<?php
if (! defined ( 'sugarEntry' ) || ! sugarEntry)
    die ( 'Not A Valid Entry Point' ) ;

/*********************************************************************************
 * SugarCRM is a customer relationship management program developed by
 * SugarCRM, Inc. Copyright (C) 2004-2010 SugarCRM Inc.
 * 
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License version 3 as published by the
 * Free Software Foundation with the addition of the following permission added
 * to Section 15 as permitted in Section 7(a): FOR ANY PART OF THE COVERED WORK
 * IN WHICH THE COPYRIGHT IS OWNED BY SUGARCRM, SUGARCRM DISCLAIMS THE WARRANTY
 * OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
 * 
 * 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 Affero General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU Affero General Public License along with
 * this program; if not, see http://www.gnu.org/licenses or write to the Free
 * Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301 USA.
 * 
 * You can contact SugarCRM, Inc. headquarters at 10050 North Wolfe Road,
 * SW2-130, Cupertino, CA 95014, USA. or at email address contact@sugarcrm.com.
 * 
 * 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 Affero General Public License version 3.
 * 
 * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
 * these Appropriate Legal Notices must retain the display of the "Powered by
 * SugarCRM" logo. If the display of the logo is not reasonably feasible for
 * technical reasons, the Appropriate Legal Notices must display the words
 * "Powered by SugarCRM".
 ********************************************************************************/

/*
 * Abstract class for managing a set of Relationships
 * The Relationships we're managing consist of metadata about relationships, rather than relationship implementations used by the application
 * Relationships defined here are implemented by the build() method to become a relationship that the application can use
 * Note that the modules/Relationships/Relationship.php contains some methods that look similar; remember though that the methods in that file are acting on implemented relationships, not the metadata that we deal with here
 */
class AbstractRelationships
{
    
    static $methods = array ( 'Labels' => 'language' , 'RelationshipMetaData' => 'relationships' , 'SubpanelDefinitions' => 'layoutdefs' , 'Vardefs' => 'vardefs' , 'FieldsToLayouts' => 'layoutfields' ) ;
    static $activities = array ( 'calls' => 'Calls' , 'meetings' => 'Meetings' , 'notes' => 'Notes' , 'tasks' => 'Tasks' , 'emails' => 'Emails' ) ;
    
    protected $relationships = array ( ) ; // array containing all the AbstractRelationship objects that are in this set of relationships
    protected $moduleName ;
    
    /*
     * Find all deployed modules that can participate in a relationship
     * Return a list of modules with associated subpanels
     * @param boolean $includeActivitiesSubmodules True if the list should include Calls, Meetings etc; false if they should be replaced by the parent, Activities
     * @return array    Array of [$module][$subpanel]
     */
    static function findRelatableModules ($includeActivitiesSubmodules = true)
    {
        $relatableModules = array ( ) ;
        
        // add in activities automatically if required
        $relatableModules [ 'Activities' ] [ 'default' ] = translate( 'LBL_DEFAULT' ) ;
            
        // find all deployed modules
        require_once 'modules/ModuleBuilder/Module/StudioBrowser.php' ;
        $browser = new StudioBrowser() ;
        $browser->loadRelatableModules();
        reset($browser->modules) ;

        while ( list( $moduleName , $module ) = each($browser->modules) )
        {
            // do not include the submodules of Activities as already have the parent...
            if (! $includeActivitiesSubmodules && in_array ( $module->module, self::$activities ))
                continue ;

            $relatableModules [ $module->module ] = $module->getProvidedSubpanels() ;
        }
        
        return $relatableModules ;
    
    }

    static function validSubpanel ($filename)
    {
        if (! file_exists ( $filename ))
            return false ;
        
        include $filename ;
        return (isset ( $subpanel_layout ) && (isset ( $subpanel_layout [ 'top_buttons' ] ) && isset ( $subpanel_layout [ 'list_fields' ] ))) ;
    }

