add_panel.php

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<?php
elgg_ajax_gatekeeper();
 
// restoring context stack
$context_stack = get_input('context_stack');
if (!empty($context_stack) && is_array($context_stack)) {
    elgg_set_context_stack($context_stack);
}
 
elgg_import_esm('resources/widgets/add_panel');
 
$context = (string) elgg_extract('context', $vars, get_input('context'));
$owner_guid = (int) elgg_extract('owner_guid', $vars, (int) get_input('owner_guid'));
$new_widget_column = elgg_extract('new_widget_column', $vars, get_input('new_widget_column'));
$new_widget_position = elgg_extract('new_widget_position', $vars, get_input('new_widget_position'));
 
elgg_entity_gatekeeper($owner_guid);
 
$owner = get_entity($owner_guid);
 
elgg_set_page_owner_guid($owner->guid);
 
$widgets = elgg_get_widgets($owner->guid, $context);
$widget_types = elgg_get_widget_types([
    'context' => $context,
    'container' => $owner,
]);
uasort($widget_types, function ($a, $b) {
    return strcmp($a->name, $b->name);
});
 
$current_handlers = [];
foreach ($widgets as $column_widgets) {
    foreach ($column_widgets as $widget) {
        $current_handlers[] = $widget->handler;
    }
}
 
$result = elgg_format_element('p', [
    'class' => 'elgg-text-help',
], elgg_echo('widgets:add:description'));
 
$list_items = '';
foreach ($widget_types as $handler => $widget_type) {
    $class = [];
    // check if widget added and only one instance allowed
    if (!$widget_type->multiple && in_array($handler, $current_handlers)) {
        $class[] = 'elgg-state-unavailable';
    } else {
        $class[] = 'elgg-state-available';
    }
    
    $class[] = $widget_type->multiple ? 'elgg-widget-multiple' : 'elgg-widget-single';
    
    $action = '<div class="elgg-widgets-add-actions">';
    if (!$widget_type->multiple) {
        $action .= elgg_format_element('span', ['class' => 'elgg-quiet'], elgg_echo('widget:unavailable'));
    }
    
    $action .= elgg_view('output/url', [
        'class' => ['elgg-button', 'elgg-button-submit', 'elgg-size-small'],
        'text' => elgg_echo('add'),
        'href' => elgg_generate_action_url('widgets/add', [
            'handler' => $handler,
            'page_owner_guid' => $owner_guid,
            'context' => $context,
            'show_access' => elgg_extract('show_access', $vars, get_input('show_access')),
            'default_widgets' => elgg_in_context('default_widgets'),
            'new_widget_column' => $new_widget_column,
            'new_widget_position' => $new_widget_position,
        ]),
    ]);
    $action .= '</div>';
    
    $description = elgg_format_element('div', ['class' => 'elgg-loud'], $widget_type->name);
    
    if ($widget_type->description) {
        $description .= elgg_format_element('div', ['class' => 'elgg-quiet'], $widget_type->description);
    }
 
    $description = elgg_format_element('div', [
        'class' => 'elgg-widgets-add-description',
    ], $description);
 
    $item_content = $description . $action;
 
    $list_items .= elgg_format_element('li', [
        'class' => $class,
        'data-elgg-widget-type' => $handler,
    ], $item_content);
}
 
$result .= elgg_format_element('ul', [], $list_items);
 
$search_box = elgg_view('input/text', [
    'name' => 'widget_search',
    'title' => elgg_echo('search'),
    'placeholder' => elgg_echo('search'),
]);
 
echo elgg_view_module('info', elgg_echo('widgets:add'), $result, [
    'class' => 'elgg-widgets-add-panel',
    'menu' => $search_box,
]);