package webfinder

import (
	"git.macaw.me/inhosin/subhub/handlers"
	"net/mail"
	"strings"
)

func newBadAddressError(address string) *badAddressError {
	return &badAddressError{address: address}
}

func slugOf(address string) string {
	fragment := strings.Split(address, "@")
	return fragment[0]
}

func atAddress(address string) (*Resource, error) {
	// foo@bar.org => foo
	parser := mail.AddressParser{}
	_, err := parser.Parse(address)
	if err != nil {
		return nil, newBadAddressError(address)
	}

	// foo@bar.org => foo
	slug := slugOf(address)
	domain := handlers.GetFullHostName()

	return &Resource{
		Subject: address,
		Links: []Link{
			{
				Rel:  "self",
				Type: "application/activity+json",
				HRef: domain + "/api/group/" + slug,
			},
		},
	}, nil
}