[QoL] Add Arena Info Flyout for Weather, Terrain, etc. (#1734)

* Initial Commit

* Add Time of Day Icons and Remove Fight UI Dependancy

* Rename to Match

* Update battle-scene.ts

* Add Settings

* Add Comments

src/battle-scene.ts

@@ -58,6 +58,7 @@ import {InputsController} from "./inputs-controller";
 import {UiInputs} from "./ui-inputs";
 import { MoneyFormat } from "./enums/money-format";
 import { NewArenaEvent } from "./battle-scene-events";
+import ArenaFlyout from "./ui/arena-flyout";
 
 export const bypassLogin = import.meta.env.VITE_BYPASS_LOGIN === "1";
 
@@ -92,6 +93,7 @@ export default class BattleScene extends SceneBase {
   public damageNumbersMode: integer = 0;
   public reroll: boolean = false;
   public showMovesetFlyout: boolean = true;
+  public showArenaFlyout: boolean = true;
   public showLevelUpStats: boolean = true;
   public enableTutorials: boolean = import.meta.env.VITE_BYPASS_TUTORIAL === "1";
   public enableRetries: boolean = false;
@@ -178,6 +180,8 @@ export default class BattleScene extends SceneBase {
   private luckText: Phaser.GameObjects.Text;
   private modifierBar: ModifierBar;
   private enemyModifierBar: ModifierBar;
+  public arenaFlyout: ArenaFlyout;
+
   private fieldOverlay: Phaser.GameObjects.Rectangle;
   private modifiers: PersistentModifier[];
   private enemyModifiers: PersistentModifier[];
@@ -411,6 +415,10 @@ export default class BattleScene extends SceneBase {
     this.luckLabelText.setVisible(false);
     this.fieldUI.add(this.luckLabelText);
 
+    this.arenaFlyout = new ArenaFlyout(this);
+    this.fieldUI.add(this.arenaFlyout);
+    this.fieldUI.moveBelow<Phaser.GameObjects.GameObject>(this.arenaFlyout, this.fieldOverlay);
+
     this.updateUIPositions();
 
     this.damageNumberHandler = new DamageNumberHandler();
@@ -1272,6 +1280,13 @@ export default class BattleScene extends SceneBase {
     return sprite;
   }
 
+  moveBelowOverlay<T extends Phaser.GameObjects.GameObject>(gameObject: T) {
+    this.fieldUI.moveBelow<any>(gameObject, this.fieldOverlay);
+  }
+  processInfoButton(pressed: boolean): void {
+    this.arenaFlyout.toggleFlyout(pressed);
+  }
+
   showFieldOverlay(duration: integer): Promise<void> {
     return new Promise(resolve => {
       this.tweens.add({

src/field/arena-events.ts

@@ -10,8 +10,10 @@ export enum ArenaEventType {
   /** Triggers when a {@linkcode TerrainType} is added, overlapped, or removed */
   TERRAIN_CHANGED = "onTerrainChanged",
 
-  /** Triggers when a {@linkcode ArenaTagType} is added or removed */
-  TAG_CHANGED = "onTagChanged",
+  /** Triggers when a {@linkcode ArenaTagType} is added */
+  TAG_ADDED = "onTagAdded",
+  /** Triggers when a {@linkcode ArenaTagType} is removed */
+  TAG_REMOVED = "onTagRemoved",
 }
 
 /**
@@ -59,17 +61,34 @@ export class TerrainChangedEvent extends ArenaEvent {
     this.newTerrainType = newTerrainType;
   }
 }
+
 /**
- * Container class for {@linkcode ArenaEventType.TAG_CHANGED} events
+ * Container class for {@linkcode ArenaEventType.TAG_ADDED} events
  * @extends ArenaEvent
 */
-export class TagChangedEvent extends ArenaEvent {
-  /** The {@linkcode ArenaTagType} being set */
+export class TagAddedEvent extends ArenaEvent {
+  /** The {@linkcode ArenaTagType} being added */
   public arenaTagType: ArenaTagType;
   /** The {@linkcode ArenaTagSide} the tag is being placed on */
   public arenaTagSide: ArenaTagSide;
   constructor(arenaTagType: ArenaTagType, arenaTagSide: ArenaTagSide, duration: number) {
-    super(ArenaEventType.TAG_CHANGED, duration);
+    super(ArenaEventType.TAG_ADDED, duration);
+
+    this.arenaTagType = arenaTagType;
+    this.arenaTagSide = arenaTagSide;
+  }
+}
+/**
+ * Container class for {@linkcode ArenaEventType.TAG_REMOVED} events
+ * @extends ArenaEvent
+*/
+export class TagRemovedEvent extends ArenaEvent {
+  /** The {@linkcode ArenaTagType} being removed */
+  public arenaTagType: ArenaTagType;
+  /** The {@linkcode ArenaTagSide} the tag was being placed on */
+  public arenaTagSide: ArenaTagSide;
+  constructor(arenaTagType: ArenaTagType, arenaTagSide: ArenaTagSide, duration: number) {
+    super(ArenaEventType.TAG_REMOVED, duration);
 
