Flip.php

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class Flip extends CI_Controller {
  private $header_data = array();
  private $data = array();
  private $footer_data = array();
  private $end_user = null; // Used by check_login_validation() to send user's name and email to login()

  /*
   * Load helpers, models, and eveything that should be used by ALL methods
   */
  public function __construct($slug = null) {
    parent::__construct();

    $this->lang->load('flp_flip', 'pt-BR');
    $this->lang->load('form_validation', 'pt-BR');

    $this->load->helper( array('form', 'html', 'url') );

    $this->load->model('company_model', 'company');
    $this->load->model('publication_model', 'publication');
    $this->load->model('edition_model', 'edition');
    $this->load->model('flip_model', 'flip');
  }

  /*
   * Index page
   * It will basically check if the given slug exists (is it a publication or a company?)
   */
  public function index($slug = null) {
    // If slug not found: display about page
    if( $this->display_about_page($slug) ) {
      redirect( 'http://aspintecnologia.com.br/aspin-news' );
    }
    // else slug found, but user not logged in
    elseif( is_null($this->session->userdata('user_email')) ) {
      redirect( base_url('flip/'.$slug.'/login') );
    }
    // else user is logged in
    else {
      redirect( base_url('flip/'.$slug.'/list') );
    }
  } // index()

  /*
   * About ONLY redirects to an URL
   * The last "catch everything" route uses this method
   */
  public function about() {
    redirect( 'http://aspintecnologia.com.br/aspin-news' );
  }

  /*
   * Login page
   * It asks Check Login (web service) if the user (email and password) is an active subscriber
   */
  public function login($slug = null) {
    // Slug not found: display about page
    if( $this->display_about_page($slug) ) redirect( base_url('/') );

    $this->load->library('form_validation');

    /*
    $slug_type = $this->set_slug_type($slug); // 'company' or 'publication'
    */

    $publication = $this->publication->get_publication_by_slug($slug);
    $company_logo = $this->company->get_company_logo($publication->company_cnpj);

    $this->header_data['index_page'] = base_url('flip/'.$slug);
    $this->header_data['title'] = $publication->publication_name;

    $this->header_data['body_classes'] = 'flip flip-login';
    $this->data['slug'] = $slug;
    $this->data['logo'] = $company_logo;
    $this->data['publication'] = $publication;

    if ($this->form_validation->run('flip/login') == false) {
      $this->load->view('shared/header_flip', $this->header_data);
      $this->load->view('flip_login', $this->data);
      $this->load->view('shared/footer_flip');
    }
    else {
      // Set user session
      $flip_user = array(
        'flip_user_email' => $this->end_user['email'],
        'flip_user_name' => $this->end_user['name'],
        'company_cnpj' => $publication->company_cnpj,
      );
      $this->session->set_userdata($flip_user);
      $this->end_user = null;
      // And redirect to flip/$slug/list
      redirect( base_url('flip/'.$slug.'/list') );
    }
  } // login()

  public function logout($slug = null) {
    if( $this->display_about_page($slug) ) redirect( base_url('/') );
    elseif( is_null($this->session->userdata('flip_user_email')) ) { redirect( base_url('flip/'.$slug.'/login') ); }
    else {
      $this->session->sess_destroy();
      redirect( base_url('flip/'.$slug.'/login') );
    }
  } // logout()

  public function list($slug = null) {
    // Slug not found: display about page
    if( $this->display_about_page($slug) ) { redirect( base_url('/') ); }
    elseif( is_null($this->session->userdata('flip_user_email')) ) { redirect( base_url('flip/'.$slug.'/login') ); }
    else {
      /*
      $slug_type = $this->set_slug_type($slug); // 'company' or 'publication'
      */

      $publication = $this->publication->get_publication_by_slug($slug);

