Remove storage permissions

Requires adjusting some file reading to first copy to a temporary file
in cache that we have permissions to read from. This is only applicable for things
like ZIP files where we need an actual File rather than just some Android content
URI shenanigans.

core/src/main/java/eu/kanade/tachiyomi/util/storage/EpubFile.kt

@@ -1,9 +1,7 @@
 package eu.kanade.tachiyomi.util.storage
 
-import com.hippo.unifile.UniFile
 import org.jsoup.Jsoup
 import org.jsoup.nodes.Document
-import tachiyomi.core.storage.toFile
 import java.io.Closeable
 import java.io.File
 import java.io.InputStream
@@ -13,12 +11,12 @@ import java.util.zip.ZipFile
 /**
  * Wrapper over ZipFile to load files in epub format.
  */
-class EpubFile(file: UniFile) : Closeable {
+class EpubFile(file: File) : Closeable {
 
     /**
      * Zip file of this epub.
      */
-    private val zip = ZipFile(file.toFile())
+    private val zip = ZipFile(file)
 
     /**
      * Path separator used by this epub.

core/src/main/java/tachiyomi/core/storage/UniFileExtensions.kt

@@ -1,6 +1,10 @@
 package tachiyomi.core.storage
 
+import android.content.Context
+import android.os.Build
+import android.os.FileUtils
 import com.hippo.unifile.UniFile
+import java.io.BufferedOutputStream
 import java.io.File
 
 val UniFile.extension: String?
@@ -9,4 +13,26 @@ val UniFile.extension: String?
 val UniFile.nameWithoutExtension: String?
     get() = name?.substringBeforeLast('.')
 
-fun UniFile.toFile(): File? = filePath?.let { File(it) }
+fun UniFile.toTempFile(context: Context): File {
+    val inputStream = context.contentResolver.openInputStream(uri)!!
+    val tempFile = File.createTempFile(
+        nameWithoutExtension.orEmpty(),
+        null,
+    )
+
+    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+        FileUtils.copy(inputStream, tempFile.outputStream())
+    } else {
+        BufferedOutputStream(tempFile.outputStream()).use { tmpOut ->
+            inputStream.use { input ->
+                val buffer = ByteArray(8192)
+                var count: Int
+                while (input.read(buffer).also { count = it } > 0) {
+                    tmpOut.write(buffer, 0, count)
+                }
+            }
+        }
+    }
+
+    return tempFile
+}