Method getFormXml

public static function getFormXml($billingSuffix = '', $shippingSuffix = '_phs', $billing = 1, $shipping = 1, $account = 0, $guest = 0)
{
    if (self::$form === false) {
        $app = Factory::getApplication();
        $o = array();
        $oFb = array();
        $oFs = array();
        $o[] = '<form>';
        $o[] = '<fieldset name="user" addrulepath="/components/com_phocacart/models/rules" addfieldpath="/components/com_phocacart/models/fields" label="COM_PHOCACART_FORM_LABEL">';
        $fields = new PhocacartFormItems();
        $f = $fields->getFormItems($billing, $shipping, $account);
        // Specific fields not managed in administration but added to form,
        // so we can work with it in checkout view html (default_address)
        $specFields = array('ba_sa', 'newsletter', 'id');
        $c = count($f);
        foreach ($specFields as $k => $v) {
            $f[$c] = new StdClass();
            $f[$c]->title = $v;
            $f[$c]->display_billing = 0;
            $f[$c]->display_shipping = 0;
            $f[$c]->display_account = 0;
            $f[$c]->type = 'hidden';
            $f[$c]->label = $v;
            $f[$c]->required = 0;
            $f[$c]->pattern = '';
            $f[$c]->maxlength = '';
            $c++;
        }
        if (!empty($f)) {
            foreach ($f as $k => $v) {
                $fB = $fS = array();
                // Billing and Shipping
                $class = '';
                if ($v->title != '' && $v->type != '' && $v->label != '') {
                    $fB[] = '<field name="' . htmlspecialchars($v->title) . $billingSuffix . '"';
                    $fS[] = '<field name="' . htmlspecialchars($v->title) . $shippingSuffix . '"';
                    $tA = explode(":", $v->type);
                    $type = 'text';
                    $typeSuffix = '';
                    if (isset($tA[0]) && $tA[0] != '') {
                        $type = $tA[0];
                    }
                    if (isset($tA[1]) && $tA[1] != '') {
                        $typeSuffix = $tA[1];
                    }
                    $typeLimit = '';
                    if ($typeSuffix != '') {
                        $typeLimit = (int) PhocacartUtils::getNumberFromText($typeSuffix);
                    }
                    if (isset($v->validate) && $v->validate == 'email') {
                        $type = 'email';
                    }
                    // --- PREDEFINED VALUES (limited feature, see documentation)
                    $predefinedValues = '';
                    if (isset($v->predefined_values) && $v->predefined_values != '') {
                        $predefinedValues = array_map('trim', explode(',', $v->predefined_values));
                        $predefinedValues = array_filter($predefinedValues, 'strlen');
                    }
                    if (!empty($predefinedValues)) {
                        //$type= "list";
                        //$type= "radio";
                        //$type = 'checkbox';
                        if ($type != 'list' && $type != 'radio' && $type != 'checkbox') {
                            $type = 'checkbox';
                        }
                    }
                    $fB[] = $fS[] = ' type="' . htmlspecialchars($type) . '"' . ' label="' . htmlspecialchars($v->label) . '"';
                    if (isset($v->description) && $v->description != '') {
                        $fB[] = $fS[] = ' description="' . htmlspecialchars($v->description) . '"';
                    }
                    if (isset($v->class) && $v->class != '') {
                        $class .= ' ' . htmlspecialchars($v->class);
                    }
                    if (isset($v->default) && $v->default != '') {
                        $fB[] = $fS[] = ' default="' . htmlspecialchars($v->default) . '"';
                    }
                    if ($type == 'checkbox' && isset($v->default) && $v->default == '1') {
                        $fB[] = $fS[] = ' checked="checked"';
                    }
                    // 0 not read only
                    // 1 read only
                    // 2 read only for registered users but not read only for guests
                    if (isset($v->read_only)) {
                        //if ($app->isClient('administrator')) {
                        // in admin allow to change the readonly input forms
                        //} else {
                        if ($v->read_only == 1) {
                            // Read only everwhere
                            $fB[] = $fS[] = ' readonly="true"';
                            $class .= ' readonly';
                        } else {
                            if ($v->read_only == 3) {
