Code cleanup: radio jammer (#29052)

* Code cleanup for radio jammer

* More Entity<T> for the people, and fix an accidental variable reuse

Content.Shared/DeviceNetwork/Systems/SharedDeviceNetworkJammerSystem.cs

@@ -0,0 +1,63 @@
+using Content.Shared.DeviceNetwork.Components;
+
+namespace Content.Shared.DeviceNetwork.Systems;
+
+/// <inheritdoc cref="DeviceNetworkJammerComponent"/>
+public abstract class SharedDeviceNetworkJammerSystem : EntitySystem
+{
+    /// <summary>
+    /// Sets the range of the jamming effect.
+    /// </summary>
+    public void SetRange(Entity<DeviceNetworkJammerComponent> ent, float value)
+    {
+        ent.Comp.Range = value;
+        Dirty(ent);
+    }
+
+    /// <inheritdoc cref="SetRange"/>
+    public bool TrySetRange(Entity<DeviceNetworkJammerComponent?> ent, float value)
+    {
+        if (!Resolve(ent, ref ent.Comp, logMissing: false))
+            return false;
+
+        SetRange((ent, ent.Comp), value);
+        return true;
+    }
+
+    /// <summary>
+    /// Returns the set of networks that this entity can jam.
+    public IReadOnlySet<string> GetJammableNetworks(Entity<DeviceNetworkJammerComponent> ent)
+    {
+        return ent.Comp.JammableNetworks;
+    }
+
+    /// <summary>
+    /// Enables this entity to jam packets on the specified network.
+    /// </summary>
+    public void AddJammableNetwork(Entity<DeviceNetworkJammerComponent> ent, string networkId)
+    {
+        if (ent.Comp.JammableNetworks.Add(networkId))
+            Dirty(ent);
+    }
+
+    /// <summary>
+    /// Stops this entity from jamming packets on the specified network.
+    /// </summary>
+    public void RemoveJammableNetwork(Entity<DeviceNetworkJammerComponent> ent, string networkId)
+    {
+        if (ent.Comp.JammableNetworks.Remove(networkId))
+            Dirty(ent);
+    }
+
+    /// <summary>
+    /// Stops this entity from jamming packets on any networks.
+    /// </summary>
+    public void ClearJammableNetworks(Entity<DeviceNetworkJammerComponent> ent)
+    {
+        if (ent.Comp.JammableNetworks.Count == 0)
+            return;
+
+        ent.Comp.JammableNetworks.Clear();
+        Dirty(ent);
+    }
+}