Files and images

There are 3 types of data for storing files in MV:

• file - single file
• image - single image
• multi_images - array of images with comments

The database stores paths to files from the project root without the leading slash. Files of the file type are stored in folders userfiles/models/model_name-files/. All images of models are located in folders of the form userfiles/models/model_name-images/. When uploading to the server, in case of duplicate names, each file is assigned a unique number.

Reduced copies of images are created in subfolders, with the subfolder name set automatically based on the dimensions and name of the current model, for example userfiles/models/gallery-images/gallery_70x70/name-of-image.jpg.

Display files for downloading and images

• displayFileLink($field [, $link_text, $no_file_text]) - returns a link to a file for downloading

  $link_text - the name of the file to insert into the link (if absent, the name of the file itself will be supplied)
  $no_file_text - if the file is absent and this parameter is specified, this text will be displayed

• displayImage($field,  [, $extra_params]) - returns the img tag with this image

Resizing and cropping images

• cropImage($image, $width, $height [, $extra_params]) - reducing the image to the specified dimensions with cropping
• resizeImage($image, $width, $height [, $extra_params]) - proportionally reducing the image without cropping

The cropImage() and resizeImage() methods can be called from a model object or from a Record class object, and they create a folder for reduced copies based on the file's belonging to a specific model.

Additional parameters can be passed as an associated array $extra_params. Possible parameter options (keys): 'alt-text', 'no-image-text', 'title', 'css-class'. None of the parameters are required. When passing a parameter, it will be added to the img tag.

Working with an array of images

• extractImages($field) or asArrays($field) - converting to an array of images
• getFirstImage($field) - extracting the first image from the array

Let's create a model and extract the necessary data in the templates.

class Products extends Model 
{
    protected $name = 'Products';
    
    protected $model_elements = [
        ['Name', 'char', 'name', ['required' => true]],
        ['Main image', 'image', 'main_image'],
        ['Additional images', 'multi_images', 'extra_images'],
        ['Manual', 'file', 'manual'],
        ['Description', 'text', 'text_description']
    ];
}

We display a list of all products with images for the general template, file models/products.model.php.

<?
public function display()
{
    $rows = $this -> select();
    $html = '';

    foreach($rows as $row)
    {
        $url = $this -> root_path.'product/'.$row['id'];

        $html .= '<div>';
        $html .= '<div class="name"><a href="'.$url.'">'.$row["name"].'</a></div>';
        $html .= '<div class="image">';
        $html .= $this -> cropImage($row["main_image"], 150, 150, ['alt-text' => $row['name']]).'</div>';
        $html .= '<div class="description">';
        $html .= Service::cutText($row["text_description"], 200, "...").'</div>';
        $html .= '</div>';
    }

    return $html;
}

We display a list of product instructions that have them, file models/products.model.php.

<?
public function displayManuals()
{
    $rows = $this -> select(['manual!=' => '']);
    $html = '';
 
    foreach($rows as $row)
    {
        $html .= '<div class="dowload-file">';
        $html .= '<a href="'.Service::addFileRoot($row['manual']).'">'.$row['name'].'</a>';
        $html .= '</div>';
    }
 
    return $html;
}

On the product page, we display all available data, file views/view-product.php.

<?
$product = $mv -> products -> defineProductPage($mv -> router);
$mv -> display404($product);
 
include $mv -> views_path.'main-header.php';
?>
<div id="content">
    <h1><? echo $product -> name; ?></h1>
    <div id="main-picture">
        <a class="lightbox" href="<? echo $mv -> root_path.$product -> main_image; ?>">
            <? echo $mv -> products -> resizeImage($product -> main_image, 300, 250); ?>
        </a>
    </div>
    <div id="extra-pictures">
        <?
            foreach($product -> extractImages('extra_images') as $image)
            {
               echo '<a class="lightbox" href="'.$mv -> root_path.$image['image'].'">';
               echo $mv -> products -> cropImage($image, 100, 100).'</a>';
            } 
        ?>
    </div>
    <p><? echo $product -> text_description; ?></p>
    <p><? echo $product -> displayFileLink('manual', 'Download instructions');  ?></p>
</div>
<?
include $mv -> views_path.'main-footer.php';
?>

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