function Text3Widget::validate

Validate the fields and convert them into a single value as text.

File

modules/field_example/src/Plugin/Field/FieldWidget/Text3Widget.php, line 70

Class

Text3Widget

Plugin implementation of the 'field_example_3text' widget.

Namespace

Code

public function validate($element, FormStateInterface $form_state) {
    // Validate each of the textfield entries.
    $values = [];
    foreach ([
        'r',
        'g',
        'b',
    ] as $colorfield) {
        $values[$colorfield] = $element[$colorfield]['#value'];
        // If they left any empty, we'll set the value empty and quit.
        if (strlen($values[$colorfield]) == 0) {
            $form_state->setValueForElement($element, '');
            return;
        }
        // If they gave us anything that's not hex, reject it.
        if (strlen($values[$colorfield]) != 2 || !ctype_xdigit($values[$colorfield])) {
            $form_state->setError($element[$colorfield], $form_state, $this->t("Saturation value must be a 2-digit hexadecimal value between 00 and ff."));
        }
    }
    // Set the value of the entire form element.
    $value = strtolower(sprintf('#%02s%02s%02s', $values['r'], $values['g'], $values['b']));
    $form_state->setValueForElement($element, $value);
}