print_mail.module in Printer, email and PDF versions 5.4

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print_mail/print_mail.module
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<?php

/**
 * @file
 * Displays Printer-friendly versions of Drupal pages.
 *
 * @ingroup print
 */
include_once 'print_mail.inc';
include_once 'print_mail.admin.inc';
define('PRINTMAIL_PATH', 'printmail');
define('PRINT_MAIL_FORMAT', 'mail');
define('PRINT_MAIL_LINK_POS_DEFAULT', 'link');
define('PRINT_MAIL_LINK_TEASER_DEFAULT', 0);
define('PRINT_MAIL_SHOW_LINK_DEFAULT', 1);
define('PRINT_MAIL_NODE_LINK_VISIBILITY_DEFAULT', 0);
define('PRINT_MAIL_NODE_LINK_PAGES_DEFAULT', '');
define('PRINT_MAIL_LINK_CLASS_DEFAULT', 'print-mail');
define('PRINT_MAIL_SYS_LINK_VISIBILITY_DEFAULT', 1);
define('PRINT_MAIL_SYS_LINK_PAGES_DEFAULT', '');
define('PRINT_MAIL_LINK_USE_ALIAS_DEFAULT', 0);
define('PRINT_MAIL_BOOK_LINK_DEFAULT', 1);
define('PRINT_MAIL_HOURLY_THRESHOLD', 3);
define('PRINT_MAIL_TEASER_DEFAULT_DEFAULT', 1);
define('PRINT_MAIL_TEASER_CHOICE_DEFAULT', 1);
define('PRINT_MAIL_SEND_OPTION_DEFAULT', 'sendpage');
define('PRINT_MAIL_JOB_QUEUE_DEFAULT', 0);

/**
 * Implementation of hook_perm().
 */
function print_mail_perm() {
  return array(
    'access send to friend',
  );
}

/**
 * Implementation of hook_menu().
 */
function print_mail_menu($may_cache) {
  $items = array();
  if ($may_cache) {
    $items[] = array(
      'path' => 'admin/settings/print/email',
      'title' => t('e-mail'),
      'callback' => 'drupal_get_form',
      'callback arguments' => array(
        'print_mail_settings',
      ),
      'access' => user_access('administer print'),
      'weight' => 2,
      'type' => MENU_LOCAL_TASK,
    );
    $items[] = array(
      'path' => 'admin/settings/print/email/options',
      'title' => t('Options'),
      'weight' => 1,
      'type' => MENU_DEFAULT_LOCAL_TASK,
    );
    $items[] = array(
      'path' => 'admin/settings/print/email/strings',
      'title' => t('Text strings'),
      'callback' => 'drupal_get_form',
      'callback arguments' => array(
        'print_mail_strings_settings',
      ),
      'access' => user_access('administer print'),
      'weight' => 2,
      'type' => MENU_LOCAL_TASK,
    );
  }
  else {
    $items[] = array(
      'path' => PRINTMAIL_PATH,
      'title' => t('Send page by e-mail'),
      'callback' => 'drupal_get_form',
      'callback arguments' => array(
        'print_mail_form',
      ),
      'access' => _print_mail_access('access send to friend'),
      'type' => MENU_CALLBACK,
    );
  }
  return $items;
}

/**
 * Implementation of hook_requirements().
 */
function print_mail_requirements($phase) {
  $requirements = array();
  $t = get_t();
  switch ($phase) {
    case 'runtime':

      // If the input format used by mimemail includes the HTML filter or the line break converter filter, then warn the administrator of the incompatibility
      // in case that module's Use mime mail for all messages is set and the used input format would modify the sent e-mail
      if (module_exists('mimemail') && variable_get('mimemail_alter', 0)) {
        $format = variable_get('mimemail_format', FILTER_FORMAT_DEFAULT);
        $format = filter_resolve_format($format);
        $filters = filter_list_format($format);
        if (array_key_exists('filter/0', $filters) || array_key_exists('filter/2', $filters)) {
          $requirements['print_mail_mimemail'] = array(
            'title' => $t('Send by e-mail'),
            'value' => l($t('Mime Mail configuration'), 'admin/settings/mimemail'),
            'description' => $t("The current configuration of the Mime Mail module creates problems with the 'Send to Friend' function. Either disable Mime Mail's <em>Use mime mail for all messages</em> or disable the <em>HTML filter</em> and <em>Line break converter</em> filters in the input format used by that module (when the format is not selectable in that module's settings form, the default format is used)."),
            'severity' => REQUIREMENT_WARNING,
          );
        }
      }
      break;
  }
  return $requirements;
}

