Upgrade to Pylons 1.0. #283

[zzz-spline-frontpage.git] / splinext / frontpage / controllers / frontpage.py

diff --git a/splinext/frontpage/controllers/frontpage.py b/splinext/frontpage/controllers/frontpage.py
index 478c367..c9f779a 100644 (file)
--- a/splinext/frontpage/controllers/frontpage.py
+++ b/splinext/frontpage/controllers/frontpage.py
@@ -1,15 +1,15 @@
-from collections import defaultdict
+import datetime
 import logging
-import re
 
 from pylons import config, request, response, session, tmpl_context as c, url
-from pylons.controllers.util import abort, redirect_to
+from pylons.controllers.util import abort, redirect
 from routes import request_config
 from sqlalchemy.orm.exc import NoResultFound
 
 from spline.lib import helpers as h
 from spline.lib.base import BaseController, render
-from spline.lib.plugin.load import run_hooks
+from spline.model import meta
+from splinext.frontpage.sources import max_age_to_datetime
 
 log = logging.getLogger(__name__)
 
@@ -26,8 +26,13 @@ class FrontPageController(BaseController):
 
         Hook handlers should return a list of FrontPageUpdate objects.
 
-        Standard hook parameters are `limit`, the maximum number of items that
-        should ever be returned.
+        Standard hook parameters are:
+        `limit`, the maximum number of items that should ever be returned.
+        `max_age`, the number of seconds after which items expire.
+        `title`, a name for the source.
+        `icon`, an icon to show next to its name.
+
+        `limit` and `max_age` are also global options.
 
         Updates are configured in the .ini like so:
 
@@ -40,49 +45,59 @@ class FrontPageController(BaseController):
 
             run_hooks('frontpage_updates_updatetype', opt1=val1, opt2=val2)
 
-        Standard options are not shown and take precedence over whatever's in
-        the config file.
-
         Local plugins can override the fairly simple index.mako template to
         customize the front page layout.
         """
-        # XXX no reason to do this on the fly; cache it on server startup
-        update_config = defaultdict(dict)  # source_name => config
-        key_rx = re.compile(
-            '(?x) ^ spline-frontpage [.] sources [.] (\w+) (?: [.] (\w+) )? $')
-        for key, val in config.iteritems():
-            match = key_rx.match(key)
-            if not match:
-                continue
-
-            source_name, subkey = match.groups()
-            if not subkey:
-                # This is the type declaration; use a special key
-                subkey = '__type__'
-
-            update_config[source_name][subkey] = val
-
-
-        global_config = dict(
-            limit = 10,
-        )
 
-        # Ask plugins to deal with this stuff for us!
         updates = []
-        for source, source_config in update_config.iteritems():
-            source_config2 = source_config.copy()
-            hook_name = 'frontpage_updates_' + source_config2.pop('__type__')
-            source_config2.update(global_config)
-
-            # Hooks should return a list of FrontPageUpdate objects, making this
-            # return value a list of lists
-            updates_lol = run_hooks(hook_name, **source_config2)
-            updates += sum(updates_lol, [])
-
-        # Sort everything by descending time, then crop to the right number of
-        # items
-        updates.sort(key=lambda obj: obj.time)
-        updates.reverse()
-        c.updates = updates[:global_config['limit']]
+        global_limit = config['spline-frontpage.limit']
+        global_max_age = max_age_to_datetime(
+            config['spline-frontpage.max_age'])
+
+        c.sources = config['spline-frontpage.sources']
+        for source in c.sources:
+            new_updates = source.poll(global_limit, global_max_age)
+            updates.extend(new_updates)
+
+            # Little optimization: once there are global_limit items, anything
+            # older than the oldest cannot possibly make it onto the list.  So,
+            # bump global_max_age to that oldest time if this is ever the case.
+            updates.sort(key=lambda obj: obj.time, reverse=True)
+            del updates[global_limit:]
+
+            if updates and len(updates) == global_limit:
+                global_max_age = updates[-1].time
+
+        # Find the oldest unseen item, to draw a divider after it.
+        # If this stays as None, the divider goes at the top
+        c.last_seen_item = None
+        # Could have a timestamp in the stash if this is a user, or in a cookie
+        # if this session has ever been logged out...
+        times = []
+        for source in (c.user.stash, request.cookies):
+            try:
+                times.append( int(source['frontpage-last-seen-time']) )
+            except (KeyError, ValueError):
+                pass
+
+        if times:
+            last_seen_time = datetime.datetime.fromtimestamp(max(times))
+            for update in updates:
+                if update.time > last_seen_time:
+                    c.last_seen_item = update
+                else:
+                    break
+
+        # Save ~now~ as the last-seen time
+        now = datetime.datetime.now().strftime('%s')
+        if c.user:
+            c.user.stash['frontpage-last-seen-time'] = now
+            meta.Session.add(c.user)
+            meta.Session.commit()
+        else:
+            response.set_cookie('frontpage-last-seen-time', now)
+
+        # Done!  Feed to template
+        c.updates = updates
 
         return render('/index.mako')