Merge pull request #2095 from tidusjar/feature/mattermost-fix

Fixed #2055 and #1903

src/Ombi.Api.Mattermost/IMattermostApi.cs

@@ -5,6 +5,6 @@ namespace Ombi.Api.Mattermost
 {
     public interface IMattermostApi
     {
-        Task<string> PushAsync(string webhook, MattermostBody message);
+        Task PushAsync(string webhook, MattermostMessage message);
     }
 }

src/Ombi.Api.Mattermost/MattermostApi.cs

@@ -14,14 +14,10 @@ public MattermostApi(IApi api)
 
         private readonly IApi _api;
 
-        public async Task<string> PushAsync(string webhook, MattermostBody message)
+        public async Task PushAsync(string webhook, MattermostMessage message)
         {
-            var request = new Request(string.Empty, webhook, HttpMethod.Post);
-
-            request.AddJsonBody(message);
-
-            var result = await _api.RequestContent(request);
-            return result;
+            var client = new MatterhookClient(webhook);
+            await client.PostAsync(_api, message);
         }
     }
 }

src/Ombi.Api.Mattermost/Models/MattermostClient.cs

@@ -0,0 +1,168 @@
+///
+/// 
+/// 
+/// Code taken from https://github.com/PromoFaux/Matterhook.NET.MatterhookClient
+/// 
+/// 
+/// 
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net.Http;
+using System.Text;
+using System.Threading.Tasks;
+using Newtonsoft.Json;
+
+namespace Ombi.Api.Mattermost.Models
+{
+    public class MatterhookClient
+    {
+        private readonly Uri _webhookUrl;
+        private readonly HttpClient _httpClient = new HttpClient();
+
+        /// <summary>
+        /// Create a new Mattermost Client
+        /// </summary>
+        /// <param name="webhookUrl">The URL of your Mattermost Webhook</param>
+        /// <param name="timeoutSeconds">Timeout Value (Default 100)</param>
+        public MatterhookClient(string webhookUrl, int timeoutSeconds = 100)
+        {
+            if (!Uri.TryCreate(webhookUrl, UriKind.Absolute, out _webhookUrl))
+                throw new ArgumentException("Mattermost URL invalid");
+
+            _httpClient.Timeout = new TimeSpan(0, 0, 0, timeoutSeconds);
+        }
+
+        public MattermostMessage CloneMessage(MattermostMessage inMsg)
+        {
+            var outMsg = new MattermostMessage
+            {
+                Text = "",
+                Channel = inMsg.Channel,
+                Username = inMsg.Username,
+                IconUrl = inMsg.IconUrl
+            };
+
+            return outMsg;
+        }
+
+        private static MattermostAttachment CloneAttachment(MattermostAttachment inAtt)
+        {
+            var outAtt = new MattermostAttachment
+            {
+                AuthorIcon = inAtt.AuthorIcon,
+                AuthorLink = inAtt.AuthorLink,
+                AuthorName = inAtt.AuthorName,
+                Color = inAtt.Color,
+                Fallback = inAtt.Fallback,
+                Fields = inAtt.Fields,
+                ImageUrl = inAtt.ImageUrl,
+                Pretext = inAtt.Pretext,
+                ThumbUrl = inAtt.ThumbUrl,
+                Title = inAtt.Title,
+                TitleLink = inAtt.TitleLink,
+                Text = ""
+            };
+            return outAtt;
+        }
+
+        /// <summary>
+        /// Post Message to Mattermost server. Messages will be automatically split if total text length > 4000
+        /// </summary>
+        /// <param name="api"></param>
+        /// <param name="inMessage">The messsage you wish to send</param>
+        /// <returns></returns>
+        public async Task PostAsync(IApi api, MattermostMessage inMessage)
+        {
+            try
+            {
+                var outMessages = new List<MattermostMessage>();
