Merge pull request #169 from RogueException/issues/168

Support GET /channels/{id}/pins

src/Discord.Net/API/DiscordRestApiClient.cs

@@ -357,6 +357,12 @@ namespace Discord.API
 
             await SendAsync("DELETE", $"channels/{channelId}/pins/{messageId}", options: options).ConfigureAwait(false);
         }
+        public async Task<IReadOnlyCollection<Message>> GetPinsAsync(ulong channelId, RequestOptions options = null)
+        {
+            Preconditions.NotEqual(channelId, 0, nameof(channelId));
+
+            return await SendAsync<IReadOnlyCollection<Message>>("GET", $"channels/{channelId}/pins", options: options).ConfigureAwait(false);
+        }
 
         //Channel Recipients
         public async Task AddGroupRecipientAsync(ulong channelId, ulong userId, RequestOptions options = null)

src/Discord.Net/Entities/Channels/IMessageChannel.cs

@@ -23,6 +23,8 @@ namespace Discord
         Task<IReadOnlyCollection<IMessage>> GetMessagesAsync(int limit = DiscordConfig.MaxMessagesPerBatch);
         /// <summary> Gets a collection of messages in this channel. </summary>
         Task<IReadOnlyCollection<IMessage>> GetMessagesAsync(ulong fromMessageId, Direction dir, int limit = DiscordConfig.MaxMessagesPerBatch);
+        /// <summary> Gets a collection of pinned messages in this channel. </summary>
+        Task<IReadOnlyCollection<IMessage>> GetPinnedMessagesAsync();
         /// <summary> Bulk deletes multiple messages. </summary>
         Task DeleteMessagesAsync(IEnumerable<IMessage> messages);        
 

src/Discord.Net/Rest/Entities/Channels/DMChannel.cs

@@ -108,6 +108,11 @@ namespace Discord
         {
             await Discord.ApiClient.DeleteDMMessagesAsync(Id, new DeleteMessagesParams { MessageIds = messages.Select(x => x.Id) }).ConfigureAwait(false);
         }   
+        public async Task<IReadOnlyCollection<IMessage>> GetPinnedMessagesAsync()
+        {
+            var models = await Discord.ApiClient.GetPinsAsync(Id);
+            return models.Select(x => new Message(this, new User(x.Author.Value), x)).ToImmutableArray();
+        }
 
         public async Task TriggerTypingAsync()
         {

src/Discord.Net/Rest/Entities/Channels/GroupChannel.cs

@@ -133,6 +133,11 @@ namespace Discord
         {
             await Discord.ApiClient.DeleteDMMessagesAsync(Id, new DeleteMessagesParams { MessageIds = messages.Select(x => x.Id) }).ConfigureAwait(false);
         }
+        public async Task<IReadOnlyCollection<IMessage>> GetPinnedMessagesAsync()
+        {
+            var models = await Discord.ApiClient.GetPinsAsync(Id);
+            return models.Select(x => new Message(this, new User(x.Author.Value), x)).ToImmutableArray();
+        }
 
         public async Task TriggerTypingAsync()
         {

src/Discord.Net/Rest/Entities/Channels/TextChannel.cs

@@ -102,7 +102,12 @@ namespace Discord
         {
             await Discord.ApiClient.DeleteMessagesAsync(Guild.Id, Id, new DeleteMessagesParams { MessageIds = messages.Select(x => x.Id) }).ConfigureAwait(false);
         }
-        
+        public async Task<IReadOnlyCollection<IMessage>> GetPinnedMessagesAsync()
+        {
+            var models = await Discord.ApiClient.GetPinsAsync(Id);
+            return models.Select(x => new Message(this, new User(x.Author.Value), x)).ToImmutableArray();
+        }
+
         public async Task TriggerTypingAsync()
         {
             await Discord.ApiClient.TriggerTypingIndicatorAsync(Id).ConfigureAwait(false);