Add Systems Component [with merge conflicts resolved]

TowerForge/TowerForge.xcodeproj/project.pbxproj

@@ -73,6 +73,9 @@
 		52DF5FFB2BA3601400135367 /* HealthComponent.swift in Sources */ = {isa = PBXBuildFile; fileRef = 52DF5FFA2BA3601400135367 /* HealthComponent.swift */; };
 		52DF5FFF2BA3656500135367 /* ShootingComponent.swift in Sources */ = {isa = PBXBuildFile; fileRef = 52DF5FFE2BA3656500135367 /* ShootingComponent.swift */; };
 		9B8696552BAD759F0002377C /* Grid.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9B8696542BAD759F0002377C /* Grid.swift */; };
+		BA443D3D2BAD9557009F0FFB /* RemoveSystem.swift in Sources */ = {isa = PBXBuildFile; fileRef = BA443D3C2BAD9557009F0FFB /* RemoveSystem.swift */; };
+		BA443D3F2BAD9774009F0FFB /* RemoveEvent.swift in Sources */ = {isa = PBXBuildFile; fileRef = BA443D3E2BAD9774009F0FFB /* RemoveEvent.swift */; };
+		BA443D422BAD9885009F0FFB /* DamageEventTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = BA443D412BAD9885009F0FFB /* DamageEventTests.swift */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -162,6 +165,9 @@
 		52DF5FFA2BA3601400135367 /* HealthComponent.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = HealthComponent.swift; sourceTree = "<group>"; };
 		52DF5FFE2BA3656500135367 /* ShootingComponent.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ShootingComponent.swift; sourceTree = "<group>"; };
 		9B8696542BAD759F0002377C /* Grid.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Grid.swift; sourceTree = "<group>"; };
+		BA443D3C2BAD9557009F0FFB /* RemoveSystem.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RemoveSystem.swift; sourceTree = "<group>"; };
+		BA443D3E2BAD9774009F0FFB /* RemoveEvent.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RemoveEvent.swift; sourceTree = "<group>"; };
+		BA443D412BAD9885009F0FFB /* DamageEventTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DamageEventTests.swift; sourceTree = "<group>"; };
 		BABB7C052BA9A41000D54DAE /* TowerForceTestPlan.xctestplan */ = {isa = PBXFileReference; lastKnownFileType = text; path = TowerForceTestPlan.xctestplan; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
@@ -219,9 +225,11 @@
 		3C9955C32BA585CD00D33FA5 /* Systems */ = {
 			isa = PBXGroup;
 			children = (
+				3C9955AC2BA483B100D33FA5 /* TFSystem.swift */,
 				3C9955C42BA585DD00D33FA5 /* HealthSystem.swift */,
 				3C769A712BA58DE700F454F9 /* MovementSystem.swift */,
 				3C769A732BA591BD00F454F9 /* SpawnSystem.swift */,
+				BA443D3C2BAD9557009F0FFB /* RemoveSystem.swift */,
 			);
 			path = Systems;
 			sourceTree = "<group>";
@@ -233,6 +241,7 @@
 				3C9955C92BA5888F00D33FA5 /* SpawnEvent.swift */,
 				3C9955CB2BA5889800D33FA5 /* MoveEvent.swift */,
 				3C9955C72BA5865C00D33FA5 /* ConcurrentEvent.swift */,
+				BA443D3E2BAD9774009F0FFB /* RemoveEvent.swift */,
 			);
 			path = "Implemented Events";
 			sourceTree = "<group>";
@@ -296,6 +305,7 @@
 		5295A2002BA9FB97005018A8 /* Scenes */ = {
 			isa = PBXGroup;
 			children = (
+				52DF5FAB2BA32B2300135367 /* Actions.sks */,
 				52DF5FA92BA32B2300135367 /* GameScene.sks */,
 				52DF5FAD2BA32B2300135367 /* GameScene.swift */,
 				5295A2032BA9FED4005018A8 /* MenuScene.swift */,
@@ -346,6 +356,8 @@
 		52DF5FA62BA32B2300135367 /* TowerForge */ = {
 			isa = PBXGroup;
 			children = (
+				52DF5FB42BA32B2600135367 /* Assets.xcassets */,
+				BA443D432BAD98CD009F0FFB /* AppMain */,
 				3CE9514D2BAC8925008B2785 /* Rendering */,
 				5295A2082BAAE14B005018A8 /* Controllers */,
 				5295A2052BAA0208005018A8 /* Nodes */,
@@ -355,12 +367,7 @@
 				3CCF9CAE2BAB1A96004D170E /* SceneUpdateDelegate.swift */,
 				5295A2012BA9FBD9005018A8 /* SceneManagerDelegate.swift */,
 				52DF5FDB2BA32CEF00135367 /* LevelManager */,
-				52DF5FA72BA32B2300135367 /* AppDelegate.swift */,
-				52DF5FAB2BA32B2300135367 /* Actions.sks */,
 				3CCF9CB02BAB1BCE004D170E /* GameWorld.swift */,
-				52DF5FB12BA32B2300135367 /* Main.storyboard */,
-				52DF5FB42BA32B2600135367 /* Assets.xcassets */,
-				52DF5FB62BA32B2600135367 /* LaunchScreen.storyboard */,
 				9B8696542BAD759F0002377C /* Grid.swift */,
 			);
 			path = TowerForge;
@@ -369,6 +376,7 @@
 		52DF5FC02BA32B2600135367 /* TowerForgeTests */ = {
 			isa = PBXGroup;
 			children = (
+				BA443D402BAD9872009F0FFB /* EventTests */,
 				52DF5FE22BA3386400135367 /* TFCoreTests */,
 				52DF5FC12BA32B2600135367 /* TowerForgeTests.swift */,
 			);
@@ -396,7 +404,6 @@
 				52DF5FDD2BA32D7E00135367 /* EntityManager.swift */,
 				3CCF9CB22BAB1F42004D170E /* SystemManager.swift */,
 				52DF5FEC2BA34D0300135367 /* TFComponent.swift */,
-				3C9955AC2BA483B100D33FA5 /* TFSystem.swift */,
 				52DF5FEE2BA34EA000135367 /* TFEntity.swift */,
 			);
 			path = LevelManager;
@@ -442,6 +449,24 @@
 			path = Components;
 			sourceTree = "<group>";
 		};
+		BA443D402BAD9872009F0FFB /* EventTests */ = {
+			isa = PBXGroup;
+			children = (
+				BA443D412BAD9885009F0FFB /* DamageEventTests.swift */,
+			);
+			path = EventTests;
+			sourceTree = "<group>";
+		};
+		BA443D432BAD98CD009F0FFB /* AppMain */ = {
+			isa = PBXGroup;
+			children = (
+				52DF5FB12BA32B2300135367 /* Main.storyboard */,
+				52DF5FB62BA32B2600135367 /* LaunchScreen.storyboard */,
+				52DF5FA72BA32B2300135367 /* AppDelegate.swift */,
+			);
+			path = AppMain;
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */
 
