Fetch thumbnails from cbz

app/src/main/java/org/koitharu/kotatsu/KotatsuApp.kt

@@ -11,6 +11,7 @@ import org.koin.android.ext.koin.androidLogger
 import org.koin.core.context.startKoin
 import org.koin.dsl.module
 import org.koitharu.kotatsu.core.db.MangaDatabase
+import org.koitharu.kotatsu.core.local.CbzFetcher
 import org.koitharu.kotatsu.core.local.PagesCache
 import org.koitharu.kotatsu.core.prefs.AppSettings
 import org.koitharu.kotatsu.domain.MangaLoaderContext
@@ -61,6 +62,9 @@ class KotatsuApp : Application() {
 					.cache(CoilUtils.createDefaultCache(applicationContext))
 					.build()
 			}
+			componentRegistry {
+				add(CbzFetcher())
+			}
 		})
 	}
 

app/src/main/java/org/koitharu/kotatsu/core/local/CbzFetcher.kt

@@ -0,0 +1,37 @@
+package org.koitharu.kotatsu.core.local
+
+import android.net.Uri
+import android.webkit.MimeTypeMap
+import coil.bitmappool.BitmapPool
+import coil.decode.DataSource
+import coil.decode.Options
+import coil.fetch.FetchResult
+import coil.fetch.Fetcher
+import coil.fetch.SourceResult
+import coil.size.Size
+import okio.buffer
+import okio.source
+import java.util.zip.ZipFile
+
+class CbzFetcher : Fetcher<Uri> {
+
+	override suspend fun fetch(
+		pool: BitmapPool,
+		data: Uri,
+		size: Size,
+		options: Options
+	): FetchResult {
+		val zip = ZipFile(data.schemeSpecificPart)
+		val entry = zip.getEntry(data.fragment)
+		val ext = MimeTypeMap.getFileExtensionFromUrl(entry.name)
+		return SourceResult(
+			source = zip.getInputStream(entry).source().buffer(),
+			mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(ext),
+			dataSource = DataSource.DISK
+		)
+	}
+
+	override fun key(data: Uri): String? = data.toString()
+
+	override fun handles(data: Uri) = data.scheme == "cbz"
+}

app/src/main/java/org/koitharu/kotatsu/core/parser/LocalMangaRepository.kt

@@ -90,5 +90,5 @@ class LocalMangaRepository(loaderContext: MangaLoaderContext) : BaseMangaReposit
 	}
 
 	private fun zipUri(file: File, entryName: String) =
-		Uri.fromParts("zip", file.path, entryName).toString()
+		Uri.fromParts("cbz", file.path, entryName).toString()
 }

app/src/main/java/org/koitharu/kotatsu/domain/local/MangaIndex.kt

@@ -69,7 +69,7 @@ class MangaIndex(source: String?) {
 			jo.put("url", chapter.url)
 			jo.put("name", chapter.name)
 			jo.put("entries", "%03d\\d{3}".format(chapter.number))
-			chapters.put(chapter.number.toString(), jo)
+			chapters.put(chapter.id.toString(), jo)
 		}
 	}