+
+                var msgCount = 0;
+
+                var lines = new string[] { };
+                if (inMessage.Text != null)
+                {
+                    lines = inMessage.Text.Split(new[] { "\r\n", "\r", "\n" }, StringSplitOptions.None);
+                }
+
+                //start with one cloned inMessage in the list
+                outMessages.Add(CloneMessage(inMessage));
+
+                //add text from original. If we go over 3800, we'll split it to a new inMessage.
+                foreach (var line in lines)
+                {
+
+                    if (line.Length + outMessages[msgCount].Text.Length > 3800)
+                    {
+
+                        msgCount += 1;
+                        outMessages.Add(CloneMessage(inMessage));
+                    }
+
+                    outMessages[msgCount].Text += $"{line}\r\n";
+                }
+
+                //Length of text on the last (or first if only one) inMessage.
+                var lenMessageText = outMessages[msgCount].Text.Length;
+
+                //does our original have attachments?
+                if (inMessage.Attachments?.Any() ?? false)
+                {
+                    outMessages[msgCount].Attachments = new List<MattermostAttachment>();
+
+                    //loop through them in a similar fashion to the inMessage text above.
+                    foreach (var att in inMessage.Attachments)
+                    {
+                        //add this attachment to the outgoing message
+                        outMessages[msgCount].Attachments.Add(CloneAttachment(att));
+                        //get a count of attachments on this message, and subtract one so we know the index of the current new attachment
+                        var attIndex = outMessages[msgCount].Attachments.Count - 1;
+
+                        //Get the text lines
+                        lines = att.Text.Split(new[] { "\r\n", "\r", "\n" }, StringSplitOptions.None);
+
+                        foreach (var line in lines)
+                        {
+                            //Get the total length of all attachments on the current outgoing message
+                            var lenAllAttsText = outMessages[msgCount].Attachments.Sum(a => a.Text.Length);
+
+                            if (lenMessageText + lenAllAttsText + line.Length > 3800)
+                            {
+                                msgCount += 1;
+                                attIndex = 0;
+                                outMessages.Add(CloneMessage(inMessage));
+                                outMessages[msgCount].Attachments = new List<MattermostAttachment> { CloneAttachment(att) };
+                            }
+
+                            outMessages[msgCount].Attachments[attIndex].Text += $"{line}\r\n";
+                        }
+                    }
+                }
+
+
+                if (outMessages.Count > 1)
+                {
+                    var num = 1;
+                    foreach (var msg in outMessages)
+                    {
+                        msg.Text = $"`({num}/{msgCount + 1}): ` " + msg.Text;
+                        num++;
+                    }
+                }
+
+                foreach (var msg in outMessages)
+                {
+                    var request = new Request("", _webhookUrl.ToString(), HttpMethod.Post);
+                    request.AddJsonBody(msg);
+                    await api.Request(request);
+                }
+            }
+            catch (Exception e)
+            {
+                Console.WriteLine(e.Message);
+                throw;
+            }
+        }
+    }
+}

