heyu/lib/heyu.js

Simple heyu X10 relay

function Heyu() {
    this.x10confObject = {};
    this.x10confFileRead = "";
    this.heyuExecutable = "heyu"
    this.debug = null;
    this.x10sorted = [];
    this.x10grouped = [];
};

//reads x10.conf file, parsing for aliases in order to populate the x10config object
//assumed is alias line in format "alias <alias_name> <module_address> <module_type> # <group>
Heyu.prototype.readConfigFile = function(filename,callback) {
    that = this;
 
    //helper function 
    function x10sort_and_group() {
            //sorting groups
            that.x10sorted = [];
            that.x10grouped = [];
            
            for(var alias in that.x10confObject) {
                that.x10sorted.push(that.x10confObject[alias]);
            }
            that.x10sorted.sort(function(a,b) { 
                    return (a.group < b.group? -1 : (a.group == b.group ? (a.alias < b.alias ? -1 : 1) : 1));
            });
            
            var prevgroup = '';
            for(var i in that.x10sorted) {
                if (that.x10sorted[i].group !== prevgroup) {
                //insert here new group
                    if(prevgroup !== '') {
                    //if this is not the first group
                        newgroup = new Object();
                        newgroup.groupTitle = prevgroup;
                        newgroup.groupCode = prevgroupCode;
                        newgroup.devices = devices;
                        that.x10grouped.push(newgroup);
                    }
                    devices =  new Array();
                }
            //insert device  
            devices.push({"deviceTitle" : that.x10sorted[i].alias , "deviceCode" : that.x10sorted[i].address });
            prevgroupCode = that.x10sorted[i].address[0];
            prevgroup = that.x10sorted[i].group;
            }
            //and the last group to push
            newgroup = new Object();
            newgroup.groupTitle = prevgroup;
            newgroup.groupCode = prevgroupCode;
            newgroup.devices = devices;
            that.x10grouped.push(newgroup);
            
    }
 
 
 
    var fs = require('fs');
    
    if (!filename) {
        filename = "/etc/heyu/x10.conf";
    }
    
    
    fs.readFile(filename,encoding='ASCII', function (err,x10confData) {
        if (err) throw err;
        
        that.x10confFileRead = filename;
        var pattern = new RegExp('\nalias.*','ig');
        var match=[];
        while((match=pattern.exec(x10confData))!==null) {
            var line=match[0].split(/[ \t]+/);
            if ( line[3] == '#' )
                that.x10confObject[line[1]]={'alias':line[1],'address':line[2],'group':line[4].replace('_', ' '), 'groupHouse':line[2].substring(0,1)};
            else
                that.x10confObject[line[1]]={'alias':line[1],'address':line[2],'group':line[5].replace('_', ' '), 'groupHouse':line[2].substring(0,1)};
        }
    
        x10sort_and_group();
        
        process.nextTick(function(){
            callback(that.x10grouped);
        });
    });

};



Heyu.prototype.execHeyu = function (device, command, comparam, callback) {
        // validate command
        switch ( command ) {
        case 'alloff':
        case 'obdim':
        case 'on':
        case 'off':
            break; 
        default:
            callback( new Error('Heyu error: invalid command ' + command ));
            return;
        }

        var exec = require('child_process').execFile;


        console.log('Exec> '+this.heyuExecutable+' '+command+' '+device+' '+comparam);
        if (!this.debug) {
            exec(this.heyuExecutable, [ command+' '+device+' '+comparam ], callback);
        }
}



exports = module.exports = new Heyu();