add comments

src/NetrunnerDb.Net/Repository.cs

@@ -1,8 +1,6 @@
 using System;
 using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+using System.Net;
 using Newtonsoft.Json;
 using RestSharp;
 
@@ -10,16 +8,50 @@ namespace NetrunnerDb.Net
 {
     public class Repository
     {
-        public IList<TResult> GetRequest<TResult>(string param)
+        /// <summary>
+        /// Make a get request. Parameter may be optional, look at netrunner db docs for info
+        /// </summary>
+        /// <typeparam name="TResult"></typeparam>
+        /// <param name="parameter">The URL parameter, not needed for classes that are plural like Sets</param>
+        /// <returns></returns>
+        /// <exception cref="ArgumentOutOfRangeException"></exception>
+        /// <exception cref="ArgumentNullException"></exception>
+        public IList<TResult> GetRequest<TResult>(string parameter = "")
             where TResult : class, IRequest, new()
         {
             var s = new TResult();
             var request = new RestRequest(){
-            Resource = s.EndPoint(param)};
+                Resource = s.EndPoint(parameter)
+            };
             var client = new RestClient("http://netrunnerdb.com");
             var response = client.Execute(request);
-
+            if (response.StatusCode != HttpStatusCode.OK) return null;
             return JsonConvert.DeserializeObject<IList<TResult>>(response.Content);
         }
+        /// <summary>
+        /// /api/sets/ returns data about all the sets in the database.
+        /// </summary>
+        /// <returns></returns>
+        public IList<Sets> GetSets()
+        {
+            return GetRequest<Sets>();
+        }
+        /// <summary>
+        /// /api/set/{code} returns card data about the cards in the set identified by code (core for Core Set, etc).
+        /// </summary>
+        /// <param name="code"></param>
+        /// <returns></returns>
+        public IList<Sets> GetSet(string code)
+        {
+            return GetRequest<Sets>(code);
+        }
+        /// <summary>
+        /// /api/cards/ returns data about all the cards in the database.
+        /// </summary>
+        /// <returns></returns>
+        public IList<Cards> GetCards()
+        {
+            return GetRequest<Cards>();
+        }
     }
 }

src/NetrunnerDb.Net/Responses/Cards.cs

@@ -117,6 +117,11 @@ namespace NetrunnerDb.Net
 
         public string EndPoint(string parameter = "")
         {
+            //this endpoint should not be passed a parameter
+            if (!string.IsNullOrWhiteSpace(parameter))
+            {
+                throw new ArgumentOutOfRangeException("parameter", "Cards does not have any parameters for the endpoint");
+            }
             return "/api/cards/";
         }
     }

src/NetrunnerDb.Net/Responses/Set.cs

@@ -108,6 +108,11 @@ namespace NetrunnerDb.Net
 
         public string EndPoint(string parameter = "")
         {
+            //we should be passed an actual param
+            if (string.IsNullOrWhiteSpace(parameter))
+            {
+                throw new ArgumentNullException("parameter");
+            }
             return string.Format("/api/set/{0}", parameter);
         }
     }

src/NetrunnerDb.Net/Responses/Sets.cs

@@ -36,6 +36,10 @@ namespace NetrunnerDb.Net
 
         public string EndPoint(string parameter = "")
         {
+            if (!string.IsNullOrWhiteSpace(parameter))
+            {
+                throw new ArgumentOutOfRangeException("parameter", "Sets does not have a URL parameter");
+            }
             return "/api/sets/";
         }
     }