<?php

function getPortfolioTarget() {
    $targets = get_entities_from_relationship('member',page_owner(),false,'group','',0, '', 9999, 0, false, 0);
    $tgts = array();
    if (isset($_SESSION['user'])) {
        /*translation:Myself*/
        $tgts[$_SESSION['user']->guid] = $_SESSION['user']->name . " (" . elgg_echo('portfolio:Myself') . ")";
    }
    foreach( $targets as $target ) {
        $tgts[$target->guid] = $target->name;
    }
    return $tgts;
}

function getPortfolioLecturer() {
    $lects = array();
    // this row is user self;
    if (isset($_SESSION['user'])) {
        $lects[$_SESSION['user']->guid] = $_SESSION['user']->name;
    }
    // TODO lecturer list
    return $lects;
}

function canReflect($target) {
    if (!is_array($target)) $target = array($target);
    if (in_array($_SESSION['user']->getGUID(), $target)) return true;
    $targets = get_entities_from_relationship('member',page_owner(),false,'group','',0, '', 9999, 0, false, 0);
    foreach ($targets as $tar) {
        if (in_array($tar->getGUID(), $target)) return true;
    }
    return false;
}

function saveTargetRealations($task, $targets) {
    remove_entity_relationships($task, "hasTask", true, "");
    foreach ($targets as $target) {
		add_entity_relationship($target, "hasTask", $task);
	} 	    
}

function saveSubTask($tasks, $subtask) {
    remove_entity_relationships($subtask, "subTasks", true, "");
    foreach ($tasks as $task) {
		add_entity_relationship($task, "subTasks", $subtask);
	}
}

function getPossibleParentTasks($guid) {
    if (!$guid) return false;
    $parent_tasks = get_entities_from_metadata("hassubtasks", "true", "object", "task", page_owner(), 9999, 0, "", 0, false);
    $ptid = array();
    foreach ($parent_tasks as $parent_task) {
        if ($parent_task->getGUID() != $guid) {
            $ptid[$parent_task->getGUID()] = $parent_task->title;
        }
    }
    return $ptid;
}

function getSubTaskEntities($task) {
    return get_entities_from_relationship("subTasks", $task, false, "object", "task", page_owner(), "", 9999, 0, false, 0);
}

function getParentTaskEntities($subtask) {
    if (!$subtask) return false;
    return get_entities_from_relationship("subTasks", $subtask, true, "object", "task", page_owner(), "", 9999, 0, false, 0);
}

function getParentTaskIds($subtask) {
    if (!$subtask) return false;
    $parent_tasks = getParentTaskEntities($subtask);
    if (!$parent_tasks) {
        return false;
    }
    $ptid = array();
    foreach ($parent_tasks as $parent_task) {
        $ptid []= $parent_task->getGUID();
    }
    return $ptid;
}

function getTaskData($task_guid) {
    $task = get_entity($task_guid);
    if ($task && $task->task) {
        return $task;
    }
    return false;
}

// Shortens text and strips all the tags
function shortenTextForCalendar($text, $max_length) {
    // Let us strip tags at first
    $text = strip_tags($text);

    // If the text length is smaller than we need, just return the text
    if (strlen($text)<=$max_length)
        return $text;

    // Shorten the text
    $text = $text."";
    $text = substr($text, 0, $max_length);
    $text = substr($text, 0, strrpos($text, ' '));

    // If the text could not have been shortened, use the force method
    if (strlen($text)>$max_length)
        $text = substr($text, 0, $max_length-3);
    $text = $text."...";

    return $text;
}

// Return all tasks assigned to a user
function getDayCalendarEvents($date, $for_whom=null) {
    if (empty($for_whom)) {
        return false;
    }
    $all_tasks = array();
    $tasks_for_myself = get_entities_from_relationship("hasTask", $for_whom, false, "object", "task", 0, "", 9999, 0, false, 0);
    if (is_array($tasks_for_myself) && sizeof($tasks_for_myself) > 0) {
        $all_tasks = $tasks_for_myself;
    }
    $my_groups = get_entities_from_relationship('member',$for_whom,false,'group','',0, '', 9999, 0, false, 0);

    foreach ($my_groups as $mg) {
        $group_tasks = get_entities_from_relationship("hasTask", $mg->getGUID(), false, "object", "task", 0, "", 9999, 0, false, 0);
        if (is_array($group_tasks) && sizeof($group_tasks) > 0) {
            foreach ($group_tasks as $single_group_task) {
                if (!in_array($single_group_task, $all_tasks)) {
                    array_push($all_tasks, $single_group_task);
                }
            }
        }
    }
    $suitable_tasks = array();

    foreach ($all_tasks as $task) {
        $startline = $task->startline;
        $deadline = $task->deadline;

        if ($startline && $deadline) {
            if (($date >= $startline) && ($date <= $deadline)) {
                array_push($suitable_tasks, $task);
            }
        }
    }
    return $suitable_tasks;
}
?>