Convert source modules to Kotlin Multiplatform (#9172)

Use KMP in source modules 


Use KMP in source-api


Expect LocalSource

source-local/src/androidMain/kotlin/tachiyomi/source/local/io/LocalSourceFileSystem.kt

@@ -0,0 +1,39 @@
+package tachiyomi.source.local.io
+
+import android.content.Context
+import eu.kanade.tachiyomi.util.storage.DiskUtil
+import tachiyomi.source.local.R
+import java.io.File
+
+actual class LocalSourceFileSystem(
+    private val context: Context,
+) {
+
+    private val baseFolderLocation = "${context.getString(R.string.app_name)}${File.separator}local"
+
+    actual fun getBaseDirectories(): Sequence<File> {
+        return DiskUtil.getExternalStorages(context)
+            .map { File(it.absolutePath, baseFolderLocation) }
+            .asSequence()
+    }
+
+    actual fun getFilesInBaseDirectories(): Sequence<File> {
+        return getBaseDirectories()
+            // Get all the files inside all baseDir
+            .flatMap { it.listFiles().orEmpty().toList() }
+    }
+
+    actual fun getMangaDirectory(name: String): File? {
+        return getFilesInBaseDirectories()
+            // Get the first mangaDir or null
+            .firstOrNull { it.isDirectory && it.name == name }
+    }
+
+    actual fun getFilesInMangaDirectory(name: String): Sequence<File> {
+        return getFilesInBaseDirectories()
+            // Filter out ones that are not related to the manga and is not a directory
+            .filter { it.isDirectory && it.name == name }
+            // Get all the files inside the filtered folders
+            .flatMap { it.listFiles().orEmpty().toList() }
+    }
+}