gistfile1.js

var to = payload.order.email;
var params = payload.parameters;
var email = {};

var template = null;
for (var i = 0; i < payload.parameters.length; i++) {
    if (payload.parameters[i].name === 'mandrill.order_confirmation.template') {
        template = payload.parameters[i].value;
    }
}

var from = null;
for (var i = 0; i < payload.parameters.length; i++) {
    if (payload.parameters[i].name === 'mandrill.order_confirmation.from') {
        from = payload.parameters[i].value;
    }
}

var subject = null;
for (var i = 0; i < payload.parameters.length; i++) {
    if (payload.parameters[i].name === 'mandrill.order_confirmation.subject') {
        subject = payload.parameters[i].value;
    }
}

var variables = {};
variables.order_number = payload.order.number;

variables.shipping_address_first_name = payload.order.shipping_address.firstname;
variables.shipping_address_last_name = payload.order.shipping_address.lastname;
variables.shipping_address_company = '';
variables.shipping_address_address1 = payload.order.shipping_address.address1;
variables.shipping_address_address2 = payload.order.shipping_address.address2;
variables.shipping_address_city = payload.order.shipping_address.city;
variables.shipping_address_state = payload.order.shipping_address.state;
variables.shipping_address_country = payload.order.shipping_address.country;
variables.shipping_address_zipcode = payload.order.shipping_address.zipcode;

variables.billing_address_first_name = payload.order.billing_address.firstname;
variables.billing_address_last_name = payload.order.billing_address.lastname;
variables.billing_address_company = '';
variables.billing_address_address1 = payload.order.billing_address.address1;
variables.billing_address_address2 = payload.order.billing_address.address2;
variables.billing_address_city = payload.order.billing_address.city;
variables.billing_address_state = payload.order.billing_address.state;
variables.billing_address_country = payload.order.billing_address.country;
variables.billing_address_zipcode = payload.order.billing_address.zipcode;

variables.adjustment_shipping = Number(payload.order.totals.shipping).toFixed(2);
variables.item_total = Number(payload.order.totals.item).toFixed(2);
variables.total = Number(payload.order.totals.order).toFixed(2);

variables.backordered = false;

var line_item_rows = '';
for (var i = 0; i < payload.order.line_items.length; i++) {
    var item = payload.order.line_items[i];

    line_item_rows += '<tr><td>' + item.name + '</td>\
    <td>' + item.quantity + '</td>\
    <td>$' + Number(item.price).toFixed(2) + '</td></tr>';

    var original_line_item = null;
    for (var x = 0; x < payload.original.line_items.length; x++) {
        if (payload.original.line_items[x].variant_id === item.variant_id) {
            original_line_item = payload.original.line_items[x];
        }
    }

    //gift card recipient
    if(original_line_item.gift_card_recipient!==null){
        line_item_rows += '<tr><td colspan="3">&nbsp;&nbsp;Recipient: ' +
        original_line_item.gift_card_recipient + '</td></tr>';
        variables.gift_card_recipient = gift_card_recipient;
    }

    //subscription description
    if(original_line_item.description!==''){
        line_item_rows += '<tr><td colspan="3">&nbsp;&nbsp;' +
        original_line_item.description + '</td></tr>';

    }
}
variables.line_item_rows = line_item_rows;

email.from = from;
email.to = to;

email.subject = subject;
email.template = template;
email.variables = variables;

payload = { email: email, parameters: params };