hey adam... y'all ever heard of a generic object?

Program.cs

@@ -1,4 +1,5 @@
 using Newtonsoft.Json;
+using System.Linq;
 
 namespace ttrss_co_client
 {
@@ -16,8 +17,17 @@ namespace ttrss_co_client
             var apiLevel = await ttrssClient.GetApiLevel();
             Console.WriteLine($"api level: {apiLevel}");
 
-            var counters = await ttrssClient.GetCounters(true, false, false, false);
-            Console.WriteLine($"{counters.Count()} counter{(counters.Count() == 1 ? "" : "s")} found");
+            var cats = await ttrssClient.GetCategories(include_empty: true);
+            Console.WriteLine($"{cats.Count()} categor{(cats.Count() == 1 ? "y" : "ies")} found");
+            var firstUnread = cats.FirstOrDefault(f => f.unread > 0);
+            if(firstUnread != null)
+            {
+                Console.WriteLine($"first unread: {firstUnread.title} (id {firstUnread.id})");
+            }
+            else
+            {
+                Console.WriteLine("no categories with feeds with unread articles.");
+            }
 
             var loggedout = await ttrssClient.Logout();
             Console.WriteLine($"logged out: {loggedout}");

ttrss/ApiClient.cs

@@ -2,9 +2,11 @@ using System.Collections.Generic;
 using System.ComponentModel;
 using Newtonsoft.Json;
 using System.Net.Http.Json;
+using ttrss_co_client.ttrss.messages;
 using ttrss_co_client.ttrss.datastructures;
 
 // https://tt-rss.org/wiki/ApiReference
+//TODO: a lot of these are a given at API level 1, so double check all necessary API levels
 
 namespace ttrss_co_client.ttrss
 {
@@ -31,11 +33,19 @@ namespace ttrss_co_client.ttrss
             };
             var content = JsonContent.Create(json);
             var response = await (await httpClient.PostAsync(BaseURI, content)).Content.ReadAsStringAsync();
-            var loginResult = JsonConvert.DeserializeObject<ttrss.messages.LoginResponse>(response);
+            var loginResult = JsonConvert.DeserializeObject<ApiResponse<LoginResponseContent>>(response);
             if (loginResult.status == 0)
             {
-                SessionId = loginResult.content.session_id;
-                api_level = loginResult.content.api_level ?? 1;
+                SessionId = loginResult.Content.session_id;
+                if(loginResult.Content.api_level == null)
+                {
+                    throw new NotImplementedException($"api doesn't report an api level - unsupported. api level 1 is version 1.5.8, so {BaseURI} might be extremely old. (or maybe this library is extremely old and ttrss changed again?)");
+                }
+                else
+                {
+                    api_level = loginResult.Content.api_level.Value;
+                }
+                
                 Console.WriteLine(SessionId);
             }
             else
@@ -46,6 +56,16 @@ namespace ttrss_co_client.ttrss
 
         public async Task<int> GetApiLevel()
         {
+            //1.5.8 = api level 1, any lower than that, unsupported.
+            //???? = 2
+            //???? = 3
+            //1.6.0 = 4
+            //1.7.6 = 5
+            //1.8 = ????
+            //???? = 6
+            //???? = 7
+            //???? = 8
+            //1.14 = 9
             assertInitialized();
             return await oneValueGet<int>("getApiLevel", "level");
         }
@@ -71,7 +91,6 @@ namespace ttrss_co_client.ttrss
         public async Task<IEnumerable<CounterInfo>> GetCounters(bool feeds = true, bool labels = true, bool categories = true, bool tags = false)
         {
             assertInitialized();
-            assertApiLevel(4);
 
