1 package apub
2 
3 import (
4 	"fmt"
5 	"net/mail"
6 	"strings"
7 
8 	"webfinger.net/go/webfinger"
9 )
10 
11 // Finger is convenience function returning the corresponding Actor,
12 // if any, of an address resolvable by WebFinger.
13 // It is equivalent to doing webfinger.Lookup then LookupActor.
14 func Finger(address string) (*Actor, error) {
15 	jrd, err := webfinger.Lookup(address, nil)
16 	if err != nil {
17 		return nil, err
18 	}
19 	for i := range jrd.Links {
20 		if jrd.Links[i].Type == ContentType {
21 			return LookupActor(jrd.Links[i].Href)
22 		}
23 	}
24 	return nil, ErrNotExist
25 }
26 
27 func fingerAll(alist []*mail.Address) ([]Actor, error) {
28 	actors := make([]Actor, len(alist))
29 	for i, addr := range alist {
30 		if strings.Contains(addr.Address, "+followers") {
31 			addr.Address = strings.Replace(addr.Address, "+followers", "", 1)
32 			a, err := Finger(addr.Address)
33 			if err != nil {
34 				return actors, fmt.Errorf("finger %s: %w", addr.Address, err)
35 			}
36 			actors[i] = *a
37 			continue
38 		}
39 		actor, err := Finger(addr.Address)
40 		if err != nil {
41 			return actors, fmt.Errorf("finger %s: %w", addr.Address, err)
42 		}
43 		actors[i] = *actor
44 	}
45 	return actors, nil
46 }