<?php
// $Id: project.module,v 1.355 2009-08-19 00:50:35 dww Exp $

/**
 * Implementation of hook_init().
 */
function project_init() {
  $path = drupal_get_path('module', 'project');
  drupal_add_css($path .'/project.css');
  if (file_exists("$path/project.inc")) {
    require_once "$path/project.inc";
  }
}

function project_help($path, $arg) {
  switch ($path) {
    case 'admin/project/project-settings':
      if (project_use_taxonomy()) {
        return _project_taxonomy_help();
      }
      break;
    case 'admin/content/taxonomy/%':
      $vid = _project_get_vid();
      if ($arg[3] == $vid) {
        return _project_taxonomy_help($vid, FALSE);
      }
      break;
  }
}

/**
 * Prints out a help message about how to configure the project vocabulary.
 *
 * @param $vid
 *   Vocabulary ID of the project taxonomy.
 * @param $vocab_link
 *   Boolean that controls if a link to the vocabulary admin page is added.
 */
function _project_taxonomy_help($vid = 0, $vocab_link = TRUE) {
  if (!$vid) {
    $vid = _project_get_vid();
  }
  $vocabulary = taxonomy_vocabulary_load($vid);
  $text = '<p>'. t('The project module makes special use of the taxonomy (category) system. A special vocabulary, %vocabulary_name, has been created automatically.', array('%vocabulary_name' => $vocabulary->name)) .'</p>';
  $text .= '<p>'. t('To take full advantage of project categorization, add at least two levels of terms to this vocabulary. The first level will be the basic project types, e.g., "Modules", "Themes", "Translations".') .'</p>';
  $text .= '<p>'. t('Subterms of each of these types will be the categories that users can select to classify the projects. For example, "Modules" might have sub-terms including "Mail" and "XML".') .'</p>';
  if ($vocab_link) {
    $text .= '<p>'. t('Use the <a href="@taxonomy-admin">vocabulary administration page</a> to view and add terms.', array('@taxonomy-admin' => url('admin/content/taxonomy/'. $vid))) .'</p>';
  }
  return $text;
}

/**
 * Implementation of hook_block().
 */
function project_block($op = 'list', $delta = 0, $edit = array()) {
  if ($op == 'list') {
    // Note:  We can get by with using BLOCK_CACHE_PER_ROLE below because
    // block caching is disabled when node access control modules are in use.
    $blocks['project_navigation_select'] = array(
      'info' => t('Project navigation (drop-down select)'),
      'cache' => BLOCK_CACHE_PER_ROLE,
    );
    $blocks['project_navigation_text'] = array(
      'info' => t('Project navigation (text field)'),
      'cache' => BLOCK_CACHE_PER_ROLE,
    );
    if (module_exists('search')) {
      $blocks['project_search'] = array(
        'info' => t('Project search'),
        'cache' => BLOCK_CACHE_PER_ROLE,
      );
    }

    module_load_include('inc', 'project', 'project');
    foreach (project_get_project_link_info() as $key => $links) {
      if (isset($links['type']) && $links['type'] == 'block') {
        $blocks[$key] = array(
          'info' => t('Project: @section', array('@section' => $links['name'])),
          'cache' => BLOCK_CACHE_PER_ROLE | BLOCK_CACHE_PER_PAGE,
        );
      }
    }

    return $blocks;
  }
  else if ($op == 'view') {
    switch ($delta) {
      case 'project_navigation_select':
        $block = array(
          'subject' => t('Project navigation'),
          'content' => drupal_get_form('project_quick_navigate_form'),
        );
        break;

      case 'project_navigation_text':
        $block = array(
          'subject' => t('Project navigation'),
          'content' => drupal_get_form('project_quick_navigate_title_form'),
        );
        break;

      case 'project_search':
        if (user_access('search content')) {
          $block = array(
            'subject' => t('Search projects'), 
            'content' => drupal_get_form('project_search_block_form', 'project_project'),
          );
        }
        break;

    }
    if (empty($block) && ($node = project_get_project_from_menu()) && node_access('view', $node)) {
      module_load_include('inc', 'project', 'project');
      foreach (project_get_project_link_info($node) as $key => $links) {
        if ($delta == $key && isset($links['type']) && $links['type'] == 'block' && !empty($links['links'])) {
          $block = array(
            'subject' => $links['name'],
            'content' => theme('item_list', $links['links']),
          );
        }
      }
    }
    return $block;
  }
  elseif ($op == 'configure' && $delta == 1) {
    $form = array();
    $form['help_text'] = array(
      '#type' => 'textfield',
      '#title' => t('Help text'),
      '#description' => t('Enter optional help text to display in the block.'),
      '#default_value' => variable_get('project_search_block_help_text', ''),
    );
    return $form;
  }
  elseif ($op == 'save' && $delta == 1) {
    variable_set('project_search_block_help_text', $edit['help_text']);
  }
}

function project_search_block_form($form_state, $node_type) {
  $form = search_box($form_state, 'project_search_block_form');
  $form['node_type'] = array(
    '#type' => 'value',
    '#value' => $node_type,
  );
  $form['#base'] = 'project_search_block_form';
  $help_text = variable_get('project_search_block_help_text', '');
  if (!empty($help_text)) {
     $element = 'project_search_block_form';
     $form[$element]['#description'] = check_plain($help_text);
  }
  $form['#submit'][] = 'project_search_block_form_submit';
  return $form;
}

