230 lines
9 KiB
JavaScript
230 lines
9 KiB
JavaScript
class chatPostprocessor{
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constructor(){
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}
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preprocess(chatEntry, rawData){
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this.rawData = rawData;
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//Set current chat nodes
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this.chatEntry = chatEntry;
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this.chatBody = this.chatEntry.querySelector(".chat-entry-body");
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//Split the chat message into an array of objects representing each word
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this.splitMessage();
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//Inject links into un-processed placeholders
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this.processLinks();
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//Inject whitespace into un-processed words
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this.addWhitespace();
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//Handle non-standard chat types
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this.handleChatType();
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//Inject the pre-processed chat into the chatEntry node
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this.injectBody();
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//Return the pre-processed node
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return this.chatEntry;
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}
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splitMessage(){
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//Create an empty array to hold the body
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this.messageArray = [];
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//Split string by word-boundries, with negative lookaheads to exclude file seperators so we don't split link placeholders
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const splitString = this.rawData.msg.split(/(?<!␜)\b/g);
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//for each word in the splitstring
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splitString.forEach((string) => {
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//create a word object
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const wordObj = {
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string: string,
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type: "word"
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}
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//Add it to our body array
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this.messageArray.push(wordObj);
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});
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}
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injectBody(){
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//Create an empty array to hold the objects to inject
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const injectionArray = [""];
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const _this = this;
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//For each word object
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this.messageArray.forEach((wordObj) => {
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if(wordObj.type == 'word'){
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//Inject current wordObj string into the chat body
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injectString(wordObj.string);
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}else if(wordObj.type == 'link'){
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//Create a link node from our link
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const link = document.createElement('a');
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link.classList.add('chat-link');
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link.href = wordObj.link;
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//Use textContent to be safe since links can't be escaped serverside
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link.textContent = wordObj.link;
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//Append node to chatBody
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injectNode(wordObj, link);
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}else if(wordObj.type == 'deadLink'){
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//Create a text span node from our link
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const badLink = document.createElement('a');
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badLink.classList.add('chat-dead-link', 'danger-link');
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badLink.href = wordObj.link;
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//Use textContent to be safe since links can't be escaped serverside
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badLink.textContent = wordObj.link;
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//Append node to chatBody
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injectNode(wordObj, badLink);
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}else if(wordObj.type == 'malformedLink'){
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//Create a text span node from our link
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const malformedLink = document.createElement('span');
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malformedLink.classList.add('chat-malformed-link');
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//Use textContent to be safe since links can't be escaped (this is why we don't just add it using injectString)
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//arguably we could sanatize malformed links serverside since they're never actually used as links
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malformedLink.textContent = wordObj.link;
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//Append node to chatBody
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injectNode(wordObj, malformedLink);
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}else if(wordObj.type == 'image'){
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//Create an img node from our link
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const img = document.createElement('img');
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img.classList.add('chat-img');
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img.src = wordObj.link;
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//Append node to chatBody
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injectNode(wordObj, img);
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}else if(wordObj.type == 'video'){
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//Create a video node from our link
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const vid = document.createElement('video');
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vid.classList.add('chat-video');
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vid.src = wordObj.link;
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vid.controls = false;
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vid.autoplay = true;
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vid.loop = true;
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vid.muted = true;
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injectNode(wordObj, vid);
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}
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});
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//For each item found in the injection array
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injectionArray.forEach((item) => {
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//if it's a string
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if(typeof item == "string"){
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//Add it to the chat's innerHTML (it should already be escaped by the server)
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this.chatBody.innerHTML += item;
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//Otherwise it should be a DOM node
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}else{
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//Append the node to our chat body
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this.chatBody.appendChild(item);
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}
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})
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//Like string.replace except it actually injects the node so we can keep things like event handlers
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function injectNode(wordObj, node, placeholder = '␜'){
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//Split string by the placeholder so we can keep surrounding whitespace
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const splitWord = wordObj.string.split(placeholder, 2);
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//Append the first half of the string
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injectString(splitWord[0]);
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//Append the node
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injectionArray.push(node);
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//Append the second half of the string
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injectString(splitWord[1]);
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}
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function injectString(string){
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//If the last item was a string
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if(typeof injectionArray[injectionArray.length - 1] == "string"){
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//add the word string on to the end of the string
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injectionArray[injectionArray.length - 1] += string;
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}else{
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//Pop the string at the end of the array
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injectionArray.push(string);
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}
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}
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}
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addWhitespace(){
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//for each word object in the body
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this.messageArray.forEach((wordObj, wordIndex) => {
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//if the word object hasn't been pre-processed elsewhere
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if(wordObj.type == "word"){
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//Create an empty array to hold our word
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var wordArray = [];
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//For each character in the string of the current word object
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this.messageArray[wordIndex].string.split("").forEach((char, charIndex) => {
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//push the current character to the wordArray
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wordArray.push(char);
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//After eight characters
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if(charIndex > 8){
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//Push an invisible line-break character between every character
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wordArray.push("ㅤ");
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}
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});
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//Join the wordArray into a single string, and use it to set the current wordObject's string
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this.messageArray[wordIndex].string = wordArray.join("");
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}
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});
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}
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processLinks(){
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//If we don't have links
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if(this.rawData.links == null){
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//Don't bother
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return;
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}
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//For every link received in this message
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this.rawData.links.forEach((link, linkIndex) => {
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//For every word obj in the message array
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this.messageArray.forEach((wordObj, wordIndex) => {
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//Check current wordobj for link (placeholder may contain whitespace with it)
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if(wordObj.string.match(`␜${linkIndex}`)){
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//Set current word object in the body array to the new link object
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this.messageArray[wordIndex] = {
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//Don't want to use a numbered placeholder to make this easier during body injection
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//but we also don't want to clobber any surrounding whitespace
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string: wordObj.string.replace(`␜${linkIndex}`, '␜'),
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link: link.link,
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type: link.type
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}
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}
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})
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});
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}
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handleChatType(){
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if(this.rawData.type == "whisper"){
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//add whisper class
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this.chatBody.classList.add('whisper');
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}else if(this.rawData.type == "announcement"){
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//Squash the high-level
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this.chatEntry.querySelector('.high-level').remove();
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//Get the username and make it into an announcement title (little hacky but this *IS* postprocessing)
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const userNode = this.chatEntry.querySelector('.chat-entry-username');
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userNode.innerHTML = `${userNode.innerHTML.slice(0,-2)} Announcement`;
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//Add/remove relevant classes
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userNode.classList.remove('chat-entry-username');
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userNode.classList.add('announcement-title');
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this.chatBody.classList.add('announcement-body');
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this.chatEntry.classList.add('announcement');
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}else if(this.rawData.type == "toke" || this.rawData.type == "tokewhisper"){
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//Squash the high-level
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this.chatEntry.querySelector('.high-level').remove();
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//remove the username
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this.chatEntry.querySelector('.chat-entry-username').remove();
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//Add toke/tokewhisper class
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this.chatBody.classList.add(this.rawData.type);
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}
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}
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} |