1 files changed, 61 insertions, 0 deletions
diff --git a/gallery_dl/extractor/chan.py b/gallery_dl/extractor/chan.py
new file mode 100644
index 0000000..5e44fd9
--- /dev/null
+++ b/gallery_dl/extractor/chan.py
@@ -0,0 +1,61 @@
+# -*- coding: utf-8 -*-
+
+# Copyright 2015-2019 Mike Fährmann
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+
+"""Base classes for extractors for different Futaba Channel-like boards"""
+
+from .common import Extractor, Message
+from .. import text
+
+
+class ChanThreadExtractor(Extractor):
+    """Base class for extractors for Futaba Channel-like boards"""
+    category = "chan"
+    subcategory = "thread"
+    directory_fmt = ("{category}", "{board}", "{thread} - {title}")
+    filename_fmt = "{tim}-{filename}.{extension}"
+    archive_fmt = "{board}_{thread}_{tim}"
+    api_url = ""
+    file_url = ""
+
+    def __init__(self, match):
+        Extractor.__init__(self, match)
+        self.metadata = {
+            "board": match.group(1),
+            "thread": match.group(2),
+        }
+
+    def items(self):
+        yield Message.Version, 1
+        url = self.api_url.format_map(self.metadata)
+        posts = self.request(url).json()["posts"]
+        self.metadata["title"] = self.get_thread_title(posts[0])
+        yield Message.Directory, self.metadata
+        for post in posts:
+            if "filename" not in post:
+                continue
+            self.update(post)
+            yield Message.Url, self.build_url(post), post
+            if "extra_files" in post:
+                for file in post["extra_files"]:
+                    self.update(post, file)
+                    yield Message.Url, self.build_url(post), post
+
+    def update(self, post, data=None):
+        """Update keyword dictionary"""
+        post.update(data or self.metadata)
+        post["extension"] = post["ext"][1:]
+
+    def build_url(self, post):
+        """Construct an image url out of a post object"""
+        return self.file_url.format_map(post)
+
+    @staticmethod
+    def get_thread_title(post):
+        """Return thread title from first post"""
+        title = post["sub"] if "sub" in post else text.remove_html(post["com"])
+        return text.unescape(title)[:50]