    /*
     * Get a list of all relationships (which have not been deleted)
     * @return array    Array of relationship names, ready for use in get()
     */
    function getRelationshipList ()
    {
        $list = array ( ) ;
        foreach ( $this->relationships as $name => $relationship )
        {
            if (! $relationship->deleted ())
                $list [ $name ] = $name ;
        }
        return $list ;
    }

    /*
     * Get a relationship by name
     * @param string $relationshipName  The unique name for this relationship, as returned by $relationship->getName()
     * @return AbstractRelationship or false if $relationshipName is not in this set of relationships
     */
    function get ($relationshipName)
    {
        if (isset ( $this->relationships [ $relationshipName ] ))
        {
            return $this->relationships [ $relationshipName ] ;
        }
        return false ;
    }

    /*
     * Construct a relationship from the information in the $_REQUEST array
     * If a relationship_name is provided, and that relationship is not read only, then modify the existing relationship, overriding the definition with any AbstractRelationship::$definitionkeys entries set in the $_REQUEST
     * Otherwise, create and add a new relationship with the information in the $_REQUEST
     * @return AbstractRelationship
     */
    function addFromPost ()
    {
        $definition = array ( ) ;
        
        require_once 'modules/ModuleBuilder/parsers/relationships/AbstractRelationship.php' ;
        foreach ( AbstractRelationship::$definitionKeys as $key )
        {
            if (! empty ( $_REQUEST [ $key ] ))
            {
                $definition [ $key ] = ($key == 'relationship_type') ? AbstractRelationship::parseRelationshipType ( $_REQUEST [ $key ] ) : $_REQUEST [ $key ] ;
            }
        }
        
        // if this is a change to an existing relationship, and it is not readonly, then delete the old one
        if (! empty ( $_REQUEST [ 'relationship_name' ] ))
        {
            if ($relationship = $this->get ( $_REQUEST [ 'relationship_name' ] ))
            {
                unset( $definition[ 'relationship_name' ] ) ; // in case the related modules have changed; this name is probably no longer appropriate
                if (! $relationship->readonly ())
                    $this->delete ( $_REQUEST [ 'relationship_name' ] ) ;
        }
        }
        
        $newRelationship = RelationshipFactory::newRelationship ( $definition ) ;
        // TODO: error handling in case we get a badly formed definition and hence relationship
        $this->add ( $newRelationship ) ;
        return $newRelationship ;
    }

    /*
     * Add a relationship to the set
     * @param AbstractRelationship $relationship    The relationship to add
     */
    function add ($relationship)
    {
        $name = $this->getUniqueName ( $relationship ) ;
        $relationship->setName ( $name ) ;
        $this->relationships [ $name ] = $relationship ;
    }

    /*
     * Load a set of relationships from a file
     * The saved relationships are stored as AbstractRelationship objects, which isn't the same as the old MBRelationships definition
     * @param string $basepath  Base directory in which to store the relationships information
     * @return Array of AbstractRelationship objects
     */
    protected function _load ($basepath)
    {
        $GLOBALS [ 'log' ]->info ( get_class ( $this ) . ": loading relationships from " . $basepath . '/relationships.php' ) ;
        $objects = array ( ) ;
        if (file_exists ( $basepath . '/relationships.php' ))
        {
            include ($basepath . '/relationships.php') ;
            foreach ( $relationships as $name => $definition )
            {
                // update any pre-5.1 relationships to the new definitions
                // we do this here, rather than when upgrading from 5.0 to 5.1, as modules exported from MB in 5.0 may be loaded into 5.1 at any time
                // note also that since these definitions are only found in the relationships.php working file they only occur for deployed or exported modules, not published then loaded modules
                $definition = $this->_updateRelationshipDefinition( $definition ) ;
                $relationship = RelationshipFactory::newRelationship ( $definition ) ;
                // make sure it has a unique name
                if (! isset( $definition [ 'relationship_name' ] ) )
                {
                    $name = $this->getUniqueName ( $relationship ) ;
                    $relationship->setName ( $name ) ;
                }
                $objects [ $name ] = $relationship ;
            }
        }
        return $objects ;
    }

