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Pods/SwiftEntryKit/Source/MessageViews/MessagesUtils/EKRatingSymbolsContainerView.swift

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+//
+//  EKRatingSymbolsContainerView.swift
+//  SwiftEntryKit
+//
+//  Created by Daniel Huri on 6/1/18.
+//  Copyright (c) 2018 huri000@gmail.com. All rights reserved.
+//
+
+import UIKit
+
+final public class EKRatingSymbolsContainerView: UIView {
+    
+    private var message: EKRatingMessage!
+    private var symbolsArray: [EKRatingSymbolView] = []
+    
+    public func setup(with message: EKRatingMessage,
+                      externalSelection: @escaping EKRatingMessage.Selection) {
+        self.message = message
+        let internalSelection = { [unowned self] (index: Int) in
+            self.select(index: index)
+            externalSelection(index)
+        }
+        
+        for (index, item) in message.ratingItems.enumerated() {
+            let itemView = EKRatingSymbolView(unselectedImage: item.unselectedImage,
+                                              selectedImage: item.selectedImage,
+                                              selection: internalSelection)
+            itemView.tag = index
+            addSubview(itemView)
+            itemView.set(.height, of: item.size.height)
+            itemView.set(.width, of: item.size.width)
+            symbolsArray.append(itemView)
+        }
+        symbolsArray.layoutToSuperview(axis: .vertically, priority: .must)
+        symbolsArray.spread(.horizontally, stretchEdgesToSuperview: true)
+        
+        select(index: message.selectedIndex)
+    }
+    
+    private func select(index: Int? = nil) {
+        var delay: TimeInterval = 0
+        for (i, view) in symbolsArray.enumerated() {
+            DispatchQueue.main.asyncAfter(deadline: .now() + delay) {
+                if let index = index, i <= index {
+                    view.isSelected = true
+                    view.transform = CGAffineTransform(scaleX: 1.5, y: 1.5)
+                } else if view.isSelected || index == nil {
+                    view.isSelected = false
+                    view.transform = CGAffineTransform(scaleX: 0.5, y: 0.5)
+                }
+                UIView.animate(withDuration: 0.6,
+                               delay: 0,
+                               usingSpringWithDamping: 0.5,
+                               initialSpringVelocity: 0,
+                               options: [.allowUserInteraction], animations: {
+                    view.transform = .identity
+                }, completion: nil)
+            }
+            delay += 0.05
+        }
+    }
+}