function TelephoneLinkFormatter::viewElements

Overrides FormatterInterface::viewElements

File

core/modules/telephone/src/Plugin/Field/FieldFormatter/TelephoneLinkFormatter.php, line 65

Class

TelephoneLinkFormatter

Plugin implementation of the 'telephone_link' formatter.

Namespace

Code

public function viewElements(FieldItemListInterface $items, $langcode) {
    $element = [];
    $title_setting = $this->getSetting('title');
    foreach ($items as $delta => $item) {
        // If the telephone number is 5 or less digits, parse_url() will think
        // it's a port number rather than a phone number which causes the link
        // formatter to throw an InvalidArgumentException. Avoid this by inserting
        // a dash (-) after the first digit - RFC 3966 defines the dash as a
        // visual separator character and so will be removed before the phone
        // number is used. See https://bugs.php.net/bug.php?id=70588 for more.
        // While the bug states this only applies to numbers <= 65535, a 5 digit
        // number greater than 65535 will cause parse_url() to return FALSE so
        // we need the work around on any 5 digit (or less) number.
        // First we strip whitespace so we're counting actual digits.
        $phone_number = preg_replace('/\\s+/', '', $item->value);
        if (strlen($phone_number) <= 5) {
            $phone_number = substr_replace($phone_number, '-', 1, 0);
        }
        // Render each element as link.
        $element[$delta] = [
            '#type' => 'link',
            // Use custom title if available, otherwise use the telephone number
            // itself as title.
'#title' => $title_setting ?: $item->value,
            // Prepend 'tel:' to the telephone number.
'#url' => Url::fromUri('tel:' . rawurlencode($phone_number)),
            '#options' => [
                'external' => TRUE,
            ],
        ];
        if (!empty($item->_attributes)) {
            $element[$delta]['#options'] += [
                'attributes' => [],
            ];
            $element[$delta]['#options']['attributes'] += $item->_attributes;
            // Unset field item attributes since they have been included in the
            // formatter output and should not be rendered in the field template.
            unset($item->_attributes);
        }
    }
    return $element;
}