class.forms.php

    static function getFileTypes() {
        static $filetypes;

        if (!isset($filetypes)) {
            if (function_exists('apcu_fetch')) {
                $key = md5(SECRET_SALT . GIT_VERSION . 'filetypes');
                $filetypes = apcu_fetch($key);
            }
            if (!$filetypes)
                $filetypes = YamlDataParser::load(INCLUDE_DIR . '/config/filetype.yaml');
            if ($key)
                apcu_store($key, $filetypes, 7200);
        }
        return $filetypes;
    }

    function getConfigurationOptions() {
        // Compute size selections
        $sizes = array('262144' => '— '.__('Small').' —');
        $next = 512 << 10;
        $max = strtoupper(ini_get('upload_max_filesize'));
        $limit = (int) $max;
        if (!$limit) $limit = 2 << 20; # 2M default value
        elseif (strpos($max, 'K')) $limit <<= 10;
        elseif (strpos($max, 'M')) $limit <<= 20;
        elseif (strpos($max, 'G')) $limit <<= 30;
        while ($next <= $limit) {
            // Select the closest, larger value (in case the
            // current value is between two)
            $sizes[$next] = Format::file_size($next);
            $next *= 2;
        }
        // Add extra option if top-limit in php.ini doesn't fall
        // at a power of two
        if ($next < $limit * 2)
            $sizes[$limit] = Format::file_size($limit);

        $types = array();
        foreach (self::getFileTypes() as $type=>$info) {
            $types[$type] = $info['description'];
        }

        global $cfg;
        return array(
            'size' => new ChoiceField(array(
                'label'=>__('Maximum File Size'),
                'hint'=>__('Choose maximum size of a single file uploaded to this field'),
                'default'=>$cfg->getMaxFileSize(),
                'choices'=>$sizes
            )),
            'mimetypes' => new ChoiceField(array(
                'label'=>__('Restrict by File Type'),
                'hint'=>__('Optionally, choose acceptable file types.'),
                'required'=>false,
                'choices'=>$types,
                'configuration'=>array('multiselect'=>true,'prompt'=>__('No restrictions'))
            )),
            'extensions' => new TextareaField(array(
                'label'=>__('Additional File Type Filters'),
                'hint'=>__('Optionally, enter comma-separated list of additional file types, by extension. (e.g .doc, .pdf).'),
                'configuration'=>array('html'=>false, 'rows'=>2),
            )),
            'max' => new TextboxField(array(
                'label'=>__('Maximum Files'),
                'hint'=>__('Users cannot upload more than this many files.'),
                'default'=>false,
                'required'=>false,
                'validator'=>'number',
                'configuration'=>array('size'=>8, 'length'=>4, 'placeholder'=>__('No limit')),
            ))
        );
    }

    /**
     * Called from the ajax handler for async uploads via web clients.
     */
    function ajaxUpload($bypass=false) {
        $config = $this->getConfiguration();

        $files = AttachmentFile::format($_FILES['upload'],
            // For numeric fields assume configuration exists
            !is_numeric($this->get('id')));
        if (count($files) != 1)
            Http::response(400, 'Send one file at a time');
        $file = array_shift($files);
        $file['name'] = urldecode($file['name']);

        if (!$bypass && !$this->isValidFileType($file['name'], $file['type']))
            Http::response(415, 'File type is not allowed');

        $config = $this->getConfiguration();
        if (!$bypass && $file['size'] > $config['size'])
            Http::response(413, 'File is too large');

        if (!($F = AttachmentFile::upload($file)))
            Http::response(500, 'Unable to store file: '. $file['error']);

        $id = $F->getId();

        // This file is allowed for attachment in this session
        $_SESSION[':uploadedFiles'][$id] = 1;

        return $id;
    }

    /**
     * Called from FileUploadWidget::getValue() when manual upload is used
     * for browsers which do not support the HTML5 way of uploading async.
     */
    function uploadFile($file) {
        if (!$this->isValidFileType($file['name'], $file['type']))
            throw new FileUploadError(__('File type is not allowed'));

