Provider Statistics added.

Rates command added with a test.

Updated to include added migration.

migrations/versions/0005_add_provider_stats.py

@@ -0,0 +1,44 @@
+"""empty message
+
+Revision ID: 0005_add_provider_stats
+Revises: 0003_add_service_history
+Create Date: 2016-04-20 15:13:42.229197
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '0005_add_provider_stats'
+down_revision = '0004_notification_stats_date'
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+def upgrade():
+    ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('provider_rates',
+    sa.Column('id', postgresql.UUID(as_uuid=True), nullable=False),
+    sa.Column('valid_from', sa.DateTime(), nullable=False),
+    sa.Column('provider', sa.Enum('mmg', 'twilio', 'firetext', 'ses', name='providers'), nullable=False),
+    sa.Column('rate', sa.Numeric(), nullable=False),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_table('provider_statistics',
+    sa.Column('id', postgresql.UUID(as_uuid=True), nullable=False),
+    sa.Column('day', sa.Date(), nullable=False),
+    sa.Column('provider', sa.Enum('mmg', 'twilio', 'firetext', 'ses', name='providers'), nullable=False),
+    sa.Column('service_id', postgresql.UUID(as_uuid=True), nullable=False),
+    sa.Column('unit_count', sa.BigInteger(), nullable=False),
+    sa.ForeignKeyConstraint(['service_id'], ['services.id'], ),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_provider_statistics_service_id'), 'provider_statistics', ['service_id'], unique=False)
+    ### end Alembic commands ###
+
+
+def downgrade():
+    ### commands auto generated by Alembic - please adjust! ###
+    op.drop_index(op.f('ix_provider_statistics_service_id'), table_name='provider_statistics')
+    op.drop_table('provider_statistics')
+    op.drop_table('provider_rates')
+    ### end Alembic commands ###