Surveillance camera listening/speaking (#11640)

Content.Server/SurveillanceCamera/Components/SurveillanceCameraMicrophoneComponent.cs

@@ -0,0 +1,47 @@
+using Content.Server.Radio.Components;
+using Content.Shared.Interaction;
+using Content.Shared.Radio;
+using Content.Shared.Whitelist;
+
+namespace Content.Server.SurveillanceCamera;
+
+/// <summary>
+///     Component that allows surveillance cameras to listen to the local
+///     environment. All surveillance camera monitors have speakers for this.
+/// </summary>
+[RegisterComponent]
+[ComponentReference(typeof(IListen))]
+public sealed class SurveillanceCameraMicrophoneComponent : Component, IListen
+{
+    public bool Enabled { get; set; } = true;
+
+    /// <summary>
+    ///     Components that the microphone checks for to avoid transmitting
+    ///     messages from these entities over the surveillance camera.
+    ///     Used to avoid things like feedback loops, or radio spam.
+    /// </summary>
+    [DataField("blacklist")]
+    public EntityWhitelist BlacklistedComponents { get; } = new();
+
+    // TODO: Once IListen is removed, **REMOVE THIS**
+
+    private SurveillanceCameraMicrophoneSystem? _microphoneSystem;
+    protected override void Initialize()
+    {
+        base.Initialize();
+
+        _microphoneSystem = EntitySystem.Get<SurveillanceCameraMicrophoneSystem>();
+    }
+
+    public int ListenRange { get; } = 10;
+    public bool CanListen(string message, EntityUid source, RadioChannelPrototype? channelPrototype)
+    {
+        return _microphoneSystem != null
+            && _microphoneSystem.CanListen(Owner, source, this);
+    }
+
+    public void Listen(string message, EntityUid speaker, RadioChannelPrototype? channel)
+    {
+        _microphoneSystem?.RelayEntityMessage(Owner, speaker, message);
+    }
+}

Content.Server/SurveillanceCamera/Components/SurveillanceCameraSpeakerComponent.cs

@@ -0,0 +1,18 @@
+namespace Content.Server.SurveillanceCamera;
+
+/// <summary>
+///     This allows surveillance cameras to speak, if the camera in question
+///     has a microphone that listens to speech.
+/// </summary>
+[RegisterComponent]
+public sealed class SurveillanceCameraSpeakerComponent : Component
+{
+    // mostly copied from Speech
+    [DataField("speechEnabled")] public bool SpeechEnabled = true;
+
+    [ViewVariables] public float SpeechSoundCooldown = 0.5f;
+
+    [ViewVariables] public readonly Queue<string> LastSpokenNames = new();
+
+    public TimeSpan LastSoundPlayed = TimeSpan.Zero;
+}