Added ability to query for herbicide agents.

FarmmapsHerbicide/HerbicideApplication.cs

@@ -30,25 +30,6 @@ namespace FarmmapsHerbicide
             _farmmapsApiService = farmmapsApiService;
             _generalService = generalService;
             _herbicideService = herbicideService;
-
-            _liberatorTarweAgent = new HerbicideAgent()
-            {
-                Name = "Liberator",
-                SoilType = "Klei",
-                ExtraInputType = "OrganicMatter",
-                ActiveSubstanceContent = "diflu100+flufenacet400",
-                MinDosis = 0.33f,
-                MaxDosis = 0.6f,
-                A = 0.007f,
-                B = 0.25f,
-                C = 1.05f,
-                D = 97f,
-                E = 3f,
-                P = 1f,
-                Crop = "Tarwe",
-                Description = "Org. stof arme grond",
-                TankMix = string.Empty
-            };
         }
 
         public async Task RunAsync()
@@ -59,6 +40,9 @@ namespace FarmmapsHerbicide
             // !! this call is needed the first time an api is called with a fresh clientid and secret !!
             await _farmmapsApiService.GetCurrentUserCodeAsync();
             var roots = await _farmmapsApiService.GetCurrentUserRootsAsync();
+
+            var agents = await _herbicideService.GetHerbicideAgents();
+            _liberatorTarweAgent = agents.SingleOrDefault(a => a.Name.Equals("Liberator"));
             
             await SingleLutumTiffFlow(roots);
             await MultiVanDenBorneShapeFlow(roots);

FarmmapsHerbicide/HerbicideService.cs

@@ -1,4 +1,6 @@
 using System;
+using System.Collections.Generic;
+using System.Linq;
 using System.Threading.Tasks;
 using FarmmapsApi.Models;
 using FarmmapsApi.Services;
@@ -24,6 +26,18 @@ namespace FarmmapsHerbicide
             _generalService = generalService;
         }
 
+        public async Task<List<HerbicideAgent>> GetHerbicideAgents()
+        {
+            var itemType = "vnd.farmmaps.package.vra.herbicide";
+            var vraHerbicideDataItems = await _farmmapsApiService.GetItemsAsync(string.Empty, itemType);
+
+            var item = vraHerbicideDataItems.FirstOrDefault();
+            if (item == null)
+                return null;
+
+            return item.Data.ContainsKey("agents") ? item.Data["agents"].ToObject<List<HerbicideAgent>>() : null;
+        }
+
         public async Task<Item> CalculateApplicationMapAsync(Item cropfieldItem, HerbicideAgent agent, params Item[] inputItem)
         {
             if (inputItem.Length == 0)