extends: spectral:oas
rules:
  transportapi-operation-summary-title-case:
    description: All operation summaries must use Title Case
    severity: warn
    given: "$.paths[*][*].summary"
    then:
      function: pattern
      functionOptions:
        match: "^[A-Z][a-zA-Z]*(\\s[A-Z][a-zA-Z]*)*$"

  transportapi-operationid-required:
    description: All operations must have an operationId
    severity: error
    given: "$.paths[*][*]"
    then:
      field: operationId
      function: truthy

  transportapi-tags-required:
    description: All operations must have tags
    severity: warn
    given: "$.paths[*][*]"
    then:
      field: tags
      function: truthy

  transportapi-json-extension-in-paths:
    description: UK transport endpoints should end with .json extension
    severity: hint
    given: "$.paths"
    then:
      function: schema
      functionOptions:
        schema:
          type: object
          patternProperties:
            ".*\\.json$": {}

  transportapi-response-200-required:
    description: All GET operations must have a 200 response
    severity: error
    given: "$.paths[*].get.responses"
    then:
      field: "200"
      function: truthy

  transportapi-app-auth-params:
    description: API authentication via app_id and app_key query parameters must be documented
    severity: warn
    given: "$.components.securitySchemes"
    then:
      function: truthy

  transportapi-uk-base-path:
    description: All paths should operate under UK data context
    severity: info
    given: "$.servers[*].url"
    then:
      function: pattern
      functionOptions:
        match: ".*transportapi\\.com.*"

  transportapi-atcocode-path-param:
    description: Bus stop path parameters should be named atcocode
    severity: hint
    given: "$.paths[*][*].parameters[*][?(@.in=='path' && @.name=='station_stop')]"
    then:
      function: falsy

  transportapi-datetime-format:
    description: Date-time properties should use ISO 8601 format
    severity: warn
    given: "$.components.schemas[*].properties[?(@.format=='date-time')]"
    then:
      field: format
      function: enumeration
      functionOptions:
        values:
          - date-time

  transportapi-pagination-limit:
    description: Collection endpoints should support limit parameter
    severity: hint
    given: "$.paths[*].get.parameters[*][?(@.name=='limit')]"
    then:
      field: schema
      function: truthy