Changing the downloads folder naming AGAIN

This time folders are named just the chapter, or scanlator_chapterName if there's a scanlator

Migrations now needs a rename to set the chapters from the new to the new new  format

app/src/main/java/eu/kanade/tachiyomi/Migrations.kt

@@ -1,5 +1,6 @@
 package eu.kanade.tachiyomi
 
+import eu.kanade.tachiyomi.data.download.DownloadProvider
 import eu.kanade.tachiyomi.data.library.LibraryUpdateJob
 import eu.kanade.tachiyomi.data.preference.PreferencesHelper
 import eu.kanade.tachiyomi.data.preference.getOrDefault
@@ -60,6 +61,8 @@ object Migrations {
                     }
                 }
             }
+            if (oldVersion < 54)
+                DownloadProvider(context).renameChaapters()
             return true
         }
         return false

app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadCache.kt

@@ -121,7 +121,7 @@ class DownloadCache(
     /**
      * Renews the downloads cache.
      */
-    private fun renew() {
+    fun renew() {
         val onlineSources = sourceManager.getOnlineSources()
 
         val sourceDirs = rootDir.dir.listFiles()

app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadProvider.kt

@@ -4,11 +4,13 @@ import android.content.Context
 import android.net.Uri
 import com.hippo.unifile.UniFile
 import eu.kanade.tachiyomi.R
+import eu.kanade.tachiyomi.data.database.DatabaseHelper
 import eu.kanade.tachiyomi.data.database.models.Chapter
 import eu.kanade.tachiyomi.data.database.models.Manga
 import eu.kanade.tachiyomi.data.preference.PreferencesHelper
 import eu.kanade.tachiyomi.data.preference.getOrDefault
 import eu.kanade.tachiyomi.source.Source
+import eu.kanade.tachiyomi.source.SourceManager
 import eu.kanade.tachiyomi.util.DiskUtil
 import uy.kohesive.injekt.injectLazy
 
@@ -97,7 +99,37 @@ class DownloadProvider(private val context: Context) {
      */
     fun findChapterDirs(chapters: List<Chapter>, manga: Manga, source: Source): List<UniFile> {
         val mangaDir = findMangaDir(manga, source) ?: return emptyList()
-        return chapters.flatMap { getValidChapterDirNames(it) }.mapNotNull { mangaDir.findFile(it) }
+        return chapters.mapNotNull { chp ->
+            getValidChapterDirNames(chp).mapNotNull { mangaDir.findFile(it) }.firstOrNull()
+        }
+    }
+
+    /**
+     * Renames the chapter folders with id's and removes it + null scanlators
+     *
+     * @param chapters the chapters to query.
+     * @param manga the manga of the chapter.
+     * @param source the source of the chapter.
+     */
+    fun renameChaapters() {
+        val db by injectLazy<DatabaseHelper>()
+        val sourceManager by injectLazy<SourceManager>()
+        val mangas = db.getLibraryMangas().executeAsBlocking()
+        mangas.forEach sfor@{ manga ->
+            val sourceId = manga.source
+            val source = sourceManager.get(sourceId) ?: return@sfor
+            val mangaDir = findMangaDir(manga, source) ?: return@sfor
+            mangaDir.listFiles()?.forEach {
+                val nameSplit = it.name?.split("_")?.toMutableList() ?: return@sfor
+                if (nameSplit.size > 2 && nameSplit.first().first().isDigit()) {
+                    nameSplit.removeAt(0)
+                    val newName = nameSplit.joinToString("_").removePrefix("null_")
+                    it.renameTo(newName)
+                }
+            }
+        }
+        val cache = DownloadCache(context, this, sourceManager)
+        cache.renew()
     }
 
     /**
@@ -157,7 +189,10 @@ class DownloadProvider(private val context: Context) {
      * @param chapter the chapter to query.
      */
     fun getChapterDirName(chapter: Chapter): String {
-        return DiskUtil.buildValidFilename("${chapter.id}_${chapter.scanlator}_${chapter.name}")
+        return DiskUtil.buildValidFilename(
+            if (chapter.scanlator != null) "${chapter.scanlator}_${chapter.name}"
+            else chapter.name
+        )
     }
 
     /**

app/src/main/java/eu/kanade/tachiyomi/ui/main/MainActivity.kt

@@ -9,7 +9,6 @@ import android.graphics.Color
 import android.graphics.Rect
 import android.os.Build
 import android.os.Bundle
-import android.util.Log
 import android.view.MotionEvent
 import android.view.View
 import android.view.ViewGroup
@@ -63,7 +62,6 @@ import kotlinx.android.synthetic.main.main_activity.*
 import kotlinx.coroutines.delay
 import timber.log.Timber
 import uy.kohesive.injekt.injectLazy
-import java.lang.Exception
 import java.util.Date
 
 class MainActivity : BaseActivity() {