<?php
/**
 *
 * SugarCRM Community Edition is a customer relationship management program developed by
 * SugarCRM, Inc. Copyright (C) 2004-2013 SugarCRM Inc.
 *
 * SuiteCRM is an extension to SugarCRM Community Edition developed by SalesAgility Ltd.
 * Copyright (C) 2011 - 2017 SalesAgility Ltd.
 *
 * 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 and "Supercharged by SuiteCRM" logo. If the display of the logos is not
 * reasonably feasible for technical reasons, the Appropriate Legal Notices must
 * display the words "Powered by SugarCRM" and "Supercharged by SuiteCRM".
 */

if (!defined('sugarEntry') || !sugarEntry) {
    die('Not A Valid Entry Point');
}

require_once 'modules/ModuleBuilder/parsers/constants.php';
require_once 'modules/ModuleBuilder/parsers/views/History.php';

/**
 * Abstract base clase for Parser Implementations (using a Bridge Pattern)
 * The Implementations hide the differences between :
 * - Deployed modules (such as OOB modules and deployed ModuleBuilder modules) that are located in the /modules directory and have metadata in modules/<name>/metadata and in the custom directory
 * - WIP modules which are being worked on in ModuleBuilder and that are located in custom
 */
abstract class AbstractMetaDataImplementation
{
    /**
     * @var string $_view ;
     */
    protected $_view;

    /**
     * @var string $_viewName
     */
    protected $_viewName;

    /**
     * @var string $_moduleName
     */
    protected $_moduleName;
    /**
     * @var array $_viewdefs
     */
    protected $_viewdefs;

    /**
     * @var array $_originalViewdefs
     */
    protected $_originalViewdefs = array();

    /**
     * @var array $_fielddefs
     */
    protected $_fielddefs;

    /**
     * @var string $_sourceFilename
     * the name of the file from which we loaded the definition we're working on - needed when we come to write out
     * the historical record would like this to be a constant, but alas, constants cannot contain arrays...
     */
    protected $_sourceFilename = '';

    /**
     * @var array $_fileVariables
     */
    protected $_fileVariables = array(
        MB_DASHLETSEARCH => 'dashletData',
        MB_DASHLET => 'dashletData',
        MB_POPUPSEARCH => 'popupMeta',
        MB_POPUPLIST => 'popupMeta',
        MB_LISTVIEW => 'listViewDefs',
        MB_BASICSEARCH => 'searchdefs',
        MB_ADVANCEDSEARCH => 'searchdefs',
        MB_EDITVIEW => 'viewdefs',
        MB_DETAILVIEW => 'viewdefs',
        MB_QUICKCREATE => 'viewdefs',
    );

    /**
     * @var array $_originalViewTemplateDefs
     */
    protected $_originalViewTemplateDefs;

    /**
     * @var array $_variables
     */
    protected $_variables;

    /**
     * Getters for the definitions loaded by the Constructor
     * @return array
     */
    public function getViewdefs()
    {
        $GLOBALS['log']->debug(get_class($this) . '->getViewdefs:' . print_r($this->_viewdefs, true));

        return $this->_viewdefs;
    }

    /**
     * @return array
     */
    public function getOriginalViewdefs()
    {
        return $this->_originalViewdefs;
    }

    /**
     * @return array
     */
    public function getOriginalViewTemplateDefinitions()
    {
        return $this->_originalViewTemplateDefs;
    }

    /**
     * @return mixed
     */
    public function getFielddefs()
    {
        return $this->_fielddefs;
    }

    /**
     * Obtain a new accessor for the history of this layout
     * Ideally the History object would be a singleton; however given the use case (modulebuilder/studio) it's unlikely to be an issue
     *
     * @return mixed
     */
    public function getHistory()
    {
        return $this->_history;
    }

    /**
     * Load a layout from a file, given a filename
     * Doesn't do any preprocessing on the viewdefs - just returns them as found for other classes to make sense of
     * @param string $filename       The full path to the file containing the layout
     * @return array                The layout, null if the file does not exist
     */
    protected function _loadFromFile($filename)
    {
        // BEGIN ASSERTIONS
        if (!file_exists($filename)) {
            return null;
        }
        // END ASSERTIONS
        $GLOBALS['log']->debug(get_class($this) . "->_loadFromFile(): reading from " . $filename);
        require $filename; // loads the viewdef - must be a require not require_once to ensure can reload if called twice in succession

        // Check to see if we have the module name set as a variable rather than embedded in the $viewdef array
        // If we do, then we have to preserve the module variable when we write the file back out
        // This is a format used by ModuleBuilder templated modules to speed the renaming of modules
        // OOB Sugar modules don't use this format

