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<?php
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// $Id:$
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function creTest_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/votingapi':
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return t("Provides several different ways to display Recommended Nodes to users");
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}
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}
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function creTest_build($userID,$itemID)
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{
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// switch globals on database type!!!
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// Run my magik! put the values in dev table
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$db_result = db_query("SELECT DISTINCT r.content_id, r2.value-r.value as rating_difference
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FROM {votingapi_vote r}, {votingapi_vote r2}
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WHERE r.uid=%d AND r2.content_id=%d AND r2.uid=r.uid", $userID, $itemID);
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if(!$db_result)
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{
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drupal_set_message(t('ERROR $userID, $itemID'));
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}
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else
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{
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while($row = db_fetch_array($db_result))
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{
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$other_node=$row["content_id"];
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$rating_difference=$row["rating_difference"];
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// check to see if the pair of content ($itemID and $other_node) are already in the dev table
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if(db_num_rows(db_query("SELECT nid1 from {dev} WHERE nid1=%d AND nid2=%d",$itemID,$other_node)) > 0)
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{
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//update the two rows
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//drupal_set_message(t('updated!'));
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db_query("UPDATE {dev} SET count=count+1, sum=sum+%d
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WHERE nid1=%d AND nid2=%d", $rating_difference, $itemID, $other_node);
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// update the second row ONLY if the two nodes are different
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if($itemID != $other_node)
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{
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db_query("UPDATE {dev} SET count=count+1, sum=sum-%d
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WHERE nid1=%d AND nid2=%d", $rating_difference, $other_node, $itemID);
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}
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}
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// if this is a new 'pairing' creTestate two rows
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else
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{
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// insert 2 rows only if the nodes are different
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$insertSQL = "INSERT INTO {dev} VALUES ($itemID, $other_node, 1, $rating_difference)";
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db_query("INSERT INTO {dev} VALUES (%d,%d, 1, %d)",$itemID,$other_node,$rating_difference);
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if($itemID != $other_node)
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{
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$sql="INSERT INTO dev VALUES($other_node, $itemID,1,-$rating_difference)";
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db_query("INSERT INTO dev VALUES(%d, %d,1,%d)",$other_node,$itemID,-$rating_difference);
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}
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}
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}
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}
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}
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function creTest_top_n($uid, $n, $type = NULL, $cat = NULL)
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{
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// do something special if user not logged in????
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if($uid == 0)
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{
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return;
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}
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if(isset($type))
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{
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//drupal_set_message(t('Type is set to ' . $type));
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// instead use type to specify vote type? BUT THEN CANT REFERENCE {node}!!!
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$db_result = db_query("SELECT d.nid1 as 'node', sum(d.sum+d.count*r.value)/sum(d.count) as 'score', n.title
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FROM {votingapi_vote r}, {dev d}, {node n}
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WHERE r.uid=%d AND d.nid1<>r.content_id AND d.nid2=r.content_id AND n.nid=d.nid1 AND n.type='%s'
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GROUP BY d.nid1 ORDER BY score DESC",$uid,$type);
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}
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else
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{
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$db_result = db_query("SELECT d.nid1 as 'node', sum(d.sum+d.count*r.value)/sum(d.count) as 'score', n.title
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FROM {votingapi_vote r}, {dev d}, {node n}
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WHERE r.uid=%d AND d.nid1<>r.content_id AND d.nid2=r.content_id AND n.nid=d.nid1
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GROUP BY d.nid1 ORDER BY score DESC",$uid);
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}
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$basicSQL = db_query("SELECT sum(value) as 'sum', sum(uid / %d) as 'count'
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FROM {votingapi_vote}
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WHERE uid=%d", $uid,$uid);
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$sqlObj = db_fetch_object($basicSQL);
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$avg = $sqlObj->sum / $sqlObj->count;
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$count = 0;
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$nodeObj = db_fetch_object($db_result);
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while($nodeObj != NULL)
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{
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if($count >= $n)
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{
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break;
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}
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// do a check to see if the node was rated by the uid
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// replace with votingapi_get_user_votes($content_type,$content_id,$uid)
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$nid = $nodeObj->node;
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$user_check_result = db_query("SELECT uid, content_id
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FROM {votingapi_vote}
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WHERE uid = %d AND content_id = %d", $uid,$nid);
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if(db_num_rows($user_check_result) == 0)
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{
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$return_value.= l($nodeObj->title,"node/".$nodeObj->node) /*." score = ".$nodeObj->score*/ ."<br>";
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$count++;
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}
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$nodeObj = db_fetch_object($db_result);
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}
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if(isset($return_value))
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{
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return $return_value . "avg = $avg";
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}
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else
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{
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// do something special when user has rated all nodes
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// return top rated nodes?
