barcode lib v17

@@ -14,6 +14,33 @@ import RSBarcodes_Swift
 import AVFoundation
 
 
+ extension String {
+ 
+     var length: Int {
+         return count
+     }
+ 
+     subscript (i: Int) -> String {
+         return self[i ..< i + 1]
+     }
+ 
+     func substring(fromIndex: Int) -> String {
+         return self[min(fromIndex, length) ..< length]
+     }
+ 
+     func substring(toIndex: Int) -> String {
+         return self[0 ..< max(0, toIndex)]
+     }
+ 
+     subscript (r: Range<Int>) -> String {
+         let range = Range(uncheckedBounds: (lower: max(0, min(length, r.lowerBound)),
+                                             upper: min(length, max(0, r.upperBound))))
+         let start = index(startIndex, offsetBy: range.lowerBound)
+         let end = index(start, offsetBy: range.upperBound - range.lowerBound)
+         return String(self[start ..< end])
+     }
+ }
+
 extension CouponBarcodeView {
     struct headerView: View {
         var goBack: () -> ()
@@ -95,8 +122,44 @@ extension CouponBarcodeView {
             return nil
         }
 
+         func constructBarcode() -> String? {
+             // EAN 13 barcode construction
+            //  let couponData = coupon["coupon_data"] as? [String: Any] ?? ["":""]
+             let couponString = coupon["coupon"] as? String ?? ""
+             
+             if (!couponString.isEmpty) {
+                 var checkDigit = 0;
+                 var result = 0;
+                 
+                 var fixedCouponCode = couponString;
+                 if (fixedCouponCode.count < 12) {
+                     let loops = 12 - fixedCouponCode.count;
+                     var zerosStr = "";
+                     for i in 0 ..< loops {
+                         zerosStr += "0"
+                     }
+                     fixedCouponCode = zerosStr + fixedCouponCode;
+                 }
+ 
+                 var multiplier = 3;
+                 for idx in (0 ... (fixedCouponCode.count - 1)).reversed() {
+                     let curChar = fixedCouponCode[idx];
+                     result += (Int(curChar) ?? 0) * multiplier;
+                     multiplier = multiplier == 3 ? 1 : 3;
+                 }
+                 checkDigit = 10 - (result % 10);
+ 
+                 let barcodeStr = fixedCouponCode + String(checkDigit);
+                 return barcodeStr;
+             }
+ 
+             return ""
+         }
+
         
         var body: some View {
+            let barcodeString = constructBarcode() ?? ""
+
             GeometryReader { geometry in
                 ScrollView(showsIndicators: false) {
                     VStack(alignment: .leading) {
@@ -131,7 +194,7 @@ extension CouponBarcodeView {
                             
                             VStack(alignment: .center) {
                                 VStack {
-                                    Text("1A2C378")
+                                    Text(coupon["coupon"] as? String ?? "")
                                         .fontWeight(.bold)
                                         .font(.system(size: 27))
                                         .foregroundColor(Color(red: 0.2549019607843137, green: 0.3333333333333333, blue: 0.39215686274509803))
@@ -166,7 +229,7 @@ extension CouponBarcodeView {
 //                                    gen.fillColor = UIColor.white
 //                                    gen.strokeColor = UIColor.black
                                     
-                                    if let barcodeImage = RSUnifiedCodeGenerator.shared.generateCode("1234567891234", machineReadableCodeObjectType: AVMetadataObject.ObjectType.ean13.rawValue, targetSize: CGSize(width: 300, height: 300)) {
+                                    if let barcodeImage = RSUnifiedCodeGenerator.shared.generateCode(barcodeString, machineReadableCodeObjectType: AVMetadataObject.ObjectType.ean13.rawValue, targetSize: CGSize(width: 300, height: 300)) {
                                         
 //                                        VStack(alignment: .center) {
 //                                            Image(uiImage: image)
@@ -200,7 +263,7 @@ extension CouponBarcodeView {
 //                                    .aspectRatio(contentMode: .fit)
 //                                    .frame(width: self.uiscreen.width, height: self.uiscreen.height * 0.1)
                                 
-                                Text("1234567891234")
+                                Text(barcodeString)
                                     .fontWeight(.regular)
                                     .font(.system(size: 22))
                                     .foregroundColor(Color(red: 0.2549019607843137, green: 0.3333333333333333, blue: 0.39215686274509803))