/**
 * Implementation of hook_block().
 */
function print_mail_block($op = 'list', $delta = 0, $edit = array()) {
  switch ($op) {
    case 'list':
      $block[0]['info'] = t('Most emailed');
      return $block;
      break;
    case 'configure':
      return '';
    case 'save':
      return;
    case 'view':
      switch ($delta) {
        case 0:
          $block['subject'] = t('Most emailed');
          $result = db_query_range("SELECT path FROM {print_mail_page_counter} ORDER BY sentcount DESC", 0, 3);
          if (db_affected_rows()) {
            $block['content'] = '<div class="item-list"><ul>';
            while ($obj = db_fetch_object($result)) {
              $block['content'] .= '<li>' . l(_print_get_title($obj->path), $obj->path) . '</li>';
            }
            $block['content'] .= '</ul></div>';
          }
          break;
      }
      return $block;
      break;
  }
}

/**
 * Implementation of hook_link().
 */
function print_mail_link($type, $node = NULL, $teaser = FALSE) {
  $print_mail_link_pos = variable_get('print_mail_link_pos', array(
    PRINT_MAIL_LINK_POS_DEFAULT => PRINT_MAIL_LINK_POS_DEFAULT,
  ));
  $print_mail_link_use_alias = variable_get('print_mail_link_use_alias', PRINT_MAIL_LINK_USE_ALIAS_DEFAULT);
  $allowed_type = print_mail_link_allowed(array(
    'type' => $type,
    'node' => $node,
    'teaser' => $teaser,
  ));
  if ($allowed_type && !empty($print_mail_link_pos['link'])) {
    drupal_add_css(drupal_get_path('module', 'print') . '/css/printlinks.css');
    $links = array();
    $format = theme('print_mail_format_link');

    // Show book link
    if ($allowed_type === PRINT_ALLOW_BOOK_LINK) {
      $links['book_mail'] = array(
        'href' => PRINTMAIL_PATH . '/book/export/html/' . $node->nid,
        'title' => $format['text'],
        'attributes' => $format['attributes'],
        'html' => $format['html'],
      );
      return $links;
    }
    elseif ($allowed_type === PRINT_ALLOW_NORMAL_LINK) {
      $query_arr = $_GET;
      if ($type == 'comment') {
        $query_arr['comment'] = $node->cid;
      }
      $query = print_query_string_encode($query_arr, array(
        'q',
      ));
      if (empty($query)) {
        $query = NULL;
      }
      if ($print_mail_link_use_alias) {
        $path = drupal_get_path_alias('node/' . $node->nid);
      }
      else {
        $path = $node->nid;
      }
      $links['print_mail'] = array(
        'href' => PRINTMAIL_PATH . '/' . $path,
        'title' => $format['text'],
        'attributes' => $format['attributes'],
        'html' => $format['html'],
        'query' => $query,
      );
      return $links;
    }
  }
  else {
    return;
  }
}

/**
 * Implementation of hook_help().
 */
function print_mail_help($path) {
  $print_mail_link_pos = variable_get('print_mail_link_pos', array(
    PRINT_MAIL_LINK_POS_DEFAULT => PRINT_MAIL_LINK_POS_DEFAULT,
  ));
  if (preg_match('!^node/\\d+$!', $path) == 0 && !(empty($print_mail_link_pos['link']) && empty($print_mail_link_pos['corner']))) {
    static $output = FALSE;
    if ($output === FALSE) {
      $output = TRUE;
      $link = print_mail_insert_link();
      if ($link) {
        return "<span class='print-syslink'>{$link}</span>";
      }
    }
  }
}

