Store Matrix redaction state and ignore deletions of redacted messages

alembic/versions/7de69cf5809e_add_matrix_redaction_state_to_message_.py

@@ -0,0 +1,25 @@
+"""Add Matrix redaction state to message table
+
+Revision ID: 7de69cf5809e
+Revises: 888275d58e57
+Create Date: 2020-12-19 12:39:57.368568
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+# revision identifiers, used by Alembic.
+revision = '7de69cf5809e'
+down_revision = '888275d58e57'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    with op.batch_alter_table('message', schema=None) as batch_op:
+        batch_op.add_column(sa.Column('redacted', sa.Boolean(), server_default=sa.false(), nullable=True))
+
+
+def downgrade():
+    with op.batch_alter_table('message', schema=None) as batch_op:
+        batch_op.drop_column('redacted')