wirejs/wire.js

function é(defaultValue)
{
    let value = undefined;
    let effects = [];
    let piping = é.pipeLine();
    let flag = 0;
    let version = 0;
    let diff = é.diff;
    let get = () => {
        return (flag & 2) ? piping.get(value) : value;
    };
    let set = (newValue) => {
        newValue = é.extract(newValue, value);
        (flag & 4) && (newValue = piping.set(newValue));
        if(diff(newValue,value))
        {
            (flag & 1) && effects.filter(e => e.o).forEach(k => k());
            value = newValue;
            version++;
            (flag & 1) && effects.map(e => e.f());
        }
    };
    let useEffect = (e) => {
        flag = flag | 1;
        let k = {
            f:e,
            o:undefined
        };
        requestAnimationFrame(()=> {
            k.o = e();
        })
        effects.push(k);
    }
    value = é.extract(defaultValue, value);
    return {
        get,
        set,
        useEffect,
        fp: é.fingerPrint,
        getVersion: () => version,
        equalTo: n => é.isSame(n, value),
        readLayer: (a,b) => {
            flag = flag | 2;
            piping.read(a,b)
        },
        writeLayer: (a,b) => {
            flag = flag | 4;
            piping.write(a,b)
        }
    }
}
é.isWire = n => n?.fp == é.fingerPrint;
é.extract = (e,v) => typeof e=='function'?e(v):e;
é.isSame = (a,b) => !é.diff(a,b);
é.fingerPrint = Symbol("wire");
é.useEffect = (fn, assoc) => 
{
    for (const wireVar of assoc)
    {
        if(é.isWire(wireVar))
        {
            wireVar.useEffect(fn);
        }
    }
};
é.diff = (a,b,c) => {
    let cursoryDiffResult = é.cDiff(a,b);
    if(cursoryDiffResult == é.cDiff.adiff)
    {
        return é.adiff(a,b,c||[])
    }else{
        return cursoryDiffResult == é.cDiff.some ? false : true;
    }
}
é.adiff = (a,b,c) => {
    if(c.includes(a) && c.includes(b))
    {
        console.error("Circular object detected !")
        return é.cObjectDiff(a,b);
    }
    let typea = a instanceof Array ? 0 : a.byteLength ? 1 : 2;
    let typeb = b instanceof Array ? 0 : b.byteLength ? 1 : 2;
    if(typea != typeb)
    {
        return true;
    }
    if(typea==0)
    {
        if(a.length != b.length)
        {
            return true
        }
        for(let k = 0; k < a.length; k++)
        {
            if(é.diff(a[k], b[k]))
            {
                return true
            }
        }
        return false
    }
    if(a instanceof Object)
    {
        if(Object.keys(a).length != Object.keys(b).length)
        {
            return true
        }
        c.push(a);
        c.push(b);
        for (const key in a)
        {
            if (Object.hasOwnProperty.call(a, key))
            {
                if(é.diff(a[key], b[key], c))
                {
                    return true
                }
            }
        }
        return false
    }
}
é.cArrDiff = (a,b) => {
    return a.length != b.length || !a.every((v,i) => a[i] === v)
};
é.cObjectDiff = (a,b) => {
    return é.cArrDiff(
        Object.keys(a),
        Object.keys(b)
    );
};
é.cDiff = (a,b) => {
    switch(typeof a)
    {
        case "undefined":
        case "function":{
            return typeof a == typeof b ? é.cDiff.some : é.cDiff.different
        }
        case "symbol":
        case "bigint":
        case "boolean":
        case "number":
        case "string":{
            return a === b ? é.cDiff.some : é.cDiff.different;
        }
        case "object":{
            return é.cDiff.adiff;
        }
    };
}
é.cDiff.adiff = -1;
é.cDiff.some = 0;
é.cDiff.different = 1;
é.pipeLine = () => {
    let k = {};
    let reads = [];
    let writes = [];
    k.read = (fn,pr) => reads.push({fn,pr});
    k.write = (fn,pr) => writes.push({fn,pr});
    k.get = (val) => {
        let fns = reads.sort((a,b) => (a?.pr|0) - (b?.pr|0)),
        real = val;
        for (const { fn } of fns) {
            fn( real, e => real = e );
        };
        return real;
    };
    k.set = (val) => {
        let fns = writes.sort((a,b) => (a?.pr|0) - (b?.pr|0)),
        real = val;
        for (const { fn } of fns) {
            fn( real, e => real = e );
        };
        return real;
    };
    return k;
}