<?php
// $Id: versioncontrol_cvslog_compat.module,v 1.5 2009-06-01 13:08:21 jpetso Exp $
/**
 * @file
 * Compatibility layer to implement certain aspects of cvs.module on top of
 * Version Control API and its CVS backend.
 *
 * Copyright 2009 by Jakob Petsovits ("jpetso", http://drupal.org/user/56020)
 */

/**
 * Implementation of hook_menu().
 */
function versioncontrol_cvslog_compat_menu() {
  $items = array();
  $view_access = 'access commit messages';

  $items['cvs'] = array(
    'title' => 'CVS messages',
    'page callback' => 'versioncontrol_cvslog_compat_commitlog_page',
    'access arguments' => array($view_access),
    'type' => MENU_CALLBACK,
  );
  $items['cvs-application'] = array(
    'title' => 'CVS application form',
    'page callback' => 'versioncontrol_cvslog_compat_redirect',
    'page arguments' => array('versioncontrol/register'),
    'access arguments' => array($view_access),
    'type' => MENU_CALLBACK,
  );
  $items['project/developers/%'] = array( // old project* path
    'title' => 'Developers',
    'page callback' => 'versioncontrol_cvslog_compat_redirect',
    'page arguments' => array('node/!1/developers', 2),
    'type' => MENU_CALLBACK,
    'access callback' => TRUE,
  );
  $items['node/%/committers'] = array( // newer cvslog path
    'title' => 'Developers',
    'page callback' => 'versioncontrol_cvslog_compat_redirect',
    'page arguments' => array('node/!1/developers', 1),
    'type' => MENU_CALLBACK,
    'access callback' => TRUE,
  );
  return $items;
}

/**
 * Page callback for the 'cvs-application' menu path.
 */
function versioncontrol_cvslog_compat_redirect($path) {
  if (func_num_args() > 1) {
    $args = func_get_args();
    $replacements = array();
    for ($i = 1; $i < func_num_args(); $i++) { // starting from element #2
      $replacements['!' . $i] = $args[$i];
    }
    $path = strtr($path, $replacements);
  }
  drupal_goto($path, NULL, NULL, 301);
}

/**
 * Page callback for the 'cvs-application' menu path.
 */
function versioncontrol_cvslog_compat_commitlog_page() {
  $constraints = array('vcs' => array('cvs'));

  // Transform the query string into Version Control API constraints.
  if (is_numeric($_REQUEST['commit'])) {
    $constraints['vc_op_ids'] = array($_REQUEST['commit']);
  }
  if ($_REQUEST['user']) {
    $account = user_load($_REQUEST['user']);

    // There's no constraint for querying "either Drupal or VCS username"
    // currently, so let's fall back to the most reasonable switch.
    // (We can't have them both, as that would result in an "AND" operator.)
    if ($account) {
      $constraints['uids'] = array($_REQUEST['uid']);
    }
    else {
      $constraints['usernames'] = array($_REQUEST['user']);
    }
  }
  if (is_numeric($_REQUEST['uid'])) {
    $constraints['uids'] = array($_REQUEST['uid']);
  }
  if (is_numeric($_REQUEST['nid'])) {
    $constraints['nids'] = array($_REQUEST['nid']);
  }
  if ($_REQUEST['branch']) {
    $branch = strtoupper($_REQUEST['branch']) == 'HEAD' ? '' : $_REQUEST['branch'];
    $constraints['branches'] = array($branch);
  }
  if ($_REQUEST['file']) {
    $constraints['paths'] = array($_REQUEST['file']);
  }
  if (is_numeric($_REQUEST['rid'])) {
    $constraints['repo_ids'] = array($_REQUEST['rid']);
  }
  if ($_REQUEST['message']) {
    $constraints['message'] = array($_REQUEST['message']);
  }

  if (isset($_REQUEST['rss']) && $_REQUEST['rss']) {
    drupal_set_header('Content-Type: application/rss+xml; charset=utf-8');
    print theme('commitlog_rss', $constraints);
    exit();
  }

  // No RSS, return the regular HTML output.
  return commitlog_operations($constraints);
}