[pixiv:novel] add 'covers' option (#5373)

docs/configuration.rst

@@ -2964,14 +2964,24 @@ Description
     `gppt <https://github.com/eggplants/get-pixivpy-token>`__.
 
 
-extractor.pixiv.embeds
-----------------------
+extractor.pixiv.novel.covers
+----------------------------
 Type
     ``bool``
 Default
     ``false``
 Description
-    Download images embedded in novels.
+    Download cover images.
+
+
+extractor.pixiv.novel.embeds
+----------------------------
+Type
+    ``bool``
+Default
+    ``false``
+Description
+    Download embedded images.
 
 
 extractor.pixiv.novel.full-series

gallery_dl/extractor/pixiv.py

@@ -619,6 +619,7 @@ class PixivNovelExtractor(PixivExtractor):
         meta_user = self.config("metadata")
         meta_bookmark = self.config("metadata-bookmark")
         embeds = self.config("embeds")
+        covers = self.config("covers")
 
         if embeds:
             headers = {
@@ -658,6 +659,19 @@ class PixivNovelExtractor(PixivExtractor):
             novel["extension"] = "txt"
             yield Message.Url, "text:" + content, novel
 
+            if covers:
+                path = novel["image_urls"]["large"].partition("/img/")[2]
+                url = ("https://i.pximg.net/novel-cover-original/img/" +
+                       path.rpartition(".")[0].replace("_master1200", ""))
+                novel["date_url"] = self._date_from_url(url)
+                novel["num"] += 1
+                novel["suffix"] = "_p{:02}".format(novel["num"])
+                novel["_fallback"] = (url + ".png",)
+                url_jpg = url + ".jpg"
+                text.nameext_from_url(url_jpg, novel)
+                yield Message.Url, url_jpg, novel
+                del novel["_fallback"]
+
             if embeds:
                 desktop = False
                 illusts = {}

test/results/pixiv.py

@@ -459,11 +459,14 @@ __tests__ = (
 
 {
     "#url"     : "https://www.pixiv.net/novel/show.php?id=16422450",
-    "#comment" : "embeds",
+    "#comment" : "embeds // covers (#5373)",
     "#category": ("", "pixiv", "novel"),
     "#class"   : pixiv.PixivNovelExtractor,
-    "#options" : {"embeds": True},
-    "#count"   : 3,
+    "#options" : {
+        "embeds": True,
+        "covers": True,
+    },
+    "#count"   : 4,
 },
 
 {