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Edit File: add-to-cart-quantity-btn.js

/**
 * WooCommerce quantity buttons.
 *
 * @since x.x.x
 */

window.addEventListener( "load", function(e) {
    astrawpWooQuantityButtons();
    quantityInput();
});

// Here we are selecting the node that will be observed for mutations.
const astraminiCarttargetNodes = document.querySelectorAll(".ast-site-header-cart");

astraminiCarttargetNodes.forEach(function(astraminiCarttargetNode) {
    if (astraminiCarttargetNode != null) {
        const config = { attributes: false, childList: true, subtree: true };
    
        const astraMinicartObserver = () => {
            astrawpWooQuantityButtons();
            quantityInput();
        };
    
        const observer = new MutationObserver(astraMinicartObserver);
        observer.observe(astraminiCarttargetNode, config);
    }
});

/**This comment explains that in order to refresh the wc_fragments_refreshed event when an AJAX call is made, jQuery is used to update the quantity button.
 * Here plain JavaScript may not be able to trigger the wc_fragments_refreshed event in the same way,
 * hence the need to use jQuery
*/
jQuery( function( $ ) {
    $( document.body ).on( 'wc_fragments_refreshed', function() {
        astrawpWooQuantityButtons();
        quantityInput();
    });
});

/**
 * Astra WooCommerce Quantity Buttons.
 */
function astrawpWooQuantityButtons( $quantitySelector ) {

var $cart = document.querySelector( '.woocommerce div.product form.cart' );

if ( ! $quantitySelector ) {
        $quantitySelector = '.qty';
    }

$quantityBoxesWrap = document.querySelectorAll( 'div.quantity:not(.elementor-widget-woocommerce-cart .quantity):not(.buttons_added), td.quantity:not(.elementor-widget-woocommerce-cart .quantity):not(.buttons_added)' );

for ( var i = 0; i < $quantityBoxesWrap.length; i++ ) {

var e = $quantityBoxesWrap[i];

var $quantityBoxes = e.querySelector( $quantitySelector );

if ( $quantityBoxes && 'date' !== $quantityBoxes.getAttribute( 'type' ) && 'hidden' !== $quantityBoxes.getAttribute( 'type' ) ) {

// Add plus and minus icons.
            $qty_parent = $quantityBoxes.parentElement;
            $qty_parent.classList.add( 'buttons_added' );

const minusBtn = `<span class="screen-reader-text">${ astra_qty_btn.minus_qty }</span><a href="javascript:void(0)" id="minus_qty-${ i }" class="minus %s">-</a>`;
            const plusBtn = `<span class="screen-reader-text">${ astra_qty_btn.plus_qty }</span><a href="javascript:void(0)" id="plus_qty-${ i }" class="plus %s">+</a>`;

if ( 'vertical-icon' === astra_qty_btn.style_type ) {
                $qty_parent.classList.add( 'ast-vertical-style-applied' );
                $quantityBoxes.classList.add( 'vertical-icons-applied' );
                $qty_parent.insertAdjacentHTML(
                    'beforeend',
                    minusBtn.replace( '%s', 'ast-vertical-icon' ) + plusBtn.replace( '%s', 'ast-vertical-icon' )
                );
            } else {
                let styleTypeClass = '';
                if ( 'no-internal-border' === astra_qty_btn.style_type ) {
                    $quantityBoxes.classList.add( 'ast-no-internal-border' );
                    styleTypeClass = 'no-internal-border';
                }
                $qty_parent.insertAdjacentHTML( 'afterbegin', minusBtn.replace( '%s', styleTypeClass ) );
                $qty_parent.insertAdjacentHTML( 'beforeend', plusBtn.replace( '%s', styleTypeClass ) );
            }
            $quantityEach = document.querySelectorAll( 'input' + $quantitySelector + ':not(.product-quantity)' );

for ( var j = 0; j < $quantityEach.length; j++ ) {

var el = $quantityEach[j];

var $min = el.getAttribute( 'min' );

if ( $min && $min > 0 && parseFloat( el.value ) < $min ) {
                    el.value = $min;
                }
            }

// Quantity input.
            let objbody = document.getElementsByTagName('BODY')[0];
            let cart = document.getElementsByClassName('cart')[0];

if (objbody.classList.contains('single-product') && !cart.classList.contains('grouped_form')) {
                let quantityInput = document.querySelector('.woocommerce input[type=number].qty');
                // Check for single product page.
                if (quantityInput) {
                    quantityInput.addEventListener('keyup', function () {
                        let qtyVal = quantityInput.value;
                        quantityInput.value = qtyVal;
                    });
                }
            }

var plus_minus_obj = e.querySelectorAll( '.plus, .minus' );

for ( var l = 0; l < plus_minus_obj.length; l++ ) {

var pm_el = plus_minus_obj[l];

pm_el.addEventListener( "click", function(ev) {

// Quantity.
                    var $quantityBox;

$quantityBox = ev.target.parentElement.querySelector( $quantitySelector );

