JS Beautify hack to work with Blade directives (Laravel)

beautify-html.js

function Beautifier(html_source, options, js_beautify, css_beautify) {
    //Wrapper function to invoke all the necessary constructors and deal with the output.
    html_source = html_source || '';

    // BEGIN
    html_source = html_source.replace(/\{\{((?:(?!\}\}).)+)\}\}/g, function (m, c) {
        if (c) {
            c = c.replace(/(^[ \t]*|[ \t]*$)/g, '');
            c = c.replace(/'/g, ''');
            c = c.replace(/"/g, '"');
            c = encodeURIComponent(c);
        }
        return "{{" + c + "}}";
    });
    html_source = html_source.replace(/^[ \t]*@([a-z]+)([^\r\n]*)$/gim, function (m, d, c) {
        var ce = c;
        if (ce) {
            ce = ce.replace(/'/g, ''');
            ce = ce.replace(/"/g, '"');
            ce = "|" + encodeURIComponent(ce);
        }
        switch (d) {
            case 'break':
            case 'case':
            case 'continue':
            case 'csrf':
            case 'else':
            case 'elseif':
            case 'empty':
            case 'extends':
            case 'include':
            case 'includeFirst':
            case 'includeIf':
            case 'includeWhen':
            case 'inject':
            case 'json':
            case 'method':
            case 'parent':
            case 'stack':
            case 'yield':
                return "<blade " + d + ce + "/>";
            case 'section':
                if(c.match(/[ \t]*\([ \t]*['"][^'"]*['"][ \t]*\)/i)){
                   return "<blade " + d + ce + ">";
                } else {
                   return "<blade " + d + ce + "/>";
                }
            case 'show':
            case 'stop':
                return "</blade " + d + ce + ">";
            default:
                if (d.startsWith('end')) {
                    return "</blade " + d + ce + ">";
                } else {
                    return "<blade " + d + ce + ">";
                }
        }
    });
    // END
    
    ...
    
    var sweet_code = multi_parser.output.join('').replace(/[\r\n\t ]+$/, '');
                    
    // BEGIN
    sweet_code = sweet_code.replace(/^([ \t]*)<\/?blade ([a-z]+)\|?([^>\/]+)?\/?>$/gim, function (m, s, d, c) {
        if (c) {
            c = decodeURIComponent(c);
            c = c.replace(/&#39;/g, "'");
            c = c.replace(/&#34;/g, '"');
            c = c.replace(/^[ \t]*/g, '');
        } else {
            c = "";
        }
        if (!s) {
            s = "";
        }
        return s + "@" + d + c;
    });
    sweet_code = sweet_code.replace(/\{\{((?:(?!\}\}).)+)\}\}/g, function (m, c) {
        if (c) {
            c = decodeURIComponent(c);
            c = c.replace(/&#39;/g, "'");
            c = c.replace(/&#34;/g, '"');
            c = c.replace(/(^[ \t]*|[ \t]*$)/g, ' ');
        }
        return "{{" + c + "}}";
    });
    // END

    ...

    return sweet_code;
} 

@ammarsdc, @Malin88 I have done a little hackery to get this to work for more of the blade syntax. https://gist.github.com/valeryan/40a5fcc97edb21e310c412e48d62a792

It still has a few issues that I know of:

Extra indents are added to the formatting of else and elseif statement.
The empty tag can be used in two different ways and I have only programmed for one of them for now.

I will try and work out a few more kinks. @mpryvkin If you wanted to collab on this at some point I would be open. The author of js-beautify has said he is open to the idea of merging this if it can be tested. beautifier/js-beautify#845. My feeling though is that having js-beautify do this is really out of scope. I think I may go fork the laravel blade highlighter extension and see if it can be fixed. Like many of the popular vscode extensions, it appears to mostly be abandoned...

@valeryan

I don't see how it's out of scope for js-beautify since VSCode uses js-beautify internally. The most elegant solution is for the native reindent of VSC to function with templating DSL in popular web frameworks, and this makes sense, since people are using VSCode for popular web frameworks, not for C, C++ and Go. That being said, a 3rd party reindent is fine too.