Function expandArrayableSchema

packages/openapi/src/schema-utils.ts:205–228

(schema: JSONSchema)

}

export function expandArrayableSchema(schema: JSONSchema): undefined | [items: JSONSchema, array: JSONSchema & { type: 'array', items?: JSONSchema }] {
  const schemas = expandUnionSchema(schema)

  if (schemas.length !== 2) {
    return undefined
  }

  const arraySchema = schemas.find(
    s => typeof s === 'object' && s.type === 'array' && Object.keys(s).filter(k => LOGIC_KEYWORDS.includes(k)).every(k => k === 'type' || k === 'items'),
  ) as JSONSchema & { type: 'array', items?: JSONSchema }

  if (arraySchema === undefined) {
    return undefined
  }

  const items1 = arraySchema.items
  const items2 = schemas.find(s => s !== arraySchema) as JSONSchema

  if (stringifyJSON(items1) !== stringifyJSON(items2)) {
    return undefined
  }

  return [items2, arraySchema]
}

const PRIMITIVE_SCHEMA_TYPES = new Set<string>([
  JSONSchemaTypeName.String,