<?php
/**
 * $Id$
 *
 * The contents of this file are subject to the KnowledgeTree Public
 * License Version 1.1.2 ("License"); You may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://www.knowledgetree.com/KPL
 * 
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.
 * See the License for the specific language governing rights and
 * limitations under the License.
 *
 * All copies of the Covered Code must include on each user interface screen:
 *    (i) the "Powered by KnowledgeTree" logo and
 *    (ii) the KnowledgeTree copyright notice
 * in the same form as they appear in the distribution.  See the License for
 * requirements.
 * 
 * The Original Code is: KnowledgeTree Open Source
 * 
 * The Initial Developer of the Original Code is The Jam Warehouse Software
 * (Pty) Ltd, trading as KnowledgeTree.
 * Portions created by The Jam Warehouse Software (Pty) Ltd are Copyright
 * (C) 2007 The Jam Warehouse Software (Pty) Ltd;
 * All Rights Reserved.
 * Contributor( s): ______________________________________
 *
 */

/*  KT3 Fieldset (DISPLAY ONLY)
 *
 *  Very simple wrapper that establishes the absolutely basic API.
 *  FIXME:  do we want to include anything from Fieldset.inc?
 *
 *  each object's render() function takes a $aDocumentData, which includes
 *    "document" => $oDocument
 *    "document_id" => $iDocumentId
 *
 */
 
// boilerplate
require_once(KT_LIB_DIR . "/templating/templating.inc.php");
require_once(KT_LIB_DIR . "/database/dbutil.inc");

require_once(KT_LIB_DIR . "/documentmanagement/MDTree.inc"); // :(


// data acquisition
require_once(KT_LIB_DIR . "/users/User.inc");
require_once(KT_LIB_DIR . '/documentmanagement/MetaData.inc');
require_once(KT_LIB_DIR . "/widgets/FieldsetDisplayRegistry.inc.php");
require_once(KT_LIB_DIR . "/widgets/fieldWidgets.php");


/* it may be useful to move this to a factory, eventually? */
function getWidgetForMetadataField($field, $current_value, $page, $errors = null, $vocab = null, $aOptions = null) {
    // all fields have these elements.
    $fieldLabel = $field->getName();
    $fieldDescription = $field->getDescription();
    $fieldValue = $current_value;
    $fieldErrors = $errors; // array of strings
    $fieldName = 'metadata_' . $field->getID();
    $fieldOptions = array();
    $fieldRequired = $field->getIsMandatory() || KTUtil::arrayGet($aOptions, 'required', false);
    if ($fieldRequired == 1) {
        $fieldRequired = true;
    }
    if ($errors === null) {
        $fieldErrors = array();
    } else {
        $fieldErrors = $errors; 
    }
    

    // now we need to break, based on a few aspects of the oField (DocumentField)
    if ($field->getHasLookup()) {
        // could either be normal, or a tree.
        // ignore trees (for now).
        if (!$field->getHasLookupTree()) {
           // FIXME we need to somehow handle both value-value and id-value here
           // extract the lookup.
            if ($vocab === null) { // allow override
                $lookups = MetaData::getEnabledByDocumentField($field);
                $fieldOptions["vocab"] = array(); // FIXME handle lookups
                $fieldOptions['vocab'][''] = _kt('Select a value');				
                foreach ($lookups as $md) {
                    $fieldOptions["vocab"][$md->getName()] = $md->getName();
                }
            } else {
                $fieldOptions["vocab"] = $vocab; 
            }
            
            $oField = new KTLookupWidget($fieldLabel, $fieldDescription, $fieldName, $fieldValue, $page, $fieldRequired, null, $fieldErrors, $fieldOptions);       
        } else {
            // FIXME vocab's are _not_ supported for tree-inputs.  this means conditional-tree-widgets are not unsupported.
            
            // for trees, we are currently brutal.
            $fieldTree = new MDTree();
            $fieldTree->buildForField($field->getId());
            $fieldTree->setActiveItem($current_value);
			$fieldOptions['tree'] = $fieldTree->_evilTreeRenderer($fieldTree, $fieldName);
            
