extends: spectral:oas
formats:
  - oas3
rules:
  lancaster-info-contact:
    description: Lancaster API descriptions should carry the library DIT contact.
    severity: warn
    given: $.info
    then:
      field: contact
      function: truthy
  lancaster-oai-verb-param-required:
    description: >-
      The OAI-PMH dispatch operation must declare the required "verb" query
      parameter (the protocol selects the operation by verb).
    severity: error
    given: $.paths['/oai2'].get.parameters[?(@.name=='verb')]
    then:
      field: required
      function: truthy
  lancaster-oai-verb-enumerated:
    description: The verb parameter must enumerate the supported OAI-PMH verbs.
    severity: error
    given: $.paths['/oai2'].get.parameters[?(@.name=='verb')].schema
    then:
      field: enum
      function: truthy
  lancaster-metadata-prefix-enumerated:
    description: >-
      metadataPrefix should be constrained to the formats this repository
      actually disseminates.
    severity: warn
    given: $.paths['/oai2'].get.parameters[?(@.name=='metadataPrefix')].schema
    then:
      field: enum
      function: truthy
  lancaster-datetime-granularity:
    description: from/until selective-harvesting params should use date-time format.
    severity: warn
    given: $.paths['/oai2'].get.parameters[?(@.name=='from' || @.name=='until')].schema
    then:
      field: format
      function: truthy