Add share and save cover actions (closes #3011)

app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaController.kt

@@ -76,7 +76,9 @@ import eu.kanade.tachiyomi.util.chapter.NoChaptersException
 import eu.kanade.tachiyomi.util.hasCustomCover
 import eu.kanade.tachiyomi.util.lang.launchIO
 import eu.kanade.tachiyomi.util.lang.launchUI
+import eu.kanade.tachiyomi.util.storage.getUriCompat
 import eu.kanade.tachiyomi.util.system.getResourceColor
+import eu.kanade.tachiyomi.util.system.toShareIntent
 import eu.kanade.tachiyomi.util.system.toast
 import eu.kanade.tachiyomi.util.view.getCoordinates
 import eu.kanade.tachiyomi.util.view.shrinkOnScroll
@@ -400,8 +402,11 @@ class MangaController :
             R.id.download_custom, R.id.download_unread, R.id.download_all
             -> downloadChapters(item.itemId)
 
+            R.id.action_share_cover -> shareCover()
+            R.id.action_save_cover -> saveCover()
+            R.id.action_edit_cover -> changeCover()
+
             R.id.action_edit_categories -> onCategoriesClick()
-            R.id.action_edit_cover -> handleChangeCover()
             R.id.action_migrate -> migrateManga()
         }
         return super.onOptionsItemSelected(item)
@@ -640,20 +645,35 @@ class MangaController :
         }
     }
 
-    private fun handleChangeCover() {
-        val manga = manga ?: return
-        if (manga.hasCustomCover(coverCache)) {
-            showEditCoverDialog(manga)
-        } else {
-            openMangaCoverPicker(manga)
+    private fun shareCover() {
+        try {
+            val activity = activity!!
+            val cover = presenter.shareCover(activity)
+            val uri = cover.getUriCompat(activity)
+            startActivity(Intent.createChooser(uri.toShareIntent(), activity.getString(R.string.action_share)))
+        } catch (e: Exception) {
+            Timber.e(e)
+            activity?.toast(R.string.error_sharing_cover)
         }
     }
 
-    /**
-     * Edit custom cover for selected manga.
-     */
-    private fun showEditCoverDialog(manga: Manga) {
-        ChangeMangaCoverDialog(this, manga).showDialog(router)
+    private fun saveCover() {
+        try {
+            presenter.saveCover(activity!!)
+            activity?.toast(R.string.cover_saved)
+        } catch (e: Exception) {
+            Timber.e(e)
+            activity?.toast(R.string.error_saving_cover)
+        }
+    }
+
+    private fun changeCover() {
+        val manga = manga ?: return
+        if (manga.hasCustomCover(coverCache)) {
+            ChangeMangaCoverDialog(this, manga).showDialog(router)
+        } else {
+            openMangaCoverPicker(manga)
+        }
     }
 
     override fun openMangaCoverPicker(manga: Manga) {

app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaPresenter.kt

@@ -35,6 +35,10 @@ import eu.kanade.tachiyomi.util.lang.withUIContext
 import eu.kanade.tachiyomi.util.prepUpdateCover
 import eu.kanade.tachiyomi.util.removeCovers
 import eu.kanade.tachiyomi.util.shouldDownloadNewChapters
+import eu.kanade.tachiyomi.util.storage.DiskUtil
+import eu.kanade.tachiyomi.util.storage.getPicturesDir
+import eu.kanade.tachiyomi.util.storage.getTempShareDir
+import eu.kanade.tachiyomi.util.system.ImageUtil
 import eu.kanade.tachiyomi.util.system.toast
 import eu.kanade.tachiyomi.util.updateCoverLastModified
 import eu.kanade.tachiyomi.widget.ExtendedNavigationView.Item.TriStateGroup.State
@@ -49,6 +53,7 @@ import rx.schedulers.Schedulers
 import timber.log.Timber
 import uy.kohesive.injekt.Injekt
 import uy.kohesive.injekt.api.get
+import java.io.File
 import java.util.Date
 
 class MangaPresenter(
@@ -275,6 +280,33 @@ class MangaPresenter(
         moveMangaToCategories(manga, listOfNotNull(category))
     }
 
+    fun shareCover(context: Context): File {
+        return saveCover(getTempShareDir(context))
+    }
+
+    fun saveCover(context: Context) {
+        saveCover(getPicturesDir(context))
+    }
+
+    private fun saveCover(directory: File): File {
+        val cover = coverCache.getCoverFile(manga) ?: throw Exception("Cover url was null")
+        if (!cover.exists()) throw Exception("Cover not in cache")
+        val type = ImageUtil.findImageType(cover.inputStream())
+            ?: throw Exception("Not an image")
+
+        directory.mkdirs()
+
+        val filename = DiskUtil.buildValidFilename("${manga.title}.${type.extension}")
+
+        val destFile = File(directory, filename)
+        cover.inputStream().use { input ->
+            destFile.outputStream().use { output ->
+                input.copyTo(output)
+            }
+        }
+        return destFile
+    }
+
     /**
      * Update cover with local file.
      *