create endpoint for node lookup by ID

backend/app/get_node.py

@@ -0,0 +1,31 @@
+import json
+from app.db import getConnection
+
+sql = '''
+SELECT 
+    cg_nodes.node_id::int,
+    ST_AsGeoJSON(cg_nodes.geom) AS geom,
+    array_agg(DISTINCT InitCap(streets.st_name)) FILTER (WHERE streets.st_name IS NOT NULL) AS street_names
+FROM congestion.network_nodes AS cg_nodes
+JOIN here.routing_nodes_21_1 AS here_nodes USING (node_id)
+JOIN here_gis.streets_att_21_1 AS streets USING (link_id)
+WHERE node_id = %(node_id)s
+GROUP BY
+    cg_nodes.node_id,
+    cg_nodes.geom;
+'''
+
+# TODO code could use some tidying up
+def get_node(node_id):
+    with getConnection() as connection:
+        with connection.cursor() as cursor:
+            cursor.execute(sql, {"node_id": node_id})
+            nodes = []
+            for node_id, geojson, street_names in cursor.fetchall():
+                nodes.append( {
+                    'node_id': node_id,
+                    'street_names': street_names,
+                    'geometry': json.loads(geojson)
+                } )
+    connection.close()
+    return nodes[0] if len(nodes) > 0 else {}

backend/app/routes.py

@@ -4,6 +4,7 @@
 from app import app
 from app.db import getConnection
 from app.get_closest_nodes import get_closest_nodes
+from app.get_node import get_node
 from app.get_travel_time import get_travel_time
 
 from app.get_links import get_links
@@ -25,6 +26,14 @@ def closest_node(longitude,latitude):
         return jsonify({'error': "Longitude and latitude must be decimal numbers!"})
     return jsonify(get_closest_nodes(longitude,latitude))
 
+# test URL /node/30357505
+@app.route('/node/<node_id>', methods=['GET'])
+def node(node_id):
+    try:
+        node_id = int(node_id)
+    except:
+        return jsonify({'error': "node_id should be an integer"})
+    return jsonify(get_node(node_id))
 
 # test URL /link-nodes/30421154/30421153
 #shell function - outputs json for use on frontend

frontend/src/Sidebar/restoreStateFromFile.js

@@ -48,10 +48,9 @@ export async function restoreStateFromFile(fileDropEvent,stateData){
             }
             // days of week
             // TODO: drop the default selection?
-            [... new Set(URIs.map(uri=>uri.dow))].forEach( dows => {
+            [... new Set(URIs.map(uri=>uri.dow))].forEach( dowsString => {
                 let daysFactor = stateData.createDays()
-                let days = dows.split('').map(Number)
-                daysFactor.setFromSet(new Set(days))
+                daysFactor.setFromSet(new Set(dowsString.split('').map(Number)))
             } )
         } )
 }