Add SlackClient and Interactive Command support

src/SlackDotNet/Enums/InteractiveMessageType.cs

@@ -0,0 +1,19 @@
+using SlackDotNet.Models.Messages.Payloads.EventsAPI;
+using SlackDotNet.Models.Messages.Payloads.Interactive;
+
+namespace SlackDotNet.Enums
+{
+    public enum InteractiveMessageType
+    {
+        block_actions,
+
+        shortcut,
+
+        message_actions,
+
+        [Type(typeof(ViewSubmission))]
+        view_submission,
+
+        view_closed
+    }
+}

src/SlackDotNet/Extensions/IServiceCollectionExtension.cs

@@ -23,8 +23,11 @@ public static IServiceCollection AddSlackDotNet(this IServiceCollection services
             services.TryAddSingleton<ISlashCommandHandler, SlashCommandHandler>();
             services.TryAddSingleton<IHelloHandler, HelloHandler>();
             services.TryAddSingleton<IEventsAPIHandler, EventsAPIHandler>();
+            services.TryAddSingleton<IInteractiveHandler, InteractiveHandler>();
 
             services.AddSingleton<ISlackSocket, SlackSocket>();
+
+            services.AddSingleton<ISlackClient, SlackClient>();
             return services;
         }
     }

src/SlackDotNet/Handlers/IInteractiveHandler.cs

@@ -0,0 +1,14 @@
+using System.Threading.Tasks;
+using SlackDotNet.Models;
+using SlackDotNet.Models.Messages;
+
+namespace SlackDotNet.Handlers
+{
+    /// <summary>
+    /// Handler for WebSocket "interactive" messages.
+    /// </summary>
+    public interface IInteractiveHandler
+    {
+        Task<SlackWebSocketMessageResponse> Handle(InteractiveMessage interactiveMessage);
+    }
+}

src/SlackDotNet/Handlers/InteractiveHandler.cs

@@ -0,0 +1,26 @@
+using System.Threading.Tasks;
+using Microsoft.Extensions.Logging;
+using SlackDotNet.Models;
+using SlackDotNet.Models.Messages;
+
+namespace SlackDotNet.Handlers
+{
+    public class InteractiveHandler : IInteractiveHandler
+    {
+        public ILogger<InteractiveHandler> Logger { get; }
+
+        public InteractiveHandler(ILogger<InteractiveHandler> logger)
+        {
+            Logger = logger;
+        }
+
+        public async Task<SlackWebSocketMessageResponse> Handle(InteractiveMessage interactiveMessage)
+        {
+            await Task.Run(() =>
+                Logger.LogWarning($"Received unhandled `{interactiveMessage.Type}` message from WebSocket.")
+            );
+
+            return new SlackWebSocketMessageResponse(interactiveMessage);
+        }
+    }
+}

src/SlackDotNet/ISlackClient.cs

@@ -0,0 +1,65 @@
+using System.Threading.Tasks;
+using SlackDotNet.Models;
+using SlackDotNet.Models.Messages;
+using SlackDotNet.Models.Responses;
+
+namespace SlackDotNet
+{
+    public interface ISlackClient
+    {
+        /// <summary>
+        /// Get's a slack user's information
+        /// </summary>
+        /// <param name="userId"></param>
+        /// <returns></returns>
+        Task<User> GetUser(string userId);
+
+        /// <summary>
+        /// Posts a message to a channel
+        /// </summary>
+        /// <param name="message"></param>
+        /// <returns></returns>
+        Task<ChatMessageResponse> PostMessage(ChatMessage message, bool ephemeral = false);
+
+        /// <summary>
+        /// Deletes a message in response to an interactive command
+        /// </summary>
+        /// <param name="responseUrl"></param>
+        /// <returns></returns>
+        Task<bool> DeleteResponse(string responseUrl);
+
+        /// <summary>
+        /// Gets the user's ID from their display name
+        /// </summary>
+        /// <param name="username"></param>
+        /// <returns></returns>
+        Task<string> GetUserId(string username);
+
+        /// <summary>
+        /// Gets the user's display name from their username
+        /// </summary>
+        /// <param name="userId"></param>
+        /// <returns></returns>
+        Task<string> GetUserName(string userId);
+
+        /// <summary>
+        /// Get's all the emojis in the workspace as a dictionary of name => URL
+        /// </summary>
+        /// <returns></returns>
+        Task<Emojis> GetEmojisAndUrls();
+
+        /// <summary>
+        /// Publish a view.
+        /// </summary>
+        /// <param name="request"></param>
+        /// <returns></returns>
+        Task<PublishViewResponse> PublishView(PublishViewRequest request);
+
+        /// <summary>
+        /// Open a view.
+        /// </summary>
+        /// <param name="request"></param>
+        /// <returns></returns>
+        Task<PublishViewResponse> OpenView(OpenViewRequest request);
+    }
+}

