New tasks system.

1 files changed, 295 insertions, 0 deletions

diff --git a/forum/utils/tasks.php b/forum/utils/tasks.php
new file mode 100644
index 0000000..3c5cbcd
--- /dev/null
+++ b/forum/utils/tasks.php
@@ -0,0 +1,295 @@
+<?php
+include_once($UTIL_DIR . "/error.php");
+include_once($UTIL_DIR . "/notify.php");
+
+function xmlenc($message)
+{
+	return htmlspecialchars($message, ENT_QUOTES, "UTF-8");
+}
+
+function userList($uid) {
+	global $users;
+	$str = "";
+	$str .= "<select name=\"userid\">\n";
+	foreach($users->users as $user) {
+		if($user->enabled && $user->uid != 0) {
+			$str .= "<option value=\"".$user->uid."\"";
+			if($user->uid == $uid) $str .= " selected";
+			$str .= ">".$user->name."</option>\n";
+		}
+	}
+	$str .= "</select>";
+	return $str;
+}
+
+class Task {
+	public $id;
+  public $title;
+  public $deadline;
+  public $description;
+  public $lastreminder;
+	public $reassignable;
+  public $userid;
+	public $completed;
+
+	public function write($fp)
+	{
+		fwrite($fp, "  <task id=\"" .xmlenc($this->id) . "\"\n");
+		fwrite($fp, "        title=\"" .xmlenc($this->title) . "\"\n");
+		fwrite($fp, "        deadline=\"" . xmlenc($this->deadline) . "\"\n");
+		fwrite($fp, "        userid=\"" . xmlenc($this->userid) . "\"\n");
+		if($this->reassignable) fwrite($fp, "        reassignable=\"true\"\n");
+		else fwrite($fp, "        reassignable=\"false\"\n");
+		if($this->completed) fwrite($fp, "        completed=\"true\"\n");
+		else fwrite($fp, "        completed=\"false\"\n");
+		fwrite($fp, "        lastreminder=\"" . xmlenc($this->lastreminder) . "\">\n");
+		fwrite($fp, "    <description>".xmlenc($this->description)."</description>\n");
+    if($this->refs) $this->refs->write($fp, "    ");
+		fwrite($fp, "  </task>\n");
+	}
+
+	public function show()
+	{
+		global $users, $current_user;
+		$str .= "  <tr>\n";
+		$str .= "    <form method=\"post\" enctype=\"multipart/form-data\" ".
+			"action=\"?mode=tasks&amp;action=update\">\n";
+		$str .= "    <input type=\"hidden\" name=\"id\" value=\"".$this->id."\"/>\n";
+		if($this->userid == $current_user->uid) {
+			$str .= "    <td>Done<input name=\"completed\" type=\"checkbox\"";
+			if($this->completed) $str .= " checked";
+			$str .= "/></td>\n";
+		} else {
+			if($this->completed) $str .= "    <td>Done ☑</td>\n";
+			else $str .= "    <td>Done ☐</td>\n";
+		}
+		$str .= "    <td><strong>".$this->title."</strong></td>\n";
+		$str .= "    <td>".substr($this->description, 0, 64)."</td>\n";
+
+		if($this->reassignable && $this->userid == $current_user->uid) {
+			$str .= "    <td>".userList($this->userid)."</td>\n";
+		} else {
+			$str .= "    <td><em>".$users->getUser($this->userid)->name."</em></td>\n";
+		}
+
+		$str .= "    <td>Deadline ".date("j/n-Y", $this->deadline)."</td>\n";
+		$str .= "    <td height=\"24px;\">";
+		if($this->userid == $current_user->uid) $str .= "<input type=\"submit\" value=\"set\"/>";
+		$str .= "</td>\n";
+		$str .= "    </form>\n";
+		$str .= "  </tr>\n";
+    return $str;
+  }
+	
+	public function mailTextSubject()
+	{
+		return $this->title . " - deadline: ".date("j/n-Y", $this->deadline);
+	}
+
+	public function mailTextBody()
+	{
+		return $this->title . "\n\n" . $this->description . "\n\nDeadline: ".date("j/n-Y", $this->deadline);
+	}
+
+  public function Task($id, $title, $deadline, $description, $lastreminder,
+											 $reassignable, $userid, $completed)
+  {
+		$this->id = $id;
+    $this->title = $title;
+		$this->deadline = $deadline;
+		$this->description = $description;
+		$this->lastreminder = $lastreminder;
+		$this->reassignable = $reassignable;
+		$this->userid = $userid;
+		$this->completed = $completed;
+  }
+}
+
+class Tasks {
+
+  private $file;
+  public $tasks = array();
+
+  public function show()
+  {
+    $str = "<table>\n";
+
+    foreach($this->tasks as $task) {
+      if($task->completed == false) {
+				$str .= $task->show();
+      }
+    }
+
+    foreach($this->tasks as $task) {
+      if($task->completed == true) {
+				$str .= $task->show();
+      }
+    }
+
+    $str .= "</table>\n";
+    return $str;
+  }
+	
+  public function add($task) {
+		$this->tasks[$task->id] = $task;
+  }
+	
+	public function getNextID()
+	{
+		$id = 0;
+    foreach($this->tasks as $task) {
+			if($task->id > $id) $id = $task->id;
