crop.php

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<?php
if (elgg_extract('cropper_enabled', $vars, true) === false) {
    return;
}

elgg_require_css('cropperjs/cropper');

$entity = elgg_extract('entity', $vars);
$icon_type = elgg_extract('icon_type', $vars, 'icon');
$input_name = elgg_extract('name', $vars, 'icon');

// build cropper configuration
$default_config = [
    'viewMode' => 2,
    'background' => false,
    'autoCropArea' => 1,
];

$cropper_data = array_merge($default_config, (array) elgg_extract('cropper_config', $vars, []));

// determine current cropping coordinates
$entity_coords = [];
if ($entity instanceof \ElggEntity) {
    $entity_coords = $entity->getIconCoordinates($icon_type);
    
    // still enough for cropping
    if (isset($entity_coords['x1'], $entity_coords['x2'], $entity_coords['y1'], $entity_coords['y2'])) {
        $cropper_data['data'] = [
            'x' => $entity_coords['x1'],
            'y' => $entity_coords['y1'],
            'width' => $entity_coords['x2'] - $entity_coords['x1'],
            'height' => $entity_coords['y2'] - $entity_coords['y1'],
        ];
        
        if (!empty($cropper_data['data']['width']) && $cropper_data['data']['height']) {
            $cropper_data['existingAspectRatio'] = $cropper_data['data']['width'] / $cropper_data['data']['height'];
        }
    }
}

// detect cropping aspect ratio
if (!isset($cropper_data['aspectRatio'])) {
    $detect_aspect_ratio = function($vars) use (&$cropper_data) {
        $cropper_aspect_ratio_size = elgg_extract('cropper_aspect_ratio_size', $vars, 'master');
        if ($cropper_aspect_ratio_size === false) {
            return;
        }
        
        $icon_type = elgg_extract('icon_type', $vars, 'icon');
        $entity_type = elgg_extract('entity_type', $vars);
        $entity_subtype = elgg_extract('entity_subtype', $vars);
        
        $sizes = elgg_get_icon_sizes($entity_type, $entity_subtype, $icon_type);
        if (empty($sizes)) {
            // no way to read the config
            return;
        }
        
        if (!isset($sizes[$cropper_aspect_ratio_size]) && $cropper_aspect_ratio_size !== 'master') {
            // fallback to master if custom ratio is missing
            $cropper_aspect_ratio_size = 'master';
        }
        
        if (!isset($sizes[$cropper_aspect_ratio_size])) {
            // return if ratio is not present
            return;
        }
        
        $width = (int) elgg_extract('w', $sizes[$cropper_aspect_ratio_size]);
        $height = (int) elgg_extract('h', $sizes[$cropper_aspect_ratio_size]);
        
        if (empty($width) || empty($height)) {
            return;
        }
        
        $cropper_data['aspectRatio'] = $width / $height;
        $cropper_data['initialAspectRatio'] = $cropper_data['aspectRatio'];
    };
    $detect_aspect_ratio($vars);
}

$img_url = null;
if ($entity instanceof \ElggEntity && $entity->hasIcon('master', $icon_type)) {
    $img_url = $entity->getIconURL([
        'size' => 'master',
        'type' => $icon_type,
    ]);
}

if (isset($cropper_data['existingAspectRatio'], $cropper_data['aspectRatio'])) {
    // prevents math rounding issues with non square aspect ratios when showing existing cropped area
    $cropper_data['aspectRatio'] = $cropper_data['existingAspectRatio'];
    unset($cropper_data['existingAspectRatio']);
}

$img = elgg_format_element('img', [
    'data-icon-cropper' => json_encode($cropper_data),
    'src' => $img_url,
    'alt' => elgg_echo('entity:edit:icon:crop:img:alt'),
]);

echo elgg_format_element('div', ['class' => ['elgg-entity-edit-icon-crop-wrapper', 'hidden', 'mbm']], $img);

$input = '';
foreach (['x1', 'y1', 'x2', 'y2'] as $coord) {
    $input .= elgg_view_field([
        '#type' => 'hidden',
        'name' => "{$input_name}_{$coord}",
        'value' => elgg_extract($coord, $entity_coords),
    ]);
}

if (!empty($img_url)) {
    $input .= elgg_view_field([
        '#type' => 'hidden',
        'name' => "_entity_edit_icon_crop[{$input_name}][guid]",
        'value' => $entity->guid,
    ]);
    $input .= elgg_view_field([
        '#type' => 'hidden',
        'name' => "_entity_edit_icon_crop[{$input_name}][type]",
        'value' => $icon_type,
    ]);
}

echo elgg_format_element('div', ['class' => ['elgg-entity-edit-icon-crop-input', 'hidden']], $input);

echo elgg_view('entity/edit/icon/crop_messages', $vars);

?>
<script>
    import('entity/edit/icon/crop').then((Cropper) => {
        var cropper = new Cropper.default();
        cropper.init('input[type="file"][name="<?php echo elgg_extract('name', $vars, 'icon'); ?>"]');
    });
</script>