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
		}},
	]}
}