Core/Spells: implement reputation requirements for spells (mostly used in guild spells such as Guild Page)

src/server/game/Spells/Spell.cpp

@@ -5916,6 +5916,11 @@ SpellCastResult Spell::CheckCast(bool strict, uint32* param1 /*= nullptr*/, uint
             return SPELL_FAILED_REQUIRES_SPELL_FOCUS;
     }
 
+    // check reputation
+    if (m_spellInfo->MinFactionId && m_spellInfo->MinReputation && m_caster->IsPlayer())
+        if (m_caster->ToPlayer()->GetReputationRank(m_spellInfo->MinFactionId) < static_cast<ReputationRank>(m_spellInfo->MinReputation))
+            return SPELL_FAILED_REPUTATION;
+
     SpellCastResult castResult = SPELL_CAST_OK;
 
     // always (except passive spells) check items (only player related checks)

src/server/game/Spells/SpellInfo.cpp

@@ -967,6 +967,8 @@ SpellInfo::SpellInfo(SpellEntry const* spellEntry, SpellEffectEntry const** effe
     SpellCastingRequirementsEntry const* _castreq = GetSpellCastingRequirements();
     RequiresSpellFocus = _castreq ? _castreq->RequiresSpellFocus : 0;
     FacingCasterFlags = _castreq ? SpellFacingCasterFlags(_castreq->FacingCasterFlags) : SpellFacingCasterFlags::None;
+    MinFactionId = _castreq ? _castreq->MinFactionID : 0;
+    MinReputation = _castreq ? _castreq->MinReputation : 0;
     AreaGroupId = _castreq ? _castreq->RequiredAreasID : -1;
 
     // SpellCategoriesEntry

src/server/game/Spells/SpellInfo.h

@@ -415,6 +415,8 @@ class TC_GAME_API SpellInfo
         flag96 SpellFamilyFlags;
         uint32 DmgClass;
         uint32 PreventionType;
+        uint32 MinFactionId;
+        uint32 MinReputation;
         int32  AreaGroupId;
         uint32 SchoolMask;
         uint32 SpellDifficultyId;