From 1cbdb96a147a5805d767b4a18c9963a869abbe94 Mon Sep 17 00:00:00 2001
From: Vollmer <kristianvollmer@gmail.com>
Date: Mon, 25 Mar 2024 15:28:19 +0100
Subject: [PATCH] Implement Living Flames pre pull normalizer

---
 src/analysis/retail/evoker/shared/index.ts    |  1 +
 .../LivingFlamePrePullNormalizer.ts           | 83 +++++++++++++++++++
 2 files changed, 84 insertions(+)
 create mode 100644 src/analysis/retail/evoker/shared/modules/normalizers/LivingFlamePrePullNormalizer.ts

diff --git a/src/analysis/retail/evoker/shared/index.ts b/src/analysis/retail/evoker/shared/index.ts
index 57573b3937f..ce771ae9342 100644
--- a/src/analysis/retail/evoker/shared/index.ts
+++ b/src/analysis/retail/evoker/shared/index.ts
@@ -9,6 +9,7 @@ export {
   getWastedEssenceBurst,
 } from './modules/normalizers/LeapingFlamesNormalizer';
 export { default as LeapingFlames } from './modules/talents/LeapingFlames';
+export { default as LivingFlamePrePullNormalizer } from './modules/normalizers/LivingFlamePrePullNormalizer';
 export { default as SpellEssenceCost } from './modules/core/essence/SpellEssenceCost';
 export { default as EssenceTracker } from './modules/core/essence/EssenceTracker';
 export { default as EssenceGraph } from './modules/core/essence/EssenceGraph';
diff --git a/src/analysis/retail/evoker/shared/modules/normalizers/LivingFlamePrePullNormalizer.ts b/src/analysis/retail/evoker/shared/modules/normalizers/LivingFlamePrePullNormalizer.ts
new file mode 100644
index 00000000000..8288b1941e7
--- /dev/null
+++ b/src/analysis/retail/evoker/shared/modules/normalizers/LivingFlamePrePullNormalizer.ts
@@ -0,0 +1,83 @@
+import SPELLS from 'common/SPELLS/evoker';
+import { AnyEvent, BeginCastEvent, EventType } from 'parser/core/Events';
+import EventsNormalizer from 'parser/core/EventsNormalizer';
+import Haste from 'parser/shared/modules/Haste';
+import { isRealCast } from 'parser/shared/normalizers/Channeling';
+
+/**
+ * Living flame is a very common pre-pull cast
+ * however it often occurs that you'll start channeling it pre-pull and only
+ * the cast success event (PrePullNormalizer doesn't account for this since we don't have a way to define instant cast spells)
+ * will trigger, this messes with how we handle GCDs and makes for a messy timeline.
+ *
+ * This normalizer aims to correct those situation */
+class LivingFlamePrePullNormalizer extends EventsNormalizer {
+  static dependencies = {
+    ...EventsNormalizer.dependencies,
+    haste: Haste,
+  };
+  protected haste!: Haste;
+  normalize(events: AnyEvent[]) {
+    const fixedEvents: AnyEvent[] = [];
+    let foundBegin = false;
+
+    events.forEach((event) => {
+      if (foundBegin) {
+        fixedEvents.push(event);
+        return;
+      }
+
+      if (
+        (event.type === EventType.BeginCast ||
+          event.type === EventType.EmpowerStart ||
+          event.type === EventType.EmpowerEnd ||
+          (event.type === EventType.Cast && isRealCast(event))) &&
+        event.sourceID === this.owner.selectedCombatant.id
+      ) {
+        // First cast found is not living flame or it was a beginCast living flame
+        if (event.type !== EventType.Cast || event.ability.guid !== SPELLS.LIVING_FLAME_CAST.id) {
+          foundBegin = true;
+          fixedEvents.push(event);
+          return;
+        }
+
+        // Start the pre-pull normalizing
+        const startTime = event.timestamp - 1500 / (1 + this.haste.current);
+
+        const beginCastEvent: BeginCastEvent = {
+          ability: event.ability,
+          type: EventType.BeginCast,
+          timestamp: startTime,
+          castEvent: event,
+          channel: {
+            type: EventType.BeginChannel,
+            timestamp: startTime,
+            ability: event.ability,
+            sourceID: event.sourceID,
+            isCancelled: false,
+          },
+          isCancelled: false,
+          sourceID: event.sourceID,
+          sourceIsFriendly: event.sourceIsFriendly,
+          target: event.target ?? {
+            name: 'Environment',
+            id: -1,
+            guid: 0,
+            type: 'NPC',
+            icon: 'NPC',
+          },
+          targetIsFriendly: event.targetIsFriendly,
+          __fabricated: true,
+          prepull: true,
+        };
+        fixedEvents.push(beginCastEvent);
+        fixedEvents.push(event);
+        return;
+      }
+
+      fixedEvents.push(event);
+    });
+    return fixedEvents;
+  }
+}
+export default LivingFlamePrePullNormalizer;