    /*
     * Save the set of relationships to a file
     * @param string $basepath  Base directory in which to store the relationships information
     */
    protected function _save ($relationships , $basepath)
    {
        $GLOBALS [ 'log' ]->info ( get_class ( $this ) . ": saving relationships to " . $basepath . '/relationships.php' ) ;
        $header = file_get_contents ( 'modules/ModuleBuilder/MB/header.php' ) ;
        
        $definitions = array ( ) ;
        
        foreach ( $relationships as $relationship )
        {
            // if (! $relationship->readonly ())
            $definitions [ $relationship->getName () ] = $relationship->getDefinition () ;
        }
        
        mkdir_recursive ( $basepath ) ;
        // replace any existing relationships.php
        write_array_to_file ( 'relationships', $definitions, $basepath . '/relationships.php', 'w', $header ) ;
    }

    /*
     * Return all known deployed relationships
     * All are set to read-only - the assumption for now is that we can't directly modify a deployed relationship
     * However, if it was created through this AbstractRelationships class a modifiable version will be held in the relationships working file,
     * and that one will override the readonly version in load()
     *
     * TODO: currently we ignore the value of the 'reverse' field in the relationships definition. This is safe to do as only one
     * relationship (products-products) uses it (and there it makes no difference from our POV) and we don't use it when creating new ones
     * @return array Array of $relationshipName => $relationshipDefinition as an array
     */
    protected function getDeployedRelationships ()
    {
        
        $db = DBManagerFactory::getInstance () ;
        $query = "SELECT * FROM relationships WHERE deleted = 0" ;
        $result = $db->query ( $query ) ;
        while ( $row = $db->fetchByAssoc ( $result ) )
        {
            // set this relationship to readonly
            $row [ 'readonly' ] = true ;
            $relationships [ $row [ 'relationship_name' ] ] = $row ;
        }
        
        return $relationships ;
    }

    /*
     * Get a name for this relationship that is unique across all of the relationships we are aware of
     * We make the name unique by simply adding on a suffix until we achieve uniqueness
     * @param AbstractRelationship The relationship object
     * @return string A globally unique relationship name
     */
    protected function getUniqueName ($relationship)
    {
        $allRelationships = $this->getRelationshipList () ;
        $basename = $relationship->getName () ;
        
        if (empty ( $basename ))
        {
            // start off with the proposed name being simply lhs_module_rhs_module
            $definition = $relationship->getDefinition () ;
            $basename = strtolower ( $definition [ 'lhs_module' ] . '_' . $definition [ 'rhs_module' ] ) ;
        }
        
        $name = $basename ;
        $suffix = 1 ;
        while ( isset ( $allRelationships [ $name ] ) )
        {
            $name = $basename . "_" . ( string ) ($suffix ++) ;
        }
        return $name ;
    }
    
    /*
     * Translate the set of relationship objects into files that the Module Loader can work with
     * @param string $basepath          Pathname of the directory to contain the build
     * @param string $installDefPrefix  Pathname prefix for the installdefs, for example for ModuleBuilder use "<basepath>/SugarModules"
     * @param array $relationships      Relationships to implement
     */
    protected function build ($basepath , $installDefPrefix , $relationships )
    {
        global $sugar_config;
    	// keep the relationships data separate from any other build data by ading /relationships to the basepath
        $basepath .= '/relationships' ;

        $installDefs = array ( ) ;
        $compositeAdded = false ;
        foreach ( self::$methods as $method => $key )
        {
            $buildMethod = 'build' . $method ;
            $saveMethod = 'save' . $method ;
            
            foreach ( $relationships as $name => $relationship )
            {
                if (! ($relationship->readonly () || $relationship->deleted ()))
                {
                    if (method_exists ( $relationship, $buildMethod ) && method_exists ( $this, $saveMethod ))
                    {
                        $metadata = $relationship->$buildMethod () ;
                        
