button.php

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<?php

$vars['class'] = elgg_extract_class($vars, 'elgg-button');

if (!isset($vars['text']) && isset($vars['value'])) {
    // Keeping this to ease the transition to 3.0
    $vars['text'] = elgg_extract('value', $vars);
}

if (!empty($vars['confirm'])) {
    $vars['data-confirm'] = elgg_extract('confirm', $vars);
    
    // if (bool) true use defaults
    if ($vars['data-confirm'] === true) {
        $vars['data-confirm'] = elgg_echo('question:areyousure');
    }
}

$type = elgg_extract('type', $vars, 'button', false);
$vars['type'] = $type;

$text = (string) elgg_extract('text', $vars);
unset($vars['text']);

$text = elgg_format_element('span', [
    'class' => 'elgg-button-label',
], $text);

$icon = (string) elgg_extract('icon', $vars);
unset($vars['icon']);

if (!elgg_is_empty($icon) && !str_starts_with($icon, '<')) {
    $icon = elgg_view_icon($icon, [
        'class' => 'elgg-button-icon',
    ]);
}

$icon_alt = (string) elgg_extract('icon_alt', $vars);
unset($vars['icon_alt']);

if (!elgg_is_empty($icon_alt) && !str_starts_with($icon_alt, '<')) {
    $icon_alt = elgg_view_icon($icon_alt, [
        'class' => 'elgg-button-icon-alt',
    ]);
}

switch ($type) {
    case 'submit':
        $vars['class'][] = 'elgg-button-submit';
        break;

    case 'reset':
        $vars['class'][] = 'elgg-button-cancel';
        break;
}

echo elgg_format_element('button', $vars, $icon . $text . $icon_alt);