apply label

ttrss/ApiClient.cs

@@ -66,6 +66,7 @@ namespace ttrss_co_client.ttrss
             //???? = 7
             //???? = 8
             //1.14 = 9
+            //1.15 = 10
             assertInitialized();
             return await getOneValue<int>("getApiLevel", "level");
         }
@@ -580,7 +581,7 @@ namespace ttrss_co_client.ttrss
 
             return apiResponse.ContainsKey("status") && apiResponse["status"]?.ToLower() == "ok";
         }
-        public async Task<IEnumerable<Label>> GetLabels(int? article_id)
+        public async Task<IEnumerable<Label>> GetLabels(int? article_id = null)
         {
             assertInitialized();
 
@@ -600,11 +601,49 @@ namespace ttrss_co_client.ttrss
             }
             return labels;
         }
-        public async Task SetArticleLabel(int label_id, bool assign, params int[] article_ids)
+        public async Task<int> SetArticleLabel(int label_id, bool assign, params int[] article_ids)
         {
-            //there's a label "cache", i guess?
+            if (article_ids == null || article_ids.Length == 0)
+            {
+                throw new System.ArgumentNullException("ids", "need to specify at least one id");
+            }
             assertInitialized();
-            throw new NotImplementedException();
+
+            var json = JsonContent.Create(new
+            {
+                op = "setArticleLabel",
+                sid = this.SessionId,
+                article_ids = string.Join(',', article_ids),
+                label_id = label_id,
+                assign = assign
+            });
+
+            var apiResponse = await get<Dictionary<string, string>>(json);
+
+            if (!apiResponse.ContainsKey("status") && apiResponse["status"]?.ToLower() == "ok")
+            {
+                return 0;
+            }
+
+            if (this.api_level <= 10)
+            {
+                //update label cache
+                var tasks = new List<Task>();
+                foreach (var id in article_ids)
+                {
+                    tasks.Add(GetLabels(id));
+                }
+                Task.WaitAll(tasks.ToArray());
+            }
+            int toReturn;
+            if (int.TryParse(apiResponse["updated"], out toReturn))
+            {
+                return toReturn;
+            }
+            else
+            {
+                throw new Exception("update ostensibly ok, but couldn't parse");
+            }
         }
         public async Task ShareToPublished(string title, Uri url, string content, bool sanitize = true)
         {