Add local weather caching mechanism

server.js

@@ -1,12 +1,23 @@
-var express = require( "express" ),
-    weather = require( "./routes/weather.js" ),
-	port    = process.env.PORT || 3000;
-	app		= express();
+var express		= require( "express" ),
+    weather		= require( "./routes/weather.js" ),
+    mongoose	= require( "mongoose" ),
+    Cache		= require( "./models/Cache" ),
+    CronJob		= require( "cron" ).CronJob,
+	port		= process.env.PORT || 3000;
+	app			= express();
 
 if ( !process.env.PORT ) {
 	require( "dotenv" ).load();
 }
 
+// Connect to local MongoDB instance
+mongoose.connect( "localhost" );
+
+// If the database connection cannot be established, throw an error
+mongoose.connection.on( "error", function() {
+  console.error( "MongoDB Connection Error. Please make sure that MongoDB is running." );
+} );
+
 // Handle requests matching /weatherID.py where ID corresponds to the
 // weather adjustment method selector.
 // This endpoint is considered deprecated and supported for prior firmware
@@ -23,3 +34,29 @@ var server = app.listen( port, "127.0.0.1", function() {
 
   console.log( "OpenSprinkler Weather Service now listening on port %s", port );
 } );
+
+// Schedule a cronjob daily to consildate the weather cache data, runs daily
+new CronJob( "0 * * * * *", function() {
+
+	// Find all records in the weather cache
+	Cache.find( {}, function( err, records ) {
+
+		// Cycle through each record
+		records.forEach( function( record ){
+
+			// If the record contains any unaveraged data, then process the record
+			if ( record.currentHumidityCount > 0 ) {
+
+				// Average the humidity by dividing the total over the total data points collected
+				record.yesterdayHumidity = record.currentHumidityTotal / record.currentHumidityCount;
+
+				// Reset the current humidity data for the new day
+				record.currentHumidityTotal = 0;
+				record.currentHumidityCount = 0;
+
+				// Save the record in the database
+				record.save();
+			}
+		} );
+	} );
+}, null, true, "UTC" );