             var output_mode = "";
             if (feeds) output_mode += "f";
@@ -86,34 +105,325 @@ namespace ttrss_co_client.ttrss
                 output_mode = output_mode
             });
             var response = await (await httpClient.PostAsync(BaseURI, json)).Content.ReadAsStringAsync();
-            var apiResult = JsonConvert.DeserializeObject<ttrss.messages.CounterInfoResponse>(response);
-            return apiResult.content;
+            var apiResult = JsonConvert.DeserializeObject<ApiResponse<IEnumerable<CounterInfo>>>(response);
+            return apiResult.Content;
         }
-        public async Task GetFeeds(int cat_id, bool unread_only, int limit, int offset, bool include_nested)
+        ///<param name="limit">0 for all</param>
+        ///<param name="offset">skip this amount first</param>
+        ///<param name="include_nested">idk, doesn't affect what the documentation says it should</param>
+        public async Task<IEnumerable<Feed>> GetFeeds(int cat_id = 0, bool unread_only=false, uint limit = 0, int offset = 0/*, bool include_nested*/)
         {
             assertInitialized();
-            throw new NotImplementedException();
+            if(cat_id <-2)
+            {
+                if(cat_id == -3 || cat_id == -4)
+                {
+                    assertApiLevel(4);
+                }
+                else
+                {
+                    throw new IndexOutOfRangeException($"cat_id {cat_id} is out of range");
+                }
+            }
+
+            var json = JsonContent.Create(new
+            {
+                op = "getFeeds",
+                sid = this.SessionId,
+                cat_id = cat_id,
+                unread_only = unread_only,
+                limit = limit,
+                offset = offset
+            });
+            var response = await (await httpClient.PostAsync(BaseURI, json)).Content.ReadAsStringAsync();
+            var apiResult = JsonConvert.DeserializeObject<ApiResponse<IEnumerable<Feed>>>(response);
+            return apiResult.Content;
         }
-        public async Task GetCategories(bool unread_only, bool enable_nested, bool include_empty)
+        ///<param name="enable_nested">nested mode (return only top level)</param>
+        public async Task<IEnumerable<Category>> GetCategories(bool unread_only = false, bool enable_nested = false, bool include_empty = false)
         {
             assertInitialized();
-            throw new NotImplementedException();
+            
+            var json = JsonContent.Create(new
+            {
+                op = "getCategories",
+                sid = this.SessionId,
+                unread_only = unread_only,
+                enable_nested = enable_nested,
+                include_empty = include_empty
+            });
+            var response = await (await httpClient.PostAsync(BaseURI, json)).Content.ReadAsStringAsync();
+            var apiResult = JsonConvert.DeserializeObject<ApiResponse<IEnumerable<Category>>>(response);
+            return apiResult.Content;
+
         }
         public enum VIEWMODE { All, Unread, Adaptive, Marked, Updated }
         public enum SORTORDER { Default, OldestFirst, NewestFirst }
-        public async Task GetHeadlines(int feed_id, int limit, int skip, /*string filter, */ bool is_cat, bool show_excerpt, bool show_content, VIEWMODE view_mode, bool include_attachments, int since_id, bool include_nested, SORTORDER order_by, bool sanitize, bool force_update = false, bool has_sandbox = false, bool include_header = false)
+        public async Task<IEnumerable<Headline>> GetHeadlines(
+            int feed_id,
+            bool is_cat,
+            int limit=60,
+            int skip=0,
+            /*string filter,*/
+            bool show_excerpt = false,
+            bool show_content=false,
+            VIEWMODE view_mode = VIEWMODE.All,
+            bool include_attachments = false,
+            int? since_id = null,
+            bool include_nested = false,
+            SORTORDER order_by = SORTORDER.Default,
+            bool sanitize = true,
+            bool force_update = false,
+            bool has_sandbox = false)
         {
-            await getHeadlines(feed_id, null, limit, skip, /*filter, */ is_cat, show_excerpt, show_content, view_mode, include_attachments, since_id, include_nested, order_by, sanitize, force_update, has_sandbox, include_header);
+            if(limit>60)
+            {
+                assertApiLevel(6);
+            }
+            if(limit > 200)
+            {
+                throw new ArgumentOutOfRangeException("limit", limit, "capped at 200");
+            }
+
+            if(include_nested)
+            {
+                assertApiLevel(4);
+            }
+
+            string sortOrderString = "";
+            if (order_by != SORTORDER.Default)
+            {
+                assertApiLevel(5);
+                switch (order_by)
+                {
+                    case SORTORDER.OldestFirst:
+                        sortOrderString = "date_reverse";
+                        break;
+                    case SORTORDER.NewestFirst:
+                        sortOrderString = "feed_dates";
