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