Added support for http callbacks on processing

Sends an HTTP POST request back to an URL given on submission to the API
submit view.

mediagoblin/db/sql/migrations.py

@@ -20,7 +20,8 @@ from sqlalchemy import (MetaData, Table, Column, Boolean, SmallInteger,
                         Integer, Unicode, UnicodeText, DateTime, ForeignKey)
 
 from mediagoblin.db.sql.util import RegisterMigration
-from mediagoblin.db.sql.models import MediaEntry, Collection, User
+from mediagoblin.db.sql.models import MediaEntry, Collection, User, \
+        ProcessingMetaData
 
 MIGRATIONS = {}
 
@@ -101,3 +102,9 @@ def add_mediaentry_collected(db_conn):
     col = Column('collected', Integer, default=0)
     col.create(media_entry)
     db_conn.commit()
+
+
+@RegisterMigration(6, MIGRATIONS)
+def create_processing_metadata_table(db):
+    ProcessingMetaData.__table__.create(db.bind)
+    db.commit()

mediagoblin/db/sql/models.py

@@ -412,9 +412,24 @@ class CollectionItem(Base, CollectionItemMixin):
         return DictReadAttrProxy(self)
 
 
+class ProcessingMetaData(Base):
+    __tablename__ = 'core__processing_metadata'
+
+    id = Column(Integer, primary_key=True)
+    media_entry_id = Column(Integer, ForeignKey(MediaEntry.id), nullable=False,
+            index=True)
+    media_entry = relationship(MediaEntry, backref='processing_metadata')
+    callback_url = Column(Unicode)
+
+    @property
+    def dict_view(self):
+        """A dict like view on this object"""
+        return DictReadAttrProxy(self)
+
+
 MODELS = [
     User, MediaEntry, Tag, MediaTag, MediaComment, Collection, CollectionItem, MediaFile, FileKeynames,
-    MediaAttachmentFile]
+    MediaAttachmentFile, ProcessingMetaData]
 
 
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