gosora/query_gen/lib/accumulator.go

299 lines
9.2 KiB
Go

/* WIP: A version of the builder which accumulates errors, we'll see if we can't unify the implementations at some point */
package qgen
import (
"database/sql"
)
type accBuilder struct {
conn *sql.DB
adapter DB_Adapter
firstErr error
}
func (build *accBuilder) SetConn(conn *sql.DB) {
build.conn = conn
}
func (build *accBuilder) SetAdapter(name string) error {
adap, err := GetAdapter(name)
if err != nil {
return err
}
build.adapter = adap
return nil
}
func (build *accBuilder) GetAdapter() DB_Adapter {
return build.adapter
}
func (build *accBuilder) FirstError() error {
return build.firstErr
}
func (build *accBuilder) recordError(err error) {
if err == nil {
return
}
if build.firstErr == nil {
build.firstErr = err
}
}
func (build *accBuilder) prepare(res string, err error) *sql.Stmt {
if err != nil {
build.recordError(err)
return nil
}
stmt, err := build.conn.Prepare(res)
build.recordError(err)
return stmt
}
func (build *accBuilder) Tx(handler func(*TransactionBuilder) error) {
tx, err := build.conn.Begin()
if err != nil {
build.recordError(err)
return
}
err = handler(&TransactionBuilder{tx, build.adapter, nil})
if err != nil {
tx.Rollback()
build.recordError(err)
return
}
build.recordError(tx.Commit())
}
func (build *accBuilder) SimpleSelect(table string, columns string, where string, orderby string, limit string) *sql.Stmt {
return build.prepare(build.adapter.SimpleSelect("_builder", table, columns, where, orderby, limit))
}
func (build *accBuilder) SimpleCount(table string, where string, limit string) *sql.Stmt {
return build.prepare(build.adapter.SimpleCount("_builder", table, where, limit))
}
func (build *accBuilder) SimpleLeftJoin(table1 string, table2 string, columns string, joiners string, where string, orderby string, limit string) *sql.Stmt {
return build.prepare(build.adapter.SimpleLeftJoin("_builder", table1, table2, columns, joiners, where, orderby, limit))
}
func (build *accBuilder) SimpleInnerJoin(table1 string, table2 string, columns string, joiners string, where string, orderby string, limit string) *sql.Stmt {
return build.prepare(build.adapter.SimpleInnerJoin("_builder", table1, table2, columns, joiners, where, orderby, limit))
}
func (build *accBuilder) CreateTable(table string, charset string, collation string, columns []DB_Table_Column, keys []DB_Table_Key) *sql.Stmt {
return build.prepare(build.adapter.CreateTable("_builder", table, charset, collation, columns, keys))
}
func (build *accBuilder) SimpleInsert(table string, columns string, fields string) *sql.Stmt {
return build.prepare(build.adapter.SimpleInsert("_builder", table, columns, fields))
}
func (build *accBuilder) SimpleInsertSelect(ins DB_Insert, sel DB_Select) *sql.Stmt {
return build.prepare(build.adapter.SimpleInsertSelect("_builder", ins, sel))
}
func (build *accBuilder) SimpleInsertLeftJoin(ins DB_Insert, sel DB_Join) *sql.Stmt {
return build.prepare(build.adapter.SimpleInsertLeftJoin("_builder", ins, sel))
}
func (build *accBuilder) SimpleInsertInnerJoin(ins DB_Insert, sel DB_Join) *sql.Stmt {
return build.prepare(build.adapter.SimpleInsertInnerJoin("_builder", ins, sel))
}
func (build *accBuilder) SimpleUpdate(table string, set string, where string) *sql.Stmt {
return build.prepare(build.adapter.SimpleUpdate("_builder", table, set, where))
}
func (build *accBuilder) SimpleDelete(table string, where string) *sql.Stmt {
return build.prepare(build.adapter.SimpleDelete("_builder", table, where))
}
// I don't know why you need this, but here it is x.x
func (build *accBuilder) Purge(table string) *sql.Stmt {
return build.prepare(build.adapter.Purge("_builder", table))
}
func (build *accBuilder) prepareTx(tx *sql.Tx, res string, err error) (stmt *sql.Stmt) {
if err != nil {
build.recordError(err)
return nil
}
stmt, err = tx.Prepare(res)
build.recordError(err)
return stmt
}
// These ones support transactions
func (build *accBuilder) SimpleSelectTx(tx *sql.Tx, table string, columns string, where string, orderby string, limit string) (stmt *sql.Stmt) {
res, err := build.adapter.SimpleSelect("_builder", table, columns, where, orderby, limit)
return build.prepareTx(tx, res, err)
}
func (build *accBuilder) SimpleCountTx(tx *sql.Tx, table string, where string, limit string) (stmt *sql.Stmt) {
res, err := build.adapter.SimpleCount("_builder", table, where, limit)
return build.prepareTx(tx, res, err)
}
func (build *accBuilder) SimpleLeftJoinTx(tx *sql.Tx, table1 string, table2 string, columns string, joiners string, where string, orderby string, limit string) (stmt *sql.Stmt) {