        $config = $this->getConfiguration();
        if ($file['size'] > $config['size'])
            throw new FileUploadError(__('File size is too large'));

        return AttachmentFile::upload($file);
    }

    /**
     * Called from API and email routines and such to handle attachments
     * sent other than via web upload
     */
    function uploadAttachment(&$file) {
        if (!$this->isValidFileType($file['name'], $file['type']))
            throw new FileUploadError(__('File type is not allowed'));

        if (is_callable($file['data']))
            $file['data'] = $file['data']();
        if (!isset($file['size'])) {
            // bootstrap.php include a compat version of mb_strlen
            if (extension_loaded('mbstring'))
                $file['size'] = mb_strlen($file['data'], '8bit');
            else
                $file['size'] = strlen($file['data']);
        }

        $config = $this->getConfiguration();
        if ($file['size'] > $config['size'])
            throw new FileUploadError(__('File size is too large'));

        if (!$F = AttachmentFile::create($file))
            throw new FileUploadError(__('Unable to save file'));

        return $F;
    }

    function isValidFileType($name, $type=false) {
        $config = $this->getConfiguration();

        // Check MIME type - file ext. shouldn't be solely trusted.
        if ($type && $config['__mimetypes']
                && in_array($type, $config['__mimetypes']))
            return true;

        // Return true if all file types are allowed (.*)
        if (!$config['__extensions'] || in_array('.*', $config['__extensions']))
            return true;

        $allowed = $config['__extensions'];
        $ext = strtolower(pathinfo($name, PATHINFO_EXTENSION));

        return ($ext && is_array($allowed) && in_array(".$ext", $allowed));
    }

    function getFiles() {
        if (!isset($this->attachments) && ($a = $this->getAnswer())
            && ($e = $a->getEntry()) && ($e->get('id'))
        ) {
            $this->attachments = GenericAttachments::forIdAndType(
                // Combine the field and entry ids to make the key
                sprintf('%u', abs(crc32('E'.$this->get('id').$e->get('id')))),
                'E');
        }
        return $this->attachments ?: array();
    }

    function setAttachments(GenericAttachments $att) {
        $this->attachments = $att;
    }

    function getConfiguration() {
        $config = parent::getConfiguration();
        $_types = self::getFileTypes();
        $mimetypes = array();
        $extensions = array();
        if (isset($config['mimetypes']) && is_array($config['mimetypes'])) {
            foreach ($config['mimetypes'] as $type=>$desc) {
                foreach ($_types[$type]['types'] as $mime=>$exts) {
                    $mimetypes[$mime] = true;
                    if (is_array($exts))
                        foreach ($exts as $ext)
                            $extensions['.'.$ext] = true;
                }
            }
        }
        if (strpos($config['extensions'], '.*') !== false)
            $config['extensions'] = '';

        if (is_string($config['extensions'])) {
            foreach (preg_split('/\s+/', str_replace(',',' ', $config['extensions'])) as $ext) {
                if (!$ext) {
                    continue;
                }
                elseif (strpos($ext, '/')) {
                    $mimetypes[$ext] = true;
                }
                else {
                    if ($ext[0] != '.')
                        $ext = '.' . $ext;

                    // Ensure that the extension is lower-cased for comparison latr
                    $ext = strtolower($ext);

                    // Add this to the MIME types list so it can be exported to
                    // the @accept attribute
                    if (!isset($extensions[$ext]))
                        $mimetypes[$ext] = true;

                    $extensions[$ext] = true;
                }
            }
            $config['__extensions'] = array_keys($extensions);
        }
        elseif (is_array($config['extensions'])) {
            $config['__extensions'] = $config['extensions'];
        }

        // 'mimetypes' is the array represented from the user interface,
        // '__mimetypes' is a complete list of supported MIME types.
        $config['__mimetypes'] = array_keys($mimetypes);
        return $config;
    }

    // When the field is saved to database, encode the ID listing as a json
    // array. Then, inspect the difference between the files actually
    // attached to this field
    function to_database($value) {
        $this->getFiles();
        if (isset($this->attachments)) {
            $this->attachments->keepOnlyFileIds($value);
        }
        return JsonDataEncoder::encode($value);
    }

    function parse($value) {
        // Values in the database should be integer file-ids
        return array_map(function($e) { return (int) $e; },
            $value ?: array());
    }

    function to_php($value) {
        return is_array($value) ? $value : JsonDataParser::decode($value);
    }

    function display($value) {
        $links = array();
        foreach ($this->getFiles() as $f) {
            $links[] = sprintf('<a class="no-pjax" href="%s">%s</a>',
                Format::htmlchars($f->file->getDownloadUrl()),
                Format::htmlchars($f->file->name));
        }
        return implode('<br/>', $links);
    }

