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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Coursetro Smart Contract</title>
<link rel="stylesheet" type="text/css" href="main.css">
<script src="./node_modules/web3/dist/web3.min.js"></script>
</head>
<body>
<div class="container">
<h1>Coursetro Instructor</h1>
<span id="countIns"></span>
<h2 id="instructor"></h2>
<span id="insTrans"></span>
<hr>
<img id="loader" src="https://loading.io/spinners/double-ring/lg.double-ring-spinner.gif">
<label for="fName" class="col-lg-2 control-label">First Name</label>
<input id="fName" type="text">
<label for="lName" class="col-lg-2 control-label">Last Name</label>
<input id="lName" type="text">
<label for="age" class="col-lg-2 control-label">Instructor Age</label>
<input id="age" type="text">
<button id="button">Update Instructor</button>
</div>
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"></script>
<script>
if (typeof web3 !== 'undefined') {
web3 = new Web3(web3.currentProvider);
} else {
web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:8545"));
}
web3.eth.defaultAccount = web3.eth.accounts[0];
var CoursetroContract = web3.eth.contract([
{
"constant": true,
"inputs": [
{
"name": "_address",
"type": "address"
}
],
"name": "getInstructor",
"outputs": [
{
"name": "",
"type": "uint256"
},
{
"name": "",
"type": "bytes16"
},
{
"name": "",
"type": "bytes16"
}
],
"payable": false,
"stateMutability": "view",
"type": "function"
},
{
"constant": true,
"inputs": [],
"name": "getInstructors",
"outputs": [
{
"name": "",
"type": "address[]"
}
],
"payable": false,
"stateMutability": "view",
"type": "function"
},
{
"constant": true,
"inputs": [
{
"name": "",
"type": "uint256"
}
],
"name": "instructorsAccts",
"outputs": [
{
"name": "",
"type": "address"
}
],
"payable": false,
"stateMutability": "view",
"type": "function"
},
{
"constant": true,
"inputs": [],
"name": "countInstructors",
"outputs": [
{
"name": "",
"type": "uint256"
}
],
"payable": false,
"stateMutability": "view",
"type": "function"
},
{
"constant": false,
"inputs": [
{
"name": "_address",
"type": "address"
},
{
"name": "_age",
"type": "uint256"
},
{
"name": "_fName",
"type": "bytes16"
},
{
"name": "_lName",
"type": "bytes16"
}
],
"name": "setInstructor",
"outputs": [],
"payable": false,
"stateMutability": "nonpayable",
"type": "function"
},
{
"anonymous": false,
"inputs": [
{
"indexed": false,
"name": "fName",
"type": "bytes16"
},
{
"indexed": false,
"name": "lName",
"type": "bytes16"
},
{
"indexed": false,
"name": "age",
"type": "uint256"
}
],
"name": "instructorInfo",
"type": "event"
}
]);
var Coursetro = CoursetroContract.at('0x0808eb428c93b67af850cacc83e95f471ef59134');
var instructorEvent = Coursetro.instructorInfo({}, 'latest');
instructorEvent.watch(function(error, result) {
if (result) {
if (result.blockHash != $("#insTrans").html())
$("#loader").hide();
$("#insTrans").html('Block hash: ' + result.blockHash);
$("#instructor").html(web3.toAscii(result.args.fName) + ' ' + web3.toAscii(result.args.lName) + ' (' + result.args.age + ' years old)');
} else {
$("#loader").hide();
}
});
Coursetro.countInstructors((err, res) => {
if (res)
$("#countIns").html(res.c + ' Instructors');
})
$("#button").click(function() {
$("#loader").show();
Coursetro.setInstructor(web3.eth.defaultAccount, $("#age").val(), $("#fName").val(), $("#lName").val(), (err, res) => {
if (err) {
$("#loader").hide();
}
});
});
</script>
</body>
</html>