Merge remote branch 'remotes/hanaku/pagination'

Conflicts:
	mediagoblin/user_pages/views.py

7 files changed, 192 insertions, 16 deletions

diff --git a/mediagoblin/decorators.py b/mediagoblin/decorators.py
index 1774ce4e..161d99ff 100644
--- a/mediagoblin/decorators.py
+++ b/mediagoblin/decorators.py
@@ -44,3 +44,22 @@ def require_active_login(controller):
         return controller(request, *args, **kwargs)
 
     return _make_safe(new_controller_func, controller)
+
+
+def uses_pagination(controller):
+    """
+    Check request GET 'page' key for wrong values
+    """
+    def wrapper(request, *args, **kwargs):
+        try:
+            page = int(request.str_GET['page'])
+            if page < 0:
+                return exc.HTTPNotFound()
+        except ValueError:
+            return exc.HTTPNotFound()
+        except KeyError:
+            request.str_GET['page'] = 1
+
+        return controller(request, *args, **kwargs)    
+
+    return _make_safe(wrapper,controller)
diff --git a/mediagoblin/templates/mediagoblin/root.html b/mediagoblin/templates/mediagoblin/root.html
index e2b2730a..a93a7c75 100644
--- a/mediagoblin/templates/mediagoblin/root.html
+++ b/mediagoblin/templates/mediagoblin/root.html
@@ -53,4 +53,4 @@
     </ul>
   </div>
 
-{% endblock %}    
+{% endblock %}
diff --git a/mediagoblin/templates/mediagoblin/user_pages/user.html b/mediagoblin/templates/mediagoblin/user_pages/user.html
index 5c8692fc..d1809e80 100644
--- a/mediagoblin/templates/mediagoblin/user_pages/user.html
+++ b/mediagoblin/templates/mediagoblin/user_pages/user.html
@@ -20,17 +20,10 @@
   {% if user %}
     <h1>User page for '{{ user.username }}'</h1>
 
-    {#- Should we outsource such a media 'gallery' view to it's own file?
-        It could be useful for the home page and other views too -#}
     <ul>
-      {%- for entry in media_entries %}
-      <li>
-        <a href="{{ request.urlgen('mediagoblin.user_pages.media_home',
-                 user= entry.uploader.username, m_id= entry._id) }}">
-          <img src="{{ request.app.public_store.file_url(
-                    entry['media_files']['thumb']) }}" /></a>
-      </li>
-      {%- endfor %}
+      
+      {% include "mediagoblin/utils/object_gallery.html" %}
+
     </ul>
   {% else %}
     {# This *should* not occur as the view makes sure we pass in a user. #}
diff --git a/mediagoblin/templates/mediagoblin/utils/object_gallery.html b/mediagoblin/templates/mediagoblin/utils/object_gallery.html
new file mode 100644
index 00000000..8ae337f5
--- /dev/null
+++ b/mediagoblin/templates/mediagoblin/utils/object_gallery.html
@@ -0,0 +1,36 @@
+{#
+# GNU MediaGoblin -- federated, autonomous media hosting
+# Copyright (C) 2011 Free Software Foundation, Inc
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#}
+
+{% block object_gallery_content -%}
+  <div>
+    {% if media_entries %}
+      <ul>
+        {% for entry in media_entries %}
+          <li>
+            <a href="{{ request.urlgen('mediagoblin.user_pages.media_home',
+                 user= entry.uploader.username, m_id= entry._id) }}">
+            <img src="{{ request.app.public_store.file_url(
+		   entry['media_files']['thumb']) }}" /></a>
+          </li>
+        {% endfor %}
+      </ul>
+      {% include "mediagoblin/utils/pagination.html" %}
+    {%  endif %}
+
+  </div>
+{% endblock %}    
diff --git a/mediagoblin/templates/mediagoblin/utils/pagination.html b/mediagoblin/templates/mediagoblin/utils/pagination.html
new file mode 100644
index 00000000..b74cbfcf
--- /dev/null
+++ b/mediagoblin/templates/mediagoblin/utils/pagination.html
@@ -0,0 +1,47 @@
+{# GNU MediaGoblin -- federated, autonomous media hosting
+# Copyright (C) 2011 Free Software Foundation, Inc
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#}
+
+{# only display if {{pagination}} is defined #}
+
+{% if pagination %}
+  <div class=pagination>
+
+      {% if pagination.has_prev %}
+        <a href={{ pagination.get_page_url(request.path_info, 
+	           pagination.page-1, request.GET) }}>&laquo; Prev</>
+      {% endif %}
+
+      {%- for page in pagination.iter_pages() %}
+        {% if page %}
+          {% if page != pagination.page %}
+	    <a href={{ pagination.get_page_url(request.path_info, 
+                      page, request.GET) }}>{{ page }}</a>
+          {% else %}
+            <strong>{{ page }}</strong>
+          {% endif %}
+        {% else %}
+          <span class=ellipsis>…</span>
+        {% endif %}
+      {%- endfor %}
+
+      {% if pagination.has_next %}
+        <a href={{ pagination.get_page_url(request.path_info,  
+                   pagination.page+1, request.GET) }}>Next &raquo;</a>
+      {% endif %}
+   </div>
+{% endif %}
+
diff --git a/mediagoblin/user_pages/views.py b/mediagoblin/user_pages/views.py
index 9e9e3f51..d8665915 100644
--- a/mediagoblin/user_pages/views.py
+++ b/mediagoblin/user_pages/views.py
@@ -16,8 +16,11 @@
 