/**
 * Implementation of hook_nodeapi().
 */
function print_mail_nodeapi(&$node, $op = 'view', $teaser, $page) {
  switch ($op) {
    case 'view':

      // Insert content corner links
      $print_mail_link_pos = variable_get('print_mail_link_pos', array(
        PRINT_MAIL_LINK_POS_DEFAULT => PRINT_MAIL_LINK_POS_DEFAULT,
      ));
      if ($teaser === FALSE && !empty($print_mail_link_pos['corner']) && !isset($node->printing)) {
        $node->content['print_links']['#value'] .= print_mail_insert_link(NULL, $node);
      }
      break;
    case 'load':
      _print_mail_set_node_fields($node);
      break;
    case 'insert':
    case 'update':
      if (user_access('administer print') || user_access('node-specific print configuration')) {
        if ($node->print_mail_display === NULL) {
          $node->print_mail_display = variable_get('print_mail_display_' . $node->type, PRINT_TYPE_SHOW_LINK_DEFAULT);
        }
        if ($node->print_mail_display_comment === NULL) {
          $node->print_mail_display_comment = variable_get('print_mail_display_comment_' . $node->type, PRINT_TYPE_COMMENT_LINK_DEFAULT);
        }
        if ($node->print_mail_display_urllist === NULL) {
          $node->print_mail_display_urllist = variable_get('print_mail_display_urllist_' . $node->type, PRINT_TYPE_URLLIST_DEFAULT);
        }
        _print_mail_node_conf_modify($node->nid, $node->print_mail_display, $node->print_mail_display_comment, $node->print_mail_display_urllist);
      }
      break;
    case 'delete':
      db_query("DELETE FROM {print_mail_node_conf} WHERE nid = %d", $node->nid);
      db_query("DELETE FROM {print_mail_page_counter} WHERE path = 'node/%d'", $node->nid);
      break;
  }
}

/**
 * Implementation of hook_form_alter().
 */
function print_mail_form_alter($form_id, &$form) {

  // Add the node-type settings option to activate the mail version link
  if ((user_access('administer print') || user_access('node-specific print configuration')) && ($form_id == 'node_type_form' || isset($form['type']) && isset($form['#node']) && $form['type']['#value'] . '_node_form' == $form_id)) {
    $form['print']['mail_label'] = array(
      '#type' => 'markup',
      '#value' => '<p><strong>' . t('Send by e-mail') . '</strong></p>',
    );
    $form['print']['print_mail_display'] = array(
      '#type' => 'checkbox',
      '#title' => t('Show link'),
    );
    $form['print']['print_mail_display_comment'] = array(
      '#type' => 'checkbox',
      '#title' => t('Show link in individual comments'),
    );
    $form['print']['print_mail_display_urllist'] = array(
      '#type' => 'checkbox',
      '#title' => t('Show Printer-friendly URLs list'),
    );
    if ($form_id == 'node_type_form') {
      $form['print']['print_mail_display']['#default_value'] = variable_get('print_mail_display_' . $form['#node_type']->type, PRINT_TYPE_SHOW_LINK_DEFAULT);
      $form['print']['print_mail_display_comment']['#default_value'] = variable_get('print_mail_display_comment_' . $form['#node_type']->type, PRINT_TYPE_COMMENT_LINK_DEFAULT);
      $form['print']['print_mail_display_urllist']['#default_value'] = variable_get('print_mail_display_urllist_' . $form['#node_type']->type, PRINT_TYPE_URLLIST_DEFAULT);
    }
    else {
      $node = $form['#node'];
      $form['print']['print_mail_display']['#default_value'] = isset($node->print_mail_display) ? $node->print_mail_display : variable_get('print_mail_display_' . $node->type, PRINT_TYPE_SHOW_LINK_DEFAULT);
      $form['print']['print_mail_display_comment']['#default_value'] = isset($node->print_mail_display_comment) ? $node->print_mail_display_comment : variable_get('print_mail_display_comment_' . $node->type, PRINT_TYPE_COMMENT_LINK_DEFAULT);
      $form['print']['print_mail_display_urllist']['#default_value'] = isset($node->print_mail_display_urllist) ? $node->print_mail_display_urllist : variable_get('print_mail_display_urllist_' . $node->type, PRINT_TYPE_URLLIST_DEFAULT);
    }
  }
}

