<?php \r\n\r\n \/\/ this will take care of the first task\r\n $objFinder = new FilesFinder();\r\n\r\n \/\/ this will return the statistic objects \r\n $files = $objFinder->getFiles();\r\n\r\n \/\/ object for parsing and inserting data from files\r\n $objParser = new XLSXParser(); \r\n $objParser->insertDataFrom($files);\r\n\r\n \/\/ save the statistics and move the files to excel files runned folder\r\n $objStatistics = new Statistics();\r\n $objStatistics->insertStatistics($files);<\/pre>\nI’m not a very big fan of this, so, a solution to avoid it, will be to wrap the three objects into a list that executes itself. Let’s take a look at the “final” file that takes care of the request:<\/p>\n
\/\/ get sequence of classes that are needed for parsing job\r\n $chain = ChainBuilder::getInstance()->getChain();\r\n $chain->execute();<\/pre>\nTo explain the first line, ChainBuilder<\/code> is the object responsible for wrapping all three objects (FilesFinder<\/code>, XLSXParser<\/code>, Statistics<\/code>) in just one object (see the bellow print of the object).<\/p>\nFilesFinder Object\r\n(\r\n [_successor:protected] => XLSXParser Object\r\n (\r\n [_successor:protected] => Statistics Object\r\n (\r\n )\r\n\r\n )\r\n )\r\n)<\/pre>\nEvery one of those three classes extend a fourth abstract class, called ChainElement<\/code> (you will find the code for this class below) .<\/p>\n <\/p><\/blockquote>\n
<?php \r\n\/**\r\n * Base class for every object part of the sequence \r\n * of objects that need to be executed\r\n *\/\r\nabstract class ChainElement\r\n{\r\n \/**\r\n * the next object that needs to run \r\n * @var ChainElement\r\n *\/\r\n protected $_successor = null;\r\n\r\n \/**\r\n * method for setting the next object that needs to be executed\r\n * @param ChainElement $objSuccessor\r\n *\/\r\n public function setSuccessor(ChainElement $objSuccessor)\r\n {\r\n $this->_successor = $objSuccessor;\r\n }\r\n\r\n \/**\r\n * getter for the next object that needs to be executed\r\n * @return ChainElement\r\n *\/\r\n public function getSuccessor() \r\n {\r\n return $this->_successor;\r\n }\r\n\r\n \/**\r\n * abstract function that every object part of the sequence\r\n * needs to overwrite \r\n *\/\r\n abstract function execute();\r\n\r\n \/**\r\n * method to determine if we have a successor and if we have \r\n * call his execute method\r\n *\/\r\n public function executeSuccessor()\r\n {\r\n if(!is_null($this->_successor) && is_object($this->_successor) === true)\r\n {\r\n $this->_successor->execute();\r\n }\r\n }\r\n}<\/pre>\nAs you can see, the FilesFinder<\/code> class, the XSLXParser<\/code> class and the Statistics<\/code> class need to overwrite the abstract method execute()<\/code> from ChainElement<\/code>.<\/p>\nAnother requirement for this is that, at the end of each execute()<\/code> method, the executeSuccessor()<\/code> method should be called, in order to do the next part of the job.<\/p>\nTo explain even better, objFinder<\/code> will make the call, at the end of execute()<\/code> method, that will invoke the next object; the objXLSXParser<\/code> will run its execute()<\/code> method, that will invoke the objStatisctics’s execute()<\/code> method.<\/p>\nAs a result of this approach, I can always add a new object in the sequence, without compromising the\u00a0existing code. For example, I can add an objCleaner<\/code> (doesn’t matter what it does) at wherever in the sequence, the object will need to extend the ChainElement<\/code> and overwrite the execute()<\/code> method .<\/p>\nAs an addition to this classes, if you will ever use this, I suggest you make another class (mine is called ChainParams<\/code>), that will implement the Singleton<\/code> design pattern, which should hold the “communication” objects from one ChainElement<\/code> to another.<\/p>\nHope you’ve \u00a0enjoyed the post!<\/p>\n","protected":false},"excerpt":{"rendered":"
Today’s article is meant to show you how to go from plain-text tasks to a collection of classes that are […]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[82],"tags":[175,184,194,196,199],"yst_prominent_words":[1388,1399,1398,1397,1396,1395,1394,1393,1392,1391,415,1387,1386,1351,1147,1025,1014,1013,426],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/intelligentbee.com\/blog\/wp-json\/wp\/v2\/posts\/490"}],"collection":[{"href":"https:\/\/intelligentbee.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/intelligentbee.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/intelligentbee.com\/blog\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/intelligentbee.com\/blog\/wp-json\/wp\/v2\/comments?post=490"}],"version-history":[{"count":7,"href":"https:\/\/intelligentbee.com\/blog\/wp-json\/wp\/v2\/posts\/490\/revisions"}],"predecessor-version":[{"id":132725,"href":"https:\/\/intelligentbee.com\/blog\/wp-json\/wp\/v2\/posts\/490\/revisions\/132725"}],"wp:attachment":[{"href":"https:\/\/intelligentbee.com\/blog\/wp-json\/wp\/v2\/media?parent=490"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/intelligentbee.com\/blog\/wp-json\/wp\/v2\/categories?post=490"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/intelligentbee.com\/blog\/wp-json\/wp\/v2\/tags?post=490"},{"taxonomy":"yst_prominent_words","embeddable":true,"href":"https:\/\/intelligentbee.com\/blog\/wp-json\/wp\/v2\/yst_prominent_words?post=490"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}