 from webob import Response, exc
 from mediagoblin.db.util import ObjectId, DESCENDING
+from mediagoblin.util import Pagination
 
+from mediagoblin.decorators import uses_pagination
 
+@uses_pagination
 def user_home(request):
     """'Homepage' of a User()"""
     user = request.db.User.find_one({
@@ -26,18 +29,27 @@ def user_home(request):
     if not user:
         return exc.HTTPNotFound()
 
-    medias = request.db.MediaEntry.find({
-            'uploader': user,
-            'state': 'processed'}).sort('created', DESCENDING)
+    cursor = request.db.MediaEntry \
+                .find({'uploader': user, 'state': 'processed'}) \
+               .sort('created', DESCENDING)
+    
 
+    pagination = Pagination( int(request.str_GET['page']), cursor)
+    media_entries = pagination()
+
+    #if no data is available, return NotFound
+    if media_entries == None:
+        return exc.HTTPNotFound()
+    
     template = request.template_env.get_template(
         'mediagoblin/user_pages/user.html')
+
     return Response(
         template.render(
             {'request': request,
              'user': user,
-             'media_entries': medias}))
-
+             'media_entries': media_entries,
+             'pagination': pagination}))
 
 def media_home(request):
     """'Homepage' of a MediaEntry()"""
@@ -56,3 +68,4 @@ def media_home(request):
         template.render(
             {'request': request,
              'media': media}))
+
diff --git a/mediagoblin/util.py b/mediagoblin/util.py
index 680ff62e..b05aad1d 100644
--- a/mediagoblin/util.py
+++ b/mediagoblin/util.py
@@ -26,6 +26,11 @@ import translitcodec
 
 from mediagoblin import globals as mgoblin_globals
 
+import urllib
+from math import ceil
+import copy
+import decorators
+from webob import exc
 
 TESTS_ENABLED = False
 def _activate_testing():
@@ -290,3 +295,66 @@ def setup_gettext(locale):
 
     mgoblin_globals.setup_globals(
         translations=this_gettext)
+
+
+class Pagination(object):
+    """
+    Pagination class,
+    initialization through __init__(self, cursor, page=1, per_page=2):
+    get actual data slice through __call__()
+    """
+
+    def __init__(self, page, cursor, per_page=2):
+        """
+        initializes Pagination
+        -- page,       requested page
+        -- per_page,   number of objects per page
+        -- cursor,     db cursor 
+        """
+        self.page = page    
+        self.per_page = per_page
+        self.cursor = cursor
+        self.total_count = self.cursor.count()
+
+    def __call__(self):
+        """
+        returns slice of objects for the requested page
+        """
+        return self.cursor.skip((self.page-1)*self.per_page) \
+                          .limit(self.per_page)
+
+    @property
+    def pages(self):
+        return int(ceil(self.total_count / float(self.per_page)))
+
+    @property
+    def has_prev(self):
+        return self.page > 1
+
+    @property
+    def has_next(self):
+        return self.page < self.pages
+
+    def iter_pages(self, left_edge=2, left_current=2,
+                   right_current=5, right_edge=2):
+        last = 0
+        for num in xrange(1, self.pages + 1):
+            if num <= left_edge or \
+               (num > self.page - left_current - 1 and \
+                num < self.page + right_current) or \
+               num > self.pages - right_edge:
+                if last + 1 != num:
+                    yield None
+                yield num
+                last = num
+
+    def get_page_url(self, path_info, page_no, get_params=None):
+        """ 
+        Get a new page based of the path_info, the new page number,
+        and existing get parameters.
+        """ 
+        new_get_params = copy.copy(get_params or {})
+        new_get_params['page'] = page_no
+        return "%s?%s" % (
+            path_info, urllib.urlencode(new_get_params))
+