Suggestions - Code improvement for next/prev collection links

Hi guys,

Just looking to see if anyone has any insight into some improvements for something I've adapted from Shane Lenzen, here in the Perch community. Due to the way I am building my page I needed to get the values directly into a Perch system variable for use in the template rather than a function in the page. What I have is 100% working but I an keen to make it as efficient as possible and learn in the process. It may be that this is actually fine, and there isn't a better way but as you will see - I start by calling $result to store my collection (this is needed so that I can use the $result to find the next and previous items in the collection), but I have to end the whole thing calling $result again in order to get the collection to inherit the system variables that get set. Is there a better way of ordering things so I don't need to call $result twice?

//team output
    if (perch_get('s')){
        //detail view

        // get current item
        $result = perch_collection('Our Team',[
            'filter'=>'slug',
            'match'=>'eq',
            'value'=>perch_get('s'),
            'skip-template'=>true,
            'return-html'=>true
        ]);

        // get previous item
        $prev = perch_collection('Our Team', array(
            'template' => 'coaches_prev.html',
            'filter' => '_order',
            'match' => 'lt',
            'value' => $result[0]['_sortvalue'],
            'sort' => '_order',
            'sort-order' => 'DESC',
            'count' => 1,
            'skip-template' => true,
            'return-html' => true
        ));
        // if there is no previous item, loop to last item
        if (empty(array_filter($prev))) {
            $prev = perch_collection('Our Team', array(
                'template' => 'coaches_prev.html',
                'sort' => '_order',
                'sort-order' => 'DESC',
                'count' => 1,
                'skip-template' => true,
                'return-html' => true
            ));
            //update var
            PerchSystem::set_var('prev_coach', $prev['html']);
        } 
        // previous item link
        else {
            //set var
            PerchSystem::set_var('prev_coach', $prev['html']);
        }

        // get next item
        $next = perch_collection('Our Team', array(
            'template' => 'coaches_next.html',
            'filter' => '_order',
            'match' => 'gt',
            'value' => $result[0]['_sortvalue'],
            'sort' => '_order',
            'sort-order' => 'ASC',
            'count' => 1,
            'skip-template' => true,
            'return-html' => true
        ));
        // if no next item, loop to first item
        if (empty(array_filter($next))) {
            $next = perch_collection('Our Team', array(
            'template' => 'coaches_next.html',
            'sort' => '_order',
            'sort-order' => 'ASC',
            'count' => 1,
            'skip-template' => true,
            'return-html' => true
            ));
            //update var
            PerchSystem::set_var('next_coach', $next['html']);
        } 
        // next item link
        else {
            //set var
            PerchSystem::set_var('next_coach', $next['html']);
        }

        $result = perch_collection('Our Team',[
            'filter'=>'slug',
            'match'=>'eq',
            'value'=>perch_get('s'),
            'skip-template'=>true,
            'return-html'=>true
        ]);

        // output item in detail view
        echo $result['html'];

    } else{
        //list view
        perch_collection('Our Team', [
            'template' => 'coaches_listing.html',
            'sort'     => 'coach_name',
        ]);
    }