Allow themes from npm

client/index.html

@@ -264,8 +264,8 @@
 								<label for="theme-select" class="sr-only">Theme</label>
 								<select id="theme-select" name="theme" class="input">
 									{{#each themes}}
-										<option value="{{filename}}">
-											{{name}}
+										<option value="{{name}}">
+											{{displayName}}
 										</option>
 									{{/each}}
 								</select>

defaults/config.js

@@ -51,11 +51,12 @@ module.exports = {
 
 	//
 	// Set the default theme.
+	// Find out how to add new themes at https://thelounge.github.io/docs/packages/themes
 	//
 	// @type     string
-	// @default  "themes/example.css"
+	// @default  "example"
 	//
-	theme: "themes/example.css",
+	theme: "example",
 
 	//
 	// Prefetch URLs

src/helper.js

@@ -12,6 +12,8 @@ const colors = require("colors/safe");
 var Helper = {
 	config: null,
 	expandHome: expandHome,
+	getPackagesPath: getPackagesPath,
+	getPackageModulePath: getPackageModulePath,
 	getStoragePath: getStoragePath,
 	getUserConfigPath: getUserConfigPath,
 	getUserLogsPath: getUserLogsPath,
@@ -96,6 +98,14 @@ function getStoragePath() {
 	return path.join(this.HOME, "storage");
 }
 
+function getPackagesPath() {
+	return path.join(this.HOME, "packages", "node_modules");
+}
+
+function getPackageModulePath(packageName) {
+	return path.join(Helper.getPackagesPath(), packageName);
+}
+
 function ip2hex(address) {
 	// no ipv6 support
 	if (!net.isIPv4(address)) {

src/plugins/themes.js

@@ -0,0 +1,85 @@
+"use strict";
+
+const fs = require("fs");
+const Helper = require("../helper");
+const colors = require("colors/safe");
+const path = require("path");
+const _ = require("lodash");
+const themes = new Map();
+
+module.exports = {
+	getAll: getAll,
+	getFilename: getFilename
+};
+
+fs.readdir("client/themes/", (err, builtInThemes) => {
+	if (err) {
+		return;
+	}
+	builtInThemes
+		.filter((theme) => theme.endsWith(".css"))
+		.map(makeLocalThemeObject)
+		.forEach((theme) => themes.set(theme.name, theme));
+});
+
+fs.readdir(Helper.getPackagesPath(), (err, packages) => {
+	if (err) {
+		return;
+	}
+	packages
+		.map(makePackageThemeObject)
+		.forEach((theme) => {
+			if (theme) {
+				themes.set(theme.name, theme);
+			}
+		});
+});
+
+function getAll() {
+	return _.sortBy(Array.from(themes.values()), "displayName");
+}
+
+function getFilename(module) {
+	if (themes.has(module)) {
+		return themes.get(module).filename;
+	}
+}
+
+function makeLocalThemeObject(css) {
+	const themeName = css.slice(0, -4);
+	return {
+		displayName: themeName.charAt(0).toUpperCase() + themeName.slice(1),
+		filename: path.join(__dirname, "..", "client", "themes", `${themeName}.css`),
+		name: themeName
+	};
+}
+
+function getModuleInfo(packageName) {
+	let module;
+	try {
+		module = require(Helper.getPackageModulePath(packageName));
+	} catch (e) {
+		log.warn(`Specified theme ${colors.yellow(packageName)} is not installed in packages directory`);
+		return;
+	}
+	if (!module.lounge) {
+		log.warn(`Specified theme ${colors.yellow(packageName)} doesn't have required information.`);
+		return;
+	}
+	return module.lounge;
+}
+
+function makePackageThemeObject(moduleName) {
+	const module = getModuleInfo(moduleName);
+	if (!module || module.type !== "theme") {
+		return;
+	}
+	const modulePath = Helper.getPackageModulePath(moduleName);
+	const displayName = module.name || moduleName;
+	const filename = path.join(modulePath, module.css);
+	return {
+		displayName: displayName,
+		filename: filename,
+		name: moduleName
+	};
+}

src/server.js

@@ -14,6 +14,7 @@ var Helper = require("./helper");
 var colors = require("colors/safe");
 const net = require("net");
 const Identification = require("./identification");
+const themes = require("./plugins/themes");
 
 // The order defined the priority: the first available plugin is used
 // ALways keep local auth in the end, which should always be enabled.
@@ -51,6 +52,15 @@ module.exports = function() {
 		.set("view engine", "html")
 		.set("views", path.join(__dirname, "..", "client"));
 
+	app.get("/themes/:theme.css", (req, res) => {
+		const themeName = req.params.theme;
+		const theme = themes.getFilename(themeName);
+		if (theme === undefined) {
+			return res.status(404).send("Not found");
+		}
+		return res.sendFile(theme);
+	});
+
 	var config = Helper.config;
 	var server = null;
 
@@ -191,16 +201,13 @@ function index(req, res, next) {
 		pkg,
 		Helper.config
 	);
+	if (!data.theme.includes(".css")) { // Backwards compatibility for old way of specifying themes in settings
+		data.theme = `themes/${data.theme}.css`;
+	} else {
+		log.warn(`Referring to CSS files in the ${colors.green("theme")} setting of ${colors.green(Helper.CONFIG_PATH)} is ${colors.bold("deprecated")} and will be removed in a future version.`);
+	}
 	data.gitCommit = Helper.getGitCommit();
-	data.themes = fs.readdirSync("client/themes/").filter(function(themeFile) {
-		return themeFile.endsWith(".css");
-	}).map(function(css) {
-		const filename = css.slice(0, -4);
-		return {
-			name: filename.charAt(0).toUpperCase() + filename.slice(1),
-			filename: filename
-		};
-	});
+	data.themes = themes.getAll();
 
 	const policies = [
 		"default-src *",