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browserExampleQRCode.html
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<!DOCTYPE html>
<html>
<head>
<meta content="text/html;charset=utf-8" http-equiv="Content-Type">
<meta content="utf-8" http-equiv="encoding">
<style>
.button {
border: none;
color: white;
padding: 16px 32px;
text-align: center;
text-decoration: none;
display: inline-block;
font-size: 16px;
margin: 4px 2px;
transition-duration: 0.4s;
cursor: pointer;
}
.buttonGreen {
background-color: white;
color: black;
border: 2px solid #4CAF50;
}
.buttonGreen:hover {
background-color: #4CAF50;
color: white;
}
</style>
</head>
<body>
<h1>WhatsApp client browser example</h1>
<form>
<label for="idInstance">Id Instance:</label><br>
<input required type="text" id="idInstance" name="idInstance"><br>
<label for="apiTokenIsntance">API Token:</label><br>
<input required type="text" id="apiTokenIsntance" name="apiTokenIsntance"><br>
</form>
<p style="color:blue" id="statusText"></p>
<p style="color:blue" id="resultText"></p>
<p>Press button to get qr code</p>
<div style="display:grid; width: 20%">
<button id="getQrBtn" class="button buttonGreen">Get QR</button>
<button style="display: none" hidden id="logoutQrBtn" class="button buttonGreen">Logout</button>
<img hidden id="img-qr-code" alt="QR-Code" class="sb-qr-wizard-qr-code" aria-hidden="false" src="data:image/png;base64,%QR_DATA%" style="">
</div>
<script type="text/javascript" src="https://unpkg.com/@green-api/whatsapp-api-client/lib/whatsapp-api-client.min.js"></script>
<script>
var intervalId = null
const qrCodeElement = document.getElementById("img-qr-code")
const qrTempalte = qrCodeElement.getAttribute('src');
document.getElementById("getQrBtn").addEventListener("click", function () {
try {
isAuthed();
clearInterval(intervalId)
updateQRCode()
intervalId = setInterval(updateQRCode, 5000);
} catch (reason) {
console.error(reason);
document.getElementById("resultText").innerHTML = reason + ". See logs for details";
}
});
document.getElementById("logoutQrBtn").addEventListener("click", function () {
try {
const restAPI = whatsAppClient.restAPI(({
idInstance: document.getElementById("idInstance").value,
apiTokenInstance: document.getElementById("apiTokenIsntance").value
}))
restAPI.instance.logout()
.then((data) => {
document.getElementById("resultText").innerHTML = "isLogout=" + data.isLogout
isAuthed();
}).catch((reason) => {
console.error(reason);
document.getElementById("resultText").innerHTML = reason + ". See logs for details";
});
} catch (reason) {
console.error(reason);
document.getElementById("resultText").innerHTML = reason + ". See logs for details";
}
});
function updateQRCode() {
const restAPI = whatsAppClient.restAPI(({
idInstance: document.getElementById("idInstance").value,
apiTokenInstance: document.getElementById("apiTokenIsntance").value
}))
restAPI.instance.qr()
.then((data) => {
console.log(data);
document.getElementById("resultText").innerHTML = "";
if (data.type === 'qrCode') {
qrCodeElement.hidden = false;
qrCodeElement.setAttribute('src', qrTempalte.replace("%QR_DATA%", data.message))
} else {
qrCodeElement.hidden = true;
clearInterval(intervalId)
isAuthed();
document.getElementById("resultText").innerHTML = data.message
}
}).catch((reason) => {
console.error(reason);
document.getElementById("resultText").innerHTML = reason + ". See logs for details";
});
}
function isAuthed() {
const restAPI = whatsAppClient.restAPI(({
idInstance: document.getElementById("idInstance").value,
apiTokenInstance: document.getElementById("apiTokenIsntance").value
}))
restAPI.instance.getStateInstance().then(data => {
document.getElementById("statusText").innerHTML = data.stateInstance;
if (data.stateInstance === 'authorized') {
document.getElementById("getQrBtn").style.display = "none"
document.getElementById("logoutQrBtn").style.display = "block"
} else {
document.getElementById("getQrBtn").style.display = "block"
document.getElementById("logoutQrBtn").style.display = "none"
}
})
}
</script>
</body>
</html>