    function toString($value) {
        $files = array();
        foreach ($this->getFiles() as $f) {
            $files[] = $f->file->name;
        }
        return implode(', ', $files);
    }

    function db_cleanup($field=false) {
        // Delete associated attachments from the database, if any
        $this->getFiles();
        if (isset($this->attachments)) {
            $this->attachments->deleteAll();
        }
    }

    function asVar($value, $id=false) {
        return new FileFieldAttachments($this->getFiles());
    }
    function asVarType() {
        return 'FileFieldAttachments';
    }

    function whatChanged($before, $after) {
        $B = (array) $before;
        $A = (array) $after;
        $added = array_diff($A, $B);
        $deleted = array_diff($B, $A);
        $added = Format::htmlchars(array_keys($added));
        $deleted = Format::htmlchars(array_keys($deleted));

        if ($added && $deleted) {
            $desc = sprintf(
                __('added <strong>%1$s</strong> and removed <strong>%2$s</strong>'),
                implode(', ', $added), implode(', ', $deleted));
        }
        elseif ($added) {
            $desc = sprintf(
                __('added <strong>%1$s</strong>'),
                implode(', ', $added));
        }
        elseif ($deleted) {
            $desc = sprintf(
                __('removed <strong>%1$s</strong>'),
                implode(', ', $deleted));
        }
        else {
            $desc = sprintf(
                __('changed from <strong>%1$s</strong> to <strong>%2$s</strong>'),
                $this->display($before), $this->display($after));
        }
        return $desc;
    }
}

class FileFieldAttachments {
    var $files;

    function __construct($files) {
        $this->files = $files;
    }

    function __toString() {
        $files = array();
        foreach ($this->files as $f) {
            $files[] = $f->file->name;
        }
        return implode(', ', $files);
    }

    function getVar($tag) {
        switch ($tag) {
        case 'names':
            return $this->__toString();
        case 'files':
            throw new OOBContent(OOBContent::FILES, $this->files->all());
        }
    }

    static function getVarScope() {
        return array(
            'names' => __('List of file names'),
            'files' => __('Attached files'),
        );
    }
}

class ColorChoiceField extends FormField {
    static $widget = 'ColorPickerWidget';
}

class InlineFormData extends ArrayObject {
    var $_form;

    function __construct($form, array $data=array()) {
        parent::__construct($data);
        $this->_form = $form;
    }

    function getVar($tag) {
        foreach ($this->_form->getFields() as $f) {
            if ($f->get('name') == $tag)
                return $this[$f->get('id')];
        }
    }
}


class InlineFormField extends FormField {
    static $widget = 'InlineFormWidget';

    var $_iform = null;

    function validateEntry($value) {
        if (!$this->getInlineForm()->isValid()) {
            $this->_errors[] = __('Correct any errors below and try again.');
        }
    }

    function parse($value) {
        // The InlineFieldWidget returns an array of cleaned data
        return $value;
    }

    function to_database($value) {
        return JsonDataEncoder::encode($value);
    }

    function to_php($value) {
        $data = JsonDataParser::decode($value);
        // The InlineFormData helps with the variable replacer API
        return new InlineFormData($this->getInlineForm(), $data);
    }

    function display($data) {
        $form = $this->getInlineForm();
        ob_start(); ?>
        <div><?php
        foreach ($form->getFields() as $field) { ?>
            <span style="display:inline-block;padding:0 5px;vertical-align:top">
                <strong><?php echo Format::htmlchars($field->get('label')); ?></strong>
                <div><?php
                    $value = $data[$field->get('id')];
                    echo $field->display($value); ?></div>
            </span><?php
        } ?>
        </div><?php
        return ob_get_clean();
    }

    function getInlineForm($data=false) {
        $form = $this->get('form');
        if (is_array($form)) {
            $form = new SimpleForm($form, $data ?: $this->value ?: $this->getSource());
            // Ensure unique, but predictable form and field IDs
            $form->setId(sprintf('%u', crc32($this->get('name')) >> 1));
        }
        return $form;
    }
}

class InlineDynamicFormField extends FormField {
    function getInlineForm($data=false) {
        if (!isset($this->_iform) || $data) {
            $config = $this->getConfiguration();
            $this->_iform = DynamicForm::lookup($config['form']);
            if ($data)
                $this->_iform = $this->_iform->getForm($data);
        }
        return $this->_iform;
    }