                                // Read only everwhere except administration
                                if ($app->isClient('administrator')) {
                                } else {
                                    $fB[] = $fS[] = ' readonly="true"';
                                    $class .= ' readonly';
                                }
                            } else {
                                if ($v->read_only == 2 && $guest == 0) {
                                    // Read only for NO guests only
                                    $fB[] = $fS[] = ' readonly="true"';
                                    $class .= ' readonly';
                                } else {
                                    if ($v->read_only == 4 && $guest == 0) {
                                        // Read only for NO guests only everwhere except administration
                                        if ($app->isClient('administrator')) {
                                        } else {
                                            $fB[] = $fS[] = ' readonly="true"';
                                            $class .= ' readonly';
                                        }
                                    }
                                }
                            }
                        }
                        //}
                    }
                    // No required in admin
                    if (!$app->isClient('administrator')) {
                        if (isset($v->required) && $v->required == 1) {
                            $fB[] = $fS[] = ' required="true"';
                        }
                    }
                    // Pattern
                    if (isset($v->pattern) && $v->pattern != '') {
                        $fB[] = $fS[] = ' pattern="' . $v->pattern . '"';
                    }
                    if (isset($v->maxlength) && (int) $v->maxlength > 0) {
                        $fB[] = $fS[] = ' maxlength="' . (int) $v->maxlength . '"';
                    } else {
                        // e.g. we limit varchar(100)
                        if ($type == 'text' && $typeLimit > 0) {
                            $fB[] = $fS[] = ' maxlength="' . $typeLimit . '"';
                        }
                    }
                    if (isset($v->unique) && $v->unique == 1) {
                        $fB[] = $fS[] = ' unique="true"';
                    }
                    if (isset($v->validate) && $v->validate != '') {
                        $fB[] = $fS[] = ' validate="' . htmlspecialchars($v->validate) . '"';
                        $class .= ' validate-' . htmlspecialchars($v->validate);
                    }
                    $fB[] = ' class="' . htmlspecialchars($class) . '"';
                    // Billing and Shipping is the same - javascript function
                    $class .= ' phShippingFormFields';
                    if (isset($v->required) && $v->required == 1) {
                        $class .= ' phShippingFormFieldsRequired';
                    }
                    $fS[] = ' class="' . htmlspecialchars($class) . '"';
                    // --- PREDEFINED VALUES (limited feature, see documentation)
                    // Selectbox is displayed instead of standard types when predefined values are defined
                    if (!empty($predefinedValues)) {
                        $fB[] = $fS[] = ' >';
                        if (isset($v->predefined_values_first_option) && $v->predefined_values_first_option != '') {
                            $fB[] = $fS[] = '<option value="">' . Text::_(htmlspecialchars($v->predefined_values_first_option)) . '</option>';
                        }
                        foreach ($predefinedValues as $k => $v) {
                            $defaultSelected = '';
                            if (isset($v->default) && $v->default != '') {
                                $defaultSelected = 'selected="selected"';
                            }
                            $fB[] = $fS[] = '<option value="' . htmlspecialchars($v) . '" ' . $defaultSelected . '>' . htmlspecialchars($v) . '</option>';
                        }
                        $fB[] = $fS[] = '</field>';
                    } else {
                        $fB[] = $fS[] = ' />';
                    }
                    $o[] = implode("", $fB) . implode("", $fS);
                } else {
                    continue;
                }
            }
        }
        $o[] = '</fieldset>';
        $o[] = '</form>';
        $fields = array();
        $fields['xml'] = implode("", $o);
        $fields['array'] = $f;
        self::$form = $fields;
    }
    return self::$form;
}