/**
 * Implementation of hook_job_queue_functions().
 */
function print_mail_job_queue_functions() {
  $functions['print_mail'] = array(
    'title' => t('Send to friend'),
  );
  return $functions;
}

/**
 * Access callback to check a combination of user_acess() and page access
 *
 * @param $permission
 *   permission required to view the page
 * @return
 *   TRUE if the user has permission to view the page, FALSE otherwise
 */
function _print_mail_access($permission) {
  $page_access = TRUE;
  $parts = explode('/', $_GET['q']);
  if ($parts[0] == PRINTMAIL_PATH && count($parts) > 1) {
    unset($parts[0]);
    $path = implode('/', $parts);
    if (is_numeric($parts[1])) {
      $path = 'node/' . $path;
    }
    else {
      $path = drupal_get_normal_path($path);
    }
    if (preg_match('!^node/(\\d+)$!', $path, $matches) == 1) {
      $page_access = node_access('view', node_load($matches[1]));
    }
    elseif (preg_match('!^book/export/html/(\\d+)$!', $path, $matches) == 1) {
      $page_access = user_access('see printer-friendly version') && node_access('view', node_load($matches[1]));
    }
    else {
      if (!($router_item = menu_get_item(NULL, $path)) || !$router_item['access']) {
        $page_access = FALSE;
      }
    }
  }
  return user_access($permission) && $page_access;
}

/**
 * Auxiliary function to assign the per-node settings to the node object fields
 *
 * @param $node
 *   node to be modified
 */
function _print_mail_set_node_fields(&$node) {
  if (isset($node->nid)) {
    $res = db_fetch_object(db_query("SELECT link, comments, url_list FROM {print_mail_node_conf} WHERE nid = %d", $node->nid));
  }
  else {
    $res = FALSE;
  }
  $node->print_mail_display = $res ? intval($res->link) : variable_get('print_mail_display_' . $node->type, PRINT_TYPE_SHOW_LINK_DEFAULT);
  $node->print_mail_display_comment = $res ? intval($res->comments) : variable_get('print_mail_display_comment_' . $node->type, PRINT_TYPE_COMMENT_LINK_DEFAULT);
  $node->print_mail_display_urllist = $res ? intval($res->url_list) : variable_get('print_mail_display_urllist_' . $node->type, PRINT_TYPE_URLLIST_DEFAULT);
}

/**
 * Update the print_mail_node_conf table to reflect the given attributes
 * If updating to the default values, delete the record.
 *
 * @param $nid
 *   value of the nid field (primary key)
 * @param $link
 *   value of the link field (0 or 1)
 * @param $comments
 *   value of the comments field (0 or 1)
 * @param $url_list
 *   value of the url_list field (0 or 1)
 */
function _print_mail_node_conf_modify($nid, $link, $comments, $url_list) {
  db_query("UPDATE {print_mail_node_conf} SET link = %d, comments = %d, url_list = %d WHERE nid = %d", $link, $comments, $url_list, $nid);
  if (!db_affected_rows()) {
    @db_query("INSERT INTO {print_mail_node_conf} (nid, link, comments, url_list) VALUES (%d, %d, %d, %d)", $nid, $link, $comments, $url_list);
  }
}

