class.ilBuddyList.php

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<?php
/* Copyright (c) 1998-2015 ILIAS open source, Extended GPL, see docs/LICENSE */

require_once 'Services/Contact/BuddySystem/classes/class.ilBuddySystemRelationRepository.php';
require_once 'Services/Contact/BuddySystem/classes/class.ilBuddySystemRelationCollection.php';
require_once 'Services/Contact/BuddySystem/classes/class.ilBuddySystemRelation.php';
require_once 'Services/Contact/BuddySystem/exceptions/class.ilBuddySystemException.php';
require_once 'Services/Contact/BuddySystem/exceptions/class.ilBuddySystemRelationStateAlreadyGivenException.php';
require_once 'Services/Contact/BuddySystem/classes/states/class.ilBuddySystemLinkedRelationState.php';
require_once 'Services/Contact/BuddySystem/classes/states/class.ilBuddySystemUnlinkedRelationState.php';
require_once 'Services/Contact/BuddySystem/classes/states/class.ilBuddySystemRequestedRelationState.php';
require_once 'Services/Contact/BuddySystem/classes/states/class.ilBuddySystemIgnoredRequestRelationState.php';

class ilBuddyList
{
        protected $owner_id;

        protected $relations;

        protected $repository;

        protected static $instances = array();

        protected $relations_read = false;

        protected $event_handler;

        public static function getInstanceByUserId($usr_id)
        {
                if(ilObjUser::_isAnonymous($usr_id))
                {
                        throw new ilBuddySystemException(sprintf("You cannot create an instance for the anonymous user (id: %s)", $usr_id));
                }

                if(isset(self::$instances[$usr_id]))
                {
                        return self::$instances[$usr_id];
                }

                self::$instances[$usr_id] = new self($usr_id);
                return self::$instances[$usr_id];
        }

        public static function getInstanceByGlobalUser()
        {
                global $DIC;

                return self::getInstanceByUserId($DIC->user()->getId());
        }

        protected function __construct($owner_id)
        {
                global $DIC;

                $this->setOwnerId($owner_id);
                $this->setRepository(new ilBuddySystemRelationRepository($this->getOwnerId()));

                $this->event_handler = $DIC['ilAppEventHandler'];
        }

        public function reset()
        {
                $this->relations_read = false;
                $this->relations      = null;
                unset(self::$instances[$this->getOwnerId()]);
        }

        public function getRepository()
        {
                return $this->repository;
        }

        public function setRepository($repository)
        {
                $this->repository = $repository;
        }

        public function readFromRepository()
        {
                $this->setRelations(new ilBuddySystemRelationCollection((array)$this->getRepository()->getAll()));
        }

        protected function performLazyLoading()
        {
                if(!$this->relations_read)
                {
                        $this->readFromRepository();
                        $this->relations_read = true;
                }
        }

        public function getRelations()
        {
                if(null === $this->relations)
                {
                        $this->performLazyLoading();
                }

                return $this->relations;
        }

        public function setRelations(ilBuddySystemRelationCollection $relations)
        {
                $this->relations = $relations;
        }

        public function getOwnerId()
        {
                return $this->owner_id;
        }

        public function getLinkedRelations()
        {
                return $this->getRelations()->filter(function(ilBuddySystemRelation $relation) {
                        return $relation->isLinked();
                });
        }

        public function getRequestRelationsForOwner()
        {
                $owner = $this->getOwnerId();
                return $this->getRequestedRelations()->filter(function(ilBuddySystemRelation $relation) use ($owner) {
                        return $relation->getBuddyUserId() == $owner;
                });
        }

        public function getRequestRelationsByOwner()
        {
                $owner = $this->getOwnerId();
                return $this->getRequestedRelations()->filter(function(ilBuddySystemRelation $relation) use ($owner) {
                        return $relation->getUserId() == $owner;
                });
        }

        public function getRequestedRelations()
        {
                return $this->getRelations()->filter(function(ilBuddySystemRelation $relation) {
                        return $relation->isRequested();
                });
        }

        public function getIgnoredRelationsForOwner()
        {
                $owner = $this->getOwnerId();
                return $this->getIgnoredRelations()->filter(function(ilBuddySystemRelation $relation) use ($owner) {
                        return $relation->getBuddyUserId() == $owner;
                });
        }

        public function getIgnoredRelationsByOwner()
        {
                $owner = $this->getOwnerId();
                return $this->getIgnoredRelations()->filter(function(ilBuddySystemRelation $relation) use ($owner) {
                        return $relation->getUserId() == $owner;
                });
        }

        public function getIgnoredRelations()
        {
                return $this->getRelations()->filter(function(ilBuddySystemRelation $relation) {
                        return $relation->isIgnored();
                });
        }

        public function getRelationUserIds()
        {
                return $this->getRelations()->getKeys();
        }

        public function setOwnerId($owner_id)
        {
                if(!is_numeric($owner_id))
                {
                        throw new InvalidArgumentException(sprintf("Please pass a numeric owner id, given: %s", var_export($owner_id, 1)));
                }

