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

    var $validators = array();

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

    function __construct($fields=array(), $source=null, $options=array()) {
        $this->fields = $fields;
        foreach ($fields as $k=>$f) {
            $f->setForm($this);
            if (!$f->get('name') && $k)
                $f->set('name', $k);
        }
        if (isset($options['title']))
            $this->title = $options['title'];
        if (isset($options['instructions']))
            $this->instructions = $options['instructions'];
        // Use POST data if source was not specified
        $this->_source = ($source) ? $source : $_POST;
    }
    function data($source) {
        foreach ($this->fields as $name=>$f)
            if (isset($source[$name]))
                $f->value = $source[$name];
    }

    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 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();
            $this->getClean();
            // Validate the whole form so that errors can be added to the
            // individual fields and collected below.
            foreach ($this->validators as $V) {
                $V($this);
            }
            foreach ($this->getFields() as $field)
                if ($field->errors() && (!$include || $include($field)))
                    $this->_errors[$field->get('id')] = $field->errors();
        }
        return !$this->_errors;
    }

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

                $this->_clean[$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) {
        $this->_errors['form'][] = $message;
    }

    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 = $this;
        if ($staff)
            include(STAFFINC_DIR . 'templates/dynamic-form.tmpl.php');
        else
            include(CLIENTINC_DIR . 'templates/dynamic-form.tmpl.php');
    }

    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);

                        $dedup[$key] = true;
                    }
                }
            }
        }
    }

    static function emitMedia($url, $type) {
        if ($url[0] == '/')
            $url = ROOT_PATH . substr($url, 1);

        switch (strtolower($type)) {
        case 'css': ?>
        <link rel="stylesheet" type="text/css" href="<?php echo $url; ?>"/><?php
            break;
        case 'js': ?>
        <script type="text/javascript" src="<?php echo $url; ?>"></script><?php
            break;
        }
    }

    /**
     * getState
     *
     * Retrieves an array of information which can be passed to the
     * ::loadState method later to recreate the current state of the form
     * fields and values.
     */
    function getState() {
        $info = array();
        foreach ($this->getFields() as $f) {
            // Skip invisible fields
            if (!$f->isVisible())
                continue;

            // Skip fields set to default values
            $v = $f->getClean();
            $d = $f->get('default');
            if ($v == $d)
                continue;

            // Skip empty values
            if (!$v)
                continue;

            $info[$f->get('name') ?: $f->get('id')] = $f->to_database($v);
        }
        return $info;
    }

    /**
     * loadState
     *
     * Reset this form to the state previously recorded by the ::getState()
     * method