     this.arenaTagType = arenaTagType;
     this.arenaTagSide = arenaTagSide;

src/field/arena.ts

@@ -19,7 +19,7 @@ import { Terrain, TerrainType } from "../data/terrain";
 import { PostTerrainChangeAbAttr, PostWeatherChangeAbAttr, applyPostTerrainChangeAbAttrs, applyPostWeatherChangeAbAttrs } from "../data/ability";
 import Pokemon from "./pokemon";
 import * as Overrides from "../overrides";
-import { WeatherChangedEvent, TerrainChangedEvent, TagChangedEvent } from "./arena-events";
+import { WeatherChangedEvent, TerrainChangedEvent, TagAddedEvent, TagRemovedEvent } from "./arena-events";
 
 export class Arena {
   public scene: BattleScene;
@@ -550,7 +550,7 @@ export class Arena {
     this.tags.push(newTag);
     newTag.onAdd(this);
 
-    this.eventTarget.dispatchEvent(new TagChangedEvent(newTag.tagType, newTag.side, newTag.turnCount));
+    this.eventTarget.dispatchEvent(new TagAddedEvent(newTag.tagType, newTag.side, newTag.turnCount));
 
     return true;
   }
@@ -577,6 +577,8 @@ export class Arena {
     this.tags.filter(t => !(t.lapse(this))).forEach(t => {
       t.onRemove(this);
       this.tags.splice(this.tags.indexOf(t), 1);
+
+      this.eventTarget.dispatchEvent(new TagRemovedEvent(t.tagType, t.side, t.turnCount));
     });
   }
 
@@ -586,6 +588,8 @@ export class Arena {
     if (tag) {
       tag.onRemove(this);
       tags.splice(tags.indexOf(tag), 1);
+
+      this.eventTarget.dispatchEvent(new TagRemovedEvent(tag.tagType, tag.side, tag.turnCount));
     }
     return !!tag;
   }
@@ -595,6 +599,8 @@ export class Arena {
     if (tag) {
       tag.onRemove(this);
       this.tags.splice(this.tags.indexOf(tag), 1);
+
+      this.eventTarget.dispatchEvent(new TagRemovedEvent(tag.tagType, tag.side, tag.turnCount));
     }
     return !!tag;
   }
@@ -603,6 +609,8 @@ export class Arena {
   removeAllTags(): void {
     while (this.tags.length) {
       this.tags[0].onRemove(this);
+      this.eventTarget.dispatchEvent(new TagRemovedEvent(this.tags[0].tagType, this.tags[0].side, this.tags[0].turnCount));
+
       this.tags.splice(0, 1);
     }
   }

src/loading-scene.ts

@@ -95,6 +95,11 @@ export class LoadingScene extends SceneBase {
     this.loadImage("type_tera", "ui");
     this.loadAtlas("type_bgs", "ui");
 
+    this.loadImage("dawn_icon", "ui");
+    this.loadImage("day_icon", "ui");
+    this.loadImage("dusk_icon", "ui");
+    this.loadImage("night_icon", "ui");
+
     this.loadImage("pb_tray_overlay_player", "ui");
     this.loadImage("pb_tray_overlay_enemy", "ui");
     this.loadAtlas("pb_tray_ball", "ui");

