<?php
	class DB {
		var $board = "cacert-board@lists.cacert.org";

		function __construct() {
			$this->dbh = new PDO("sqlite:".dirname(__FILE__)."/database.sqlite");
			$this->statement = array();
			$this->statement['list decisions'] = $this->dbh->prepare("SELECT decisions.id AS id, decisions.tag, voters.name AS proposer, decisions.proposed, decisions.title, decisions.content, decisions.quorum, decisions.majority, decisions.status, decisions.due, decisions.modified, (SELECT COUNT(*) FROM votes WHERE decision=decisions.id AND vote=1) AS ayes, (SELECT COUNT(*) FROM votes WHERE decision=decisions.id AND vote=-1) AS nayes, (SELECT COUNT(*) FROM votes WHERE decision=decisions.id AND vote=0) AS abstains FROM decisions, voters WHERE decisions.proponent=voters.id ORDER BY proposed DESC LIMIT 10 OFFSET 10 * (:page - 1);");
			$this->statement['closed decisions'] = $this->dbh->prepare("SELECT decisions.id, decisions.tag, voters.name AS proposer, decisions.proposed, decisions.title, decisions.content, decisions.quorum, decisions.majority, decisions.status, decisions.due, decisions.modified, (SELECT COUNT(*) FROM votes WHERE decision=decisions.id AND vote=1) AS ayes, (SELECT COUNT(*) FROM votes WHERE decision=decisions.id AND vote=-1) AS nayes, (SELECT COUNT(*) FROM votes WHERE decision=decisions.id AND vote=0) AS abstains FROM decisions, voters WHERE decisions.proponent=voters.id AND decisions.status=0 AND datetime('now','utc') > datetime(due);");
			$this->statement['get decision'] = $this->dbh->prepare("SELECT decisions.id, decisions.tag, decisions.proponent, voters.name AS proposer, decisions.proposed, decisions.title, decisions.content, decisions.quorum, decisions.majority, decisions.status, decisions.due, decisions.modified, (SELECT COUNT(*) FROM votes WHERE decision=decisions.id AND vote=1) AS ayes, (SELECT COUNT(*) FROM votes WHERE decision=decisions.id AND vote=-1) AS nayes, (SELECT COUNT(*) FROM votes WHERE decision=decisions.id AND vote=0) AS abstains FROM decisions, voters WHERE decisions.proponent=voters.id AND decisions.id=:decision;");
			$this->statement['get new decision'] = $this->dbh->prepare("SELECT decisions.id, decisions.tag, decisions.proponent, voters.name AS proposer, decisions.proposed, decisions.title, decisions.content, decisions.quorum, decisions.majority, decisions.status, decisions.due, decisions.modified, (SELECT COUNT(*) FROM votes WHERE decision=decisions.id AND vote=1) AS ayes, (SELECT COUNT(*) FROM votes WHERE decision=decisions.id AND vote=-1) AS nayes, (SELECT COUNT(*) FROM votes WHERE decision=decisions.id AND vote=0) AS abstains FROM decisions, voters WHERE decisions.proponent=voters.id AND decisions.id=last_insert_rowid();");
			$this->statement['get voter'] = $this->dbh->prepare("SELECT voters.id, voters.name FROM voters, emails WHERE voters.id=emails.voter AND emails.address=? AND voters.enabled=1");
			$this->statement['get voter by id'] = $this->dbh->prepare("SELECT voters.id, voters.name FROM voters WHERE id=:id;");
			$this->statement['get voters'] = $this->dbh->prepare("SELECT voters.id, voters.name FROM voters WHERE voters.enabled=1 ORDER BY name ASC;");
			$this->statement['del vote'] = $this->dbh->prepare("DELETE FROM votes WHERE decision=:decision AND voter=:voter;");
			$this->statement['do vote'] = $this->dbh->prepare("INSERT INTO votes (decision, voter, vote, voted, notes) VALUES (:decision, :voter, :vote, datetime('now','utc'), :notes);");
			$this->statement['stats'] = $this->dbh->prepare("SELECT COUNT(*) AS voters FROM voters WHERE enabled=1;");
			$this->statement['list votes'] = $this->dbh->prepare("SELECT voters.name AS name, votes.vote AS vote FROM voters,votes WHERE voters.id=votes.voter AND votes.decision=:id;");
			$this->statement['create decision'] = $this->dbh->prepare("INSERT INTO decisions (proposed, proponent, title, content, quorum, majority, status, due, modified) VALUES (datetime('now','utc'), :proponent, :title, :content, :quorum, :majority, 0, datetime('now','utc', :due), datetime('now','utc'));");
			$this->statement['post create'] = $this->dbh->prepare(" UPDATE decisions SET tag='m' || strftime('%Y%m%d','now') || '.' || id WHERE id=last_insert_rowid();");
			$this->statement['update decision'] = $this->dbh->prepare("UPDATE decisions SET proposed=datetime('now','utc'), proponent=:proponent, title=:title, content=:content, quorum=:quorum, majority=:majority, status=0, due=datetime('now','utc',:due), modified=datetime('now','utc') WHERE id=:id;");
			$this->statement['close decision'] = $this->dbh->prepare("UPDATE decisions SET status=:status, modified=datetime('now','utc') WHERE id=:decision");
		}
		function getStatement($name) {
			return $this->statement[$name];
		}
		function closeVotes() {
			$stmt = $this->getStatement("closed decisions");
			$upd = $this->getStatement("close decision");
			if ($stmt->execute()) {
				while ($decision = $stmt->fetch()) {
					$votes = $decision['ayes'] + $decision['nayes'] + $decision['abstains'];
					if ($votes < $decision['quorum']) {
						$decision['status'] = -1;
					} else {
						$votes = $decision['ayes'] + $decision['nayes'];
						if (($decision['ayes'] / $votes) >= ($decision['majority'] / 100)) {
							$decision['status'] = 1;
						} else {
							$decision['status'] = -1;
						}
					}
					$upd->bindParam(":decision",$decision['id']);
					$upd->bindParam(":status",$decision['status']);
					$upd->execute();
					$state = $decision['status']==1?"accepted":"declined";
					$tag = $decision['tag'];
					$title = $decision['title'];
					$content = $decision['content'];
					$quorum = $decision['quorum'];
					$majority = $decision['majority'];
					$ayes = $decision['ayes'];
					$nayes = $decision['nayes'];
					$abstains = $decision['abstains'];
					$totalvotes = $decision['ayes']+$decision['nayes'];
					if ($totalvotes <= 0) $percent = 0;
					else $percent = $decision['ayes'] * 100 / $totalvotes;
					$body = <<<BODY
Dear Board,

The motion with the identifier $tag has been $state.

Motion:
    $title
    $content

Votes:
	Quorum: $quorum
	Majority: $majority%
	
	Ayes: $ayes
	Nayes: $nayes
	Abstentions: $abstains
	
	Percentage: $percent%
	
Kind regards,
the voting system.

BODY;
					$this->notify("Re: ".$decision['tag']." - ".$decision['title'],$body);
				}
			}
		}
		function notify($subject,$body)
		{
			mail($this->board,$subject,$body,"From: Voting System <returns@cacert.org>");
			//mail("testsympa@lists.cacert.org",$subject,$body,"From: Voting System <returns@cacert.org>");
		}
	}
?>