fix post counts in topic hash if they are out of sync

post_count.js

'use strict';
/*globals require, console, process */

var nconf = require('nconf');
var async = require('async');

nconf.file({
	file: 'config.json'
});

var db = require('./src/database');

db.init(function(err) {
	if (err) {
		console.log('NodeBB could not connect to your database. Returned following error: ' + err.message);
		process.exit();
	}

	fixPostCounts(function(err) {
		if (err) {
			console.log(err.message);
			process.exit();
		}

		console.log('post counts fixed');
		process.exit();
	});
});

function fixPostCounts(callback) {
	db.getSortedSetRange('topics:tid', 0, -1, function(err, tids) {
		if (err) {
			return callback(err);
		}

		async.eachSeries(tids, fixTopic, callback);
	});
}

function fixTopic(tid, callback) {
	async.parallel({
		realCount: function(next) {
			db.sortedSetCard('tid:' + tid + ':posts', next);
		},
		postCount: function(next) {
			db.getObjectField('topic:' + tid, 'postcount', next);
		}
	}, function(err, results) {
		if (err) {
			return callback(err);
		}
		var realCount = results.realCount + 1;
		if (realCount === parseInt(results.postCount, 10)) {
			return callback();
		}
		console.log('fixing topic: ' + tid + ', postcount = ' + results.postCount + ', realcount = ' + realCount);
		db.setObjectField('topic:' + tid, 'postcount', realCount, callback);
	});
}