Replace CSS parser with postcss

https://www.npmjs.com/package/css doesn't support newer CSS features

server/cssfile.js

@@ -1,5 +1,5 @@
 var csslint = require('csslint').CSSLint;
-var cssparser = require('css');
+var cssparser = require('postcss');
 
 function CssFile(source, path, callback){
 	callback = callback || function(){}
@@ -12,28 +12,25 @@ CssFile.prototype.webSrc = function(){
 };
 
 CssFile.prototype.selectorFromPosition = function(line, column){
-	var rules = this.parsed.stylesheet.rules;
-	for(var i = 0; i < rules.length; i++){
-		var position = rules[i].position;
-		if((position.start.line < line && position.end.line > line)
-				|| (position.start.line == line
-					&& position.end.line != line
-					&& position.start.column <= line)
-				|| (position.start.line != line
-					&& position.end.line == line
-					&& position.start.column >= line)
-				|| (position.start.line == line
-					&& position.end.line == line
-					&& position.start.column <= line
-					&& position.end.column >= line)){
-			if(rules[i].selectors){
-				return rules[i].selectors.join(' ');
-			}else{
-				return null;
-			}
+	for (const rule of this.parsed.nodes) {
+		const {
+			start: { line: startLine, column: startColumn },
+			end: { line: endLine, column: endColumn },
+		} = rule.source
+		if((startLine < line && endLine > line)
+			|| (startLine == line
+				&& endLine != line
+				&& startColumn <= line)
+			|| (startLine != line
+				&& endLine == line
+				&& startColumn >= line)
+			|| (startLine == line
+				&& endLine == line
+				&& startColumn <= line
+				&& endColumn >= line)){
+			return rule.selector || null;
 		}
 	}
-
 	return null;
 };
 
@@ -62,11 +59,12 @@ CssFile.prototype.setContent = function(source, callback){
 		return;
 	}
 
-	this.parsed.stylesheet.rules.forEach(function(rule){
-		var position = rule.position;
-		position.start.line--;
-		position.start.column--;
-	});
+	for (const rule of this.parsed.nodes) {
+		let source = rule.source;
+		source.start.line--;
+		source.start.column--;
+		source.end.column++;
+	}
 
 	if(changed){
 		callback(null);

server/package.json

@@ -4,18 +4,18 @@
   "description": "",
   "main": "bracey.js",
   "dependencies": {
-    "css": "^2.2.1",
-    "csslint": "^0.10.0",
+    "csslint": "^1.0.5",
     "domhandler": "^2.3.0",
     "domutils": "^1.5.1",
     "htmlhint": "^0.11.0",
     "htmlparser2": "^3.9.0",
     "mime": "^1.3.4",
-    "websocket": "^1.0.22"
+    "postcss": "^7.0.32",
+    "websocket": "^1.0.32"
   },
   "devDependencies": {
     "chai": "*",
-    "mocha": "*"
+    "mocha": "^8.1.3"
   },
   "scripts": {
     "test": "mocha"

server/test/cssfile.js

@@ -22,7 +22,7 @@ describe('cssfile', function(){
 		it('calls callback with errors', function(done){
 			var invalidCss = 'body{ background: red color: white}';
 			file = new cssfile(invalidCss, 'can be whatever', function(err){
-				err.should.not.be.null;
+				expect(err).to.not.be.null;
 				done();
 			});
 		});