+                        break;
+                }
+            }
+
+            if(sanitize == false)
+            {
+                //TODO: it's version 1.8.0, but no idea what version that is. I can narrow it down to 6, 7, or 8.
+                assertApiLevel(6);
+            }
+            if(force_update)
+            {
+                assertApiLevel(9);
+            }
+
+            var json = JsonContent.Create(new
+            {
+                op = "getHeadlines",
+                sid = this.SessionId,
+                feed_id = feed_id,
+                is_cat = is_cat,
+                limit = limit,
+                skip = skip,
+                show_excerpt = show_excerpt,
+                show_content = show_content,
+                view_mode = view_mode.ToString("D"),
+                include_attachments = include_attachments,
+                since_id = since_id,
+                include_nested = include_nested,
+                order_by = sortOrderString,
+                sanitize = sanitize,
+                force_update = force_update,
+                has_sandbox = has_sandbox
+            });
+            return await getHeadlines(json);
         }
-        public async Task GetHeadlines(string feed_id, int limit, int skip, /*string filter, */ bool is_cat, bool show_excerpt, bool show_content, VIEWMODE view_mode, bool include_attachments, int since_id, bool include_nested, SORTORDER order_by, bool sanitize, bool force_update = false, bool has_sandbox = false, bool include_header = false)
+        public async Task<IEnumerable<Headline>> GetHeadlinesTag(
+            string tag,
+            int limit=200,
+            int skip=0,
+            /*string filter,*/
+            bool show_excerpt = false,
+            bool show_content=false,
+            VIEWMODE view_mode = VIEWMODE.All,
+            bool include_attachments = false,
+            int? since_id = null,
+            bool include_nested = false,
+            SORTORDER order_by = SORTORDER.Default,
+            bool sanitize = true,
+            bool force_update = false,
+            bool has_sandbox = false
+            /*bool include_header = false*/)
         {
-            await getHeadlines(null, feed_id, limit, skip, /*filter, */ is_cat, show_excerpt, show_content, view_mode, include_attachments, since_id, include_nested, order_by, sanitize, force_update, has_sandbox, include_header);
+            assertApiLevel(18);
+
+            if(limit > 200)
+            {
+                throw new ArgumentOutOfRangeException("limit", limit, "capped at 200");
+            }
+
+            string sortOrderString;
+            switch(order_by)
+            {
+                case SORTORDER.OldestFirst:
+                    sortOrderString = "date_reverse";
+                    break;
+                case SORTORDER.NewestFirst:
+                    sortOrderString = "feed_dates";
+                    break;
+                default:
+                    sortOrderString = "";
+                    break;
+            }
+
+            var json = JsonContent.Create(new
+            {
+                op = "getHeadlines",
+                sid = this.SessionId,
+                feed_id = tag,
+                limit = limit,
+                skip = skip,
+                show_excerpt = show_excerpt,
+                show_content = show_content,
+                view_mode = view_mode.ToString("D"),
+                include_attachments = include_attachments,
+                since_id = since_id,
+                include_nested = include_nested,
+                order_by = sortOrderString,
+                sanitize = sanitize,
+                force_update = force_update,
+                has_sandbox = has_sandbox
+            });
+            return await getHeadlines(json);
         }
-        private async Task getHeadlines(int? int_feed_id, string string_feed_id, int limit, int skip, /*string filter, */ bool is_cat, bool show_excerpt, bool show_content, VIEWMODE view_mode, bool include_attachments, int since_id, bool include_nested, SORTORDER order_by, bool sanitize, bool force_update, bool has_sandbox, bool include_header)
+        private async Task<IEnumerable<Headline>> getHeadlines(JsonContent parameters)
         {
-            assertInitialized();
-            throw new NotImplementedException();
+            var response = await (await httpClient.PostAsync(BaseURI, parameters)).Content.ReadAsStringAsync();
+            var apiResult = JsonConvert.DeserializeObject<ApiResponse<IEnumerable<Headline>>>(response);
+            return apiResult.Content;
         }
+        // public async Task<HeadlinesHeaderResponse> GetHeadlinesAndHeader(
+        //     int feed_id,
+        //     bool is_cat,
+        //     int limit=60,
+        //     int skip=0,
+        //     /*string filter,*/
+        //     bool show_excerpt = false,
+        //     bool show_content=false,
+        //     VIEWMODE view_mode = VIEWMODE.All,
+        //     bool include_attachments = false,
+        //     int? since_id = null,
+        //     bool include_nested = false,
+        //     SORTORDER order_by = SORTORDER.Default,
+        //     bool sanitize = true,
