fix(images): fix second pasted image replaces the first one

Fixes #9966

Uses the validate function to paste images so that it concatenates the previous images.
FIxes the validate function to also accept data images.
Moves the size validation function to Utils to reuse the data path prefix constant and fix the possible crash when we try to get the size of a data image.

ui/app/mainui/panels/DropAreaPanel.qml

@@ -32,7 +32,7 @@ DropArea {
         }
 
         // needed because drag.urls is not a normal js array
-        rptDraggedPreviews.model = drag.urls.filter(img => Utils.hasDragNDropImageExtension(img))
+        rptDraggedPreviews.model = drag.urls.filter(img => Utils.isValidDragNDropImage(img))
     }
     onPositionChanged: {
         rptDraggedPreviews.x = drag.x

ui/imports/shared/status/StatusChatImageExtensionValidator.qml

@@ -15,7 +15,7 @@ StatusChatImageValidator {
     onImagesChanged: {
         let isValid = true
         root.validImages = images.filter(img => {
-            const isImage = Utils.hasDragNDropImageExtension(img)
+            const isImage = Utils.isValidDragNDropImage(img)
             isValid = isValid && isImage
             return isImage
         })

ui/imports/shared/status/StatusChatImageSizeValidator.qml

@@ -4,13 +4,11 @@ import utils 1.0
 
 StatusChatImageValidator {
     id: root
-    readonly property int maxImgSizeBytes: Constants.maxUploadFilesizeMB * 1048576 /* 1 MB in bytes */
 
     onImagesChanged: {
         let isValid = true
         root.validImages = images.filter(img => {
-            let size = parseInt(globalUtils.getFileSize(img))
-            const isSmallEnough = size <= maxImgSizeBytes
+            const isSmallEnough = Utils.isFilesizeValid(img)
             isValid = isValid && isSmallEnough
             return isSmallEnough
         })

ui/imports/shared/status/StatusChatInput.qml

@@ -436,7 +436,7 @@ Rectangle {
         if (event.matches(StandardKey.Paste)) {
             if (QClipboardProxy.hasImage) {
                 const clipboardImage = QClipboardProxy.imageBase64
-                showImageArea([clipboardImage])
+                validateImagesAndShowImageArea([clipboardImage])
                 event.accepted = true
             } else if (QClipboardProxy.hasText) {
                 messageInputField.remove(messageInputField.selectionStart, messageInputField.selectionEnd)
@@ -883,11 +883,22 @@ Rectangle {
 
     function showImageArea(imagePathsOrData) {
         isImage = true;
-
         imageArea.imageSource = imagePathsOrData
         control.fileUrlsAndSources = imageArea.imageSource
     }
 
+    // Use this to validate and show the images. The concatanation of previous selected images is done automatically
+    // Returns true if the images were valid and added
+    function validateImagesAndShowImageArea(imagePaths) {
+        const validImages = validateImages(imagePaths)
+
+        if (validImages.length > 0) {
+            showImageArea(validImages)
+            return true
+        }
+        return false
+    }
+
     function showReplyArea(messageId, userName, message, contentType, image, sticker) {
         isReply = true
         replyArea.userName = userName
@@ -908,9 +919,7 @@ Rectangle {
         target: Global.dragArea
         ignoreUnknownSignals: true
         function onDroppedOnValidScreen(drop) {
-            let validImages = validateImages(drop.urls)
-            if (validImages.length > 0) {
-                showImageArea(validImages)
+            if (validateImagesAndShowImageArea(drop.urls)) {
                 drop.acceptProposedAction()
             }
         }
@@ -918,10 +927,7 @@ Rectangle {
 
     // This is used by Squish tests to not have to access the file dialog
     function selectImageString(filePath) {
-        let validImages = validateImages([filePath])
-        if (validImages.length > 0) {
-            control.showImageArea(validImages)
-        }
+        validateImagesAndShowImageArea([filePath])
         messageInputField.forceActiveFocus();
     }
 
@@ -935,10 +941,7 @@ Rectangle {
         ]
         onAccepted: {
             imageBtn.highlighted = false
-            let validImages = validateImages(imageDialog.fileUrls)
-            if (validImages.length > 0) {
-                control.showImageArea(validImages)
-            }
+            validateImagesAndShowImageArea(imageDialog.fileUrls)
             messageInputField.forceActiveFocus();
         }
         onRejected: {

ui/imports/utils/Constants.qml

@@ -797,6 +797,7 @@ QtObject {
 
     readonly property int maxNumberOfPins: 3
 
+    readonly property string dataImagePrefix: "data:image"
     readonly property var acceptedImageExtensions: [".png", ".jpg", ".jpeg", ".svg", ".gif"]
     readonly property var acceptedDragNDropImageExtensions: [".png", ".jpg", ".jpeg", ".heif", ".tif", ".tiff"]
 

ui/imports/utils/Utils.qml

@@ -10,6 +10,8 @@ QtObject {
     property var mainModuleInst: typeof mainModule !== "undefined" ? mainModule : null
     property var globalUtilsInst: typeof globalUtils !== "undefined" ? globalUtils : null
 
+    readonly property int maxImgSizeBytes: Constants.maxUploadFilesizeMB * 1048576 /* 1 MB in bytes */
+
     function isDigit(value) {
       return /^\d$/.test(value);
     }
@@ -320,8 +322,18 @@ QtObject {
         return message.replace(/(?:https?|ftp):\/\/[\n\S]*(\.gif)+/gm, '');
     }
 
-    function hasDragNDropImageExtension(url) {
-        return Constants.acceptedDragNDropImageExtensions.some(ext => url.toLowerCase().includes(ext))
+    function isValidDragNDropImage(url) {
+        let lowerCaseUrl = url.toLowerCase()
+        return Constants.acceptedDragNDropImageExtensions.some(ext => lowerCaseUrl.endsWith(ext)) ||
+            lowerCaseUrl.startsWith(Constants.dataImagePrefix);
+    }
+
+    function isFilesizeValid(img) {
+        if (img.startsWith(Constants.dataImagePrefix)) {
+            return img.length < maxImgSizeBytes
+        }
+        let size = parseInt(globalUtils.getFileSize(img))
+        return size <= maxImgSizeBytes
     }
 
     function deduplicate(array) {