ionic-logging-service
Version:
Logging functionalities for apps built with Ionic framework
167 lines • 22.3 kB
JavaScript
import { EventEmitter, Injectable } from "@angular/core";
import * as log4javascript from "log4javascript";
import { AjaxAppender } from "./ajax-appender.model";
import { LocalStorageAppender } from "./local-storage-appender.model";
import { LogLevelConverter } from "./log-level.converter";
import { Logger } from "./logger.model";
import { MemoryAppender } from "./memory-appender.model";
import * as i0 from "@angular/core";
/**
* Service for logging functionality.
*
* By default, the following settings are used:
* - logger: root with level WARN
* - appender: BrowserConsoleAppender with threshold DEBUG and MemoryAppender with threshold ALL
*
* Via [configure](#configure), it is possible to amend these settings.
*/
export class LoggingService {
/**
* Creates a new instance of the service.
*/
constructor() {
// prevent log4javascript to show alerts on case of errors
log4javascript.logLog.setQuietMode(true);
// create event emitter
this.logMessagesChanged = new EventEmitter();
this.ajaxAppenderFailed = new EventEmitter();
// configure appender
const logger = log4javascript.getRootLogger();
logger.setLevel(log4javascript.Level.WARN);
// browser console appender for debugger
this.browserConsoleAppender = new log4javascript.BrowserConsoleAppender();
this.browserConsoleAppender.setLayout(new log4javascript.PatternLayout("%d{HH:mm:ss,SSS} %c %m"));
this.browserConsoleAppender.setThreshold(log4javascript.Level.ALL);
logger.addAppender(this.browserConsoleAppender);
// in-memory appender for display on log messages page
this.memoryAppender = new MemoryAppender();
this.memoryAppender.setLayout(new log4javascript.PatternLayout("%d{HH:mm:ss,SSS} %c %m"));
this.memoryAppender.setOnLogMessagesChangedCallback((message) => {
this.logMessagesChanged.emit();
});
logger.addAppender(this.memoryAppender);
this.configure();
}
/**
* Configures the logging depending on the given configuration.
*
* @param configuration configuration data.
*/
configure(configuration) {
if (typeof configuration === "undefined") {
configuration = {};
}
// set log levels
if (typeof configuration.logLevels !== "undefined") {
for (const level of configuration.logLevels) {
let logger;
if (level.loggerName === "root") {
logger = log4javascript.getRootLogger();
}
else {
logger = log4javascript.getLogger(level.loggerName);
}
try {
logger.setLevel(LogLevelConverter.levelToLog4Javascript(LogLevelConverter.levelFromString(level.logLevel)));
}
catch (e) {
throw new Error(`invalid log level ${level.logLevel}`);
}
}
}
// configure AjaxAppender
if (typeof configuration.ajaxAppender !== "undefined") {
const ajaxAppender = new AjaxAppender(configuration.ajaxAppender);
ajaxAppender.appenderFailed.subscribe((message) => {
this.ajaxAppenderFailed.emit(message);
});
log4javascript.getRootLogger().addAppender(ajaxAppender);
}
// configure LocalStorageAppender
if (typeof configuration.localStorageAppender !== "undefined") {
const localStorageAppender = new LocalStorageAppender(configuration.localStorageAppender);
log4javascript.getRootLogger().addAppender(localStorageAppender);
// ensure that an eventual memoryAppender is behind the localStorageAppender
const appenders = new Logger().getInternalLogger().getEffectiveAppenders();
const memoryAppender = appenders.find((a) => a.toString() === "Ionic.Logging.MemoryAppender");
if (memoryAppender) {
log4javascript.getRootLogger().removeAppender(memoryAppender);
log4javascript.getRootLogger().addAppender(memoryAppender);
}
}
// configure MemoryAppender
if (configuration.memoryAppender) {
this.memoryAppender.configure(configuration.memoryAppender);
}
// configure BrowserConsoleAppender
if (configuration.browserConsoleAppender) {
if (configuration.browserConsoleAppender.threshold) {
const convertedThreshold = LogLevelConverter.levelToLog4Javascript(LogLevelConverter.levelFromString(configuration.browserConsoleAppender.threshold));
this.browserConsoleAppender.setThreshold(convertedThreshold);
}
}
}
/**
* Gets the root logger from which all other loggers derive.
*
* @return root logger
*/
getRootLogger() {
return new Logger();
}
/**
* Gets a logger with the specified name, creating it if a logger with that name does not already exist.
*
* @param loggerName name of the logger
* @return logger
*/
getLogger(loggerName) {
return new Logger(loggerName);
}
/**
* Gets the last log messages.
*
* The log messages are retrieved from the internal [MemoryAppender](../memoryappender.html).
* That means you will get only the most current messages. The number of the messages is limited
* by its maxMessages value.