+        //     bool force_update = false,
+        //     bool has_sandbox = false)
+        // {
+        //     assertApiLevel(12);
+        //     if(limit > 200)
+        //     {
+        //         throw new ArgumentOutOfRangeException("limit", limit, "capped at 200");
+        //     }
+
+        //     string sortOrderString = "";
+        //     if (order_by != SORTORDER.Default)
+        //     {
+        //         switch (order_by)
+        //         {
+        //             case SORTORDER.OldestFirst:
+        //                 sortOrderString = "date_reverse";
+        //                 break;
+        //             case SORTORDER.NewestFirst:
+        //                 sortOrderString = "feed_dates";
+        //                 break;
+        //         }
+        //     }
+
+        //     var json = JsonContent.Create(new
+        //     {
+        //         op = "getHeadlines",
+        //         sid = this.SessionId,
+        //         feed_id = feed_id,
+        //         is_cat = is_cat,
+        //         limit = limit,
+        //         skip = skip,
+        //         show_excerpt = show_excerpt,
+        //         show_content = show_content,
+        //         view_mode = view_mode.ToString("D"),
+        //         include_attachments = include_attachments,
+        //         since_id = since_id,
+        //         include_nested = include_nested,
+        //         order_by = sortOrderString,
+        //         sanitize = sanitize,
+        //         force_update = force_update,
+        //         has_sandbox = has_sandbox,
+        //         include_header = true
+        //     });
+        //     return await getHeadlinesAndHeader(json);
+        // }
+        // public async Task<HeadlinesHeaderResponse> GetHeadlinesTagAndHeader(
+        //     string tag,
+        //     int limit=200,
+        //     int skip=0,
+        //     /*string filter,*/
+        //     bool show_excerpt = false,
+        //     bool show_content=false,
+        //     VIEWMODE view_mode = VIEWMODE.All,
+        //     bool include_attachments = false,
+        //     int? since_id = null,
+        //     bool include_nested = false,
+        //     SORTORDER order_by = SORTORDER.Default,
+        //     bool sanitize = true,
+        //     bool force_update = false,
+        //     bool has_sandbox = false
+        //     /*bool include_header = false*/)
+        // {
+        //     assertApiLevel(18);
+
+        //     if(limit > 200)
+        //     {
+        //         throw new ArgumentOutOfRangeException("limit", limit, "capped at 200");
+        //     }
+
+        //     string sortOrderString;
+        //     switch(order_by)
+        //     {
+        //         case SORTORDER.OldestFirst:
+        //             sortOrderString = "date_reverse";
+        //             break;
+        //         case SORTORDER.NewestFirst:
+        //             sortOrderString = "feed_dates";
+        //             break;
+        //         default:
+        //             sortOrderString = "";
+        //             break;
+        //     }
+
+        //     var json = JsonContent.Create(new
+        //     {
+        //         op = "getHeadlines",
+        //         sid = this.SessionId,
+        //         feed_id = tag,
+        //         limit = limit,
+        //         skip = skip,
+        //         show_excerpt = show_excerpt,
+        //         show_content = show_content,
+        //         view_mode = view_mode.ToString("D"),
+        //         include_attachments = include_attachments,
+        //         since_id = since_id,
+        //         include_nested = include_nested,
+        //         order_by = sortOrderString,
+        //         sanitize = sanitize,
+        //         force_update = force_update,
+        //         has_sandbox = has_sandbox,
+        //         include_header = true
+        //     });
+        //     return await getHeadlinesAndHeader(json);
+        // }
+        // private async Task<HeadlinesHeaderResponse> getHeadlinesAndHeader(JsonContent parameters)
+        // {
+        //     var response = await (await httpClient.PostAsync(BaseURI, parameters)).Content.ReadAsStringAsync();
+        //     var apiResult = JsonConvert.DeserializeObject<ttrss.messages.HeadlinesHeaderResponse>(response);
+        //     return apiResult;
+        // }
         public enum UPDATEMODE { SetFalse, SetTrue, Toggle }
         public enum UPDATEFIELD { starred, published, unread }
         public async Task<int> UpdateArticleField(UPDATEMODE mode, UPDATEFIELD field, params int[] ids)
@@ -232,7 +542,7 @@ namespace ttrss_co_client.ttrss
                 sid = this.SessionId
             });
             var response = await (await httpClient.PostAsync(BaseURI, json)).Content.ReadAsStringAsync();
-            var apiResult = JsonConvert.DeserializeObject<ttrss.messages.GenericApiResponse>(response);
+            var apiResult = JsonConvert.DeserializeObject<ttrss.messages.ApiResponse<Dictionary<string, string>>>(response);
             try
             {
                 var converter = TypeDescriptor.GetConverter(typeof(T));

