Fix image picker conversions

package.json

@@ -232,6 +232,7 @@
     "@testing-library/jest-native": "5.4.1",
     "@testing-library/react-native": "11.5.1",
     "@trivago/prettier-plugin-sort-imports": "^4.2.0",
+    "@types/base-64": "^1.0.2",
     "@types/canvas-size": "^1.2.2",
     "@types/concurrently": "^7.0.0",
     "@types/jest": "^29.5.2",

src/CONST.ts

@@ -74,6 +74,12 @@ const onboardingChoices = {
 type OnboardingPurposeType = ValueOf<typeof onboardingChoices>;
 
 const CONST = {
+    HEIC_SIGNATURES: [
+        '6674797068656963', // 'ftypheic' - Indicates standard HEIC file
+        '6674797068656978', // 'ftypheix' - Indicates a variation of HEIC
+        '6674797068657631', // 'ftyphevc' - Typically for HEVC encoded media (common in HEIF)
+        '667479706d696631', // 'ftypmif1' - Multi-Image Format part of HEIF, broader usage
+    ],
     RECENT_WAYPOINTS_NUMBER: 20,
     DEFAULT_DB_NAME: 'OnyxDB',
     DEFAULT_TABLE_NAME: 'keyvaluepairs',

src/components/AttachmentPicker/index.native.tsx

@@ -1,11 +1,12 @@
 import {Str} from 'expensify-common';
+import {manipulateAsync, SaveFormat} from 'expo-image-manipulator';
 import React, {useCallback, useMemo, useRef, useState} from 'react';
 import {Alert, View} from 'react-native';
 import RNFetchBlob from 'react-native-blob-util';
 import RNDocumentPicker from 'react-native-document-picker';
 import type {DocumentPickerOptions, DocumentPickerResponse} from 'react-native-document-picker';
 import {launchImageLibrary} from 'react-native-image-picker';
-import type {Asset, Callback, CameraOptions, ImagePickerResponse} from 'react-native-image-picker';
+import type {Asset, Callback, CameraOptions, ImageLibraryOptions, ImagePickerResponse} from 'react-native-image-picker';
 import ImageSize from 'react-native-image-size';
 import type {FileObject, ImagePickerResponse as FileResponse} from '@components/AttachmentModal';
 import * as Expensicons from '@components/Icon/Expensicons';
@@ -41,11 +42,12 @@ type Item = {
  * See https://github.com/react-native-image-picker/react-native-image-picker/#options
  * for ImagePicker configuration options
  */
-const imagePickerOptions = {
+const imagePickerOptions: Partial<CameraOptions | ImageLibraryOptions> = {
     includeBase64: false,
     saveToPhotos: false,
     selectionLimit: 1,
     includeExtra: false,
+    assetRepresentationMode: 'current',
 };
 
 /**
@@ -158,12 +160,42 @@ function AttachmentPicker({type = CONST.ATTACHMENT_PICKER_TYPE.FILE, children, s
                         return reject(new Error(`Error during attachment selection: ${response.errorMessage}`));
                     }
 
-                    return resolve(response.assets);
+                    const targetAsset = response.assets?.[0];
+                    const targetAssetUri = targetAsset?.uri;
+
+                    if (!targetAssetUri) {
+                        return resolve();
+                    }
+
+                    if (targetAsset?.type?.startsWith('image')) {
+                        FileUtils.verifyFileFormat({fileUri: targetAssetUri, formatSignatures: CONST.HEIC_SIGNATURES})
+                            .then((isHEIC) => {
+                                // react-native-image-picker incorrectly changes file extension without transcoding the HEIC file, so we are doing it manually if we detect HEIC signature
+                                if (isHEIC && targetAssetUri) {
+                                    manipulateAsync(targetAssetUri, [], {format: SaveFormat.JPEG})
+                                        .then((manipResult) => {
+                                            const convertedAsset = {
+                                                uri: manipResult.uri,
+                                                type: 'image/jpeg',
+                                                width: manipResult.width,
+                                                height: manipResult.height,
+                                            };
+
+                                            return resolve([convertedAsset]);
+                                        })
+                                        .catch((err) => reject(err));
+                                } else {
+                                    return resolve(response.assets);
+                                }
+                            })
+                            .catch((err) => reject(err));
+                    } else {
+                        return resolve(response.assets);
+                    }
                 });
             }),
         [showGeneralAlert, type],
     );
-
     /**
      * Launch the DocumentPicker. Results are in the same format as ImagePicker
      *

src/libs/fileDownload/FileUtils.ts

@@ -256,6 +256,24 @@ function validateImageForCorruption(file: FileObject): Promise<{width: number; h
     });
 }
 
+/** Verify file format based on the magic bytes of the file - some formats might be identified by multiple signatures */
+function verifyFileFormat({fileUri, formatSignatures}: {fileUri: string; formatSignatures: readonly string[]}) {
+    return fetch(fileUri)
+        .then((file) => file.arrayBuffer())
+        .then((arrayBuffer) => {
+            const uintArray = new Uint8Array(arrayBuffer, 4, 12);
+
+            const hexString = Array.from(uintArray)
+                .map((b) => b.toString(16).padStart(2, '0'))
+                .join('');
+
+            return hexString;
+        })
+        .then((hexSignature) => {
+            return formatSignatures.some((signature) => hexSignature.startsWith(signature));
+        });
+}
+
 function isLocalFile(receiptUri?: string | number): boolean {
     if (!receiptUri) {
         return false;
@@ -318,6 +336,7 @@ export {
     isImage,
     getFileResolution,
     isHighResolutionImage,
+    verifyFileFormat,
     getImageDimensionsAfterResize,
     resizeImageIfNeeded,
 };