<?php

public function getCustomers($data = array()) {
		$sql = "SELECT *, CONCAT(c.firstname, ' ', c.lastname) AS name, cgd.name AS customer_group FROM " . DB_PREFIX . "customer c LEFT JOIN " . DB_PREFIX . "customer_group_description cgd ON (c.customer_group_id = cgd.customer_group_id)";

		if (!empty($data['filter_affiliate'])) {
			$sql .= " LEFT JOIN " . DB_PREFIX . "customer_affiliate ca ON (ca.customer_id = c.customer_id)";
		}
		$sql .= " WHERE cgd.language_id = '" . (int)$this->config->get('config_language_id') . "' AND c.custom_field = '" . (int)$this->user->getVendedor()."'"; 
		
		if (!empty($data['filter_name'])) {
			$sql .= " AND CONCAT(c.firstname, ' ', c.lastname) LIKE '%" . $this->db->escape((string)$data['filter_name']) . "%'";
		}

		if (!empty($data['filter_email'])) {
			$sql .= " AND c.email LIKE '" . $this->db->escape((string)$data['filter_email']) . "%'";
		}

		if (isset($data['filter_newsletter']) && !is_null($data['filter_newsletter'])) {
			$sql .= " AND c.newsletter = '" . (int)$data['filter_newsletter'] . "'";
		}

		if (!empty($data['filter_customer_group_id'])) {
			$sql .= " AND c.customer_group_id = '" . (int)$data['filter_customer_group_id'] . "'";
		}

		if (!empty($data['filter_affiliate'])) {
			$sql .= " AND (SELECT customer_id FROM " . DB_PREFIX . "customer_affiliate ca WHERE ca.customer_id = c.customer_id)";
		}

		if (!empty($data['filter_ip'])) {
			$sql .= " AND c.customer_id IN (SELECT customer_id FROM " . DB_PREFIX . "customer_ip WHERE ip = '" . $this->db->escape((string)$data['filter_ip']) . "')";
		}

		if (isset($data['filter_status']) && $data['filter_status'] !== '') {
			$sql .= " AND c.status = '" . (int)$data['filter_status'] . "'";
		}

		if (!empty($data['filter_date_added'])) {
			$sql .= " AND DATE(c.date_added) = DATE('" . $this->db->escape((string)$data['filter_date_added']) . "')";
		}

		$sort_data = array(
			'name',
			'c.email',
			'customer_group',
			'c.status',
			'c.ip',
			'c.date_added'
		);

		if (isset($data['sort']) && in_array($data['sort'], $sort_data)) {
			$sql .= " ORDER BY " . $data['sort'];
		} else {
			$sql .= " ORDER BY name";
		}

		if (isset($data['order']) && ($data['order'] == 'DESC')) {
			$sql .= " DESC";
		} else {
			$sql .= " ASC";
		}

		if (isset($data['start']) || isset($data['limit'])) {
			if ($data['start'] < 0) {
				$data['start'] = 0;
			}

			if ($data['limit'] < 1) {
				$data['limit'] = 20;
			}

			$sql .= " LIMIT " . (int)$data['start'] . "," . (int)$data['limit'];
		}

		$query = $this->db->query($sql);

		return $query->rows;
	}