/**
 * Format the send by e-mail link
 *
 * @return
 *   array of formatted attributes
 * @ingroup themeable
 */
function theme_print_mail_format_link() {
  $print_mail_link_class = variable_get('print_mail_link_class', PRINT_MAIL_LINK_CLASS_DEFAULT);
  $print_mail_show_link = variable_get('print_mail_show_link', PRINT_MAIL_SHOW_LINK_DEFAULT);
  $print_mail_link_text = filter_xss(variable_get('print_mail_link_text', t('Send to friend')));
  $img = drupal_get_path('module', 'print') . '/icons/mail_icon.gif';
  $title = t('Send this page by e-mail.');
  $class = strip_tags($print_mail_link_class);
  $new_window = FALSE;
  $format = _print_format_link_aux($print_mail_show_link, $print_mail_link_text, $img);
  return array(
    'text' => $format['text'],
    'html' => $format['html'],
    'attributes' => print_fill_attributes($title, $class, $new_window),
  );
}

/**
 * Auxiliary function to display a formatted send by e-mail link
 *
 * Function made available so that developers may call this function from
 * their defined pages/blocks.
 *
 * @param $path
 *   path of the original page (optional). If not specified, the current URL
 *   is used
 * @param $node
 *   an optional node object, to be used in defining the path, if used, the
 *   path argument is irrelevant
 * @return
 *   string with the HTML link to the printer-friendly page
 */
function print_mail_insert_link($path = NULL, $node = NULL) {
  if ($node !== NULL) {
    $nid = $node->nid;
    $path = 'node/' . $nid;
    $allowed_type = print_mail_link_allowed(array(
      'node' => $node,
    ));
  }
  else {
    if ($path === NULL) {
      $nid = preg_replace('!^node/!', '', $_GET['q']);
      $path = $_GET['q'];
    }
    else {
      $nid = NULL;
    }
    $allowed_type = print_mail_link_allowed(array(
      'path' => $path,
    ));
  }
  if ($allowed_type) {
    if ($nid !== NULL) {
      if ($allowed_type === PRINT_ALLOW_BOOK_LINK) {
        $path = 'book/export/html/' . $nid;
      }
      else {
        if (variable_get('print_mail_link_use_alias', PRINT_MAIL_LINK_USE_ALIAS_DEFAULT)) {
          $path = drupal_get_path_alias($path);
        }
        else {
          $path = $nid;
        }
      }
      $path = PRINTMAIL_PATH . '/' . $path;
      $query = print_query_string_encode($_GET, array(
        'q',
      ));
      if (empty($query)) {
        $query = NULL;
      }
    }
    else {
      $query = NULL;
    }
    drupal_add_css(drupal_get_path('module', 'print') . '/css/printlinks.css');
    $format = theme('print_mail_format_link');
    return '<span class="print_mail">' . l($format['text'], $path, $format['attributes'], $query, NULL, TRUE, $format['html']) . '</span>';
  }
  else {
    return FALSE;
  }
}

/**
 * Determine a the link to send by e-mail is allowed depending on all possible settings
 *
 * @param $args
 *   array containing the possible parameters:
 *    teaser, node, type, path
 * @return
 *   FALSE if not allowed
 *   PRINT_ALLOW_NORMAL_LINK if a normal link is allowed
 *   PRINT_ALLOW_BOOK_LINK if a link is allowed in a book node
 */
function print_mail_link_allowed($args) {
  if (!empty($args['teaser']) && !variable_get('print_mail_link_teaser', PRINT_MAIL_LINK_TEASER_DEFAULT) || !user_access('access send to friend')) {

    // If the teaser link is disabled or the user is not allowed
    return FALSE;
  }
  if (!empty($args['path'])) {
    $nid = preg_replace('!^node/!', '', drupal_get_normal_path($args['path']));
    if (is_numeric($nid)) {
      $args['node'] = node_load($nid);
    }
  }
  if (!empty($args['node'])) {
    static $node_type = FALSE;
    $node = $args['node'];
    if (isset($node->type)) {
      $node_type = $node->type;
    }

    // Node
    $print_mail_node_link_visibility = variable_get('print_mail_node_link_visibility', PRINT_MAIL_NODE_LINK_VISIBILITY_DEFAULT);
    $print_mail_node_link_pages = variable_get('print_mail_node_link_pages', PRINT_MAIL_NODE_LINK_PAGES_DEFAULT);
    if (!_print_page_match($print_mail_node_link_visibility, "node/" . $node->nid, $print_mail_node_link_pages)) {

