[sankaku] add article extractor (#258)

docs/supportedsites.rst

@@ -86,7 +86,7 @@ Reddit               https://www.reddit.com/             individual Images, Subm
 rule #34             https://rule34.paheal.net/          Posts, Tag-Searches
 Rule 34              https://rule34.xxx/                 Pools, Posts, Tag-Searches
 Safebooru            https://safebooru.org/              Pools, Posts, Tag-Searches
-Sankaku Channel      https://chan.sankakucomplex.com/    Pools, Posts, Tag-Searches                         Optional
+Sankaku Channel      https://chan.sankakucomplex.com/    Articles, Pools, Posts, Tag-Searches               Optional
 Sen Manga            https://raw.senmanga.com/           Chapters
 Sense-Scans          http://sensescans.com/reader/       Chapters, Manga
 Sex.com              https://www.sex.com/                Boards, Pins, Search Results

gallery_dl/extractor/sankaku.py

@@ -297,3 +297,72 @@ class SankakuPostExtractor(SankakuExtractor):
 
     def get_posts(self):
         return (self.post_id,)
+
+
+class SankakuArticleExtractor(Extractor):
+    """Extractor for articles on www.sankakucomplex.com"""
+    category = "sankaku"
+    subcategory = "article"
+    directory_fmt = ("{category}", "Articles", "{date:%Y-%m-%d} {title}")
+    filename_fmt = "{filename}.{extension}"
+    archive_fmt = "a_{date:%Y%m%d}_{filename}"
+    pattern = (r"(?:https?://)?www\.sankakucomplex\.com"
+               r"/(\d{4}/\d\d/\d\d)/([^/?&#]+)")
+    test = (
+        ("https://www.sankakucomplex.com/2019/05/11/twitter-cosplayers", {
+            "url": "4a9ecc5ae917fbce469280da5b6a482510cae84d",
+            "keyword": "4ab96f31df9ee95d0dc6eefc2ca4e508c45c8e00",
+        }),
+        ("https://www.sankakucomplex.com/2009/12/01/sexy-goddesses-of-2ch", {
+            "url": "a1e249173fd6c899a8134fcfbd9c925588a63f7c",
+            "keyword": "a7876de642bf3e68fb4743dcd4d4e8778f2c17ab",
+        }),
+    )
+    root = "https://www.sankakucomplex.com"
+
+    def __init__(self, match):
+        Extractor.__init__(self, match)
+        self.date, self.title = match.groups()
+
+    def items(self):
+        url = "{}/{}/{}/?pg=X".format(self.root, self.date, self.title)
+        extr = text.extract_from(self.request(url).text)
+        data = {
+            "title"      : text.unescape(
+                extr('"og:title" content="', '"')),
+            "description": text.unescape(
+                extr('"og:description" content="', '"')),
+            "date"       : text.parse_datetime(
+                extr('"og:updated_time" content="', '"')),
+        }
+        imgs = self.images(extr)
+        data["count"] = len(imgs)
+        data["tags"] = text.split_html(extr('="meta-tags">', '</div>'))[::2]
+
+        yield Message.Directory, data
+        for img in imgs:
+            img.update(data)
+            yield Message.Url, img["url"], img
+
+    def images(self, extr):
+        num = 0
+        imgs = []
+        urls = set()
+        orig = re.compile(r"-\d+x\d+\.")
+
+        extr('<div class="entry-content">', '')
+        while True:
+            url = extr('data-lazy-src="', '"')
+            if not url:
+                return imgs
+            if url in urls:
+                continue
+            if url[0] == "/":
+                url = text.urljoin(self.root, url)
+            url = orig.sub(".", url)
+            num += 1
+            imgs.append(text.nameext_from_url(url, {
+                "url"   : url,
+                "num"   : num,
+            }))
+            urls.add(url)