    function getConfigurationOptions() {
        $forms = DynamicForm::objects()->filter(array('type'=>'G'))
            ->values_flat('id', 'title');
        $choices = array();
        foreach ($forms as $row) {
            list($id, $title) = $row;
            $choices[$id] = $title;
        }
        return array(
            'form' => new ChoiceField(array(
                'id'=>2, 'label'=>'Inline Form', 'required'=>true,
                'default'=>'', 'choices'=>$choices
            )),
        );
    }
}

class InlineFormWidget extends Widget {
    function render($mode=false) {
        $form = $this->field->getInlineForm();
        if (!$form)
            return;
        // Handle first-step edits -- load data from $this->value
        if ($form instanceof DynamicForm && !$form->getSource())
            $form = $form->getForm($this->value);
        $inc = ($mode == 'client') ? CLIENTINC_DIR : STAFFINC_DIR;
        include $inc . 'templates/inline-form.tmpl.php';
    }

    function getValue() {
        $data = $this->field->getSource();
        if (!$data)
            return null;
        $form = $this->field->getInlineForm($data);
        if (!$form)
            return null;
        return $form->getClean();
    }
}

class Widget {
    static $media = null;

    function __construct($field) {
        $this->field = $field;
        $this->name = $field->getFormName();
        $this->id = '_' . $this->name;
    }

    function parseValue() {
        $this->value = $this->getValue();
        if (!isset($this->value) && is_object($this->field->getAnswer()))
            $this->value = $this->field->getAnswer()->getValue();
        if (!isset($this->value) && isset($this->field->value))
            $this->value = $this->field->value;
    }

    function getValue() {
        $data = $this->field->getSource();
        // Search for HTML form name first
        if (isset($data[$this->name]))
            return $data[$this->name];
        elseif (isset($data[$this->field->get('name')]))
            return $data[$this->field->get('name')];
        elseif (isset($data[$this->field->get('id')]))
            return $data[$this->field->get('id')];
        return null;
    }

    /**
     * getJsValueGetter
     *
     * Used with the dependent fields feature, this function should return a
     * single javascript expression which can be used in a larger expression
     * (<> == true, where <> is the result of this function). The %s token
     * will be replaced with a jQuery variable representing this widget.
     */
    function getJsValueGetter() {
        return '%s.val()';
    }
}

class TextboxWidget extends Widget {
    static $input_type = 'text';

    function render($options=array(), $extraConfig=false) {
        $config = $this->field->getConfiguration();
        if (is_array($extraConfig)) {
            foreach ($extraConfig as $k=>$v)
                if (!isset($config[$k]) || !$config[$k])
                    $config[$k] = $v;
        }
        if (isset($config['size']))
            $size = "size=\"{$config['size']}\"";
        if (isset($config['length']) && $config['length'])
            $maxlength = "maxlength=\"{$config['length']}\"";
        if (isset($config['classes']))
            $classes = 'class="'.$config['classes'].'"';
        if (isset($config['autocomplete']))
            $autocomplete = 'autocomplete="'.($config['autocomplete']?'on':'off').'"';
        if (isset($config['autofocus']))
            $autofocus = 'autofocus';
        if (isset($config['disabled']))
            $disabled = 'disabled="disabled"';
        if (isset($config['translatable']) && $config['translatable'])
            $translatable = 'data-translate-tag="'.$config['translatable'].'"';
        $type = static::$input_type;
        $types = array(
            'email' => 'email',
            'phone' => 'tel',
        );
        if ($type == 'text' && isset($types[$config['validator']]))
            $type = $types[$config['validator']];
        $placeholder = sprintf('placeholder="%s"', $this->field->getLocal('placeholder',
            $config['placeholder']));
        ?>
        <input type="<?php echo $type; ?>"
            id="<?php echo $this->id; ?>"
            <?php echo implode(' ', array_filter(array(
                $size, $maxlength, $classes, $autocomplete, $disabled,
                $translatable, $placeholder, $autofocus))); ?>
            name="<?php echo $this->name; ?>"
            value="<?php echo Format::htmlchars($this->value); ?>"/>
        <?php
    }
}


class TextboxSelectionWidget extends TextboxWidget {
    //TODO: Support multi-input e.g comma separated inputs
    function render($options=array(), $extraConfig=array()) {

