Add map layer middleware and API endpoints

lib/www/server/api/index.js

@@ -123,6 +123,12 @@ app.map({
 	'/project/:project/gis/final/:featuretype(line|point)': {
 		get: [ mw.gis.project.final ]
 	},
+	'/project/:project/gis/layer': {
+		get: [ mw.etag.noSave, mw.gis.project.layer.list ]
+	},
+	'/project/:project/gis/layer/:name': {
+		get: [ mw.etag.noSave, mw.gis.project.layer.get ]
+	},
 
 	/*
 	 * Line endpoints

lib/www/server/api/middleware/gis/project/index.js

@@ -2,5 +2,6 @@ module.exports = {
 	bbox: require('./bbox'),
 	preplot: require('./preplot'),
 	raw: require('./raw'),
-	final: require('./final')
+	final: require('./final'),
+	layer: require('./layer')
 };

lib/www/server/api/middleware/gis/project/layer/get.js

@@ -0,0 +1,14 @@
+
+const { gis } = require('../../../../../lib/db');
+
+module.exports = async function (req, res, next) {
+
+	try {
+		res.set("Cache-Control", "public, max-age=21600");
+		res.status(200).send(await gis.project.layer.get(req.params.project, req.params.name));
+		next();
+	} catch (err) {
+		next(err);
+	}
+
+};

lib/www/server/api/middleware/gis/project/layer/index.js

@@ -0,0 +1,4 @@
+module.exports = {
+	list: require('./list'),
+	get: require('./get')
+};

lib/www/server/api/middleware/gis/project/layer/list.js

@@ -0,0 +1,14 @@
+
+const { gis } = require('../../../../../lib/db');
+
+module.exports = async function (req, res, next) {
+
+	try {
+		res.set("Cache-Control", "public, max-age=180");
+		res.status(200).send(await gis.project.layer.list(req.params.project));
+		next();
+	} catch (err) {
+		next(err);
+	}
+
+};