function project_search_block_form_submit($form, &$form_state) {
  $form_state['redirect'] = 'search/node/type:'. $form_state['values']['node_type'] .' '. trim($form_state['values'][$form_state['values']['form_id']]);
}

function project_node_info() {
  return array(
    'project_project' => array(
      'name' => t('Project'),
      'module' => 'project_project',
      'description' => t('A project is something a group is working on. It can optionally have issue tracking, integration with revision control systems, releases, and so on.'),
    ),
  );
}

function project_perm() {
  $perms = array(
    'administer projects',
    'maintain projects',
    'access projects',
    'access own projects',
    'delete any projects',
    'delete own projects',
    'browse project listings',
  );
  return $perms;
}

/**
 * Implementation of hook_db_rewrite_sql().
 *
 * Both project (and, if enabled, project_issue) provide some permissions that
 * restrict access to viewing projects (and issues). For these permissions to
 * be globally honored by the system, db_rewrite_sql() has to check what
 * permissions the current user has and restrict query results accordingly.
 *
 * If a user has 'access projects' and 'access project issues', they have full
 * access, so there's nothing to re-write. If they have 'access own projects'
 * and/or 'access own project issues', the resulting query should JOIN on
 * {node} and ensure that the node type is not project_project or
 * project_issue, or that the owner of the node is the current user. If they
 * do not have any access to either, then we can just restrict the query based
 * on the {node}.type column.
 *
 * @see project_perm()
 * @see project_issue_perm()
 * @see project_find_alias()
 */
function project_db_rewrite_sql($query, $primary_table, $primary_field) {
  if ($primary_field == 'nid') {
    $return = array();
    $access_projects = user_access('access projects');
    $admin_projects = user_access('administer projects');
    if (module_exists('project_issue')) {
      $access_issues = user_access('access project issues');
      $access_own_issues = user_access('access own project issues');
    }
    else {
      $access_issues = TRUE;
      $access_own_issues = TRUE;
    }
    if ($admin_projects || ($access_projects && $access_issues)) {
      // User has full access, nothing to re-write.
      return;
    }
    else {
      // We have to make sure {node} is in the query and know the alias.
      if ($primary_table == 'n' || $primary_table == 'node') {
        // Great, it's the primary table and we already know the alias.
        $alias = $primary_table;
      }
      else {
        // Look for {node} in the query.
        if (!($alias = project_find_alias($query, 'node'))) {
          // Not already in the query, JOIN it.
          $return['join'] = "INNER JOIN {node} pn ON pn.nid = ". $primary_table .'.nid';
          $alias = 'pn';
        }
      }
    }
    // At this point, we know we have to restrict something, and we know what
    // the {node} table's alias is in the query.
    $where = array();

    global $user;
    $uid = $user->uid;

    // Some node types will be restriced by our query, but we want to allow
    // every other node type. We keep track of the types we're handling, and
    // at the end we'll add a clause to ignore/allow all other types.
    $restricted_types = array();

    if (!$access_projects) {
      $restricted_types[] = "'project_project'";
      if (user_access('access own projects')) {
        $where[] = "($alias.type = 'project_project' AND $alias.uid = $uid)";
      }
    }

    if (module_exists('project_issue') && !$access_issues) {
      $restricted_types[] = "'project_issue'";
      if ($access_own_issues) {
        $where[] = "($alias.type = 'project_issue' AND $alias.uid = $uid)";
      }
    }

    // If the type is not one of the restricted project* ones, allow access.
    $where[] = "($alias.type NOT IN (". implode(', ', $restricted_types) ."))";

    // Now that we have all our WHERE clauses, we just OR them all together.
    $return['where'] = implode(' OR ', $where);
    return $return;
  }
}

/**
 * Find the table alias for a table in a query.
 *
 * @param $query
 *   The query to examine for the alias.
 * @param
 *   $table The table to examine for the alias.
 * @return
 *   The alias if it exists, or the name of the table if it's present but not
 *   aliased, or FALSE if the table is not present.
 *
 * @see project_db_rewrite_sql()
 */
function project_find_alias($query, $table) {
  // See if {$table} is already in the query.
  $match = array();
  // This regexp handles many cases:
  // - {$table} can be either in FROM or in a JOIN clause
  // - Query might end immediately after {$table}
  // - Might not have a table alias for {$table}
  $pattern = "@.*(FROM|JOIN)\s+\{$table\}\s*(\S+)?@";
  if (preg_match($pattern, $query, $match)) {
    $keywords = '@(ON|INNER|LEFT|RIGHT|WHERE|ORDER|GROUP|HAVING|LIMIT)@';
    if (!isset($match[2]) || preg_match($keywords, $match[2])) {
      // No alias found, just use $table.
      $alias = $table;
    }
    else {
      // Alias found.
      $alias = $match[2];
    }
  }
  else {
    // Table not in query.
    $alias = FALSE;
  }