        if ($this->value && is_array($this->value))
            $this->value = current($this->value);

        parent::render($options);
    }

    function getValue() {

        $value = parent::getValue();
        if ($value && ($item=$this->field->lookupChoice((string) $value)))
            $value = $item;

        return $value;
    }
}

class PasswordWidget extends TextboxWidget {
    static $input_type = 'password';

    function render($mode=false, $extra=false) {
        $extra = array();
        if ($this->field->value) {
            $extra['placeholder'] = '••••••••••••';
        }
        return parent::render($mode, $extra);
    }

    function parseValue() {
        parent::parseValue();
        // Show empty box unless failed POST
        if ($_SERVER['REQUEST_METHOD'] != 'POST'
                || !$this->field->getForm()->isValid())
            $this->value = '';
    }
}

class TextareaWidget extends Widget {
    function render($options=array()) {
        $config = $this->field->getConfiguration();
        $class = $cols = $rows = $maxlength = "";
        $attrs = array();
        if (isset($config['rows']))
            $rows = "rows=\"{$config['rows']}\"";
        if (isset($config['cols']))
            $cols = "cols=\"{$config['cols']}\"";
        if (isset($config['length']) && $config['length'])
            $maxlength = "maxlength=\"{$config['length']}\"";
        if (isset($config['html']) && $config['html']) {
            $class = array('richtext', 'no-bar');
            $class[] = @$config['size'] ?: 'small';
            $class = sprintf('class="%s"', implode(' ', $class));
            $this->value = Format::viewableImages($this->value);
        }
        if (isset($config['context']))
            $attrs['data-root-context'] = '"'.$config['context'].'"';
        ?>
        <span style="display:inline-block;width:100%">
        <textarea <?php echo $rows." ".$cols." ".$maxlength." ".$class
                .' '.Format::array_implode('=', ' ', $attrs)
                .' placeholder="'.$config['placeholder'].'"'; ?>
            id="<?php echo $this->id; ?>"
            name="<?php echo $this->name; ?>"><?php
                echo Format::htmlchars($this->value);
            ?></textarea>
        </span>
        <?php
    }

    function parseValue() {
        parent::parseValue();
        if (isset($this->value)) {
            $value = $this->value;
            $config = $this->field->getConfiguration();
            // Trim empty spaces based on text input type.
            // Preserve original input if not empty.
            if ($config['html'])
                $this->value = trim($value, " <>br/\t\n\r") ? $value : '';
            else
                $this->value = trim($value) ? $value : '';
        }
    }

}

class PhoneNumberWidget extends Widget {
    function render($options=array()) {
        $config = $this->field->getConfiguration();
        list($phone, $ext) = explode("X", $this->value);
        ?>
        <input id="<?php echo $this->id; ?>" type="tel" name="<?php echo $this->name; ?>" value="<?php
        echo Format::htmlchars($phone); ?>"/><?php
        // Allow display of extension field even if disabled if the phone
        // number being edited has an extension
        if ($ext || $config['ext']) { ?> <?php echo __('Ext'); ?>:
            <input type="text" name="<?php
            echo $this->name; ?>-ext" value="<?php echo Format::htmlchars($ext);
                ?>" size="5"/>
        <?php }
    }

    function getValue() {
        $data = $this->field->getSource();
        $base = parent::getValue();
        if ($base === null)
            return $base;
        $ext = $data["{$this->name}-ext"];
        // NOTE: 'X' is significant. Don't change it
        if ($ext) $ext = 'X'.$ext;
        return $base . $ext;
    }
}

class ChoicesWidget extends Widget {
    function render($options=array()) {

        $mode = null;
        if (isset($options['mode']))
            $mode = $options['mode'];
        elseif (isset($this->field->options['render_mode']))
            $mode = $this->field->options['render_mode'];

        if ($mode == 'view') {
            if (!($val = (string) $this->field))
                $val = sprintf('<span class="faded">%s</span>', __('None'));

            echo $val;
            return;
        }

        $config = $this->field->getConfiguration();
        if ($mode == 'search') {
            $config['multiselect'] = true;
        }

        // Determine the value for the default (the one listed if nothing is
        // selected)
        $choices = $this->field->getChoices(true);
        $prompt = ($config['prompt'])
            ? $this->field->getLocal('prompt', $config['prompt'])
            : __('Select'
            /* Used as a default prompt for a custom drop-down list */);

