function capture()

in src/browser/CameraProxy.js [52:122]
31 lines of code
8 McCabe index (conditional complexity)

function capture (success, errorCallback, opts) {
    let localMediaStream;
    let targetWidth = opts[3];
    let targetHeight = opts[4];

    targetWidth = targetWidth === -1 ? 320 : targetWidth;
    targetHeight = targetHeight === -1 ? 240 : targetHeight;

    const video = document.createElement('video');
    const button = document.createElement('button');
    const parent = document.createElement('div');
    parent.style.position = 'relative';
    parent.style.zIndex = HIGHEST_POSSIBLE_Z_INDEX;
    parent.className = 'cordova-camera-capture';
    parent.appendChild(video);
    parent.appendChild(button);

    video.width = targetWidth;
    video.height = targetHeight;
    button.innerHTML = 'Capture!';

    button.onclick = function () {
        // create a canvas and capture a frame from video stream
        const canvas = document.createElement('canvas');
        canvas.width = targetWidth;
        canvas.height = targetHeight;
        canvas.getContext('2d').drawImage(video, 0, 0, targetWidth, targetHeight);

        // convert image stored in canvas to base64 encoded image
        const imageData = canvas.toDataURL('image/png');

        // stop video stream, remove video and button.
        // Note that MediaStream.stop() is deprecated as of Chrome 47.
        if (localMediaStream.stop) {
            localMediaStream.stop();
        } else {
            localMediaStream.getTracks().forEach(function (track) {
                track.stop();
            });
        }
        parent.parentNode.removeChild(parent);

        return success(imageData);
    };

    navigator.getUserMedia = navigator.getUserMedia ||
                             navigator.webkitGetUserMedia ||
                             navigator.mozGetUserMedia ||
                             navigator.msGetUserMedia;

    const successCallback = function (stream) {
        localMediaStream = stream;
        if ('srcObject' in video) {
            video.srcObject = localMediaStream;
        } else {
            video.src = window.URL.createObjectURL(localMediaStream);
        }
        video.play();
        document.body.appendChild(parent);
    };

    if (navigator.mediaDevices.getUserMedia) {
        navigator.mediaDevices.getUserMedia({ video: true, audio: false })
            .then(successCallback)
            .catch(errorCallback);
    } else if (navigator.getUserMedia) {
        navigator.getUserMedia({ video: true, audio: false }, successCallback, errorCallback);
    } else {
        alert('Browser does not support camera :(');
    }
}