refactor the whole damn thing
This commit is contained in:
@@ -13,10 +13,6 @@
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<input type="submit" value="Send">
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</form>
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<script src="../../y.js"></script>
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<script src="../../../y-array/y-array.js"></script>
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<script src="../../../y-map/dist/y-map.js"></script>
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<script src="../../../y-text/dist/y-text.js"></script>
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<script src="../../../y-memory/y-memory.js"></script>
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<script src="../../../y-websockets-client/dist/y-websockets-client.js"></script>
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<script src="./index.js"></script>
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</body>
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@@ -1,73 +1,71 @@
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/* global Y, chat */
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/* global Y */
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// initialize a shared object. This function call returns a promise!
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Y({
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db: {
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name: 'memory'
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},
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var y = new Y({
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connector: {
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name: 'websockets-client',
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room: 'chat-example'
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},
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sourceDir: '/bower_components',
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share: {
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chat: 'Array'
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}
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}).then(function (y) {
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window.yChat = y
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// This functions inserts a message at the specified position in the DOM
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function appendMessage (message, position) {
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var p = document.createElement('p')
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var uname = document.createElement('span')
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uname.appendChild(document.createTextNode(message.username + ': '))
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p.appendChild(uname)
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p.appendChild(document.createTextNode(message.message))
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document.querySelector('#chat').insertBefore(p, chat.children[position] || null)
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}
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// This function makes sure that only 7 messages exist in the chat history.
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// The rest is deleted
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function cleanupChat () {
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if (y.share.chat.length > 7) {
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y.share.chat.delete(0, y.chat.length - 7)
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}
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}
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// Insert the initial content
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y.share.chat.toArray().forEach(appendMessage)
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cleanupChat()
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// whenever content changes, make sure to reflect the changes in the DOM
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y.share.chat.observe(function (event) {
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if (event.type === 'insert') {
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for (let i = 0; i < event.length; i++) {
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appendMessage(event.values[i], event.index + i)
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}
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} else if (event.type === 'delete') {
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for (let i = 0; i < event.length; i++) {
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chat.children[event.index].remove()
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}
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}
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// concurrent insertions may result in a history > 7, so cleanup here
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cleanupChat()
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})
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document.querySelector('#chatform').onsubmit = function (event) {
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// the form is submitted
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var message = {
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username: this.querySelector('[name=username]').value,
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message: this.querySelector('[name=message]').value
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}
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if (message.username.length > 0 && message.message.length > 0) {
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if (y.share.chat.length > 6) {
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// If we are goint to insert the 8th element, make sure to delete first.
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y.share.chat.delete(0)
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}
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// Here we insert a message in the shared chat type.
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// This will call the observe function (see line 40)
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// and reflect the change in the DOM
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y.share.chat.push([message])
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this.querySelector('[name=message]').value = ''
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}
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// Do not send this form!
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event.preventDefault()
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return false
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}
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})
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window.yChat = y
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let chatprotocol = y.get('chatprotocol', Y.Array)
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let chatcontainer = document.querySelector('#chat')
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// This functions inserts a message at the specified position in the DOM
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function appendMessage (message, position) {
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var p = document.createElement('p')
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var uname = document.createElement('span')
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uname.appendChild(document.createTextNode(message.username + ': '))
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p.appendChild(uname)
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p.appendChild(document.createTextNode(message.message))
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chatcontainer.insertBefore(p, chatcontainer.children[position] || null)
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}
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// This function makes sure that only 7 messages exist in the chat history.
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// The rest is deleted
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function cleanupChat () {
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if (chatprotocol.length > 7) {
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chatprotocol.delete(0, chatprotocol.length - 7)
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}
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}
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// Insert the initial content
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chatprotocol.toArray().forEach(appendMessage)
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cleanupChat()
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// whenever content changes, make sure to reflect the changes in the DOM
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chatprotocol.observe(function (event) {
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if (event.type === 'insert') {
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for (let i = 0; i < event.length; i++) {
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appendMessage(event.values[i], event.index + i)
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}
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} else if (event.type === 'delete') {
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for (let i = 0; i < event.length; i++) {
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chatcontainer.children[event.index].remove()
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}
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}
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// concurrent insertions may result in a history > 7, so cleanup here
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cleanupChat()
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})
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document.querySelector('#chatform').onsubmit = function (event) {
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// the form is submitted
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var message = {
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username: this.querySelector('[name=username]').value,
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message: this.querySelector('[name=message]').value
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}
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if (message.username.length > 0 && message.message.length > 0) {
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if (chatprotocol.length > 6) {
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// If we are goint to insert the 8th element, make sure to delete first.
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chatprotocol.delete(0)
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}
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// Here we insert a message in the shared chat type.
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// This will call the observe function (see line 40)
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// and reflect the change in the DOM
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chatprotocol.push([message])
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this.querySelector('[name=message]').value = ''
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}
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// Do not send this form!
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event.preventDefault()
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return false
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}
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