Started work on migration script for old database

oldDBMigration.sql

@@ -0,0 +1,40 @@
+/*
+Migrates the pre-refactor database of april 2020 to database verion 1
+
+rename all tables to table_old
+run version 1 population script
+filter, copy change data
+*/
+
+INSERT INTO DBPREFIXsections (id, name, abbreviation, position, hidden)
+SELECT id, name, abbreviation, list_order, hidden > 0
+FROM DBPREFIXsections_old;
+
+INSERT INTO DBPREFIXboards (
+	id, 
+	section_id, 
+	uri, 
+	dir, 
+	navbar_position,
+	title,
+	subtitle,
+	description,
+	max_file_size,
+	max_threads,
+	default_style,
+	locked,
+	created_at,
+	anonymous_name,
+	force_anonymous,
+	autosage_after,
+	no_images_after,
+	max_message_length,
+	min_message_length,
+	allow_embeds,
+	redirect_to_thread,
+	require_file,
+	enable_catalog)
+SELECT id, section, dir, dir, list_order, title, subtitle, description, max_file_size, 1000,
+default_style, locked, created_on, anonymous, forced_anon, autosage_after, no_images_after, max_message_length, 0, embeds_allowed, 
+redirect_to_thread, require_file, enable_catalog
+FROM DBPREFIXboards_old;

pkg/gcsql/connect.go

@@ -69,8 +69,11 @@ func initDB(initFile string) *gcutil.GcError {
 		return gcutil.NewError(fmt.Sprintf(
 			"SQL database initialization file (%s) missing. Please reinstall gochan", initFile), false)
 	}
+	return runSQLFile(filePath)
+}
 
-	sqlBytes, err := ioutil.ReadFile(filePath)
+func runSQLFile(path string) *gcutil.GcError {
+	sqlBytes, err := ioutil.ReadFile(path)
 	if err != nil {
 		return gcutil.FromError(err, false)
 	}

pkg/gcsql/queries.go

@@ -1056,3 +1056,15 @@ func doesGochanPrefixTableExist() (bool, *gcutil.GcError) {
 	}
 	return count > 0, nil
 }
+
+func renameTable(tablename string, tableNameNew string) *gcutil.GcError {
+	var sql = "ALTER TABLE DBPREFIX" + tablename + " RENAME TO DBPREFIX" + tableNameNew
+	_, err := ExecSQL(sql)
+	return err
+}
+
+func dropTable(tablename string) *gcutil.GcError {
+	var sql = "DROP TABLE DBPREFIX" + tablename
+	_, err := ExecSQL(sql)
+	return err
+}

pkg/gcsql/versioning.go

@@ -39,7 +39,7 @@ func handleVersioning(dbType string) *gcutil.GcError {
 		return err
 	}
 	if isOldDesign {
-		return migratePreApril2020Database()
+		return migratePreApril2020Database(dbType)
 	}
 	//No old or current database versioning tables found.
 	if config.Config.DBprefix != "" {
@@ -96,8 +96,35 @@ func versionHandler(foundDatabaseVersion int) *gcutil.GcError {
 
 }
 
-func migratePreApril2020Database() *gcutil.GcError {
+func migratePreApril2020Database(dbType string) *gcutil.GcError {
-	return notImplemented
+	var tables = []string{"announcements", "appeals", "banlist", "boards", "embeds", "info", "links", "posts", "reports", "sections", "sessions", "staff", "wordfilters"}
+	for _, i := range tables {
+		err := renameTable(i, i+"_old")
+		if err != nil {
+			return err
+		}
+	}
+	var buildfile = "initdb_" + dbType + ".sql"
+	err := runSQLFile(gcutil.FindResource(buildfile,
+		"/usr/local/share/gochan/"+buildfile,
+		"/usr/share/gochan/"+buildfile))
+	if err != nil {
+		return err
+	}
+	const migrFile = "oldDBMigration.sql"
+	err = runSQLFile(gcutil.FindResource(migrFile,
+		"/usr/local/share/gochan/"+migrFile,
+		"/usr/share/gochan/"+migrFile))
+	if err != nil {
+		return err
+	}
+	for _, i := range tables {
+		err := dropTable(i + "_old")
+		if err != nil {
+			return err
+		}
+	}
+	return nil
 }
 
 var migrations = map[int]func() *gcutil.GcError{}