Detect .html resources and update "Download" to "View Page"

Update "Download" button to "View Page / Visit Site / ect" for external resources that lead to valid URLs.

For example, an external resource is entered into WPFD with the following:

Title: Zapier API Documentation
Type: External Resources
URL: https://zapier.com/learn/apis/

When displayed on the site, the button says "Download". When clicked, the user is expecting to download something... not be taken to another website.

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Something along the lines of this would be added to the tpl.php :

<?php if ((int) WpfdBase::loadValue($this->params, 'showdownload', 1) === 1) : ?>

    <?php

    $bg_download = WpfdBase::loadValue($this->params, 'bgdownloadlink', '');

    $color_download = WpfdBase::loadValue(

        $this->params,

        'colordownloadlink',

        ''

    );

    $download_style = '';

    if ($bg_download !== '') {

        $download_style .= 'background-color:' . $bg_download . ';';

    }

    if ($color_download !== '') {

        $download_style .= 'color:' . $color_download . ';';

    }

    ?>

    <!-- DETECT FORMAT -->

    $format = '';

    if ($format == 'html') {

        $format .= 'Open Page';';

    } else {

    	$format .= 'Download';';

	}

    <a class="downloadlink wpfd_downloadlink"

       href="/<?php echo esc_url($file->linkdownload) ?>" style="<?php echo esc_html($download_style); ?>">

       	<!-- BUTTON TEXT DEPENDENT ON FORMAT -->

        <?php esc_html_e('$format', 'wpfd'); ?>

        <i class="zmdi zmdi-cloud-download wpfd-download"></i>

    </a>

<?php endif; ?>