welsonjs/app.js

//////////////////////////////////////////////////////////////////////////////////
//
//    app.js
//
//    Bootstrap code for running a javascript app in windows.  Run as:
//
//    cscript.js app.js <appname> <app arguments> ...
//
/////////////////////////////////////////////////////////////////////////////////
// "use strict";

/////////////////////////////////////////////////////////////////////////////////
// Bootstrap code, basic module loading functionality
/////////////////////////////////////////////////////////////////////////////////

//
//    The module loaded is run inside a function, with one argument, global which
//    points to the global context.  So global.FN is the same as FN (as long as a
//    version of FN does not exist in local scope).
//
//    The module should return its interface at the end of the script.  The basic
//    pattern for a module is:-
//
//    var module = { ... };
//    return module;
//
//    Or:-
//
//    return function() {
//    }
//
//    The appname argument causes <appname>.js to be loaded. The interface returned
//    must define main = function(args) {}, which is called once the module is
//    loaded.

var console = {
   log: function(msg, status) {
       if(typeof(window) !== 'undefined') {
           alert(msg);
       } else if(typeof(WScript) !== 'undefined') {
           WScript.echo(msg);
           WScript.quit(status);
       }
    }
};

function CreateObject(n) {
    return new ActiveXObject(n);
}

function require(FN) {
    var cache = require.__cache = require.__cache || {};
    if (FN.substr(FN.length - 3) !== '.js') FN += ".js";
    if (cache[FN]) return cache[FN];
    var FSO = CreateObject("Scripting.FileSystemObject");
    var T = null;
    try {
        var TS = FSO.OpenTextFile(FN, 1);
        if (TS.AtEndOfStream) return "";
        T = TS.ReadAll();
        TS.Close();
        TS = null;
    } catch (e) {
        console.log("LOAD ERROR! " + e.number + ", " + e.description + ", FN=" + FN, 1);
        return;
    }
    FSO = null;
    T = "(function(global){\n" + '"use strict";' + "\n" + T + "})(this);\n\n////@ sourceURL=" + FN;
    try {
        cache[FN] = eval(T);
    } catch (e) {
        console.log("PARSE ERROR! " + e.number + ", " + e.description + ", FN=" + FN, 1);
    }
    if ("VERSIONINFO" in cache[FN]) console.log(cache[FN].VERSIONINFO);
    return cache[FN];
}

/////////////////////////////////////////////////////////////////////////////////
// Load script, and call app.main()
/////////////////////////////////////////////////////////////////////////////////

function init_console() {
    var arguments = WScript.arguments;
    if (arguments.length > 0) {
        var args = [];
        for (var i = 0; i < arguments.length; i++) {
            args.push(WScript.arguments(i));
        }
        var name = args.shift();
        var app = require(name);
        if (app) {
            if (app.main) {
                var exitstatus = app.main.call(app, args);
                if (typeof exitstatus != undefined) {
                    WScript.quit(exitstatus);
                }
            } else {
                console.log("Error, missing main entry point in " + name + ".js", 1);
            }
        } else {
            console.log("Error, cannot find " + name + ".js", 1);
        }
    }
}

function init_window(name, args) {
    var app = require(name);
    if (app) {
        if (app.main) {
            app.main.call(app, args);
            return true;
        } else {
            return false;
        }
    } else {
        return false;
    }
}

function main() {
    if(typeof(window) == 'undefined') {
        init_console();
    } else {
        console.log("welcome");
    }
}

main();