const { event } = require('../../../../lib/db');

const geojson = async function (req, res, next) {
	try {
		const query = req.query;
		query.sequence = req.params.sequence;
		const events = await event.list(req.params.project, query);
		const response = {
			type: "FeatureCollection",
			features: events.filter(event => event.geometry).map(event => {
				const feature = {
					type: "Feature",
					geometry: event.geometry,
					properties: event
				};
				delete feature.properties.geometry;
				return feature;
			})
		};
		if ("download" in query || "d" in query) {
			const filename = `${req.params.project}-seq${query.sequence.padStart(3, "0")}.geojson`;
			res.set("Content-Disposition", `attachment; filename="${filename}"`);
		}
		res.status(200).send(response);
		next();
	} catch (err) {
		next(err);
	}
}

module.exports = geojson;