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op_condition.go
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op_condition.go
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// Copyright 2023 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"
"reflect"
"strings"
"github.com/xgfone/go-op"
)
func appendWheres(wheres []op.Condition, conds ...op.Condition) []op.Condition {
switch _len := len(conds); {
case _len == 0, _len == 1 && conds[0] == nil:
return wheres
}
if wheres == nil {
wheres = make([]op.Condition, 0, len(conds)+2)
}
for _, cond := range conds {
if cond == nil {
continue
}
if _op := cond.Op(); _op.Op == op.CondOpAnd {
switch _conds := _op.Val.(type) {
case []op.Condition:
wheres = appendWheres(wheres, _conds...)
case interface{ Conditions() []op.Condition }:
wheres = appendWheres(wheres, _conds.Conditions()...)
default:
wheres = append(wheres, cond)
}
} else {
wheres = append(wheres, cond)
}
}
return wheres
}
func init() {
RegisterOpBuilder(op.CondOpIsNull, newCondOne("%s IS NULL"))
RegisterOpBuilder(op.CondOpIsNotNull, newCondOne("%s IS NOT NULL"))
RegisterOpBuilder(op.CondOpEqual, newCondTwo("%s=%s"))
RegisterOpBuilder(op.CondOpNotEqual, newCondTwo("%s<>%s"))
RegisterOpBuilder(op.CondOpLess, newCondTwo("%s<%s"))
RegisterOpBuilder(op.CondOpLessEqual, newCondTwo("%s<=%s"))
RegisterOpBuilder(op.CondOpGreater, newCondTwo("%s>%s"))
RegisterOpBuilder(op.CondOpGreaterEqual, newCondTwo("%s>=%s"))
RegisterOpBuilder(op.CondOpLike, newCondLike("%s LIKE %s"))
RegisterOpBuilder(op.CondOpNotLike, newCondLike("%s NOT LIKE %s"))
RegisterOpBuilder(op.CondOpIn, newCondIn("%s IN (%s)"))
RegisterOpBuilder(op.CondOpNotIn, newCondIn("%s NOT IN (%s)"))
RegisterOpBuilder(op.CondOpBetween, newCondBetween("%s BETWEEN %s AND %s"))
RegisterOpBuilder(op.CondOpNotBetween, newCondBetween("%s NOT BETWEEN %s AND %s"))
RegisterOpBuilder(op.CondOpAnd, newCondGroup(" AND "))
RegisterOpBuilder(op.CondOpOr, newCondGroup(" OR "))
RegisterOpBuilder(op.CondOpEqualKey, newCondColumn("="))
RegisterOpBuilder(op.CondOpNotEqualKey, newCondColumn("<>"))
RegisterOpBuilder(op.CondOpLessKey, newCondColumn("<"))
RegisterOpBuilder(op.CondOpLessEqualKey, newCondColumn("<="))
RegisterOpBuilder(op.CondOpGreaterKey, newCondColumn(">"))
RegisterOpBuilder(op.CondOpGreaterEqualKey, newCondColumn(">="))
}
func newCondOne(format string) OpBuilder {
return OpBuilderFunc(func(ab *ArgsBuilder, op op.Op) string {
return fmt.Sprintf(format, ab.Quote(getOpKey(op)))
})
}
func newCondTwo(format string) OpBuilder {
return OpBuilderFunc(func(ab *ArgsBuilder, op op.Op) string {
return fmt.Sprintf(format, ab.Quote(getOpKey(op)), ab.Add(op.Val))
})
}
func newCondLike(format string) OpBuilder {
return OpBuilderFunc(func(ab *ArgsBuilder, op op.Op) string {
value := op.Val.(string)
if strings.IndexByte(value, '%') < 0 {
value = strings.Join([]string{"%", "%"}, value)
}
return fmt.Sprintf(format, ab.Quote(getOpKey(op)), ab.Add(value))
})
}
func newCondIn(format string) OpBuilder {
return OpBuilderFunc(func(ab *ArgsBuilder, op op.Op) string {
switch vs := op.Val.(type) {
case nil:
return "1=0"
case []any:
return fmtcondin_slice(format, ab, op, vs)
case []int:
return fmtcondin_slice(format, ab, op, vs)
case []uint:
return fmtcondin_slice(format, ab, op, vs)
case []int32:
