-no" title="statement not covered" > return '[DEBUG]';</span>
case LogLevel.INFO:
<span class="cstat-no" title="statement not covered" > return '[INFO]';</span>
case LogLevel.WARN:
<span class="cstat-no" title="statement not covered" > return '[WARN]';</span>
case LogLevel.ERROR:
<span class="cstat-no" title="statement not covered" > return '[ERROR]';</span>
default:
<span class="cstat-no" title="statement not covered" > return '[UNKNOWN]';</span>
}
}
/**
* Create a child logger with a different prefix
*/
public <span class="fstat-no" title="function not covered" >child(</span>prefix: string): Logger {
<span class="cstat-no" title="statement not covered" > return new Logger({</span>
...this.options,
prefix: this.options.prefix
? `${this.options.prefix}:${prefix}`
: prefix
});
}
/**
* Set log level
*/
public <span class="fstat-no" title="function not covered" >setLevel(</span>level: LogLevel): void {
<span class="cstat-no" title="statement not covered" > this.options.level = level;</span>
}
/**
* Get current log level
*/
public <span class="fstat-no" title="function not covered" >getLevel(</span>): LogLevel {
<span class="cstat-no" title="statement not covered" > return this.options.level;</span>
}
/**
* Check if a level is enabled
*/
public <span class="fstat-no" title="function not covered" >isLevelEnabled(</span>level: LogLevel): boolean {
<span class="cstat-no" title="statement not covered" > return level >= this.options.level;</span>
}
}
// Create default logger
export const logger = new Logger();
</pre></td></tr></table></pre>
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