            $oField = new KTTreeWidget($fieldLabel, $fieldDescription, $fieldName, $fieldValue, $page, $fieldRequired, null, $fieldErrors, $fieldOptions);          
        }
    } else {
        $oField = new KTBaseWidget($fieldLabel, $fieldDescription, $fieldName, $fieldValue, $page, $fieldRequired, null, $fieldErrors, $fieldOptions);       
    }

    return $oField;
}


// FIXME need to establish some kind of api to pass in i18n information.
class KTFieldsetDisplay {
    var $fieldset;

    function KTFieldsetDisplay($oFieldset) {
        $this->fieldset = $oFieldset;
    }
    

    function _dateHelper($dDate) {
        $dColumnDate = strtotime($dDate);
        return date("Y-m-d H:i", $dColumnDate);
    }
    
    
    function _sizeHelper($size) {
        $finalSize = $size;
        $label = 'b';
        
        if ($finalSize > 1000) { $label='Kb'; $finalSize = floor($finalSize/1000); }
        if ($finalSize > 1000) { $label='Mb'; $finalSize = floor($finalSize/1000); }
        return $finalSize . $label;
    }
    
    function _mimeHelper($iMimeTypeId) {
        // FIXME lazy cache this.
        // FIXME extend mime_types to have something useful to say.
        $sQuery = 'SELECT * FROM mime_types WHERE id = ?';
        $res = DBUtil::getOneResult(array($sQuery, array($iMimeTypeId)));
        
        if (PEAR::isError($res)) {
            return _kt('unknown type');
        }
		
        if (!empty($res['friendly_name'])) {
            return _kt($res['friendly_name']);
        } else {
		    return sprintf(_kt('%s File'), strtoupper($res['filetypes']));
		}

    }
    
    
    // this should multiplex i18n_title
    function getTitle() { return $this->sTitle; }
    
    function render($aDocumentData) {
        return '<p class="ktError">Warning:  Abstract Fieldset created.</p>';
    }
    
    function renderComparison($aDocumentData, $aComparisonData) {
        return '<div class="ktError">Not implemented:  comparison rendering</div>';
    }
    
    // we need the $main to (potentially) add js, etc.
    function renderEdit($document_data) {
        return '<div class="ktError">Not Implemented: fieldset editing.</div>';
    }

    function setError($aError) {
        $this->aError = $aError;
    }
}

// The generic object
class GenericFieldsetDisplay extends KTFieldsetDisplay {

    // DON'T take anything.
    function GenericFieldsetDisplay() {
    
    }
    
    function render($aDocumentData) {
        // we do a fair bit of fetching, etc. in here.
        $document = $aDocumentData["document"];        

        // creation
        $creator =& User::get($document->getCreatorId());
        if (PEAR::isError($creator)) {
           $creator_name = "<span class='ktError'>" . _kt("Unable to find the document's creator") . "</span>";
        } else {
           $creator_name = $creator->getName();
        }
        $owner =& User::get($document->getOwnerId());
        if (PEAR::isError($owner)) {
           $owner_name = "<span class='ktError'>" . _kt("Unable to find the document's owner") . "</span>";
        } else {
           $owner_name = $owner->getName();
        }
        $modified_user =& User::get($document->getModifiedUserId());
        if (PEAR::isError($modified_user)) {
           $modified_user_name = "<span class='ktError'>" . _kt("Unable to find the document's modifier") . "</span>";
        } else {
           $modified_user_name = $modified_user->getName();
        }
        $creation_date = $this->_dateHelper($document->getCreatedDateTime());

        // last mod
        $last_modified_date = $this->_dateHelper($document->getLastModifiedDate());
        
        // document type // FIXME move this to view.php
        $document_type = $aDocumentData["document_type"]->getName();

        $oWorkflow = KTWorkflowUtil::getWorkflowForDocument($document);
        $oState = KTWorkflowUtil::getWorkflowStateForDocument($document);
        
        
        $oTemplating =& KTTemplating::getSingleton();        
        $oTemplate = $oTemplating->loadTemplate("kt3/fieldsets/generic");
        $aTemplateData = array(
            "context" => $this,
            "document_data" => $aDocumentData,
            "document" => $aDocumentData["document"],

			"filename" => $document->getFileName(),
			
            "creator" => $creator_name,
            "owner" => $owner_name,
            "creation_date" => $creation_date,
            
            "last_modified_by" => $modified_user_name,
            "last_modified_date" => $last_modified_date,
            
            "document_type" => $document_type,
            
            "workflow_state" => $oState,
            "workflow" => $oWorkflow,
        );

        return $oTemplate->render($aTemplateData);        
    }
    
    function renderComparison($aDocumentData, $aComparisonData) {
// we do a fair bit of fetching, etc. in here.
        $document = $aDocumentData["document"];      
        $comparison_document = $aComparisonData["document"];

        // creation
        $creator =& User::get($document->getCreatorId());
        if (PEAR::isError($creator)) {
           $creator = "<span class='ktError'>" . _kt("Unable to find the document's creator") . "</span>";
        } else {
           $creator = $creator->getName();
        }
        $creation_date = $this->_dateHelper($document->getCreatedDateTime());

        // last mod
        $last_modified_date = $this->_dateHelper($document->getVersionCreated());
        $comparison_last_modified_date = $this->_dateHelper($comparison_document->getVersionCreated());
        
        // document type // FIXME move this to view.php
        $document_type = $aDocumentData["document_type"]->getName();
        $comparison_document_type = $aComparisonData["document_type"]->getName();
        
