Update default templates and add update command (#166)

This commit adds config_files for default data and, using that, creates a new way to update our default templates without needing to hardcode a migration.

---------

Co-authored-by: Ryan Ahearn <ryan.ahearn@gsa.gov>

migrations/versions/0383_update_default_templates.py

@@ -0,0 +1,55 @@
+"""
+
+Revision ID: 0383_update_default_templates.py
+Revises: 0382_remove_old_providers
+Create Date: 2023-01-10 11:42:25.633265
+
+"""
+import json
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+from flask import current_app
+
+revision = '0383_update_default_templates.py'
+down_revision = '0382_remove_old_providers'
+
+
+def upgrade():
+    update = """
+        UPDATE {} SET name = '{}', template_type = '{}', content = '{}', subject = '{}'
+        WHERE id = '{}'
+    """
+
+    with open(current_app.config['CONFIG_FILES'] + '/templates.json') as f:
+        data = json.load(f)
+        for d in data:
+            for table_name in 'templates', 'templates_history':
+                op.execute(
+                    update.format(
+                        table_name,
+                        d['name'],
+                        d['type'],
+                        '\n'.join(d['content']),
+                        d.get('subject'),
+                        d['id']
+                    )
+                )
+
+            # op.execute(
+            #     """
+            #     INSERT INTO template_redacted
+            #     (
+            #         template_id,
+            #         redact_personalisation,
+            #         updated_at,
+            #         updated_by_id
+            #     ) VALUES ( '{}', false, current_timestamp, '{}' )
+            #     """.format(d['id'], current_app.config['NOTIFY_USER_ID'])
+            # )
+   
+
+def downgrade():
+    # with associated code changes, edits to templates should no longer be made via migration.
+    # instead, update the fixture and run the flask command to update.
+    pass