github.com/Zenithar/prototool@v1.3.0/internal/lint/check_enum_zero_values_invalid.go (about)

     1  // Copyright (c) 2018 Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  package lint
    22  
    23  import (
    24  	"strings"
    25  
    26  	"github.com/emicklei/proto"
    27  	"github.com/uber/prototool/internal/strs"
    28  	"github.com/uber/prototool/internal/text"
    29  )
    30  
    31  var enumZeroValuesInvalidLinter = NewLinter(
    32  	"ENUM_ZERO_VALUES_INVALID",
    33  	"Verifies that all enum zero value names are [NESTED_MESSAGE_NAME_]ENUM_NAME_INVALID.",
    34  	checkEnumZeroValuesInvalid,
    35  )
    36  
    37  func checkEnumZeroValuesInvalid(add func(*text.Failure), dirPath string, descriptors []*proto.Proto) error {
    38  	return runVisitor(&enumZeroValuesInvalidVisitor{baseAddVisitor: newBaseAddVisitor(add)}, descriptors)
    39  }
    40  
    41  type enumZeroValuesInvalidVisitor struct {
    42  	baseAddVisitor
    43  
    44  	nestedNames []string
    45  }
    46  
    47  func (v *enumZeroValuesInvalidVisitor) VisitMessage(message *proto.Message) {
    48  	v.nestedNames = append(v.nestedNames, strs.ToUpperSnakeCase(message.Name))
    49  	for _, child := range message.Elements {
    50  		child.Accept(v)
    51  	}
    52  	v.nestedNames = v.nestedNames[0 : len(v.nestedNames)-1]
    53  }
    54  
    55  func (v *enumZeroValuesInvalidVisitor) VisitEnum(enum *proto.Enum) {
    56  	v.nestedNames = append(v.nestedNames, strs.ToUpperSnakeCase(enum.Name))
    57  	for _, child := range enum.Elements {
    58  		child.Accept(v)
    59  	}
    60  	v.nestedNames = v.nestedNames[0 : len(v.nestedNames)-1]
    61  }
    62  
    63  func (v *enumZeroValuesInvalidVisitor) VisitEnumField(enumField *proto.EnumField) {
    64  	if enumField.Integer == 0 {
    65  		expectedName := strings.Join(v.nestedNames, "_") + "_INVALID"
    66  		if enumField.Name != expectedName {
    67  			v.AddFailuref(enumField.Position, "Zero value enum field %q is expected to have the name %q.", enumField.Name, expectedName)
    68  		}
    69  	}
    70  }