Add extra couch features

Couch/scripting/include/Couch.inc

@@ -4,6 +4,16 @@
 
 #define _Couch_included
 
+// How a player moved the couch, passed to Couch_OnCouchInteraction.
+enum CouchMethod
+{
+	CouchMethod_Bullet,		// Gunfire; weapon is the gun, e.g. "ak47".
+	CouchMethod_Knife,		// weapon is "knife".
+	CouchMethod_Grenade,	// weapon is "hegrenade".
+	CouchMethod_Use,		// +use; weapon is empty.
+	CouchMethod_Other		// Any other damage credited to a player; weapon is the inflictor's classname.
+};
+
 // The core defines COUCH_CORE; it creates the forwards and natives itself.
 #if !defined COUCH_CORE
 
@@ -30,7 +40,18 @@ forward void Couch_OnCouchRemoved();
 forward void Couch_OnCouchDamaged(int couch, int attacker, float damage);
 
 /**
- * Called when a hit from a blocked client is refused. Fires per pellet, so rate-limit anything you send.
+ * Called for every hit or +use the couch accepts from a player, saying how it was moved. Hits
+ * fire alongside Couch_OnCouchDamaged, so shotguns report once per pellet.
+ *
+ * @param couch             Entity index of the couch.
+ * @param client            Client index of the player.
+ * @param method            How the couch was moved.
+ * @param weapon            Weapon without its "weapon_" prefix, see CouchMethod.
+ */
+forward void Couch_OnCouchInteraction(int couch, int client, CouchMethod method, const char[] weapon);
+
+/**
+ * Called when a hit or +use from a blocked client is refused. Fires per pellet, so rate-limit anything you send.
  *
  * @param couch             Entity index of the couch.
  * @param client            Client index of the blocked player.
@@ -103,6 +124,16 @@ native bool Couch_IsPistolOnly();
  */
 native void Couch_SetPistolOnly(bool enabled);
 
+/**
+ * Whether players may +use the couch to pick it up. Mirrors sm_allow_couch_use.
+ */
+native bool Couch_IsUseAllowed();
+
+/**
+ * Allows or forbids picking the couch up with +use; when forbidden it can only be shot. Writes sm_allow_couch_use.
+ */
+native void Couch_SetUseAllowed(bool allowed);
+
 /**
  * Blocks or unblocks a client from the couch: their hits are refused and their body can't push
  * it. The flag is per slot and cleared on disconnect and map start; the caller owns persistence.
@@ -146,6 +177,8 @@ public SharedPlugin __pl_Couch =
 		MarkNativeAsOptional("Couch_SetEffectEnabled");
 		MarkNativeAsOptional("Couch_IsPistolOnly");
 		MarkNativeAsOptional("Couch_SetPistolOnly");
+		MarkNativeAsOptional("Couch_IsUseAllowed");
+		MarkNativeAsOptional("Couch_SetUseAllowed");
 		MarkNativeAsOptional("Couch_SetClientBlocked");
 		MarkNativeAsOptional("Couch_IsClientBlocked");
 	}