How to get local storage in magento controller to use as available?

Question

I writing a plugin to add condition into beforeLoad function of product collection. I set local storage example js to set local storage:

if (typeof(Storage) !== "undefined") {
    // Store
    localStorage.setItem("inventory", "HAN");
    // Retrieve
    document.getElementById("inventory").innerHTML = localStorage.getItem("inventory");
}

In the magento plugin I want to get inventory value 'HAN' from local storage to use in php class. I wrote the code as below but it can't get inventory in local storage:

    public function beforeLoad(\Magento\Catalog\Model\ResourceModel\Product\Collection $subject, $printQuery = false, $logQuery = false)
    {

        $inventory = "<script>document.write(parseInt(Object.keys(JSON.parse(window.localStorage.getItem('inventory')))))</script>";
        $test = "<script>document.write(localStorage.getItem('inventory'));</script>";

        $joinCondition[] = "e.sku = isi.sku";
        $joinCondition[] = "isi.source_code = '".$inventory."'";
        $joinCondition = implode(' AND ', $joinCondition);
        //var_dump($requestParams);
        if (!$subject->isLoaded()) {
            // you can do your customzation/custom logic with $subject object
            //addFieldToFilter('sku', 'MG-854693')
            $subject->getSelect()->join(
                    [ 'isi' => $subject->getTable('inventory_source_item') ],
                    $joinCondition,
                    []
                );
        }

        return [$printQuery, $logQuery];
    }
}

Please help me, How to get inventory value in php class?

Thank you so much, BienHV

Answer 1

localStorage is a javascript variable.You can get localStorage variable value directly at Controller or Any PHP file. You need to use ajax.

https://stackoverflow.com/a/44834997/2940291

https://www.quora.com/Is-it-possible-to-get-localstorage-key-value-into-a-php-variable-If-so-how-can-we-do-it