class.forms.php

<?php
/*********************************************************************
    class.forms.php

    osTicket forms framework

    Jared Hancock <jared@osticket.com>
    Copyright (c)  2006-2013 osTicket
    http://www.osticket.com

    Released under the GNU General Public License WITHOUT ANY WARRANTY.
    See LICENSE.TXT for details.

    vim: expandtab sw=4 ts=4 sts=4:
**********************************************************************/

/**
 * Form template, used for designing the custom form and for entering custom
 * data for a ticket
 */
class Form {
    static $renderer = 'GridFluidLayout';
    static $id = 0;

    var $fields = array();
    var $title = '';
    var $instructions = '';

    var $validators = array();

    var $_errors = null;
    var $_source = false;

    function __construct($source=null, $options=array()) {

        if (isset($options['title']))
            $this->title = $options['title'];
        if (isset($options['instructions']))
            $this->instructions = $options['instructions'];
        if (isset($options['id']))
            $this->id = $options['id'];

        // Use POST data if source was not specified
        $this->_source = ($source) ? $source : $_POST;
    }

    function getId() {
        return static::$id;
    }

    function data($source) {
        foreach ($this->fields as $name=>$f)
            if (isset($source[$name]))
                $f->value = $source[$name];
    }

    function setFields($fields) {

        if (!is_array($fields) && !$fields instanceof Traversable)
            return;

        $this->fields = $fields;
        foreach ($fields as $k=>$f) {
            $f->setForm($this);
            if (!$f->get('name') && $k && !is_numeric($k))
                $f->set('name', $k);
        }
    }

    function getFields() {
        return $this->fields;
    }

    function getField($name) {
        $fields = $this->getFields();
        foreach($fields as $f)
            if(!strcasecmp($f->get('name'), $name))
                return $f;
        if (isset($fields[$name]))
            return $fields[$name];
    }

    function hasField($name) {
        return $this->getField($name);
    }

    function getTitle() { return $this->title; }
    function getInstructions() { return $this->instructions; }
    function getSource() { return $this->_source; }
    function setSource($source) { $this->_source = $source; }

    /**
     * Validate the form and indicate if there no errors.
     *
     * Parameters:
     * $filter - (callback) function to receive each field and return
     *      boolean true if the field's errors are significant
     */
    function isValid($include=false) {
        if (!isset($this->_errors)) {
            $this->_errors = array();
            $this->validate($this->getClean());
            foreach ($this->getFields() as $field)
                if ($field->errors() && (!$include || $include($field)))
                    $this->_errors[$field->get('id')] = $field->errors();
        }
        return !$this->_errors;
    }

    function validate($clean_data) {
        // Validate the whole form so that errors can be added to the
        // individual fields and collected below.
        foreach ($this->validators as $V) {
            $V($this);
        }
    }

    function getClean() {
        if (!$this->_clean) {
            $this->_clean = array();
            foreach ($this->getFields() as $key=>$field) {
                if (!$field->hasData())
                    continue;

                // Prefer indexing by field.id if indexing numerically
                if (is_int($key) && $field->get('id'))
                    $key = $field->get('id');
                $this->_clean[$key] = $this->_clean[$field->get('name')]
                    = $field->getClean();
            }
            unset($this->_clean[""]);
        }
        return $this->_clean;
    }

    function errors($formOnly=false) {
        return ($formOnly) ? $this->_errors['form'] : $this->_errors;
    }

    function addError($message, $index=false) {

        if ($index)
            $this->_errors[$index] = $message;
        else
            $this->_errors['form'][] = $message;
    }

    function addErrors($errors=array()) {
        foreach ($errors as $k => $v) {
            if (($f=$this->getField($k)))
                $f->addError($v);
            else
                $this->addError($v, $k);
        }
    }

    function addValidator($function) {
        if (!is_callable($function))
            throw new Exception('Form validator must be callable');
        $this->validators[] = $function;
    }

    function render($staff=true, $title=false, $options=array()) {
        if ($title)
            $this->title = $title;
        if (isset($options['instructions']))
            $this->instructions = $options['instructions'];
        $form = $this;
        $template = $options['template'] ?: 'dynamic-form.tmpl.php';
        if ($staff)
            include(STAFFINC_DIR . 'templates/' . $template);
        else
            include(CLIENTINC_DIR . 'templates/' . $template);
        echo $this->getMedia();
    }

    function getLayout() {
        $rc = @$options['renderer'] ?: static::$renderer;
        return new $rc($title, $options);
    }

    function asTable($options=array()) {
        return $this->getLayout()->asTable($this);
        // XXX: Media can't go in a table
        echo $this->getMedia();
    }

    function getMedia() {
        static $dedup = array();

        foreach ($this->getFields() as $f) {
            if (($M = $f->getMedia()) && is_array($M)) {
                foreach ($M as $type=>$files) {
                    foreach ($files as $url) {
                        $key = strtolower($type.$url);
                        if (isset($dedup[$key]))
                            continue;

                        self::emitMedia($url, $type);