Question

Is is possible in vQmod to checks if a method exists in a class. Only if it doesn’t exist will it make the change.

E.g at the moment I have a simple vqmod which is causing problems with another extension that is also making the same change and causing the duplicate method error.

<file name="catalog/model/tool/image.php">
    <operation>
        <search position="after"><![CDATA[
            class ModelToolImage extends Model {
        ]]></search>
        <add><![CDATA[
            public function get($filename) {
                if (!file_exists(DIR_IMAGE . $filename) || !is_file(DIR_IMAGE . $filename)) {
                    return;
                } 

                if (isset($this->request->server['HTTPS']) && (($this->request->server['HTTPS'] == 'on') || ($this->request->server['HTTPS'] == '1'))) {
                    return HTTPS_IMAGE . $filename;
                } else {
                    return HTTP_IMAGE . $filename;
                }   
            }
        ]]></add>
    </operation>
</file>

Also is there any way to give priority to one vqmod over another. I need 2 vqmod files to already the code of the vqmod before?

Answer 1

It’s not possible to add only if the method doesn’t exist no. The trick is to “hijack” the original, or rename it. As for priority, they get parsed a to z so if you want it applied first, name it something that comes before the other alphabetically, or just prepend aaa to the name