workflowutil.inc.php

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<?php
/**
 * $Id: workflowutil.inc.php 8387 2008-04-22 16:36:04Z kevin_fourie $
 *
 * KnowledgeTree Community Edition
 * Document Management Made Simple
 * Copyright (C) 2008 KnowledgeTree Inc.
 * Portions copyright The Jam Warehouse Software (Pty) Limited
 * 
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License version 3 as published by the
 * Free Software Foundation.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * 
 * You can contact KnowledgeTree Inc., PO Box 7775 #87847, San Francisco, 
 * California 94120-7775, or email [e-mail].
 * 
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU General Public License version 3.
 * 
 * In accordance with Section 7(b) of the GNU General Public License version 3,
 * these Appropriate Legal Notices must retain the display of the "Powered by
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 * logo is not reasonably feasible for technical reasons, the Appropriate Legal Notices
 * must display the words "Powered by KnowledgeTree" and retain the original 
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 * Contributor( s): ______________________________________
 *
 */

require_once(KT_LIB_DIR . '/workflow/workflow.inc.php');
require_once(KT_LIB_DIR . '/workflow/workflowstate.inc.php');
require_once(KT_LIB_DIR . '/workflow/workflowtransition.inc.php');
require_once(KT_LIB_DIR . '/workflow/workflowtrigger.inc.php');
require_once(KT_LIB_DIR . '/workflow/workflowtriggerinstance.inc.php');

require_once(KT_LIB_DIR . '/permissions/permissionutil.inc.php');
require_once(KT_LIB_DIR . '/groups/GroupUtil.php');
require_once(KT_LIB_DIR . '/documentmanagement/DocumentTransaction.inc');
require_once(KT_LIB_DIR . '/search/searchutil.inc.php');
require_once(KT_LIB_DIR . '/roles/roleallocation.inc.php');

require_once(KT_LIB_DIR . '/groups/Group.inc');
require_once(KT_LIB_DIR . '/users/User.inc');
require_once(KT_LIB_DIR . '/roles/Role.inc');

require_once(KT_LIB_DIR . '/dashboard/Notification.inc.php');


class KTWorkflowUtil {
    // {{{ saveTransitionsFrom
    /**
     * Saves which workflow transitions are available to be chosen from
     * this workflow state.
     *
     * Workflow transitions have only destination workflow states, and
     * it is up to the workflow state to decide which workflow
     * transitions it wants to allow to leave its state.
     */
    function saveTransitionsFrom($oState, $aTransitionIds) {
        $sTable = KTUtil::getTableName('workflow_state_transitions');
        $aQuery = array(
            "DELETE FROM $sTable WHERE state_id = ?",
            array($oState->getId()),
        );
        $res = DBUtil::runQuery($aQuery);
        if (PEAR::isError($res)) {
            return $res;
        }
        $aOptions = array('noid' => true);
        if (empty($aTransitionIds)) {
            return; // don't fail if there are no transitions.
        }
        foreach ($aTransitionIds as $iTransitionId) {
            $res = DBUtil::autoInsert($sTable, array(
                'state_id' => $oState->getId(),
                'transition_id' => $iTransitionId,
            ), $aOptions);
            if (PEAR::isError($res)) {
                return $res;
            }
        }
        return;
    }
    // }}}

    // {{{ getTransitionsFrom
    /**
     * Gets which workflow transitions are available to be chosen from
     * this workflow state.
     *
     * Workflow transitions have only destination workflow states, and
     * it is up to the workflow state to decide which workflow
     * transitions it wants to allow to leave its state.
     *
     * This function optionally will return the database id numbers of
     * the workflow transitions using the 'ids' option.
     */
    function getTransitionsFrom($oState, $aOptions = null) {
        $bIds = KTUtil::arrayGet($aOptions, 'ids');
        $sTable = KTUtil::getTableName('workflow_state_transitions');
        $aQuery = array(
            "SELECT transition_id FROM $sTable WHERE state_id = ?",
            array($oState->getId()),
        );
        $aTransitionIds = DBUtil::getResultArrayKey($aQuery, 'transition_id');
        if (PEAR::isError($aTransitionIds)) {
            return $aTransitionIds;
        }
        if ($bIds) {
            return $aTransitionIds;
        }
        $aRet = array();
        foreach ($aTransitionIds as $iId) {
            $aRet[] =& KTWorkflowTransition::get($iId);
        }
        return $aRet;
    }
    // }}}


    /* WILL NOT RESET THE WORKFLOW if changing to the -same- workflow */
    function changeWorkflowOnDocument($oWorkflow, $oDocument) {
        $oDocument =& KTUtil::getObject('Document', $oDocument);


        // fix for 1049: workflows reset on document move.
        // this was the original purpose of "changeWorkflowOnDocument".
        if (is_null($oWorkflow)) {
            if ($oDocument->getWorkflowId() == null) {
                return true; // no definition.
            }
        } else {
            if ($oDocument->getWorkflowId() == $oWorkflow->getId()) {
                return true; // bail out, essentially.
            }
        }

        return KTWorkflowUtil::startWorkflowOnDocument($oWorkflow, $oDocument);
    }
    // {{{ startWorkflowOnDocument
    /**
     * Starts the workflow process on a document, placing it into the
     * starting workflow state for the given workflow.
     */
    function startWorkflowOnDocument ($oWorkflow, $oDocument) {
        $oDocument =& KTUtil::getObject('Document', $oDocument);
        $iDocumentId = $oDocument->getId();

