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metaMessage.js
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const path = require('path');
const settings = require(path.join(__dirname,'settings'));
// Next line gets the location of the startup file, then uses that to find its logComponents.js file
const StartupPath = process.env.StartupPath;
const {logModules,produceNrSnapshotWhenError} = require(path.join(StartupPath,'logComponents'));
const LOG_TYPE = {'ALWAYS':{Code:'A', Color:'\x1b[33m'}, 'INFO':{Code:'I', Color:'\x1b[32m'}, 'VERBOSE':{Code:'V', Color:'\x1b[36m'}, 'WARNING':{Code:'W', Color:'\x1b[35m'}, 'ERROR':{Code:'E', Color:'\x1b[31m'}, 'FATAL':{Code:'F', Color:'\x1b[41m'}, 'DEBUG':{Code:'D', Color:'\x1b[36m'}}
const LOG_LEVEL = {'MUTED':[LOG_TYPE.ALWAYS], 'QUIET':[LOG_TYPE.ALWAYS,LOG_TYPE.FATAL, LOG_TYPE.ERROR],
'WARNING':[LOG_TYPE.ALWAYS,LOG_TYPE.FATAL, LOG_TYPE.ERROR, LOG_TYPE.WARNING],
'INFO': [LOG_TYPE.ALWAYS, LOG_TYPE.FATAL, LOG_TYPE.ERROR, LOG_TYPE.WARNING, LOG_TYPE.INFO],
'VERBOSE': [LOG_TYPE.ALWAYS, LOG_TYPE.FATAL, LOG_TYPE.ERROR, LOG_TYPE.WARNING, LOG_TYPE.INFO, LOG_TYPE.VERBOSE],
'DEBUG': [LOG_TYPE.ALWAYS, LOG_TYPE.FATAL, LOG_TYPE.ERROR, LOG_TYPE.WARNING, LOG_TYPE.INFO, LOG_TYPE.VERBOSE,LOG_TYPE.DEBUG]
}
//Initialise Severity Level;
var mySeverity = null;
var mySeverityText = null;
var myComponents = [];
var forceDisplay = false;
var last_Error;
var messageStack=[];
var firstPos=0;
var nextPos=0;
var queuedItems=0;
const max_TimeForceDisplay = 1000;
var produceNrSnapshot = produceNrSnapshotWhenError;
if (produceNrSnapshot == undefined)
produceNrSnapshot = 200;
if (mySeverity == null) {
if (settings.LogSeverity) // Getting loglevel from the settigns.json file (note, can be overwritten by passing argument at runtime)
{ mySeverity = LOG_LEVEL[settings.LogSeverity];
mySeverityText = settings.LogSeverity; // Did the user override this setting during runtime?
}
else
{mySeverity == LOG_LEVEL.QUIET;
mySeverityText = "QUIET"
}
}
//metaMessage({component:"metaMessage",type:LOG_TYPE.ALWAYS, content:"Loglevel "+mySeverityText});
function getLoglevels(theModule = undefined)
{ try {
let logArray = [];
logArray.push({Name:"ALL",LOG_LEVEL:'',TextLevel:mySeverityText});
if (theModule != undefined && theModule.toUpperCase() != "ALL")
{ let CompIndex =myComponents.findIndex((Comp) => {return Comp.Name == theModule});
if (CompIndex!= -1)
{ logArray = []; // clear the "ALL" component
let bb = JSON.stringify(myComponents[CompIndex])
logArray.push(JSON.parse(bb));
logArray[logArray.length-1].LOG_LEVEL=''
}
}
else
{ logModules.MetaComponents.forEach((metaComponent) =>
{let CompIndex =myComponents.findIndex((Comp) => {return Comp.Name == metaComponent });
if (CompIndex!= -1)
{let bb = JSON.stringify(myComponents[CompIndex])
logArray.push(JSON.parse(bb));
logArray[logArray.length-1].LOG_LEVEL=''
}
else
{logArray.push({Name:metaComponent,LOG_LEVEL:"",TextLevel:"Following global"});
logArray[logArray.length-1].LOG_LEVEL='';
}
})
}
return logArray;
}
catch (err) {console.log(err)}
}
function OverrideLoglevel(NewLogLevel,Module) {
if (Module != undefined && Module != '')
{if (Module == "ALL")
{if (NewLogLevel=="")
{metaMessage({component:"metaMessage",type:LOG_TYPE.ALWAYS, content:"Cannot remove global loglevel "+mySeverityText});
return -4;
}
else
{if (NewLogLevel!="" && NewLogLevel != undefined) // First check if any supplied new loglevel is valid
if (LOG_LEVEL[NewLogLevel] == undefined)
{metaMessage({component:"metaMessage",type:LOG_TYPE.ALWAYS, content:"Invalid loglevel requested "+Module+": "+NewLogLevel});
return -12;
}
metaMessage({component:"metaMessage",type:LOG_TYPE.ALWAYS, content:"MetaCore is overriding global loglevel to "+NewLogLevel});
mySeverity = LOG_LEVEL[NewLogLevel];
mySeverityText = NewLogLevel;
return 0;
}
}
else
{if (NewLogLevel!="" && NewLogLevel != undefined) // First check if any supplied new loglevel is valid
if (LOG_LEVEL[NewLogLevel] == undefined)
{metaMessage({component:"metaMessage",type:LOG_TYPE.ALWAYS, content:"Invalid loglevel requested "+Module+": "+NewLogLevel});
return -12;
}
