<?php

function community_tags_views_tables() {    
    $tables['community_tags'] = array(
        'name' => 'community_tags',
        'provider' => 'internal',
        
        'join' => array(
            'left' => array(
                'table' => 'node',
                'field' => 'nid'
                ),
            'right' => array(
                'field' => 'nid'
                )
            ),
        'fields' => array(
            'tags' => array(
                'name' => t("Community Tags: Current user's tags"),
                'sortable' => false,
                'help' => t('This will display all taxonomy terms associated with the node by the current user. Note that this causes one extra query per row displayed, and might have a minor performance impact.'),
                'handler' => 'community_tags_handler_field_user_terms',
                'notafield' => true,
                'option' => array(
                     '#type' => 'select',
                     '#options' => array(
                       'weighted' => 'Weighted',
                       'notweighted' => 'Not weighted'
                      ),
                  ),
                ),
            ),
        );
    
    return $tables;
}

// adapted from views_taxonomy.inc
function community_tags_handler_field_user_terms($fieldinfo, $fielddata, $value, $data) {
    global $views_handler_arg_community_tags_uid; // FIXME
    if ($fielddata['options'] == 'weighted'){
        return theme('community_tags', 'user_node', $views_handler_arg_community_tags_uid, $data->nid);
    }
    else{
        $terms = community_tags_get_user_node_terms($views_handler_arg_community_tags_uid, $data->nid);
        $node->taxonomy = $terms;
        $links = taxonomy_link('taxonomy terms', $node);
        return theme('links', $links);
    }
}

// adapted from get_user_node_tags to return term arrays instead of just name
function community_tags_get_user_node_terms($uid, $nid) {
    $tags = array();
    $result = db_query("SELECT t.name, t.tid FROM {term_data} t INNER JOIN {community_tags} c ON c.tid = t.tid WHERE c.nid = %d AND c.uid = %d", $nid, $uid);
    while ($term = db_fetch_object($result)) {
        if (preg_match('/,/', $term->name) || preg_match('/"/', $term->name)) {
            $term->name = '"'.preg_replace('/"/', '""', $term->name).'"';
        }
        $tags[] = $term;
    }
    
    return $tags;
}

function community_tags_views_arguments() {
    $arguments = array(
        'community_tags_tagged' => array(
            'name' => t('Community Tags: UID has Tagged'),
            'handler' => 'views_handler_arg_community_tags_uid_tagged',
            'help' => t('The User ID argument allows users to filter for nodes tagged by the specified user ID.'),
            ),
        );
    return $arguments;
}

function views_handler_arg_community_tags_uid_tagged($op, &$query, $argtype, $arg = '') {
    switch($op) {
    case 'filter':
        $uid = intval($arg);
        
        global $views_handler_arg_community_tags_uid; // FIXME
        $views_handler_arg_community_tags_uid = $uid; // FIXME
        
        $table_data = _views_get_tables();
        $query->ensure_table('community_tags');
        $query->add_where("community_tags.uid = '%d'", $uid);
        break;
    }
}


?>