Add classes to simplify table migration and manipulation for upgrades

gems/houdini_upgrade/lib/houdini_upgrade/column_to_migrate.rb

@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+# License: AGPL-3.0-or-later WITH Web-Template-Output-Additional-Permission-3.0-or-later
+module HoudiniUpgrade
+    class ColumnToMigrate
+        attr_reader :name
+        def initialize(original_column_name)
+            @name = original_column_name.to_s
+        end
+
+        def migrated_name
+            @name + "_temp"
+        end
+    end
+end

gems/houdini_upgrade/lib/houdini_upgrade/table_to_migrate.rb

@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+# License: AGPL-3.0-or-later WITH Web-Template-Output-Additional-Permission-3.0-or-later
+require_relative "./column_to_migrate"
+module HoudiniUpgrade
+    class TableToMigrate
+        attr_reader :fields, :name
+        def initialize(original_table_name, original_field_names)
+            @name = original_table_name.to_s
+            @fields = original_field_names.map{|i| ColumnToMigrate.new(i)}
+        end
+
+        def class_name
+            @name.classify
+        end
+
+        def backup_table
+            @name + "_uploader_backups"
+        end
+
+        def foreign_key
+            @name + "_id"
+        end
+    end
+end