foodsoft/public/javascripts/ordering.js

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// JavaScript that handles the dynamic ordering quantities on the ordering page.
//
// In a JavaScript block on the actual view, define the article data by calls to setData().
// You should also set the available group balance through setGroupBalance(amount).
//
// Call setDecimalSeparator(char) to overwrite the default character "." with a localized value.
var modified = false // indicates if anything has been clicked on this page
var groupBalance = 0; // available group money
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var decimalSeparator = "."; // default decimal separator
var toleranceIsCostly = true; // default tolerance behaviour
var isStockit = false; // Wheter the order is from stock oder normal supplier
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// Article data arrays:
var price = new Array();
var unit = new Array(); // items per order unit
var itemTotal = new Array(); // total item price
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var quantityOthers = new Array();
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var toleranceOthers = new Array();
var itemsAllocated = new Array(); // how many items the group has been allocated and should definitely get
var quantityAvailable = new Array(); // stock_order. how many items are currently in stock
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function setDecimalSeparator(character) {
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decimalSeparator = character;
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}
function setToleranceBehaviour(value) {
toleranceIsCostly = value;
}
function setStockit(value) {
isStockit = value;
}
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function setGroupBalance(amount) {
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groupBalance = amount;
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}
function addData(orderArticleId, itemPrice, itemUnit, itemSubtotal, itemQuantityOthers, itemToleranceOthers, allocated, available) {
var i = orderArticleId;
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price[i] = itemPrice;
unit[i] = itemUnit;
itemTotal[i] = itemSubtotal;
quantityOthers[i] = itemQuantityOthers;
toleranceOthers[i] = itemToleranceOthers;
itemsAllocated[i] = allocated;
quantityAvailable[i] = available;
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}
function increaseQuantity(item) {
var value = Number($('#q_' + item).val()) + 1;
if (!isStockit || (value <= (quantityAvailable[item] - quantityOthers[item]))) {
update(item, value, $('#t_' + item).val());
}
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}
function decreaseQuantity(item) {
var value = Number($('#q_' + item).val()) - 1;
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if (value >= 0) {
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update(item, value, $('#t_' + item).val());
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}
}
function increaseTolerance(item) {
var value = Number($('#t_' + item).val()) + 1;
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update(item, $('#q_' + item).val(), value);
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}
function decreaseTolerance(item) {
var value = Number($('#t_' + item).val()) - 1;
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if (value >= 0) {
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update(item, $('#q_' + item).val(), value);
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}
}
function update(item, quantity, tolerance) {
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// set modification flag
modified = true
// update hidden input fields
$('#q_' + item).val(quantity);
$('#t_' + item).val(tolerance);
// calculate how many units would be ordered in total
var units = calcUnits(unit[item], quantityOthers[item] + Number(quantity), toleranceOthers[item] + Number(tolerance));
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if (unitCompletedFromTolerance(unit[item], quantityOthers[item] + Number(quantity), toleranceOthers[item] + Number(tolerance))) {
$('#units_' + item).html('<span style=\"color:grey\">' + String(units) + '</span>');
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} else {
$('#units_' + item).html(String(units));
}
// update used/unused quantity
var available = Math.max(0, units * unit[item] - quantityOthers[item]);
var q_used = Math.min(available, quantity);
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// ensure that at least the amout of items this group has already been allocated is used
if (quantity >= itemsAllocated[item] && q_used < itemsAllocated[item]) {
q_used = itemsAllocated[item];
}
$('#q_used_' + item).html(String(q_used));
$('#q_unused_' + item).html(String(quantity - q_used));
$('#q_total_' + item).html(String(Number(quantity) + quantityOthers[item]));
// update used/unused tolerance
if (unit[item] > 1) {
available = Math.max(0, available - q_used - toleranceOthers[item]);
t_used = Math.min(available, tolerance);
$('#t_used_' + item).html(String(t_used));
$('#t_unused_' + item).html(String(tolerance - t_used));
$('#t_total_' + item).html(String(Number(tolerance) + toleranceOthers[item]));
}
// update total price
if(toleranceIsCostly == true) {
itemTotal[item] = price[item] * (Number(quantity) + Number(tolerance));
} else {
itemTotal[item] = price[item] * (Number(quantity));
}
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$('#price_' + item + '_display').html(asMoney(itemTotal[item]));
// update missing units
var missing_units = unit[item] - (((quantityOthers[item] + Number(quantity)) % unit[item]) + Number(tolerance) + toleranceOthers[item])
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if (missing_units < 0) {
missing_units = 0;
}
$('#missing_units_' + item).html(String(missing_units));
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// update balance
updateBalance();
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}
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function asMoney(amount) {
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return String(amount.toFixed(2)).replace(/\./, ",");
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}
function calcUnits(unitSize, quantity, tolerance) {
var units = Math.floor(quantity / unitSize)
var remainder = quantity % unitSize
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return units + ((remainder > 0) && (remainder + tolerance >= unitSize) ? 1 : 0)
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}
function unitCompletedFromTolerance(unitSize, quantity, tolerance) {
var remainder = quantity % unitSize
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return (remainder > 0 && (remainder + tolerance >= unitSize));
}
function updateBalance() {
// update total price and order balance
var total = 0;
for (i in itemTotal) {
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total += itemTotal[i];
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}
$('#total_price').html(asMoney(total));
var balance = groupBalance - total;
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$('#new_balance').html(asMoney(balance));
$('#total_balance').val(asMoney(balance));
// determine bgcolor and submit button state according to balance
var bgcolor = '';
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if (balance < 0) {
bgcolor = '#FF0000';
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$('#submit_button').disabled = true;
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} else {
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$('#submit_button').disabled = false;
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}
// update bgcolor
for (i in itemTotal) {
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$('#ltd_price_' + i).css('background-color', bgcolor);
}
}
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$(function() {
$('input[data-increase_quantity]').click(function() {
increaseQuantity($(this).data('increase_quantity'));
});
$('input[data-decrease_quantity]').click(function() {
decreaseQuantity($(this).data('decrease_quantity'));
});
$('input[data-increase_tolerance]').click(function() {
increaseTolerance($(this).data('increase_tolerance'));
});
$('input[data-decrease_tolerance]').click(function() {
decreaseTolerance($(this).data('decrease_tolerance'));
});
$('a[data-confirm_switch_order]').click(function() {
return (!modified || confirm('Änderungen an dieser Bestellung gehen verloren, wenn zu einer anderen Bestellung gewechselt wird. Möchtest Du trotzdem wechseln?'));
});
});