<?php
/*******************************************************************************
 * Copyright (c) 2015 Eclipse Foundation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Christopher Guindon (Eclipse Foundation)- initial API and implementation
 *******************************************************************************/
require_once("donation.class.php");

/**
 * Send out Donation Emails
 *
 * @author chrisguindon
 */
class DonationEmails {

  /**
   * Eclipse App class
   *
   * @var stdClass
   */
  private $App = NULL;

  /**
   * Donation Object
   *
   * @var stdClass
   */
  private $Donation = NULL;

  /**
   * Stores different types of codes
   * to use in FOE emails
   *
   * @var array
   */
  private $email_code = array();

  /**
   * The e-mail content
   *
   * @var unknown
   */
  private $email_content = '';

  /**
   * Link for the friends of eclipse
   * @var unknown
   */
  private $email_foe_logo_link = '';

  /**
   * E-mail headers
   *
   * @var unknown
   */
  private $email_headers = '';

  /**
   * Receiving e-mail address
   *
   * @var string
   */
  private $email_to = '';

  /**
   * Store the code and url for a
   * free eclipse t-shirt
   *
   * @var array
   */
  private $email_tshirt_code = array();

  /**
   * Set a table prefix for debug mode
   *
   * @var string
   */
  private $table_prefix = "";

  /**
   * Debug state
   *
   * @var bool
   */
  private $test_mode = FALSE;

  /**
   * Contructor
   *
   * @param stdClass $Donation
   */
  public function DonationEmails($Donation) {
    $this->App = new App();
    $this->Donation = $Donation;
    if ($Donation->table_prefix == 'testing_') {
      $this->_set_test_mode(TRUE);
    }
    $this->_set_email_headers('From: Eclipse Webmaster (automated) <webmaster@eclipse.org>'. PHP_EOL .'Bcc: donate@eclipse.org'. PHP_EOL .'Content-Type: text/plain; charset=UTF-8');
    $this->_set_email_foe_logo_link('https://dev.eclipse.org/site_login/myaccount.php');
    $this->_set_email_code('ECLIPSECON', 'FRIEND');
    $this->_set_email_code('OREILLY', 'PCBW');
  }

  /**
   * Send out donation email
   *
   * This function will determine if an e-mail can be sent
   * and also send out the correct email based of the
   * donation amount.
   */
  public function send_email() {
    $this->_set_email_to($this->Donation->Donor->get_active_email());
    $email_to = $this->_get_email_to();
    if (empty($email_to)) {
      // We dont have an e-mail address from the donation
      return FALSE;
    }

    $transaction_id = $this->Donation->get_donation_txn_id();
    $amount = $this->Donation->get_donation_amount();
    $uid = $this->Donation->Donor->get_donor_uid();
    $level = $this->Donation->get_donation_benefit_level();

    if (empty($uid) && $level != 'donor') {
      // We dont have an eclipse account, we need an extra
      // step from the donor before we can apply benefits.
      $this->_get_email_link_eclipse_account();
    }
    else {
      // Check if the donation is at the "donor" level
      if ($level == 'donor') {
        $this->_get_email_donor();
      }

      // Check if the donation is at the friend, best_friend or webmaster_idol level
      if ($level == 'friend' || $level == 'best_friend' || $level == 'webmaster_idol') {
        $this->_get_email_friend();
      }
    }

    $EventLog = new EvtLog();
    if (!empty($this->email_to) && !empty($this->email_content)) {
      if ($this->_get_test_mode()) {
        $this->email_content .= PHP_EOL . PHP_EOL . '--TEST MODE--' .PHP_EOL . PHP_EOL;
        ob_start();
        print 'This email is addressed to: ' . $this->_get_email_to() .PHP_EOL . PHP_EOL;
        print_r($this);
        $this->email_content .= ob_get_clean();
      }
      mail($this->_get_email_to(),  "Thank You For Your Donation", $this->_get_email_content(), $this->_get_email_headers());
      $EventLog->setPK1($this->_get_email_to());
      $EventLog->setLogAction("DONATION_EMAIL_SENT");
    }
    else {
      $EventLog->setPK1($level);
      $EventLog->setLogAction("DONATION_EMAIL_NOT_SENT");
    }
    $EventLog->setLogTable("__paypal.class"); // To make browsing the log table easier
    $EventLog->setPK2($_SERVER['REMOTE_ADDR']);
    $EventLog->insertModLog($transaction_id);
    return $this->email_content;
  }

  /**
   * Get email code from $email_code array
   *
   * The type could be anything, it's usually set in
   * the constructor
   *
   * @param string $type
   */
  private function _get_email_code($type) {
    if (!isset($this->email_code[$type])) {
      return '';
    }
    return $this->email_code[$type];
  }