                $this->owner_id = $owner_id;
        }

        protected function getRelationTargetUserId(ilBuddySystemRelation $relation)
        {
                return ($relation->getUserId() == $this->getOwnerId() ? $relation->getBuddyUserId() : $relation->getUserId());
        }

        public function getRelationByUserId($usr_id)
        {
                if(!is_numeric($usr_id))
                {
                        throw new InvalidArgumentException(sprintf("Please pass a numeric owner id, given: %s", var_export($usr_id, 1)));
                }

                if($this->getRelations()->containsKey($usr_id))
                {
                        return $this->getRelations()->get($usr_id);
                }

                require_once 'Services/Contact/BuddySystem/classes/states/class.ilBuddySystemRelationStateFactory.php';
                $relation = new ilBuddySystemRelation(ilBuddySystemRelationStateFactory::getInstance()->getInitialState());
                $relation->setIsOwnedByRequest(true);
                $relation->setUserId($this->getOwnerId());
                $relation->setBuddyUserId($usr_id);
                $relation->setTimestamp(time());

                $this->getRelations()->set($usr_id, $relation);

                return $relation;
        }

        public function link(ilBuddySystemRelation $relation)
        {
                try
                {
                        if($relation->isLinked())
                        {
                                require_once 'Services/Contact/BuddySystem/exceptions/class.ilBuddySystemRelationStateAlreadyGivenException.php';
                                throw new ilBuddySystemRelationStateAlreadyGivenException('buddy_bs_action_already_linked');
                        }

                        if($this->getOwnerId() == $relation->getUserId())
                        {
                                throw new ilBuddySystemException("You can only accept a request when you are not the initiator");
                        }

                        $relation->link();

                        $this->getRepository()->save($relation);
                        $this->getRelations()->set($this->getRelationTargetUserId($relation), $relation);
                }
                catch(ilBuddySystemRelationStateException $e)
                {
                        throw $e;
                }

                return $this;
        }

        public function unlink(ilBuddySystemRelation $relation)
        {
                try
                {
                        $relation->unlink();
                        $this->getRepository()->save($relation);
                        $this->getRelations()->set($this->getRelationTargetUserId($relation), $relation);
                }
                catch(ilBuddySystemException $e)
                {
                        if($relation->isUnlinked())
                        {
                                require_once 'Services/Contact/BuddySystem/exceptions/class.ilBuddySystemRelationStateAlreadyGivenException.php';
                                throw new ilBuddySystemRelationStateAlreadyGivenException('buddy_bs_action_already_unlinked');
                        }

                        throw $e;
                }

                return $this;
        }

        public function request(ilBuddySystemRelation $relation)
        {
                if(ilObjUser::_isAnonymous($this->getRelationTargetUserId($relation)))
                {
                        throw new ilBuddySystemException(sprintf("You cannot add the anonymous user to the list (id: %s)", $this->getRelationTargetUserId($relation)));
                }

                if(!strlen(ilObjUser::_lookupLogin($this->getRelationTargetUserId($relation))))
                {
                        throw new ilBuddySystemException(sprintf("You cannot add a non existing user (id: %s)", $this->getRelationTargetUserId($relation)));
                }

                try
                {
                        $relation->request();
                        $this->getRepository()->save($relation);
                        $this->getRelations()->set($this->getRelationTargetUserId($relation), $relation);
                }
                catch(ilBuddySystemException $e)
                {
                        if($relation->isRequested())
                        {
                                require_once 'Services/Contact/BuddySystem/exceptions/class.ilBuddySystemRelationStateAlreadyGivenException.php';
                                throw new ilBuddySystemRelationStateAlreadyGivenException('buddy_bs_action_already_requested');
                        }

                        throw $e;
                }

                $this->event_handler->raise(
                        'Services/Contact',
                        'contactRequested',
                        array(
                                'usr_id' => $this->getRelationTargetUserId($relation)
                        )
                );

                return $this;
        }

        public function ignore(ilBuddySystemRelation $relation)
        {
                try
                {
                        if($relation->isLinked())
                        {
                                require_once 'Services/Contact/BuddySystem/exceptions/class.ilBuddySystemRelationStateTransitionException.php';
                                throw new ilBuddySystemRelationStateTransitionException('buddy_bs_action_already_linked');
                        }

                        if($this->getOwnerId() == $relation->getUserId())
                        {
                                throw new ilBuddySystemException("You can only ignore a request when you are not the initiator");
                        }

                        $relation->ignore();

                        $this->getRepository()->save($relation);
                        $this->getRelations()->set($this->getRelationTargetUserId($relation), $relation);
                }
                catch(ilBuddySystemException $e)
                {
                        if($relation->isIgnored())
                        {
                                require_once 'Services/Contact/BuddySystem/exceptions/class.ilBuddySystemRelationStateAlreadyGivenException.php';
                                throw new ilBuddySystemRelationStateAlreadyGivenException('buddy_bs_action_already_ignored');
                        }

                        throw $e;
                }

                return $this;
        }

        public function destroy()
        {
                $this->getRepository()->destroy();
                $this->getRelations()->clear();
                return $this;
        }
}