                        if (count ( $metadata ) > 0) // don't clutter up the filesystem with empty files...
                        {
                            $GLOBALS [ 'log' ]->debug ( get_class ( $this ) . ": BUILD is running METHOD $saveMethod" ) ;
                            $installDef = $this->$saveMethod ( $basepath, $installDefPrefix, $name, $metadata ) ;
                            
                            // some save methods (e.g., saveRelateFieldDefinition) handle the installDefs internally and so return null

                        
                            if (! is_null ( $installDef ))
                            {
                                foreach ( $installDef as $moduleName => $def )
                                {
                                    $installDefs [ $key ] [ ] = $def ;                                    	                                   
                                }
                            }
                        }
                    }
                
                }
            }
        }
        
        return $installDefs ;
    }

    /*
     * SAVE methods called during the build to translate the metadata provided by each relationship into files for the module installer
     * Note that the installer expects only one file for each module in each section of the manifest - multiple files result in only the last one being implemented!
     */
    
    /*
     * Add a set of labels to the module
     * @param string $basepath              Basepath location for this module
     * @param $installDefPrefix             Pathname prefix for the installdefs, for example for ModuleBuilder use "<basepath>/SugarModules"
     * @param string $relationshipName      Name of this relationship (for uniqueness)
     * @param array $labelDefinitions       Array of System label => Display label pairs
     * @return null Nothing to be added to the installdefs for an undeployed module
     */
    protected function saveLabels ($basepath , $installDefPrefix , $relationshipName , $labelDefinitions)
    {
        global $sugar_config;
        
       	mkdir_recursive ( "$basepath/language" ) ;
    	
       	$headerString = "<?php\n//THIS FILE IS AUTO GENERATED, DO NOT MODIFY\n" ;
        $installDefs = array ( ) ;
        foreach ( $labelDefinitions as $definition )
        {
        	$mod_strings = array();
        	$app_list_strings = array();
        	
        	$out = $headerString;
        	
        	$filename = "{$basepath}/language/{$definition['module']}.php" ;
    	
	    	if (file_exists ( $filename ))
	    		include ($filename);
	    		
            
            //Check for app strings
            $GLOBALS [ 'log' ]->debug ( get_class ( $this ) . "->saveLabels(): saving the following to {$filename}" 
                                      . print_r ( $definition, true ) ) ;
            if ($definition['module'] == 'application') {
            	$app_list_strings[$definition [ 'system_label' ]] = $definition [ 'display_label' ];
            	foreach ($app_list_strings as $key => $val)
            		$out .= override_value_to_string_recursive2('app_list_strings', $key, $val);
            } else {
            	$mod_strings[ $definition [ 'system_label' ]] = $definition [ 'display_label' ];
            	foreach ($mod_strings as $key => $val)
            		$out .= override_value_to_string_recursive2('mod_strings', $key, $val);
            }
            
            $fh = fopen ( $filename, 'w' ) ;
            fputs ( $fh, $out, strlen ( $out ) ) ;
            fclose ( $fh ) ;
            
        	
            foreach($sugar_config['languages'] as $lk => $lv)
            {
            	$installDefs [ $definition [ 'module' ] . "_$lk" ] = array ( 
            		'from' => "{$installDefPrefix}/relationships/language/{$definition [ 'module' ]}.php" , 
            		'to_module' => $definition [ 'module' ] , 
            		'language' => $lk 
            	) ;                                 		
            }
            
            /* do not use the following write_array_to_file method to write the label file - 
             * module installer appends each of the label files together (as it does for all files) 
			 * into a combined label file and so the last $mod_strings is the only one received by the application */
        	// write_array_to_file ( 'mod_strings', array ( $definition [ 'system_label' ] => $definition [ 'display_label' ] ), $filename, "a" ) ;
        }
        
        return $installDefs ;
    }

    /*
     * Translate a set of relationship metadata definitions into files for the Module Loader
     * @param string $basepath              Basepath location for this module
     * @param $installDefPrefix             Pathname prefix for the installdefs, for example for ModuleBuilder use "<basepath>/SugarModules"
     * @param string $relationshipName      Name of this relationship (for uniqueness)
     * @param array $relationshipMetaData   Set of metadata definitions in the form $relationshipMetaData[$relationshipName]
     * @return array $installDefs           Set of new installDefs
     */
    protected function saveRelationshipMetaData ($basepath , $installDefPrefix , $relationshipName , $relationshipMetaData)
    {
        mkdir_recursive ( "$basepath/relationships" ) ;
        
