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op_updater.go
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op_updater.go
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// Copyright 2023~2024 xgfone
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package sqlx
import (
"fmt"
"strings"
"github.com/xgfone/go-op"
)
func init() {
RegisterOpBuilder(op.UpdateOpBatch, newUpdaterBatch())
RegisterOpBuilder(op.UpdateOpSet, newUpdaterSet())
RegisterOpBuilder(op.UpdateOpInc, newUpdaterTwo("%s=%s+1"))
RegisterOpBuilder(op.UpdateOpDec, newUpdaterTwo("%s=%s-1"))
RegisterOpBuilder(op.UpdateOpAdd, newUpdaterThree("%s=%s+%s"))
RegisterOpBuilder(op.UpdateOpSub, newUpdaterThree("%s=%s-%s"))
RegisterOpBuilder(op.UpdateOpMul, newUpdaterThree("%s=%s*%s"))
RegisterOpBuilder(op.UpdateOpDiv, newUpdaterThree("%s=%s/%s"))
}
func newUpdaterBatch() OpBuilder {
return OpBuilderFunc(func(ab *ArgsBuilder, _op op.Op) string {
var ss []string
switch vs := _op.Val.(type) {
case []op.Updater:
ss = toslice(vs, func(cond op.Updater) string { return BuildOp(ab, cond.Op()) })
case []op.Oper:
ss = toslice(vs, func(oper op.Oper) string { return BuildOp(ab, oper.Op()) })
case []op.Op:
ss = toslice(vs, func(op op.Op) string { return BuildOp(ab, op) })
default:
panic(fmt.Errorf("sqlx: unsupported value type %T for op '%s:%v'", _op.Val, _op.Kind, _op.Op))
}
return strings.Join(ss, ", ")
})
}
func newUpdaterSet() OpBuilder {
return OpBuilderFunc(func(ab *ArgsBuilder, op op.Op) string {
if op.Lazy != nil {
op = op.Lazy(op)
}
return fmt.Sprintf("%s=%s", ab.Quote(getOpKey(op)), ab.Add(op.Val))
})
}
func newUpdaterTwo(format string) OpBuilder {
return OpBuilderFunc(func(ab *ArgsBuilder, op op.Op) string {
column := ab.Quote(getOpKey(op))
return fmt.Sprintf(format, column, column)
})
}
func newUpdaterThree(format string) OpBuilder {
return OpBuilderFunc(func(ab *ArgsBuilder, o op.Op) string {
left := ab.Quote(getOpKey(o))
right := left
var value string
switch v := o.Val.(type) {
case op.KV:
right = ab.Quote(v.Key)
if s, ok := v.Val.(string); ok {
value = ab.Quote(s)
} else {
value = ab.Add(v.Val)
}
case string:
value = ab.Quote(v)
default:
value = ab.Add(v)
}
return fmt.Sprintf(format, left, right, value)
})
}