feat(dsi): paginate channels and enforce posting settings

Add channel pagination, reject missing channels and apply guest-posting and upload-size settings.

hatenadir/ds/v2-xx/ch.py

@@ -1,8 +1,9 @@
+import html
 from twisted.web import resource
 
 from DB import Database
 from hatena import NotFound, as_text, client_ip
-from reximemo import current_account, dialog, dsi_url, flipnote_buttons, html_page, make_menu
+from reximemo import dialog, dsi_text_html, dsi_url, flipnote_buttons, html_page, make_menu, page_number, pagination_buttons, posting_account, read_ppm_upload
 
 
 class PyResource(resource.Resource):
@@ -26,25 +27,36 @@ class ChannelResource(resource.Resource):
 
     def render_GET(self, request):
         channel = Database.get_channel(self.channel_id)
+        if not channel:
+            return NotFound.render(request)
         if self.ext in {"ugo", "uls"}:
-            rows = Database.list_flipnotes(channel_id=self.channel_id, limit=50)
+            total = Database.count_flipnotes(channel_id=self.channel_id)
+            page = page_number(request, total)
+            rows = Database.list_flipnotes(channel_id=self.channel_id, page=page, per_page=50)
+            pager = pagination_buttons(request, f"ch/{self.channel_id}.uls", page, total)
+            prev = [item for item in pager if item["label"].startswith("Previous")]
+            nxt = [item for item in pager if item["label"].startswith("Next")]
             request.setHeader(b"content-type", b"text/plain")
             return make_menu(
                 layout=(2,1), title=channel["title"], subtitle_top="Channel", subtitle_bottom=channel["description"],
-                left="Flipnotes", right=str(Database.count_flipnotes(channel_id=self.channel_id)),
-                buttons=flipnote_buttons(request, rows), corner={"label":"Post", "url":dsi_url(request, f"ch/{self.channel_id}.post")},
+                left="Flipnotes", right=str(total),
+                buttons=prev + flipnote_buttons(request, rows) + nxt, corner={"label":"Post", "url":dsi_url(request, f"ch/{self.channel_id}.post")},
             )
         if self.ext == "htm":
-            return html_page(request, channel["title"], '<div class="title">%s</div><p>%s</p><p><a href="%s">Browse</a></p>' % (channel["title"], channel["description"], dsi_url(request, f"ch/{self.channel_id}.uls")))
+            return html_page(request, channel["title"], '<div class="title">%s</div><p>%s</p><p><a href="%s">Browse</a></p>' % (dsi_text_html(channel["title"]), dsi_text_html(channel["description"], preserve_newlines=True), html.escape(dsi_url(request, f"ch/{self.channel_id}.uls"), quote=True)))
         request.setResponseCode(405); return b""
 
     def render_POST(self, request):
         if self.ext != "post":
             request.setResponseCode(405); return b""
-        data = request.content.read()
-        account = current_account(request)
+        account, denied = posting_account(request)
+        if denied is not None:
+            return denied
         try:
+            data = read_ppm_upload(request)
             result = Database.AddFlipnote(data, str(self.channel_id), account["id"] if account else None, client_ip(request))
+        except ValueError as exc:
+            return dialog(request, str(exc))
         except Exception:
             result = False
         if not result: