how to validate regex for open API using spectral rule - regex

Question

I am creating a custom rule for spectral for mapping the path and path parameters but having some difficulty with regex. I have the following rules:
1) URI MUST be in lowercase OR with combined words using the hyphen( - ). Aka kebab-case
Example:
https://api.com/payments/pending
https://api.com/payments/pending-payments
2) Path and Query string parameters MUST be in lowerCamelCase.
Example:
https://api.com/payments/payments/{paymentId}
https://api.com/payments/pending-payments/?paymentType=xxx
In the spectral rule set I have defined my custom rule like this:
paths-kebab-case:
description: Paths should be kebab-case.
message: "{{property}} should be kebab-case (lower-case and separated with hyphens)"
severity: error
given: $.paths[*]~
then:
function: pattern
functionOptions:
match: "^(\/([\da-z]+(-[\da-z]+)? |\{[a-z]+([A-Z][a-z]+)*}) )+$"
path-parameter-must-lower-camel-case:
message: Path parameters must be lowerCamelCase
description: MUST use lowerCamelCase
severity: error
given: $.paths.*~
then:
function: pattern
functionOptions:
match: '^[a-z][a-z]*(([A-Z][a-z]+)*[A-Z]?|([a-z]+[A-Z])*|[A-Z])$'
It seems to be not validating properly. like if my path contains only a single path, I am getting the error.
10:9 error path-parameter-must-lower-camel-case Path parameters must be lowerCamelCase
25:9 warning parser Mapping key must be a string scalar rather than number
48:9 warning parser Mapping key must be a string scalar rather than number
56:17 error path-parameter-must-lower-camel-case Path parameters must be lowerCamelCase
70:9 warning parser Mapping key must be a string scalar rather than number
Here is the swagger API:
openapi: "3.0.0"
info:
version: 1.0.0
title: Swagger Petstore
license:
name: MIT
servers:
- url: http://petstore.swagger.io/v1
paths:
/pets:
get:
summary: List all pets
operationId: listPets
tags:
- pets
parameters:
- name: limit
in: query
description: How many items to return at one time (max 100)
required: false
schema:
type: integer
format: int32
responses:
200:
description: An paged array of pets
headers:
x-next:
description: A link to the next page of responses
schema:
type: string
content:
application/json:
schema:
$ref: "#/components/schemas/Pets"
default:
description: unexpected error
content:
application/json:
schema:
$ref: "#/components/schemas/Error"
post:
summary: Create a pet
operationId: createPets
tags:
- pets
responses:
201:
description: Null response
default:
description: unexpected error
content:
application/json:
schema:
$ref: "#/components/schemas/Error"
/pets/{petId}:
get:
summary: Info for a specific pet
operationId: showPetById
tags:
- pets
parameters:
- name: petId
in: path
required: true
description: The id of the pet to retrieve
schema:
type: string
responses:
200:
description: Expected response to a valid request
content:
application/json:
schema:
$ref: "#/components/schemas/Pets"
default:
description: unexpected error
content:
application/json:
schema:
$ref: "#/components/schemas/Error"
components:
schemas:
Pet:
required:
- id
- name
properties:
id:
type: integer
format: int64
name:
type: string
tag:
type: string
Pets:
type: array
items:
$ref: "#/components/schemas/Pet"
Error:
required:
- code
- message
properties:
code:
type: integer
format: int32
message:
type: string