      $this->header_data['index_page'] = base_url('flip/'.$slug.'/list');
      $this->header_data['body_classes'] = 'flip flip-list';
      $this->header_data['title'] = $publication->publication_name;
      $this->header_data['header_color'] = $publication->publication_header_color;
      $this->header_data['header_style'] = $publication->publication_color_lightness;
      $this->header_data['logo'] = $publication->publication_logo;
      $this->header_data['slug'] = $slug;

      //$limit = $this->month_number_of_days();

      $this->data['editions'] = $this->flip->get_editions($publication->publication_id, 30);

      $this->load->view('shared/header_flip', $this->header_data);
      $this->load->view('flip_list', $this->data);
      $this->load->view('shared/footer_flip');
    }
  } // list()

  public function view($slug = null, $info = null) {
    $edition_id = $this->flip->encrypt_decrypt_edition_id($info, 'decrypt');

    // Slug not found: display about page
    if( $this->display_about_page($slug) ) { redirect( base_url('/') ); }
    // User no logged in
    elseif( is_null($this->session->userdata('flip_user_email')) ) { redirect( base_url('flip/'.$slug.'/login') ); }
    // Hash not set or Edition ID not found from hash
    elseif( is_null($info) || $edition_id == false ) { redirect( base_url('flip/'.$slug.'/list') ); }
    // Display edition
    else {
      /*
      $slug_type = $this->set_slug_type($slug); // 'company' or 'publication'
      */

      $edition = $this->edition->get_edition_by_id($edition_id);
      $publication = $this->publication->get_publication_by_id($edition->publication_id);

      $date = date_create($edition->edition_date);
      $date = date_format($date, 'd\/m\/Y');

      $title = $publication->publication_name . ' Edição: ' . $edition->edition_number . ' Data: ' . $date;

      $this->header_data['index_page'] = base_url('flip/'.$slug.'/list');
      $this->header_data['title'] = $title;
      $this->header_data['body_classes'] = 'flip flip-view';
      $this->header_data['publication'] = $publication;
      $this->header_data['slug'] = $slug;
      $this->header_data['display_edition'] = true;
      $this->header_data['back_btn'] = array('location' => 'view', 'slug' => $slug, 'name' => $publication->publication_name);

      $this->data['edition'] = $edition;

      $this->footer_data['display_edition'] = true;
      $this->footer_data['edition'] = $edition;
      $this->footer_data['publication'] = $publication;

      $this->load->view('shared/header_flip', $this->header_data);
      $this->load->view('flip_view', $this->data);
      $this->load->view('shared/footer_flip');
    }
  } // view()

  /*
   * Helper functions
   */

  public function display_about_page( $slug ) {
    $about_page = false;

    // No slug given in the URL
    if( $slug == null ) $about_page = true;

    // Slug doesn't exist in BOTH flp_company and flp_publication
    if( $this->publication->publication_slug_exists($slug) == false &&
        $this->company->company_slug_exists($slug) == false
      ) {
      $about_page = true;
    }

    return $about_page;
  } // display_about_page()

  public function set_slug_type( $slug ) {
    if( $this->publication->publication_slug_exists($slug) ) return 'publication';
    else return 'company';
    // at this point display_about_page() already checked that
    // either a publication or a company exists for a given slug
  } // set_slug_type()

  // https://davidwalsh.name/checking-for-leap-year-using-php
  function is_leap_year($year) {
    return ((($year % 4) == 0) && ((($year % 100) != 0) || (($year % 400) == 0)));
  }

  public function month_number_of_days() {
    date_default_timezone_set('America/Sao_Paulo');
    $current_month = date('n');
    $current_year = date('Y');

    // Decide how many days for query $limit
    switch ($current_month) {
      case 1:
      case 3:
      case 5:
      case 7:
      case 8:
      case 10:
      case 12:
        return 31;
        break;

      case 2:
        if( $this->is_leap_year($current_year) ) $limit = 29;
        return 28;
        break;

      case 4:
      case 6:
      case 9:
      case 11:
        return 30;
        break;
    }
  }

