gosora/query_gen/builder.go

240 lines
8.0 KiB
Go

/* WIP Under Construction */
package qgen
import (
"database/sql"
"log"
)
var Builder *builder
func init() {
Builder = &builder{conn: nil}
}
// A set of wrappers around the generator methods, so that we can use this inline in Gosora
type builder struct {
conn *sql.DB
adapter Adapter
}
func (b *builder) Accumulator() *Accumulator {
return &Accumulator{b.conn, b.adapter, nil}
}
// TODO: Move this method out of builder?
func (b *builder) Init(adapter string, config map[string]string) error {
err := b.SetAdapter(adapter)
if err != nil {
return err
}
conn, err := b.adapter.BuildConn(config)
b.conn = conn
log.Print("err:", err) // Is the problem here somehow?
return err
}
func (b *builder) SetConn(conn *sql.DB) {
b.conn = conn
}
func (b *builder) GetConn() *sql.DB {
return b.conn
}
func (b *builder) SetAdapter(name string) error {
adap, err := GetAdapter(name)
if err != nil {
return err
}
b.adapter = adap
return nil
}
func (b *builder) GetAdapter() Adapter {
return b.adapter
}
func (b *builder) DbVersion() (dbVersion string) {
b.conn.QueryRow(b.adapter.DbVersion()).Scan(&dbVersion)
return dbVersion
}
func (b *builder) Begin() (*sql.Tx, error) {
return b.conn.Begin()
}
func (b *builder) Tx(h func(*TransactionBuilder) error) error {
tx, err := b.conn.Begin()
if err != nil {
return err
}
err = h(&TransactionBuilder{tx, b.adapter, nil})
if err != nil {
tx.Rollback()
return err
}
return tx.Commit()
}
func (b *builder) prepare(res string, err error) (*sql.Stmt, error) {
if err != nil {
return nil, err
}
return b.conn.Prepare(res)
}
func (b *builder) SimpleSelect(table, columns, where, orderby, limit string) (stmt *sql.Stmt, err error) {
return b.prepare(b.adapter.SimpleSelect("", table, columns, where, orderby, limit))
}
func (b *builder) SimpleCount(table, where, limit string) (stmt *sql.Stmt, err error) {
return b.prepare(b.adapter.SimpleCount("", table, where, limit))
}
func (b *builder) SimpleLeftJoin(table1, table2, columns, joiners, where, orderby, limit string) (stmt *sql.Stmt, err error) {
return b.prepare(b.adapter.SimpleLeftJoin("", table1, table2, columns, joiners, where, orderby, limit))
}
func (b *builder) SimpleInnerJoin(table1, table2, columns, joiners, where, orderby, limit string) (stmt *sql.Stmt, err error) {
return b.prepare(b.adapter.SimpleInnerJoin("", table1, table2, columns, joiners, where, orderby, limit))
}
func (b *builder) DropTable(table string) (stmt *sql.Stmt, err error) {
return b.prepare(b.adapter.DropTable("", table))
}
func (build *builder) CreateTable(table, charset, collation string, columns []DBTableColumn, keys []DBTableKey) (stmt *sql.Stmt, err error) {
return build.prepare(build.adapter.CreateTable("", table, charset, collation, columns, keys))
}
func (b *builder) AddColumn(table string, column DBTableColumn, key *DBTableKey) (stmt *sql.Stmt, err error) {
return b.prepare(b.adapter.AddColumn("", table, column, key))
}
func (b *builder) DropColumn(table, colName string) (stmt *sql.Stmt, err error) {
return b.prepare(b.adapter.DropColumn("", table, colName))
}
func (b *builder) RenameColumn(table, oldName, newName string) (stmt *sql.Stmt, err error) {
return b.prepare(b.adapter.RenameColumn("", table, oldName, newName))
}
func (b *builder) ChangeColumn(table, colName string, col DBTableColumn) (stmt *sql.Stmt, err error) {
return b.prepare(b.adapter.ChangeColumn("", table, colName, col))
}
func (b *builder) SetDefaultColumn(table, colName, colType, defaultStr string) (stmt *sql.Stmt, err error) {
return b.prepare(b.adapter.SetDefaultColumn("", table, colName, colType, defaultStr))
}
func (b *builder) AddIndex(table, iname, colname string) (stmt *sql.Stmt, err error) {
return b.prepare(b.adapter.AddIndex("", table, iname, colname))
}
func (b *builder) AddKey(table, column string, key DBTableKey) (stmt *sql.Stmt, err error) {
return b.prepare(b.adapter.AddKey("", table, column, key))
}
func (b *builder) AddForeignKey(table, column, ftable, fcolumn string, cascade bool) (stmt *sql.Stmt, err error) {