        $oUser = User::get($_SESSION['userID']);

        $iPreviousMetadataVersion = $oDocument->getMetadataVersionId();
        $oDocument->startNewMetadataVersion($oUser);
        KTDocumentUtil::copyMetadata($oDocument, $iPreviousMetadataVersion);

        if (!empty($oWorkflow)) {
            $oWorkflow =& KTUtil::getObject('KTWorkflow', $oWorkflow);
            $iWorkflowId = $oWorkflow->getId();
            // null workflow == remove workflow.
            if (is_null($oWorkflow) || PEAR::isError($oWorkflow) || ($oWorkflow == false)) {
                return true; // delete and no-act.
            }
            $iStartStateId = $oWorkflow->getStartStateId();
            if (empty($iStartStateId)) {
                return PEAR::raiseError(_kt('Cannot assign workflow with no starting state set'));
            }

            $oDocument->setWorkflowId($iWorkflowId);
            $oDocument->setWorkflowStateId($iStartStateId);
            $sTransactionComments = sprintf(_kt("Workflow \"%s\" started."), $oWorkflow->getHumanName());

        } else {
            $oDocument->setWorkflowId(null);
            $oDocument->setWorkflowStateId(null);
            $sTransactionComments = _kt('Workflow removed from document.');
        }

        $res = $oDocument->update();
        if (PEAR::isError($res)) { return $res; }

        // create the document transaction record
        $oDocumentTransaction = new DocumentTransaction($oDocument, $sTransactionComments, 'ktcore.transactions.workflow_state_transition');
        $oDocumentTransaction->create();


        // FIXME does this function as expected?

        KTPermissionUtil::updatePermissionLookup($oDocument);

        if (isset($iStartStateId)) {
            $oTargetState = KTWorkflowState::get($iStartStateId);
            KTWorkflowUtil::informUsersForState($oTargetState,
                KTWorkflowUtil::getInformedForState($oTargetState), $oDocument, $oUser, '');
        }

        return $res;
    }
    // }}}

    // {{{ getControlledActionsForWorkflow
    /**
     * Gets the actions that are controlled by a workflow.
     *
     * A controlled action is one that can be enabled or disabled by a
     * workflow state attached to this workflow.  This allows for
     * actions such as "Delete" to not be allowed to occur during the
     * workflow, or for special actions such as "Publish" to only occur
     * when a particular workflow state is reached.
     */
    function getControlledActionsForWorkflow($oWorkflow) {
        $iWorkflowId = KTUtil::getId($oWorkflow);
        $sTable = KTUtil::getTableName('workflow_actions');

        $aQuery = array(
            "SELECT action_name FROM $sTable WHERE workflow_id = ?",
            array($iWorkflowId),
        );
        return DBUtil::getResultArrayKey($aQuery, 'action_name');
    }
    // }}}

    // {{{ setControlledActionsForWorkflow
    /**
     * Sets the actions that are controlled by a workflow.
     *
     * A controlled action is one that can be enabled or disabled by a
     * workflow state attached to this workflow.  This allows for
     * actions such as "Delete" to not be allowed to occur during the
     * workflow, or for special actions such as "Publish" to only occur
     * when a particular workflow state is reached.
     */
    function setControlledActionsForWorkflow($oWorkflow, $aActions) {
        $iWorkflowId = KTUtil::getId($oWorkflow);
        $sTable = KTUtil::getTableName('workflow_actions');

        $aQuery = array(
            "DELETE FROM $sTable WHERE workflow_id = ?",
            array($iWorkflowId),
        );
        $res = DBUtil::runQuery($aQuery);
        if (PEAR::isError($res)) {
            return $res;
        }
        $aOptions = array('noid' => true);
        if (!empty($aActions)) {
            foreach ($aActions as $sAction) {
                $res = DBUtil::autoInsert($sTable, array(
                    'workflow_id' => $iWorkflowId,
                    'action_name' => $sAction,
                ), $aOptions);
                if (PEAR::isError($res)) {
                   return $res;
                }
            }
        }
        return;
    }
    // }}}

    // FIXME DEPRECATED

    // {{{ setEnabledActionsForState
    /**
     * Sets the actions that are enabled by this workflow state.
     *
     * A controlled action is one that can be enabled or disabled by a
     * workflow state attached to this workflow.  This allows for
     * actions such as "Delete" to not be allowed to occur during the
     * workflow, or for special actions such as "Publish" to only occur
     * when a particular workflow state is reached.
     *
     * Only the enabled actions are tracked.  Any actions controlled by
     * the workflow but not explicitly enabled are disabled.
     */
    function setEnabledActionsForState($oState, $aActions) {
        $iStateId = KTUtil::getId($oState);
        $sTable = KTUtil::getTableName('workflow_state_actions');

        $aQuery = array(
            "DELETE FROM $sTable WHERE state_id = ?",
            array($iStateId),
        );
        $res = DBUtil::runQuery($aQuery);
        if (PEAR::isError($res)) {
            return $res;
        }

        if(!is_array($aActions)) return;