Adding upstream version 0.28.1.

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

tools/auth/mailcow.go

@@ -0,0 +1,84 @@
+package auth
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"strings"
+
+	"github.com/pocketbase/pocketbase/tools/types"
+	"golang.org/x/oauth2"
+)
+
+func init() {
+	Providers[NameMailcow] = wrapFactory(NewMailcowProvider)
+}
+
+var _ Provider = (*Mailcow)(nil)
+
+// NameMailcow is the unique name of the mailcow provider.
+const NameMailcow string = "mailcow"
+
+// Mailcow allows authentication via mailcow OAuth2.
+type Mailcow struct {
+	BaseProvider
+}
+
+// NewMailcowProvider creates a new mailcow provider instance with some defaults.
+func NewMailcowProvider() *Mailcow {
+	return &Mailcow{BaseProvider{
+		ctx:         context.Background(),
+		displayName: "mailcow",
+		pkce:        true,
+		scopes:      []string{"profile"},
+	}}
+}
+
+// FetchAuthUser returns an AuthUser instance based on mailcow's user api.
+//
+// API reference: https://github.com/mailcow/mailcow-dockerized/blob/master/data/web/oauth/profile.php
+func (p *Mailcow) 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 `json:"id"`
+		Username string `json:"username"`
+		Email    string `json:"email"`
+		FullName string `json:"full_name"`
+		Active   int    `json:"active"`
+	}{}
+	if err := json.Unmarshal(data, &extracted); err != nil {
+		return nil, err
+	}
+
+	if extracted.Active != 1 {
+		return nil, errors.New("the mailcow user is not active")
+	}
+
+	user := &AuthUser{
+		Id:           extracted.Id,
+		Name:         extracted.FullName,
+		Username:     extracted.Username,
+		Email:        extracted.Email,
+		RawUser:      rawUser,
+		AccessToken:  token.AccessToken,
+		RefreshToken: token.RefreshToken,
+	}
+
+	user.Expiry, _ = types.ParseDateTime(token.Expiry)
+
+	// mailcow usernames are usually just the email adresses, so we just take the part in front of the @
+	if strings.Contains(user.Username, "@") {
+		user.Username = strings.Split(user.Username, "@")[0]
+	}
+
+	return user, nil
+}