return b.prepare(b.adapter.AddForeignKey("", table, column, ftable, fcolumn, cascade))
}
func (b *builder) SimpleInsert(table, columns, fields string) (stmt *sql.Stmt, err error) {
return b.prepare(b.adapter.SimpleInsert("", table, columns, fields))
}
func (b *builder) SimpleInsertSelect(ins DBInsert, sel DBSelect) (stmt *sql.Stmt, err error) {
return b.prepare(b.adapter.SimpleInsertSelect("", ins, sel))
}
func (b *builder) SimpleInsertLeftJoin(ins DBInsert, sel DBJoin) (stmt *sql.Stmt, err error) {
return b.prepare(b.adapter.SimpleInsertLeftJoin("", ins, sel))
}
func (b *builder) SimpleInsertInnerJoin(ins DBInsert, sel DBJoin) (stmt *sql.Stmt, err error) {
return b.prepare(b.adapter.SimpleInsertInnerJoin("", ins, sel))
}
func (b *builder) SimpleUpdate(table, set, where string) (stmt *sql.Stmt, err error) {
return b.prepare(b.adapter.SimpleUpdate(qUpdate(table, set, where)))
}
func (b *builder) SimpleDelete(table, where string) (stmt *sql.Stmt, err error) {
return b.prepare(b.adapter.SimpleDelete("", table, where))
}
// I don't know why you need this, but here it is x.x
func (b *builder) Purge(table string) (stmt *sql.Stmt, err error) {
return b.prepare(b.adapter.Purge("", table))
}
func (b *builder) prepareTx(tx *sql.Tx, res string, err error) (*sql.Stmt, error) {
if err != nil {
return nil, err
}
return tx.Prepare(res)
}
// These ones support transactions
func (b *builder) SimpleSelectTx(tx *sql.Tx, table, columns, where, orderby, limit string) (stmt *sql.Stmt, err error) {
res, err := b.adapter.SimpleSelect("", table, columns, where, orderby, limit)
return b.prepareTx(tx, res, err)
}
func (b *builder) SimpleCountTx(tx *sql.Tx, table, where, limit string) (stmt *sql.Stmt, err error) {
res, err := b.adapter.SimpleCount("", table, where, limit)
return b.prepareTx(tx, res, err)
}
func (b *builder) SimpleLeftJoinTx(tx *sql.Tx, table1, table2, columns, joiners, where, orderby, limit string) (stmt *sql.Stmt, err error) {
res, err := b.adapter.SimpleLeftJoin("", table1, table2, columns, joiners, where, orderby, limit)
return b.prepareTx(tx, res, err)
}
func (b *builder) SimpleInnerJoinTx(tx *sql.Tx, table1, table2, columns, joiners, where, orderby, limit string) (stmt *sql.Stmt, err error) {
res, err := b.adapter.SimpleInnerJoin("", table1, table2, columns, joiners, where, orderby, limit)
return b.prepareTx(tx, res, err)
}
func (b *builder) CreateTableTx(tx *sql.Tx, table, charset, collation string, columns []DBTableColumn, keys []DBTableKey) (stmt *sql.Stmt, err error) {
res, err := b.adapter.CreateTable("", table, charset, collation, columns, keys)
return b.prepareTx(tx, res, err)
}
func (b *builder) SimpleInsertTx(tx *sql.Tx, table, columns, fields string) (stmt *sql.Stmt, err error) {
res, err := b.adapter.SimpleInsert("", table, columns, fields)
return b.prepareTx(tx, res, err)
}
func (b *builder) SimpleInsertSelectTx(tx *sql.Tx, ins DBInsert, sel DBSelect) (stmt *sql.Stmt, err error) {
res, err := b.adapter.SimpleInsertSelect("", ins, sel)
return b.prepareTx(tx, res, err)
}
func (b *builder) SimpleInsertLeftJoinTx(tx *sql.Tx, ins DBInsert, sel DBJoin) (stmt *sql.Stmt, err error) {
res, err := b.adapter.SimpleInsertLeftJoin("", ins, sel)
return b.prepareTx(tx, res, err)
}
func (b *builder) SimpleInsertInnerJoinTx(tx *sql.Tx, ins DBInsert, sel DBJoin) (stmt *sql.Stmt, err error) {
res, err := b.adapter.SimpleInsertInnerJoin("", ins, sel)
return b.prepareTx(tx, res, err)
}
func (b *builder) SimpleUpdateTx(tx *sql.Tx, table, set, where string) (stmt *sql.Stmt, err error) {
res, err := b.adapter.SimpleUpdate(qUpdate(table, set, where))
return b.prepareTx(tx, res, err)
}
func (b *builder) SimpleDeleteTx(tx *sql.Tx, table, where string) (stmt *sql.Stmt, err error) {
res, err := b.adapter.SimpleDelete("", table, where)
return b.prepareTx(tx, res, err)
}
// I don't know why you need this, but here it is x.x
func (b *builder) PurgeTx(tx *sql.Tx, table string) (stmt *sql.Stmt, err error) {
res, err := b.adapter.Purge("", table)
return b.prepareTx(tx, res, err)
}