[WIP] Scourge invasion Event Rework

[Oroxzy]

Reason

Extreme adjustments to behave exactly like the original (even better because our city attacks are not bugged...) and move everything into the database if possible.

Quick explanation

This is how the event works now with these changes:

GameEvent 17 adds all Quest NPCs and GameObjects for Cities and Light's Hope Chapel to the Map.
It also spawns the City attack NPCs and Bosses in Dungeons.

    GAME_EVENT_SCOURGE_INVASION                         = 17,

It also summons the NPC "Mouth of Kel'thuzad" in every invasion Zone.
This NPC controls and handles the attacked zones. He contains the only Hardcoded Script beside some Gossips and Qest stuff.
Each Invasion Zone has a seperated GameEvent:

    GAME_EVENT_SCOURGE_INVASION_WINTERSPRING            = 90,
    GAME_EVENT_SCOURGE_INVASION_TANARIS                 = 91,
    GAME_EVENT_SCOURGE_INVASION_AZSHARA                 = 92,
    GAME_EVENT_SCOURGE_INVASION_BLASTED_LANDS           = 93,
    GAME_EVENT_SCOURGE_INVASION_EASTERN_PLAGUELANDS     = 94,
    GAME_EVENT_SCOURGE_INVASION_BURNING_STEPPES         = 95,

Every event spawns the NPCs and GameObjects in it's zone.

If all Necropolises in the Zone are destroyed, the Mouth of Kel'thuzad NPC stops the Game Event at his defeated zone and has a configurable timer to start it again at some point.

TODO

• Fix issue with Spawn Spell 28234, which makes npcs immune to damage somehow.

• Removed almost all of the horrible Hardcoded stuff and moving things to DB.

• City attacks and Flameshocker random spawns like it should be.

• Much more accurate invasion camp spawn mechanics.
  https://www.youtube.com/watch?v=tkrFymyC9v4&feature=youtu.be

• Corrected many spell timers.

• Respawn Low level minions outside cities with correct groups and respawn timers.

• Make zone invasion timers and max attackable zones configurable.

• Pooling invasion camps skullpiles.
  

• Solve Spawn Mechanism.

How can i solve this?

• Necrotic Shard is casting spell 27885 every 5 seconds.
• This spell should activate the 3 nearest invisible GameObjects (181111,181155,181156)
• Activating the object has the consequence that the further process is activated so that a scourge minion is spawned in the place of the object, which has nothing to do with solving this problem here.
• Activating the Gameobject also despawns and respawns it after xxx seconds.
• The Issue is: The Code in Spell.cpp Line 2642 to 2649 does not ignore despawned Objects. It always take the 3 nearsest Objects and doesn't ignore the despawned ones, this means that only 3 minions will spawn around the necrotic shard.
• If i add if (iter->isSpawned()) it works but it may break several other scripts, which should target non-spawned objects.

https://github.com/vmangos/core/blob/b8616cbfb212d52f70b79593ea1ce8c8fbce51dd/src/game/Spells/Spell.cpp#L2642C1-L2649C14

Im dumb please help! :p

[Kittnz]

@Oroxzy what are the minor stuff to fix?

[Oroxzy]

@Oroxzy what are the minor stuff to fix?

I mentioned it in more detail above, under the TODO list

[ratkosrb]

Why editing these spells? No comment provided in the insert.