notify user of slow compression methods

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

@@ -3,12 +3,19 @@ package eu.kanade.tachiyomi.util.storage
 import eu.kanade.tachiyomi.util.lang.compareToCaseInsensitiveNaturalOrder
 import org.apache.commons.compress.archivers.dump.UnsupportedCompressionAlgorithmException
 import org.apache.commons.compress.archivers.sevenz.SevenZFile
+import org.apache.commons.compress.archivers.sevenz.SevenZMethod
 import tachiyomi.core.util.system.ImageUtil
 import java.io.IOException
 import java.io.InputStream
 
 object SevenZUtil {
-    fun SevenZFile.getImages(): Sequence<ByteArray> {
+    private val GoodMethods = arrayOf(
+        SevenZMethod.LZMA2,
+        SevenZMethod.DEFLATE,
+        SevenZMethod.COPY,
+    )
+
+    fun SevenZFile.getImages(notifySlowArchives: (method: String) -> Unit): Sequence<ByteArray> {
         return generateSequence {
             try {
                 getNextEntry()
@@ -16,6 +23,11 @@ object SevenZUtil {
                 throw UnsupportedCompressionAlgorithmException()
             }
         }.filter { !it.isDirectory && ImageUtil.isImage(it.name) { getInputStream(it) } }
+            .onEachIndexed { i, it ->
+                if (i > 0) return@onEachIndexed
+                val method = it.contentMethods.first().method
+                if(method !in GoodMethods) notifySlowArchives(method.name)
+            }
             .sortedWith { f1, f2 -> f1.name.compareToCaseInsensitiveNaturalOrder(f2.name) }
             .map(::getInputStream)
             .map { it.use(InputStream::readBytes) } // ByteArray