Separate "thank you" messages from general ads

Content.Client/Entry/EntryPoint.cs

@@ -107,6 +107,7 @@ public override void Init()
             _prototypeManager.RegisterIgnore("gameMapPool");
             _prototypeManager.RegisterIgnore("npcFaction");
             _prototypeManager.RegisterIgnore("lobbyBackground");
+            _prototypeManager.RegisterIgnore("messagePack");
             _prototypeManager.RegisterIgnore("advertisementsPack");
             _prototypeManager.RegisterIgnore("gamePreset");
             _prototypeManager.RegisterIgnore("noiseChannel");

Content.Server/Advertise/AdvertisementsPackPrototype.cs

@@ -0,0 +1,10 @@
+using Robust.Shared.Prototypes;
+
+namespace Content.Server.Advertise;
+
+[Serializable, Prototype("advertisementsPack")]
+public sealed partial class AdvertisementsPackPrototype : MessagePackPrototype
+{
+    [Obsolete("Convert to MessagePack")]
+    public List<string> Advertisements => Messages;
+}

Content.Server/Advertise/Components/AdvertiseComponent.cs

@@ -0,0 +1,39 @@
+using Content.Server.Advertise.EntitySystems;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype;
+
+namespace Content.Server.Advertise.Components;
+
+[RegisterComponent, Access(typeof(AdvertiseSystem))]
+public sealed partial class AdvertiseComponent : Component
+{
+    /// <summary>
+    ///     Minimum time in seconds to wait before saying a new ad, in seconds. Has to be larger than or equal to 1.
+    /// </summary>
+    [DataField("minWait")]
+    public int MinimumWait { get; private set; } = 8 * 60;
+
+    /// <summary>
+    ///     Maximum time in seconds to wait before saying a new ad, in seconds. Has to be larger than or equal
+    ///     to <see cref="MinimumWait"/>
+    /// </summary>
+    [DataField("maxWait")]
+    public int MaximumWait { get; private set; } = 10 * 60;
+
+    /// <summary>
+    ///     The identifier for the advertisements pack prototype.
+    /// </summary>
+    [DataField("pack", customTypeSerializer: typeof(PrototypeIdSerializer<MessagePackPrototype>), required: true)]
+    public string PackPrototypeId { get; private set; } = string.Empty;
+
+    /// <summary>
+    ///     The next time an advertisement will be said.
+    /// </summary>
+    [ViewVariables(VVAccess.ReadWrite)]
+    public TimeSpan NextAdvertisementTime { get; set; } = TimeSpan.Zero;
+
+    /// <summary>
+    ///     Whether the entity will say advertisements or not.
+    /// </summary>
+    [ViewVariables(VVAccess.ReadWrite)]
+    public bool Enabled { get; set; } = true;
+}

Content.Server/Advertise/Components/SpeakOnUIClosedComponent.cs

@@ -0,0 +1,35 @@
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype;
+
+namespace Content.Server.Advertise.Components;
+
+/// <summary>
+/// Causes the entity to speak using the Chat system when its ActivatableUI is closed, optionally
+/// requiring that a Flag be set as well.
+/// </summary>
+[RegisterComponent, Access(typeof(SpeakOnUIClosedSystem))]
+public sealed partial class SpeakOnUIClosedComponent : Component
+{
+    /// <summary>
+    /// The identifier for the message pack prototype containing messages to be spoken by this entity.
+    /// </summary>
+    [DataField("pack", customTypeSerializer: typeof(PrototypeIdSerializer<MessagePackPrototype>), required: true)]
+    public string PackPrototypeId { get; private set; } = string.Empty;
+
+    /// <summary>
+    /// Is this component active? If false, no messages will be spoken.
+    /// </summary>
+    [DataField]
+    public bool Enabled = true;
+
+    /// <summary>
+    /// Should messages be spoken only if the <see cref="Flag"/> is set (true), or every time the UI is closed (false)?
+    /// </summary>
+    [DataField]
+    public bool RequireFlag = true;
+
+    /// <summary>
+    /// State variable only used if <see cref="RequireFlag"/> is true. Set with <see cref="SpeakOnUIClosedSystem.TrySetFlag"/>.
+    /// </summary>
+    [DataField]
+    public bool Flag;
+}