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@MrSaints
Last active October 19, 2022 09:42
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A simple AngularJS application to add / delete / list / sort data comprising of three fields (state code, price and tax). It was written to demonstrate to a friend, the simplicity and power of Angular to address programming challenges - in recruitment processes - quickly and effectively.
<!DOCTYPE html>
<html ng-app>
<head>
<title>Add / List Data (AngularJS)</title>
<style>
.list_data { margin-bottom: 2rem }
table, th, td { border: 1px solid #AAA }
th { cursor: pointer }
</style>
</head>
<body ng-controller="RecordCtrl">
<div class="list_data">
<h1>List Data</h1>
<table>
<tr>
<th ng-click="type = 'include'; reverse = !reverse">Status</th>
<th ng-click="type = 'state'; reverse = !reverse">State</th>
<th ng-click="type = 'price'; reverse = !reverse">Price</th>
<th ng-click="type = 'tax'; reverse = !reverse">Tax</th>
<th>Action</th>
</tr>
<tr ng-repeat="record in records | orderBy:type:reverse">
<td><input type="checkbox" ng-model="record.include"></td>
<td>{{record.state | uppercase}}</td>
<td>{{record.price | currency}}</td>
<td>{{record.tax | currency}}</td>
<td><button ng-click="Delete($index)">Delete</button></td>
</tr>
<tr>
<td colspan="2">Total</td>
<td>{{Totals().price | currency}}</td>
<td>{{Totals().tax | currency}}</td>
<td>&nbsp;</td>
</tr>
</table>
<button ng-show="history.length > 0" ng-click="Undo()">Undo Delete</button>
</div>
<div class="add_data">
<h1>Add Data</h1>
<form ng-submit="Add()">
<div class="field">
<label for="state">State: </label>
<input id="state" type="text" placeholder="State" maxlength="2" ng-model="newState">
</div>
<div class="field">
<label for="price">Price: </label>
<input id="price" type="number" placeholder="Price" min="0" ng-model="newPrice">
</div>
<div class="field">
<label for="tax">Tax: </label>
<input id="tax" type="number" placeholder="Tax" min="0" ng-model="newTax">
</div>
<div class="action">
<button type="submit">Add</button>
<button ng-click="Reset()">Reset</button>
</div>
</form>
</div>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<script src="//ajax.googleapis.com/ajax/libs/angularjs/1.2.11/angular.min.js"></script>
<script>
function RecordCtrl ($scope) {
// Historical data
$scope.history = [];
// Default data (can be loaded from a database)
$scope.records = [
{ state: 'CA', price: 22, tax: 5, include: false },
{ state: 'MA', price: 32, tax: 8, include: false }
];
// Total prices
$scope.Totals = function () {
var priceTotal = 0;
var taxTotal = 0;
// Loop through main records and calculate aggregate prices and taxes if include is true
angular.forEach($scope.records, function (record) {
if (record.include) {
priceTotal += record.price;
taxTotal += record.tax;
}
});
// Return aggregate data
return { price: priceTotal , tax: taxTotal };
};
// Delete data
$scope.Delete = function (index) {
// Remove first / oldest element from history if it reaches maximum capacity of 10 records
if ($scope.history.length === 10)
$scope.history.shift();
// Add deleted record to historical records
$scope.history.push($scope.records[index]);
// Remove from main records (using index)
$scope.records.splice(index, 1);
};
// Reset new data model
$scope.Reset = function () {
$scope.newState = '';
$scope.newPrice = 0;
$scope.newTax = 0;
}
$scope.Reset();
// Add new data
$scope.Add = function () {
// Do nothing if no state is entered (blank)
if (!$scope.newState)
return;
// Add to main records
$scope.records.push({
state: $scope.newState,
price: $scope.newPrice,
tax: $scope.newTax,
include: false
});
// See $Scope.Reset...
$scope.Reset();
}
// Undo action (delete)
$scope.Undo = function () {
// Add last / most recent historical record to the main records
$scope.records.push($scope.history[ $scope.history.length - 1 ]);
// Remove last / most recent historical record
$scope.history.pop();
}
}
</script>
</body>
</html>
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