github.com/googleapis/api-linter@v1.65.2/rules/aip0136/http_parent_variable.go (about)

     1  // Copyright 2019 Google LLC
     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  //     https://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  package aip0136
    16  
    17  import (
    18  	"strings"
    19  
    20  	pluralize "github.com/gertd/go-pluralize"
    21  	"github.com/googleapis/api-linter/lint"
    22  	"github.com/googleapis/api-linter/locations"
    23  	"github.com/googleapis/api-linter/rules/internal/utils"
    24  	"github.com/jhump/protoreflect/desc"
    25  	"github.com/stoewer/go-strcase"
    26  )
    27  
    28  var httpParentVariable = &lint.MethodRule{
    29  	Name:   lint.NewRuleName(136, "http-parent-variable"),
    30  	OnlyIf: isCustomMethod,
    31  	LintMethod: func(m *desc.MethodDescriptor) []lint.Problem {
    32  		p := pluralize.NewClient()
    33  		for _, http := range utils.GetHTTPRules(m) {
    34  			vars := http.GetVariables()
    35  
    36  			// If there is a "parent" variable, the noun should be present
    37  			// in the RPC name.
    38  			if _, ok := vars["parent"]; ok {
    39  				// Determine the resource.
    40  				segs := strings.Split(strings.Split(http.GetPlainURI(), ":")[0], "/")
    41  				plural := strcase.SnakeCase(segs[len(segs)-1])
    42  				singular := p.Singular(plural)
    43  
    44  				// Does the RPC name end in the singular or plural name of the resource?
    45  				// If not, complain.
    46  				snakeName := strcase.SnakeCase(m.GetName())
    47  				if !strings.HasSuffix(snakeName, plural) && !strings.HasSuffix(snakeName, singular) {
    48  					return []lint.Problem{{
    49  						Message:    "The parent variable should only be used if the RPC noun matches the URI.",
    50  						Descriptor: m,
    51  						Location:   locations.MethodHTTPRule(m),
    52  					}}
    53  				}
    54  			}
    55  		}
    56  		return nil
    57  	},
    58  }