*
* @return log messages
*/
getLogMessages() {
return this.memoryAppender.getLogMessages();
}
/**
* Loads the log messages written by the LocalStorageAppender with the given key.
*
* @param localStorageKey key for the local storage
* @returns log messages
*/
getLogMessagesFromLocalStorage(localStorageKey) {
return LocalStorageAppender.loadLogMessages(localStorageKey);
}
/**
* Remove all log messages.
*/
removeLogMessages() {
this.memoryAppender.removeLogMessages();
this.logMessagesChanged.emit();
}
/**
* Removes the log messages written by the LocalStorageAppender with the given key.
*
* @param localStorageKey key for the local storage
*/
removeLogMessagesFromLocalStorage(localStorageKey) {
LocalStorageAppender.removeLogMessages(localStorageKey);
this.logMessagesChanged.emit();
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "17.2.2", ngImport: i0, type: LoggingService, deps: [], target: i0.ɵɵFactoryTarget.Injectable }); }
static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "17.2.2", ngImport: i0, type: LoggingService, providedIn: "root" }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "17.2.2", ngImport: i0, type: LoggingService, decorators: [{
type: Injectable,
args: [{
providedIn: "root"
}]
}], ctorParameters: () => [] });
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{ EventEmitter, Injectable, Optional } from \"@angular/core\";\n\nimport * as log4javascript from \"log4javascript\";\n\nimport { AjaxAppender } from \"./ajax-appender.model\";\nimport { LocalStorageAppender } from \"./local-storage-appender.model\";\nimport { LogLevelConverter } from \"./log-level.converter\";\nimport { LogMessage } from \"./log-message.model\";\nimport { Logger } from \"./logger.model\";\nimport { LoggingServiceConfiguration } from \"./logging-service.configuration\";\nimport { MemoryAppender } from \"./memory-appender.model\";\n\n/**\n * Service for logging functionality.\n *\n * By default, the following settings are used:\n *  - logger: root with level WARN\n *  - appender: BrowserConsoleAppender with threshold DEBUG and MemoryAppender with threshold ALL\n *\n * Via [configure](#configure), it is possible to amend these settings.\n */\n@Injectable({\n\tprovidedIn: \"root\"\n})\nexport class LoggingService {\n\n\t/**\n\t * Event triggered when the log messages got (potentially) change.\n\t * This can happen when:\n\t * - new message was added\n\t * - all message where removed from memory\n\t * - all massages where removed for one spcific LocalStorageAppender\n\t */\n\tpublic logMessagesChanged: EventEmitter<void>;\n\n\t/**\n\t * Event triggered when ajax appender could not send log messages to the server.\n\t *\n\t * @param message error message\n\t */\n\tpublic ajaxAppenderFailed: EventEmitter<string>;\n\n\tprivate memoryAppender: MemoryAppender;\n\tprivate browserConsoleAppender: log4javascript.BrowserConsoleAppender;\n\n\t/**\n\t * Creates a new instance of the service.\n\t */\n\tconstructor() {\n\n\t\t// prevent log4javascript to show alerts on case of errors\n\t\tlog4javascript.logLog.setQuietMode(true);\n\n\t\t// create event emitter\n\t\tthis.logMessagesChanged = new EventEmitter<void>();\n\t\tthis.ajaxAppenderFailed = new EventEmitter<string>();\n\n\t\t// configure appender\n\t\tconst logger = log4javascript.getRootLogger();\n\t\tlogger.setLevel(log4javascript.Level.WARN);\n\n\t\t// browser console appender for debugger\n\t\tthis.browserConsoleAppender = new log4javascript.BrowserConsoleAppender();\n\t\tthis.browserConsoleAppender.setLayout(new log4javascript.PatternLayout(\"%d{HH:mm:ss,SSS} %c %m\"));\n\t\tthis.browserConsoleAppender.setThreshold(log4javascript.Level.ALL);\n\t\tlogger.addAppender(this.browserConsoleAppender);\n\n\t\t// in-memory appender for display on log messages page\n\t\tthis.memoryAppender = new MemoryAppender();\n\t\tthis.memoryAppender.setLayout(new log4javascript.PatternLayout(\"%d{HH:mm:ss,SSS} %c %m\"));\n\t\tthis.memoryAppender.setOnLogMessagesChangedCallback((message) => {\n\t\t\tthis.logMessagesChanged.emit();\n\t\t});\n\t\tlogger.addAppender(this.memoryAppender);\n\n\t\tthis.configure();\n\t}\n\n\t/**\n\t * Configures the logging depending on the given configuration.\n\t *\n\t * @param configuration configuration data.