// Copyright 2023, 2024, 2025 The Forgejo Authors. All rights reserved.// SPDX-License-Identifier: MIT package forgefed import (	"fmt"	"net/url"	"strconv"	"strings" 	"forgejo.org/modules/validation") // ----------------------------- ActorID --------------------------------------------type ActorID struct {	ID                 string	Source             string	HostSchema         string	Path               string	Host               string	HostPort           uint16	UnvalidatedInput   string	IsPortSupplemented bool} // Factory function for ActorID. Created struct is asserted to be validfunc NewActorID(uri string) (ActorID, error) {	result, err := newActorID(uri)	if err != nil {		return ActorID{}, err	} 	if valid, err := validation.IsValid(result); !valid {		return ActorID{}, err	} 	return result, nil} func (id ActorID) AsURI() string {	var result, path string 	if id.Path == "" {		path = id.ID	} else {		path = fmt.Sprintf("%s/%s", id.Path, id.ID)	} 	if id.IsPortSupplemented {		result = fmt.Sprintf("%s://%s/%s", id.HostSchema, id.Host, path)	} else {		result = fmt.Sprintf("%s://%s:%d/%s", id.HostSchema, id.Host, id.HostPort, path)	} 	return result} func (id ActorID) Validate() []string {	var result []string	result = append(result, validation.ValidateNotEmpty(id.ID, "ID")...)	result = append(result, validation.ValidateNotEmpty(id.Host, "host")...)	result = append(result, validation.ValidateNotEmpty(id.HostPort, "hostPort")...)	result = append(result, validation.ValidateNotEmpty(id.HostSchema, "hostSchema")...)	result = append(result, validation.ValidateNotEmpty(id.UnvalidatedInput, "unvalidatedInput")...) 	if id.UnvalidatedInput != id.AsURI() {		result = append(result, fmt.Sprintf("not all input was parsed, \nUnvalidated Input:%q \nParsed URI: %q", id.UnvalidatedInput, id.AsURI()))	} 	return result} func newActorID(uri string) (ActorID, error) {	validatedURI, err := url.ParseRequestURI(uri)	if err != nil {		return ActorID{}, err	}	pathWithActorID := strings.Split(validatedURI.Path, "/")	if containsEmptyString(pathWithActorID) {		pathWithActorID = removeEmptyStrings(pathWithActorID)	}	length := len(pathWithActorID)	pathWithoutActorID := strings.Join(pathWithActorID[0:length-1], "/")	id := strings.ToLower(pathWithActorID[length-1]) 	result := ActorID{}	result.ID = id	result.HostSchema = strings.ToLower(validatedURI.Scheme)	result.Host = strings.ToLower(validatedURI.Hostname())	result.Path = strings.ToLower(pathWithoutActorID) 	if validatedURI.Port() == "" && result.HostSchema == "https" {		result.IsPortSupplemented = true		result.HostPort = 443	} else if validatedURI.Port() == "" && result.HostSchema == "http" {		result.IsPortSupplemented = true		result.HostPort = 80	} else {		numPort, _ := strconv.ParseUint(validatedURI.Port(), 10, 16)		result.HostPort = uint16(numPort)	} 	result.UnvalidatedInput = strings.ToLower(uri) 	return result, nil} func containsEmptyString(ar []string) bool {	for _, elem := range ar {		if elem == "" {			return true		}	}	return false} func removeEmptyStrings(ls []string) []string {	var rs []string	for _, str := range ls {		if str != "" {			rs = append(rs, str)		}	}	return rs}