  return $alias;
}

/**
 * Callback for the main settings page.
 *
 * @TODO:  This function is probably one we can delete, since there are no settings
 * to be set anymore.
 */
function project_settings_form() {
  $form = array();

  if (module_exists('path')) {
    $form['project_enable_alias'] = array(
      '#type' => 'checkbox',
      '#title' => t('Enable auto-generated project aliases'),
      '#default_value' => variable_get('project_enable_alias', TRUE),
      '#description' => t('If checked, project module will automatically generate path aliases (eg. /project/&lt;shortname&gt;/) for each project. Uncheck if you want to use another module, such as pathauto, to generate aliases.')
    );
  }
  else {
    $form['project_enable_alias'] = array(
      '#type' => 'markup',
      '#value' => t('If you enable the Path module from Drupal core, you can control if the Project module will automatically generate path aliases (eg. /project/&lt;shortname&gt;/) for each project.')
    );
    variable_set('project_enable_alias', FALSE);
  }

  return system_settings_form($form);
}

/**
 * Returns the vocabulary id for projects.
 */
function _project_get_vid() {
  $vid = variable_get('project_vocabulary', '');
  if (empty($vid)) {
    // Check to see if a project module vocabulary exists.
    $vid = db_result(db_query("SELECT vid FROM {vocabulary} WHERE module='%s'", 'project'));
    if (!$vid) {
      $edit = array(
        'name' => t('Project types'),
        'multiple' => 1,
        'hierarchy' => 1,
        'relations' => 0,
        'module' => 'project',
        'nodes' => array('project_project' => 1),
      );
      // If there is already a vocabulary assigned to 'project_project' nodes, use it.
      $vocabularies = taxonomy_get_vocabularies('project_project');
      if (count($vocabularies)) {
        $vocabulary = reset($vocabularies);
        $edit['vid'] = $vocabulary->vid;
      }
      taxonomy_save_vocabulary($edit);
      $vid = $edit['vid'];
    }
    variable_set('project_vocabulary', $vid);
  }

  return $vid;
}

/**
 * Implementation of hook_term_path().
 *
 * @TODO:  Modify this function to use the new project settings where the
 * user selects the views to use.
 */
function project_term_path($term) {
  // Make sure we have the entire term object.
  $term = taxonomy_get_term($term->tid);

  // The path must include the first-level term name for this term.
  $tree = taxonomy_get_tree(_project_get_vid());
  $parents = taxonomy_get_parents_all($term->tid);
  foreach($parents as $parent) {
    $ancestors[] = $parent->tid;
  }
  foreach ($tree as $t) {
    if (in_array($t->tid, $ancestors) && $t->depth == 0) {
      $termname = $t->name;
      if ($term->name == $termname) {
        return 'project/' . drupal_strtolower($termname);
      }
      break;
    }
  }
  // TODO: when the project browsing views work, if there's a direct URL to
  // link to a project category view, we should add that here.
  // Also, note that in the project_solr case, we'd like to link to,
  // e.g. "project/modules?filter=tid:12" but it's apparently impossible to
  // return url() for this since things get double encoded or something.
  // So, for now, we punt and always link the subterms to the taxonomy page.
  return 'taxonomy/term/'. $term->tid;
}

/**
 * Implementation of hook_taxonomy().
 */
function project_taxonomy($op, $type, $array = NULL) {
  if ($op == 'delete' && $type == 'vocabulary' && $array['vid'] == _project_get_vid())  {
    variable_del('project_vocabulary');
  }
}

/**
 * Determine if the currently logged in user could have access to any project_project nodes.
 */
function project_project_access_any() {
  return user_access('access projects') || user_access('access own projects') || user_access('administer projects');
}

/**
 * Implement hook_menu().
 */
function project_menu() {
  $items = array();

  // @TODO: The project type and browsing views are currently set to require
  // 'access projects' permission.  However, we really want them to require at
  // least one of 'access projects', 'access own projects', or 'administer
  // projects'.  At this point I'm not sure what the best way to do this is,
  // but we need to figure this out to keep the same functionality.

  $items['project/autocomplete/project'] = array(
    'title' => 'Autocomplete project',
    'page callback' => 'project_autocomplete_project',
    'access callback' => 'project_project_access_any',
    'type' => MENU_CALLBACK,
  );

  $items['project/autocomplete/project-user/%'] = array(
    'title' => 'Autocomplete project',
    'page callback' => 'project_autocomplete_project_user',
    'page arguments' => array(3, 4),
    'access callback' => 'project_project_access_any',
    'type' => MENU_CALLBACK,
  );

  // CVS messages:
  $items['project/cvs'] = array(
    'title' => 'CVS',
    'page callback' => 'project_cvs',
    'access callback' => 'project_project_access_any',
    'type' => MENU_CALLBACK,
  );

  // Administration pages
  $items['admin/project'] = array(
    'title' => 'Project administration',
    'description' => 'Administrative interface for project management and related modules.',
    'page callback' => 'system_admin_menu_block_page',
    'access arguments' => array('administer projects'),
    'file' => 'system.admin.inc',
    'file path' => drupal_get_path('module', 'system'),
    'type' => MENU_NORMAL_ITEM,
  );
  $items['admin/project/project-settings'] = array(
    'title' => 'Project settings',
    'description' => 'Configure settings for the Project module.',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('project_settings_form'),
    'access arguments' => array('administer projects'),
    'type' => MENU_NORMAL_ITEM,
  );