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//return "No nodes";
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}
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}
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function creTest_similar($n)
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{
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$nid = arg(1);
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if($nid <= 0)
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{
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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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$sql_result = db_query("SELECT d.nid2 as 'node', (d.sum / d.count) AS 'average', n.title
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FROM {dev d}, {node n}
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WHERE nid1=%d AND n.nid=d.nid2 AND n.nid <> %d
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ORDER BY (sum/count) DESC LIMIT %d",$nid,$nid,$n);
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while($node = db_fetch_object($sql_result))
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{
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$return_value .= l($node->title, "node/".$node->node) . "<br>";
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}
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return $return_value;
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}
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function creTest_votingapi_insert(&$vote)
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{
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// run my magik!
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// $vote obj has all the fields for a vote record! extract uid, nid
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creTest_build($vote->uid,$vote->content_id);
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//drupal_set_message(t('function Called'));
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return;
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}
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function creTest_votingapi_update(&$vote)
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{
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// when a vote is updated need to just adjust sum NOT COUNT!!
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// for all records in dev where nid1 or nid2 equals vote->content_id
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// and the adjustment to sum MUST BE THE RATING_DIFFERENCE
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}
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function creTest_votingapi_delete(&$vote)
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{
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// TODO: modifiy the dev table by subratcting from count
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// and subtracting vote value from sum
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// OVER ALL REFERENCES TO THE CONTENT_ID
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// THINK !!! reverse of build!!
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}
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function creTest_block($op = 'list', $delta = 0, $edit = array()) {
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// LOCAL VARIABLES!! FIX THIS TO THE ACTUAL USER AND n
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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 Content Recomendation Engine block');
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$blocks[1]['info'] = t('Recommended nodes of a given type');
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$blocks[2]['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['creTest_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('creTest_general_title', t('Recommended Nodes')),
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);
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// now add the value for n
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$form['n_value'] = array(
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'#type' => 'textfield',
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'#title' => t('Maximum number of nodes to recommend'),
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'#size' => 2,
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'#description' => t('This sets the max number of recommended nodes presented within the general block'),
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'#default_value' => 2,
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);
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}
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else if ($delta == 1)
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{
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$form['creTest_type_title'] = array(
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'#type' => 'textfield',
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'#title' => t('Title of the block'),
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'#size' => 20,
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'#description' => t('This is the title of the type block. Type applies to node types...not vocab'),
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'#default_value' => variable_get('creTest_type_title', 'Other Recomendations'),
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);
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// this is the type of node
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$form['creTest_type_type'] = array(
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'#type' => 'textfield',
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'#title' => t('Node type to recommend'),
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'#size' => 20,
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'#description' => t('This is the type of nodes to recommend within this block'),
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'#default_value' => variable_get('creTest_type_type','story'),
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);
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$form['creTest_type_n_value'] = array(
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'#type' => 'textfield',
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'#title' => t('Maximum number of nodes to recommend'),
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'#size' => 2,
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'#description' => t('This sets the max number of recommendations within this node category'),
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'#default_value' => variable_get('creTest_type_n_value', 3),
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);
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}
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else if ($delta == 2)
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{
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$form['creTest_similar_title'] = array(
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'#type' => 'textfield',
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'#title' => t('Title for the similar rated block'),
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'#size' => 20,
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'#description' => t('This sets the title for this block'),
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'#default_value' => variable_get('creTest_similar_title', t('Similarly Rated Nodes')),
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);
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// n_value for this block
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$form['creTest_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('creTest_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('creTest_general_title', $edit['creTest_general_title']);
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variable_set('creTest_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('creTest_type_title', $edit['creTest_type_title']);
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variable_set('creTest_type_n_value', $edit['creTest_type_n_value']);
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variable_set('creTest_type_type', $edit['creTest_type_type']);
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}
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else if ($delta == 2)
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{
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variable_set('creTest_similar_title', $edit['creTest_similar_title']);
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variable_set('creTest_similar_n_value', $edit['creTest_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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$n=variable_get('creTest_n_value',1);
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$block['subject'] = t(variable_get('creTest_general_title', t('Recommended Nodes')));
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$block['content'] = creTest_top_n($uid, $n);
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break;
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case 1: // call for the block that displays a specfic type
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$n=variable_get('creTest_type_n_value',2);
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$block['subject'] = t(variable_get('creTest_type_title', t('Other Recomendations')));
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$block['content'] = t(creTest_top_n($uid,$n, variable_get('creTest_type_type','page')));
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break;
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case 2: // call for the general similar block
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$n = variable_get('creTest_similar_n_value', 3);
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$block['subject'] = t(variable_get('creTest_similar_title', t('Those that like this also liked')));
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$block['content'] = t(creTest_similar($n));
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break;
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}
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return $block;
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}
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}
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function creTest_nodeapi(&$node, $op, $a3 = NULL, $a4 = NULL)
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{
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// do I need this??
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if($op == 'delete')
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{
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// remove all references in dev table where both $nid1 == &$node->nid and $nid2 == &$node->nid
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db_query("DELETE FROM {dev} WHERE nid1=%d OR nid2=%d",$node->nid,$node->nid);
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}
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}
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