Nodejs Anope Database Merger

//This requires Node.js to run. Please put this in a file and run "node filename"
//It was created to merge old backups of anope.db-date files located in the same directory as this script.
//It will go from the last back up to the earliest.

'use strict'

//BACKUP ALL CURRENT DATABASE FILES BEFORE REPLACING WITH THE OUTPUT OF THIS SCRIPT!
//Made by Colten Covington / Colten45
//You may contact me via colten.covington@gmail.com or colten at tmro.tv if you need help
//or come to any chat related to TMRO.tv and I am usually around those.

//Set each type to false or true depending on what you want to merge.
//All set to true with seeninfoMergeALL set to false is a full merge.
let types = {
    'BotInfo': true,
    'Stats': true,
    'NickCore': true,
    'NickAlias': true,
    'ChannelInfo': true,
    'ChanAccess': true,
    'ModeLock': true,
    'SeenInfo': true,
    'AJoinEntry': true,
    'NSMiscData': true,
    'Exception': true
}
//seeninfoMergeALL set to false will only merge seeninfo of users who are registered and on the very first db file.
//seeninfoMergeALL set to true will merge all seeninfo WARNING this can be quite big if done on a large set of database backups.
let seeninfoMergeALL = false;


//Only known thing to me currently is stats are duplicated due to below code using the last param of the first DATA line for an OBJECT

//I had one bug in an old db that was a NSMiscDataUSERNAME OBJECT So the types object above is checked to make sure corrupted data is not brought over.

const path = require('path');
const fs = require('fs');
const directoryPath = path.join(__dirname);
let objects = [];
let objectnames = {};
let objectnamescaseins = {};
let dontadd = [];
let nickcore = '';
let i = 0;
let stats = true;
fs.readdir(directoryPath, function (err, files) {
    if (err) {
        return console.log('Unable to scan directory: ' + err);
    }
    files = files.reverse()
    files.forEach(function (file) {
        if (file.indexOf('anope') == 0) {
            i++;
            var contents = fs.readFileSync(file, 'utf8');
            let blam = contents.trim().split('END').slice(0,-1);
            blam.forEach(function (object) {
                objects.push(object);
                object = object.trim().split('\n').splice(0,object.trim().split('\n').length);
                let data = object.splice(1);
                if (data.length != 0 && types[object[0].split(' ')[1]]) {
                    if (object[0].split(' ')[1] == 'Stats' && stats) {
                        if (!objectnames[object[0].split(' ')[1]]) {
                            objectnames[object[0].split(' ')[1]] = {objectCount:0};
                            objectnamescaseins[object[0].split(' ')[1]] = {objectCount:0};
                        }
                        if (!objectnamescaseins[object[0].split(' ')[1]][(['ChanAccess','ModeLock'].indexOf(object[0].split(' ')[1]) != -1) ? data[2].split(' ')[data[2].split(' ').length - 1].toLowerCase() : data[0].split(' ')[data[0].split(' ').length - 1].toLowerCase()] && dontadd.indexOf(data[0].split(' ')[data[0].split(' ').length - 1]) == -1) {
                            objectnames[object[0].split(' ')[1]][(['ChanAccess','ModeLock'].indexOf(object[0].split(' ')[1]) != -1) ? data[2].split(' ')[data[2].split(' ').length - 1] : data[0].split(' ')[data[0].split(' ').length - 1]] = {firstFile:i};
                            objectnamescaseins[object[0].split(' ')[1]][(['ChanAccess','ModeLock'].indexOf(object[0].split(' ')[1]) != -1) ? data[2].split(' ')[data[2].split(' ').length - 1].toLowerCase() : data[0].split(' ')[data[0].split(' ').length - 1].toLowerCase()] = {};
                            data.forEach(function (d) {
                                let type = objectnames[object[0].split(' ')[1]][(['ChanAccess','ModeLock'].indexOf(object[0].split(' ')[1]) != -1) ? data[2].split(' ')[data[2].split(' ').length - 1] : data[0].split(' ')[data[0].split(' ').length - 1]];
                                type[d.split(' ')[1]] = d.split(' ').slice(2)[0] == '' ? d.split(' ').slice(2).join(' '): d.split(' ').slice(2).join(' ');
                            })
                        }
                        objectnames[object[0].split(' ')[1]].objectCount++;
                        stats = false;
                    }
                    else if (object[0].split(' ')[1] != 'Stats') {
                        if (!objectnames[object[0].split(' ')[1]]) {
                            objectnames[object[0].split(' ')[1]] = {objectCount:0};
                            objectnamescaseins[object[0].split(' ')[1]] = {objectCount:0};
                        }
                        if (!objectnamescaseins[object[0].split(' ')[1]][(['ChanAccess','ModeLock'].indexOf(object[0].split(' ')[1]) != -1) ? data[2].split(' ')[data[2].split(' ').length - 1].toLowerCase() : data[0].split(' ')[data[0].split(' ').length - 1].toLowerCase()] && dontadd.indexOf(data[0].split(' ')[data[0].split(' ').length - 1]) == -1) {
                            objectnames[object[0].split(' ')[1]][(['ChanAccess','ModeLock'].indexOf(object[0].split(' ')[1]) != -1) ? data[2].split(' ')[data[2].split(' ').length - 1] : data[0].split(' ')[data[0].split(' ').length - 1]] = {firstFile:i};
                            objectnamescaseins[object[0].split(' ')[1]][(['ChanAccess','ModeLock'].indexOf(object[0].split(' ')[1]) != -1) ? data[2].split(' ')[data[2].split(' ').length - 1].toLowerCase() : data[0].split(' ')[data[0].split(' ').length - 1].toLowerCase()] = {};
                            data.forEach(function (d) {
                                let type = objectnames[object[0].split(' ')[1]][(['ChanAccess','ModeLock'].indexOf(object[0].split(' ')[1]) != -1) ? data[2].split(' ')[data[2].split(' ').length - 1] : data[0].split(' ')[data[0].split(' ').length - 1]];
                                type[d.split(' ')[1]] = d.split(' ').slice(2)[0] == '' ? d.split(' ').slice(2).join(' '): d.split(' ').slice(2).join(' ');
                            })
                        }
                        objectnames[object[0].split(' ')[1]].objectCount++;
                    }
                }
            })
        }
    });

    for (var objectType in objectnames) {
        if (types[objectType]) {
            for (var property in objectnames[objectType]) {
                if (objectnames[objectType].hasOwnProperty(property) && property != "objectCount") {
                    if (!seeninfoMergeALL && objectType == 'SeenInfo') {
                        if (objectnames.NickCore[property] || objectnames[objectType][property].firstFile == 1) {
                            nickcore += 'OBJECT ' + objectType + '\u000a';
                            let datatype = '';
                            for (var type in objectnames[objectType][property]) {
                                if (objectnames[objectType].hasOwnProperty(property) && type != "firstFile") {
                                    datatype += 'DATA ' + type + ' ' + objectnames[objectType][property][type] + '\u000a';
                                }
                            }
                            nickcore += datatype;
                            nickcore += 'END\u000a';
                        }
                    }
                    else {
                        nickcore += 'OBJECT ' + objectType + '\u000a';
                        let datatype = '';
                        for (var type in objectnames[objectType][property]) {
                            if (objectnames[objectType].hasOwnProperty(property) && type != "firstFile") {
                                datatype += 'DATA ' + type + ' ' + objectnames[objectType][property][type] + '\u000a';
                            }
                        }
                        nickcore += datatype;
                        nickcore += 'END\u000a';
                    }
                }
            }
        }
    }
    fs.writeFileSync('new.db', nickcore);
    console.log('Done')
});