How to add new module to opencart administration?

Question

I want to add a sub menu item \"Locations\" to \"Catalog\" menu item in opencart administration. On selecting locations, I want to see my own location management view page which

Answer 1

I have already implemented your concept in my opencart project.

Notes:

1) by default in product adding dashboard page have a field to enter product location you fill product location there and follow my points

2) open catalog > model > category.php add this code

function getCategoryLoction($category_id) {
    $sql = "select p.location,count(p.location) as locCount from " . DB_PREFIX . "product p inner join " . DB_PREFIX . "product_to_category p2c on(p.product_id=p2c.product_id) where p2c.category_id=$category_id group by p.location";
    $query = $this->db->query($sql);
    return $query->rows;
}

3) open catalog > controller>module > category.php add this code

/* location based search starts here */
$incomingCatId  = ($this->data['category_id']!= '')?$this->data['category_id']:'0';
$locations  =   $this->model_catalog_category->getCategoryLoction($incomingCatId); 

foreach($locations as $loc):
    $this->data['locations'][] = array(
        'location' => $loc['location'],
        'count' =>  $loc['locCount'],
        'href' => $this->url->link('product/category', 'path=' . $incomingCatId.'&loc='.$loc['location'].'')
);
endforeach;    
/* location based search ends here */

4) open catalog > view >theme >default >template>module > category.tpl category add this code

<div class="l_nav_box">
    <div class="l_nav_title">
        <h6>Location</h6>
    </div>
    <ul class="cat_ul">
         <?php if(!empty($locations)): ?>
         <?php foreach ($locations as $loc) : ?>
         <?php if($loc['location']!= ''): ?>
         <li> <a href="<?php echo $loc['href']; ?>"><?php echo $loc['location']; ?> <span>(<?php echo $loc['count']; ?>)</span> </a> </li>

         <?php endif; ?>
         <?php endforeach; ?>
         <?php else: ?>
         No Locations mentioned
         <?php endif; ?>    
    </ul>       
</div>

5) important in admin side activate category module and save it choose

Answer 2

How to create a opencart admin module??

You can simply do this by adjusting:

Admin > controller > view > template > common > header.tpl

You can simply make adjustments to the menu on this page (static changes). To actually create modules for you and your staff etc. Then follow the tutorial of MVC posted on this page:

How to create a custom Admin Page in Opencart?