Folder structure

assets/Scripts/Game/Unit/Player/Player.ts

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+import { BoxCollider2D, Collider2D, Component, Vec2, Vec3, _decorator } from "cc";
+import { IInput } from "../../Input/IInput";
+import { UnitHealth } from "../UnitHealth";
+import { UnitLevel } from "../UnitLevel";
+import { PlayerUI } from "./PlayerUI/PlayerUI";
+import { Weapon } from "./Weapon/Weapon";
+
+const { ccclass, property } = _decorator;
+
+@ccclass("Player")
+export class Player extends Component {
+    @property private speed = 0;
+    @property(BoxCollider2D) private collider: BoxCollider2D;
+    @property(PlayerUI) private playerUI: PlayerUI;
+
+    private input: IInput;
+    private weapon: Weapon;
+    private health: UnitHealth;
+    private level: UnitLevel;
+
+    public init(input: IInput, weapon: Weapon, maxHp: number, requiredLevelXps: number[]): void {
+        this.input = input;
+        this.weapon = weapon;
+        this.health = new UnitHealth(maxHp);
+        this.level = new UnitLevel(requiredLevelXps);
+
+        this.weapon.node.parent = this.node;
+        this.weapon.node.setPosition(new Vec3());
+
+        this.playerUI.init(this.health);
+    }
+
+    public get Health(): UnitHealth {
+        return this.health;
+    }
+
+    public get Level(): UnitLevel {
+        return this.level;
+    }
+
+    public get Weapon(): Weapon {
+        return this.weapon;
+    }
+
+    public get Collider(): Collider2D {
+        return this.collider;
+    }
+
+    public gameTick(deltaTime: number): void {
+        const movement: Vec2 = this.input.getAxis();
+        movement.x *= deltaTime * this.speed;
+        movement.y *= deltaTime * this.speed;
+
+        const newPosition: Vec3 = this.node.worldPosition;
+        newPosition.x += movement.x;
+        newPosition.y += movement.y;
+
+        this.node.setWorldPosition(newPosition);
+
+        this.weapon.gameTick(deltaTime);
+    }
+}

assets/Scripts/Game/Unit/Player/Player.ts.meta

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+{
+  "ver": "4.0.23",
+  "importer": "typescript",
+  "imported": true,
+  "uuid": "b570abb8-1bcd-4ef0-85e8-4d783531001d",
+  "files": [],
+  "subMetas": {},
+  "userData": {}
+}

assets/Scripts/Game/Unit/Player/PlayerUI.meta

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+{
+  "ver": "1.1.0",
+  "importer": "directory",
+  "imported": true,
+  "uuid": "7eadb488-192c-4370-9e59-20f27929fba1",
+  "files": [],
+  "subMetas": {},
+  "userData": {
+    "compressionType": {},
+    "isRemoteBundle": {}
+  }
+}

assets/Scripts/Game/Unit/Player/PlayerUI/PlayerHealthUI.ts

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+import { Component, ProgressBar, _decorator } from "cc";
+import { UnitHealth } from "../UnitHealth";
+const { ccclass, property } = _decorator;
+
+@ccclass("PlayerHealthUI")
+export class PlayerHealthUI extends Component {
+    @property(ProgressBar) public healthBar: ProgressBar;
+    private health: UnitHealth;
+
+    public init(health: UnitHealth): void {
+        this.healthBar.progress = 1;
+        this.health = health;
+        this.health.HealthPointsChangeEvent.on(this.updateHealthBar, this);
+    }
+
+    private updateHealthBar(): void {
+        this.healthBar.progress = this.health.HealthPoints / this.health.MaxHealthPoints;
+    }
+}

assets/Scripts/Game/Unit/Player/PlayerUI/PlayerHealthUI.ts.meta

@@ -0,0 +1,9 @@
+{
+  "ver": "4.0.23",
+  "importer": "typescript",
+  "imported": true,
+  "uuid": "def45aaf-cc88-4ec6-97ff-4d5b0beb015b",
+  "files": [],
+  "subMetas": {},
+  "userData": {}
+}

assets/Scripts/Game/Unit/Player/PlayerUI/PlayerUI.ts

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+import { Component, _decorator } from "cc";
+import { UnitHealth } from "../UnitHealth";
+import { PlayerHealthUI } from "./PlayerHealthUI";
+const { ccclass, property } = _decorator;
+
+@ccclass("PlayerUI")
+export class PlayerUI extends Component {
+    @property(PlayerHealthUI) private healthUI: PlayerHealthUI;
+
+    public init(playerHealth: UnitHealth): void {
+        this.healthUI.init(playerHealth);
+    }
+}

assets/Scripts/Game/Unit/Player/PlayerUI/PlayerUI.ts.meta

@@ -0,0 +1,9 @@
+{
+  "ver": "4.0.23",
+  "importer": "typescript",
+  "imported": true,
+  "uuid": "6247f0de-45c1-4e74-89aa-388c217ce3a3",
+  "files": [],
+  "subMetas": {},
+  "userData": {}
+}

