Detect plugin/theme installation (via upload)

Question

I am currently trying to detect when an administrator uploads (and installs) a theme or plugin.

The code I wrote is very fragile because it depends on the chance that the plugin/theme's name is the same as the uploaded zip file (which is rarely the case).

function EventFileUploaded($attachmentID){
    if(isset($_REQUEST['action'])){
        $file = get_attached_file($attachmentID);
        switch($_REQUEST['action']){
            case 'upload-theme':
                HandleThemeUpload($file);
                break;
            case 'upload-plugin':
                HandlePluginUpload($file);
                break;
        }
    }
}
add_action('delete_attachment', 'EventFileUploaded');

function HandleThemeUpload($fileName){
    $themes = wp_get_themes();
    // TODO somehow find which theme in $themes was installed from $fileName
}

function HandlePluginUpload($fileName){
    $plugins = get_plugins();
    // TODO somehow find which plugin in $plugins was installed from $fileName
}

I basically need to fill up the two TODOs marked above. This is a sample of the code I was using:

$fileName = explode('.', basename($fileName));
foreach(get_plugins() as $pluginFile => $plugin){
    if(strtolower(str_replace(' ', '-', $plugin['Name'])) == $fileName){
        $newPlugin = $plugin;
        break;
    }
}
// use $newPlugin if set

Of course the code above fails in some situations.

PS: I wasn't sure what tags to use, feel free to suggest better ones.

Answer 1

I think your best bet here is to hook into the flow at the time of uploading and processing the uploaded file.

There is a filter (line 327, file.php):

apply_filters( 'wp_handle_upload', array( 'file' => $new_file, 'url' => $url, 'type' => $type ), 'upload' );

You could create a filter within which you do nothing else but create a global variables to hold the current values for:

wp_get_themes();
wp_get_plugins();

then, within your existing functions

HandleThemeUpload() { }
HandlePluginUpload() { }

you get the themes and plugins again and then compare these results with your previous global results using array_diff(): e.g.

$NewPlugin = array_diff( $LatestPlugins, $OldGlobalPlugins );

Then you have the new plugins / themes.

Hope that helps.