src/Ombi.Api.Mattermost/Models/MattermostMessage.cs

@@ -0,0 +1,181 @@
+///
+/// 
+/// 
+/// Code taken from https://github.com/PromoFaux/Matterhook.NET.MatterhookClient
+/// 
+/// 
+/// 
+using System;
+using System.Collections.Generic;
+using Newtonsoft.Json;
+
+namespace Ombi.Api.Mattermost.Models
+
+{
+    public class MattermostMessage
+    {
+
+        //https://docs.mattermost.com/developer/webhooks-incoming.html
+
+        /// <summary>
+        /// Channel to post to
+        /// </summary>
+        [JsonProperty(PropertyName = "channel")]
+        public string Channel { get; set; }
+
+        /// <summary>
+        /// Username for bot
+        /// </summary>
+        [JsonProperty(PropertyName = "username")]
+        public string Username { get; set; }
+
+        /// <summary>
+        /// Bot/User Icon
+        /// </summary>
+        [JsonProperty(PropertyName = "icon_url")]
+        public Uri IconUrl { get; set; }
+
+        /// <summary>
+        /// Message body. Supports Markdown
+        /// </summary>
+        [JsonProperty(PropertyName = "text")]
+        public string Text { get; set; }
+
+        /// <summary>
+        /// Richtext attachments 
+        /// </summary>
+        [JsonProperty(PropertyName = "attachments")]
+        public List<MattermostAttachment> Attachments { get; set; }
+
+    }
+
+    /// <summary>
+    /// https://docs.mattermost.com/developer/message-attachments.html#message-attachments
+    /// </summary>
+    public class MattermostAttachment
+    {
+        //https://docs.mattermost.com/developer/message-attachments.html#attachment-options
+        #region AttachmentOptions
+
+        /// <summary>
+        /// A required plain-text summary of the post. This is used in notifications, and in clients that don’t support formatted text (eg IRC).
+        /// </summary>
+        [JsonProperty(PropertyName = "fallback")]
+        public string Fallback { get; set; }
+
+        /// <summary>
+        /// A hex color code that will be used as the left border color for the attachment. If not specified, it will default to match the left hand sidebar header background color.
+        /// </summary>
+        [JsonProperty(PropertyName = "color")]
+        public string Color { get; set; }
+
+        /// <summary>
+        /// Optional text that should appear above the formatted data
+        /// </summary>
+        [JsonProperty(PropertyName = "pretext")]
+        public string Pretext { get; set; }
+
+        /// <summary>
+        /// The text to be included in the attachment. It can be formatted using Markdown. If it includes more than 300 characters or more than 5 line breaks, the message will be collapsed and a “Show More” link will be added to expand the message.
+        /// </summary>
+        [JsonProperty(PropertyName = "text")]
+        public string Text { get; set; }
+
+        #endregion
+
+        //https://docs.mattermost.com/developer/message-attachments.html#author-details
+        #region AuthorDetails 
+
+        /// <summary>
+        /// An optional name used to identify the author. It will be included in a small section at the top of the attachment.
+        /// </summary>
+        [JsonProperty(PropertyName = "author_name")]
+        public string AuthorName { get; set; }
+
+        /// <summary>
+        /// An optional URL used to hyperlink the author_name. If no author_name is specified, this field does nothing.
+        /// </summary>
+        [JsonProperty(PropertyName = "author_link")]
+        public Uri AuthorLink { get; set; }
+
+        /// <summary>
+        ///  An optional URL used to display a 16x16 pixel icon beside the author_name.
+        /// </summary>
+        [JsonProperty(PropertyName = "author_icon")]
+        public Uri AuthorIcon { get; set; }
+
+        #endregion
+
+        //https://docs.mattermost.com/developer/message-attachments.html#titles
+        #region Titles
+
+        /// <summary>
+        /// An optional title displayed below the author information in the attachment.
+        /// </summary>
+        [JsonProperty(PropertyName = "title")]
+        public string Title { get; set; }
+
+        /// <summary>
+        ///  An optional URL used to hyperlink the title. If no title is specified, this field does nothing.
+        /// </summary>
+        [JsonProperty(PropertyName = "title_link")]
+        public Uri TitleLink { get; set; }
+
+        #endregion
+
+
+        #region Fields
+
+        /// <summary>
+        /// Fields can be included as an optional array within attachments, and are used to display information in a table format inside the attachment.
+        /// </summary>
+        [JsonProperty(PropertyName = "fields")]
+        public List<MattermostField> Fields { get; set; }
+
+        #endregion
+
+        //https://docs.mattermost.com/developer/message-attachments.html#images
+        #region Images
+
+        /// <summary>
+        /// An optional URL to an image file (GIF, JPEG, PNG, or BMP) that is displayed inside a message attachment.
+        /// Large images are resized to a maximum width of 400px or a maximum height of 300px, while still maintaining the original aspect ratio.
+        /// </summary>
+        [JsonProperty(PropertyName = "image_url")]
+        public Uri ImageUrl { get; set; }
+
+        /// <summary>
+        /// An optional URL to an image file(GIF, JPEG, PNG, or BMP) that is displayed as a 75x75 pixel thumbnail on the right side of an attachment.
+        /// We recommend using an image that is already 75x75 pixels, but larger images will be scaled down with the aspect ratio maintained.
+        /// </summary>
+        [JsonProperty(PropertyName = "thumb_url")]
+        public Uri ThumbUrl { get; set; }
+
+
+        #endregion
+    }
+
+    /// <summary>
+    /// https://docs.mattermost.com/developer/message-attachments.html#fieldshttps://docs.mattermost.com/developer/message-attachments.html#fields
+    /// </summary>
+    public class MattermostField
+    {
+        /// <summary>
+        /// A title shown in the table above the value.
+        /// </summary>
+        [JsonProperty(PropertyName = "title")]
+        public string Title { get; set; }
+
+        /// <summary>
+        /// The text value of the field. It can be formatted using Markdown.
+        /// </summary>
+        [JsonProperty(PropertyName = "value")]
+        public string Value { get; set; }
+
+        /// <summary>
+        /// Optionally set to “True” or “False” to indicate whether the value is short enough to be displayed beside other values.
+        /// </summary>
+        [JsonProperty(PropertyName = "short")]
+        public bool Short { get; set; }
+    }
+}