<?php
// $Id: pdfview_views.module,v 1.12.2.3 2007/01/19 00:22:46 merlinofchaos Exp $

/**
 * Provide views plugins for the feed types we support.
 */
function pdfview_views_views_style_plugins() {
  return array(
    'pdfview_views' => array(
      'name' => t('PDFview: Output PDF-file'),
      'theme' => 'pdfview_views_pdf_output',
      'needs_table_header' => TRUE,
      'needs_fields' => TRUE,
      'even_empty' => TRUE,
    ),
  );
}

/**
 * While we support the global selector, some might want to allow
 * ONLY RSS feeds so we support a stingy selector too
 */
function pdfview_views_views_arguments() {
  $arguments = array(
    'pdf_output' => array(
      'name' => t('PDFview: PDF output Selector'),
      'handler' => 'views_handler_arg_pdf_output',
      'help' => t('This argument specifies a specific PDF output selector.'),
    ),
  );
  return $arguments;
}

/**
 * handler for our own RSS argument; mimics the feed selector
 */
function views_handler_arg_pdf_output($op, &$query, $argtype, $arg = '') {
  switch($op) {
    case 'summary':
    case 'sort':
    case 'link':
    case 'title':
      break;
    case 'filter':
      // This is a clone of the default selector, but it just invokes ours
      // rather than calling all of them.
      pdfview_views_pdf_output_argument('argument', $GLOBALS['current_view'], $arg);
  }
}

/**
 * post view for our own op -- mimics the feed selector
 */
function pdfview_views_views_post_view($view, $items, $output) {
  foreach ($view->argument as $id => $argument) {
    if ($argument['type'] == 'pdf_output') {
      $feed = $id;
      break;
    }
  }

  if ($feed !== NULL) {
    return pdfview_views_pdf_output_argument('post_view', $view, 'pdf_output');
  }
}

/**
 * feed argument hook that will convert us to RSS or display an icon.
 * the 4th argument isn't part of the hook, but we use it to differentiate
 * when called as a hook or when called manually from pdfview_views_views_post_view
 */
function pdfview_views_pdf_output_argument($op, &$view, $arg) {
  if ($op == 'argument' && $arg == 'pdf') {
    $view->page_type = 'pdfview_views';
  }
  else if ($op == 'post_view') {
    $args = views_post_view_make_args($view, $arg, 'pdf');
    $url = views_get_url($view, $args);
    $title = views_get_title($view, 'page', $args);

    if ($view->used_filters) {
      $filters = drupal_query_string_encode($view->used_filters);
    }

//    drupal_add_feed(url($url, $filters), $title);
    return theme('pdf_icon', url($url, $filters), $title);
  }
}

/**
 * plugin that actually outputs a pdf file
 */
function theme_pdfview_views_pdf_output($view, $nodes, $type) {
  if ($type == 'block') {
    return;
  }
  global $base_url;

  $path = drupal_get_path('module', 'pdfview');
  require_once($path . '/tcpdf/tcpdf.php');
  require_once($path . '/tcpdf/config/tcpdf_config.php');
  $pdf = theme('pdfview_pdf');
  $pdf->SetTitle(check_plain(views_get_title($view, 'page')));

  // Except for the original being a while and this being a foreach, this is
  // completely cut & pasted from node.module.
  foreach ($nodes as $node) {
    // Load the specified node:
    $item = node_load($node->nid);
    $link = url("node/$node->nid", NULL, NULL, 1);

    // Filter and prepare node teaser
    if (node_hook($item, 'view')) {
      node_invoke($item, 'view', FALSE, FALSE);
    }
    else {
      $item = node_prepare($item, FALSE);
    }

    // Allow modules to change $node->teaser before viewing.
    node_invoke_nodeapi($item, 'view', FALSE, FALSE);

    $item_text = $item->body;
    $pdf = theme('pdfview_node', $pdf, $item);
  }

  pdfview_generate_file($pdf, check_plain(views_get_title($view, 'page')));
  module_invoke_all('exit');
  exit;
}

function theme_pdf_icon ($url, $title = NULL) {
  if ($title === NULL) {
    $title = t('Output as PDF');
  }
  $title = check_plain($title);
  $path = drupal_get_path('module', 'pdfview');
  if ($image = theme('image', $path .'/pdf.gif', $title, $title)) {
    return '<a href="'. check_url($url) .'" class="pdfview-pdf-icon" title="'. $title .'">'. $image. '</a>';
  }
}