src/system/settings/settings.ts

@@ -52,6 +52,7 @@ export const SettingKeys = {
   Sprite_Set: "SPRITE_SET",
   Move_Animations: "MOVE_ANIMATIONS",
   Show_Moveset_Flyout: "SHOW_MOVESET_FLYOUT",
+  Show_Arena_Flyout: "SHOW_ARENA_FLYOUT",
   Show_Stats_on_Level_Up: "SHOW_LEVEL_UP_STATS",
   EXP_Gains_Speed: "EXP_GAINS_SPEED",
   EXP_Party_Display: "EXP_PARTY_DISPLAY",
@@ -189,6 +190,13 @@ export const Setting: Array<Setting> = [
     default: 1,
     type: SettingType.ACCESSIBILITY
   },
+  {
+    key: SettingKeys.Show_Arena_Flyout,
+    label: "Show Battle Effects Flyout",
+    options: OFF_ON,
+    default: 1,
+    type: SettingType.ACCESSIBILITY
+  },
   {
     key: SettingKeys.Show_Stats_on_Level_Up,
     label: "Show Stats on Level Up",
@@ -343,6 +351,9 @@ export function setSetting(scene: BattleScene, setting: string, value: integer):
   case SettingKeys.Show_Moveset_Flyout:
     scene.showMovesetFlyout = Setting[index].options[value] === "On";
     break;
+  case SettingKeys.Show_Arena_Flyout:
+    scene.showArenaFlyout = Setting[index].options[value] === "On";
+    break;
   case SettingKeys.Show_Stats_on_Level_Up:
     scene.showLevelUpStats = Setting[index].options[value] === "On";
     break;

src/ui-inputs.ts

@@ -119,15 +119,17 @@ export class UiInputs {
     }
   }
   buttonInfo(pressed: boolean = true): void {
-    if (!this.scene.showMovesetFlyout) {
-      return;
-    }
-
+    if (this.scene.showMovesetFlyout ) {
       for (const p of this.scene.getField().filter(p => p?.isActive(true))) {
         p.toggleFlyout(pressed);
       }
     }
 
+    if (this.scene.showArenaFlyout) {
+      this.scene.ui.processInfoButton(pressed);
+    }
+  }
+
   buttonMenu(): void {
     if (this.scene.disableMenu) {
       return;

