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mysql_adapter.go
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mysql_adapter.go
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package adapters
import (
"context"
"database/sql"
"fmt"
// load SQL driver for mysql
_ "github.com/go-sql-driver/mysql"
)
type mysqlAdapter struct {
db *sql.DB
}
func (adapter mysqlAdapter) HasDatabase(ctx context.Context, database string) (bool, error) {
var count int
query := "SELECT COUNT(*) FROM INFORMATION_SCHEMA.SCHEMATA WHERE SCHEMA_NAME=?"
err := adapter.db.QueryRowContext(ctx, query, database).Scan(&count)
return count == 1, err
}
func (adapter mysqlAdapter) CreateDatabase(ctx context.Context, database string) error {
query := fmt.Sprintf("CREATE DATABASE %s;", database)
_, err := adapter.db.ExecContext(ctx, query)
return err
}
func (adapter mysqlAdapter) DeleteDatabase(ctx context.Context, database string) error {
query := fmt.Sprintf("DROP DATABASE %s;", database)
_, err := adapter.db.ExecContext(ctx, query)
return err
}
func (adapter mysqlAdapter) HasDatabaseUserWithAccess(ctx context.Context, database string, username string) (bool, error) {
var count int
query := "SELECT COUNT(*) FROM mysql.db WHERE Db=? AND USER=?"
err := adapter.db.QueryRowContext(ctx, query, database, username).Scan(&count)
return count == 1, err
}
func (adapter mysqlAdapter) CreateDatabaseUser(ctx context.Context, database string, username string, password string) error {
// make password sql safe
quotedPassword := QuoteLiteral(password)
query := fmt.Sprintf("CREATE USER '%s'@'%%' IDENTIFIED BY %s;", username, quotedPassword)
_, err := adapter.db.ExecContext(ctx, query)
if err != nil {
return err
}
query = fmt.Sprintf("GRANT ALL PRIVILEGES ON %s.* TO '%s'@'%%';", database, username)
_, err = adapter.db.ExecContext(ctx, query)
if err != nil {
return err
}
_, err = adapter.db.ExecContext(ctx, "FLUSH PRIVILEGES;")
return err
}
func (adapter mysqlAdapter) DeleteDatabaseUser(ctx context.Context, database string, username string) error {
query := fmt.Sprintf("DROP USER %s;", username)
_, err := adapter.db.ExecContext(ctx, query)
return err
}
func (adapter mysqlAdapter) Close(ctx context.Context) error {
return adapter.db.Close()
}
func GetMysqlConnection(ctx context.Context, dsn string) (*mysqlAdapter, error) {
db, err := sql.Open("mysql", dsn)
if err != nil {
return nil, err
}
adapter := mysqlAdapter{
db: db,
}
return &adapter, nil
}