let CompIndex = myComponents.findIndex((Comp) => {return Comp.Name == Module });
let oldLogLevel = "''";
if (CompIndex!= -1) {
for (var i = myComponents.length - 1; i >= 0; i--) {
if (myComponents[i].Name === Module)
{oldLogLevel = myComponents[i].TextLevel;
metaMessage({component:"metaMessage",type:LOG_TYPE.ALWAYS, content:"Removing old loglevel "+ oldLogLevel + " for component "+Module});
myComponents.splice(i, 1);
}
}
}
if (NewLogLevel!="") // In case it is not a remove
{ metaMessage({component:"metaMessage",type:LOG_TYPE.ALWAYS, content:"Setting log for component "+Module+" from "+oldLogLevel+" to "+NewLogLevel});
myComponents.push({Name:Module,LOG_LEVEL:LOG_LEVEL[NewLogLevel],TextLevel:NewLogLevel});
return 8;
}
else
{metaMessage({component:"metaMessage",type:LOG_TYPE.ALWAYS, content:"Component "+Module+" is now following global loglevel "+mySeverityText});
return -12;
}
}
}
else
{metaMessage({component:"metaMessage",type:LOG_TYPE.ALWAYS, content:"MetaCore without module; overriding global loglevel to "+NewLogLevel})
mySeverity = LOG_LEVEL[NewLogLevel];
mySeverityText = NewLogLevel;
return 16;
}
}
function initialiseLogSeverity(sever)
{
mySeverity = LOG_LEVEL[sever];mySeverityText = sever;
if (mySeverity==undefined)
{metaMessage({component:"metaMessage",type:LOG_TYPE.ALWAYS, content:"Unknown Loglevel requested; 'QUIET' substituted "+sever})
mySeverity = LOG_LEVEL["QUIET"];mySeverityText = "QUIET";
}
metaMessage({component:"metaMessage",type:LOG_TYPE.VERBOSE, content:"inited Loglevel "+mySeverityText});
}
function initialiseLogComponents(comp)
{
myComponents = comp;
}
function metaMessageParamHandler(theArg)
{
if (Array.isArray(theArg))
console.log('\x1b[0m\x1b[2m', JSON.stringify(theArg), '\x1b[0m')
else
console.log('\x1b[0m\x1b[2m', theArg, '\x1b[0m')
}
function metaMessage(message)
{
try {
if ((message.type==LOG_TYPE.FATAL|| message.type==LOG_TYPE.ERROR )&&produceNrSnapshot)
{ let d = new Date();
if (last_Error == 0 || d.getTime() - last_Error > max_TimeForceDisplay)
console.log('\x1b[31m',"******** Message type =",message.type,"so we'll reproduce",produceNrSnapshot,"suppressed messages ********")
forceDisplay = true;
last_Error = d.getTime();
}
if (forceDisplay)
{ let d = new Date();
if (d.getTime() - last_Error < max_TimeForceDisplay)
{ let j = firstPos;
for (let i = 0;i<queuedItems;i++)
{produceMessage(messageStack[j]);
if (++j > produceNrSnapshot) j=0;
}
handleOneMessage(message,forceDisplay)
queuedItems=0;
}
else
forceDisplay = false;
}
if (!forceDisplay)
{ handleOneMessage(message,forceDisplay)
if (queuedItems==produceNrSnapshot)
{ if (++nextPos > produceNrSnapshot)
nextPos=0;
if (++firstPos > produceNrSnapshot)
firstPos=0;
}
else
{++queuedItems;
++nextPos;
}
messageStack[nextPos]= message;
}
}
catch (err) {console.log("error in metamessage",err)}
}
function produceMessage(message)
{try {
console.log('\x1b[4m', (new Date()).toLocaleString() + "\x1b[0m \x1b[36m\x1b[7m" + (message.deviceId ? message.deviceId : "no deviceId") + "\x1b[0m - " + message.component + "\x1b[0m: ", message.type.Color, (typeof message.content == 'object' ? "JSON Object":message.content), '\x1b[0m');
if (typeof message.content == 'object' || Array.isArray(message.content ))
metaMessageParamHandler(message.content)
if (message.params!=undefined)
metaMessageParamHandler(message.params)
return 1; // signal message is written
}
catch(err) {console.log("Err in producemessage",err)}
}
function handleOneMessage(message,Forced)
{try {
let CompIndex = myComponents.findIndex((Comp) => {return Comp.Name == message.component });
if (mySeverity ) {//&& myComponents) {
if ((CompIndex == -1 && mySeverity.includes(message.type)) ||(CompIndex != -1 && myComponents[CompIndex].LOG_LEVEL.includes(message.type) )) // Check module specific
produceMessage(message)
}
}
catch(err) {console.log("Err in metamessage",err)}
}
exports.getLoglevels = getLoglevels;
exports.OverrideLoglevel = OverrideLoglevel;
exports.metaMessage = metaMessage;
exports.LOG_TYPE = LOG_TYPE;
exports.LOG_LEVEL = LOG_LEVEL;
exports.initialiseLogSeverity = initialiseLogSeverity;
exports.initialiseLogComponents = initialiseLogComponents;