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| 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 | 1x 1708x 1708x 1129x 1129x 1708x 1708x | import type { Writable } from 'type-fest';
import type { LogLevel } from './definition.ts';
/**
* Represents a structured log entry with timestamp and metadata.
*
* This type is used internally by formatters and sinks that need to work with structured log data. The timestamp is
* stored as milliseconds since epoch.
*/
export type LogEntry = {
/**
* The severity level of the log entry.
*/
readonly level: LogLevel;
/**
* Timestamp when the entry was created (milliseconds since epoch).
*/
readonly timestamp: number;
/**
* The formatted message content.
*/
readonly message: string;
/**
* Additional arguments provided with the log entry.
*/
readonly args?: readonly unknown[];
};
/**
* Creates a LogEntry object with the current timestamp.
*
* This utility function is used by formatters that need to work with structured log data including timestamps. The
* timestamp is automatically set to the current time.
*
* @example
*
* ```ts
* import { asLogEntry } from 'emitnlog/logger';
*
* const entry = asLogEntry('info', 'Operation completed', [{ duration: 150 }]);
* console.log(entry.timestamp); // Current timestamp in milliseconds
* ```
*
* @param level The log level
* @param message The log message
* @param args Additional arguments
* @returns A LogEntry object with current timestamp
*/
export const asLogEntry = (level: LogLevel, message: string, args?: readonly unknown[]): LogEntry => {
const entry: Writable<LogEntry> = { level, timestamp: Date.now(), message };
if (args?.length) {
entry.args = args;
}
return entry;
};
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