        $moduleVariables = array('module_name', '_module_name', 'OBJECT_NAME', '_object_name');

        $variables = array();
        foreach ($moduleVariables as $name) {
            if (isset ($$name)) {
                $variables [$name] = $$name;
            }
        }

        if(isset($viewdefs[$this->_moduleName])) {
            // get view name by performing a case insensitive search on each key
            $key = '';
            foreach ($viewdefs[$this->_moduleName] as $viewdefKey => $viewdefVal) {
                if(stristr($viewdefKey, $this->_view) !== false) {
                    $key = $viewdefKey;
                    break;
                }
            }
            if(!empty($key) && isset($viewdefs[$this->_moduleName][$key]['templateMeta'])) {
                $this->_viewName = $key;
                $this->_originalViewTemplateDefs = $viewdefs[$this->_moduleName][$key]['templateMeta'];
            } else {
                $this->_originalViewTemplateDefs = array();
            }
        }

        // Extract the layout definition from the loaded file - the layout definition is held under a variable name that varies between the various layout types (e.g., listviews hold it in listViewDefs, editviews in viewdefs)
        $viewVariable = $this->_fileVariables [$this->_view];
        $defs = $$viewVariable;

        // Now tidy up the module name in the viewdef array
        // MB created definitions store the defs under packagename_modulename and later methods that expect to find them under modulename will fail

        if (isset ($variables ['module_name'])) {
            $mbName = $variables ['module_name'];
            if ($mbName != $this->_moduleName) {
                $defs [$this->_moduleName] = $defs [$mbName];
                unset ($defs [$mbName]);
            }
        }
        $this->_variables = $variables;
        // now remove the modulename preamble from the loaded defs
        reset($defs);
        $temp = each($defs);

        $GLOBALS['log']->debug(get_class($this) . "->_loadFromFile: returning " . print_r($temp['value'], true));

        return $temp['value']; // 'value' contains the value part of 'key'=>'value' part
    }

    /**
     * @param $filename
     * @param $mod
     * @param $view
     * @param bool $forSave
     * @return array|null
     */
    protected function _loadFromPopupFile($filename, $mod, $view, $forSave = false)
    {
        // BEGIN ASSERTIONS
        if (!file_exists($filename)) {
            return null;
        }
        // END ASSERTIONS
        $GLOBALS['log']->debug(get_class($this) . "->_loadFromFile(): reading from " . $filename);

        if (!empty($mod)) {
            $oldModStrings = $GLOBALS['mod_strings'];
            $GLOBALS['mod_strings'] = $mod;
        }

        require $filename; // loads the viewdef - must be a require not require_once to ensure can reload if called twice in succession
        $viewVariable = $this->_fileVariables [$this->_view];
        $defs = $$viewVariable;
        if (!$forSave) {
            //Now we will unset the reserve field in pop definition file.
            $limitFields = PopupMetaDataParser::$reserveProperties;
            foreach ($limitFields as $v) {
                if (isset($defs[$v])) {
                    unset($defs[$v]);
                }
            }
            if (isset($defs[PopupMetaDataParser::$defsMap[$view]])) {
                $defs = $defs[PopupMetaDataParser::$defsMap[$view]];
            } else {
                //If there are no defs for this view, grab them from the non-popup view
                if ($view == MB_POPUPLIST) {
                    $this->_view = MB_LISTVIEW;
                    $defs = $this->_loadFromFile($this->getFileName(MB_LISTVIEW, $this->_moduleName,
                        MB_CUSTOMMETADATALOCATION));
                    if ($defs == null) {
                        $defs = $this->_loadFromFile($this->getFileName(MB_LISTVIEW, $this->_moduleName,
                            MB_BASEMETADATALOCATION));
                    }
                    $this->_view = $view;
                } else {
                    if ($view == MB_POPUPSEARCH) {
                        $this->_view = MB_ADVANCEDSEARCH;
                        $defs = $this->_loadFromFile($this->getFileName(MB_ADVANCEDSEARCH, $this->_moduleName,
                            MB_CUSTOMMETADATALOCATION));
                        if ($defs == null) {
                            $defs = $this->_loadFromFile($this->getFileName(MB_ADVANCEDSEARCH, $this->_moduleName,
                                MB_BASEMETADATALOCATION));
                        }

                        if (isset($defs['layout']) && isset($defs['layout']['advanced_search'])) {
                            $defs = $defs['layout']['advanced_search'];
                        }
                        $this->_view = $view;
                    }
                }
                if ($defs == null) {
                    $defs = array();
                }
            }
        }