  $items['node/%project_edit_project/edit/project'] = array(
    'title' => 'Project',
    'page callback' => 'node_page',
    'page arguments' => array(1),
    'access callback' => 'node_access',
    'access arguments' => array('update', 1), 
    'weight' => -5, 'type' => MENU_DEFAULT_LOCAL_TASK,
  );
  return $items;
}

/**
 * Menu loader callback to load a project node.
 *
 * @param $arg
 *   The menu argument to attempt to load a project from.  Can be either a
 *   numeric node ID (nid), or a string project short name (uri).
 *
 * @return
 *   The loaded node object if the argument was a valid project, FALSE if not.
 */
function project_node_load($arg) {
  if (is_numeric($arg)) {
    $nid = $arg;
  }
  else {
    $nid = db_result(db_query(db_rewrite_sql("SELECT p.nid FROM {project_projects} p WHERE p.uri = '%s'", 'p'), $arg));
  }
  $node = node_load($nid);
  if (!isset($node->type) || $node->type != 'project_project') {
    return FALSE;
  }
  return $node;
}

/**
 * Menu loader callback to load a project node if the edit tab needs subtabs.
 *
 * Load a project_project node if the given nid is a project_project node and
 * if the user has permission to edit the project and if either the
 * project_issue or project_release module exists.
 */
function project_edit_project_load($nid) {
  if (!module_exists('project_issue') && !module_exists('project_release')) {
    return FALSE;
  }
  return project_node_load($nid);
}

function project_check_admin_access($project, $cvs_access = NULL) {
  global $user;
  if (empty($user->uid)) {
    return FALSE;
  }

  $project_obj = is_numeric($project) ? node_load($project) : $project;
  if (!isset($project_obj) || (isset($project_obj->type) && $project_obj->type != 'project_project')) {
    return FALSE;
  }

  if (user_access('administer projects')) {
     return TRUE;
  }

  // If $cvs_access is not defined, check to make sure the user has cvs access
  // and that the user's cvs account is approved.
  if (project_use_cvs($project_obj) && !isset($cvs_access)) {
    if (db_result(db_query("SELECT COUNT(*) FROM {cvs_accounts} WHERE uid = %d AND status = %d", $user->uid, CVS_APPROVED))) {
      $cvs_access = TRUE;
    }
    else {
      $cvs_access = FALSE;
    }
  }

  if (user_access('maintain projects')) {
    if ($user->uid == $project_obj->uid) {
       return TRUE;
    }
    if (project_use_cvs($project_obj) && $cvs_access) {
      if (db_result(db_query("SELECT COUNT(*) FROM {cvs_project_maintainers} WHERE uid = %d AND nid = %d", $user->uid, $project_obj->nid))) {
        return TRUE;
      }
    }
  }
  return FALSE;
}

/**
 * Implementation of form_alter. This removes the work of
 * taxonomy.module's form_alter() so we can do our own taxonomy
 * selection.
 */
function project_form_alter(&$form, &$form_state, $form_id) {
  switch ($form_id) {
    case 'project_project_node_form':
      $vid = _project_get_vid();
      if (isset($form['taxonomy'][$vid])) {
        unset($form['taxonomy'][$vid]);
      }
      // If there are no children elements, we should unset the entire
      // thing so we don't end up with an empty fieldset.
      if (!empty($form['taxonomy']) && (!element_children($form['taxonomy']))) {
        unset($form['taxonomy']);
      }
  
      // In D6, FAPI changed in such a way that completely unsetting
      // $form['taxonomy'] causes warnings and errors when the project node is
      // previewed. In order to prevent these problems, we need to add a
      // submit handler to the preview button, and this handler needs to put
      // the taxonomy terms back into $node->taxonomy like they would be if
      // project wasn't replacing the usual taxonomy selection form elements
      // with its own elements.
      if (isset($form['buttons']['preview'])) {
        $form['buttons']['preview']['#submit'][] = 'project_project_form_preview_submit';
      }
  
      // If the form has an element for specifying a URL alias, we want
      // to alter it, since we're just going to automatically override
      // the specified value.
      if (variable_get('project_enable_alias', TRUE) && isset($form['path'])) {
        $url_alias = $form['path']['path']['#default_value'];
        if (empty($url_alias)) {
          unset($form['path']);
        }
        else {
          unset($form['path']['path']);
          $form['path']['value'] = array(
            '#prefix' => '<div>',
            '#value' => t('Automatically generated path alias: %url', array('%url' => $url_alias)),
            '#suffix' => '</div>',
          );
        }
      }
      break;
  
    case 'taxonomy_form_vocabulary':
      // Add a validate handler to the vocabulary form if the
      // Project type vocabulary term is being edited so that its
      // possible to detect if this vocabulary was set to be
      // a free tagging vocabulary, and if so then throw an error.
      $project_type_vid = _project_get_vid();
      if (isset($project_type_vid) && $form['vid']['#value'] == $project_type_vid) {
        $form['#validate'][] = 'project_project_type_vocabulary_validate';
        
