3 files changed, 67 insertions, 0 deletions
diff --git a/db/migrate/20220613110628_create_custom_filter_keywords.rb b/db/migrate/20220613110628_create_custom_filter_keywords.rb
new file mode 100644
index 000000000..353fc334f
--- /dev/null
+++ b/db/migrate/20220613110628_create_custom_filter_keywords.rb
@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+class CreateCustomFilterKeywords < ActiveRecord::Migration[6.1]
+  def change
+    create_table :custom_filter_keywords do |t|
+      t.belongs_to :custom_filter, foreign_key: { on_delete: :cascade }, null: false
+      t.text :keyword, null: false, default: ''
+      t.boolean :whole_word, null: false, default: true
+
+      t.timestamps
+    end
+  end
+end
diff --git a/db/migrate/20220613110711_migrate_custom_filters.rb b/db/migrate/20220613110711_migrate_custom_filters.rb
new file mode 100644
index 000000000..ea6a9b8c6
--- /dev/null
+++ b/db/migrate/20220613110711_migrate_custom_filters.rb
@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+class MigrateCustomFilters < ActiveRecord::Migration[6.1]
+  def up
+    # Preserve IDs as much as possible to not confuse existing clients.
+    # As long as this migration is irreversible, we do not have to deal with conflicts.
+    safety_assured do
+      execute <<-SQL.squish
+        INSERT INTO custom_filter_keywords (id, custom_filter_id, keyword, whole_word, created_at, updated_at)
+        SELECT id, id, phrase, whole_word, created_at, updated_at
+        FROM custom_filters
+      SQL
+    end
+  end
+
+  def down
+    # Copy back changes from custom filters guaranteed to be from the old API
+    safety_assured do
+      execute <<-SQL.squish
+        UPDATE custom_filters
+        SET phrase = custom_filter_keywords.keyword, whole_word = custom_filter_keywords.whole_word
+        FROM custom_filter_keywords
+        WHERE custom_filters.id = custom_filter_keywords.id AND custom_filters.id = custom_filter_keywords.custom_filter_id
+      SQL
+    end
+
+    # Drop every keyword as we can't safely provide a 1:1 mapping
+    safety_assured do
+      execute <<-SQL.squish
+        TRUNCATE custom_filter_keywords RESTART IDENTITY
+      SQL
+    end
+  end
+end
diff --git a/db/migrate/20220613110834_add_action_to_custom_filters.rb b/db/migrate/20220613110834_add_action_to_custom_filters.rb
new file mode 100644
index 000000000..9427a66fc
--- /dev/null
+++ b/db/migrate/20220613110834_add_action_to_custom_filters.rb
@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+require Rails.root.join('lib', 'mastodon', 'migration_helpers')
+
+class AddActionToCustomFilters < ActiveRecord::Migration[6.1]
+  include Mastodon::MigrationHelpers
+
+  disable_ddl_transaction!
+
+  def up
+    safety_assured do
+      add_column_with_default :custom_filters, :action, :integer, allow_null: false, default: 0
+      execute 'UPDATE custom_filters SET action = 1 WHERE irreversible IS TRUE'
+    end
+  end
+
+  def down
+    execute 'UPDATE custom_filters SET irreversible = (action = 1)'
+    remove_column :custom_filters, :action
+  end
+end