ttrss/datastructures/Category.cs

@@ -0,0 +1,12 @@
+using System.Collections.Generic;
+
+namespace ttrss_co_client.ttrss.datastructures
+{
+    public class Category
+    {
+        public int id { get; set; }
+        public string title { get; set; }
+        public int unread { get; set; }
+        public int order_id { get; set; }
+    }
+}

ttrss/datastructures/Feed.cs

@@ -0,0 +1,25 @@
+using System.Collections.Generic;
+
+namespace ttrss_co_client.ttrss.datastructures
+{
+    public class Feed
+    {
+        public int id { get; set; }
+        public Uri feed_url { get; set; }
+        public string title { get; set; }
+        public int unread { get; set; }
+        public bool has_icon { get; set; }
+        public int cat_id { get; set; }
+        ///<summary>unix timestamp, see <see cref="TimeStamp" /></summary>
+        public int last_updated { get; set; }
+        public DateTime? TimeStamp 
+        { 
+            get 
+            {
+                return  new DateTime(1970,1,1,0,0,0,0,System.DateTimeKind.Utc)
+                    .AddSeconds( last_updated ).ToLocalTime();
+            }
+        }
+        public int order_id { get; set; }
+    }
+}

ttrss/datastructures/Headline.cs

@@ -0,0 +1,32 @@
+using System.Collections.Generic;
+
+namespace ttrss_co_client.ttrss.datastructures
+{
+    public class Headline
+    {
+        public int id { get; set; }
+        public Guid guid { get; set; }
+        public bool unread { get; set; }
+        public bool marked { get; set; }
+        public bool published { get; set; }
+        public int updated { get; set; }
+        public bool is_updated { get; set; }
+        public string title { get; set; }
+        public Uri link { get; set; }
+        public int feed_id { get; set; }
+        public IEnumerable<string> tags { get; set; }
+        public string content { get; set; }
+        ///See <cref name="ttrss_co_client.ttrss.datastructures.Label" />
+        public IEnumerable<IEnumerable<string>> labels { get; set; }
+        public string feed_title { get; set; }
+        public int comments_count { get; set; }
+        public Uri comments_link { get; set; }
+        public bool always_display_attachments { get; set; }
+        public string author { get; set; }
+        public double score { get; set; }
+        public string note { get; set; }
+        public string lang { get; set; }
+        public Uri flavor_image { get; set; }
+        public string flavor_stream { get; set; }
+    }
+}

ttrss/datastructures/Label.cs

@@ -0,0 +1,19 @@
+using System.Collections.Generic;
+
+namespace ttrss_co_client.ttrss.datastructures
+{
+    public class Label
+    {
+        public Label(string[] fromServer)
+        {
+            int.TryParse(fromServer[0], out id);
+            Title = fromServer[1];
+            unknown = fromServer[2];
+            Color =  System.Drawing.ColorTranslator.FromHtml(fromServer[3]);
+        }
+        public int id;
+        public string Title { get; set; }
+        public string unknown { get; set; }
+        public System.Drawing.Color Color {get; set;}
+    }
+}

ttrss/messages/ApiResponse.cs

@@ -2,13 +2,10 @@ using System.Collections.Generic;
 
 namespace ttrss_co_client.ttrss.messages
 {
-    public abstract class ApiResponse
+    public class ApiResponse<T>
     {
         public int seq { get; set; }
         public int status { get; set; }
-    }
-    public class GenericApiResponse : ApiResponse
-    {
-        public Dictionary<string, string> Content{get; set;}
+        public T Content {get; set;}
     }
 }

ttrss/messages/CounterInfoResponse.cs

@@ -1,9 +0,0 @@
-using ttrss_co_client.ttrss.datastructures;
-
-namespace ttrss_co_client.ttrss.messages
-{
-    public class CounterInfoResponse : ApiResponse
-    {
-        public IEnumerable<CounterInfo> content { get; set; }
-    }
-}

ttrss/messages/HeadlinesHeaderResponse.cs

@@ -0,0 +1,11 @@
+using ttrss_co_client.ttrss.datastructures;
+
+namespace ttrss_co_client.ttrss.messages
+{
+    public class HeadlinesHeaderContent
+    {
+        public int id { get; set; }
+        public int first_id { get; set; }
+        public bool is_cat { get; set; }
+    }
+}

ttrss/messages/LoginResponse.cs

@@ -1,15 +0,0 @@
-namespace ttrss_co_client.ttrss.messages
-{
-    public class LoginResponse : ApiResponse
-    {
-        public Content content { get; set; }
-
-        public class Content
-        {
-            public string session_id { get; set; }
-            public Configuration config { get; set; }
-            public int? api_level { get; set; }
-            public string error { get; set; }
-        }
-    }
-}

ttrss/messages/LoginResponseContent.cs

@@ -0,0 +1,10 @@
+namespace ttrss_co_client.ttrss.messages
+{
+    public class LoginResponseContent
+    {
+        public string session_id { get; set; }
+        public Configuration config { get; set; }
+        public int? api_level { get; set; }
+        public string error { get; set; }
+    }
+}