Snek/api.js

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const DB=require('better-sqlite3');
const {Router}=require('express');
const db=new DB('db.sqlite');
const api=new Router();
const leaderboardSelect='SELECT username, score, length, time, speed FROM leaderboards';
const getLeaderboardsBy={
score: db.prepare(`${leaderboardSelect} WHERE mode=? ORDER BY score DESC LIMIT ? OFFSET ?`),
timeA: db.prepare(`${leaderboardSelect} WHERE mode=? ORDER BY time ASC LIMIT ? OFFSET ?`),
timeD: db.prepare(`${leaderboardSelect} WHERE mode=? ORDER BY time DESC LIMIT ? OFFSET ?`)
};
const addLeaderboard=db.prepare(`
INSERT
INTO leaderboards(mode, username, score, length, time, speed)
VALUES(@mode, @username, @score, @length, @time, @speed)
`);
const levelList=require('./assets/levelList.json');
const validMode=mode => {
try {
const [category, name]=mode.split('/');
return levelList[category].levels.map(l => ''+l).includes(name);
} catch(e) {
return false;
}
};
api.get('/leaderboards/:category/:id', (req, res) => {
const sort=req.query.sort || 'score';
if(!['score', 'timeA', 'timeD'].includes(sort)) return res.status(400).json({
ok: false,
err: 'Invalid sort'
});
const results=+req.query.results || 20;
if((typeof results)!='number' || results<1 || results >100) return res.status(400).json({
ok: false,
err: 'Invalid result count'
});
const page=+req.query.page || 1;
if((typeof page)!='number' || page<1) return res.status(400).json({
ok: false,
err: 'Invalid page'
});
const data=getLeaderboardsBy[sort]
.all(req.params.category+'/'+req.params.id, results, (page-1)*results);
return res.status(200).json({
ok: true,
data
});
});
api.post('/leaderboards/:category/:id', (req, res) => {
const mode=req.params.category+'/'+req.params.id;
if((typeof mode)!='string' || !validMode(mode)) return res.status(400).json({
ok: false,
err: 'Invalid mode'
});
const username=req.body.username;
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if((typeof username)!='string' || username.length>100) return res.status(400).json({
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ok: false,
err: 'Invalid username'
});
const score=req.body.score;
if((typeof score)!='number' || score%1 || score<0) return res.status(400).json({
ok: false,
err: 'Invalid score'
});
const length=req.body.length;
if((typeof length)!='number' || length%1 || length<1) return res.status(400).json({
ok: false,
err: 'Invalid length'
});
const time=req.body.time;
if((typeof time)!='number' || time%1 || time<0) return res.status(400).json({
ok: false,
err: 'Invalid time'
});
const speed=req.body.speed;
if((typeof speed)!='number' || speed%1 || speed<0) return res.status(400).json({
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ok: false,
err: 'Invalid speed'
});
try {
addLeaderboard.run({
mode, username,
score, length,
time, speed
});
res.json({
ok: true
});
} catch(e) {
res.status(500).json({
ok: false,
err: 'Failed to add score'
});
}
});
return module.exports=exports=api;