Admin announcement panel. (#4803)

Content.Shared/Administration/AdminAnnounceEuiState.cs

@@ -0,0 +1,32 @@
+using System;
+using Content.Shared.Eui;
+using Robust.Shared.Serialization;
+
+namespace Content.Shared.Administration
+{
+    public enum AdminAnnounceType
+    {
+        Station,
+        Server,
+    }
+    [Serializable, NetSerializable]
+    public sealed class AdminAnnounceEuiState : EuiStateBase {}
+
+    public static class AdminAnnounceEuiMsg
+    {
+        [Serializable, NetSerializable]
+        public sealed class Close : EuiMessageBase
+        {
+
+        }
+
+        [Serializable, NetSerializable]
+        public sealed class DoAnnounce : EuiMessageBase
+        {
+            public bool CloseAfter;
+            public string Announcer = default!;
+            public string Announcement = default!;
+            public AdminAnnounceType AnnounceType;
+        }
+    }
+}