assets/Scripts/Game/Unit/Player/Weapon.meta

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+{
+  "ver": "1.1.0",
+  "importer": "directory",
+  "imported": true,
+  "uuid": "b232195c-46e2-4508-9f71-5efb42ab490f",
+  "files": [],
+  "subMetas": {},
+  "userData": {
+    "compressionType": {},
+    "isRemoteBundle": {}
+  }
+}

assets/Scripts/Game/Unit/Player/Weapon/UpgradableCollider.ts

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+import { BoxCollider2D, Collider2D, Component, Contact2DType, _decorator } from "cc";
+import { ISignal } from "../../../../Services/EventSystem/ISignal";
+import { Signal } from "../../../../Services/EventSystem/Signal";
+
+const { ccclass, property } = _decorator;
+
+@ccclass("UpgradableCollider")
+export class UpgradableCollider extends Component {
+    @property(BoxCollider2D) private colliders: BoxCollider2D[] = [];
+    private contactBeginEvent: Signal<Collider2D> = new Signal<Collider2D>();
+    private currentUpgradeLevel = 0;
+
+    public init(): void {
+        this.setUpgradeLevel();
+
+        for (const collider of this.colliders) {
+            collider.on(Contact2DType.BEGIN_CONTACT, this.onColliderContactBegin, this);
+        }
+    }
+
+    public get ContactBeginEvent(): ISignal<Collider2D> {
+        return this.contactBeginEvent;
+    }
+
+    public upgrade(): void {
+        if (this.currentUpgradeLevel == this.colliders.length - 1) throw new Error("Already at max upgrade! " + this.currentUpgradeLevel);
+
+        this.currentUpgradeLevel++;
+        this.setUpgradeLevel();
+    }
+
+    private setUpgradeLevel(): void {
+        for (const collider of this.colliders) {
+            collider.node.active = false;
+        }
+
+        this.colliders[this.currentUpgradeLevel].node.active = true;
+    }
+
+    private onColliderContactBegin(thisCollider: Collider2D, otherCollider: Collider2D): void {
+        this.contactBeginEvent.trigger(otherCollider);
+    }
+}

assets/Scripts/Game/Unit/Player/Weapon/UpgradableCollider.ts.meta

@@ -0,0 +1,9 @@
+{
+  "ver": "4.0.23",
+  "importer": "typescript",
+  "imported": true,
+  "uuid": "bba49b00-3fe5-4042-85f3-7d1f017d75d3",
+  "files": [],
+  "subMetas": {},
+  "userData": {}
+}

assets/Scripts/Game/Unit/Player/Weapon/Weapon.ts

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+import { Animation, AnimationState, Component, _decorator } from "cc";
+import { GameTimer } from "../../../../Services/GameTimer";
+import { WeaponSettings } from "../../../Data/GameSettings";
+
+import { UpgradableCollider } from "./UpgradableCollider";
+const { ccclass, property } = _decorator;
+
+@ccclass("Weapon")
+export class Weapon extends Component {
+    @property(Animation) private weaponAnimation: Animation;
+    @property(UpgradableCollider) private upgradableCollider: UpgradableCollider;
+
+    private strikeTimer: GameTimer;
+    private strikeState: AnimationState;
+    private damage: number;
+
+    public init(settings: WeaponSettings): void {
+        this.strikeTimer = new GameTimer(settings.strikeDelay);
+        this.damage = settings.damage;
+        this.node.active = false;
+
+        this.weaponAnimation.on(Animation.EventType.FINISHED, this.endStrike, this);
+        this.strikeState = this.weaponAnimation.getState(this.weaponAnimation.clips[0].name);
+        this.strikeState.speed = 1;
+
+        this.upgradableCollider.init();
+    }
+
+    public gameTick(deltaTime: number): void {
+        this.strikeTimer.gameTick(deltaTime);
+        if (this.strikeTimer.tryFinishPeriod()) {
+            this.strike();
+        }
+    }
+
+    public get Collider(): UpgradableCollider {
+        return this.upgradableCollider;
+    }
+
+    public get Damage(): number {
+        return this.damage;
+    }
+
+    public upgradeWeaponDamage(): void {
+        this.damage++;
+    }
+    public upgradeWeaponLength(): void {
+        this.upgradableCollider.upgrade();
+    }
+
+    private strike(): void {
+        this.node.active = true;
+        this.weaponAnimation.play(this.strikeState.name);
+    }
+
+    private endStrike(): void {
+        this.node.active = false;
+    }
+}

assets/Scripts/Game/Unit/Player/Weapon/Weapon.ts.meta

@@ -0,0 +1,9 @@
+{
+  "ver": "4.0.23",
+  "importer": "typescript",
+  "imported": true,
+  "uuid": "2391b8b7-f9fa-42a8-b046-55ff57b07d02",
+  "files": [],
+  "subMetas": {},
+  "userData": {}
+}