<?php
class ControllerToolUpload extends Controller {
    private $error = array();

    public function index() {
        $this->load->language('tool/upload');

        $this->document->setTitle($this->language->get('heading_title'));

        $this->load->model('tool/upload');

        $this->getList();
    }

    public function delete() {
        $this->load->language('tool/upload');

        $this->document->setTitle($this->language->get('heading_title'));

        $this->load->model('tool/upload');

        if (isset($this->request->post['selected']) && $this->validateDelete()) {
            foreach ($this->request->post['selected'] as $upload_id) {
                // Remove file before deleting DB record.
                $upload_info = $this->model_tool_upload->getUpload($upload_id);

                if ($upload_info && is_file(DIR_UPLOAD . $upload_info['filename'])) {
                    unlink(DIR_UPLOAD . $upload_info['filename']);
                }

                $this->model_tool_upload->deleteUpload($upload_id);
            }

            $this->session->data['success'] = $this->language->get('text_success');

            $url = '';

            if (isset($this->request->get['filter_name'])) {
                $url .= '&filter_name=' . urlencode(html_entity_decode($this->request->get['filter_name'], ENT_QUOTES, 'UTF-8'));
            }

            if (isset($this->request->get['filter_date_added'])) {
                $url .= '&filter_date_added=' . $this->request->get['filter_date_added'];
            }

            if (isset($this->request->get['sort'])) {
                $url .= '&sort=' . $this->request->get['sort'];
            }

            if (isset($this->request->get['order'])) {
                $url .= '&order=' . $this->request->get['order'];
            }

            if (isset($this->request->get['page'])) {
                $url .= '&page=' . $this->request->get['page'];
            }

            $this->response->redirect($this->url->link('tool/upload', 'token=' . $this->session->data['token'] . $url, true));
        }

        $this->getList();
    }

    protected function getList() {
        if (isset($this->request->get['filter_name'])) {
            $filter_name = $this->request->get['filter_name'];
        } else {
            $filter_name = null;
        }

        if (isset($this->request->get['filter_date_added'])) {
            $filter_date_added = $this->request->get['filter_date_added'];
        } else {
            $filter_date_added = null;
        }

        if (isset($this->request->get['sort'])) {
            $sort = $this->request->get['sort'];
        } else {
            $sort = 'date_added';
        }

        if (isset($this->request->get['order'])) {
            $order = $this->request->get['order'];
        } else {
            $order = 'DESC';
        }

        if (isset($this->request->get['page'])) {
            $page = $this->request->get['page'];
        } else {
            $page = 1;
        }

        $url = '';

        if (isset($this->request->get['filter_name'])) {
            $url .= '&filter_name=' . urlencode(html_entity_decode($this->request->get['filter_name'], ENT_QUOTES, 'UTF-8'));
        }

        if (isset($this->request->get['filter_date_added'])) {
            $url .= '&filter_date_added=' . $this->request->get['filter_date_added'];
        }

        if (isset($this->request->get['sort'])) {
            $url .= '&sort=' . $this->request->get['sort'];
        }

        if (isset($this->request->get['order'])) {
            $url .= '&order=' . $this->request->get['order'];
        }

        if (isset($this->request->get['page'])) {
            $url .= '&page=' . $this->request->get['page'];
        }

        $data['breadcrumbs'] = array();

        $data['breadcrumbs'][] = array(
            'text' => $this->language->get('text_home'),
            'href' => $this->url->link('common/dashboard', 'token=' . $this->session->data['token'], true)
        );

        $data['breadcrumbs'][] = array(
            'text' => $this->language->get('heading_title'),
            'href' => $this->url->link('tool/upload', 'token=' . $this->session->data['token'] . $url, true)
        );

        $data['delete'] = $this->url->link('tool/upload/delete', 'token=' . $this->session->data['token'] . $url, true);

        $data['uploads'] = array();

        $filter_data = array(
            'filter_name'       => $filter_name,
            'filter_date_added' => $filter_date_added,
            'sort'              => $sort,
            'order'             => $order,
            'start'             => ($page - 1) * $this->config->get('config_limit_admin'),
            'limit'             => $this->config->get('config_limit_admin')
        );

        $upload_total = $this->model_tool_upload->getTotalUploads($filter_data);

        $results = $this->model_tool_upload->getUploads($filter_data);

        foreach ($results as $result) {
            $data['uploads'][] = array(
                'upload_id'  => $result['upload_id'],
                'name'       => $result['name'],
                'filename'   => $result['filename'],
                'date_added' => date($this->language->get('date_format_short'), strtotime($result['date_added'])),
                'download'   => $this->url->link('tool/upload/download', 'token=' . $this->session->data['token'] . '&code=' . $result['code'] . $url, true)
            );
        }

