ham.js

function HAM(machineState, incomingState, currentState, incomingValue, currentValue){
    if(machineState < incomingState){
        return {defer: true};
    }
    if(incomingState < currentState){
        return {historical: true};
    }
    if(currentState < incomingState){
        return {converge: true, incoming: true};
    }
    if(incomingState === currentState){
        incomingValue = Lexical(incomingValue) || "";
        currentValue = Lexical(currentValue) || "";
        if(incomingValue === currentValue){
            return {state: true};
        }
        if(incomingValue < currentValue){
            return {converge: true, current: true};
        }
        if(currentValue < incomingValue){
            return {converge: true, incoming: true};
        }
    }
    return {err: "Invalid CRDT Data: "+ incomingValue +" to "+ currentValue +" at "+ incomingState +" to "+ currentState +"!"};
}
var Lexical = JSON.stringify


HAM.mix = function(change, graph){
    var machine = (+new Date), diff;
    Object.keys(change).forEach(function(soul){
        var node = change[soul];
        Object.keys(node).forEach(function(key){
            var val = node[key];
            if('_' == key){ return }
            var state = node._['>'][key];
            var was = (graph[soul]||{_:{'>':{}}})._['>'][key] || -Infinity;
            var known = (graph[soul]||{})[key];
            var ham = HAM(machine, state, was, val, known);
            if(!ham.incoming){
                if(ham.defer){
                    console.log("DEFER", key, val);
                    // you'd need to implement this yourself.
                }
                return;
            }
            (diff || (diff = {}))[soul] = diff[soul] || {_:{'#':soul, '>':{}}};
            graph[soul] = graph[soul] || {_:{'#':soul, '>':{}}};
            graph[soul][key] = diff[soul][key] = val;
            graph[soul]._['>'][key] = diff[soul]._['>'][key] = state;
        })
    });
    return diff;
}

try{module.exports = HAM}catch(e){}