 /* Begin PBXNativeTarget section */
@@ -605,6 +630,7 @@
 				52578B8C2BA627B200B4D76C /* Team.swift in Sources */,
 				3CCF9CB72BAB2877004D170E /* MainMenuViewController.swift in Sources */,
 				52DF5FFF2BA3656500135367 /* ShootingComponent.swift in Sources */,
+				BA443D3D2BAD9557009F0FFB /* RemoveSystem.swift in Sources */,
 				3C9955CC2BA5889800D33FA5 /* MoveEvent.swift in Sources */,
 				5200624E2BA8D597000DBA30 /* AiComponent.swift in Sources */,
 				3C9955C22BA5838900D33FA5 /* EventOutput.swift in Sources */,
@@ -653,6 +679,7 @@
 				520062562BA8E026000DBA30 /* Spawnable.swift in Sources */,
 				52DF5FFB2BA3601400135367 /* HealthComponent.swift in Sources */,
 				3C9955BC2BA563A800D33FA5 /* TFEvent.swift in Sources */,
+				BA443D3F2BAD9774009F0FFB /* RemoveEvent.swift in Sources */,
 				5295A2072BAA02FD005018A8 /* TFButton.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -663,6 +690,7 @@
 			files = (
 				52DF5FC22BA32B2600135367 /* TowerForgeTests.swift in Sources */,
 				52DF5FE42BA3391200135367 /* TFTexturesTests.swift in Sources */,
+				BA443D422BAD9885009F0FFB /* DamageEventTests.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};

