nging/index.js

Template engine based on jml.

var util = require("util");

function checkType(object, typeName) {
    return toString.apply(object)=="[object "+typeName+"]";
}

function tag(component, props, isTail) {   
    var pstr = "";
    for (key in props) {
        pstr += " "+key+"=\""+props[key]+"\"";
    }

    return "<"+(isTail?"/":"")+String(component)+pstr+">";
}

function addTabForEachLine(text) {
    return text.split("\n").map(function(line) {
        return "    "+line;
    }).join("\n");
}

function render(jml) {
    if (checkType(jml,'String')) {
        return jml;
    };
    var component = jml[0];
    var props, nodes;

    if  (jml.length>1 && checkType(jml[1], 'Object')) {
        props = jml[1];
        nodes = jml.slice(2);
    } else {
        props = {};
        nodes = jml.slice(1) || [];
    }

    if (!checkType(component,'String')) {
        var c = new component();
//        c.init(props, nodes);
        c.props = props?props:{};
        c.props.nodes = nodes;
        return render(c.jml());
    };

    var html="";

    for (key in nodes) {
        if (nodes.length>1) {
            html+="\n"+addTabForEachLine(render(nodes[key]));
        } else {
            html+= render(nodes[key]);
        }
    }

    html+=nodes.length>1?"\n":"";

    return tag(component,props)+html+tag(component,{},true); 
}

// function Component() {
//     this.props = {};
//     this.props.nodes = [];
// }

// function create(json) {
//     var NewComponent = {};

//     util.inherits(NewComponent, Component);

//     NewComponent.prototype.jml = json.jml;

//     return NewComponent;
// }


var nging = {};

nging.render = render;
//engen.create = create;

module.exports = nging;