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03e3444a35
- Add comments and descriptions to: - `findChannels.js` - `parseStyle` - `findLinks` - `fill` - `anyIntersection` - `merge` - `parse` - Minor optimizations to `parseStyle` - Add tests for `fill`
72 lines
2.8 KiB
JavaScript
72 lines
2.8 KiB
JavaScript
"use strict";
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const Handlebars = require("handlebars/runtime");
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const parseStyle = require("./ircmessageparser/parseStyle");
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const findChannels = require("./ircmessageparser/findChannels");
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const findLinks = require("./ircmessageparser/findLinks");
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const merge = require("./ircmessageparser/merge");
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// Create an HTML `span` with styling information for a given fragment
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function createFragment(fragment) {
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let classes = [];
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if (fragment.bold) {
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classes.push("irc-bold");
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}
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if (fragment.textColor !== undefined) {
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classes.push("irc-fg" + fragment.textColor);
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}
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if (fragment.bgColor !== undefined) {
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classes.push("irc-bg" + fragment.bgColor);
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}
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if (fragment.italic) {
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classes.push("irc-italic");
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}
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if (fragment.underline) {
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classes.push("irc-underline");
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}
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const escapedText = Handlebars.Utils.escapeExpression(fragment.text);
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if (classes.length) {
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return `<span class="${classes.join(" ")}">${escapedText}</span>`;
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}
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return escapedText;
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}
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// Transform an IRC message potentially filled with styling control codes, URLs
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// and channels into a string of HTML elements to display on the client.
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module.exports = function parse(text) {
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// Extract the styling information and get the plain text version from it
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const styleFragments = parseStyle(text);
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const cleanText = styleFragments.map(fragment => fragment.text).join("");
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// On the plain text, find channels and URLs, returned as "parts". Parts are
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// arrays of objects containing start and end markers, as well as metadata
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// depending on what was found (channel or link).
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const channelPrefixes = ["#", "&"]; // TODO Channel prefixes should be RPL_ISUPPORT.CHANTYPES
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const userModes = ["!", "@", "%", "+"]; // TODO User modes should be RPL_ISUPPORT.PREFIX
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const channelParts = findChannels(cleanText, channelPrefixes, userModes);
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const linkParts = findLinks(cleanText);
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// Sort all parts identified based on their position in the original text
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const parts = channelParts
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.concat(linkParts)
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.sort((a, b) => a.start - b.start);
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// Merge the styling information with the channels / URLs / text objects and
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// generate HTML strings with the resulting fragments
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return merge(parts, styleFragments).map(textPart => {
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// Create HTML strings with styling information
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const fragments = textPart.fragments.map(createFragment).join("");
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// Wrap these potentially styled fragments with links and channel buttons
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if (textPart.link) {
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const escapedLink = Handlebars.Utils.escapeExpression(textPart.link);
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return `<a href="${escapedLink}" target="_blank" rel="noopener">${fragments}</a>`;
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} else if (textPart.channel) {
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const escapedChannel = Handlebars.Utils.escapeExpression(textPart.channel);
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return `<span class="inline-channel" role="button" tabindex="0" data-chan="${escapedChannel}">${fragments}</span>`;
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}
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return fragments;
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}).join("");
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};
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