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189 lines
8.2 KiB
TypeScript
189 lines
8.2 KiB
TypeScript
// Originally from Definitely Typed, see:
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// https://github.com/DefinitelyTyped/DefinitelyTyped/blob/b4683d7/types/loglevel/index.d.ts
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// Original definitions by: Stefan Profanter <https://github.com/Pro>
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// Gabor Szmetanko <https://github.com/szmeti>
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// Christian Rackerseder <https://github.com/screendriver>
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declare const log: log.RootLogger;
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export = log;
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declare namespace log {
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/**
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* Log levels
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*/
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interface LogLevel {
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TRACE: 0;
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DEBUG: 1;
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INFO: 2;
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WARN: 3;
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ERROR: 4;
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SILENT: 5;
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}
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/**
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* Possible log level numbers.
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*/
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type LogLevelNumbers = LogLevel[keyof LogLevel];
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/**
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* Possible log level descriptors, may be string, lower or upper case, or number.
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*/
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type LogLevelDesc = LogLevelNumbers
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| 'trace'
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| 'debug'
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| 'info'
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| 'warn'
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| 'error'
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| 'silent'
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| keyof LogLevel;
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type LoggingMethod = (...message: any[]) => void;
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type MethodFactory = (methodName: string, level: LogLevelNumbers, loggerName: string | symbol) => LoggingMethod;
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interface RootLogger extends Logger {
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/**
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* If you're using another JavaScript library that exposes a 'log' global, you can run into conflicts with loglevel.
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* Similarly to jQuery, you can solve this by putting loglevel into no-conflict mode immediately after it is loaded
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* onto the page. This resets to 'log' global to its value before loglevel was loaded (typically undefined), and
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* returns the loglevel object, which you can then bind to another name yourself.
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*/
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noConflict(): any;
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/**
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* This gets you a new logger object that works exactly like the root log object, but can have its level and
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* logging methods set independently. All loggers must have a name (which is a non-empty string or a symbol)
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* Calling * getLogger() multiple times with the same name will return an identical logger object.
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* In large applications, it can be incredibly useful to turn logging on and off for particular modules as you are
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* working with them. Using the getLogger() method lets you create a separate logger for each part of your
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* application with its own logging level. Likewise, for small, independent modules, using a named logger instead
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* of the default root logger allows developers using your module to selectively turn on deep, trace-level logging
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* when trying to debug problems, while logging only errors or silencing logging altogether under normal
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* circumstances.
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* @param name The name of the produced logger
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*/
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getLogger(name: string | symbol): Logger;
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/**
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* This will return you the dictionary of all loggers created with getLogger, keyed off of their names.
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*/
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getLoggers(): { [name: string]: Logger };
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/**
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* A .default property for ES6 default import compatibility
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*/
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default: RootLogger;
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}
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interface Logger {
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/**
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* Available log levels.
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*/
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readonly levels: LogLevel;
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/**
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* Plugin API entry point. This will be called for each enabled method each time the level is set
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* (including initially), and should return a MethodFactory to be used for the given log method, at the given level,
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* for a logger with the given name. If you'd like to retain all the reliability and features of loglevel, it's
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* recommended that this wraps the initially provided value of log.methodFactory
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*/
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methodFactory: MethodFactory;
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/**
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* Output trace message to console.
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* This will also include a full stack trace
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*
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* @param msg any data to log to the console
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*/
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trace(...msg: any[]): void;
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/**
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* Output debug message to console including appropriate icons
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*
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* @param msg any data to log to the console
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*/
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debug(...msg: any[]): void;
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/**
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* Output debug message to console including appropriate icons
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*
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* @param msg any data to log to the console
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*/
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log(...msg: any[]): void;
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/**
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* Output info message to console including appropriate icons
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*
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* @param msg any data to log to the console
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*/
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info(...msg: any[]): void;
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/**
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* Output warn message to console including appropriate icons
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*
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* @param msg any data to log to the console
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*/
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warn(...msg: any[]): void;
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/**
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* Output error message to console including appropriate icons
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*
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* @param msg any data to log to the console
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*/
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error(...msg: any[]): void;
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/**
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* This disables all logging below the given level, so that after a log.setLevel("warn") call log.warn("something")
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* or log.error("something") will output messages, but log.info("something") will not.
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*
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* @param level as a string, like 'error' (case-insensitive) or as a number from 0 to 5 (or as log.levels. values)
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* @param persist Where possible the log level will be persisted. LocalStorage will be used if available, falling
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* back to cookies if not. If neither is available in the current environment (i.e. in Node), or if you pass
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* false as the optional 'persist' second argument, persistence will be skipped.
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*/
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setLevel(level: LogLevelDesc, persist?: boolean): void;
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/**
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* Returns the current logging level, as a value from LogLevel.
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* It's very unlikely you'll need to use this for normal application logging; it's provided partly to help plugin
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* development, and partly to let you optimize logging code as below, where debug data is only generated if the
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* level is set such that it'll actually be logged. This probably doesn't affect you, unless you've run profiling
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* on your code and you have hard numbers telling you that your log data generation is a real performance problem.
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*/
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getLevel(): LogLevel[keyof LogLevel];
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/**
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* This sets the current log level only if one has not been persisted and can’t be loaded. This is useful when
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* initializing scripts; if a developer or user has previously called setLevel(), this won’t alter their settings.
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* For example, your application might set the log level to error in a production environment, but when debugging
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* an issue, you might call setLevel("trace") on the console to see all the logs. If that error setting was set
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* using setDefaultLevel(), it will still say as trace on subsequent page loads and refreshes instead of resetting
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* to error.
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*
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* The level argument takes is the same values that you might pass to setLevel(). Levels set using
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* setDefaultLevel() never persist to subsequent page loads.
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*
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* @param level as a string, like 'error' (case-insensitive) or as a number from 0 to 5 (or as log.levels. values)
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*/
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setDefaultLevel(level: LogLevelDesc): void;
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/**
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* This enables all log messages, and is equivalent to log.setLevel("trace").
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*
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* @param persist Where possible the log level will be persisted. LocalStorage will be used if available, falling
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* back to cookies if not. If neither is available in the current environment (i.e. in Node), or if you pass
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* false as the optional 'persist' second argument, persistence will be skipped.
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*/
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enableAll(persist?: boolean): void;
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/**
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* This disables all log messages, and is equivalent to log.setLevel("silent").
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*
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* @param persist Where possible the log level will be persisted. LocalStorage will be used if available, falling
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* back to cookies if not. If neither is available in the current environment (i.e. in Node), or if you pass
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* false as the optional 'persist' second argument, persistence will be skipped.
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*/
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disableAll(persist?: boolean): void;
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}
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}
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