        $modified_user =& User::get($document->getVersionCreatorId());
        if (PEAR::isError($modified_user)) {
           $modified_user = "<span class='ktError'>" . _kt("Unable to find the document's modifier") . "</span>";
        } else {
           $modified_user = $modified_user->getName();
        }

        $owner_user =& User::get($document->getOwnerId());
        if (PEAR::isError($owner_user)) {
           $owner_user = "<span class='ktError'>" . _kt("Unable to find the document's owner") . "</span>";
        } else {
           $owner_user = $owner_user->getName();
        }
		

        $comparison_modified_user =& User::get($comparison_document->getVersionCreatorId());
        if (PEAR::isError($comparison_modified_user)) {
           $comparison_modified_user = "<span class='ktError'>" . _kt("Unable to find the document's modifier") . "</span>";
        } else {
           $comparison_modified_user = $comparison_modified_user->getName();
        }

        $oWorkflow = KTWorkflowUtil::getWorkflowForDocument($document);
        $oState = KTWorkflowUtil::getWorkflowStateForDocument($document);
        $oComparisonWorkflow = KTWorkflowUtil::getWorkflowForDocument($comparison_document);
        $oComparisonState = KTWorkflowUtil::getWorkflowStateForDocument($comparison_document);
        
        
        $oTemplating =& KTTemplating::getSingleton();        
        $oTemplate = $oTemplating->loadTemplate("kt3/fieldsets/generic_versioned");
        $aTemplateData = array(
            "context" => $this,
            "document_data" => $aDocumentData,
            "document" => $aDocumentData["document"],

	    "title" => $document->getName(),
	    "comparison_title" => $comparison_document->getName(),

	    "filename" => $document->getFileName(),
	    "comparison_filename" => $comparison_document->getFileName(),
			
            "creator" => $creator,
            "creation_date" => $creation_date,
            "owner" => $owner_user,
            
            "last_modified_by" => $modified_user,
            "last_modified_date" => $last_modified_date,
            
            "comparison_last_modified_by" => $comparison_modified_user,
            "comparison_last_modified_date" => $comparison_last_modified_date,
            
            "document_type" => $document_type,
            "comparison_document_type" => $comparison_document_type,
            
            "workflow_state" => $oState,
            "comparison_workflow_state" => $oComparisonState,
            "workflow" => $oWorkflow,
            "comparison_workflow" => $oComparisonWorkflow,
            
            "comparison_document" => $aComparisonData["document"],
        );
        
        return $oTemplate->render($aTemplateData);             
    }
    
    function renderEdit($document_data) {
        global $main; // FIXME remove direct access to $main
        $oField = new KTBaseWidget(_kt("Document Title"),
            sprintf(_kt("The document title is used as the main name of a document throughout %s&trade;."), APP_NAME),
            "generic_title", $document_data["document"]->getName(), $main, true, null, array());
        $aFields = array($oField); // its the only one editable from the basic set (currently).
        
        $oTemplating =& KTTemplating::getSingleton();        
        $oTemplate = $oTemplating->loadTemplate("kt3/fieldsets/simple_editable");
        $aTemplateData = array(
            "context" => $this,
            "fields" => $aFields,
            "title" => _kt("Generic Document Information"),
            "description" => sprintf(_kt("The information in this section is stored by %s&trade; for every document."), APP_NAME),
        );
        return $oTemplate->render($aTemplateData);
    }
}


// The generic object
class SimpleFieldsetDisplay extends KTFieldsetDisplay {
    
    function render($aDocumentData) {
        // we do a fair bit of fetching, etc. in here.
        $document = $aDocumentData["document"];        
       
        // we need to extract the fields.
        $fields =& $this->fieldset->getFields();
        
        
        // we now grab that subset of items which fit in here.
        // FIXME link value -> lookup where appropriate.
        // FIXME probably need to be more careful about the _type_ of field here.
        $fieldset_values = array();
        foreach ($fields as $oField) {
            $val = KTUtil::arrayGet($aDocumentData["field_values"], $oField->getId(), null);
            $fieldset_values[] = array("field" => $oField, "value" => $val, );
        }
        
        
        $oTemplating =& KTTemplating::getSingleton();        
        $oTemplate = $oTemplating->loadTemplate("kt3/fieldsets/simple");
        $aTemplateData = array(
            "context" => $this,
            "document_data" => $aDocumentData,
            "document" => $aDocumentData["document"],
            "fieldset" => $this->fieldset,
            "fieldset_values" => $fieldset_values,
			"description" => $this->fieldset->getDescription(),
        );
        return $oTemplate->render($aTemplateData);        
    }
    
    function renderComparison($aDocumentData, $aComparisonData) {
        // we do a fair bit of fetching, etc. in here.
        $document = $aDocumentData["document"];        
       
