improve FixDateTaken, rescan paths missing from mediastore if necessary

app/src/main/kotlin/com/simplemobiletools/gallery/pro/extensions/Activity.kt

@@ -348,12 +348,13 @@ fun Activity.hasNavBar(): Boolean {
     return (realDisplayMetrics.widthPixels - displayMetrics.widthPixels > 0) || (realDisplayMetrics.heightPixels - displayMetrics.heightPixels > 0)
 }
 
-fun Activity.fixDateTaken(paths: ArrayList<String>, showToasts: Boolean, callback: (() -> Unit)? = null) {
+fun Activity.fixDateTaken(paths: ArrayList<String>, showToasts: Boolean, hasRescanned: Boolean = false, callback: (() -> Unit)? = null) {
     val BATCH_SIZE = 50
     if (showToasts) {
         toast(R.string.fixing)
     }
 
+    val pathsToRescan = ArrayList<String>()
     try {
         var didUpdateFile = false
         val operations = ArrayList<ContentProviderOperation>()
@@ -388,6 +389,10 @@ fun Activity.fixDateTaken(paths: ArrayList<String>, showToasts: Boolean, callbac
 
                 mediumDao.updateFavoriteDateTaken(path, timestamp)
                 didUpdateFile = true
+
+                if (!hasRescanned && getFileDateTaken(path) == 0L) {
+                    pathsToRescan.add(path)
+                }
             }
 
             val resultSize = contentResolver.applyBatch(MediaStore.AUTHORITY, operations).size
@@ -395,12 +400,18 @@ fun Activity.fixDateTaken(paths: ArrayList<String>, showToasts: Boolean, callbac
                 didUpdateFile = false
             }
 
-            runOnUiThread {
-                if (showToasts) {
-                    toast(if (didUpdateFile) R.string.dates_fixed_successfully else R.string.unknown_error_occurred)
-                }
+            if (hasRescanned || pathsToRescan.isEmpty()) {
+                runOnUiThread {
+                    if (showToasts) {
+                        toast(if (didUpdateFile) R.string.dates_fixed_successfully else R.string.unknown_error_occurred)
+                    }
 
-                callback?.invoke()
+                    callback?.invoke()
+                }
+            } else {
+                rescanPaths(pathsToRescan) {
+                    fixDateTaken(paths, showToasts, true)
+                }
             }
         }
     } catch (e: Exception) {

app/src/main/kotlin/com/simplemobiletools/gallery/pro/extensions/Context.kt

@@ -852,3 +852,27 @@ fun Context.updateDirectoryPath(path: String) {
     val directory = createDirectoryFromMedia(path, curMedia, albumCovers, hiddenString, includedFolders, isSortingAscending, getProperFileSize)
     updateDBDirectory(directory, galleryDB.DirectoryDao())
 }
+
+fun Context.getFileDateTaken(path: String): Long {
+    val projection = arrayOf(
+            MediaStore.Images.Media.DATE_TAKEN
+    )
+
+    val uri = MediaStore.Files.getContentUri("external")
+    val selection = "${MediaStore.Images.Media.DATA} = ?"
+    val selectionArgs = arrayOf(path)
+
+    val cursor = contentResolver.query(uri, projection, selection, selectionArgs, null)
+    cursor?.use {
+        if (cursor.moveToFirst()) {
+            do {
+                try {
+                    return cursor.getLongValue(MediaStore.Images.Media.DATE_TAKEN)
+                } catch (e: Exception) {
+                }
+            } while (cursor.moveToNext())
+        }
+    }
+
+    return 0L
+}