package example

// place the yaml input here with "-l"
input: _

// validate the input against a schema
input: #Schema
#Schema: {
	owner?: {
		name!:    string
		address?: string
	}
	pets?: [...#Pet]
	#Pet: {
		name!:    string
		species!: string & or(#Species)
		breed?:   string
		age?:     int & <50 // years
	}
}
#Species: ["cat", "dog", "goldfish"]

// transform the input into the output
output: location: *input.owner.address | "Unknown"
output: petsBySpecies: {
	for s in #Species {
		(s): [
			if input.pets != _|_
			for pet in input.pets
			if pet.species == s {{
				Name: pet.name
				if pet.age != _|_ {
					Age: pet.age
					DoB: 2023 - pet.age
				}
				if pet.breed != _|_ {
					Breed: pet.breed
				}
				Owner: input.owner.name
			}},
		]
	}
}