Move to string-ids for all entities (compat translation for existing data)

scnserver/db/impl/primary/compat.go

@@ -0,0 +1,100 @@
+package primary
+
+import (
+	"database/sql"
+	"errors"
+	"gogs.mikescher.com/BlackForestBytes/goext/sq"
+)
+
+func (db *Database) CreateCompatID(ctx TxContext, idtype string, newid string) (int64, error) {
+	tx, err := ctx.GetOrCreateTransaction(db)
+	if err != nil {
+		return 0, err
+	}
+
+	rows, err := tx.Query(ctx, "SELECT COALESCE(MAX(old), 0) FROM compat_ids", sq.PP{})
+	if err != nil {
+		return 0, err
+	}
+
+	if !rows.Next() {
+		return 0, errors.New("failed to query MAX(old)")
+	}
+
+	var oldid int64
+	err = rows.Scan(&oldid)
+	if err != nil {
+		return 0, err
+	}
+
+	oldid++
+
+	_, err = tx.Exec(ctx, "INSERT INTO compat_ids (old, new, type) VALUES (:old, :new, :typ)", sq.PP{
+		"old": oldid,
+		"new": newid,
+		"typ": idtype,
+	})
+	if err != nil {
+		return 0, err
+	}
+
+	return oldid, nil
+}
+
+func (db *Database) ConvertCompatID(ctx TxContext, oldid int64, idtype string) (*string, error) {
+	tx, err := ctx.GetOrCreateTransaction(db)
+	if err != nil {
+		return nil, err
+	}
+
+	rows, err := tx.Query(ctx, "SELECT new FROM compat_ids WHERE old = :old AND type = :typ", sq.PP{
+		"old": oldid,
+		"typ": idtype,
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	if !rows.Next() {
+		return nil, nil
+	}
+
+	var newid string
+	err = rows.Scan(&newid)
+	if err == sql.ErrNoRows {
+		return nil, nil
+	}
+	if err != nil {
+		return nil, err
+	}
+
+	return &newid, nil
+}
+
+func (db *Database) ConvertToCompatID(ctx TxContext, newid string) (*int64, *string, error) {
+	tx, err := ctx.GetOrCreateTransaction(db)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	rows, err := tx.Query(ctx, "SELECT old, type FROM compat_ids WHERE new = :new", sq.PP{"new": newid})
+	if err != nil {
+		return nil, nil, err
+	}
+
+	if !rows.Next() {
+		return nil, nil, nil
+	}
+
+	var oldid int64
+	var idtype string
+	err = rows.Scan(&oldid, &idtype)
+	if err == sql.ErrNoRows {
+		return nil, nil, nil
+	}
+	if err != nil {
+		return nil, nil, err
+	}
+
+	return &oldid, &idtype, nil
+}