From 7e3b0e0d2a0c30872d8e5b52fc0d445045460b78 Mon Sep 17 00:00:00 2001
From: PayHereDevs <support@payhere.lk>
Date: Wed, 18 May 2022 12:56:21 +0530
Subject: [PATCH] SDK crashes for Pre-approval & Recurring type, when payment
 UI is not loaded fully (#16)

* Add missing images and changed default mid on demoapp

* Add handling of waiting for payment UI

* Bump versions

Co-authored-by: Thisura98 <thisura1998@gmail.com>
---
 demoapp/ViewController.swift                  |   7 +-
 payHereSDK.podspec                            |   2 +-
 payHereSDK.xcodeproj/project.pbxproj          |   4 +
 payHereSDK/Sources/Model/PaymentUI.swift      |   4 +
 .../Sources/PHBottomViewController.swift      | 123 +++++++++++-------
 payHereSDK/Sources/WaitUntil.swift            |  68 ++++++++++
 .../warning.imageset/Contents.json            |  23 ++++
 .../warning.imageset/warning.png              | Bin 0 -> 3860 bytes
 .../warning.imageset/warning@2x.png           | Bin 0 -> 8421 bytes
 .../warning.imageset/warning@3x.png           | Bin 0 -> 4728 bytes
 10 files changed, 181 insertions(+), 50 deletions(-)
 create mode 100644 payHereSDK/Sources/WaitUntil.swift
 create mode 100644 payHereSDK/Sources/image.xcassets/warning.imageset/Contents.json
 create mode 100644 payHereSDK/Sources/image.xcassets/warning.imageset/warning.png
 create mode 100644 payHereSDK/Sources/image.xcassets/warning.imageset/warning@2x.png
 create mode 100644 payHereSDK/Sources/image.xcassets/warning.imageset/warning@3x.png

diff --git a/demoapp/ViewController.swift b/demoapp/ViewController.swift
index 2cf2ea5..fa6805e 100644
--- a/demoapp/ViewController.swift
+++ b/demoapp/ViewController.swift
@@ -13,7 +13,7 @@ class ViewController: UIViewController {
     
     
     
-    let merchantID = "1211149" //"1211149" //"210251"
+    let merchantID = "210251" //"1211149" //"210251"
    
     var initRequest : PHInitialRequest?
 
@@ -157,6 +157,11 @@ extension ViewController : PHViewControllerDelegate{
     
     func onErrorReceived(error: Error) {
         print("✋ Error",error)
+        
+        let ac = UIAlertController(title: "Error Occurred", message: error.localizedDescription, preferredStyle: .alert)
+        let okAction = UIAlertAction(title: "OK", style: .default, handler: nil)
+        ac.addAction(okAction)
+        present(ac, animated: true, completion: nil)
     }
     
     func onResponseReceived(response: PHResponse<Any>?) {
diff --git a/payHereSDK.podspec b/payHereSDK.podspec
index 9d8e72d..16c591b 100644
--- a/payHereSDK.podspec
+++ b/payHereSDK.podspec
@@ -8,7 +8,7 @@ s.summary = "Mobile SDK for payHere"
 s.requires_arc = true
 
 # 2
-s.version = "3.0.3"
+s.version = "3.0.4"
 
 # 3
 s.license = { :type => "MIT", :file => "LICENSE" }
diff --git a/payHereSDK.xcodeproj/project.pbxproj b/payHereSDK.xcodeproj/project.pbxproj
index 394664d..f0775bf 100644
--- a/payHereSDK.xcodeproj/project.pbxproj
+++ b/payHereSDK.xcodeproj/project.pbxproj
@@ -59,6 +59,7 @@
 		C7E9F6C1277C76B70013D2D4 /* PHBottomSheetTableViewSectioHeader.xib in Resources */ = {isa = PBXBuildFile; fileRef = C7E9F6C0277C76B70013D2D4 /* PHBottomSheetTableViewSectioHeader.xib */; };
 		D68AD170D5E2B0BDB07655F7 /* Pods_demoapp.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = C5C73F5CCE9DE42DB20A5A09 /* Pods_demoapp.framework */; };
 		F503041127E4744C008844E5 /* PHUtils.swift in Sources */ = {isa = PBXBuildFile; fileRef = F503041027E4744C008844E5 /* PHUtils.swift */; };
+		F505EC902833418C00F6AC4F /* WaitUntil.swift in Sources */ = {isa = PBXBuildFile; fileRef = F505EC8F2833418C00F6AC4F /* WaitUntil.swift */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -144,6 +145,7 @@
 		D10E7597F9AFFB0D66AE7793 /* Pods_payHereSDK.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_payHereSDK.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		E98AA3326CB2BEE8C4106D35 /* Pods-payHereSDK.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-payHereSDK.debug.xcconfig"; path = "Pods/Target Support Files/Pods-payHereSDK/Pods-payHereSDK.debug.xcconfig"; sourceTree = "<group>"; };
 		F503041027E4744C008844E5 /* PHUtils.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PHUtils.swift; sourceTree = "<group>"; };
+		F505EC8F2833418C00F6AC4F /* WaitUntil.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = WaitUntil.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -292,6 +294,7 @@
 				C746D50F234C9A7300F9D06F /* PHPrecentController.swift */,
 				C799349323A8E72B005E5A7B /* PHBottomViewController.swift */,
 				C72750CC23A75B8A00AE9037 /* image.xcassets */,
+				F505EC8F2833418C00F6AC4F /* WaitUntil.swift */,
 			);
 			path = Sources;
 			sourceTree = "<group>";
@@ -492,6 +495,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				C7A7DA3323C5D6F90029210E /* HeaderCollectionReusableView.swift in Sources */,
+				F505EC902833418C00F6AC4F /* WaitUntil.swift in Sources */,
 				C7E9F6B8277C2FA20013D2D4 /* PayWithHelaPayTableViewCell.swift in Sources */,
 				C72A13D12784500D00F08E22 /* PaymentOptionTableViewCell.swift in Sources */,
 				8A74D7FC20528E5C00CF10AB /* Address.swift in Sources */,
diff --git a/payHereSDK/Sources/Model/PaymentUI.swift b/payHereSDK/Sources/Model/PaymentUI.swift
index 4f7a3d1..1fdf9b6 100644
--- a/payHereSDK/Sources/Model/PaymentUI.swift
+++ b/payHereSDK/Sources/Model/PaymentUI.swift
@@ -17,6 +17,10 @@ import Foundation
      var status: Int?
      var msg: String?
      var data: [String: Datum]?
+     
+     func getDataCount() -> Int{
+         return data?.keys.count ?? 0
+     }
  }
 