        $have_def = false;
        // We don't consider the 'default' when rendering in 'search' mode
        if (!strcasecmp($mode, 'search')) {
            $def_val = $prompt;
        } else {
            $def_key = $this->field->get('default');
            if (!$def_key && $config['default'])
                $def_key = $config['default'];
            if (is_array($def_key))
                $def_key = key($def_key);
            $have_def = isset($choices[$def_key]);
            $def_val = $have_def ? $choices[$def_key] : $prompt;
        }

        $values = $this->value;
        if (!is_array($values) && isset($values)) {
            $values = array($values => $this->field->getChoice($values));
        }

        if (!is_array($values))
            $values = $have_def ? array($def_key => $choices[$def_key]) : array();

        if (isset($config['classes']))
            $classes = 'class="'.$config['classes'].'"';
        ?>
        <select name="<?php echo $this->name; ?>[]"
            <?php echo implode(' ', array_filter(array($classes))); ?>
            id="<?php echo $this->id; ?>"
            <?php if (isset($config['data']))
              foreach ($config['data'] as $D=>$V)
                echo ' data-'.$D.'="'.Format::htmlchars($V).'"';
            ?>
            data-placeholder="<?php echo $prompt; ?>"
            <?php if ($config['multiselect'])
                echo ' multiple="multiple"'; ?>>
            <?php if (!$have_def && !$config['multiselect']) { ?>
            <option value="<?php echo $def_key; ?>">&mdash; <?php
                echo $def_val; ?> &mdash;</option>
<?php
        }
        $this->emitChoices($choices, $values, $have_def, $def_key); ?>
        </select>
        <?php
        if ($config['multiselect']) {
         ?>
        <script type="text/javascript">
        $(function() {
            $("#<?php echo $this->id; ?>")
            .select2({'minimumResultsForSearch':10, 'width': '350px'});
        });
        </script>
       <?php
        }
    }

    function emitChoices($choices, $values=array(), $have_def=false, $def_key=null) {
        reset($choices);
        if (is_array(current($choices)) || current($choices) instanceof Traversable)
            return $this->emitComplexChoices($choices, $values, $have_def, $def_key);

        foreach ($choices as $key => $name) {
            if (!$have_def && $key == $def_key)
                continue; ?>
            <option value="<?php echo $key; ?>" <?php
                if (isset($values[$key])) echo 'selected="selected"';
            ?>><?php echo Format::htmlchars($name); ?></option>
        <?php
        }
    }

    function emitComplexChoices($choices, $values=array(), $have_def=false, $def_key=null) {
        foreach ($choices as $label => $group) {
            if (!count($group)) continue;
            ?>
            <optgroup label="<?php echo $label; ?>"><?php
            foreach ($group as $key => $name) {
                if (!$have_def && $key == $def_key)
                    continue; ?>
            <option value="<?php echo $key; ?>" <?php
                if (isset($values[$key])) echo 'selected="selected"';
            ?>><?php echo Format::htmlchars($name); ?></option>
<?php       } ?>
            </optgroup><?php
        }
    }

    function getValue() {

        if (!($value = parent::getValue()))
            return null;

        if ($value && !is_array($value))
            $value = array($value);

        // Assume multiselect
        $values = array();
        $choices = $this->field->getChoices();

        if ($choices && is_array($value)) {
            // Complex choices
            if (is_array(current($choices))
                    || current($choices) instanceof Traversable) {
                foreach ($choices as $label => $group) {
                     foreach ($group as $k => $v)
                        if (in_array($k, $value))
                            $values[$k] = $v;
                }
            } else {
                foreach($value as $k => $v) {
                    if (isset($choices[$v]))
                        $values[$v] = $choices[$v];
                    elseif (($i=$this->field->lookupChoice($v)))
                        $values += $i;
                }
            }
        }

        return $values;
    }

    function getJsValueGetter() {
        return '%s.find(":selected").val()';
    }
}

/**
 * A widget for the ChoiceField which will render a list of radio boxes or
 * checkboxes depending on the value of $config['multiple']. Complex choices
 * are also supported and will be rendered as divs.
 */
class BoxChoicesWidget extends Widget {
    function render($options=array()) {
        $this->emitChoices($this->field->getChoices());
    }

    function emitChoices($choices) {
      static $uid = 1;

      if (!isset($this->value))
          $this->value = $this->field->get('default');
      $config = $this->field->getConfiguration();
      $type = $config['multiple'] ? 'checkbox' : 'radio';

