Adding upstream version 0.28.1.

Signed-off-by: Daniel Baumann <daniel@debian.org>

tools/auth/facebook.go

@@ -0,0 +1,78 @@
+package auth
+
+import (
+	"context"
+	"encoding/json"
+
+	"github.com/pocketbase/pocketbase/tools/types"
+	"golang.org/x/oauth2"
+	"golang.org/x/oauth2/facebook"
+)
+
+func init() {
+	Providers[NameFacebook] = wrapFactory(NewFacebookProvider)
+}
+
+var _ Provider = (*Facebook)(nil)
+
+// NameFacebook is the unique name of the Facebook provider.
+const NameFacebook string = "facebook"
+
+// Facebook allows authentication via Facebook OAuth2.
+type Facebook struct {
+	BaseProvider
+}
+
+// NewFacebookProvider creates new Facebook provider instance with some defaults.
+func NewFacebookProvider() *Facebook {
+	return &Facebook{BaseProvider{
+		ctx:         context.Background(),
+		displayName: "Facebook",
+		pkce:        true,
+		scopes:      []string{"email"},
+		authURL:     facebook.Endpoint.AuthURL,
+		tokenURL:    facebook.Endpoint.TokenURL,
+		userInfoURL: "https://graph.facebook.com/me?fields=name,email,picture.type(large)",
+	}}
+}
+
+// FetchAuthUser returns an AuthUser instance based on the Facebook's user api.
+//
+// API reference: https://developers.facebook.com/docs/graph-api/reference/user/
+func (p *Facebook) FetchAuthUser(token *oauth2.Token) (*AuthUser, error) {
+	data, err := p.FetchRawUserInfo(token)
+	if err != nil {
+		return nil, err
+	}
+
+	rawUser := map[string]any{}
+	if err := json.Unmarshal(data, &rawUser); err != nil {
+		return nil, err
+	}
+
+	extracted := struct {
+		Id      string
+		Name    string
+		Email   string
+		Picture struct {
+			Data struct{ Url string }
+		}
+	}{}
+	if err := json.Unmarshal(data, &extracted); err != nil {
+		return nil, err
+	}
+
+	user := &AuthUser{
+		Id:           extracted.Id,
+		Name:         extracted.Name,
+		Email:        extracted.Email,
+		AvatarURL:    extracted.Picture.Data.Url,
+		RawUser:      rawUser,
+		AccessToken:  token.AccessToken,
+		RefreshToken: token.RefreshToken,
+	}
+
+	user.Expiry, _ = types.ParseDateTime(token.Expiry)
+
+	return user, nil
+}