      // Page not in visibility list
      return FALSE;
    }
    elseif (isset($args['type']) && $args['type'] == 'comment' && isset($node_type)) {

      // Link is for a comment, return the configured setting
      $res = db_fetch_object(db_query("SELECT comments FROM {print_mail_node_conf} WHERE nid = %d", $node->nid));
      $print_display_comment = $res ? intval($res->comments) : variable_get('print_mail_display_comment_' . $node_type, PRINT_TYPE_COMMENT_LINK_DEFAULT);
      if ($print_display_comment) {
        return PRINT_ALLOW_NORMAL_LINK;
      }
    }
    else {

      // Node link
      if (!$node->print_mail_display) {

        // Link for this node is disabled
        return FALSE;
      }
      elseif (isset($node->parent)) {

        // Node is a book;
        $print_mail_book_link = variable_get('print_mail_book_link', PRINT_MAIL_BOOK_LINK_DEFAULT);
        switch ($print_mail_book_link) {
          case 1:
            if (user_access('see printer-friendly version')) {
              return PRINT_ALLOW_BOOK_LINK;
            }
            break;
          case 2:
            return PRINT_ALLOW_NORMAL_LINK;
        }
      }
      else {
        return PRINT_ALLOW_NORMAL_LINK;
      }
    }
  }
  else {

    // 'System' page
    $print_mail_sys_link_visibility = variable_get('print_mail_sys_link_visibility', PRINT_MAIL_SYS_LINK_VISIBILITY_DEFAULT);
    $print_mail_sys_link_pages = variable_get('print_mail_sys_link_pages', PRINT_MAIL_SYS_LINK_PAGES_DEFAULT);
    return _print_page_match($print_mail_sys_link_visibility, $_GET['q'], $print_mail_sys_link_pages);
  }
  return FALSE;
}
Functions

Name	Description
print_mail_block	Implementation of hook_block().
print_mail_form_alter	Implementation of hook_form_alter().
print_mail_help	Implementation of hook_help().
print_mail_insert_link	Auxiliary function to display a formatted send by e-mail link
print_mail_job_queue_functions	Implementation of hook_job_queue_functions().
print_mail_link	Implementation of hook_link().
print_mail_link_allowed	Determine a the link to send by e-mail is allowed depending on all possible settings
print_mail_menu	Implementation of hook_menu().
print_mail_nodeapi	Implementation of hook_nodeapi().
print_mail_perm	Implementation of hook_perm().
print_mail_requirements	Implementation of hook_requirements().
theme_print_mail_format_link	Format the send by e-mail link
_print_mail_access	Access callback to check a combination of user_acess() and page access
_print_mail_node_conf_modify	Update the print_mail_node_conf table to reflect the given attributes If updating to the default values, delete the record.
_print_mail_set_node_fields	Auxiliary function to assign the per-node settings to the node object fields
Constants

Name	Description
PRINTMAIL_PATH
PRINT_MAIL_BOOK_LINK_DEFAULT
PRINT_MAIL_FORMAT
PRINT_MAIL_HOURLY_THRESHOLD
PRINT_MAIL_JOB_QUEUE_DEFAULT
PRINT_MAIL_LINK_CLASS_DEFAULT
PRINT_MAIL_LINK_POS_DEFAULT
PRINT_MAIL_LINK_TEASER_DEFAULT
PRINT_MAIL_LINK_USE_ALIAS_DEFAULT
PRINT_MAIL_NODE_LINK_PAGES_DEFAULT
PRINT_MAIL_NODE_LINK_VISIBILITY_DEFAULT
PRINT_MAIL_SEND_OPTION_DEFAULT
PRINT_MAIL_SHOW_LINK_DEFAULT
PRINT_MAIL_SYS_LINK_PAGES_DEFAULT
PRINT_MAIL_SYS_LINK_VISIBILITY_DEFAULT
PRINT_MAIL_TEASER_CHOICE_DEFAULT
PRINT_MAIL_TEASER_DEFAULT_DEFAULT
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print_mail.module in Printer, email and PDF versions 5.4

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