shimmie2/ext/browser_search/main.php

<?php declare(strict_types=1);

class BrowserSearch extends Extension
{
    public function onInitExt(InitExtEvent $event)
    {
        global $config;
        $config->set_default_string("search_suggestions_results_order", 'a');
    }

    public function onPageRequest(PageRequestEvent $event)
    {
        global $config, $database, $page;

        // Add in header code to let the browser know that the search plugin exists
        // We need to build the data for the header
        $search_title = $config->get_string(SetupConfig::TITLE);
        $search_file_url = make_link('browser_search.xml');
        $page->add_html_header("<link rel='search' type='application/opensearchdescription+xml' title='$search_title' href='$search_file_url'>");

        // The search.xml file that is generated on the fly
        if ($event->page_matches("browser_search.xml")) {
            // First, we need to build all the variables we'll need
            $search_title = $config->get_string(SetupConfig::TITLE);
            $search_form_url =  make_link('post/list/{searchTerms}');
            $suggenton_url = make_link('browser_search/')."{searchTerms}";
            $icon_b64 = base64_encode(file_get_contents("ext/static_files/static/favicon.ico"));

            // Now for the XML
            $xml = "
				<SearchPlugin xmlns='http://www.mozilla.org/2006/browser/search/' xmlns:os='http://a9.com/-/spec/opensearch/1.1/'>
				<os:ShortName>$search_title</os:ShortName>
				<os:InputEncoding>UTF-8</os:InputEncoding>
				<os:Image width='16' height='16'>data:image/x-icon;base64,$icon_b64</os:Image>
				<SearchForm>$search_form_url</SearchForm>
				<os:Url type='text/html' method='GET' template='$search_form_url'>
				  <os:Param name='search' value='{searchTerms}'/>
				</os:Url>
				<Url type='application/x-suggestions+json' template='$suggenton_url'/>
				</SearchPlugin>
			";

            // And now to send it to the browser
            $page->set_mode(PageMode::DATA);
            $page->set_mime(MimeType::XML);
            $page->set_data($xml);
        } elseif ($event->page_matches("browser_search")) {
            $suggestions = $config->get_string("search_suggestions_results_order");
            if ($suggestions == "n") {
                return;
            }

            // We have to build some json stuff
            $tag_search = $event->get_arg(0);

            // Now to get DB results
            if ($suggestions == "a") {
                $order = "tag ASC";
            } else {
                $order = "count DESC";
            }
            $tags = $database->get_col(
                "SELECT tag FROM tags WHERE tag LIKE :tag AND count > 0 ORDER BY $order LIMIT 30",
                ['tag'=>$tag_search."%"]
            );

            // And to do stuff with it. We want our output to look like:
            // ["shimmie",["shimmies","shimmy","shimmie","21 shimmies","hip shimmies","skea shimmies"],[],[]]
            $page->set_mode(PageMode::DATA);
            $page->set_data(json_encode([$tag_search, $tags, [], []]));
        }
    }

    public function onSetupBuilding(SetupBuildingEvent $event)
    {
        $sort_by = [];
        $sort_by['Alphabetical'] = 'a';
        $sort_by['Tag Count'] = 't';
        $sort_by['Disabled'] = 'n';

        $sb = new SetupBlock("Browser Search");
        $sb->add_choice_option("search_suggestions_results_order", $sort_by, "Sort the suggestions by:");
        $event->panel->add_block($sb);
    }
}