support `/api/last` with no date

README.md

@@ -40,7 +40,7 @@ To read a database, make a GET request as follows:
 `GET /api/last`
 * token - (required) the read token for the database
 * tz - (optional, default UTC) timezone string (e.g. America/Los_Angeles) which will be used to determine the absolute start/end times for the day
-* date - (optional) specify a full timestamp to return a single record before this date (the point returned will be no more than 24 hours before the given date)
+* date - (optional, default to now) specify a full timestamp to return a single record before this date (the point returned will be no more than 24 hours before the given date)
 * geocode - (optional) if "true", then the location found will be reverse geocoded using [Atlas](https://atlas.p3k.io) to find the city and timezone at the location
 
 

compass/app/Http/Controllers/Api.php

@@ -137,9 +137,10 @@ class Api extends BaseController
         return response(json_encode(['error' => 'invalid date provided']))->header('Content-Type', 'application/json');
       }
     } else {
-      return response(json_encode(['error' => 'no date provided']))->header('Content-Type', 'application/json');
+      $date = new DateTime();
     }
 
+    /* ********************************************** */
     // TODO: move this logic into QuartzDB
 
     // Load the shard for the given date
@@ -164,6 +165,13 @@ class Api extends BaseController
         break;
       $record = $r;
     }
+    /* ********************************************** */
+
+    if(!$record) {
+      return response(json_encode([
+        'data'=>null
+      ]));
+    }
 
     $response = [
       'data' => $record->data