From 17408cbb9a3b607db00773213b200961d2a8eece Mon Sep 17 00:00:00 2001
From: Isaac <>
Date: Fri, 9 Aug 2024 19:38:30 +0400
Subject: [PATCH] Add star background effect

---
 .../Sources/ReactionSelectionNode.swift       | 48 +++++++++++++++++--
 1 file changed, 44 insertions(+), 4 deletions(-)

diff --git a/submodules/ReactionSelectionNode/Sources/ReactionSelectionNode.swift b/submodules/ReactionSelectionNode/Sources/ReactionSelectionNode.swift
index 31f8bad84b..2da4a49198 100644
--- a/submodules/ReactionSelectionNode/Sources/ReactionSelectionNode.swift
+++ b/submodules/ReactionSelectionNode/Sources/ReactionSelectionNode.swift
@@ -56,11 +56,13 @@ protocol ReactionItemNode: ASDisplayNode {
 private let lockedBackgroundImage: UIImage = generateFilledCircleImage(diameter: 16.0, color: .white)!.withRenderingMode(.alwaysTemplate)
 private let lockedBadgeIcon: UIImage? = generateTintedImage(image: UIImage(bundleImageName: "Chat/Input/Media/PanelBadgeLock"), color: .white)
 
-private final class StarsReactionEffectLayer: SimpleLayer {
+private final class StarsButtonEffectLayer: SimpleLayer {
+    let emitterLayer = CAEmitterLayer()
+    
     override init() {
         super.init()
         
-        //self.backgroundColor = UIColor.lightGray.withAlphaComponent(0.2).cgColor
+        self.addSublayer(self.emitterLayer)
     }
     
     override init(layer: Any) {
@@ -71,7 +73,45 @@ private final class StarsReactionEffectLayer: SimpleLayer {
         fatalError("init(coder:) has not been implemented")
     }
     
+    private func setup() {
+        let color = UIColor(rgb: 0xffbe27)
+        
+        let emitter = CAEmitterCell()
+        emitter.name = "emitter"
+        emitter.contents = UIImage(bundleImageName: "Premium/Stars/Particle")?.cgImage
+        emitter.birthRate = 25.0
+        emitter.lifetime = 2.0
+        emitter.velocity = 12.0
+        emitter.velocityRange = 3
+        emitter.scale = 0.1
+        emitter.scaleRange = 0.08
+        emitter.alphaRange = 0.1
+        emitter.emissionRange = .pi * 2.0
+        emitter.setValue(3.0, forKey: "mass")
+        emitter.setValue(2.0, forKey: "massRange")
+        
+        let staticColors: [Any] = [
+            color.withAlphaComponent(0.0).cgColor,
+            color.cgColor,
+            color.cgColor,
+            color.withAlphaComponent(0.0).cgColor
+        ]
+        let staticColorBehavior = CAEmitterCell.createEmitterBehavior(type: "colorOverLife")
+        staticColorBehavior.setValue(staticColors, forKey: "colors")
+        emitter.setValue([staticColorBehavior], forKey: "emitterBehaviors")
+        
+        self.emitterLayer.emitterCells = [emitter]
+    }
+    
     func update(size: CGSize) {
+        if self.emitterLayer.emitterCells == nil {
+            self.setup()
+        }
+        self.emitterLayer.emitterShape = .circle
+        self.emitterLayer.emitterSize = CGSize(width: size.width * 0.7, height: size.height * 0.7)
+        self.emitterLayer.emitterMode = .surface
+        self.emitterLayer.frame = CGRect(origin: .zero, size: size)
+        self.emitterLayer.emitterPosition = CGPoint(x: size.width / 2.0, y: size.height / 2.0)
     }
 }
 
@@ -88,7 +128,7 @@ public final class ReactionNode: ASDisplayNode, ReactionItemNode {
     let selectionTintView: UIView?
     let selectionView: UIView?
     
-    private var starsEffectLayer: StarsReactionEffectLayer?
+    private var starsEffectLayer: StarsButtonEffectLayer?
     
     private var animateInAnimationNode: AnimatedStickerNode?
     private var staticAnimationPlaceholderView: UIImageView?
@@ -151,7 +191,7 @@ public final class ReactionNode: ASDisplayNode, ReactionItemNode {
         super.init()
         
         if case .stars = item.reaction.rawValue {
-            let starsEffectLayer = StarsReactionEffectLayer()
+            let starsEffectLayer = StarsButtonEffectLayer()
             self.starsEffectLayer = starsEffectLayer
             self.layer.addSublayer(starsEffectLayer)
         }