return fmtcondin_slice(format, ab, op, vs)
case []uint32:
return fmtcondin_slice(format, ab, op, vs)
case []int64:
return fmtcondin_slice(format, ab, op, vs)
case []uint64:
return fmtcondin_slice(format, ab, op, vs)
case []string:
return fmtcondin_slice(format, ab, op, vs)
case map[string]bool:
return fmtcondin_map(format, ab, op, vs)
case map[string]struct{}:
return fmtcondin_map(format, ab, op, vs)
case map[int]bool:
return fmtcondin_map(format, ab, op, vs)
case map[int]struct{}:
return fmtcondin_map(format, ab, op, vs)
case map[uint]bool:
return fmtcondin_map(format, ab, op, vs)
case map[uint]struct{}:
return fmtcondin_map(format, ab, op, vs)
case map[int32]bool:
return fmtcondin_map(format, ab, op, vs)
case map[int32]struct{}:
return fmtcondin_map(format, ab, op, vs)
case map[uint32]bool:
return fmtcondin_map(format, ab, op, vs)
case map[uint32]struct{}:
return fmtcondin_map(format, ab, op, vs)
case map[int64]bool:
return fmtcondin_map(format, ab, op, vs)
case map[int64]struct{}:
return fmtcondin_map(format, ab, op, vs)
case map[uint64]bool:
return fmtcondin_map(format, ab, op, vs)
case map[uint64]struct{}:
return fmtcondin_map(format, ab, op, vs)
default:
var ss []string
switch vf := reflect.ValueOf(op.Val); vf.Kind() {
case reflect.Array, reflect.Slice:
_len := vf.Len()
if _len == 0 {
return "1=0"
}
ss = make([]string, _len)
for i := 0; i < _len; i++ {
ss[i] = ab.Add(vf.Index(i).Interface())
}
case reflect.Map:
_len := vf.Len()
if _len == 0 {
return "1=0"
}
ss = make([]string, 0, _len)
for _, key := range vf.MapKeys() {
ss = append(ss, ab.Add(vf.MapIndex(key).Interface()))
}
default:
panic(fmt.Errorf("sqlx: condition IN not support type %T", op.Val))
}
return fmt.Sprintf(format, ab.Quote(getOpKey(op)), strings.Join(ss, ", "))
}
})
}
func fmtcondin_map[M ~map[K]V, K comparable, V bool | struct{}](format string, ab *ArgsBuilder, op op.Op, vs M) string {
switch _len := len(vs); _len {
case 0:
return "1=0"
default:
ss := make([]string, 0, _len)
for k := range vs {
ss = append(ss, ab.Add(k))
}
return fmt.Sprintf(format, ab.Quote(getOpKey(op)), strings.Join(ss, ", "))
}
}
func fmtcondin_slice[T any](format string, ab *ArgsBuilder, op op.Op, vs []T) string {
switch _len := len(vs); _len {
case 0:
return "1=0"
case 1:
return fmt.Sprintf(format, ab.Quote(getOpKey(op)), ab.Add(vs[0]))
default:
ss := make([]string, _len)
for i := 0; i < _len; i++ {
ss[i] = ab.Add(vs[i])
}
return fmt.Sprintf(format, ab.Quote(getOpKey(op)), strings.Join(ss, ", "))
}
}
func newCondBetween(format string) OpBuilder {
return OpBuilderFunc(func(ab *ArgsBuilder, _op op.Op) string {
v := _op.Val.(op.Boundary)
return fmt.Sprintf(format, ab.Quote(getOpKey(_op)), ab.Add(v.Lower), ab.Add(v.Upper))
})
}
func newCondGroup(sep string) OpBuilder {
return OpBuilderFunc(func(ab *ArgsBuilder, _op op.Op) string {
var ss []string
switch vs := _op.Val.(type) {
case []op.Condition:
ss = toslice(vs, func(cond op.Condition) 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))
}
if len(ss) == 0 {
return ""
}
return fmt.Sprintf("(%s)", strings.Join(ss, sep))
})
}
func newCondColumn(ops string) OpBuilder {
return OpBuilderFunc(func(ab *ArgsBuilder, _op op.Op) string {
return fmt.Sprintf("%s%s%s", ab.Quote(getOpKey(_op)), ops, ab.Quote(_op.Val.(string)))
})
}