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<?php
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// $Id:$
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if (module_exist('views')) {
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include_once('node_recommendation_views.inc');
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//drupal_set_message(t('really good'));
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}
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function node_recommendation_help($section) {
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switch ($section) {
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case 'admin/modules#description':
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return t("Provides blocks and an api to display Recommended Nodes");
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case 'admin/settings/node_recommendation':
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return t("These settings change the behaviors of the page view for recommendations");
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case 'recommendations':
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// Here is some help text for a custom page.
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return t(variable_get('node_recommendation_page_help_txt', 'These are your personal recommendations'));
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}
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}
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function node_recommendation_settings() {
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$form['node_recommendation_page_title'] = array(
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'#type' => 'textfield',
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'#title' => t('Recommeded Node page title'),
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'#description' => t('This sets the title displayed at the top of the recommendations page'),
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'#default_value' => variable_get('node_recommendation_page_title', 'Your recommendations'),
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);
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$form['node_recommendation_path_to_page'] = array(
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'#type' => 'textfield',
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'#title' => t('URL path to Recommendation Page'),
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'#description' => t('The path to the page itself. EXAMPLE: <i>recommendations</i> would result in a url ?q=recommendations or /recommendations for clean urls'),
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'#default_value' => variable_get('node_recommendation_path_to_page', 'recommendations'),
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);
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$form['node_recommendation_page_n'] = array(
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'#type' => 'textfield',
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'#title' => t('N-Value for page display'),
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'#description' => t('Max number of recommendations to display on the page'),
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'#size' => 3,
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'#default_value' => variable_get('node_recommendation_page_n', 20),
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);
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$form['node_recommendation_page_help_txt'] = array(
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'#type' => 'textfield',
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'#title' => t('Help Text'),
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'#description' => t('Help text displayed below the title. Set to " " if you dont want any text'),
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'#default_value' => variable_get('node_recommendation_page_help_txt', 'These are your personal recommendations'),
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);
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return $form;
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}
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/*
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* implementation of hook_block()
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*/
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function node_recommendation_block($op = 'list', $delta = 0, $edit = array()) {
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// get the user name and id
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global $user;
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$uid = $user->uid;
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$name = $user->name;
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// The $op parameter determines what piece of information is being requested.
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switch ($op) {
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case 'list':
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// If $op is "list", we just need to return a list of block descriptions.
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// This is used to provide a list of possible blocks to the administrator,
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// end users will not see these descriptions.
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$blocks[0]['info'] = t('General node Recomendation Engine block');
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$blocks[1]['info']= t('Similarly Rated Nodes');
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return $blocks;
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case 'configure':
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// If $op is "configure", we need to provide the administrator with a
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// configuration form. The $delta parameter tells us which block is being
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// configured. In this example, we'll allow the administrator to customize
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// the text of the first block.
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$form = array();
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if ($delta == 0) {
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// All we need to provide is a text field, Drupal will take care of
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// the other block configuration options and the save button.
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$form['node_recommendation_general_title'] = array(
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'#type' => 'textfield',
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'#title' => t('Title'),
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'#size' => 20,
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'#description' => t('This string will the title of the General Recommendation Block'),
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'#default_value' =>
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variable_get('node_recommendation_general_title', t('Recommended Nodes')),
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);
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// now add the value for n
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$form['n_value'] = array(
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'#type' => 'textfield',
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'#title' => t('Maximum number of nodes to recommend'),
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'#size' => 2,
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'#description' => t('This sets the max number of recommended nodes presented within the general block'),
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'#default_value' => variable_get('cre_n_value', 2)
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);
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}
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else if ($delta == 1)
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{
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$form['node_recommendation_similar_title'] = array(
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'#type' => 'textfield',
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'#title' => t('Title for the similar rated block'),
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'#size' => 20,
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'#description' => t('This sets the title for this block'),
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'#default_value' => variable_get('node_recommendation_similar_title', t('Similarly Rated Nodes')),
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);
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// n_value for this block
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$form['node_recommendation_similar_n_value'] = array(
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'#type' => 'textfield',
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'#title' => t('Maximum number of nodes to recommend'),
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'#size' => 2,
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'#description' => t('This sets the max number of nodes to recommend'),
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'#default_value' => variable_get('node_recommendation_similar_n_value', 4),
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);
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}
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return $form;
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case 'save':
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// If $op is "save", we need to save settings from the configuration form.
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// Since the first block is the only one that allows configuration, we
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// need to check $delta to make sure we only save it.
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if ($delta == 0) {
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// Have Drupal save the string to the database.
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variable_set('node_recommendation_general_title', $edit['node_recommendation_general_title']);
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variable_set('cre_n_value', $edit['n_value']);
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}
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else if ($delta == 1)
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{
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variable_set('node_recommendation_similar_title', $edit['node_recommendation_similar_title']);
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variable_set('node_recommendation_similar_n_value', $edit['node_recommendation_similar_n_value']);
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}
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return;
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case 'view': default:
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// If $op is "view", then we need to generate the block for display
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// purposes. The $delta parameter tells us which block is being requested.
