Parse JSON file

2015-12-17 00:22:28 +01:00
parent c95644ba5d
commit cdc24f87a2
1 changed files with 126 additions and 0 deletions
@@ -0,0 +1,126 @@
+using NavCityBreda.Model;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using Newtonsoft.Json.Linq;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace NavCityBreda.Helpers
+{
+    class JSONParser
+    {
+        public static Route LoadRoute(string file)
+        {
+            if (!File.Exists(file))
+                throw new FileNotFoundException("The file does not exist: " + file);
+
+            string json = File.ReadAllText(file);
+            JObject o = JObject.Parse(json);
+
+            string error;
+            if (!ValidateRouteObject(o, out error))
+                throw new FileLoadException("Invalid Route information in " + file + ", " + error);
+
+            Route r = new Route((string)o["name"], (string)o["description"], (string)o["landmarks"], Int32.Parse((string)o["minutes"]));
+
+            JToken[] waypoints = o["waypoints"].ToArray();
+            foreach(JToken t in waypoints)
+            {
+                if(!ValidateWaypointObject(t, out error))
+                    throw new FileLoadException("Invalid Waypoint information in " + file + ", " + error);
+
+                Waypoint w;
+
+                if ((bool)t["landmark"])
+                    w = new Landmark((double)t["latitude"], (double)t["longitude"], (string)t["name"], (string)o["description"], t["image"].NullOrEmpty() ? "" : (string)t["image"]);
+                else
+                    w = new Waypoint((double)t["latitude"], (double)t["longitude"], (string)t["name"]);
+
+                r.Add(w);
+            }
+
+            return r;
+        }
+
+        private static bool ValidateRouteObject(JObject o, out string error)
+        {
+            bool valid = true;
+            error = "Success";
+
+            if (o["name"].NullOrEmpty())
+            {
+                valid = false;
+                error = "Name missing";
+            }
+
+            if (o["description"].NullOrEmpty())
+            {
+                valid = false;
+                error = "Description missing";
+            }
+
+            if (o["landmarks"].NullOrEmpty())
+            {
+                valid = false;
+                error = "Landmarks missing";
+            }
+
+            if (o["minutes"].NullOrEmpty())
+            {
+                valid = false;
+                error = "Minutes missing";
+            }
+
+            if (o["waypoints"].NullOrEmpty())
+            {
+                valid = false;
+                error = "Waypoints missing or empty";
+            }
+
+            return valid;
+        }
+
+        private static bool ValidateWaypointObject(JToken o, out string error)
+        {
+            bool valid = true;
+            error = "Success";
+
+            if (o["name"].NullOrEmpty())
+            {
+                valid = false;
+                error = "Name missing";
+            }
+
+            if (o["landmark"].NullOrEmpty())
+            {
+                valid = false;
+                error = "Landmark missing";
+            }
+
+            if (o["latitude"].NullOrEmpty())
+            {
+                valid = false;
+                error = "Latitude missing";
+            }
+
+            if (o["longitude"].NullOrEmpty())
+            {
+                valid = false;
+                error = "Longitude missing";
+            }
+
+            if( valid && (bool)o["landmark"])
+            {
+                if (o["description"].NullOrEmpty())
+                {
+                    valid = false;
+                    error = "Description missing";
+                }
+            }
+
+            return valid;
+        }
+    }
+}