  // MARK: - Datum
diff --git a/payHereSDK/Sources/PHBottomViewController.swift b/payHereSDK/Sources/PHBottomViewController.swift
index 8d5a4b0..ce13875 100644
--- a/payHereSDK/Sources/PHBottomViewController.swift
+++ b/payHereSDK/Sources/PHBottomViewController.swift
@@ -55,6 +55,7 @@ internal class PHBottomViewController: UIViewController {
     private var statusResponse : StatusResponse?
     private var timer : Timer?
     private var isBackPressed : Bool =  false
+    private var waitUntilPaymentUI: WaitUntil!
     private let net = NetworkReachabilityManager()
     
     private var bankAccount : [PaymentMethod] = []
@@ -772,31 +773,15 @@ internal class PHBottomViewController: UIViewController {
         
         if let url = submitResponse.data?.url{
             
-            self.tableView.isHidden  = true
-            self.webView.isHidden = false
-            
-            self.webView.contentMode = .scaleAspectFill
-            self.webView.uiDelegate = self
-            self.webView.navigationDelegate = self
-            
-            self.calculateWebHeight()
-            
-            if let URL = URL(string: url){
-                
-                let request = URLRequest(url: URL)
-                self.webView.load(request)
-                self.progressBar.isHidden = false
-                self.webView.isHidden = true
-                
-                
-            }else{
-                //MARK:TODO
-                //ERROR HANDLING
-                self.close {
-                    let error = NSError(domain: "", code: 401, userInfo: [NSLocalizedDescriptionKey: "Invalid URL"])
-                    self.delegate?.onErrorReceived(error: error)
+            waitUntilPaymentUI = WaitUntil(
+                condition: { [weak self] in
+                    return (self?.paymentUI.getDataCount() ?? 0) > 0
+                },
+                onCompletion: { [weak self] in
+                    self?.loadPayHereSubmitUI(url: url)
                 }
-            }
+            )
+            
         }else{
             self.close {
                 let error = NSError(domain: "", code: 401, userInfo: [NSLocalizedDescriptionKey: "Invalid URL"])
@@ -806,39 +791,51 @@ internal class PHBottomViewController: UIViewController {
         
     }
     
-    private func initWebView(_ submitResponse : PayHereInitnSubmitResponse){
+    private func loadPayHereSubmitUI(url: String){
+        self.tableView.isHidden  = true
+        self.webView.isHidden = false
         
+        self.webView.contentMode = .scaleAspectFill
+        self.webView.uiDelegate = self
+        self.webView.navigationDelegate = self
         
+        self.calculateWebHeight()
+        
+        if let URL = URL(string: url){
+            
+            let request = URLRequest(url: URL)
+            self.webView.load(request)
+            self.progressBar.isHidden = false
+            self.webView.isHidden = true
+            
+            
+        }else{
+            //MARK:TODO
+            //ERROR HANDLING
+            self.close {
+                let error = NSError(domain: "", code: 401, userInfo: [NSLocalizedDescriptionKey: "Invalid URL"])
+                self.delegate?.onErrorReceived(error: error)
+            }
+        }
+    }
+    
+    private func initWebView(_ submitResponse : PayHereInitnSubmitResponse){
         
         //        MARK: TODO Remove comment when submit API Precent
         
         if let url = submitResponse.data?.redirection?.url{
             
             //            self.collectionView.isHidden = true
-            self.webView.isHidden = false
-            
-            self.webView.contentMode = .scaleAspectFill
-            self.webView.uiDelegate = self
-            self.webView.navigationDelegate = self
             
