cumstorm/src/getGJLevels.ts

import * as hash from './hash';

const levelsPerPage = 10; // should be kept at 10, increasing/decreasing may lead to unforseeable consequences
const handleRequestsAt = ['getGJLevels21', 'getGJLevels20', 'getGJLevels19', 'getGJLevels'];

module.exports = (app) : void => {
	let getLevels = async (req, res) => {
		let levelsString = '';

		let searchQuery: any = {}; // fuck you typescript, i have to use any or else it screams

		console.log(req.body);

		if (isNaN(Number(req.body.str)) || req.body.str == '') searchQuery.unlisted = false;

		if (req.body.featured != '0') searchQuery.featured = true;
		if (req.body.epic != '0') searchQuery.epic = true;
		if (req.body.coins != '0') searchQuery.coins = true;
		if (req.body.twoPlayer != '0') searchQuery.twoPlayer = true;
		if (req.body.star) searchQuery.stars = { $gt: 0 };
		if (req.body.original != '0') searchQuery.original = 0;
		if (req.body.noStar) searchQuery.stars = 0;

		if (req.body.song) {
			if (Number(req.body.song) <= 50) { // lets assume a limit of 50 official songs
				searchQuery.audioTrack = Number(req.body.song); // official song
			} else {
				searchQuery.songID = Number(req.body.song); // newgrounds/custom songs
			}
		}

		if (req.body.diff != '-') {
			// if the client requests -1, -2 or -3 then it cant request any other difficulties
			searchQuery.auto = false;
			if (req.body.diff == '-1') { // NA levels
				searchQuery.difficulty = 0;
			} else if (req.body.diff == '-2') { // demons
				if (req.body.demonFilter) {
					searchQuery.difficulty = 60 + req.body.demonFilter * 10;
				} else {
					searchQuery.difficulty = { $gte: 60 };
				}
			} else if (req.body.diff == '-3') { // auto
				searchQuery.auto = true;
			} else {
				searchQuery.$or = req.body.diff
					.split(',') // multiple diffs
					.map(d => {
						return { difficulty: Number(d) * 10 };
					});
			}
		}

		const levels = await app.get('db').collection('levels').find(
			{
				$and: [
					{
						$or: [
							{ id: Number(req.body.str) },
							{ name: { $regex: `${req.body.str}` } }
						]
					},
					searchQuery
				]
			})
			.toArray();

		switch (Number(req.body.type)) {
		case 1: // most downloaded
			levels.sort((a, b) => b.downloads - a.downloads);
			break;
		case 2: // most liked
			levels.sort((a, b) => b.likes - a.likes);
			break;
		case 3: // trending
			levels.filter(l => {
				l.timestamp || 0 > Date.now() - 604800000;
			});
			levels.sort((a, b) => b.downloads - a.downloads);
			break;
		case 4: // recent
			levels.sort((a, b) => b.timestamp || 0 - a.timestamp || 0);
			break;
		case 6: // featured
			levels.filter(l => l.featured);
			levels.sort((a, b) => b.timestamp || 0 - a.timestamp || 0);
			break;
		case 7: // ~ M a G i C ~
			levels.filter(l => {
				l.objects || 0 > 1000;
			});
			levels.sort((a, b) => b.timestamp || 0 - a.timestamp || 0);
			break;
		case 11: // awarded
			levels.filter(l => {
				l.stars > 0;
			});
			levels.sort((a, b) => b.timestamp || 0 - a.timestamp || 0);
			break;
		case 12: // TODO: followed
		case 13: // TODO: friends
			levels.filter(() => false);
			break;
		case 16: // epic
			levels.filter(l => l.epic);
			levels.sort((a, b) => b.timestamp || 0 - a.timestamp || 0);
		}

		let offset = Math.max(Number(req.body.page) * levelsPerPage - 1, 0);

		const foundLevels = levels
			.slice(offset, (Number(req.body.page) + 1) * levelsPerPage - 1);

		let results = foundLevels
			.map(l =>
				`1:${l.id}:2:${l.name}:5:${l.version}:6:${l.userID}:8:10:9:${l.difficulty}:10:${l.downloads}:12:${l.audioTrack}:13:${l.gameVersion}:14:${l.likes}:17:${Number(l.difficulty >= 60)}:43:${Math.max(l.difficulty - 60, 0)}:25:${Number(l.auto)}:18:${l.stars}:19:${Number(l.featured)}:42:${Number(l.epic)}:45:${l.objects}:3:${l.description}:15:${l.length}:30:${l.original}:31:0:37:${l.coins}:38:${Number(l.ratedCoins)}:39:${l.requestedStars}:46:1:47:2:40:${Number(l.hasLDM)}:35:${l.songID}`
			)
			.join('|');

		let users = new Array(10) // placeholder
			.fill('16:mat:0')
			.join('|');

		let songs = ''; // placeholder

		levelsString = [results, users, songs, levels.length].join('#') +
			`:${offset}:${levelsPerPage}#` +
			hash.hashLevels(foundLevels);

		res.status(200).send(levelsString);
	};

	for (let i in handleRequestsAt)
		app.post('/' + app.get('config').addtopath + 'database/' + handleRequestsAt[i] + '.php', getLevels);
};