      }
      break;
  }
}

/**
 * Implement hook_access().
 */
function project_project_access($op, $node, $account) {
  switch ($op) {
    case 'view':
      // Since this function is shared for project_release nodes, we have to
      // be careful what node we pass to project_check_admin_access().
      if ($node->type == 'project_release') {
        $node = node_load($node->project_release['pid']);
      }
      if (project_check_admin_access($node)) {
        return TRUE;
      }
      if (!user_access('access projects')) {
         return FALSE;
      }
      break;
    case 'create':
      if ($account->uid && user_access('maintain projects')) {
        // Since this CVS access checking is non-standard, we need to
        // special-case uid 1 to always allow everything.
        if ($account->uid != 1 && module_exists('cvs') && variable_get('cvs_restrict_project_creation', 1)) {
          return db_result(db_query("SELECT uid FROM {cvs_accounts} WHERE uid = %d AND status = %d", $account->uid, CVS_APPROVED)) ? TRUE : FALSE;
        }
        else {
          return TRUE;
        }
      }
      break;
    case 'update':
      if (project_check_admin_access($node)) {
        return TRUE;
      }
      break;
    case 'delete':
      if (user_access('delete any projects', $account) || (user_access('delete own projects', $account) && ($account->uid == $node->uid))) {
        return TRUE;
      }
      break;
  }
}

/**
 * Implement hook_load().
 */
function project_project_load($node) {
  $additions = db_fetch_array(db_query('SELECT * FROM {project_projects} WHERE nid = %d', $node->nid));
  $project = new stdClass;
  $project->project = $additions;
  return $project;
}

/**
 * hook_nodeapi() implementation. This just decides what type of node
 * is being passed, and calls the appropriate type-specific hook.
 *
 * @see project_project_nodeapi().
 */
function project_nodeapi(&$node, $op, $arg) {
  switch ($node->type) {
    case 'project_project':
      module_load_include('inc', 'project', 'project');
      project_project_nodeapi($node, $op, $arg);
      break;
  }
}

/**
 * Build a SQL statment from a structured array.
 *
 * @param $sql_elements
 *   An array with the following keys:
 *     'fields', 'from', 'joins', 'wheres', 'group_bys', 'order_bys',
 *     'parameters'
 *   Each value is an array with the following keys:
 *     'prefix', 'glue', 'pieces'
 * @return
 *   SQL string.
 *
 * @TODO This should move to project_usage.module
 */
function project_build_query($sql_elements) {
  $sql = '';
  foreach ($sql_elements as $key => $sql_element) {
    if ($key != 'parameters' && count($sql_element['pieces'])) {
      $sql .= $sql_element['prefix'] . implode($sql_element['glue'], $sql_element['pieces']);
    }
  }
  return db_rewrite_sql($sql);
}

/**
 * Construct an empty query for project_build_query().
 *
 * Set the default elements that will be used to construct the SQL statement.
 *
 * @TODO This should move to project_usage.module
 */
function project_empty_query() {
  return array(
    'fields' => array(
      'prefix' => 'SELECT ',
      'glue' => ', ',
      'pieces' => array(),
    ),
    'from' => array(
      'prefix' => ' FROM ',
      'glue' => NULL,
      'pieces' => array(''),
    ),
    'joins' => array(
      'prefix' => '',
      'glue' => ' ',
      'pieces' => array(),
    ),
    'wheres' => array(
      'prefix' => ' WHERE ',
      'glue' => ' AND ',
      'pieces' => array(),
    ),
    'group_bys' => array(
      'prefix' => ' GROUP BY ',
      'glue' => ', ',
      'pieces' => array(),
    ),
    'order_bys' => array(
      'prefix' => ' ORDER BY ',
      'glue' => ', ',
      'pieces' => array(),
    ),
    'parameters' => array(
      'prefix' => NULL,
      'glue' => NULL,
      'pieces' => array(),
    )
  );
}

/**
 * Helper function for grouping nodes by date.
 */
function _project_date($timestamp) {
  static $last;
  $date = format_date($timestamp, 'custom', 'F j, Y');
  if ($date != $last) {
    $last = $date;
    return $date;
  }
}

