CODEWITHSUNDEEP
phpangularlaravellaravel-5.7
Ricky
Ricky

Reputation: 3072

PHP: How to manually stop a method/function execution

I have a method that syncs and updates a database based on an API service. The connection to the API is made via Socket (TCP/IP). The API has a service to return all the ids of the updated items and another to get an item with the updated data. So, i created a sync method that gets the list of updated item ids, iterates the list and updates each item. Since i have to make a socket connection inside the loop to get the item details, this process can take some time depending on the number os items to update. For that reason i would like to allow the client to cancel/stop this process if desired.

Is this possible to accomplish with my current method? Or should i do the items iteration in the client side and change the API to update one item at each request?

The client app is in Angular and the API in PHP.

UPDATE: Example of the current sync method:

public static function syncItems()
{
    $response = -1;

    try {

        //get all updated item ids from api
        $updatedItemIds = self::getUpdatedItemIDs(); //connection to tcp/ip socket

        if (isset($updatedItemIds)) {

            $totalItems = count($updatedItemIds);
            $updatedIems = 0;

            //iterate all ids and get the item details
            foreach ($updatedItemIds as $id) {

                //get updated item data from api
                $updatedItem = self::getItemDetails($id); //connection to tcp/ip socket

                if (isset($updatedItem)) {

                    //get local version o the item
                    $item = Item::find($id);

                    //if item doesn't exist create a new one
                    if (!isset($item)) {

                        $item = new item();

                    }

                    //update item data
                    $item->id = $updatedItem->id
                    $item->name = $updatedItem->name;
                    $item->description = $updatedItem->description;                    

                    //save or update item details in DB
                    if ($item->save()) {
                        //increment updated items
                        $updateditems++;
                    } else {
                        //not saved
                    }
                } else {
                    //not set
                }
            }

            $response = $totalitems - $updateditems;
        }
        else
        {
            //no items to sync...
        }

    } catch (Exception $ex) {

        //ooppsss!
    }

    return $response;
}

Upvotes: 1

Views: 320

Answers (1)

Difster
Difster

Reputation: 3260

I just thought of a solution. You'd need to use sessions. You'd want to set $_SESSION['halt'] = false before the foreach() started.

foreach ($updatedItemIds as $id) {
    if($_SESSION['halt'] === true)) {
    $_SESSION['halt'] = false; //set back to false immediate.
    die;
    }
 //The socket connection would never get made if the above evaluated to true.
            $updatedItem = self::getItemDetails($id); //connection to tcp/ip socket
}

Have a button on the user end pointing to another script which just sets $_SESSION['halt'] == true when clicked.

You could even set a pause in your script to slow it down and give the user more time to react, etc. if you want to.

Upvotes: 1

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