Core/Movement: Fix issues where creatures cancel spell casts chasing target and Implement SPELL_ATTR5_CAN_CHANNEL_WHEN_MOVING

(cherry picked from commit bf2cee8cce39e64590dc68bc35e5d3d2dd19cbaf)

2 files changed, 12 insertions, 0 deletions

diff --git a/src/server/game/Entities/Unit/Unit.cpp b/src/server/game/Entities/Unit/Unit.cpp
index 871b04c46f5..6f23f57b3c7 100644
--- a/src/server/game/Entities/Unit/Unit.cpp
+++ b/src/server/game/Entities/Unit/Unit.cpp
@@ -2983,6 +2983,15 @@ int32 Unit::GetCurrentSpellCastTime(uint32 spell_id) const
     return 0;
 }
 
+bool Unit::CanMoveDuringChannel() const
+{
+    if (Spell* spell = m_currentSpells[CURRENT_CHANNELED_SPELL])
+        if (spell->getState() != SPELL_STATE_FINISHED)
+            return spell->GetSpellInfo()->HasAttribute(SPELL_ATTR5_CAN_CHANNEL_WHEN_MOVING) && spell->IsChannelActive();
+
+    return false;
+}
+
 bool Unit::isInFrontInMap(Unit const* target, float distance,  float arc) const
 {
     return IsWithinDistInMap(target, distance) && HasInArc(arc, target);
diff --git a/src/server/game/Entities/Unit/Unit.h b/src/server/game/Entities/Unit/Unit.h
index 6e16f94422c..26bf7a56751 100644
--- a/src/server/game/Entities/Unit/Unit.h
+++ b/src/server/game/Entities/Unit/Unit.h
@@ -1957,6 +1957,9 @@ class TC_GAME_API Unit : public WorldObject
         virtual SpellInfo const* GetCastSpellInfo(SpellInfo const* spellInfo) const;
         uint32 GetCastSpellXSpellVisualId(SpellInfo const* spellInfo) const;
 
+        // Check if our current channel spell has attribute SPELL_ATTR5_CAN_CHANNEL_WHEN_MOVING
+        bool CanMoveDuringChannel() const;
+
         SpellHistory* GetSpellHistory() { return _spellHistory; }
         SpellHistory const* GetSpellHistory() const { return _spellHistory; }