refactor logic into another habitica service and modified license

Habitica.Todoist.Integration.Services/Extensions.cs

@@ -0,0 +1,43 @@
+using Habitica.Todoist.Integration.Model.Habitica;
+using Habitica.Todoist.Integration.Model.Habitica.Enums;
+using Habitica.Todoist.Integration.Model.Todoist;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Habitica.Todoist.Integration.Services.Extensions
+{
+    public static class Extensions
+    {
+        public static Task ToHabiticaTask(this Item item, string habiticaId = null)
+        {
+            var taskTypeStr = Enum.GetName(typeof(TaskType), TaskType.Todo).ToLower();
+            var task = new Task
+            {
+                Id = habiticaId,
+                Text = item.Content,
+                Type = taskTypeStr,
+                Date = item.Due?.ToJavaScriptDateStr(),
+                Priority = GetHabiticaDifficulty(item.Priority)
+            };
+
+            return task;
+        }
+
+        private static string GetHabiticaDifficulty(int todoistPriority)
+        {
+            switch (todoistPriority)
+            {
+                case 1:
+                    return "0.1";
+                case 2:
+                    return "1";
+                case 3:
+                    return "1.5";
+                case 4:
+                    return "2";
+            }
+            return null;
+        }
+    }
+}