/**
 * Returns an array of all projects on the system for use with select
 * form elements. The keys are the project nid, and the values are
 * the project names. If the project taxonomy is in use, the array
 * will be sorted into the project categories with appropriate headers
 * for each term.
 *
 * @param $project_urls
 *   Reference to be filled with an array of project uri => id mappings. This
 *   array is used by the project_issue search form code.
 * @param $issues
 *   If TRUE, only projects with issue tracking  enabled are returned.
 *   For this option to do much good, the project_issue.module should be
 *   enabled.
 * @param $key_prefix
 *   Prefix to prepend to all keys in the returned array.
 */
function project_projects_select_options(&$project_urls, $issues = TRUE, $key_prefix = NULL) {
  $projects = array();
  $ISSUE_JOIN = '';
  $ISSUE_WHERE = '';
  $args_use_taxonomy = array(1, 0);    // n.status, h.parent
  $args_no_taxonomy = array(1);        // n.status
  if ($issues && module_exists('project_issue')) {
    $ISSUE_JOIN ='INNER JOIN {project_issue_projects} pip ON n.nid = pip.nid';
    $ISSUE_WHERE = 'AND pip.issues = %d';
    $args_use_taxonomy[] = 1;
    $args_no_taxonomy[] = 1;
  }
  if (project_use_taxonomy()) {
    $vid = _project_get_vid();
    $args_use_taxonomy[] = $vid;
    $result = db_query(db_rewrite_sql("SELECT n.nid, n.title, d.name, p.uri FROM {project_projects} p INNER JOIN {node} n ON n.nid = p.nid $ISSUE_JOIN LEFT JOIN {term_node} t ON t.vid = n.vid INNER JOIN {term_data} d ON t.tid = d.tid INNER JOIN {term_hierarchy} h ON t.tid = h.tid WHERE n.status = %d AND h.parent = %d $ISSUE_WHERE AND d.vid = %d GROUP BY n.nid, n.title, d.name, p.uri, d.weight ORDER BY d.weight, n.title"), $args_use_taxonomy);
    while ($project = db_fetch_object($result)) {
      if (isset($project->name)) {
        if (!isset($projects[$project->name])) {
          $projects[$project->name] = array();
        }
        $projects[$project->name][$key_prefix . $project->nid] = $project->title;
      }
      else {
        $projects[$key_prefix . $project->nid] = $project->title;
      }
      if (is_array($project_urls)) {
        $project_urls[$project->uri] = $project->nid;
      }
    }
  }
  else {
   $result = db_query(db_rewrite_sql("SELECT n.nid, p.uri, n.title FROM {project_projects} p INNER JOIN {node} n ON n.nid = p.nid $ISSUE_JOIN WHERE n.status = %d $ISSUE_WHERE ORDER BY n.title"), $args_no_taxonomy);
    while ($project = db_fetch_object($result)) {
      $projects[$key_prefix . $project->nid] = $project->title;
      if (is_array($project_urls)) {
        $project_urls[$project->uri] = $project->nid;
      }
    }
  }
  return $projects;
}

function project_quick_navigate_form() {
  $uris = NULL;
  $projects = array(t('- Select a project -')) + project_projects_select_options($uris, FALSE);
  $form = array();
  $form['project_goto'] = array(
    '#type' => 'select',
    '#default_value' => '0',
    '#options' => $projects,
    '#attributes' => array('title' => t('Select a project to view')),
  );
  $form['project'] = array(
    '#type' => 'submit',
    '#value' => t('View project'),
    '#submit' => array('project_quick_navigate_project_submit'),
  );
  return $form;
}

function project_quick_navigate_form_validate($form, $form_state) {
  if (empty($form_state['values']['project_goto'])) {
    form_set_error('project_goto', t('You must select a project to navigate to.'));
  }
}

function project_quick_navigate_project_submit($form, &$form_state) {
  $form_state['redirect'] = 'node/'. $form_state['values']['project_goto'];
}
 
function project_quick_navigate_title_form() {
  $form = array();
  $form['project_title'] = array(
    '#title' => t('Project name'),
    '#type' => 'textfield',
    '#size' => 20,
    '#autocomplete_path' => 'project/autocomplete/project',
  );
  $form['project'] = array(
    '#type' => 'submit',
    '#value' => t('View project'),
    '#validate' => array('project_quick_navigate_title_project_validate'),
    '#submit' => array('project_quick_navigate_title_project_submit'),
  );
  return $form;
}

function project_quick_navigate_title_project_validate($form, &$form_state) {
  if (empty($form_state['values']['project_title'])) {
    form_set_error('project_title', t('You must enter a project to navigate to.'));
  }
  else {
    $nid = db_result(db_query("SELECT nid FROM {node} WHERE title = '%s' AND type = '%s'", $form_state['values']['project_title'], 'project_project'));
    if (empty($nid)) {
      form_set_error('project_title', t('The name you entered (%title) is not a valid project.', array('%title' => $form_state['values']['project_title'])));
    }
    else {
      $form_state['nid'] = $nid;
    }
  }
}

function project_quick_navigate_title_project_submit($form, &$form_state) {
  $form_state['redirect'] = 'node/'. $form_state['nid'];
}
 

/**
 * Implementation of hook_views_api().
 */
function project_views_api() {
  return array(
    'api' => 2,
    'path' => drupal_get_path('module', 'project') .'/views',
  );
}