  /**
   * Get the e-mail content message
   */
  private function _get_email_content(){
    return $this->email_content;
  }

  /**
   * Get the link for the foe logo page
   */
  private function _get_email_foe_logo_link(){
    return $this->email_foe_logo_link;
  }

  /**
   * Get the default email headers
   *
   * @return string
   */
  private function _get_email_headers(){
    return $this->email_headers;
  }

  /**
   * Get the e-mail adress of the donor
   */
  private function _get_email_to(){
    return $this->email_to;
  }

  /**
   * Get the the code or url for a free t-shirt
   *
   * @param array $type
   *   The type is either "code" or "url"
   *
   * @return string
   */
  private function _get_email_tshirt_code($type) {
    // Check for an existing code for this transaction
    if (!isset($this->email_tshirt_code[$type])) {
      $this->_get_email_existing_tshirt_code();
    }

    // Try to get a new one
    if (!isset($this->email_tshirt_code[$type])) {
      $this->_get_email_new_tshirt_code();
    }

    // We're out of t-shirt code !!
    if (!isset($this->email_tshirt_code[$type])) {
     return '';
    }

    // We found a t-shirt code! Hip Hip Hurray :)
    return $this->email_tshirt_code[$type];
  }

  /**
   * Get testmode status
   * @return boolean
   */
  private function _get_test_mode() {
    return $this->test_mode;
  }

  /**
   * Email for linking an eclipse account with a donation
   *
   * This is needed for a donation from an e-mail that is
   * not an eclipse account.
   */
  private function _get_email_link_eclipse_account(){
    $this->email_content = $this->_get_email_greeting_string();
    $this->email_content .= "Thank you for your donation! We are pleased to welcome you to the Friends of Eclipse program. To take full advantage of the program you will need to create an Eclipse account. This will allow you access to the Friends of Eclipse benefits." . PHP_EOL . PHP_EOL;
    $domain = $this->App->getEclipseDomain();
    $query = array(
      'tid' => $this->Donation->get_donation_txn_id(),
      'iid' => $this->Donation->get_donation_random_invoice_id(),
    );
    $query_string = http_build_query($query);
    $this->email_content .= "To create your Eclipse account go to: https://" . $domain['domain']  . "/donate/link-account.php?" . $query_string  . PHP_EOL . PHP_EOL;
    $this->email_content .= "Best Regards,\n\nMike Milinkovich\nExecutive Director\nEclipse Foundation" . PHP_EOL . PHP_EOL;
  }

  /**
   * Email for a donation of without any benefits
   *
   * This is usually a donation for less than 35US,
   *
   */
  private function _get_email_donor() {
    $email = $this->_get_email_greeting_string();
    $email .= "Thank you for your donation. Your support is greatly appreciated and your donation will help make the Eclipse Platform even better for millions of developers around the world." . PHP_EOL . PHP_EOL;
    $email .= $this->_get_email_footer_string();
    $this->email_content = $email;
  }

  /**
   * Email for a friend of eclipse
   *
   * This is for a donation between 35USD and 99.99USD
   */
  private function _get_email_friend() {
    $domain = $this->App->getEclipseDomain();
    $query = array(
      'tid' => $this->Donation->get_donation_txn_id(),
      'iid' => $this->Donation->get_donation_random_invoice_id(),
    );
    $query_string = http_build_query($query);
    $email = $this->_get_email_greeting_string();
    $email .= "Thank you for your donation. Your support is greatly appreciated and your donation will help make the Eclipse Platform even better for millions of developers around the world." . PHP_EOL . PHP_EOL;
    $email .= "You’ve donated more than 35 USD, which means that you are now a Friend of Eclipse (FoE)!  As a Friend of Eclipse you will now have access to the FoE mirror site and a Friend badge for your Eclipse Account. Use this personalized link to login into your Eclipse Account to get access to the mirror site and the badge: https://" . $domain['domain'] . "/donate/link-account.php?" . $query_string . PHP_EOL . PHP_EOL;
    $email .= "Finally, as a Friend, you also get 40% off print & 50% off ebooks at oreilly.com using the discount code " . $this->_get_email_code('OREILLY') . PHP_EOL . PHP_EOL;
    $email .= $this->_get_email_footer_string();
    $this->email_content = $email;
  }

