Merge pull request #7 from Lilytreasure/pdfgendev

iOS  signature embedding

composeApp/src/iosMain/kotlin/PdfPreview.ios.kt

@@ -16,6 +16,7 @@ actual fun savePdfDoc(fileLocation: (url: String) -> Unit): Launcher {
                     pdfretrived?.lastname?: "",
                     pdfretrived?.email?: "",
                     pdfretrived?.fileName?: "",
+                    signature = pdfretrived?.signature,
                     context = IOSPlatformContext,
                     fileSavedStatus = { location ->
                         fileLocation(location)

composeApp/src/iosMain/kotlin/PdfUtil.ios.kt

@@ -15,13 +15,16 @@ actual object PdfUtil {
         signature: ByteArray?,
         fileSavedStatus: (url: String) -> Unit
     ): String {
-
         val pdf2 = PDFHelper()
         val people = listOf(
             mapOf("firstname" to firstname, "lastname" to lastname, "email" to email)
         )
+        val uiImageData = pdf2.byteArrayToUIImageWithSignature(signature?.map { it.toUByte() })
         val pdfData =
-            pdf2.generatePDFFrom(people) // Ensure this matches the function in your Swift code
+            pdf2.generatePDFFrom(
+                people,
+                uiImageData
+            ) // Ensure this matches the function in your Swift code
         if (pdfData != null) {
             // Save the PDF
             val savedURL =
@@ -34,7 +37,7 @@ actual object PdfUtil {
             return "Error: Failed to generate PDF."
         }
 
-     //Sample to show  different ways to handle cinterop in Local directory
+        //Sample to show  different ways to handle cinterop in Local directory
 //        val pdfHelper = PdfController() // Ensure PdfController is correctly implemented and accessible
 //        // Create a list of people
 //        val people = listOf(
@@ -55,6 +58,5 @@ actual object PdfUtil {
 }
 
 
-
 @Composable
 actual fun getPlatformContext(): PlatformContext = IOSPlatformContext

iosApp/iosApp/pdf/PdfHandler.swift

@@ -9,12 +9,12 @@
 import PDFKit
 import SwiftUI
 
-
 @objc public class PDFHelper: NSObject {
     @objc public override init() {
-          super.init()
-      }
-    @objc public func generatePDF(from people: [[String: String]]) -> Data? {
+        super.init()
+    }
+
+    @objc public func generatePDF(from people: [[String: String]], signature: UIImage?) -> Data? {
         let pageWidth: CGFloat = 612
         let pageHeight: CGFloat = 792
         let margin: CGFloat = 50
@@ -24,6 +24,7 @@ import SwiftUI
         let pdfRenderer = UIGraphicsPDFRenderer(bounds: CGRect(x: 0, y: 0, width: pageWidth, height: pageHeight))
         let rowHeight: CGFloat = 30
         let columnWidths: [CGFloat] = [contentWidth * 0.3, contentWidth * 0.3, contentWidth * 0.4]
+        let spacingAboveSignature: CGFloat = 40
 
         let data = pdfRenderer.pdfData { context in
             context.beginPage()
@@ -79,18 +80,44 @@ import SwiftUI
                     currentY += rowHeight
                 }
             }
+
+            // Add space above the signature
+            currentY += spacingAboveSignature
+
+            // Add "Signature" label and image
+            let signatureLabel = "Signature"
+            let signatureAttributes: [NSAttributedString.Key: Any] = [
+                .font: UIFont.systemFont(ofSize: 14, weight: .medium)
+            ]
+            let labelWidth = (signatureLabel as NSString).size(withAttributes: signatureAttributes).width
+            let gap: CGFloat = 20
+
+            if let signatureImage = signature {
+                let scaleFactor: CGFloat = 0.3
+                let scaledWidth = signatureImage.size.width * scaleFactor
+                let scaledHeight = signatureImage.size.height * scaleFactor
+                let totalWidth = labelWidth + gap + scaledWidth
+
+                // Center align label and signature
+                let startX = (pageWidth - totalWidth) / 2
+                (signatureLabel as NSString).draw(at: CGPoint(x: startX, y: currentY), withAttributes: signatureAttributes)
+
+                let signatureX = startX + labelWidth + gap
+                let signatureY = currentY - scaledHeight / 2
+                signatureImage.draw(in: CGRect(x: signatureX, y: signatureY, width: scaledWidth, height: scaledHeight))
+            }
         }
 
         return data
     }
-    
+
     @objc public func savePDF(data: Data, fileName: String) -> URL? {
         let fileManager = FileManager.default
         guard let documentDirectory = fileManager.urls(for: .documentDirectory, in: .userDomainMask).first else {
             return nil
         }
         let fileURL = documentDirectory.appendingPathComponent("\(fileName).pdf")
-        
+
         do {
             try data.write(to: fileURL)
             return fileURL
@@ -99,6 +126,16 @@ import SwiftUI
             return nil
         }
     }
+
+    @objc public func byteArrayToUIImage(signature: [UInt8]?) -> UIImage? {
+          guard let signatureData = signature else { return nil }
+
+          // Convert ByteArray to NSData
+          let nsData = NSData(bytes: signatureData, length: signatureData.count)
+
+          // Create UIImage from NSData
+          return UIImage(data: nsData as Data)
+      }
 }