res, err := build.adapter.SimpleLeftJoin("_builder", table1, table2, columns, joiners, where, orderby, limit)
return build.prepareTx(tx, res, err)
}
func (build *accBuilder) SimpleInnerJoinTx(tx *sql.Tx, table1 string, table2 string, columns string, joiners string, where string, orderby string, limit string) (stmt *sql.Stmt) {
res, err := build.adapter.SimpleInnerJoin("_builder", table1, table2, columns, joiners, where, orderby, limit)
return build.prepareTx(tx, res, err)
}
func (build *accBuilder) CreateTableTx(tx *sql.Tx, table string, charset string, collation string, columns []DB_Table_Column, keys []DB_Table_Key) (stmt *sql.Stmt) {
res, err := build.adapter.CreateTable("_builder", table, charset, collation, columns, keys)
return build.prepareTx(tx, res, err)
}
func (build *accBuilder) SimpleInsertTx(tx *sql.Tx, table string, columns string, fields string) (stmt *sql.Stmt) {
res, err := build.adapter.SimpleInsert("_builder", table, columns, fields)
return build.prepareTx(tx, res, err)
}
func (build *accBuilder) SimpleInsertSelectTx(tx *sql.Tx, ins DB_Insert, sel DB_Select) (stmt *sql.Stmt) {
res, err := build.adapter.SimpleInsertSelect("_builder", ins, sel)
return build.prepareTx(tx, res, err)
}
func (build *accBuilder) SimpleInsertLeftJoinTx(tx *sql.Tx, ins DB_Insert, sel DB_Join) (stmt *sql.Stmt) {
res, err := build.adapter.SimpleInsertLeftJoin("_builder", ins, sel)
return build.prepareTx(tx, res, err)
}
func (build *accBuilder) SimpleInsertInnerJoinTx(tx *sql.Tx, ins DB_Insert, sel DB_Join) (stmt *sql.Stmt) {
res, err := build.adapter.SimpleInsertInnerJoin("_builder", ins, sel)
return build.prepareTx(tx, res, err)
}
func (build *accBuilder) SimpleUpdateTx(tx *sql.Tx, table string, set string, where string) (stmt *sql.Stmt) {
res, err := build.adapter.SimpleUpdate("_builder", table, set, where)
return build.prepareTx(tx, res, err)
}
func (build *accBuilder) SimpleDeleteTx(tx *sql.Tx, table string, where string) (stmt *sql.Stmt) {
res, err := build.adapter.SimpleDelete("_builder", table, where)
return build.prepareTx(tx, res, err)
}
// I don't know why you need this, but here it is x.x
func (build *accBuilder) PurgeTx(tx *sql.Tx, table string) (stmt *sql.Stmt) {
res, err := build.adapter.Purge("_builder", table)
return build.prepareTx(tx, res, err)
}
func (build *accBuilder) Delete(table string) *deleteBuilder {
return &deleteBuilder{table, "", build}
}
type deleteBuilder struct {
table string
where string
build *accBuilder
}
func (delete *deleteBuilder) Where(where string) *deleteBuilder {
delete.where = where
return delete
}
func (delete *deleteBuilder) Prepare() *sql.Stmt {
return delete.build.SimpleDelete(delete.table, delete.where)
}
func (build *accBuilder) Update(table string) *updateBuilder {
return &updateBuilder{table, "", "", build}
}
type updateBuilder struct {
table string
set string
where string
build *accBuilder
}
func (update *updateBuilder) Set(set string) *updateBuilder {
update.set = set
return update
}
func (update *updateBuilder) Where(where string) *updateBuilder {
update.where = where
return update
}
func (update *updateBuilder) Prepare() *sql.Stmt {
return update.build.SimpleUpdate(update.table, update.set, update.where)
}
func (build *accBuilder) Select(table string) *selectBuilder {
return &selectBuilder{table, "", "", "", "", build}
}
type selectBuilder struct {
table string
columns string
where string
orderby string
limit string
build *accBuilder
}
func (selectItem *selectBuilder) Columns(columns string) *selectBuilder {
selectItem.columns = columns
return selectItem
}
func (selectItem *selectBuilder) Where(where string) *selectBuilder {
selectItem.where = where
return selectItem
}
func (selectItem *selectBuilder) Orderby(orderby string) *selectBuilder {
selectItem.orderby = orderby
return selectItem
}
func (selectItem *selectBuilder) Limit(limit string) *selectBuilder {
selectItem.limit = limit
return selectItem
}
func (selectItem *selectBuilder) Prepare() *sql.Stmt {
return selectItem.build.SimpleSelect(selectItem.table, selectItem.columns, selectItem.where, selectItem.orderby, selectItem.limit)
}
func (build *accBuilder) Insert(table string) *insertBuilder {
return &insertBuilder{table, "", "", build}
}
type insertBuilder struct {
table string
columns string
fields string
build *accBuilder
}
func (insert *insertBuilder) Columns(columns string) *insertBuilder {
insert.columns = columns
return insert
}
func (insert *insertBuilder) Fields(fields string) *insertBuilder {
insert.fields = fields
return insert
}
func (insert *insertBuilder) Prepare() *sql.Stmt {
return insert.build.SimpleInsert(insert.table, insert.columns, insert.fields)
}