+    }
+		return $id + 1;
+	}
+
+  public function write()
+  {
+    $fp = fopen($this->file, "w");
+    fwrite($fp, "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");
+
+    fwrite($fp, "<tasks>\n");
+    foreach($this->tasks as $task) {
+			$task->write($fp);
+    }
+    fwrite($fp, "</tasks>\n");
+
+    fclose($fp);
+  }
+	
+  private function read()
+  {
+		$dom = new DomDocument;
+    $dom->preserveWhiteSpace = FALSE;
+    $dom->load($this->file);
+    $params = $dom->getElementsByTagName('task');
+
+    foreach($params as $param) {
+
+      $description = "";
+      $dess = $param->getElementsByTagName('description');
+      foreach($dess as $des) {
+				$description = $des->textContent;
+      }
+
+      $task = new Task($param->getAttribute('id'),
+											 $param->getAttribute('title'),
+											 $param->getAttribute('deadline'),
+											 $description,
+											 $param->getAttribute('lastreminder'),
+											 $param->getAttribute('reassignable') == "true",
+											 $param->getAttribute('userid'),
+											 $param->getAttribute('completed') == "true");
+
+      $this->add($task);
+    }
+  }
+
+  public function Tasks($file)
+  {
+    $this->file = $file;
+    if(file_exists($file)) $this->read();
+  }
+
+}
+
+function tasks_init()
+{
+  global $DATA_DIR;
+  return new Tasks($DATA_DIR . "/tasks.xml");
+}
+
+function sendMail($id, $new, $reassigned)
+{
+	global $tasks, $users;
+
+	$task = $tasks->tasks[$id];
+	$task->lastreminder = time();
+	$tasks->write();
+
+	$user = $users->getUser($task->userid);
+
+	$prefix = "Task Reminder - ";
+	if($new) $prefix = "New Task - ";
+	if($reassigned) $prefix = "Reassigned Task - ";
+
+	$email = $user->email;
+	$subject = $prefix . $task->mailTextSubject();
+	$body = $task->mailTextBody();
+
+	send($email, $subject, $body);
+}
+
+$tasks = tasks_init();
+
+if($action == "tick") {
+	$now = time();
+
+	$mininterval = 60 * 60 * 24; // 24 hours
+	$maxinterval = 60 * 60 * 24 * 7; // 1 week
+
+	foreach($tasks->tasks as $task) {
+
+		if($task->completed) continue; // no need for reminding
+
+		if(($now > $task->deadline) && (($now - $task->lastreminder) > $mininterval)) {
+			// Deadline is overdue, and it has been more than $mininterval since last reminder.
+			sendMail($task->id, false, false);
+		} elseif((($task->deadline - $now) > 	$maxinterval) && (($now - $task->lastreminder) > $maxinterval)) {
+			// Deadline is a long way off, but it has been $maxinterval since last reminder.
+			sendMail($task->id, false, false);
+		} elseif((($task->deadline - $now) > 	$mininterval) && (($now - $task->lastreminder) > $mininterval)) {
+			// Deadline is near, and it has been $mininterval since last reminder.
+			sendMail($task->id, false, false);
+		}
+	}
+}
+
+if($action == "update") {
+	$reassigned = false;
+	$id = $GLOBALS['id'];
+	$task = $tasks->tasks[$id];
+	if(isset($GLOBALS['completed'])) $task->completed = $GLOBALS['completed'] == "on";
+	if(isset($GLOBALS['userid'])) {
+		$reassigned = $task->userid != $GLOBALS['userid'];
+		$task->userid = $GLOBALS['userid'];
+	}
+	$tasks->write();
+
+	if($reassigned) sendMail($id, false, true);
+}
+
+if($action == "add") {
+
+	$deadline = strtotime($GLOBALS['deadline_year']."-".
+												$GLOBALS['deadline_month']."-".
+												$GLOBALS['deadline_day']);
+
+	$task = new Task($tasks->getNextID(),
+									 stripslashes($GLOBALS['title']),
+									 $deadline,
+									 stripslashes($GLOBALS['description']),
+									 0,
+									 $GLOBALS['reassignable'] == "on",
+									 $GLOBALS['userid'],
+									 false);
+	$tasks->add($task);
+	$tasks->write();
+
+	sendMail($task->id, true, false);
+}
+
+echo $tasks->show();
+?>
+<hr/>
+<form method="post" enctype="multipart/form-data" action="?mode=tasks&amp;action=add">
+	Title: <input name="title" value=""><br/>
+	User: <?php echo userList($current_user->uid); ?><br/>
+	Deadline: D<input name="deadline_day" style="width: 2em" value="">
+	          M<input name="deadline_month" style="width: 2em" value="">
+            Y<input name="deadline_year" style="width: 4em" value=""><br/>
+	Reassignable: <input name="reassignable" type="checkbox" checked><br/>
+	<textarea name="description" cols="60" rows="2"></textarea><br/>
+	<br/>
+	<button type="submit">Add</button>
+</form>