github.com/GuanceCloud/cliutils@v1.1.21/pipeline/ptinput/funcs/fn_nullif.go (about)

     1  // Unless explicitly stated otherwise all files in this repository are licensed
     2  // under the MIT License.
     3  // This product includes software developed at Guance Cloud (https://www.guance.com/).
     4  // Copyright 2021-present Guance, Inc.
     5  
     6  package funcs
     7  
     8  import (
     9  	"fmt"
    10  	"reflect"
    11  
    12  	"github.com/GuanceCloud/platypus/pkg/ast"
    13  	"github.com/GuanceCloud/platypus/pkg/engine/runtime"
    14  	"github.com/GuanceCloud/platypus/pkg/errchain"
    15  )
    16  
    17  func NullIfChecking(ctx *runtime.Task, funcExpr *ast.CallExpr) *errchain.PlError {
    18  	if len(funcExpr.Param) != 2 {
    19  		return runtime.NewRunError(ctx, fmt.Sprintf("func %s expected 2 args", funcExpr.Name),
    20  			funcExpr.NamePos)
    21  	}
    22  
    23  	if _, err := getKeyName(funcExpr.Param[0]); err != nil {
    24  		return runtime.NewRunError(ctx, err.Error(), funcExpr.Param[0].StartPos())
    25  	}
    26  
    27  	return nil
    28  }
    29  
    30  func NullIf(ctx *runtime.Task, funcExpr *ast.CallExpr) *errchain.PlError {
    31  	if len(funcExpr.Param) != 2 {
    32  		return runtime.NewRunError(ctx, fmt.Sprintf(
    33  			"func %s expected 2 args", funcExpr.Name), funcExpr.NamePos)
    34  	}
    35  
    36  	key, err := getKeyName(funcExpr.Param[0])
    37  	if err != nil {
    38  		return runtime.NewRunError(ctx, err.Error(), funcExpr.Param[0].StartPos())
    39  	}
    40  
    41  	cont, err := ctx.GetKey(key)
    42  	if err != nil {
    43  		// l.Debugf("key `%v' not exist, ignored", key)
    44  		return nil //nolint:nilerr
    45  	}
    46  
    47  	var val interface{}
    48  
    49  	switch funcExpr.Param[1].NodeType { //nolint:exhaustive
    50  	case ast.TypeStringLiteral, ast.TypeFloatLiteral, ast.TypeIntegerLiteral,
    51  		ast.TypeBoolLiteral, ast.TypeNilLiteral:
    52  		if v, _, err := runtime.RunStmt(ctx, funcExpr.Param[1]); err == nil {
    53  			val = v
    54  		}
    55  	}
    56  
    57  	// todo key string
    58  	if reflect.DeepEqual(cont.Value, val) {
    59  		deletePtKey(ctx.InData(), key)
    60  	}
    61  
    62  	return nil
    63  }