User:Scaledish/Scripts/404.js

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Documentation for this user script can be added at User:Scaledish/Scripts/404.

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mw.loader.using(['mediawiki.util'], function () {
    // Add button to the "More" tab
    mw.util.addPortletLink(
        'p-cactions',                             // Portlet ID for "More" tab
        '#',                                      // Href (dummy)
        'Check for 404s',                        // Link text
        'ca-check-404',                     // Link ID
        'Check all citations for 404s' // Tooltip
    );

    // Click handler for the button
    $('#ca-check-404').on('click', function (e) {
        e.preventDefault();

        $('.mw-parser-output a.external').each(function (_, link) {
            const href = link.href;
            
            // Skip web.archive.org links
	        if (href.includes('web.archive.org')) return;
	
	        // Special handling for facebook.com
	        if (href.includes('facebook.com')) {
	            $(link).css({
	                'outline': '1px dashed gray',
	            }).attr('title', 'Facebook must be checked manually.');
	            return;
	        }

            const citationURL = '/api/rest_v1/data/citation/mediawiki/' + encodeURIComponent(href);

            $.ajax({
                url: citationURL,
                method: 'GET',
                success: function () {
                    // Valid citation, do nothing
                },
                error: function (xhr) {
                    if (xhr.status === 404) {
                        $(link).css({
                            'outline': '1px dashed red',
                        }).attr('title', 'Unresolvable citation: not recognized by MediaWiki citation API');
                    }
                }
            });
        });
    });
});