extends: spectral:oas
rules:
  sap-bi-tools-operation-summary-title-case:
    description: Operation summaries must use Title Case
    message: Summary "{{value}}" should be in Title Case
    given: "$.paths[*][*].summary"
    severity: warn
    then:
      function: pattern
      functionOptions:
        match: "^[A-Z]"

  sap-bi-tools-operation-id-camel-case:
    description: OperationIds must use camelCase
    message: OperationId "{{value}}" should use camelCase
    given: "$.paths[*][*].operationId"
    severity: warn
    then:
      function: pattern
      functionOptions:
        match: "^[a-z][a-zA-Z0-9]+$"

  sap-bi-tools-tags-title-case:
    description: All tags must use Title Case
    message: Tag "{{value}}" should be in Title Case
    given: "$.tags[*].name"
    severity: warn
    then:
      function: pattern
      functionOptions:
        match: "^[A-Z]"

  sap-bi-tools-path-kebab-case:
    description: API path segments must use kebab-case
    message: Path segment "{{value}}" should use kebab-case
    given: "$.paths"
    severity: warn
    then:
      function: pattern
      functionOptions:
        match: "^(/[a-z][a-z0-9-]*(/[a-z][a-z0-9-]*|/\\{[a-zA-Z][a-zA-Z0-9]*\\})*)*$"

  sap-bi-tools-oauth2-required:
    description: SAP Analytics Cloud APIs require OAuth 2.0 security
    message: Operations should specify OAuth 2.0 security
    given: "$.components.securitySchemes"
    severity: warn
    then:
      function: truthy

  sap-bi-tools-response-200-schema:
    description: GET operations must define a 200 response schema
    message: GET operation should define a 200 response with a schema
    given: "$.paths[*].get.responses.200.content"
    severity: warn
    then:
      function: truthy

  sap-bi-tools-contact-info:
    description: API info must include contact information
    message: API info should include a contact block
    given: "$.info.contact"
    severity: warn
    then:
      function: truthy

  sap-bi-tools-external-docs:
    description: APIs should reference external documentation
    message: API should include an externalDocs block pointing to SAP Help Portal
    given: "$.externalDocs"
    severity: info
    then:
      function: truthy

  sap-bi-tools-servers-defined:
    description: APIs must define at least one server URL
    message: API should define at least one server in the servers array
    given: "$.servers"
    severity: error
    then:
      function: truthy

  sap-bi-tools-odata-dollar-params:
    description: OData query parameters should use $-prefixed names
    message: OData parameters should follow $filter, $top, $skip, $select, $orderby naming convention
    given: "$.paths[*][*].parameters[*].name"
    severity: info
    then:
      function: pattern
      functionOptions:
        notMatch: "^(filter|top|skip|select|orderby|format)$"