Pseudo logic for temple doors

pseudo-with-event-detection.ts

// To keep track of timestamps
const timestamps = {
    inside: null,
    outside: null,
};

// `undefined` could be a third symbol like '5' or something
const insideRegister = [undefined, undefined];
const outsideRegister = [undefined, undefined];

// Following three lines are existing in your code. Check it out.
declare var signalInside;
declare var signalOutside;
declare var mixer;

// For later use
let lastPlayBackTime = null;

function eventProcessorInside(event) {
    // Update inside registers
    if(signalInside != insideRegister[1]) {
        insideRegister.shift();
        insideRegister[1] = signalInside;
        timestamps.inside = Date.now();
    }
    perform_the_logic();
}

function eventProcessorOutside(event) {
    // Update outside registers
    if(signalOutside != outsideRegister[1]) {
        outsideRegister.shift();
        outsideRegister[1] = signalInside;
        timestamps.outside = Date.now();
    }
    perform_the_logic();
}

function perform_the_logic() {
        // Detect rising edge in inside registers.
    // Outside registers is irrelevant because timestamp difference is all that matters
    let isInsideRisingEdge = insideRegister[0] == 0 && insideRegister[1] == 1;

    // If the conditions are correct and inside and outside timestamps are present
    if(isInsideRisingEdge && timestamps.inside != null && timestamps.outside != null) {
        let timeDiff = timestamps.inside - timestamps.outside;
        if(timeDiff > 0) {
            // someone is coming inside because
            // inside timestamp is later than outside timestamp
            timestamps.inside = null;
            timestamps.outside = null;

            // Make sure nothing is playing before attempting to start
            if(!mixer.isPlaying()) {
                mixer.startPlaying();
            }

            // You could use this last playback time to 
            // see how many seconds have elapsed and if mixer is still playing
            // You could take a decision on when to stop playing.
            // When playing is stopped reset the value of lastPlayBackTime back to null.
            lastPlayBackTime = Date.now();
        }
    }
}

attachEventListener('insideSensorEvent', eventProcessorInside);
attachEventListener('outsideSensorEvent', eventProcessorOutside);

pseudo-without-event-detection.ts

// To keep track of timestamps
const timestamps = {
    inside: null,
    outside: null,
};

// `undefined` could be a third symbol like '5' or something
const insideRegister = [undefined, undefined];
const outsideRegister = [undefined, undefined];

// Following three lines are existing in your code. Check it out.
declare var signalInside;
declare var signalOutside;
declare var mixer;

// For later use
let lastPlayBackTime = null;

while(true) {
    // Update inside registers
    if(signalInside != insideRegister[1]) {
        insideRegister.shift();
        insideRegister[1] = signalInside;
        timestamps.inside = Date.now();
    }

    // Update outside registers
    if(signalOutside != outsideRegister[1]) {
        outsideRegister.shift();
        outsideRegister[1] = signalInside;
        timestamps.outside = Date.now();
    }

    // Detect rising edge in inside registers.
    // Outside registers is irrelevant because timestamp difference is all that matters
    let isInsideRisingEdge = insideRegister[0] == 0 && insideRegister[1] == 1;

    // If the conditions are correct and inside and outside timestamps are present
    if(isInsideRisingEdge && timestamps.inside != null && timestamps.outside != null) {
        let timeDiff = timestamps.inside - timestamps.outside;
        if(timeDiff > 0) {
            // someone is coming inside because
            // inside timestamp is later than outside timestamp
            timestamps.inside = null;
            timestamps.outside = null;

            // Make sure nothing is playing before attempting to start
            if(!mixer.isPlaying()) {
                mixer.startPlaying();
            }

            // You could use this last playback time to 
            // see how many seconds have elapsed and if mixer is still playing
            // You could take a decision on when to stop playing.
            // When playing is stopped reset the value of lastPlayBackTime back to null.
            lastPlayBackTime = Date.now();
        }
    }
}