Automatic train stations (#1353)

## Description:

Train stations are now built automatically when a factory is
constructed.

Changes:
- When a factory is built, nearby structures are connected to the rail
network
- When a city is built near a factory, it is connected to the rail
network
    - All structures behave the same when a train stops: to be defined
    - Removed station badge
    - Gold income is now related to the structure's level

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced
- [x] I understand that submitting code with bugs that could have been
caught through manual testing blocks releases and new features for all
contributors

## Please put your Discord username so you can be contacted if a bug or
regression is found:

IngloriousTom

src/client/HostLobbyModal.ts

@@ -39,10 +39,7 @@ export class HostLobbyModal extends LitElement {
   @state() private copySuccess = false;
   @state() private players: string[] = [];
   @state() private useRandomMap: boolean = false;
-  @state() private disabledUnits: UnitType[] = [
-    UnitType.Factory,
-    UnitType.Train,
-  ];
+  @state() private disabledUnits: UnitType[] = [UnitType.Factory];
 
   private playersInterval: NodeJS.Timeout | null = null;
   // Add a new timer for debouncing bot changes

src/client/SinglePlayerModal.ts

@@ -40,10 +40,7 @@ export class SinglePlayerModal extends LitElement {
   @state() private gameMode: GameMode = GameMode.FFA;
   @state() private teamCount: number | typeof Duos = 2;
 
-  @state() private disabledUnits: UnitType[] = [
-    UnitType.Factory,
-    UnitType.Train,
-  ];
+  @state() private disabledUnits: UnitType[] = [UnitType.Factory];
 
   private userSettings: UserSettings = new UserSettings();
 

src/client/Transport.ts

@@ -54,10 +54,6 @@ export class SendUpgradeStructureIntentEvent implements GameEvent {
   ) {}
 }
 
-export class SendCreateTrainStationIntentEvent implements GameEvent {
-  constructor(public readonly unitId: number) {}
-}
-
 export class SendAllianceReplyIntentEvent implements GameEvent {
   constructor(
     // The original alliance requestor
@@ -211,9 +207,6 @@ export class Transport {
     this.eventBus.on(SendUpgradeStructureIntentEvent, (e) =>
       this.onSendUpgradeStructureIntent(e),
     );
-    this.eventBus.on(SendCreateTrainStationIntentEvent, (e) =>
-      this.onSendCreateTrainStationIntent(e),
-    );
     this.eventBus.on(SendBoatAttackIntentEvent, (e) =>
       this.onSendBoatAttackIntent(e),
     );
@@ -478,16 +471,6 @@ export class Transport {
     });
   }
 
-  private onSendCreateTrainStationIntent(
-    event: SendCreateTrainStationIntentEvent,
-  ) {
-    this.sendIntent({
-      type: "create_station",
-      clientID: this.lobbyConfig.clientID,
-      unitId: event.unitId,
-    });
-  }
-
   private onSendTargetPlayerIntent(event: SendTargetPlayerIntentEvent) {
     this.sendIntent({
       type: "targetPlayer",

src/client/graphics/layers/UILayer.ts

@@ -10,8 +10,6 @@ import { ProgressBar } from "../ProgressBar";
 import { TransformHandler } from "../TransformHandler";
 import { Layer } from "./Layer";
 
-import trainStationBadge from "../../../../resources/images/buildings/badges/trainStationBadge.png";
-
 const COLOR_PROGRESSION = [
   "rgb(232, 25, 25)",
   "rgb(240, 122, 25)",
@@ -49,7 +47,6 @@ export class UILayer implements Layer {
 
   // Visual settings for selection
   private readonly SELECTION_BOX_SIZE = 6; // Size of the selection box (should be larger than the warship)
-  private badges: Map<string, HTMLImageElement> = new Map();
 
   constructor(
     private game: GameView,
@@ -57,23 +54,6 @@ export class UILayer implements Layer {
     private transformHandler: TransformHandler,
   ) {
     this.theme = game.config().theme();
-    this.loadBadges();
-  }
-
-  private loadBadge(badge: string): Promise<HTMLImageElement> {
-    return new Promise((resolve, reject) => {
-      const img = new Image();
-      img.src = badge;
-      img.onload = () => {
-        this.badges.set(badge, img);
-        resolve(img);
-      };
-      img.onerror = reject;
-    });
-  }
-
-  private async loadBadges() {
-    await Promise.all([this.loadBadge(trainStationBadge)]);
   }
 
   shouldTransform(): boolean {
@@ -165,35 +145,12 @@ export class UILayer implements Layer {
           const endTick = this.game.config().SAMCooldown();
           this.drawLoadingBar(unit, endTick);
         }
-        this.drawBadges(unit);
-        break;
-      case UnitType.City:
-      case UnitType.Port:
-      case UnitType.Factory:
-        this.drawBadges(unit);
         break;
       default:
         return;
     }
   }
 
-  private drawBadges(unit: UnitView) {
-    if (unit.hasTrainStation()) {
-      const icon = this.badges.get(trainStationBadge);
-      if (icon === undefined) {
-        return;
-      }
-      const startX = this.game.x(unit.tile()) - Math.floor(icon.width / 2) + 6;
-      const startY = this.game.y(unit.tile()) - Math.floor(icon.height / 2) - 6;
-
-      if (unit.isActive()) {
-        this.drawIcon(icon, unit, startX, startY);
-      } else {
-        this.clearIcon(icon, startX, startY);
-      }
-    }
-  }
-
   private clearIcon(icon: HTMLImageElement, startX: number, startY: number) {
     if (this.context !== null) {
       this.context.clearRect(startX, startY, icon.width, icon.height);

src/client/utilities/RenderUnitTypeOptions.ts

@@ -18,7 +18,6 @@ const unitOptions: { type: UnitType; translationKey: string }[] = [
   { type: UnitType.AtomBomb, translationKey: "unit_type.atom_bomb" },
   { type: UnitType.HydrogenBomb, translationKey: "unit_type.hydrogen_bomb" },
   { type: UnitType.MIRV, translationKey: "unit_type.mirv" },
-  { type: UnitType.Train, translationKey: "unit_type.train" },
   { type: UnitType.Factory, translationKey: "unit_type.factory" },
 ];