fix storing item Favorite state

app/src/main/kotlin/com/simplemobiletools/gallery/activities/ViewPagerActivity.kt

@@ -72,6 +72,7 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
     private var mStoredReplaceZoomableImages = false
     private var mStoredBottomActions = true
     private var mMediaFiles = ArrayList<Medium>()
+    private var mFavoritePaths = ArrayList<String>()
 
     companion object {
         var screenWidth = 0
@@ -95,6 +96,7 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
 
         storeStateVariables()
         initBottomActions()
+        initFavorites()
     }
 
     @TargetApi(Build.VERSION_CODES.LOLLIPOP)
@@ -259,6 +261,12 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
         initBottomActionButtons()
     }
 
+    private fun initFavorites() {
+        Thread {
+            mFavoritePaths = galleryDB.MediumDao().getFavorites() as ArrayList<String>
+        }.start()
+    }
+
     private fun setupRotation() {
         if (mIsOrientationLocked) {
             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
@@ -274,6 +282,7 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
     override fun onCreateOptionsMenu(menu: Menu): Boolean {
         menuInflater.inflate(R.menu.menu_viewpager, menu)
         val currentMedium = getCurrentMedium() ?: return true
+        currentMedium.isFavorite = mFavoritePaths.contains(currentMedium.path)
 
         menu.apply {
             findItem(R.id.menu_delete).isVisible = !config.bottomActions
@@ -775,8 +784,17 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
     }
 
     private fun toggleFavorite() {
-        getCurrentMedium()!!.isFavorite = !getCurrentMedium()!!.isFavorite
+        val medium = getCurrentMedium() ?: return
+        medium.isFavorite = !medium.isFavorite
+        Thread {
+            galleryDB.MediumDao().updateFavorite(medium.path, medium.isFavorite)
+            if (medium.isFavorite) {
+                mFavoritePaths.add(medium.path)
+            } else {
+                mFavoritePaths.remove(medium.path)
+            }
             invalidateOptionsMenu()
+        }.start()
     }
 
     override fun onActivityResult(requestCode: Int, resultCode: Int, resultData: Intent?) {

app/src/main/kotlin/com/simplemobiletools/gallery/helpers/MediaFetcher.kt

@@ -6,10 +6,7 @@ import android.net.Uri
 import android.provider.MediaStore
 import com.simplemobiletools.commons.extensions.*
 import com.simplemobiletools.commons.helpers.*
-import com.simplemobiletools.gallery.extensions.config
+import com.simplemobiletools.gallery.extensions.*
-import com.simplemobiletools.gallery.extensions.getDistinctPath
-import com.simplemobiletools.gallery.extensions.getOTGFolderChildren
-import com.simplemobiletools.gallery.extensions.shouldFolderBeVisible
 import com.simplemobiletools.gallery.models.Medium
 import java.io.File
 
@@ -162,6 +159,7 @@ class MediaFetcher(val context: Context) {
         val doExtraCheck = context.config.doExtraCheck
         val showHidden = context.config.shouldShowHidden
         val dateTakens = if (getProperDateTaken) getFolderDateTakens(folder) else HashMap()
+        val favoritePaths = context.galleryDB.MediumDao().getFavorites()
 
         for (file in files) {
             if (shouldStop) {
@@ -210,7 +208,9 @@ class MediaFetcher(val context: Context) {
                 else -> TYPE_RAWS
             }
 
-            val medium = Medium(null, filename, file.absolutePath, folder, lastModified, dateTaken, size, type, false)
+            val path = file.absolutePath
+            val isFavorite = favoritePaths.contains(path)
+            val medium = Medium(null, filename, path, folder, lastModified, dateTaken, size, type, isFavorite)
             media.add(medium)
         }
         return media
@@ -221,6 +221,7 @@ class MediaFetcher(val context: Context) {
         val files = context.getDocumentFile(folder)?.listFiles() ?: return media
         val doExtraCheck = context.config.doExtraCheck
         val showHidden = context.config.shouldShowHidden
+        val favoritePaths = context.galleryDB.MediumDao().getFavorites()
 
         for (file in files) {
             if (shouldStop) {
@@ -266,7 +267,8 @@ class MediaFetcher(val context: Context) {
             }
 
             val path = Uri.decode(file.uri.toString().replaceFirst("${context.config.OTGTreeUri}/document/${context.config.OTGPartition}%3A", OTG_PATH))
-            val medium = Medium(null, filename, path, folder, dateModified, dateTaken, size, type, false)
+            val isFavorite = favoritePaths.contains(path)
+            val medium = Medium(null, filename, path, folder, dateModified, dateTaken, size, type, isFavorite)
             media.add(medium)
         }
 

app/src/main/kotlin/com/simplemobiletools/gallery/interfaces/MediumDao.kt

@@ -11,6 +11,9 @@ interface MediumDao {
     @Query("SELECT filename, full_path, parent_path, last_modified, date_taken, size, type, is_favorite FROM media WHERE parent_path = :path")
     fun getMediaFromPath(path: String): List<Medium>
 
+    @Query("SELECT full_path FROM media WHERE is_favorite = 1")
+    fun getFavorites(): List<String>
+
     @Insert(onConflict = REPLACE)
     fun insert(medium: Medium)
 
@@ -22,4 +25,7 @@ interface MediumDao {
 
     @Query("UPDATE OR REPLACE media SET filename = :newFilename, full_path = :newFullPath, parent_path = :newParentPath WHERE full_path = :oldPath")
     fun updateMedium(oldPath: String, newParentPath: String, newFilename: String, newFullPath: String)
+
+    @Query("UPDATE media SET is_favorite = :isFavorite WHERE full_path = :path")
+    fun updateFavorite(path: String, isFavorite: Boolean)
 }