src/ui/arena-flyout.ts

@@ -0,0 +1,384 @@
+import * as Utils from "../utils";
+import { addTextObject, TextStyle } from "./text";
+import BattleScene from "#app/battle-scene.js";
+import { ArenaTagSide } from "#app/data/arena-tag.js";
+import { WeatherType } from "#app/data/weather.js";
+import { TerrainType } from "#app/data/terrain.js";
+import { addWindow, WindowVariant } from "./ui-theme";
+import { ArenaEvent, ArenaEventType, TagAddedEvent, TagRemovedEvent, TerrainChangedEvent, WeatherChangedEvent } from "#app/field/arena-events.js";
+import { BattleSceneEventType, TurnEndEvent } from "#app/battle-scene-events.js";
+import { ArenaTagType } from "#app/data/enums/arena-tag-type.js";
+import { TimeOfDay } from "#app/data/enums/time-of-day.js";
+
+/** Enum used to differentiate {@linkcode Arena} effects */
+enum ArenaEffectType {
+  PLAYER,
+  WEATHER,
+  TERRAIN,
+  FIELD,
+  ENEMY,
+}
+/** Container for info about an {@linkcode Arena}'s effects */
+interface ArenaEffectInfo {
+  /** The enum string representation of the effect */
+  name: string;
+  /** {@linkcode ArenaEffectType} type of effect */
+  type: ArenaEffectType,
+
+  /** The maximum duration set by the effect */
+  maxDuration: number;
+  /** The current duration left on the effect */
+  duration: number;
+}
+
+export default class ArenaFlyout extends Phaser.GameObjects.Container {
+  /** An alias for the scene typecast to a {@linkcode BattleScene} */
+  private battleScene: BattleScene;
+
+  /** The restricted width of the flyout which should be drawn to */
+  private flyoutWidth = 170;
+  /** The restricted height of the flyout which should be drawn to */
+  private flyoutHeight = 51;
+
+  /** The amount of translation animation on the x-axis */
+  private translationX: number;
+  /** The x-axis point where the flyout should sit when activated */
+  private anchorX: number;
+  /** The y-axis point where the flyout should sit when activated */
+  private anchorY: number;
+
+  /** The initial container which defines where the flyout should be attached */
+  private flyoutParent: Phaser.GameObjects.Container;
+  /** The container which defines the drawable dimensions of the flyout */
+  private flyoutContainer: Phaser.GameObjects.Container;
+
+  /** The background {@linkcode Phaser.GameObjects.NineSlice} window for the flyout */
+  private flyoutWindow: Phaser.GameObjects.NineSlice;
+
+  /** The header {@linkcode Phaser.GameObjects.NineSlice} window for the flyout */
+  private flyoutWindowHeader: Phaser.GameObjects.NineSlice;
+  /** The {@linkcode Phaser.GameObjects.Text} that goes inside of the header */
+  private flyoutTextHeader: Phaser.GameObjects.Text;
+
+  /** The {@linkcode Phaser.GameObjects.Sprite} that represents the current time of day */
+  private timeOfDayIcon: Phaser.GameObjects.Sprite;
+
+  /** The {@linkcode Phaser.GameObjects.Text} header used to indicate the player's effects */
+  private flyoutTextHeaderPlayer: Phaser.GameObjects.Text;
+  /** The {@linkcode Phaser.GameObjects.Text} header used to indicate the enemy's effects */
+  private flyoutTextHeaderEnemy: Phaser.GameObjects.Text;
+  /** The {@linkcode Phaser.GameObjects.Text} header used to indicate neutral effects */
+  private flyoutTextHeaderField: Phaser.GameObjects.Text;
+
+  /** The {@linkcode Phaser.GameObjects.Text} used to indicate the player's effects */
+  private flyoutTextPlayer: Phaser.GameObjects.Text;
+  /** The {@linkcode Phaser.GameObjects.Text} used to indicate the enemy's effects */
+  private flyoutTextEnemy: Phaser.GameObjects.Text;
+  /** The {@linkcode Phaser.GameObjects.Text} used to indicate neutral effects */
+  private flyoutTextField: Phaser.GameObjects.Text;
+
+  /** Container for all field effects observed by this object */
+  private readonly fieldEffectInfo: ArenaEffectInfo[] = [];
+
+  // Stores callbacks in a variable so they can be unsubscribed from when destroyed
+  private onNewArenaEvent =  (event: Event) => this.onNewArena(event);
+  private onTurnInitEvent =  (event: Event) => this.onTurnInit(event);
+  private onTurnEndEvent =   (event: Event) => this.onTurnEnd(event);
+
+  private onFieldEffectChangedEvent = (event: Event) => this.onFieldEffectChanged(event);