TowerForge/TowerForge/LevelManager/Components/BaseComponents/MovableComponent.swift

@@ -18,6 +18,15 @@ class MovableComponent: TFComponent {
         super.init()
     }
 
+    func updatePosition(to position: CGPoint) {
+         self.position = position
+     }
+
+     func updatePosition(with vector: CGVector) {
+         self.position.x += vector.dx
+         self.position.y += vector.dy
+     }
+
     override func update(deltaTime: TimeInterval) {
         guard let entity = entity,
               let positionComponent = entity.component(ofType: PositionComponent.self),

TowerForge/TowerForge/LevelManager/Components/GameComponents/HealthComponent.swift

@@ -11,6 +11,9 @@ class HealthComponent: TFComponent {
     var currentHealth: CGFloat
     var maxHealth: CGFloat
     private let entityManager: EntityManager
+    var isZero: Bool {
+        currentHealth.isZero
+    }
 
     init(maxHealth: CGFloat, entityManager: EntityManager) {
         self.currentHealth = maxHealth
@@ -30,10 +33,21 @@ class HealthComponent: TFComponent {
         }
     }
 
+    /// Adjusts health by the specified amount.
+    func adjustHealth(amount: CGFloat) {
+         if amount < 0 {
+             decreaseHealth(amount: abs(amount))
+         } else {
+             increaseHealth(amount: amount)
+         }
+     }
+
+    /// Decreases currentHealth by the specified amount with a floor of 0.
     func decreaseHealth(amount: CGFloat) {
-        self.currentHealth -= amount
+        self.currentHealth = max(self.currentHealth - amount, 0)
     }
 
+    /// Increases currentHealth by the specific amount with a ceiling of maxHealth
     func increaseHealth(amount: CGFloat) {
         self.currentHealth = min(self.currentHealth + amount, self.maxHealth)
     }

TowerForge/TowerForge/LevelManager/Events/EventManager.swift

@@ -22,8 +22,9 @@ class EventManager {
         while !eventQueue.isEmpty {
             let currentEvent = eventQueue.removeFirst()
 
-            let output = currentEvent.execute(in: target)
-            output.events.forEach { eventQueue.append($0) }
+            if let output = currentEvent.execute(in: target) {
+                output.events.forEach { eventQueue.append($0) }
+            }
         }
     }
 }

TowerForge/TowerForge/LevelManager/Events/Implemented Events/ConcurrentEvent.swift

@@ -21,11 +21,16 @@ struct ConcurrentEvent: TFEvent {
         self.event2 = event2
     }
 
-    func execute(in target: any EventTarget) -> EventOutput {
-        var eventOutput = event1.execute(in: target)
-        let eventOutput2 = event2.execute(in: target)
-        eventOutput.combine(with: eventOutput2)
+    func execute(in target: any EventTarget) -> EventOutput? {
+        guard var eventOutput = event1.execute(in: target) else {
+            return nil
+        }
+
+        guard let eventOutput2 = event2.execute(in: target) else {
+            return eventOutput
+        }
 
+        eventOutput.combine(with: eventOutput2)
         return eventOutput
     }
 }

TowerForge/TowerForge/LevelManager/Events/Implemented Events/DamageEvent.swift

@@ -19,8 +19,17 @@ struct DamageEvent: TFEvent {
         self.damage = damage
     }
 
-    func execute(in target: any EventTarget) -> EventOutput {
-        target.system(ofType: HealthSystem.self) // TODO: Handle Damge Event
+    func execute(in target: any EventTarget) -> EventOutput? {
+        guard let healthSystem = target.system(ofType: HealthSystem.self) else {
+            return nil
+        }
+        let healthIsZero = healthSystem.modifyHealth(for: entityId, with: damage)
+        if healthIsZero {
+            var newEventOutput = EventOutput()
+            newEventOutput.add(RemoveEvent(on: entityId, at: timestamp))
+            return newEventOutput
+        }
+
         return EventOutput()
     }
 }

TowerForge/TowerForge/LevelManager/Events/Implemented Events/MoveEvent.swift

@@ -1,10 +1,3 @@
-//
-//  MoveEvent.swift
-//  TowerForge
-//
-//  Created by Zheng Ze on 16/3/24.
-//
-
 import Foundation
 
 struct MoveEvent: TFEvent {
@@ -18,8 +11,11 @@ struct MoveEvent: TFEvent {
         self.displacement = displacement
     }
 
