fix(dialog): `open` function return mismatch (#1056)

* Implemented conversion of URI to a file path

* Added relevant .changes file

.changes/dialog-path-return-mismatch.md

@@ -0,0 +1,5 @@
+---
+"dialog": "patch"
+---
+
+Fixed an issue where dialogs on android would return the Content URI instead of the file path

plugins/dialog/android/src/main/java/DialogPlugin.kt

@@ -141,7 +141,7 @@ class DialogPlugin(private val activity: Activity): Plugin(activity) {
         fileResult.put("modifiedAt", modifiedAt)
       }
       fileResult.put("name", FilePickerUtils.getNameFromUri(activity, uri))
-      fileResult.put("path", FilePickerUtils.getPathFromUri(uri))
+      fileResult.put("path", FilePickerUtils.getPathFromUri(activity, uri))
       fileResult.put("size", FilePickerUtils.getSizeFromUri(activity, uri))
       filesResultList.add(fileResult)
     }

plugins/dialog/android/src/main/java/FilePickerUtils.kt

@@ -4,10 +4,15 @@
 
 package app.tauri.dialog
 
+
+import android.content.ContentUris
+import android.database.Cursor
+import android.provider.MediaStore
 import android.content.Context
 import android.graphics.BitmapFactory
 import android.media.MediaMetadataRetriever
 import android.net.Uri
+import android.os.Environment
 import android.provider.DocumentsContract
 import android.provider.OpenableColumns
 import android.util.Base64
@@ -21,8 +26,40 @@ class FilePickerUtils {
   class FileResolution(var height: Int, var width: Int)
 
   companion object {
-    fun getPathFromUri(uri: Uri): String {
-      return uri.toString()
+    fun getPathFromUri(context: Context, uri: Uri): String? {
+      if (DocumentsContract.isDocumentUri(context, uri)) {
+        if (isExternalStorageDocument(uri)) {
+          val docId = DocumentsContract.getDocumentId(uri)
+          val split = docId.split(":")
+          return if ("primary".equals(split[0], ignoreCase = true)) {
+            "${Environment.getExternalStorageDirectory()}/${split[1]}"
+          } else {
+            null
+          }
+        } else if (isDownloadsDocument(uri)) {
+          val id = DocumentsContract.getDocumentId(uri)
+          val contentUri = ContentUris.withAppendedId(
+            Uri.parse("content://downloads/public_downloads"), java.lang.Long.valueOf(id))
+          return getDataColumn(context, contentUri, null, null)
+        } else if (isMediaDocument(uri)) {
+          val docId = DocumentsContract.getDocumentId(uri)
+          val split = docId.split(":")
+          val contentUri: Uri? = when (split[0]) {
+            "image" -> MediaStore.Images.Media.EXTERNAL_CONTENT_URI
+            "video" -> MediaStore.Video.Media.EXTERNAL_CONTENT_URI
+            "audio" -> MediaStore.Audio.Media.EXTERNAL_CONTENT_URI
+            else -> null
+          }
+          val selection = "_id=?"
+          val selectionArgs = arrayOf(split[1])
+          return getDataColumn(context, contentUri, selection, selectionArgs)
+        }
+      } else if ("content".equals(uri.scheme, ignoreCase = true)) {
+        return getDataColumn(context, uri, null, null)
+      } else if ("file".equals(uri.scheme, ignoreCase = true)) {
+        return uri.path
+      }
+      return null
     }
 
     fun getNameFromUri(context: Context, uri: Uri): String? {
@@ -36,7 +73,7 @@ class FilePickerUtils {
         displayName = cursor.getString(columnIdx)
         cursor.close()
       }
-      if (displayName == null || displayName.isEmpty()) {
+      if (displayName.isNullOrEmpty()) {
         displayName = uri.lastPathSegment
       }
       return displayName
@@ -162,4 +199,32 @@ class FilePickerUtils {
       return os.toByteArray()
     }
   }
-}
+}
+
+private fun getDataColumn(context: Context, uri: Uri?, selection: String?, selectionArgs: Array<String>?): String? {
+  var cursor: Cursor? = null
+  val column = "_data"
+  val projection = arrayOf(column)
+  try {
+    cursor = context.contentResolver.query(uri!!, projection, selection, selectionArgs, null)
+    if (cursor != null && cursor.moveToFirst()) {
+      val columnIndex = cursor.getColumnIndexOrThrow(column)
+      return cursor.getString(columnIndex)
+    }
+  } finally {
+    cursor?.close()
+  }
+  return null
+}
+
+private fun isExternalStorageDocument(uri: Uri): Boolean {
+  return "com.android.externalstorage.documents" == uri.authority
+}
+
+private fun isDownloadsDocument(uri: Uri): Boolean {
+  return "com.android.providers.downloads.documents" == uri.authority
+}
+
+private fun isMediaDocument(uri: Uri): Boolean {
+  return "com.android.providers.media.documents" == uri.authority
+}