<?php

class Invoice extends mfBaseModel {
    private $positions;
    private $voicenumbers;

    public function getProperty($name) {
        if($this->$name == null) {

            if(!$this->id) {
                return null;
            }


            if($name == "positions") {
                $positions = InvoicepositionModel::search(["invoice_id" => $this->id]);
                $this->positions = $positions;
                return $this->positions;
            }

            if($name == "voicenumbers") {
                $voicenumbers = InvoiceVoicenumberModel::search(["invoice_id" => $this->id]);
                $this->voicenumbers = $voicenumbers;
                return $this->voicenumbers;
            }

            if($name == "creator") {
                $this->creator = mfValuecache::singleton()->get("Worker-id-".$this->create_by);
                if($this->creator === null) {
                    $this->creator = new User($this->create_by);
                    if($this->creator->id) {
                        mfValuecache::singleton()->set("Worker-id-".$this->create_by, $this->creator);
                    }
                }
                return $this->creator;
            }

            if($name == "editor") {
                $this->editor = mfValuecache::singleton()->get("Worker-id-".$this->edit_by);
                if($this->editor === null) {
                    $this->editor = new User($this->edit_by);
                    if($this->editor->id) {
                        mfValuecache::singleton()->set("Worker-id-".$this->edit_by, $this->editor);
                    }
                }
                return $this->editor;
            }

            $classname = ucfirst($name);
            $idfield = $name."_id";
            $this->$name = mfValuecache::singleton()->get("mfObjectmodel-$name-".$this->$idfield);
            if(!$this->$name) {
                $this->$name = new $classname($this->$idfield);
            }

            if($this->$name->id) {
                mfValuecache::singleton()->set("mfObjectmodel-$name-".$this->$name->id, $this->$name);
                return $this->$name;
            } else {
                return null;
            }

        }

        return $this->$name;
    }
}