Station records (#8720)

Co-authored-by: metalgearsloth <comedian_vs_clown@hotmail.com>

Content.Shared/StationRecords/SharedGeneralStationRecordConsoleSystem.cs

@@ -0,0 +1,54 @@
+using Robust.Shared.Serialization;
+
+namespace Content.Shared.StationRecords;
+
+[Serializable, NetSerializable]
+public enum GeneralStationRecordConsoleKey : byte
+{
+    Key
+}
+
+/// <summary>
+///     General station records console state. There are a few states:
+///     - SelectedKey null, Record null, RecordListing null
+///         - The station record database could not be accessed.
+///     - SelectedKey null, Record null, RecordListing non-null
+///         - Records are populated in the database, or at least the station has
+///           the correct component.
+///     - SelectedKey non-null, Record null, RecordListing non-null
+///         - The selected key does not have a record tied to it.
+///     - SelectedKey non-null, Record non-null, RecordListing non-null
+///         - The selected key has a record tied to it, and the record has been sent.
+///
+///     Other states are erroneous.
+/// </summary>
+[Serializable, NetSerializable]
+public sealed class GeneralStationRecordConsoleState : BoundUserInterfaceState
+{
+    /// <summary>
+    ///     Current selected key.
+    /// </summary>
+    public StationRecordKey? SelectedKey { get; }
+    public GeneralStationRecord? Record { get; }
+    public Dictionary<StationRecordKey, string>? RecordListing { get; }
+
+    public GeneralStationRecordConsoleState(StationRecordKey? key, GeneralStationRecord? record, Dictionary<StationRecordKey, string>? recordListing)
+    {
+        SelectedKey = key;
+        Record = record;
+        RecordListing = recordListing;
+    }
+
+    public bool IsEmpty() => SelectedKey == null && Record == null && RecordListing == null;
+}
+
+[Serializable, NetSerializable]
+public sealed class SelectGeneralStationRecord : BoundUserInterfaceMessage
+{
+    public StationRecordKey? SelectedKey { get; }
+
+    public SelectGeneralStationRecord(StationRecordKey? selectedKey)
+    {
+        SelectedKey = selectedKey;
+    }
+}