Merge remote branch 'remotes/jwandborg/feature_400-resize_images_to_fit_page'

Conflicts:
	mediagoblin/db/migrations.py
	mediagoblin/db/models.py
	mediagoblin/process_media/__init__.py
	mediagoblin/templates/mediagoblin/user_pages/media.html
	mediagoblin/util.py

mediagoblin/db/models.py

@@ -21,7 +21,11 @@ from mongokit import Document
 from mediagoblin import util
 from mediagoblin.auth import lib as auth_lib
 from mediagoblin import mg_globals
+from mediagoblin.db import migrations
 from mediagoblin.db.util import ASCENDING, DESCENDING, ObjectId
+from mediagoblin.util import Pagination
+from mediagoblin.util import DISPLAY_IMAGE_FETCHING_ORDER
+
 
 ###################
 # Custom validators
@@ -108,6 +112,24 @@ class MediaEntry(Document):
         return self.db.MediaComment.find({
                 'media_entry': self['_id']}).sort('created', DESCENDING)
 
+    def get_display_media(self, media_map, fetch_order=DISPLAY_IMAGE_FETCHING_ORDER):
+        """
+        Find the best media for display.
+
+        Args:
+        - media_map: a dict like
+          {u'image_size': [u'dir1', u'dir2', u'image.jpg']}
+        - fetch_order: the order we should try fetching images in
+
+        Returns:
+        (media_size, media_path)
+        """
+        media_sizes = media_map.keys()
+
+        for media_size in DISPLAY_IMAGE_FETCHING_ORDER:
+            if media_size in media_sizes:
+                return media_map[media_size]
+
     def main_mediafile(self):
         pass