seo-rich-snippets-min-quantity-fix.html

<script data-cfasync="false">
/*
    Web Site Advantage: Min Quantity Fix [v1.1] 
    Multiplies prices by min quantity to comply with Google Merchant Centre requirements
    https://bigcommerce.websiteadvantage.com.au/
    Copyright (C) 2023 Web Site Advantage
*/   
{{#if page_type '===' 'product' }}

// Fix is now in the Tag Rocket app, so this is no longer required. However you could use it to customise referenceQuantity and referenceQuantity.valueReference values.

// place this in the footer

!function(w,d){

    // https://support.google.com/merchants/answer/6098334
    // https://support.google.com/merchants/answer/6386198
    // https://support.google.com/merchants/answer/6324371
    // https://developers.google.com/search/docs/appearance/structured-data/product#unit-pricing-example

    // https://support.google.com/merchants/answer/6324455
    var unit_pricing_measure_include = false; 
    var unit_pricing_measure_type = "ct"; // Per unit

    // https://support.google.com/merchants/answer/6324490
    var unit_pricing_base_measure_include = false; // requires unit_pricing_measure_include to be true
    var unit_pricing_base_measure = 1; 
    var unit_pricing_base_measure_type = "ct"; // Per unit
    
    // END of settings

    var element = d.getElementById('wsa-rich-snippets-jsonld-product'); // change for development server

    var json = JSON.parse(element.text);

    var unit_pricing_measure = null;

    if (!json.offers) 
        return;

    for(var i=0; i < json.offers.length; i++) {
        var offer = json.offers[i];

        if (offer["@type"] == "Offer") {
            var priceSpecification = offer.priceSpecification;

            if (!priceSpecification || !priceSpecification.eligibleQuantity) 
                continue;
                
            unit_pricing_measure = priceSpecification.eligibleQuantity.minValue;

            if (!unit_pricing_measure) 
                continue;

            // fix the price
            if (offer.price) {
                // Docs say only put price in the priceSpecification when adding a referenceQuantity
                delete offer.price; 
                delete offer.priceCurrency; 
            }

            if (priceSpecification.price) {
                priceSpecification.price *= unit_pricing_measure;
            }

            if (priceSpecification.maxPrice) {
                priceSpecification.maxPrice *= unit_pricing_measure;
            }

            if (priceSpecification.minPrice) {
                priceSpecification.minPrice *= unit_pricing_measure;
            }

            delete priceSpecification.eligibleQuantity;

            if (!unit_pricing_measure_include) 
                continue;

            priceSpecification.referenceQuantity = {
                "@type": "QuantitativeValue",
                "value": unit_pricing_measure,
                "unitCode": unit_pricing_measure_type
            };

            if (!unit_pricing_base_measure_include) 
                continue;

            priceSpecification.referenceQuantity.valueReference = {
                "@type": "QuantitativeValue",
                "value": unit_pricing_base_measure,
                "unitCode": unit_pricing_base_measure_type
            };        
        }
        else if (offer["@type"] == "AggregateOffer") {
            if (unit_pricing_measure == null)   
                continue;

            if (offer.lowPrice) {
                offer.lowPrice *= unit_pricing_measure;
            }
            if (offer.highPrice) {
                offer.highPrice *= unit_pricing_measure;
            }
        }
    }
    element.text = JSON.stringify(json);

}(window, document)
{{/if}}
</script>