target_validator.go

Documentation: github.com/chaos-mesh/chaos-mesh/pkg/dashboard/apivalidator

     1  // Copyright 2021 Chaos Mesh Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  // http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  //
    15  
    16  package apivalidator
    17  
    18  import (
    19  	"fmt"
    20  	"reflect"
    21  	"strconv"
    22  	"strings"
    23  
    24  	"github.com/go-playground/validator/v10"
    25  )
    26  
    27  // RequiredFieldEqualValid can be used to check the required field is not empty.
    28  func RequiredFieldEqualValid(fl validator.FieldLevel) bool {
    29  	param := strings.Split(fl.Param(), `:`)
    30  	paramField := param[0]
    31  	paramValue := param[1]
    32  
    33  	if paramField == `` {
    34  		return true
    35  	}
    36  
    37  	var paramFieldValue reflect.Value
    38  	if fl.Parent().Kind() == reflect.Ptr {
    39  		paramFieldValue = fl.Parent().Elem().FieldByName(paramField)
    40  	} else {
    41  		paramFieldValue = fl.Parent().FieldByName(paramField)
    42  	}
    43  
    44  	if !isEq(paramFieldValue, paramValue) {
    45  		return true
    46  	}
    47  
    48  	return hasValue(fl)
    49  }
    50  
    51  // The following functions are copied from validator.v9 lib.
    52  func hasValue(fl validator.FieldLevel) bool {
    53  	return requireCheckFieldKind(fl, "")
    54  }
    55  
    56  func requireCheckFieldKind(fl validator.FieldLevel, param string) bool {
    57  	field := fl.Field()
    58  	if len(param) > 0 {
    59  		if fl.Parent().Kind() == reflect.Ptr {
    60  			field = fl.Parent().Elem().FieldByName(param)
    61  		} else {
    62  			field = fl.Parent().FieldByName(param)
    63  		}
    64  	}
    65  	switch field.Kind() {
    66  	case reflect.Slice, reflect.Map, reflect.Ptr, reflect.Interface, reflect.Chan, reflect.Func:
    67  		return !field.IsNil()
    68  	default:
    69  		_, _, nullable := fl.ExtractType(field)
    70  		if nullable && field.Interface() != nil {
    71  			return true
    72  		}
    73  		return field.IsValid() && field.Interface() != reflect.Zero(field.Type()).Interface()
    74  	}
    75  }
    76  
    77  func isEq(field reflect.Value, value string) bool {
    78  	switch field.Kind() {
    79  	case reflect.String:
    80  		return field.String() == value
    81  	case reflect.Slice, reflect.Map, reflect.Array:
    82  		p := asInt(value)
    83  		return int64(field.Len()) == p
    84  	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
    85  		p := asInt(value)
    86  		return field.Int() == p
    87  	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
    88  		p := asUint(value)
    89  		return field.Uint() == p
    90  	case reflect.Float32, reflect.Float64:
    91  		p := asFloat(value)
    92  		return field.Float() == p
    93  	}
    94  
    95  	panic(fmt.Sprintf("Bad field type %T", field.Interface()))
    96  }
    97  
    98  func asInt(param string) int64 {
    99  	i, err := strconv.ParseInt(param, 0, 64)
   100  	panicIf(err)
   101  
   102  	return i
   103  }
   104  
   105  func asUint(param string) uint64 {
   106  	i, err := strconv.ParseUint(param, 0, 64)
   107  	panicIf(err)
   108  
   109  	return i
   110  }
   111  
   112  func asFloat(param string) float64 {
   113  	i, err := strconv.ParseFloat(param, 64)
   114  	panicIf(err)
   115  
   116  	return i
   117  }
   118  
   119  func panicIf(err error) {
   120  	if err != nil {
   121  		panic(err.Error())
   122  	}
   123  }
   124