-    func execute(in target: any EventTarget) -> EventOutput {
-        target.system(ofType: MovementSystem.self) // TODO: Handle Move Event
+    func execute(in target: any EventTarget) -> EventOutput? {
+        guard let movementSystem = target.system(ofType: MovementSystem.self) else {
+            return nil
+        }
+        movementSystem.handleMovement(for: entityId, with: displacement)
         return EventOutput()
     }
 }

TowerForge/TowerForge/LevelManager/Events/Implemented Events/RemoveEvent.swift

@@ -0,0 +1,20 @@
+import Foundation
+
+struct RemoveEvent: TFEvent {
+    let timestamp: TimeInterval
+    let entityId: UUID
+
+    init(on entityId: UUID, at timestamp: TimeInterval) {
+        self.timestamp = timestamp
+        self.entityId = entityId
+    }
+
+    func execute(in target: any EventTarget) -> EventOutput? {
+        guard let removeSystem = target.system(ofType: RemoveSystem.self) else {
+            return nil
+        }
+
+        removeSystem.handleRemove(for: entityId)
+        return EventOutput()
+    }
+}

TowerForge/TowerForge/LevelManager/Events/Implemented Events/SpawnEvent.swift

@@ -1,13 +1,6 @@
-//
-//  SpawnEvent.swift
-//  TowerForge
-//
-//  Created by Zheng Ze on 16/3/24.
-//
-
 import Foundation
 
-struct SpawnEvent<T: TFEntity>: TFEvent {
+struct SpawnEvent: TFEvent {
     let timestamp: TimeInterval
     let entityId: UUID
 
@@ -21,8 +14,13 @@ struct SpawnEvent<T: TFEntity>: TFEvent {
         self.velocity = velocity
     }
 
-    func execute(in target: any EventTarget) -> EventOutput {
-        target.system(ofType: SpawnSystem.self) // TODO: Handle Spawn Event
+    func execute(in target: any EventTarget) -> EventOutput? {
+        guard let spawnSystem = target.system(ofType: SpawnSystem.self) else {
+            return nil
+        }
+        var entity = TFEntity()
+        entity.addComponent(MovableComponent(position: position, velocity: velocity))
+        spawnSystem.handleSpawn(with: entity)
         return EventOutput()
     }
 }

TowerForge/TowerForge/LevelManager/Events/TFEvent.swift

@@ -11,7 +11,9 @@ protocol TFEvent {
     var timestamp: TimeInterval { get }
     var entityId: UUID { get }
 
-    func execute(in target: EventTarget) -> EventOutput
+    /// Execute method returns an optional EventOutput as not all event executions
+    /// will return an EventOutput
+    func execute(in target: EventTarget) -> EventOutput?
 }
 
 extension TFEvent {

TowerForge/TowerForge/LevelManager/Systems/HealthSystem.swift

@@ -1,12 +1,30 @@
-//
-//  HealthSystem.swift
-//  TowerForge
-//
-//  Created by Zheng Ze on 16/3/24.
-//
-
 import Foundation
 
 class HealthSystem: TFSystem {
+    var isActive = false
+    weak var entityManager: EntityManager?
+    weak var eventManager: EventManager?
+
+    init(entityManager: EntityManager, eventManager: EventManager) {
+        self.entityManager = entityManager
+        self.eventManager = eventManager
+    }
+
+    /// Modifies the health of the entity associated with the specified UUID according
+    /// to the provided healthpoints amount.
+    /// - Parameters:
+    ///   - entityId: UUID of the entity whose health component is to be modified
+    ///   - hp: Value of the required adjustment of health. Can be positive or negative.
+    func modifyHealth(for entityId: UUID, with hp: CGFloat) -> Bool {
+        /*guard isActive else { TODO: Implement boolean check
+            return
+        }*/
+        guard let currentEntity = entityManager?.entity(with: entityId),
+              let healthComponent = currentEntity.component(ofType: HealthComponent.self) else {
+            return false
+        }
 
+        healthComponent.adjustHealth(amount: hp)
+        return healthComponent.isZero
+    }
 }