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A inheritable and subscribable logger util.
This script should not be not be installed directly. It is a library for other scripts to include with the meta directive // @require https://update.greasyfork.org/scripts/441386/1027348/CKLogger.js
// ==UserScript==
// @name CKLogger
// @namespace ckylin-script-lib-logger
// @version 1.0
// @match http://*
// @match https://*
// @author CKylinMC
// @license GPLv3 License
// @grant none
// ==/UserScript==
(function(){
if(typeof(this.unsafeWindow)==='undefined'){
unsafeWindow = window;
}
class Logger{
static getStack(){
return new Error().stack.substr(7);
}
constructor(loggerName='LOG', parent=null){
this.name = loggerName;
this.parent = parent;
this.visible = this.parent?null:true;
this.serviceProvider = console;
this.subscribers = [];
}
trigger(opt){
this.subscribers.filter(subscriber=>{
if(!this.isVisible() || !opt.visible){
if(subscriber.onlyVisible)return false;
}
if(opt.fromSub){
if(!subscriber.includeSubLoggers)return false;
}
return subscriber.levels.includes(opt.level);
}).forEach(subscriber=>{
try{
subscriber.onlog(opt.level,opt.name,...opt.args);
}catch(e){}
});
if(this.parent){
opt.fromSub = true;
this.parent.trigger(opt);
}
}
subscribe(options){
const opt = Object.assign({
onlyVisible: false,
includeSubLoggers: true,
levels: ['log','info','error','warn','debug'],
onlog: (level,namespace,...args)=>{}
},options);
this.subscribers.push(opt);
return opt;
}
unsubscribe(obj){
if(this.subscribers.includes(obj)){
return this.subscribers.splice(this.subscribers.indexOf(obj),1);
} return null;
}
isVisible(){
if(this.visible===null){
if(this.parent&&this.parent.isVisible){
return this.parent.isVisible();
} else return true;
}
return this.visible;
}
setVisible(yes=true){
this.visible = yes;
}
getSubLogger(subName=null){
return new Logger(subName, this);
}
getName(){
return `${this.parent?this.parent.getName()+'/':''}${this.name}`;
}
getFormattedName(){
return `[${this.getName()}]`
}
sendLogs(subMethod,...contents){
this.trigger({
level: 'raw',
fromSub: false,
visible: this.isVisible(),
name: this.getName(),
args: contents
});
if(this.isVisible()){
if(this.serviceProvider.hasOwnProperty(subMethod)){
this.serviceProvider[subMethod](...contents);
return true;
}
}
return false;
}
log(...args){
this.trigger({
level: 'log',
fromSub: false,
visible: this.isVisible(),
name: this.getName(),
args: args
});
return this.sendLogs('log',this.getFormattedName(),...args);
}
info(...args){
this.trigger({
level: 'info',
fromSub: false,
visible: this.isVisible(),
name: this.getName(),
args: args
});
return this.sendLogs('info',this.getFormattedName(),...args);
}
warn(...args){
this.trigger({
level: 'warn',
fromSub: false,
visible: this.isVisible(),
name: this.getName(),
args: args
});
const stacks = '\nTrace:\n'+Logger.getStack().split('\n').splice(2).join('\n');
return this.sendLogs('warn',this.getFormattedName(),...args,stacks);
}
error(...args){
this.trigger({
level: 'error',
fromSub: false,
visible: this.isVisible(),
name: this.getName(),
args: args
});
const stacks = '\nTrace:\n'+Logger.getStack().split('\n').splice(2).join('\n');
return this.sendLogs('error',this.getFormattedName(),...args,stacks);
}
debug(...args){
this.trigger({
level: 'debug',
fromSub: false,
visible: this.isVisible(),
name: this.getName(),
args: args
});
const stacks = '\nTrace:\n'+Logger.getStack().split('\n').splice(2).join('\n');
return this.sendLogs('debug',this.getFormattedName(),...args,stacks);
}
send(methodName,...args){
this.trigger({
level: methodName,
fromSub: false,
visible: this.isVisible(),
name: this.getName(),
args: args
});
return this.sendLogs(methodName,this.getFormattedName(),...args);
}
}
unsafeWindow.Logger=Logger;
unsafeWindow.logger=new Logger;
})();