Ajout dees points API #3 et #2

Signed-off-by: Avior <florian.bouillon@delta-wings.net>

pages/api/coins.js

@@ -3,7 +3,44 @@ import Coin from '../../models/Coin'
 
 export default async (req, res) => {
 	await connexion.sync()
-	res.statusCode = 200
 	res.setHeader('Content-Type', 'application/json')
-	res.end(JSON.stringify(await Coin.findAll()))
+	const distanceVal = toInt(req.query.distance)
+	const coordx = toFloat(req.query.coordx)
+	const coordy = toFloat(req.query.coordy)
+	const coins = await Coin.findAll()
+	if (distanceVal && coordx && coordy) {
+		const result = []
+		for (const coin of coins) {
+			const tmp = coin.toJSON()
+			console.log(tmp)
+			console.log(distance(tmp.coordx, tmp.coordy, coordx, coordy))
+			if ((distance(tmp.coordx, tmp.coordy, coordx, coordy) * 1000) <= distanceVal) {
+				result.push(tmp)
+			}
+		}
+		return res.status(200).end(JSON.stringify(result))
+	}
+
+	res.status(200).end(JSON.stringify(coins))
+}
+
+function toFloat(number) {
+	const res = parseFloat(number)
+	return !isNaN(res) ? res : undefined
+}
+
+function toInt(number) {
+	const res = parseInt(number)
+	return !isNaN(res) ? res : undefined
+}
+
+// return distance in km
+function distance(lat1, lon1, lat2, lon2) {
+	var p = 0.017453292519943295;
+	var c = Math.cos;
+	var a = 0.5 - c((lat2 - lat1) * p)/2 +
+			c(lat1 * p) * c(lat2 * p) *
+			(1 - c((lon2 - lon1) * p))/2;
+
+	return 12742 * Math.asin(Math.sqrt(a))
 }