log_fixer.js

var fs = require('fs');

var filename = process.argv[2];

console.log('Fixing ' + filename);

var lines = fs.readFileSync(filename).toString().split('\n');

var output = [];
lines.forEach((s, idx) => {
	var regex = /^\[(.+?)\](.+)$/;
	var match = regex.exec(s);
	if(match) {
		var date = new Date(match[1].endsWith('GMT') ? match[1] : match[1] + ' GMT');
		output.push({date: date, text: match[2]});
	}
});

if(output.length > 0) {
    var last_date = output[0].date;
    output = output.filter((line, idx) => {
        if(line.date >= last_date && (idx == 0 || line.text != output[idx - 1].text)) {
            last_date = line.date;
            return true;
        }

        return false;
    }).map(line => '[' + line.date.toUTCString() + ']' + line.text);
}

fs.writeFile(filename, output.join('\n') + '\n');