endive-util/endive-util.js

utils for endive

var os = require( 'os' );
var util = require( 'util' );

module.exports.getLocalIPs = function ( family ) {
    if ( arguments.length == 0 ) {
        family = 'IPv4';
    }
    var addresses = [];
    var interfaces = os.networkInterfaces();
    for ( var i in interfaces )
    {
        interfaces[i].forEach( function ( contents )
        {
            if ( contents.family == family ) {
                addresses.push( contents.address );
            }
        });
    }
    return addresses;
};

module.exports.filterObjectsFromArray = function ( array , objects , key ) {
    var results = [];
    var length = array.length;
    var objLength = objects.length;
    for ( var i = 0 ; i < length ; i++ )
    {
        var value = array[i];
        for ( var j = 0 ; j < objLength ; j++ )
        {
            var object = objects[j];
//            console.log ( object[key] + ' == ' + value );
            if ( object[key] == value )
            {
                results.push( object );
                console.log( 'register : ' + object.host + ':' + object.port + '\n' );
            }
        }
    }
    return results;
};

function extractArguments( func ) {
    var funcstring = null;
    if ( typeof func === 'function' )
    {
        funcstring = func.toString();
    }
    else
    {
        funcstring = func;
    }
    var begin = funcstring.indexOf( '(' ) + 1;
    var end = funcstring.indexOf( ')' , begin ) - 1;
    if ( begin < end )
    {
        var argstring = funcstring.substring( begin , end ).replace( / /g , '' );
        var args = argstring.split( ',' );
        var length = args.length;
        if ( length > 0 )
        {
            return args;
        }
    }
    return null;
};

module.exports.extractArguments = extractArguments;

module.exports.dynamicCall = function( func , sortedArgs , specificArgs , funcOwner ) {
    var funcstring = null;
    var defaultCall = true;
    var specificArgKeys = Object.keys( specificArgs );
    if ( specificArgKeys != null && specificArgKeys.length > 0 )
    {
        var inputArgs = null;
        var args = extractArguments( func );
        if ( args != null )
        {
            inputArgs = [];
            defaultCall = false;
            var index = 0;
            var length = args.length;
            for( var i = 0 ; i < length ; i++ )
            {
                var sIndex = specificArgKeys.indexOf( args[i] );
                if( sIndex >= 0 )
                {
                    inputArgs.push( specificArgs[specificArgKeys[sIndex]] );
                }
                else
                {
                    inputArgs.push( sortedArgs[index] );
                    index++;
                }
            }
        }
    }
    if ( defaultCall )
    {
        inputArgs = sortedArgs;
    }
    funcOwner = funcOwner || null;
    func.apply( funcOwner , inputArgs );
};

module.exports.format = function() {
    return util.format.apply( util , arguments );
};

module.exports.log = function() {

    util.log( util.format.apply ( util , arguments ) );
};

module.exports.debug = function() {

    util.debug( util.format.apply ( util , arguments ) );
};

module.exports.error = function() {

    util.error( util.format.apply ( util , arguments ) );
};