hlogger/lib/system.js

var LogAdapter = require('./adapter');
var LogWriter = require('./writer');


var LoggerSystem = class LoggerSystem {
	
	constructor() {
		this.adapters = [];
		this.writers = {};
		this.loggerLevels = {};
		// Prepare TAGS
		
		// Global log count? per log

		// Stuff to replace
		this.logFmt = "[%c]:%t: %m %e";
	}
	writer(name,writer) {
		this.writers[name]= writer;
	}
	adapter(adapter) {
		if(!adapter instanceof LogAdapter) {
			throw Error("Should be an adapter");
		}
		this.adapters.push(adapter);
		return adapter;
	}
	clear() {
		this.adapters = [];
	}

	solveLevels(logger,levels) {
		
		// If emptu all ok
		for(var k in levels) {
			if(logger.name.match(new RegExp("^" + k + "$"))) {
				return levels[k];
			}
		}
		return null;
	}
	base(logger,TAG,msg) {
		var self = this;
		var sTAG = LoggerSystem.TAGS[TAG];
		var gLevels = this.solveLevels(logger,this.loggerLevels);

		for(var a of this.adapters) {
			var aLevels = this.solveLevels(logger,a.loggerLevels);
			if(aLevels && !aLevels.includes(sTAG)) {
				return;
			}
			if(gLevels && !gLevels.includes(sTAG)) {
				return;
			}
			// is performance good?
			// Check if this adapter has conf
			if(a.filterFunc(TAG)) {
				a.writers.forEach(function(w) {
					var fmt = a.fmt;
					if(fmt==undefined ) {
						if(w.fmt != undefined && w.fmt[sTAG] != undefined) {
							fmt = w.fmt[LoggerSystem.TAGS[TAG]];
						}
					}
					var outmsg = self.format(TAG,w.count,logger.name,w.lastTime,logger.lastTime,fmt,msg);

					// Strip ansi if any
					w.doLog(outmsg);
				});
			}
		};
	}

	// Improve and clean this	
	format(TAG,count,name,lastDate, lastLoggerDate, fmt, msg) {
		if(fmt == undefined) fmt = this.logFmt; // Overall default format
		var now = new Date();
		var dateStr = (("0" + now.getDate()).slice(-2) 
									+ "-" + ("0" +now.getMonth()).slice(-2) 
									+ "-" + now.getFullYear() 
									+ " " + ("0" + now.getHours()).slice(-2) 
									+ ":" + ("0" + now.getMinutes()).slice(-2) 
									+ ":" + ("0"+now.getSeconds()).slice(-2)) ;
		var dateDiff = (now - lastDate);
		var dateDiffStr = dateDiff + "ms";
		if(dateDiff>1000) dateDiffStr = (dateDiff / 1000).toFixed(2) + "s";

		var ldateDiffhr = process.hrtime(lastLoggerDate);
		var ldateDiff = ( ldateDiffhr[0] * 1000000 + ldateDiffhr[1] / 1000 ) / 1000;
		var ldateDiffStr = "";
		if(ldateDiff > 1000) 
			ldateDiffStr = (ldateDiff / 1000).toFixed(2) + "s";
		else {
			ldateDiffStr = ldateDiff.toFixed(2) +"ms";
		}

		var s = fmt;
		s = s.replace(/%c/g,count);
		s = s.replace(/%m/g,msg); 
		s = s.replace(/%l/g,LoggerSystem.TAGS[TAG]);
		s = s.replace(/%n/g,name); 
		s = s.replace(/%e/g,"+" +dateDiffStr); 
		s = s.replace(/%E/g,"+" +ldateDiffStr); 
		s = s.replace(/%t/g,dateStr);
		s = s.replace(/%%/g,"%"); 
		s = s.replace(/%a/g,"\x1b");
		

		var logSplit = s.split("%|");
		// Might be sloooww
		if(logSplit.length == 2) {
			var ansiRegex = /[\u001b\u009b][[()#;?]*(?:[0-9]{1,4}(?:;[0-9]{0,4})*)?[0-9A-ORZcf-nqry=><]/g;

			var llen = logSplit[0].replace(ansiRegex,"").length;
			var rlen = logSplit[1].replace(ansiRegex,"").length+1;

			// Only works if it has columns else just give some default
			var col = process.stdout.columns || 80;
			var pad = col - llen -rlen;

			s = logSplit[0];
			for(var i = 0;i<pad;i++) { s+=" "; }
			s+= " "+logSplit[1];
		}
		
		return s;
	}
}


LoggerSystem.TAGS = ["ERROR","WARN","INFO","VERBOSE"];

module.exports = LoggerSystem;