        $installDefs = array ( ) ;
        list ( $rhs_module, $properties ) = each ( $relationshipMetaData ) ;
        $filename = "$basepath/relationships/{$relationshipName}MetaData.php" ;
        $GLOBALS [ 'log' ]->debug ( get_class ( $this ) . "->saveRelationshipMetaData(): saving the following to {$filename}" . print_r ( $properties, true ) ) ;
        write_array_to_file ( 'dictionary["' . $relationshipName . '"]', $properties, "{$filename}", 'w' ) ;
        $installDefs [ $relationshipName ] = array ( /*'module' => $rhs_module , 'module_vardefs' => "<basepath>/Vardefs/{$relationshipName}.php" ,*/ 'meta_data' => "{$installDefPrefix}/relationships/relationships/{$relationshipName}MetaData.php" ) ;
        
        return $installDefs ;
    }

    /*
     * Translate a set of subpanelDefinitions into files for the Module Loader
     * @param string $basepath              Basepath location for this module
     * @param $installDefPrefix             Pathname prefix for the installdefs, for example for ModuleBuilder use "<basepath>/SugarModules"
     * @param array $subpanelDefinitions    Set of subpanel definitions in the form $subpanelDefinitions[$for_module][]
     * @return array $installDefs           Set of new installDefs
     */
    protected function saveSubpanelDefinitions ($basepath , $installDefPrefix , $relationshipName , $subpanelDefinitions)
    {
        mkdir_recursive ( "$basepath/layoutdefs/" ) ;
        
        foreach ( $subpanelDefinitions as $moduleName => $definitions )
        {
            $filename = "$basepath/layoutdefs/{$relationshipName}_{$moduleName}.php" ;
            $out =  "<?php\n// created: " . date('Y-m-d H:i:s') . "\n";
            foreach ( $definitions as $definition )
            {
                $GLOBALS [ 'log' ]->debug ( get_class ( $this ) . "->saveSubpanelDefinitions(): saving the following to {$filename}" . print_r ( $definition, true ) ) ;
            	if (empty($definition ['get_subpanel_data']) || $definition ['subpanel_name'] == 'history' ||  $definition ['subpanel_name'] == 'activities') {
               		$definition ['get_subpanel_data'] = $definition ['subpanel_name'];
               	}
               	$out .= '$layout_defs["' . $moduleName . '"]["subpanel_setup"]["' . $definition ['get_subpanel_data'] . '"] = ' 
               	      . var_export_helper($definition) . ";\n";
            }
            file_put_contents($filename, $out);
            $installDefs [ $moduleName ] = array ( 'from' => "{$installDefPrefix}/relationships/layoutdefs/{$relationshipName}_{$moduleName}.php" , 'to_module' => $moduleName ) ;
        }
        return $installDefs ;
    }

    /*
     * Translate a set of linkFieldDefinitions into files for the Module Loader
     * Note that the Module Loader will only accept one entry in the vardef section of the Manifest for each module
     * This means that we cannot simply build a file for each relationship as relationships that involve the same module will end up overwriting each other when installed
     * So we have to append the vardefs for each relationship to a single file for each module
     * @param string $basepath              Basepath location for this module
     * @param $installDefPrefix             Pathname prefix for the installdefs, for example for ModuleBuilder use "<basepath>/SugarModules"
     * @param string $relationshipName      Name of this relationship (for uniqueness)
     * @param array $linkFieldDefinitions   Set of link field definitions in the form $linkFieldDefinitions[$for_module]
     * @return array $installDefs           Set of new installDefs
     */
    protected function saveVardefs ($basepath , $installDefPrefix , $relationshipName , $vardefs)
    {
        mkdir_recursive ( "$basepath/vardefs/" ) ;
        $GLOBALS [ 'log' ]->debug ( get_class ( $this ) . "->saveVardefs(): vardefs =" . print_r ( $vardefs, true ) ) ;
        