// Get values.
                    var $currentQuantity = parseFloat( $quantityBox.value ),
                    $maxQuantity = parseFloat( $quantityBox.getAttribute( 'max' ) ),
                    $minQuantity = parseFloat( $quantityBox.getAttribute( 'min' ) ),
                    $step = parseFloat( $quantityBox.getAttribute( 'step' ) ),
                    checkStepInteger = Number.isInteger( $step ),
                    finalValue;

// Fallback default values on falsy values like '' and NaN.
                    if ( ! $currentQuantity ) {
                        $currentQuantity = 0;
                    }
                    if ( ! $maxQuantity ) {
                        $maxQuantity = '';
                    }

if ( ! $minQuantity ) {
                        $minQuantity = 0;
                    }
                    if ( ! $step ) {
                        $step = 1;
                    }

// Change the value.
                    if ( ev.target.classList.contains( 'plus' ) ) {

if ( $maxQuantity && ( $maxQuantity === $currentQuantity || $currentQuantity > Number( $maxQuantity ) ) ) {
                            $quantityBox.value = $maxQuantity;
                        } else {
                            finalValue = $currentQuantity + parseFloat( $step );
                            $quantityBox.value = checkStepInteger ? finalValue : ( finalValue ).toFixed(1);
                        }

} else {

if ( $minQuantity && ( $minQuantity === $currentQuantity || $currentQuantity < $minQuantity ) ) {
                            $quantityBox.value = $minQuantity;
                        } else if ( $currentQuantity > 0 ) {
                            finalValue = $currentQuantity - parseFloat( $step );
                            $quantityBox.value = checkStepInteger ? finalValue : ( finalValue ).toFixed(1);
                        }

}

// Trigger the change event on the input.
                    var changeEvent = new Event('change', { bubbles: true });
                    $quantityBox.dispatchEvent(changeEvent);

// Trigger change event.
                    var update_cart_btn = document.getElementsByName("update_cart");
                    if (update_cart_btn.length > 0) {
                        for ( var btn = 0; btn < update_cart_btn.length; btn++ ) {
                            update_cart_btn[btn].disabled = false;
                            update_cart_btn[btn].click();
                        }
                    }
                    
                    const quantity = $quantityBox.value;
                    const itemHash = $quantityBox.getAttribute('name').replace(/cart\[([\w]+)\]\[qty\]/g, '$1');

sendAjaxQuantityRequest(ev.currentTarget, quantity, itemHash)

}, false);
            }
        }
    }
}

function sendAjaxQuantityRequest(currentTarget, quantity, itemHash ) {

// Send AJAX request from mini cart.
    const miniCart = currentTarget.closest( '.woocommerce-mini-cart' );

if ( miniCart && astra && astra.single_product_qty_ajax_nonce && astra.ajax_url ) {

let qtyNonce = astra.single_product_qty_ajax_nonce;

miniCart.classList.add('ajax-mini-cart-qty-loading');

// Creating a XMLHttpRequest object.
        let xhrRequest = new XMLHttpRequest();
        xhrRequest.open( 'POST', astra.ajax_url, true );

// Send the proper header information along with the request
        xhrRequest.setRequestHeader( "Content-Type", "application/x-www-form-urlencoded" );

xhrRequest.send( 'action=astra_add_cart_single_product_quantity&hash=' + itemHash + '&quantity=' + quantity + '&qtyNonce=' + qtyNonce );

xhrRequest.onload = function () {
            if ( xhrRequest.readyState == XMLHttpRequest.DONE ) {   // XMLHttpRequest.DONE == 4
                if ( 200 <= xhrRequest.status || 400 <= xhrRequest.status ) {
                    // Trigger event so themes can refresh other areas.
                    var event = document.createEvent( 'HTMLEvents' );
                    event.initEvent( 'wc_fragment_refresh', true, false );
                    document.body.dispatchEvent(event);

setTimeout(() => {
                        miniCart.classList.remove('ajax-mini-cart-qty-loading');
                    }, 500);

if ( typeof wc_add_to_cart_params === 'undefined' ) {
                        return;
                    }
                }
            }
        };
    }

}

let typingTimer; //timer identifier
let doneTypingInterval = 500;

function quantityInput() {
    const quantityInputContainer = document.querySelector('.woocommerce-mini-cart');

if( quantityInputContainer ) {
        const quantityInput = document.querySelectorAll('.input-text.qty');

quantityInput.forEach( single => {
            single.addEventListener('keyup', (e) => {
                clearTimeout(typingTimer);
                if (single.value) {
                    typingTimer = setTimeout(() => {
                        const quantity = e.target.value;
                        const itemHash = e.target.getAttribute('name').replace(/cart\[([\w]+)\]\[qty\]/g, '$1');

if( quantity ) {
                            sendAjaxQuantityRequest(e.target, quantity,itemHash);
                        }
                    }, doneTypingInterval);
                }
            });
        });
    }
}