// Themables

/**
 * Implementation of hook_theme().
 */
function project_theme() {
  return array(
    'project_term_list' => array(
      'arguments' => array(
        'terms' => NULL,
        'path' => NULL,
      ),
    ),
    'project_summary' => array(
      'arguments' => array(
        'project' => NULL,
      ),
    ),
    'project_feed_icon' => array(
      'arguments' => array(
        'url' => NULL,
        'title' => NULL,
      ),
    ),
    'project_project_node_form_taxonomy' => array(
      'file' => 'project.inc',
      'arguments' => array(
        'form' => NULL,
      ),
    ),
    'project_views_project_sort_method_options_form' => array(
      'file' => 'theme.inc',
      'path' => drupal_get_path('module', 'project') .'/views/theme',
      'arguments' => array(
        'form' => NULL,
      ),
    ),
    'project_type' => array(
      'arguments' => array(
        'term' => NULL,
      ),
    ),
    'project_type_description' => array(
      'arguments' => array(
        'term' => NULL,
      ),
    ),
  );
}

function theme_project_term_list($terms, $path) {
  $depth = 0;
  $output = "\n<ul class=\"project-terms\">\n";
  foreach ($terms as $term) {
    if (!empty($term->description)){
      $description = strip_tags($term->description);
    }
    else {
      $description = '';
    }
    $link = l($term->name .' ('. $term->count .')', "$path/$term->tid", array('attributes' => array('title' => $description)));
    $output .= '<li class="leaf">' . $link . "</li>\n";
  }
  $output .= "\n</ul>\n";
  return $output;
}

/**
 * Theme a compact project view/summary.
 *
 * $project has the following fields:
 * - title: Title
 * - nid: Node id
 * - body: Filtered description
 * - term: String with the selected term name
 * - version: String with the version
 * - links: Array of links
 */
function theme_project_summary($project) {
  $output = '<div class="' . $project->class . '">';
  $output .= '<h2>'. l($project->title, "node/$project->nid") .'</h2>';
  if (!empty($project->changed)) {
    $output .= '<p><small>' . t('Last changed: !interval ago', array('!interval' => format_interval(time() - $project->changed, 2))) . '</small></p>';
  }
  $output .= $project->body;
  if (!empty($project->download_table)) {
    $output .= $project->download_table;
  }
  if (!empty($project->links)) {
    $output .= theme('links', $project->links);
  }
  if (!empty($project->terms)) {
    $output .= theme('links', $project->terms);
  }
  $output .= '</div>';
  return $output;
}

/**
 * Display an RSS feed icon for use on project nodes.
 */
function theme_project_feed_icon($url, $title) {
  if ($icon = theme('image', 'misc/feed.png', $title, $title)) {
    return '<a href="'. check_url($url) .'" class="project-feed-icon">'. $icon .'</a>';
  }
}

/**
 * Return a string of valid project names for use with JS autocomplete fields.
 */
function project_autocomplete_project($string = '') {
  $matches = array();

  // The user enters a comma-separated list of projects. We only autocomplete
  // the last one.
  $array = drupal_explode_tags($string);
  $last_string = trim(array_pop($array));

  if ($last_string != '') {
    $result = db_query_range(db_rewrite_sql("SELECT n.title FROM {node} n WHERE n.status = %d AND n.type = '%s' AND LOWER(n.title) LIKE LOWER('%%%s%%')"), 1, 'project_project', $last_string, 0, 10);

    $prefix = count($array) ? implode(', ', $array) .', ' : '';
    while ($project = db_fetch_object($result)) {
      $title = $project->title;
      // Commas and quotes in terms are special cases, so encode 'em.
      if (strpos($title, ',') !== FALSE || strpos($title, '"') !== FALSE) {
        $title = '"'. str_replace('"', '""', $project->title) .'"';
      }
      $matches[$prefix . $title] = check_plain($project->title);
    }
  }

  drupal_json($matches);
}


/**
 * Return a string of valid project names owned by a given user.
 */
function project_autocomplete_project_user($uid, $string = '') {
  $matches = array();

  // The user enters a comma-separated list of projects. We only autocomplete
  // the last one.
  $array = drupal_explode_tags($string);
  $last_string = trim(array_pop($array));

  if ($last_string != '') {
    $result = db_query_range(db_rewrite_sql("SELECT n.title FROM {node} n WHERE n.status = %d AND n.type = '%s' AND n.uid = %d AND LOWER(n.title) LIKE LOWER('%%%s%%')"), 1, 'project_project', $uid, $last_string, 0, 10);

    $prefix = count($array) ? implode(', ', $array) .', ' : '';
    while ($project = db_fetch_object($result)) {
      $title = $project->title;
      // Commas and quotes in terms are special cases, so encode 'em.
      if (strpos($title, ',') !== FALSE || strpos($title, '"') !== FALSE) {
        $title = '"'. str_replace('"', '""', $project->title) .'"';
      }
      $matches[$prefix . $title] = check_plain($project->title);
    }
  }

  drupal_json($matches);
}

/**
 * Returns whether or not the project module should use
 * taxonomy-specific functionality.
 */
function project_use_taxonomy() {
  return module_exists('taxonomy') && taxonomy_get_tree(_project_get_vid());
}

/**
 * Returns whether or not the project uses version control or not.
 */
function project_use_cvs($project) {
  if (module_exists('cvs')) {
    $project = is_numeric($project) ? node_load($project) : $project;
    return !empty($project->cvs['repository']);
  }
}

