ninja 2 electric boogaloo (#15534)

Co-authored-by: deltanedas <@deltanedas:kde.org>

Content.Shared/Ninja/Components/BatteryDrainerComponent.cs

@@ -0,0 +1,38 @@
+using Content.Shared.Ninja.Systems;
+using Robust.Shared.Audio;
+
+namespace Content.Shared.Ninja.Components;
+
+/// <summary>
+/// Component for draining power from APCs/substations/SMESes, when ProviderUid is set to a battery cell.
+/// Does not rely on relay, simply being on the user and having BatteryUid set is enough.
+/// </summary>
+[RegisterComponent, Access(typeof(SharedBatteryDrainerSystem))]
+public sealed partial class BatteryDrainerComponent : Component
+{
+    /// <summary>
+    /// The powercell entity to drain power into.
+    /// Determines whether draining is possible.
+    /// </summary>
+    [DataField("batteryUid"), ViewVariables(VVAccess.ReadWrite)]
+    public EntityUid? BatteryUid;
+
+    /// <summary>
+    /// Conversion rate between joules in a device and joules added to battery.
+    /// Should be very low since powercells store nothing compared to even an APC.
+    /// </summary>
+    [DataField("drainEfficiency"), ViewVariables(VVAccess.ReadWrite)]
+    public float DrainEfficiency = 0.001f;
+
+    /// <summary>
+    /// Time that the do after takes to drain charge from a battery, in seconds
+    /// </summary>
+    [DataField("drainTime"), ViewVariables(VVAccess.ReadWrite)]
+    public float DrainTime = 1f;
+
+    /// <summary>
+    /// Sound played after the doafter ends.
+    /// </summary>
+    [DataField("sparkSound")]
+    public SoundSpecifier SparkSound = new SoundCollectionSpecifier("sparks");
+}