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@@ -0,0 +1,67 @@
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+// Chat Homework
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+function jsonPost(url, data) {
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+ return new Promise((resolve, reject) => {
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+ var x = new XMLHttpRequest();
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+ x.onerror = () => reject(new Error('jsonPost failed'))
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+ //x.setRequestHeader('Content-Type', 'application/json');
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+ x.open("POST", url, true);
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+ x.send(JSON.stringify(data))
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+
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+ x.onreadystatechange = () => {
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+ if (x.readyState == XMLHttpRequest.DONE && x.status == 200) {
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+ resolve(JSON.parse(x.responseText))
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+ }
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+ else if (x.status != 200) {
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+ reject(new Error('status is not 200'))
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+ }
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+ }
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+ })
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+}
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+
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+let login = document.getElementById('nick')
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+let msg = document.getElementById('msg')
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+let send = document.getElementById('send')
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+let chat = document.getElementById('chat')
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+
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+function sendMessage() {
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+ const newMsg = jsonPost("http://students.a-level.com.ua:10012", {
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+ func: 'addMessage',
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+ nick: login.value,
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+ message: msg.value
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+ })
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+ newMsg.then(data => console.log(data.nextMessageId))
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+}
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+
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+function getMessages() {
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+ jsonPost("http://students.a-level.com.ua:10012", {
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+ func: "getMessages",
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+ messageId: 0
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+ }).then((a) => {
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+ showMsg(a.data, chat)
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+ })
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+}
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+
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+send.onclick = () => {
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+ return sendMessage(),
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+ getMessages()
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+}
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+
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+function showMsg(data, container) {
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+ let sortedData = data.sort((a, b) => b.timestamp - a.timestamp)
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+ for (let message of sortedData) {
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+ let div = document.createElement('div')
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+ let spanName = document.createElement('span')
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+ let spanMsg = document.createElement('span')
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+ let spanTime = document.createElement('span')
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+ let time = new Date(message.timestamp)
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+ container.appendChild(div)
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+ div.appendChild(spanName)
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+ div.appendChild(spanMsg)
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+ div.appendChild(spanTime)
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+ spanName.innerHTML = message.nick + ' : '
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+ spanMsg.innerHTML = message.message + ' '
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+ spanTime.innerHTML = time
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+ }
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+}
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+
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+setInterval(getMessages, 3000)
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