Added filter by Manufacturer in Product List

README.md

@@ -29,6 +29,7 @@ This is a modified version of Opencart 3.0.3.6.
 - Show/Hide password. Code used from <a href="https://github.com/opencartbrasil/opencartbrasil">Opencart Brasil</a>
 - Manufacturer Layout Override
 - {% include %} function support
+- Filter by Manufacturer in Product List
 
 ## Note
 This version is not supported by Opencart. You need to have at least PHP 7.3 to use this version.

upload/admin/controller/catalog/product.php

@@ -231,6 +231,12 @@ protected function getList() {
 			$filter_name = '';
 		}
 
+		if (isset($this->request->get['filter_manufacturer'])) {
+			$filter_manufacturer = $this->request->get['filter_manufacturer'];
+		} else {
+			$filter_manufacturer = '';
+		}
+
 		if (isset($this->request->get['filter_model'])) {
 			$filter_model = $this->request->get['filter_model'];
 		} else {
@@ -285,6 +291,10 @@ protected function getList() {
 			$url .= '&filter_name=' . urlencode(html_entity_decode($this->request->get['filter_name'], ENT_QUOTES, 'UTF-8'));
 		}
 
+		if (isset($this->request->get['filter_manufacturer'])) {
+			$url .= '&filter_manufacturer=' . $this->request->get['filter_manufacturer'];
+		}
+
 		if (isset($this->request->get['filter_model'])) {
 			$url .= '&filter_model=' . urlencode(html_entity_decode($this->request->get['filter_model'], ENT_QUOTES, 'UTF-8'));
 		}
@@ -333,6 +343,7 @@ protected function getList() {
 
 		$filter_data = array(
 			'filter_name'	  => $filter_name,
+			'filter_manufacturer'   => $filter_manufacturer,
 			'filter_model'	  => $filter_model,
 			'filter_price'	  => $filter_price,
 			'filter_quantity' => $filter_quantity,
@@ -350,6 +361,16 @@ protected function getList() {
 
 		$results = $this->model_catalog_product->getProducts($filter_data);
 
+		$this->load->model('catalog/manufacturer');
+
+		$data['manufacturers'][] = array(
+			'manufacturer_id' => '0',
+			'name' => $this->language->get('entry_no_manufacturers'),
+			'sort_order' => '0'
+		);
+
+		$data['manufacturers'] = array_merge($data['manufacturers'], $this->model_catalog_manufacturer->getManufacturers($filter_data));
+
 		foreach ($results as $result) {
 			if (is_file(DIR_IMAGE . html_entity_decode($result['image'], ENT_QUOTES, 'UTF-8'))) {
 				$image = $this->model_tool_image->resize(html_entity_decode($result['image'], ENT_QUOTES, 'UTF-8'), 40, 40);
@@ -493,6 +514,7 @@ protected function getList() {
 		$data['results'] = sprintf($this->language->get('text_pagination'), ($product_total) ? (($page - 1) * $this->config->get('config_limit_admin')) + 1 : 0, ((($page - 1) * $this->config->get('config_limit_admin')) > ($product_total - $this->config->get('config_limit_admin'))) ? $product_total : ((($page - 1) * $this->config->get('config_limit_admin')) + $this->config->get('config_limit_admin')), $product_total, ceil($product_total / $this->config->get('config_limit_admin')));
 
 		$data['filter_name'] = $filter_name;
+		$data['filter_manufacturer'] = $filter_manufacturer;
 		$data['filter_model'] = $filter_model;
 		$data['filter_price'] = $filter_price;
 		$data['filter_quantity'] = $filter_quantity;

upload/admin/language/en-gb/catalog/product.php

@@ -29,6 +29,7 @@
 
 // Entry
 $_['entry_name']             = 'Product Name';
+$_['entry_no_manufacturers'] = '- None -';
 $_['entry_description']      = 'Description';
 $_['entry_meta_title']       = 'Meta Tag Title';
 $_['entry_meta_keyword']     = 'Meta Tag Keywords';

upload/admin/model/catalog/product.php

@@ -362,6 +362,12 @@ public function getProducts($data = array()) {
 			$sql .= " AND pd.name LIKE '" . $this->db->escape($data['filter_name']) . "%'";
 		}
 
+        if (isset($data['filter_manufacturer'])) {
+            if (!empty($data['filter_manufacturer']) || $data['filter_manufacturer'] == '0') {
+                $sql .= " AND p.manufacturer_id = '" . (int)$data['filter_manufacturer'] . "'";
+            }
+        }
+
 		if (!empty($data['filter_model'])) {
 			$sql .= " AND p.model LIKE '" . $this->db->escape($data['filter_model']) . "%'";
 		}

upload/admin/view/template/catalog/product_list.twig

@@ -37,6 +37,19 @@
               <label class="control-label" for="input-name">{{ entry_name }}</label>
               <input type="text" name="filter_name" value="{{ filter_name }}" placeholder="{{ entry_name }}" id="input-name" class="form-control" />
             </div>
+            <div class="form-group">
+              <label class="control-label" for="input-manufacturer">{{ entry_manufacturer }}</label>
+              <select name="filter_manufacturer" id="input-manufacturer" class="form-control">
+                <option value=""></option>
+                 {% for manufacturer in manufacturers %}
+                  {% if manufacturer.manufacturer_id == filter_manufacturer %}
+                    <option value="{{ manufacturer.manufacturer_id }}" selected="selected">{{ manufacturer.name }}&nbsp;&nbsp;&nbsp;&nbsp;</option>
+                  {% else %}
+                    <option value="{{ manufacturer.manufacturer_id }}">&nbsp;&nbsp;{{ manufacturer.name }}&nbsp;&nbsp;&nbsp;&nbsp;</option>
+                  {% endif %}
+                 {% endfor %}
+              </select>
+            </div>
             <div class="form-group">
               <label class="control-label" for="input-model">{{ entry_model }}</label>
               <input type="text" name="filter_model" value="{{ filter_model }}" placeholder="{{ entry_model }}" id="input-model" class="form-control" />
@@ -160,6 +173,12 @@ $('#button-filter').on('click', function() {
 		url += '&filter_name=' + encodeURIComponent(filter_name);
 	}
 
+	var filter_manufacturer = $('select[name=\'filter_manufacturer\']').val();
+
+	if (filter_manufacturer != '*') {
+		url += '&filter_manufacturer=' + encodeURIComponent(filter_manufacturer);
+	}
+
 	var filter_model = $('input[name=\'filter_model\']').val();
 
 	if (filter_model) {