+
+  constructor(scene: Phaser.Scene) {
+    super(scene, 0, 0);
+    this.battleScene = this.scene as BattleScene;
+
+    this.translationX = this.flyoutWidth;
+    this.anchorX = 0;
+    this.anchorY = -98;
+
+    this.flyoutParent = this.scene.add.container(this.anchorX - this.translationX, this.anchorY);
+    this.flyoutParent.setAlpha(0);
+    this.add(this.flyoutParent);
+
+    this.flyoutContainer = this.scene.add.container(0, 0);
+    this.flyoutParent.add(this.flyoutContainer);
+
+    this.flyoutWindow = addWindow(this.scene as BattleScene, 0, 0, this.flyoutWidth, this.flyoutHeight, false, false, 0, 0, WindowVariant.THIN);
+    this.flyoutContainer.add(this.flyoutWindow);
+
+    this.flyoutWindowHeader = addWindow(this.scene as BattleScene, this.flyoutWidth / 2, 0, this.flyoutWidth / 2, 14, false, false, 0, 0, WindowVariant.XTHIN);
+    this.flyoutWindowHeader.setOrigin();
+
+    this.flyoutContainer.add(this.flyoutWindowHeader);
+
+    this.flyoutTextHeader = addTextObject(this.scene, this.flyoutWidth / 2, 0, "Active Battle Effects", TextStyle.BATTLE_INFO);
+    this.flyoutTextHeader.setFontSize(54);
+    this.flyoutTextHeader.setAlign("center");
+    this.flyoutTextHeader.setOrigin();
+
+    this.flyoutContainer.add(this.flyoutTextHeader);
+
+    this.timeOfDayIcon = this.scene.add.sprite((this.flyoutWidth / 2) + (this.flyoutWindowHeader.displayWidth / 2), 0, "dawn_icon").setOrigin();
+    this.timeOfDayIcon.setVisible(false);
+
+    this.flyoutContainer.add(this.timeOfDayIcon);
+
+    this.flyoutTextHeaderPlayer = addTextObject(this.scene, 6, 5, "Player", TextStyle.SUMMARY_BLUE);
+    this.flyoutTextHeaderPlayer.setFontSize(54);
+    this.flyoutTextHeaderPlayer.setAlign("left");
+    this.flyoutTextHeaderPlayer.setOrigin(0, 0);
+
+    this.flyoutContainer.add(this.flyoutTextHeaderPlayer);
+
+    this.flyoutTextHeaderField = addTextObject(this.scene, this.flyoutWidth / 2, 5, "Neutral", TextStyle.SUMMARY_GREEN);
+    this.flyoutTextHeaderField.setFontSize(54);
+    this.flyoutTextHeaderField.setAlign("center");
+    this.flyoutTextHeaderField.setOrigin(0.5, 0);
+
+    this.flyoutContainer.add(this.flyoutTextHeaderField);
+
+    this.flyoutTextHeaderEnemy = addTextObject(this.scene, this.flyoutWidth - 6, 5, "Enemy", TextStyle.SUMMARY_RED);
+    this.flyoutTextHeaderEnemy.setFontSize(54);
+    this.flyoutTextHeaderEnemy.setAlign("right");
+    this.flyoutTextHeaderEnemy.setOrigin(1, 0);
+
+    this.flyoutContainer.add(this.flyoutTextHeaderEnemy);
+
+    this.flyoutTextPlayer = addTextObject(this.scene, 6, 13, "", TextStyle.BATTLE_INFO);
+    this.flyoutTextPlayer.setLineSpacing(-1);
+    this.flyoutTextPlayer.setFontSize(48);
+    this.flyoutTextPlayer.setAlign("left");
+    this.flyoutTextPlayer.setOrigin(0, 0);
+
+    this.flyoutContainer.add(this.flyoutTextPlayer);
+
+    this.flyoutTextField = addTextObject(this.scene, this.flyoutWidth / 2, 13, "", TextStyle.BATTLE_INFO);
+    this.flyoutTextField.setLineSpacing(-1);
+    this.flyoutTextField.setFontSize(48);
+    this.flyoutTextField.setAlign("center");
+    this.flyoutTextField.setOrigin(0.5, 0);
+
+    this.flyoutContainer.add(this.flyoutTextField);
+
+    this.flyoutTextEnemy = addTextObject(this.scene, this.flyoutWidth - 6, 13, "", TextStyle.BATTLE_INFO);
+    this.flyoutTextEnemy.setLineSpacing(-1);
+    this.flyoutTextEnemy.setFontSize(48);
+    this.flyoutTextEnemy.setAlign("right");
+    this.flyoutTextEnemy.setOrigin(1, 0);
+
+    this.flyoutContainer.add(this.flyoutTextEnemy);
+
+    this.name = "Fight Flyout";
+    this.flyoutParent.name = "Fight Flyout Parent";
+
+    // Subscribes to required events available on game start
+    this.battleScene.eventTarget.addEventListener(BattleSceneEventType.NEW_ARENA, this.onNewArenaEvent);
+    this.battleScene.eventTarget.addEventListener(BattleSceneEventType.TURN_INIT, this.onTurnInitEvent);
+    this.battleScene.eventTarget.addEventListener(BattleSceneEventType.TURN_END,  this.onTurnEndEvent);
+  }
+
+  private setTimeOfDayIcon() {
+    this.timeOfDayIcon.setTexture(TimeOfDay[this.battleScene.arena.getTimeOfDay()].toLowerCase() + "_icon");
+  }
+