        $data['heading_title'] = $this->language->get('heading_title');

        $data['text_list'] = $this->language->get('text_list');
        $data['text_no_results'] = $this->language->get('text_no_results');
        $data['text_confirm'] = $this->language->get('text_confirm');

        $data['column_name'] = $this->language->get('column_name');
        $data['column_filename'] = $this->language->get('column_filename');
        $data['column_date_added'] = $this->language->get('column_date_added');
        $data['column_action'] = $this->language->get('column_action');

        $data['entry_name'] = $this->language->get('entry_name');
        $data['entry_date_added'] = $this->language->get('entry_date_added');

        $data['button_download'] = $this->language->get('button_download');
        $data['button_delete'] = $this->language->get('button_delete');
        $data['button_filter'] = $this->language->get('button_filter');

        $data['token'] = $this->session->data['token'];

        if (isset($this->error['warning'])) {
            $data['error_warning'] = $this->error['warning'];
        } else {
            $data['error_warning'] = '';
        }

        if (isset($this->session->data['success'])) {
            $data['success'] = $this->session->data['success'];

            unset($this->session->data['success']);
        } else {
            $data['success'] = '';
        }

        if (isset($this->request->post['selected'])) {
            $data['selected'] = (array)$this->request->post['selected'];
        } else {
            $data['selected'] = array();
        }

        $url = '';

        if (isset($this->request->get['filter_name'])) {
            $url .= '&filter_name=' . urlencode(html_entity_decode($this->request->get['filter_name'], ENT_QUOTES, 'UTF-8'));
        }

        if (isset($this->request->get['filter_date_added'])) {
            $url .= '&filter_date_added=' . $this->request->get['filter_date_added'];
        }

        if ($order == 'ASC') {
            $url .= '&order=DESC';
        } else {
            $url .= '&order=ASC';
        }

        if (isset($this->request->get['page'])) {
            $url .= '&page=' . $this->request->get['page'];
        }

        $data['sort_name'] = $this->url->link('tool/upload', 'token=' . $this->session->data['token'] . '&sort=name' . $url, true);
        $data['sort_filename'] = $this->url->link('tool/upload', 'token=' . $this->session->data['token'] . '&sort=filename' . $url, true);
        $data['sort_date_added'] = $this->url->link('tool/upload', 'token=' . $this->session->data['token'] . '&sort=date_added' . $url, true);

        $url = '';

        if (isset($this->request->get['filter_name'])) {
            $url .= '&filter_name=' . urlencode(html_entity_decode($this->request->get['filter_name'], ENT_QUOTES, 'UTF-8'));
        }

        if (isset($this->request->get['filter_date_added'])) {
            $url .= '&filter_date_added=' . $this->request->get['filter_date_added'];
        }

        if (isset($this->request->get['sort'])) {
            $url .= '&sort=' . $this->request->get['sort'];
        }

        if (isset($this->request->get['order'])) {
            $url .= '&order=' . $this->request->get['order'];
        }

        $pagination = new Pagination();
        $pagination->total = $upload_total;
        $pagination->page = $page;
        $pagination->limit = $this->config->get('config_limit_admin');
        $pagination->url = $this->url->link('tool/upload', 'token=' . $this->session->data['token'] . $url . '&page={page}', true);

        $data['pagination'] = $pagination->render();

        $data['results'] = sprintf($this->language->get('text_pagination'), ($upload_total) ? (($page - 1) * $this->config->get('config_limit_admin')) + 1 : 0, ((($page - 1) * $this->config->get('config_limit_admin')) > ($upload_total - $this->config->get('config_limit_admin'))) ? $upload_total : ((($page - 1) * $this->config->get('config_limit_admin')) + $this->config->get('config_limit_admin')), $upload_total, ceil($upload_total / $this->config->get('config_limit_admin')));

        $data['filter_name'] = $filter_name;
        $data['filter_date_added'] = $filter_date_added;

        $data['sort'] = $sort;
        $data['order'] = $order;

        $data['header'] = $this->load->controller('common/header');
        $data['column_left'] = $this->load->controller('common/column_left');
        $data['footer'] = $this->load->controller('common/footer');

        $this->response->setOutput($this->load->view('tool/upload', $data));
    }

    protected function validateDelete() {
        if (!$this->user->hasPermission('modify', 'tool/upload')) {
            $this->error['warning'] = $this->language->get('error_permission');
        }

        return !$this->error;
    }

    public function download() {
        $this->load->model('tool/upload');

        if (isset($this->request->get['code'])) {
            $code = $this->request->get['code'];
        } else {
            $code = 0;
        }

