Add fax admin panel (#15215)

Content.Shared/Fax/AdminFaxEui.cs

@@ -0,0 +1,68 @@
+using Content.Shared.Eui;
+using Robust.Shared.Serialization;
+
+namespace Content.Shared.Fax;
+
+[Serializable, NetSerializable]
+public sealed class AdminFaxEuiState : EuiStateBase
+{
+    public List<AdminFaxEntry> Entries { get; }
+
+    public AdminFaxEuiState(List<AdminFaxEntry> entries)
+    {
+        Entries = entries;
+    }
+}
+
+[Serializable, NetSerializable]
+public sealed class AdminFaxEntry
+{
+    public EntityUid Uid { get; }
+    public string Name { get; }
+    public string Address { get; }
+
+    public AdminFaxEntry(EntityUid uid, string name, string address)
+    {
+        Uid = uid;
+        Name = name;
+        Address = address;
+    }
+}
+
+public static class AdminFaxEuiMsg
+{
+    [Serializable, NetSerializable]
+    public sealed class Close : EuiMessageBase
+    {
+    }
+
+    [Serializable, NetSerializable]
+    public sealed class Follow : EuiMessageBase
+    {
+        public EntityUid TargetFax { get; }
+
+        public Follow(EntityUid targetFax)
+        {
+            TargetFax = targetFax;
+        }
+    }
+
+    [Serializable, NetSerializable]
+    public sealed class Send : EuiMessageBase
+    {
+        public EntityUid Target { get; }
+        public string Title { get; }
+        public string From { get; }
+        public string Content { get; }
+        public string StampState { get; }
+
+        public Send(EntityUid target, string title, string from, string content, string stamp)
+        {
+            Target = target;
+            Title = title;
+            From = from;
+            Content = content;
+            StampState = stamp;
+        }
+    }
+}