Channel Cancel checks for Channeled AOE DPS Spells

Hello everyone,

I liked the channel cancel I did on mage recently, where they cancel blizzard if there is only 1 enemy left. I decided to do the same for the following classes:

Druid: Hurricane
Hunter: Volley
Priest: Mind Sear
Warlock: Rain of Fire

I moved the "ChannelCancel" action to it's own file, so other classes could benefit from it. I removed it from the mageactions.

src/strategy/druid/DruidTriggers.h

@@ -12,6 +12,8 @@
 #include "PlayerbotAI.h"
 #include "Playerbots.h"
 #include "SharedDefines.h"
+#include "Trigger.h"
+#include <set>
 
 class PlayerbotAI;
 
@@ -263,4 +265,19 @@ public:
     }
 };
 
+class HurricaneChannelCheckTrigger : public Trigger
+{
+public:
+    HurricaneChannelCheckTrigger(PlayerbotAI* botAI, uint32 minEnemies = 2)
+        : Trigger(botAI, "hurricane channel check"), minEnemies(minEnemies)
+    {
+    }
+
+    bool IsActive() override;
+
+protected:
+    uint32 minEnemies;
+    static const std::set<uint32> HURRICANE_SPELL_IDS;
+};
+
 #endif