        $upload_info = $this->model_tool_upload->getUploadByCode($code);

        if ($upload_info) {
            $file = DIR_UPLOAD . $upload_info['filename'];
            $mask = basename($upload_info['name']);

            if (!headers_sent()) {
                if (is_file($file)) {
                    header('Content-Type: application/octet-stream');
                    header('Content-Description: File Transfer');
                    header('Content-Disposition: attachment; filename="' . ($mask ? $mask : basename($file)) . '"');
                    header('Content-Transfer-Encoding: binary');
                    header('Expires: 0');
                    header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
                    header('Pragma: public');
                    header('Content-Length: ' . filesize($file));

                    readfile($file, 'rb');
                    exit;
                } else {
                    exit('Error: Could not find file ' . $file . '!');
                }
            } else {
                exit('Error: Headers already sent out!');
            }
        } else {
            $this->load->language('error/not_found');

            $this->document->setTitle($this->language->get('heading_title'));

            $data['heading_title'] = $this->language->get('heading_title');

            $data['text_not_found'] = $this->language->get('text_not_found');

            $data['breadcrumbs'] = array();

            $data['breadcrumbs'][] = array(
                'text' => $this->language->get('text_home'),
                'href' => $this->url->link('common/dashboard', 'token=' . $this->session->data['token'], true)
            );

            $data['breadcrumbs'][] = array(
                'text' => $this->language->get('heading_title'),
                'href' => $this->url->link('error/not_found', 'token=' . $this->session->data['token'], true)
            );

            $data['header'] = $this->load->controller('common/header');
            $data['column_left'] = $this->load->controller('common/column_left');
            $data['footer'] = $this->load->controller('common/footer');

            $this->response->setOutput($this->load->view('error/not_found', $data));
        }
    }

    public function upload() {
        $this->load->language('sale/order');

        $json = array();

        // Check user has permission
        if (!$this->user->hasPermission('modify', 'tool/upload')) {
            $json['error'] = $this->language->get('error_permission');
        }

        if (!$json) {
            if (!empty($this->request->files['file']['name']) && is_file($this->request->files['file']['tmp_name'])) {
                // Sanitize the filename
                $filename = html_entity_decode($this->request->files['file']['name'], ENT_QUOTES, 'UTF-8');

                if ((utf8_strlen($filename) < 3) || (utf8_strlen($filename) > 128)) {
                    $json['error'] = $this->language->get('error_filename');
                }

                // Allowed file extension types
                $allowed = array();

                $extension_allowed = preg_replace('~\r?\n~', "\n", $this->config->get('config_file_ext_allowed'));

                $filetypes = explode("\n", $extension_allowed);

                foreach ($filetypes as $filetype) {
                    $allowed[] = trim($filetype);
                }

                if (!in_array(strtolower(substr(strrchr($filename, '.'), 1)), $allowed)) {
                    $json['error'] = $this->language->get('error_filetype');
                }

                // Allowed file mime types
                $allowed = array();

                $mime_allowed = preg_replace('~\r?\n~', "\n", $this->config->get('config_file_mime_allowed'));

                $filetypes = explode("\n", $mime_allowed);

                foreach ($filetypes as $filetype) {
                    $allowed[] = trim($filetype);
                }

                if (!in_array($this->request->files['file']['type'], $allowed)) {
                    $json['error'] = $this->language->get('error_filetype');
                }

                // Check to see if any PHP files are trying to be uploaded
                $content = file_get_contents($this->request->files['file']['tmp_name']);

                if (preg_match('/\<\?php/i', $content)) {
                    $json['error'] = $this->language->get('error_filetype');
                }

                // Return any upload error
                if ($this->request->files['file']['error'] != UPLOAD_ERR_OK) {
                    $json['error'] = $this->language->get('error_upload_' . $this->request->files['file']['error']);
                }
            } else {
                $json['error'] = $this->language->get('error_upload');
            }
        }

        if (!$json) {
            $file = $filename . '.' . token(32);

            if(!is_dir(DIR_UPLOAD)) {
                @mkdir(DIR_UPLOAD, \Config::get('directory_permission', 0777), true);
            }

            move_uploaded_file($this->request->files['file']['tmp_name'], DIR_UPLOAD . $file);

            // Hide the uploaded file name so people can not link to it directly.
            $this->load->model('tool/upload');

            $json['code'] = $this->model_tool_upload->addUpload($filename, $file);

            $json['success'] = $this->language->get('text_upload');
        }

        $this->response->addHeader('Content-Type: application/json');
        $this->response->setOutput(json_encode($json));
    }

}