\n\t */\n\tpublic configure(configuration?: LoggingServiceConfiguration): void {\n\n\t\tif (typeof configuration === \"undefined\") {\n\t\t\tconfiguration = {};\n\t\t}\n\n\t\t// set log levels\n\t\tif (typeof configuration.logLevels !== \"undefined\") {\n\t\t\tfor (const level of configuration.logLevels) {\n\t\t\t\tlet logger: log4javascript.Logger;\n\t\t\t\tif (level.loggerName === \"root\") {\n\t\t\t\t\tlogger = log4javascript.getRootLogger();\n\t\t\t\t} else {\n\t\t\t\t\tlogger = log4javascript.getLogger(level.loggerName);\n\t\t\t\t}\n\t\t\t\ttry {\n\t\t\t\t\tlogger.setLevel(LogLevelConverter.levelToLog4Javascript(LogLevelConverter.levelFromString(level.logLevel)));\n\t\t\t\t} catch (e) {\n\t\t\t\t\tthrow new Error(`invalid log level ${level.logLevel}`);\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t// configure AjaxAppender\n\t\tif (typeof configuration.ajaxAppender !== \"undefined\") {\n\t\t\tconst ajaxAppender = new AjaxAppender(configuration.ajaxAppender);\n\t\t\tajaxAppender.appenderFailed.subscribe((message: string) => {\n\t\t\t\tthis.ajaxAppenderFailed.emit(message);\n\t\t\t});\n\t\t\tlog4javascript.getRootLogger().addAppender(ajaxAppender);\n\t\t}\n\n\t\t// configure LocalStorageAppender\n\t\tif (typeof configuration.localStorageAppender !== \"undefined\") {\n\t\t\tconst localStorageAppender = new LocalStorageAppender(configuration.localStorageAppender);\n\t\t\tlog4javascript.getRootLogger().addAppender(localStorageAppender);\n\n\t\t\t// ensure that an eventual memoryAppender is behind the localStorageAppender\n\t\t\tconst appenders = new Logger().getInternalLogger().getEffectiveAppenders();\n\t\t\tconst memoryAppender = appenders.find((a) => a.toString() === \"Ionic.Logging.MemoryAppender\") as MemoryAppender;\n\t\t\tif (memoryAppender) {\n\t\t\t\tlog4javascript.getRootLogger().removeAppender(memoryAppender);\n\t\t\t\tlog4javascript.getRootLogger().addAppender(memoryAppender);\n\t\t\t}\n\t\t}\n\n\t\t// configure MemoryAppender\n\t\tif (configuration.memoryAppender) {\n\t\t\tthis.memoryAppender.configure(configuration.memoryAppender);\n\t\t}\n\n\t\t// configure BrowserConsoleAppender\n\t\tif (configuration.browserConsoleAppender) {\n\t\t\tif (configuration.browserConsoleAppender.threshold) {\n\t\t\t\tconst convertedThreshold = LogLevelConverter.levelToLog4Javascript(\n\t\t\t\t\tLogLevelConverter.levelFromString(configuration.browserConsoleAppender.threshold));\n\t\t\t\tthis.browserConsoleAppender.setThreshold(convertedThreshold);\n\t\t\t}\n\t\t}\n\n\t}\n\n\t/**\n\t * Gets the root logger from which all other loggers derive.\n\t *\n\t * @return root logger\n\t */\n\tpublic getRootLogger(): Logger {\n\t\treturn new Logger();\n\t}\n\n\t/**\n\t * Gets a logger with the specified name, creating it if a logger with that name does not already exist.\n\t *\n\t * @param loggerName name of the logger\n\t * @return logger\n\t */\n\tpublic getLogger(loggerName: string): Logger {\n\t\treturn new Logger(loggerName);\n\t}\n\n\t/**\n\t * Gets the last log messages.\n\t *\n\t * The log messages are retrieved from the internal [MemoryAppender](../memoryappender.html).\n\t * That means you will get only the most current messages. The number of the messages is limited\n\t * by its maxMessages value.\n\t *\n\t * @return log messages\n\t */\n\tpublic getLogMessages(): LogMessage[] {\n\t\treturn this.memoryAppender.getLogMessages();\n\t}\n\n\t/**\n\t * Loads the log messages written by the LocalStorageAppender with the given key.\n\t *\n\t * @param localStorageKey key for the local storage\n\t * @returns log messages\n\t */\n\tpublic getLogMessagesFromLocalStorage(localStorageKey: string): LogMessage[] {\n\t\treturn LocalStorageAppender.loadLogMessages(localStorageKey);\n\t}\n\n\t/**\n\t * Remove all log messages.\n\t */\n\tpublic removeLogMessages(): void {\n\t\tthis.memoryAppender.removeLogMessages();\n\t\tthis.logMessagesChanged.emit();\n\t}\n\n\t/**\n\t * Removes the log messages written by the LocalStorageAppender with the given key.\n\t *\n\t * @param localStorageKey key for the local storage\n\t */\n\tpublic removeLogMessagesFromLocalStorage(localStorageKey: string): void {\n\t\tLocalStorageAppender.removeLogMessages(localStorageKey);\n\t\tthis.logMessagesChanged.emit();\n\t}\n}\n"]}