video_player/src/video/api.js

/**
 * These are custom helper methods that are not native
 * to the HTMLMediaElement API. Pass in the native
 * Video element, state and optional desired value to
 * set. To be primarily used in `mapVideoElToProps`.
 */
export const togglePause = (videoEl, { paused }) => {
    if (paused) {
        videoEl.play();
        document.querySelector("#videoTitle").style.display = 'none';
    } else {
        videoEl.pause();
        document.querySelector("#videoTitle").style.display = '';
    }
};

export const setCurrentTime = (videoEl, state, value) => {
    videoEl.currentTime = value;
};

export const setVolume = (videoEl, state, value) => {
    videoEl.muted = false;
    videoEl.volume = value;
};

export const mute = (videoEl) => {
    videoEl.muted = true;
};

export const unmute = (videoEl) => {
    videoEl.muted = false;
};

export const toggleMute = (videoEl, { volume, muted }) => {
    if (muted || volume <= 0) {
        if (volume <= 0) {
            videoEl.volume = 1;
        }
        videoEl.muted = false;
    } else {
        videoEl.muted = true;
    }
};

export const toggleFullscreen = (videoEl, callback) => {
    videoEl.requestFullScreen =
        videoEl.requestFullscreen
        || videoEl.msRequestFullscreen
        || videoEl.mozRequestFullScreen
        || videoEl.webkitRequestFullscreen;
    document.exitFullscreen =
        document.exitFullscreen
        || document.msExitFullscreen
        || document.mozCancelFullScreen
        || document.webkitExitFullscreen;
    const fullscreenElement =
        document.fullscreenElement
        || document.msFullscreenElement
        || document.mozFullScreenElement
        || document.webkitFullscreenElement;
    if (fullscreenElement === videoEl) {
        document.querySelector('video').style.maxHeight = '100%';
        window.fullscreen = false;
        document.exitFullscreen();
    } else {
        document.querySelector('video').style.maxHeight = '100%';
        window.fullscreen = true;
        videoEl.requestFullScreen();
    }
};

export const showTrack = ({ textTracks }, track) => {
    hideTracks({ textTracks });
    track.mode = track.SHOWING || 'showing';
};

export const hideTracks = ({ textTracks }) => {
    for (var i = 0; i < textTracks.length; i++) {
        textTracks[i].mode = textTracks[i].DISABLED || 'disabled';
    }
};

export const toggleTracks = (() => {
    let previousTrack;
    return ({ textTracks }) => {
        let currentTrack = [...textTracks]
            .filter((track) => track.mode === track.SHOWING || track.mode === 'showing')[0];
        if (currentTrack) {
            hideTracks({ textTracks });
            previousTrack = currentTrack;
        } else {
            showTrack({ textTracks }, previousTrack || textTracks[0]);
        }
    }
})();

export const showSpeed = (videoEl, state, speed) => {
    let playbackrates = state.playbackrates;
    hideSpeeds(videoEl, { playbackrates });
    speed.mode = speed.SHOWING || 'showing';
    if (videoEl.dataset) {
        videoEl.dataset['playbackrates'] = JSON.stringify(playbackrates);
    } else {
        videoEl.setAttribute("data-playbackrates", JSON.stringify(playbackrates));
    }
    videoEl.playbackRate = speed.id;
};

export const hideSpeeds = (videoEl, state) => {
    let playbackrates = state.playbackrates;
    for (var i = 0; i < playbackrates.length; i++) {
        playbackrates[i].mode = playbackrates[i].DISABLED || 'disabled';
    }
};

export const toggleSpeeds = (() => {
    let previousSpeed;
    return (videoEl, state) => {
        let playbackrates = state.playbackrates;

        let currentSpeed = playbackrates
            .filter((item) => item.mode === 'showing')[0];

        if (currentSpeed) {
            hideSpeeds(videoEl, { playbackrates });
            previousSpeed = currentSpeed;
        } else {
            showSpeed(videoEl, { playbackrates }, previousSpeed || playbackrates[0]);
        }
    }
})();

/**
 * Custom getter methods that are commonly used
 * across video layouts. To be primarily used in
 * `mapStateToProps`
 */
export const getPercentageBuffered = ({ buffered, duration }) =>
    buffered && buffered.length && buffered.end(buffered.length - 1) / duration * 100 || 0;

export const getPercentagePlayed = ({ currentTime, duration }) =>
    currentTime / duration * 100;