+  private onTurnInit(event: Event) {
+    this.setTimeOfDayIcon();
+  }
+
+  private onNewArena(event: Event) {
+    this.fieldEffectInfo.length = 0;
+
+    // Subscribes to required events available on battle start
+    this.battleScene.arena.eventTarget.addEventListener(ArenaEventType.WEATHER_CHANGED, this.onFieldEffectChangedEvent);
+    this.battleScene.arena.eventTarget.addEventListener(ArenaEventType.TERRAIN_CHANGED, this.onFieldEffectChangedEvent);
+    this.battleScene.arena.eventTarget.addEventListener(ArenaEventType.TAG_ADDED,       this.onFieldEffectChangedEvent);
+    this.battleScene.arena.eventTarget.addEventListener(ArenaEventType.TAG_REMOVED,     this.onFieldEffectChangedEvent);
+
+    this.setTimeOfDayIcon();
+  }
+
+  /**
+   * Formats a string to title case
+   * @param unformattedText Text to be formatted
+   * @returns the formatted string
+   */
+  private formatText(unformattedText: string): string {
+    const text = unformattedText.split("_");
+    for (let i = 0; i < text.length; i++) {
+      text[i] = text[i].charAt(0).toUpperCase() + text[i].substring(1).toLowerCase();
+    }
+
+    return text.join(" ");
+  }
+
+  /** Clears out the current string stored in all arena effect texts */
+  private clearText() {
+    this.flyoutTextPlayer.text = "";
+    this.flyoutTextField.text = "";
+    this.flyoutTextEnemy.text = "";
+  }
+
+  /** Parses through all set Arena Effects and puts them into the proper {@linkcode Phaser.GameObjects.Text} object */
+  private updateFieldText() {
+    this.clearText();
+
+    this.fieldEffectInfo.sort((infoA, infoB) => infoA.duration - infoB.duration);
+
+    for (let i = 0; i < this.fieldEffectInfo.length; i++) {
+      const fieldEffectInfo = this.fieldEffectInfo[i];
+
+      // Creates a proxy object to decide which text object needs to be updated
+      let textObject: Phaser.GameObjects.Text;
+      switch (fieldEffectInfo.type) {
+      case ArenaEffectType.PLAYER:
+        textObject = this.flyoutTextPlayer;
+        break;
+
+      case ArenaEffectType.WEATHER:
+      case ArenaEffectType.TERRAIN:
+      case ArenaEffectType.FIELD:
+        textObject = this.flyoutTextField;
+
+        break;
+
+      case ArenaEffectType.ENEMY:
+        textObject = this.flyoutTextEnemy;
+        break;
+      }
+
+      textObject.text += this.formatText(fieldEffectInfo.name);
+      if (fieldEffectInfo.type === ArenaEffectType.TERRAIN) {
+        textObject.text += " Terrain"; // Adds 'Terrain' since the enum does not contain it
+      }
+
+      if (fieldEffectInfo.maxDuration !== 0) {
+        textObject.text += "  " + fieldEffectInfo.duration + "/" + fieldEffectInfo.maxDuration;
+      }
+
+      textObject.text += "\n";
+    }
+  }
+
+  /**
+   * Parses the {@linkcode Event} being passed and updates the state of the fieldEffectInfo array
+   * @param event {@linkcode Event} being sent
+   */
+  private onFieldEffectChanged(event: Event) {
+    const arenaEffectChangedEvent = event as ArenaEvent;
+    if (!arenaEffectChangedEvent) {
+      return;
+    }
+
+    let foundIndex: number;
+    switch (arenaEffectChangedEvent.constructor) {
+    case TagAddedEvent:
+      const tagAddedEvent = arenaEffectChangedEvent as TagAddedEvent;
+      this.fieldEffectInfo.push({
+        name: ArenaTagType[tagAddedEvent.arenaTagType],
+        type: tagAddedEvent.arenaTagSide === ArenaTagSide.BOTH
+          ? ArenaEffectType.FIELD
+          : tagAddedEvent.arenaTagSide === ArenaTagSide.PLAYER
+            ? ArenaEffectType.PLAYER
+            : ArenaEffectType.ENEMY,
+        maxDuration: tagAddedEvent.duration,
+        duration: tagAddedEvent.duration});
+      break;
+    case TagRemovedEvent:
+      const tagRemovedEvent = arenaEffectChangedEvent as TagRemovedEvent;
+      foundIndex = this.fieldEffectInfo.findIndex(info => info.name === ArenaTagType[tagRemovedEvent.arenaTagType]);
+      if (foundIndex !== -1) { // If the tag was being tracked, remove it
+        this.fieldEffectInfo.splice(foundIndex, 1);
+      }
+      break;
+
+    case WeatherChangedEvent:
+    case TerrainChangedEvent:
+      const fieldEffectChangedEvent = arenaEffectChangedEvent as WeatherChangedEvent | TerrainChangedEvent;