-            self.calculateWebHeight()
-            
-            if let URL = URL(string: url){
-                
-                let request = URLRequest(url: URL)
-                self.webView.load(request)
-                self.progressBar.isHidden = false
-                self.webView.isHidden = true
-                
-                
-            }else{
-                //MARK:TODO
-                //ERROR HANDLING
-                self.close {
-                    let error = NSError(domain: "", code: 401, userInfo: [NSLocalizedDescriptionKey: "Invalid URL"])
-                    self.delegate?.onErrorReceived(error: error)
+            waitUntilPaymentUI = WaitUntil(
+                condition: { [weak self] in
+                    return (self?.paymentUI.getDataCount() ?? 0) > 0
+                },
+                onCompletion: { [weak self] in
+                    self?.loadPayHereInitAndSubmitUI(url: url)
                 }
-            }
+            )
+            
         }else{
             self.close {
                 let error = NSError(domain: "", code: 401, userInfo: [NSLocalizedDescriptionKey: "Invalid URL"])
@@ -848,6 +845,33 @@ internal class PHBottomViewController: UIViewController {
         
     }
     
+    private func loadPayHereInitAndSubmitUI(url: String){
+        self.webView.isHidden = false
+        
+        self.webView.contentMode = .scaleAspectFill
+        self.webView.uiDelegate = self
+        self.webView.navigationDelegate = self
+        
+        self.calculateWebHeight()
+        
+        if let URL = URL(string: url){
+            
+            let request = URLRequest(url: URL)
+            self.webView.load(request)
+            self.progressBar.isHidden = false
+            self.webView.isHidden = true
+            
+            
+        }else{
+            //MARK:TODO
+            //ERROR HANDLING
+            self.close {
+                let error = NSError(domain: "", code: 401, userInfo: [NSLocalizedDescriptionKey: "Invalid URL"])
+                self.delegate?.onErrorReceived(error: error)
+            }
+        }
+    }
+    
     func calculateWebHeight(){
         
         var viewSize : ViewSize?
@@ -1174,7 +1198,10 @@ internal class PHBottomViewController: UIViewController {
                         }
                     }
 
-                case .failure(_):
+                case .failure(let error):
+                    self.close {
+                        self.delegate?.onErrorReceived(error: error)
+                    }
                     break
                 }
 
diff --git a/payHereSDK/Sources/WaitUntil.swift b/payHereSDK/Sources/WaitUntil.swift
new file mode 100644
index 0000000..fb9e4e0
--- /dev/null
+++ b/payHereSDK/Sources/WaitUntil.swift
@@ -0,0 +1,68 @@
+//
+//  WaitUntil.swift
+//  payHereSDK
+//
+//  Created by Thisura Dodangoda on 2022-05-17.
+//  Copyright © 2022 PayHere. All rights reserved.
+//
+
+import Foundation
+
+/**
+ Wait until a condition is true to execute a handler
+ */
+internal class WaitUntil{
+    
+    private let condition: (() -> Bool)!
+    private let completion: (() -> Void)!
+    private let timeout: TimeInterval!
+    
+    init(
+        condition: @escaping () -> Bool,
+        onCompletion: @escaping () -> Void,
+        timeout: TimeInterval = 5.0
+    ){
+        self.condition = condition
+        self.completion = onCompletion
+        self.timeout = timeout
+        
+        run()
+    }
+    
+    private func run(){
+        guard !condition() else {
+            completion()
+            return
+        }
+        
+        DispatchQueue.global().async { [weak self] in
+            guard let `self` = self else { return }
+            
+            let start = Date().timeIntervalSince1970
+            var shouldBreak = false
+            var isTimeout = false
+            
+            while(!shouldBreak){
+                usleep(80000)
+                
+                DispatchQueue.main.async {
+                    if self.condition(){
+                        shouldBreak = true
+                    }
+                }
+                
+                if ((Date().timeIntervalSince1970 - start) > self.timeout){
+                    shouldBreak = true
+                    isTimeout = true
+                }
+            }
+            
+            guard !isTimeout else { return }
+            
+            DispatchQueue.main.async {
+                self.completion()
+            }
+        }
+    }
+    
+}
diff --git a/payHereSDK/Sources/image.xcassets/warning.imageset/Contents.json b/payHereSDK/Sources/image.xcassets/warning.imageset/Contents.json
new file mode 100644
index 0000000..acb4256
--- /dev/null
+++ b/payHereSDK/Sources/image.xcassets/warning.imageset/Contents.json
@@ -0,0 +1,23 @@
+{
+  "images" : [
+    {
+      "filename" : "warning.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "filename" : "warning@2x.png",
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "filename" : "warning@3x.png",
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}
diff --git a/payHereSDK/Sources/image.xcassets/warning.imageset/warning.png b/payHereSDK/Sources/image.xcassets/warning.imageset/warning.png
new file mode 100644
index 0000000000000000000000000000000000000000..af8ac97db591a7c33c9788c93bed6ceb1d097dba
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diff --git a/payHereSDK/Sources/image.xcassets/warning.imageset/warning@3x.png b/payHereSDK/Sources/image.xcassets/warning.imageset/warning@3x.png
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