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switch ($delta) {
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case 0:
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//Personalized recommendations
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$n=variable_get('cre_n_value',2);
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$content = node_recommendation_get_top_n($uid, $n);
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if ($content == NULL) {
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return;
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}
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$block['subject'] = t(variable_get('node_recommendation_general_title', t('Recommended Nodes')));
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$block['content'] = theme('item_list', $content );
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break;
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case 1: // call for the general similar block
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$n = variable_get('node_recommendation_similar_n_value', 3);
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$content = node_recommendation_get_similar($n);
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if ($content == NULL) {
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return;
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}
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$block['subject'] = t(variable_get('node_recommendation_similar_title', t('Those that like this also liked')));
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$block['content'] = theme('item_list', $content);
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break;
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}
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return $block;
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}
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}
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/*
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* implementation of node's hook_nodeapi()
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*/
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function node_recommendation_nodeapi(&$node, $op, $a3 = NULL, $a4 = NULL)
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{
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if($op == 'delete') {
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// remove all references in cre_similarity_matrix table where both $nid1 == &$node->nid and $nid2 == &$node->nid
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db_query("DELETE FROM {cre_similarity_matrix} WHERE nid1=%d OR nid2=%d",$node->nid,$node->nid);
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}
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}
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/*
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* Formats and prints the top n nodes
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*
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* @param $uid
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* uid for the personalized recommendations
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*
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* @param $n
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* specifies the number of recommendations to return
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*/
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function node_recommendation_get_top_n($uid,$n) {
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// do something special if user not logged in????
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if($uid == 0) {
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return;
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}
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//fetch nids
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$recommendations = cre_top($uid, $n);
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if ($recommendations == NULL) {
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drupal_set_message('ERROR: no recommendations for user: $uid');
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return;
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}
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foreach($recommendations as $nodeobj) {
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// format and return the html
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$node = db_fetch_object(db_query("SELECT title, nid FROM {node} WHERE nid=%d",$nodeobj->content_id));
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$return_value[]= l($node->title,"node/".$node->nid) /*." score = ".$nodeobj->score*/ ."<br>";
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}
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return $return_value;
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}
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/*
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* formats the nodes that were rated similar according to the currently
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* viewed node
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*
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* @param $n
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* Specifies the number of recommendatios to print
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*/
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function node_recommendation_get_similar($n) {
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if (arg(0) == 'node') {
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$nid = arg(1);
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if($nid <= 0) {
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// May want to do something here if it's not a node
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// highest rated nodes?
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return;
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}
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}
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else {
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return;
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}
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// now get the similar nodes
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$related_nodes = cre_similar($n,$nid,'node','vote');
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if ($related_nodes == NULL) {
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// no one has rated this node yet
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// therefore, there are no 'similars'
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// optionally display some msg (Be the first to rate this node something like that )
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return;
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}
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foreach($related_nodes as $recommended) {
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// format the output html
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$node = db_fetch_object(db_query("SELECT title, nid FROM {node} WHERE nid=%d",$recommended->content_id));
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$return_value[] = l($node->title, "node/".$node->nid);
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}
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return $return_value;
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}
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/**
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* Implementation of hook_perm().
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*
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* Since the access to our new custom pages will be granted based on
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* special permissions, we need to define what those permissions are here.
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* This ensures that they are available to enable on the user role
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* administration pages.
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*/
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function node_recommendation_perm() {
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return array('access recommendations');
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}
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/**
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* Implementation of hook_menu().
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*
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* You must implement hook_menu() to emit items to place in the main menu.
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* This is a required step for modules wishing to display their own pages,
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* because the process of creating the links also tells Drupal what
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* callback function to use for a given URL. The menu items returned
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* here provide this information to the menu system.
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*
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*/
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function node_recommendation_menu($may_cache) {
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$items = array();
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// The $may_cache parameter is used to divide menu items into two parts. Those
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// returned when $may_cache is true must be consistently applicable for the
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// current user at all times; the others may change or be defined at only
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// certain paths. Most modules will have excusively cacheable menu items.
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if ($may_cache) {
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// This is the minimum information you can provide for a menu item.
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$items[] = array('path' => variable_get('node_recommendation_path_to_page', 'recommendations'),
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'title' => t(variable_get('node_recommendation_page_title', 'Your recommendations')), // make a setting!
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'callback' => 'node_recommendation_recommendations',
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'access' => user_access('access recommendations'));
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}
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return $items;
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}
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/**
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* A simple page callback.
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*
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*
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*/
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function node_recommendation_recommendations() {
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global $user;
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$n = variable_get('node_recommendation_page_n', 20);
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if ($user->uid == 0) {
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// return top rated nodes
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drupal_set_message(t('good'));
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$top_nodes = _node_recommendation_get_top_rate_nodes();
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$count = 0;
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foreach($top_nodes as $node) {
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if ($count >= $n) {
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break;
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}
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$content[] = l($node->title, 'node/'.$node->nid);
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$count++;
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}
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}
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else {
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drupal_set_message(t('generating recommendations'));
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$content = node_recommendation_get_top_n($user->uid, $n);
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}
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drupal_set_message(t('???'));
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return theme('item_list', $content);
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}
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/*
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* gets the highest rated items
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*/
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function _node_recommendation_get_top_rate_nodes() {
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$sql = "SELECT c.content_id as nid, c.value as avg_vote, n.title
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FROM {votingapi_cache} c, {node} n
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WHERE c.content_id = n.nid AND c.function = 'average'
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ORDER BY avg_vote";
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$result = db_query($sql);
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while ($cached = db_fetch_object($result)) {
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$voting_results[] = $cached;
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}
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return $voting_results;
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}
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