  /*
   * Form validation functions
   */

  public function check_login_validation() {

    /*
     * DO NOT ever tell the user what is wrong (email or password)
     */

    if( is_null($this->input->post('flip-login-user')) ||
        is_null($this->input->post('flip-login-pass')) ||
        is_null($this->input->post('slug')) ||
        strlen($this->input->post('flip-login-user')) == 0 ||
        strlen($this->input->post('flip-login-pass')) == 0 ||
        $this->publication->publication_slug_exists($this->input->post('slug')) == false ) {
      // Fields unset or blank
      $this->form_validation->set_message('check_login_validation', $this->lang->line('flip_login_generic_error'));
      return false;
    }
    else {
      $publication = $this->publication->get_publication_by_slug($this->input->post('slug'));

      // Prepare URL for get request
      $user_exists_url = array();
      $user_exists_url[] = $publication->publication_check_login_url;
      $user_exists_url[] = 'check/new/login/' . $this->input->post('flip-login-user') . '/';
      $user_exists_url[] = 'password/' . $this->input->post('flip-login-pass');
      $user_exists_url = implode('', $user_exists_url);

      // Check if user exists
      $user_exists = false;
      $ch = curl_init();
      curl_setopt($ch, CURLOPT_URL, $user_exists_url);
      curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
      $result = curl_exec($ch);
      curl_close($ch);

      /*
       $result
       0 - concluí­do com sucesso
       1 - e-mail não encontrado
       2 - senha inválida
       */
      $result = substr($result, 0, 1);

      switch ($result) {
        case '0':
          $user_exists = true;
          break;

        case '1':
        case '2':
          $this->form_validation->set_message('check_login_validation', $this->lang->line('flip_login_generic_error'));
          return false;
          break;

        default:
          $this->form_validation->set_message('check_login_validation', sprintf($this->lang->line('flip_login_generic_error_with_code'), '101')); // Code 101 for debugging purposes, do NOT expose details
          return false;
          break;
      }

      // Check if subscription is active
      if( $user_exists ) {
        $vehicles = unserialize($publication->publication_vehicle_number);

        $vehicle_values = '';
        foreach ($vehicles as $vehicle) {
          $vehicle_values .= 'vehicle='.$vehicle.'&';
        }
        $vehicle_values = rtrim($vehicle_values, '&');

        // Prepare URL for get request
        $subscription_active_url = array();
        $subscription_active_url[] = $publication->publication_check_login_url;
        $subscription_active_url[] = 'check/signature/actual/login/' . $this->input->post('flip-login-user') . '/';
        $subscription_active_url[] = 'password/' . $this->input->post('flip-login-pass');
        $subscription_active_url[] = '?' . $vehicle_values;
        $subscription_active_url = implode('', $subscription_active_url);

        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $subscription_active_url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        $result = curl_exec($ch);
        curl_close($ch);

        /*
         $result:
         {"nmcliente":"NOME DO CLIENTE","tpvigente":false,"nuqtdeexemplares":0}
         */
        $result = json_decode($result);

        if( is_null($result) ) {
          $this->form_validation->set_message('check_login_validation', sprintf($this->lang->line('flip_login_generic_error_with_code'), '102')); // Code 102 for debugging purposes, do NOT expose details
          return false;
        }
        if( $result->tpvigente ) {
          $this->end_user = array(
            'email' => strtolower($result->nmcliente),
            'name' => ucwords(strtolower($result->nmcliente))
          );
          return true;
        }
        else {
          $this->form_validation->set_message('check_login_validation', sprintf($this->lang->line('flip_login_renew_subscription'), ucwords(strtolower($result->nmcliente))));
          return false;
        }
      }
      else {
        $this->form_validation->set_message('check_login_validation', $this->lang->line('flip_login_generic_error'));
        return false;
      }
    }
  } // check_login_validation()

}