+
+      // Stores the old Weather/Terrain name in case it's in the array already
+      const oldName =
+      fieldEffectChangedEvent instanceof WeatherChangedEvent
+        ? WeatherType[fieldEffectChangedEvent.oldWeatherType]
+        : TerrainType[fieldEffectChangedEvent.oldTerrainType];
+      // Stores the new Weather/Terrain info
+      const newInfo = {
+        name:
+          fieldEffectChangedEvent instanceof WeatherChangedEvent
+            ? WeatherType[fieldEffectChangedEvent.newWeatherType]
+            : TerrainType[fieldEffectChangedEvent.newTerrainType],
+        type: fieldEffectChangedEvent instanceof WeatherChangedEvent
+          ? ArenaEffectType.WEATHER
+          : ArenaEffectType.TERRAIN,
+        maxDuration: fieldEffectChangedEvent.duration,
+        duration: fieldEffectChangedEvent.duration};
+
+      foundIndex = this.fieldEffectInfo.findIndex(info => [newInfo.name, oldName].includes(info.name));
+      if (foundIndex === -1) {
+        if (newInfo.name !== undefined) {
+          this.fieldEffectInfo.push(newInfo); // Adds the info to the array if it doesn't already exist and is defined
+        }
+      } else if (!newInfo.name) {
+        this.fieldEffectInfo.splice(foundIndex, 1); // Removes the old info if the new one is undefined
+      } else {
+        this.fieldEffectInfo[foundIndex] = newInfo; // Otherwise, replace the old info
+      }
+      break;
+    }
+
+    this.updateFieldText();
+  }
+
+  /**
+   * Iterates through the fieldEffectInfo array and decrements the duration of each item
+   * @param event {@linkcode Event} being sent
+   */
+  private onTurnEnd(event: Event) {
+    const turnEndEvent = event as TurnEndEvent;
+    if (!turnEndEvent) {
+      return;
+    }
+
+    const fieldEffectInfo: ArenaEffectInfo[] = [];
+    this.fieldEffectInfo.forEach(i => fieldEffectInfo.push(i));
+
+    for (let i = 0; i < fieldEffectInfo.length; i++) {
+      const info = fieldEffectInfo[i];
+
+      if (info.maxDuration === 0) {
+        continue;
+      }
+
+      --info.duration;
+      if (info.duration <= 0) { // Removes the item if the duration has expired
+        this.fieldEffectInfo.splice(this.fieldEffectInfo.indexOf(info), 1);
+      }
+    }
+
+    this.updateFieldText();
+  }
+
+  /**
+   * Animates the flyout to either show or hide it by applying a fade and translation
+   * @param visible Should the flyout be shown?
+   */
+  toggleFlyout(visible: boolean): void {
+    this.scene.tweens.add({
+      targets: this.flyoutParent,
+      x: visible ? this.anchorX : this.anchorX - this.translationX,
+      duration: Utils.fixedInt(125),
+      ease: "Sine.easeInOut",
+      alpha: visible ? 1 : 0,
+    });
+  }
+
+  destroy(fromScene?: boolean): void {
+    this.battleScene.eventTarget.removeEventListener(BattleSceneEventType.NEW_ARENA, this.onNewArenaEvent);
+    this.battleScene.eventTarget.removeEventListener(BattleSceneEventType.TURN_END,  this.onTurnEndEvent);
+
+    this.battleScene.arena.eventTarget.removeEventListener(ArenaEventType.WEATHER_CHANGED, this.onFieldEffectChangedEvent);
+    this.battleScene.arena.eventTarget.removeEventListener(ArenaEventType.TERRAIN_CHANGED, this.onFieldEffectChangedEvent);
+    this.battleScene.arena.eventTarget.removeEventListener(ArenaEventType.TAG_ADDED,       this.onFieldEffectChangedEvent);
+    this.battleScene.arena.eventTarget.removeEventListener(ArenaEventType.TAG_REMOVED,     this.onFieldEffectChangedEvent);
+
+    super.destroy();
+  }
+}

src/ui/ui.ts

@@ -222,6 +222,21 @@ export default class UI extends Phaser.GameObjects.Container {
     return this.handlers[Mode.MESSAGE] as BattleMessageUiHandler;
   }
 
+  processInfoButton(pressed: boolean) {
+    if (this.overlayActive) {
+      return false;
+    }
+
+    const battleScene = this.scene as BattleScene;
+    if ([Mode.CONFIRM, Mode.COMMAND, Mode.FIGHT, Mode.MESSAGE].includes(this.mode)) {
+      battleScene?.processInfoButton(pressed);
+      return true;
+    }
+
+    battleScene?.processInfoButton(false);
+    return true;
+  }
+
   processInput(button: Button): boolean {
     if (this.overlayActive) {
       return false;