/**
 * Determines if the current site supports caching of project-related pages.
 *
 * The pages can be cached if:
 *   1. Anonymous users have the 'access projects' permission.
 *   2. No node access modules are installed.
 *
 * @return TRUE if the output can be cached, FALSE otherwise.
 */
function project_can_cache() {
  $grants = module_implements('node_grants');
  if (!empty($grants)) {
    return FALSE;
  }
  $allowed_roles = user_roles(FALSE, 'access projects');
  if (!isset($allowed_roles[DRUPAL_ANONYMOUS_RID])) {
    return FALSE;
  }

  return TRUE;
}

/**
 * Intelligently merge project type terms selected by the
 * user back into $node->taxonomy during a node preview.
 */
function project_project_form_preview_submit($form, &$form_state) {
  $project_type_vid = _project_get_vid();
  if (isset($project_type_vid) && isset($form_state['values']['project_type'])) {
    $project_type_tid = $form_state['values']['project_type'];
    $project_type_tid_field = 'tid_' . $project_type_tid;
    $project_type_terms = array();
    $project_type_terms[$project_type_tid] = $project_type_tid;
    if (isset($form_state['values']->$project_type_tid_field)) {
      foreach ($form_state['values'][$project_type_tid_field] as $tid) {
        $project_type_terms[$tid] = $tid;
      }
    }
    $form_state['node']['taxonomy'][$project_type_vid] = $project_type_terms;
  }
}

/**
 * Present a validation error if the user tries to make the
 * Project types vocabulary a free tagging vocabulary.
 */
function project_project_type_vocabulary_validate($form, &$form_state) {
  if (!empty($form_state['values']['tags'])) {
    form_set_error('tags', t('The %name vocabulary does not support tags.', array('%name' => $form_state['values']['name'])));
  }
}

/**
 * Theme a project type item.
 */
function theme_project_type($term) {
  $link = l($term->name, check_url('project/'. drupal_strtolower($term->name)));
  $link = str_replace('%20', '+', $link);
  $output = "<div>$link</div>\n";
  if ($term->description) {
    $output .= '<p>' . filter_xss($term->description) . '</p>';
  }
  return $output;
}

/**
 * Theme a project type description.
 */
function theme_project_type_description($term) {
  $output = '';
  if ($term->description) {
    $output .= '<p>' . filter_xss($term->description) . '</p>';
  }
  return $output;
}


/**
 * Find a project node ID (nid) based on project short name (uri).
 *
 * @param $uri
 *   The project shortname (uri) to search for.
 *
 * @return
 *   The project node ID (nid) of the given project, or NULL if not found.
 */
function project_get_nid_from_uri($uri) {
  static $nids = array();
  if (!isset($nids[$uri])) {
    $nids[$uri] = db_result(db_query_range("SELECT nid FROM {project_projects} WHERE uri = '%s'", $uri, 0, 1));
  }
  return $nids[$uri];
}

/**
 * Find a project shortname (uri) based on project node ID (nid).
 *
 * @param $uri
 *   The project node ID (nid) to search for.
 *
 * @return
 *   The project shortname (uri) of the given project, or NULL if not found.
 */
function project_get_uri_from_nid($nid) {
  static $uris = array();
  if (!isset($uris[$nid])) {
    $uris[$nid] = db_result(db_query_range("SELECT uri FROM {project_projects} WHERE nid = %d", $nid, 0, 1));
  }
  return $uris[$nid];
}

/**
 * Get the project node context from the currently active menu, if any.
 *
 * @return
 *   A fully loaded project $node object if the currently active menu has a
 *   project node context, or NULL if the menu isn't pointing to a project.
 */
function project_get_project_from_menu() {
  if (($node = menu_get_object('project_node')) ||
      (($node = menu_get_object()) && $node->type == 'project_project')) {
    return $node;
  }
}

/**
 * Implement hook_token_list() (from token.module)
 */
function project_token_list($type) {
  if ($type == 'node') {
    $tokens['node'] = array(
      'project_shortname' => t("A project's short name"),
      'project_homepage' => t("Link to a project's home page"),
      'project_changelog' => t("Link to a project's changelog"),
      'project_cvs' => t("Link to a project's cvs tree"),
      'project_demo' => t('Demonstration link for a project'),
      'project_documentation' => t("Link to a project's documentation"),
      'project_screenshots' => t("Link to a project's screenshots"),
      'project_license' => t("Link to a project's license"),
    );
    return $tokens;
  }
}
 
/**
 * Implement hook_token_values() (from token.module)
 */
function project_token_values($type = 'all', $object = NULL) {
  if ($type == 'node') {
    if ($object->type == 'project_project') {
      $values['project_shortname'] = check_plain($object->project['uri']);
      $values['project_homepage'] = check_url($object->project['homepage']);
      $values['project_changelog'] = check_url($object->project['changelog']);
      $values['project_cvs'] = check_url($object->project['cvs']);
      $values['project_demo'] = check_url($object->project['demo']);
      $values['project_documentation'] = check_url($object->project['documentation']);
      $values['project_screenshots'] = check_url($object->project['screenshots']);
      $values['project_license'] = check_url($object->project['license']);
    }
    else {
      $values['project_shortname'] = '';
      $values['project_homepage'] = '';
      $values['project_changelog'] = '';
      $values['project_cvs'] = '';
      $values['project_demo'] = '';
      $values['project_documentation'] = '';
      $values['project_screenshots'] = '';
      $values['project_license'] = '';
    }
    return $values;
  }
}