  /**
   * Get the email message string for an Eclipse t-shirt
   */
  private function _get_email_tshirt_code_message() {
    $code = $this->_get_email_tshirt_code('url');
    if (!empty($code)) {
      return  "\t-\tYou get an Eclipse t-shirt! Claim it here: " . $code . PHP_EOL . PHP_EOL;
    }
    else {
     // Let roxanne know that we are out of t-shirts.
     $headers = 'From: Eclipse Webdev (automated) <webdev@eclipse.org>' . PHP_EOL . 'Content-Type: text/plain; charset=UTF-8';
     $content = 'We are currently out of t-shirt codes. This following user is eligible for a t-shirt. Please contact him manually as soon as possible.';
     ob_start();
     print_r($this);
     $content .= ob_get_clean();
     mail('friends@eclipse.org',  "T-shirt code table is empty", $content, $headers);

     return  "\t-\tYou get an Eclise t-shirt, but we are currently out of stock. We will contact you once our stock is replenished." . PHP_EOL . PHP_EOL;
    }
  }

  /**
   * Fetch a new t-shirt code
   *
   * This function retreive a t-shirt code and
   * consume the code in the database to avoid
   * sending the same code to more than 1 donor.
   */
  private function _get_email_new_tshirt_code() {
    $sql = "SELECT code, url FROM " . $this->Donation->table_prefix . "tshirts WHERE sent_date IS NULL LIMIT 1";
    $code = mysql_fetch_assoc($this->App->eclipse_sql($sql));
    if (!empty($code)) {
      $this->_set_email_tshirt_code($code);
      $this->_update_email_tshirt_consume_code();
    }
  }

  /**
   * Try to find a t-shirt code for a transaction
   */
  private function _get_email_existing_tshirt_code() {
    $sql = "SELECT code, url FROM " . $this->Donation->table_prefix . "tshirts WHERE transaction_id = " .
    $this->App->returnQuotedString($this->App->sqlSanitize($this->Donation->get_donation_txn_id())) .
    " ORDER BY sent_date DESC LIMIT 1";
    $code = mysql_fetch_assoc($this->App->eclipse_sql($sql));

    if (!empty($code)) {
      $this->_set_email_tshirt_code($code);
    }
  }

  /**
   * Get greeting line for donation Emails
   */
  private function _get_email_greeting_string() {
    $full_name = $this->Donation->Donor->get_donor_full_name();
    if (!empty($full_name)) {
      return "Dear " . $this->Donation->Donor->get_donor_full_name() . "," . PHP_EOL . PHP_EOL;
    }
    return "Hello," . PHP_EOL . PHP_EOL;
  }

  private function _get_email_footer_string() {
    $email = "The Eclipse Foundation relies upon our users' generosity to make Eclipse a great place for open source software development. On behalf of the entire community, thank you for making it possible." . PHP_EOL . PHP_EOL;
    $email .= "If you have any questions about your donation please visit http://www.eclipse.org/donate/faq.php or send an email to donate@eclipse.org." . PHP_EOL . PHP_EOL;
    $email .= "Best Regards,\n\nMike Milinkovich\nExecutive Director\nEclipse Foundation" . PHP_EOL . PHP_EOL;
    return $email;
  }

  /**
   * Set email code
   *
   * @param string $type
   * @param string $code
   */
  private function _set_email_code($type, $code){
    $this->email_code[$type] = $code;
  }

  /**
   * Set email message
   * @param string $content
   */
  private function _set_email_content($content){
    $this->email_content = $content;
  }

  /**
   * Set friend of eclipse logo link
   *
   * @param string $url
   */
  private function _set_email_foe_logo_link($url){
    $this->email_foe_logo_link = $url;
  }

  /**
   * Set default e-mail headers
   *
   * @param string $headers
   */
  private function _set_email_headers($headers){
    $this->email_headers = $headers;
  }

  /**
   * Set e-mail to
   * @param string $email_to
   */
  private function _set_email_to($email_to){
    $this->email_to = $email_to;
  }

  /**
   * Set email t-shirt code
   *
   * @param unknown $code
   */
  private function _set_email_tshirt_code($code){
    $this->email_tshirt_code = $code;
  }

  /**
   * Set test mode
   *
   * @param bool $testmode
   */
  private function _set_test_mode($testmode = FALSE) {
    $this->test_mode = $testmode;
  }

  /**
   * Consume a t-shirt code from the database
   */
  private function _update_email_tshirt_consume_code() {
    $sql = "UPDATE " . $this->Donation->table_prefix . "tshirts SET
      sent_date = CURDATE(),
      uid = " .$this->App->returnQuotedString($this->App->sqlSanitize($this->Donation->Donor->get_donor_uid())). ",
      transaction_id = " .$this->App->returnQuotedString($this->App->sqlSanitize($this->Donation->get_donation_txn_id())). ",
      bugzilla_id = " .$this->App->returnQuotedString($this->App->sqlSanitize($this->Donation->Donor->Friend->getBugzillaID()))
    . " WHERE code = " . $this->App->returnQuotedString($this->App->sqlSanitize($this->_get_email_tshirt_code('code')));
    $this->App->eclipse_sql($sql);
  }
}