        foreach ( $vardefs as $moduleName => $definitions )
        {
            // find this module's Object name - the object name, not the module name, is used as the key in the vardefs...
            if (isset ( $GLOBALS [ 'beanList' ] [ $moduleName ] ))
            {
                $module = get_module_info ( $moduleName ) ;
                $object = $module->object_name ;
            } else
            {
                $object = $moduleName ;
            }
            
            $relName = $moduleName;
            foreach ( $definitions as $definition )
            {
            	if (!empty($definition['relationship']))
            	{
            		$relName = $definition['relationship'];
            		break;
            	}
            }
            
            $filename = "$basepath/vardefs/{$relName}_{$moduleName}.php" ;
            
            $out =  "<?php\n// created: " . date('Y-m-d H:i:s') . "\n";
            foreach ( $definitions as $definition )
            {
                $GLOBALS [ 'log' ]->debug ( get_class ( $this ) . "->saveVardefs(): saving the following to {$filename}" . print_r ( $definition, true ) ) ;
               	$out .= '$dictionary["' . $object . '"]["fields"]["' . $definition [ 'name' ] . '"] = '
               		  . var_export_helper($definition) . ";\n";
            }
            file_put_contents($filename, $out);
            
            $installDefs [ $moduleName ] = array ( 
            	'from' => "{$installDefPrefix}/relationships/vardefs/{$relName}_{$moduleName}.php" , 
            	'to_module' => $moduleName 
            ) ;
        }
        
        $GLOBALS [ 'log' ]->debug ( get_class ( $this ) . "->saveVardefs(): installDefs =" . print_r ( $installDefs, true ) ) ;
        
        return $installDefs ;
    
    }

    /*
     * Determine if we're dealing with a deployed or undeployed module based on the name
     * Undeployed modules are those known to ModuleBuilder; the twist is that the deployed names of modulebuilder modules are keyname_modulename not packagename_modulename
     * and ModuleBuilder doesn't have any accessor methods based around keys, so we must convert keynames to packagenames
     * @param $deployedName Name of the module in the deployed form - that is, keyname_modulename or modulename
     * @return array ('moduleName'=>name, 'packageName'=>package) if undeployed, ('moduleName'=>name) if deployed
     */
    static function parseDeployedModuleName ($deployedName)
    {
        require_once 'modules/ModuleBuilder/MB/ModuleBuilder.php' ;
        $mb = new ModuleBuilder ( ) ;
        
        $packageName = '' ;
        $moduleName = $deployedName ;
        
        foreach ( $mb->getPackageList () as $name )
        {
            // convert the keyName into a packageName, needed for checking to see if this is really an undeployed module, or just a module with a _ in the name...
            $package = $mb->getPackage ( $name ) ; // seem to need to call getPackage twice to get the key correctly... TODO: figure out why...
            $key = $mb->getPackage ( $name )->key ;
            if (strlen ( $key ) < strlen ( $deployedName ))
            {
                $position = stripos ( $deployedName, $key ) ;
                $moduleName = trim( substr( $deployedName , strlen($key) ) , '_' ); //use trim rather than just assuming that _ is between packageName and moduleName in the deployedName
                if ( $position !== false && $position == 0 && (isset ( $mb->packages [ $name ]->modules [ $moduleName ] )))
                {
                    $packageName = $name ;
                    break ;
                }
            }
        }
        
        if (! empty ( $packageName ))
        {
            return array ( 'moduleName' => $moduleName , 'packageName' => $packageName ) ;
        } else
        {
            return array ( 'moduleName' => $deployedName ) ;
        }
    }


}