      $classes = array('checkbox');
      if (isset($config['classes']))
          $classes = array_merge($classes, (array) $config['classes']);

      foreach ($choices as $k => $v) {
          if (is_array($v)) {
              $this->renderSectionBreak($k);
              $this->emitChoices($v);
              continue;
          }
          $id = sprintf("%s-%s", $this->id, $uid++);
?>
        <label class="<?php echo implode(' ', $classes); ?>"
            for="<?php echo $id; ?>">
        <input id="<?php echo $id; ?>" type="<?php echo $type; ?>"
            name="<?php echo $this->name; ?>[]" <?php
            if ($this->value[$k]) echo 'checked="checked"'; ?> value="<?php
            echo Format::htmlchars($k); ?>"/>
        <?php
        if ($v) {
            echo Format::viewableImages($v);
        } ?>
        </label>
<?php   }
    }

    function renderSectionBreak($label) { ?>
        <div><?php echo Format::htmlchars($label); ?></div>
<?php
    }

    function getValue() {
        $data = $this->field->getSource();
        if (count($data)) {
            if (!isset($data[$this->name]))
                return array();
            return $this->collectValues($data[$this->name], $this->field->getChoices());
        }
        return parent::getValue();
    }

    function collectValues($data, $choices) {
        $value = array();
        foreach ($choices as $k => $v) {
            if (is_array($v))
                $value = array_merge($value, $this->collectValues($data, $v));
            elseif (@in_array($k, $data))
                $value[$k] = $v;
        }
        return $value;
    }
}

/**
 * An extension to the BoxChoicesWidget which will render complex choices in
 * tabs.
 */
class TabbedBoxChoicesWidget extends BoxChoicesWidget {
    function render($options=array()) {
        $tabs = array();
        foreach ($this->field->getChoices() as $label=>$group) {
            if (is_array($group)) {
                $tabs[$label] = $group;
            }
            else {
                $this->emitChoices(array($label=>$group));
            }
        }
        if ($tabs) {
            ?>
            <div>
            <ul class="alt tabs">
<?php       $i = 0;
            foreach ($tabs as $label => $group) {
                $active = $i++ == 0; ?>
                <li <?php if ($active) echo 'class="active"';
                  ?>><a href="#<?php echo sprintf('%s-%s', $this->name, Format::slugify($label));
                  ?>"><?php echo Format::htmlchars($label); ?></a></li>
<?php       } ?>
            </ul>
<?php       $i = 0;
            foreach ($tabs as $label => $group) {
                $first = $i++ == 0; ?>
                <div class="tab_content <?php if (!$first) echo 'hidden'; ?>" id="<?php
                  echo sprintf('%s-%s', $this->name, Format::slugify($label));?>">
<?php           $this->emitChoices($group); ?>
                </div>
<?php       } ?>
            </div>
<?php   }
    }
}

/**
* TimezoneWidget extends ChoicesWidget to add auto-detect and select2 search
* options
*
**/
class TimezoneWidget extends ChoicesWidget {

    function render($options=array()) {
        parent::render($options);
        $config = $this->field->getConfiguration();
        if (@$config['autodetect']) {
        ?>
        <button type="button" class="action-button" onclick="javascript:
            $('head').append($('<script>').attr('src', '<?php
            echo ROOT_PATH; ?>js/jstz.min.js'));
            var recheck = setInterval(function() {
                if (window.jstz !== undefined) {
                    clearInterval(recheck);
                    var zone = jstz.determine();
                    $('#<?php echo $this->id; ?>').val(zone.name()).trigger('change');

                }
            }, 100);
            return false;"
            style="vertical-align:middle">
            <i class="icon-map-marker"></i> <?php echo __('Auto Detect'); ?>
        </button>
        <?php
        } ?>
        <script type="text/javascript">
            $(function() {
                $('#<?php echo $this->id; ?>').select2({
                    allowClear: true,
                    width: '300px'
                });
            });
        </script>
      <?php
    }
}

class CheckboxWidget extends Widget {
    function __construct($field) {
        parent::__construct($field);
        $this->name = '_field-checkboxes';
    }

    function render($options=array()) {
        $config = $this->field->getConfiguration();
        if (!isset($this->value))
            $this->value = $this->field->get('default');