User reporting Library - php

Question

I would like to build (or find) a php reporting library that I can use to allow my users to report any type of content as bad. Actually, if they could report content as good (which I guess would mean a rating system) that would be even better. So if anyone knows of a library like this I would love to hear about it.
Anyway, this is how I imagine the database working and I would like to know if this sounds correct.
ID - ID of row
USER_ID - ID of the user voting/reporting
ITEM_ID - UNIQUE table row ID of the item reported (post, other user, link, etc...)
TYPE - the name of the table this pertains to (posts, users, links, etc...)
DATE - datetime of report
VALUE - I guess this could be an UP vote or DOWN vote
By including the [TYPE] column I can use this voting system across all content types on my site instead of just one (like forum posts). By storing the user_id I can be sure that only one vote/report is cast per item per user.

Answer 1

Well, I went ahead and built it like I said. Frank was right, it wasn't too hard. Here is the code incase anyone else wants to use it on a MVC that supports AR styled DB calls like CodeIgniter or MicroMVC:
/*
* Multi-table user voting model
*/
class votes extends model {
public static $table = 'votes';
function cast( $user_id = NULL, $item_id = NULL, $type = NULL, $vote = TRUE) {
$where = array(
'user_id' => $user_id,
'item_id' => $item_id,
'type' => $type
);
//Try to fetch this row
$row = $this->db->get_where(self::$table, $where );
//Look for an existing vote row
if( $row && ! empty($row[0]) ) {
//Fetch row
$row = $row[0];
//If they already voted this way... then we're done!
if( $row->vote == $vote) {
return;
}
//Else update the row to the new vote
$row->vote = $vote;
$row->date = convert_time(time());
$this->db->update( self::$table, $row, array('id' => $row->id) );
return;
}
//Else create a new vote for this item
$row = array(
'user_id' => $user_id,
'item_id' => $item_id,
'type' => $type,
'date' => convert_time(time()),
'vote' => $vote,
);
$this->db->insert( self::$table, $row);
}
}