        // we need to extract the fields.
        $fields =& $this->fieldset->getFields();
        
        
        // we now grab that subset of items which fit in here.
        // FIXME link value -> lookup where appropriate.
        // FIXME probably need to be more careful about the _type_ of field here.
        $fieldset_values = array();
        foreach ($fields as $oField) {
            $curr_val = KTUtil::arrayGet($aDocumentData["field_values"], $oField->getId(), null);
            $old_val = KTUtil::arrayGet($aComparisonData["field_values"], $oField->getId(), null);
            $fieldset_values[] = array("field" => $oField, "current_value" => $curr_val, "previous_value" => $old_val);
        }
        
        
        $oTemplating =& KTTemplating::getSingleton();        
        $oTemplate = $oTemplating->loadTemplate("kt3/fieldsets/simple_versioned");
        $aTemplateData = array(
            "context" => $this,
            "document_data" => $aDocumentData,
            "document" => $aDocumentData["document"],
            "fieldset" => $this->fieldset,
            "fieldset_values" => $fieldset_values,
        );
        return $oTemplate->render($aTemplateData);        
    }    
    
    function renderEdit($document_data) {
        global $main; // FIXME remove direct access to $main
        
        $aFields = array();
        
        $fields =& $this->fieldset->getFields();
        
        foreach ($fields as $oField) {
            $val = KTUtil::arrayGet($document_data["field_values"], $oField->getId(), null);
            
            $has_errors = KTUtil::arrayGet($document_data['errors'], $oField->getId(),false);
            if ($has_errors !== false) {
                // FIXME when the actual errors (meaningful) are passed out, fix this.
                $errors = array(_kt('The system rejected your value for this field.'));
            } else { 
                $errors = null;
            }
            
            $aFields[] = getWidgetForMetadataField($oField, $val, $main, $errors); // FIXME handle errors
        }
        $fieldset_name = $this->fieldset->getName();
        $fieldset_description = $this->fieldset->getDescription();
        $oTemplating =& KTTemplating::getSingleton();        
        $oTemplate = $oTemplating->loadTemplate("kt3/fieldsets/simple_editable");
        $aTemplateData = array(
            "context" => $this,
            "fields" => $aFields,
            "title" => $fieldset_name,
            "description" => $fieldset_description,
        );
        
        
        return $oTemplate->render($aTemplateData);
    }
    
}


// Handle the conditional case.
class ConditionalFieldsetDisplay extends SimpleFieldsetDisplay {
        
    function renderEdit($document_data) {
        global $main; // FIXME remove direct access to $main
        $oPage =& $main;
        
        // FIXME do this from inside the widgetry mojo.
        $oPage->requireCSSResource('resources/css/kt-treewidget.css');
        
        // FIXME this currently doesn't work, since we use NBM's half-baked Ajax on add/bulk ;)
        $oPage->requireJSResource('resources/js/taillog.js');
        $oPage->requireJSResource('resources/js/conditional_usage.js');
        
        $aFields = array();        
        $fields =& $this->fieldset->getFields();
        $values = array();
        $errors = $document_data['errors'];

        $have_values = false;
        foreach ($fields as $oField) {
            $val = KTUtil::arrayGet($document_data["field_values"], $oField->getId(), null);
            if ($val !== null) {
                $have_values = true;
                
            } 
            
            $values[$oField->getId()] =  $val;
        }   

        
        // now, we need to do some extra work on conditional widgets.
        // how?
        
        $fieldset_name = $this->fieldset->getName();
		$fieldset_description = _kt($this->fieldset->getDescription()); // need a better approach.  how do we handle database-resident translations?
        $fieldset_description .= _kt("Note that the options which are available depends on previous choices within this fieldset.");
        
        // FIXME handle the editable case _with_ values.
        
        if ($have_values) {
			$oTemplating =& KTTemplating::getSingleton();        
			$oTemplate = $oTemplating->loadTemplate("kt3/fieldsets/conditional_editable_values");
			$aTemplateData = array(
				"context" => $this,
				"fields" => $fields =& $this->fieldset->getFields(),
				'fieldset_id' => $this->fieldset->getId(),
				"title" => $fieldset_name,
				"description" => $fieldset_description,
				'values' => $values,
                'errors' => $errors,
			);
			
		    return $oTemplate->render($aTemplateData);
        } // else {
        
        $oTemplating =& KTTemplating::getSingleton();        
        $oTemplate = $oTemplating->loadTemplate("kt3/fieldsets/conditional_editable");
        $aTemplateData = array(
            "context" => $this,
            "field" => $oField, // first field, widget.
            'fieldset_id' => $this->fieldset->getId(),
            "title" => $fieldset_name,
            "description" => $fieldset_description,
        );
        
        return $oTemplate->render($aTemplateData);
    }
    
}

?>