        $this->_variables = array();
        if (!empty($oldModStrings)) {
            $GLOBALS['mod_strings'] = $oldModStrings;
        }

        return $defs;
    }

    /**
     * Save a layout to a file
     * Must be the exact inverse of _loadFromFile
     * Obtains the additional variables, such as module_name, to include in beginning of the file (as required by ModuleBuilder) from the internal variable _variables, set in the Constructor
     * @param string $filename       The full path to the file to contain the layout
     * @param array $defs        	Array containing the layout definition; the top level should be the definition itself; not the modulename or viewdef= preambles found in the file definitions
     * @param boolean $useVariables	Write out with placeholder entries for module name and object name - used by ModuleBuilder modules
     * @param bool $forPopup
     */
    protected function _saveToFile($filename, $defs, $useVariables = true, $forPopup = false)
    {
        if (file_exists($filename)) {
            unlink($filename);
        }

        mkdir_recursive(dirname($filename));

        $useVariables = (count($this->_variables) > 0) && $useVariables; // only makes sense to do the variable replace if we have variables to replace...

        // create the new metadata file contents, and write it out
        $out = "<?php\n";
        if ($useVariables) {
            // write out the $<variable>=<modulename> lines
            foreach ($this->_variables as $key => $value) {
                $out .= "\$$key = '" . $value . "';\n";
            }
        }

        $viewVariable = $this->_fileVariables [$this->_view];
        if ($forPopup) {
            $out .= "\$$viewVariable = \n" . var_export_helper($defs);
        } else {
            $out .= "\$$viewVariable [" . (($useVariables) ? '$module_name' : "'$this->_moduleName'") . "] = \n" . var_export_helper($defs);
        }

        $out .= ";\n";

        if(!empty($this->_originalViewTemplateDefs)) {
            $templateMeta = var_export($this->_originalViewTemplateDefs, true);
            if(!empty($templateMeta)) {
                $out .= '$viewdefs[\'' . $this->_moduleName . '\'][\''. $this->_viewName . '\'][\'templateMeta\'] = '.$templateMeta;
            }
        }

        $out .= ";\n?>\n";


        if (sugar_file_put_contents($filename, $out) === false) {
            $GLOBALS ['log']->fatal(get_class($this) . ": could not write new viewdef file " . $filename);
        }
    }

    /**
     * Fielddefs are obtained from two locations:
     *
     * 1. The starting point is the module's fielddefs, sourced from the Bean
     * 2. Second comes any overrides from the layouts themselves. Note though that only visible fields are included in a layoutdef, which
     * 	  means fields that aren't present in the current layout may have a layout defined in a lower-priority layoutdef, for example, the base layoutdef
     *
     * Thus to determine the current fielddef for any given field, we take the fielddef defined in the module's Bean and then override with first the base layout,
     * then the customlayout, then finally the working layout...
     *
     * The complication is that although generating these merged fielddefs is naturally a method of the implementation, not the parser,
     * we therefore lack knowledge as to which type of layout we are merging - EditView or ListView. So we can't use internal knowledge of the
     * layout to locate the field definitions. Instead, we need to look for sections of the layout that match the template for a field definition...
     *
     * @param $fielddefs
     * @param $layout
     */
    function _mergeFielddefs(&$fielddefs, $layout)
    {
        foreach ($layout as $key => $def) {

            if ((string)$key == 'templateMeta') {
                continue;
            }

            if (is_array($def)) {
                if (isset ($def ['name']) && !is_array($def ['name'])) // found a 'name' definition, that is not the definition of a field called name :)
                {
                    // if this is a module field, then merge in the definition, otherwise this is a new field defined in the layout, so just take the definition
                    $fielddefs [$def ['name']] = (isset ($fielddefs [$def ['name']])) ? array_merge($fielddefs [$def ['name']],
                        $def) : $def;
                } else {
                    if (isset ($def ['label']) || isset ($def ['vname']) || isset($def ['widget_class'])) // dealing with a listlayout which lacks 'name' keys, but which does have 'label' keys
                    {
                        $key = strtolower($key);
                        $fielddefs [$key] = (isset ($fielddefs [$key])) ? array_merge($fielddefs [$key], $def) : $def;
                    } else {
                        $this->_mergeFielddefs($fielddefs, $def);
                    }
                }
            }
        }

    }

    /**
     * @param string $view
     * @param string $moduleName
     * @param string $type
     * @return mixed
     */
    abstract public function getFileName($view , $moduleName , $type = MB_CUSTOMMETADATALOCATION);

}

