Function RetrieveUserProfile

appservice/api/query.go:83–134

RetrieveUserProfile is a wrapper that queries both the local database and application services for a given user's profile TODO: Remove this, it's called from federationapi and clientapi but is a pure function

(
	ctx context.Context,
	userID string,
	asAPI AppServiceInternalAPI,
	profileAPI userapi.ClientUserAPI,
)

// application services for a given user's profile
// TODO: Remove this, it's called from federationapi and clientapi but is a pure function
func RetrieveUserProfile(
	ctx context.Context,
	userID string,
	asAPI AppServiceInternalAPI,
	profileAPI userapi.ClientUserAPI,
) (*authtypes.Profile, error) {
	localpart, _, err := gomatrixserverlib.SplitID('@', userID)
	if err != nil {
		return nil, err
	}

	// Try to query the user from the local database
	res := &userapi.QueryProfileResponse{}
	err = profileAPI.QueryProfile(ctx, &userapi.QueryProfileRequest{UserID: userID}, res)
	if err != nil {
		return nil, err
	}
	profile := &authtypes.Profile{
		Localpart:   localpart,
		DisplayName: res.DisplayName,
		AvatarURL:   res.AvatarURL,
		TelNumbers:  res.TelNumbers,
	}
	if res.UserExists {
		return profile, nil
	}

	// Query the appservice component for the existence of an AS user
	userReq := UserIDExistsRequest{UserID: userID}
	var userResp UserIDExistsResponse
	if err = asAPI.UserIDExists(ctx, &userReq, &userResp); err != nil {
		return nil, err
	}

	// If no user exists, return
	if !userResp.UserIDExists {
		return nil, errors.New("no known profile for given user ID")
	}

	// Try to query the user from the local database again
	err = profileAPI.QueryProfile(ctx, &userapi.QueryProfileRequest{UserID: userID}, res)
	if err != nil {
		return nil, err
	}

	// profile should not be nil at this point
	return &authtypes.Profile{
		Localpart:   localpart,
		DisplayName: res.DisplayName,
		AvatarURL:   res.AvatarURL,
	}, nil
}