src/SlackDotNet/Models/Block.cs

@@ -0,0 +1,152 @@
+using System.Collections.Generic;
+using Newtonsoft.Json;
+
+namespace SlackDotNet.Models
+{
+    public class Block
+    {
+        /// <summary>
+        /// The type of the block:
+        /// `actions`, `context`, `divider`, `file`, `header`, `image`, `input`, `section`
+        /// </summary>
+        [JsonProperty("type")]
+        public string Type { get; set; }
+
+        /// <summary>
+        /// An array of interactive elemnts.
+        /// Max of 25.
+        ///
+        /// Valid for: `actions`, `context`
+        /// </summary>
+        [JsonProperty("elements")]
+        public List<BlockElement> Elements { get; set; }
+
+        /// <summary>
+        /// A string acting as a unique identifier for a block.
+        /// If not specified, a block_id will be generated.
+        /// You can use this block_id when you receive an interaction payload to identify the source of the action.
+        /// Maximum length for this field is 255 characters.
+        /// block_id should be unique for each message and each iteration of a message.
+        /// If a message is updated, use a new block_id.
+        ///
+        /// Valid for: `actions`, `context`, `divider`, `file`, `header`, `image`, `input`, `section`
+        /// </summary>
+        [JsonProperty("block_id")]
+        public string BlockId { get; set; }
+
+        /// <summary>
+        /// The external unique ID for this file.
+        ///
+        /// Valid for: `file`
+        /// </summary>
+        [JsonProperty("external_id")]
+        public string ExternalId { get; set; }
+
+        /// <summary>
+        /// At the moment, source should always be `remote` for a remote file.
+        ///
+        /// Valid for: `file`
+        /// </summary>
+        [JsonProperty("source")]
+        public string Source { get; set; }
+
+        /// <summary>
+        /// The text for the block, in the form of a `plain_text` text object.
+        /// Maximum length for the text in this field is 150 characters.
+        ///
+        /// Valid for: `header`, `section`
+        /// </summary>
+        [JsonProperty("text")]
+        public TextBlock Text { get; set; }
+
+        /// <summary>
+        /// The URL of the image to be displayed. Maximum length for this field is 3000 characters.
+        ///
+        /// Valid for: `image`
+        /// </summary>
+        [JsonProperty("image_url")]
+        public string ImageUrl { get; set; }
+
+        /// <summary>
+        /// A plain-text summary of the image. This should not contain any markup.
+        /// Maximum length for this field is 2000 characters
+        ///
+        /// Valid for: `image`
+        /// </summary>
+        [JsonProperty("alt_text")]
+        public string AltText { get; set; }
+
+        /// <summary>
+        /// An optional title for the image in the form of a text object that can only be of type: plain_text.
+        /// Maximum length for the text in this field is 2000 characters.
+        ///
+        /// Valid for: `image`
+        /// </summary>
+        [JsonProperty("title")]
+        public TextBlock Title { get; set; }
+
+        /// <summary>
+        /// A label that appears above an input element in the form of a text object that must have type of plain_text.
+        /// Maximum length for the text in this field is 2000 characters.
+        ///
+        /// Valid for: `input`
+        /// </summary>
+        [JsonProperty("label")]
+        public TextBlock Label { get; set; }
+
+        /// <summary>
+        /// A plain-text input element, a checkbox element, a radio button element, a select menu element,
+        /// a multi-select menu element, or a datepicker.
+        ///
+        /// Valid for: `input`
+        /// </summary>
+        [JsonProperty("element")]
+        public BlockElement Element { get; set; }
+
+        /// <summary>
+        /// A boolean that indicates whether or not the use of elements in this block should dispatch a block_actions payload.
+        /// Defaults to false.
+        ///
+        /// Valid for: `input`
+        /// </summary>
+        [JsonProperty("dispatch_action")]
+        public bool? DispatchAction { get; set; }
+
+        /// <summary>
+        /// An optional hint that appears below an input element in a lighter grey.
+        /// It must be a text object with a type of plain_text.
+        /// Maximum length for the text in this field is 2000 characters.
+        ///
+        /// Valid for: `input`
+        /// </summary>
+        [JsonProperty("hint")]
+        public TextBlock Hint { get; set; }
+
+        /// <summary>
+        /// A boolean that indicates whether the input element may be empty when a user submits the modal.
+        /// Defaults to false.
+        ///
+        /// Valid for: `input`
+        /// </summary>
+        [JsonProperty("optional")]
+        public bool? Optional { get; set; }
+
+        /// <summary>
+        /// Required if no text is provided. A List of text objects.
+        /// Any text objects included with fields will be rendered in a compact format that allows for 2 columns of side-by-side text.
+        /// Maximum number of items is 10. Maximum length for the text in each item is 2000 characters.
+        ///
+        /// Valid for: `section`
+        /// </summary>
+        [JsonProperty("fields")]
+        public List<TextBlock> Fields { get; set; }
+
+        /// <summary>
+        /// One of the available element objects.
+        ///
+        /// Valid for: `section`
+        /// </summary>
+        [JsonProperty("accessory")]
+        public BlockElement Accessory { get; set; }
+    }
+}