From 89c106169bd2a16310fdaa6e0c48a3402d97de3a Mon Sep 17 00:00:00 2001
From: 杨宇千 <crupest@outlook.com>
Date: Thu, 24 Oct 2019 16:56:41 +0800
Subject: ...

---
 Timeline/Services/AvatarFormatException.cs | 51 ++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 Timeline/Services/AvatarFormatException.cs

(limited to 'Timeline/Services/AvatarFormatException.cs')

diff --git a/Timeline/Services/AvatarFormatException.cs b/Timeline/Services/AvatarFormatException.cs
new file mode 100644
index 00000000..788eabb2
--- /dev/null
+++ b/Timeline/Services/AvatarFormatException.cs
@@ -0,0 +1,51 @@
+using System;
+using System.Globalization;
+
+namespace Timeline.Services
+{
+    /// <summary>
+    /// Thrown when avatar is of bad format.
+    /// </summary>
+    [Serializable]
+    public class AvatarFormatException : Exception
+    {
+        public enum ErrorReason
+        {
+            /// <summary>
+            /// Decoding image failed.
+            /// </summary>
+            CantDecode,
+            /// <summary>
+            /// Decoding succeeded but the real type is not the specified type.
+            /// </summary>
+            UnmatchedFormat,
+            /// <summary>
+            /// Image is not a square.
+            /// </summary>
+            BadSize
+        }
+
+        public AvatarFormatException() : base(MakeMessage(null)) { }
+        public AvatarFormatException(string message) : base(message) { }
+        public AvatarFormatException(string message, Exception inner) : base(message, inner) { }
+
+        public AvatarFormatException(Avatar avatar, ErrorReason error) : base(MakeMessage(error)) { Avatar = avatar; Error = error; }
+        public AvatarFormatException(Avatar avatar, ErrorReason error, Exception inner) : base(MakeMessage(error), inner) { Avatar = avatar; Error = error; }
+
+        protected AvatarFormatException(
+          System.Runtime.Serialization.SerializationInfo info,
+          System.Runtime.Serialization.StreamingContext context) : base(info, context) { }
+
+        private static string MakeMessage(ErrorReason? reason) =>
+            string.Format(CultureInfo.InvariantCulture, Resources.Services.Exception.AvatarFormatException, reason switch
+            {
+                ErrorReason.CantDecode => Resources.Services.Exception.AvatarFormatExceptionCantDecode,
+                ErrorReason.UnmatchedFormat => Resources.Services.Exception.AvatarFormatExceptionUnmatchedFormat,
+                ErrorReason.BadSize => Resources.Services.Exception.AvatarFormatExceptionBadSize,
+                _ => Resources.Services.Exception.AvatarFormatExceptionUnknownError
+            });
+
+        public ErrorReason? Error { get; set; }
+        public Avatar? Avatar { get; set; }
+    }
+}
-- 
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