<?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 $Donation
   */
  public function __construct($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 .'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();
    $level = $this->Donation->get_donation_benefit_level();

    // 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();
    // Bug 519257 - Donations spam
    $fields = array(
      'LogAction' => "DONATION_EMAIL_SENT",
      'PK1' => $this->_get_email_to(),
      'uid' => $transaction_id
    );
    $evt_log_results = EvtLog::fetchLogRecord($fields);
    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();
      }
      $EventLog->setPK1($this->_get_email_to());
      if (empty($evt_log_results)) {
        mail($this->_get_email_to(), "Thank You For Your Donation", $this->_get_email_content(), $this->_get_email_headers());
        $EventLog->setLogAction("DONATION_EMAIL_SENT");
      }
      else {
        $EventLog->setLogAction("DONATION_EMAIL_ALREADY_SENT");
      }
    }
    else {
      $EventLog->setPK1($level);
      $EventLog->setLogAction("DONATION_EMAIL_NOT_SENT");
    }

    // To make browsing the log table easier
    $EventLog->setLogTable("__paypal.class");
    $EventLog->setPK2($_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 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 Community even better for millions of developers and users 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 Community even better for millions of developers and users 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)! You will now be identified as a FoE with a Friend badge for your Eclipse Account and Bugzilla. Use this personalized link to login into your Eclipse Account to get access to 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);
  }
}