Add additional formats for sequence list endpoint.

The original and default "Accept: application/json" will return
a sequence summary.

"Accept: application/geo+json" will return a GeoJSON of the
entire project.

"Accept: application/vnd.aaltronav.dougal+octet-stream" will
return the entire project in Dougal's binary format.

lib/www/server/api/middleware/sequence/list/binary.js

@@ -0,0 +1,17 @@
+const { bundle } = require('../../../../lib/binary');
+const { sequence } = require('../../../../lib/db');
+
+module.exports = async function (req, res, next) {
+
+	try {
+		const json = await sequence.get(req.params.project, null, req.query);
+		const data = bundle(json, {type: req.query.type});
+		console.log("bundle", data);
+
+		res.status(200).send(Buffer.from(data));
+		next();
+	} catch (err) {
+		next(err);
+	}
+
+};

lib/www/server/api/middleware/sequence/list/geojson.js

@@ -0,0 +1,33 @@
+const { ERROR, INFO, DEBUG } = require('DOUGAL_ROOT/debug')(__filename);
+
+const { sequence } = require('../../../../lib/db');
+
+module.exports = async function (req, res, next) {
+
+	try {
+		const ts0 = Date.now();
+		const json = await sequence.get(req.params.project, null, req.query);
+		const geometry = req.query.geometry || "geometrypreplot";
+		const δt = Date.now()-ts0;
+		DEBUG("Full-project data retrieval completed in %.3f s", δt / 1000);
+
+
+		const geojson = {
+			type: "FeatureCollection",
+			features: json.map(feature => {
+				return {
+					type: "Feature",
+					geometry: feature[geometry],
+					properties: {...feature}
+				}
+			})
+		};
+
+		res.status(200).send(geojson);
+		next();
+	} catch (err) {
+		next(err);
+	}
+
+
+};

lib/www/server/api/middleware/sequence/list/index.js

@@ -0,0 +1,25 @@
+const json = require('./json');
+const geojson = require('./geojson');
+const binary = require('./binary');
+
+module.exports = async function (req, res, next) {
+	try {
+		const handlers = {
+			"application/json": json,
+			"application/geo+json": geojson,
+			"application/vnd.aaltronav.dougal+octet-stream": binary
+		};
+
+		const mimetype = (handlers[req.query.mime] && req.query.mime) || req.accepts(Object.keys(handlers));
+
+		if (mimetype) {
+			res.set("Content-Type", mimetype);
+			await handlers[mimetype](req, res, next);
+		} else {
+			res.status(406).send();
+			next();
+		}
+	} catch (err) {
+		next(err);
+	}
+}

lib/www/server/api/middleware/sequence/list/json.js

@@ -1,9 +1,10 @@
 
-const { sequence } = require('../../../lib/db');
+const { sequence } = require('../../../../lib/db');
 
 module.exports = async function (req, res, next) {
 
 	try {
+		console.log("JSON");
 		res.status(200).send(await sequence.list(req.params.project, req.query));
 		next();
 	} catch (err) {