From 16f9a6667147ae402155c333fdd6ceb50f7bb7ec Mon Sep 17 00:00:00 2001
From: =?utf8?q?David=20=E2=80=98Bombe=E2=80=99=20Roden?=
 <bombe@pterodactylus.net>
Date: Fri, 29 Nov 2019 11:54:28 +0100
Subject: [PATCH] =?utf8?q?=E2=9C=A8=20Add=20helper=20methods=20for=20album?=
 =?utf8?q?s?=
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---
 .../kotlin/net/pterodactylus/sone/data/Albums.kt   | 23 +++++++++++
 .../net/pterodactylus/sone/data/AlbumsTest.kt      | 48 ++++++++++++++++++++++
 2 files changed, 71 insertions(+)
 create mode 100644 src/main/kotlin/net/pterodactylus/sone/data/Albums.kt
 create mode 100644 src/test/kotlin/net/pterodactylus/sone/data/AlbumsTest.kt

diff --git a/src/main/kotlin/net/pterodactylus/sone/data/Albums.kt b/src/main/kotlin/net/pterodactylus/sone/data/Albums.kt
new file mode 100644
index 0000000..f1c7d3b
--- /dev/null
+++ b/src/main/kotlin/net/pterodactylus/sone/data/Albums.kt
@@ -0,0 +1,23 @@
+/**
+ * Sone - Albums.kt - Copyright © 2019 David ‘Bombe’ Roden
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package net.pterodactylus.sone.data
+
+/** Returns all images contained in this album and all its albums. */
+val Album.allImages: Collection<Image>
+	get() =
+		images + albums.flatMap { it.allImages }
diff --git a/src/test/kotlin/net/pterodactylus/sone/data/AlbumsTest.kt b/src/test/kotlin/net/pterodactylus/sone/data/AlbumsTest.kt
new file mode 100644
index 0000000..9c06a5e
--- /dev/null
+++ b/src/test/kotlin/net/pterodactylus/sone/data/AlbumsTest.kt
@@ -0,0 +1,48 @@
+/**
+ * Sone - AlbumsTest.kt - Copyright © 2019 David ‘Bombe’ Roden
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package net.pterodactylus.sone.data
+
+import net.pterodactylus.sone.data.impl.*
+import org.hamcrest.MatcherAssert.*
+import org.hamcrest.Matchers.*
+import kotlin.test.*
+
+/**
+ * Unit test for various helper method in `Albums.kt`.
+ */
+class AlbumsTest {
+
+	@Test
+	fun `recursive list of all images for album is returned correctly`() {
+		val sone = IdOnlySone("sone")
+		val album = AlbumImpl(sone)
+		val firstNestedAlbum = AlbumImpl(sone)
+		val secondNestedAlbum = AlbumImpl(sone)
+		firstNestedAlbum.addImage(createImage(sone, "image-1"))
+		firstNestedAlbum.addImage(createImage(sone, "image-2"))
+		secondNestedAlbum.addImage(createImage(sone, "image-3"))
+		album.addImage(createImage(sone, "image-4"))
+		album.addAlbum(firstNestedAlbum)
+		album.addAlbum(secondNestedAlbum)
+		val images = album.allImages
+		assertThat(images.map(Image::id), containsInAnyOrder("image-1", "image-2", "image-3", "image-4"))
+	}
+
+	private fun createImage(sone: IdOnlySone, id: String) = ImageImpl(id).modify().setSone(sone).update()
+
+}
-- 
2.7.4