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