Spobniz.js

Spobniz.js

'use strict'
require('dotenv').config();
const request = require('request');
//同期処理のため
const sync_request = require('sync-request');
// obniz認証情報
const obniz_id = process.env.OBNIZ_ID;
const Obniz = require('obniz');
const obniz = new Obniz(obniz_id);
// spotify認証情報(.envから読み込む)
const access_token = process.env.ACCESS_TOKEN;
const client_id = process.env.CLIENT_ID; // Your client id
const client_secret = process.env.CLIENT_SECRET; // Your secret
const redirect_uri = process.env.REDIRECT_URI; // Your redirect urico
//日本語対応
const { createCanvas } = require('canvas');
// ヘッダー情報
let headers = {
    'Accept': 'application/json',
    'Content-Type': 'application/json',
    'Authorization': `Bearer ${access_token}`
};

obniz.onconnect = async function () {
    // RGB LEDを呼び出す
    var rgbled = obniz.wired('WS2811', { gnd: 0, vcc: 1, din: 2 });
    var state = await obniz.switch.getWait();
    // スイッチの反応を常時監視
    obniz.switch.onchange = function (state) {
        var result = getTrackInfo();
        if (state === 'push') {
            var is_playing = result['is_playing'];
            // 再生
            if (!is_playing) {
                playTrack();
                // 停止
            } else {
                pauseTrack();
            }
            // ディスプレイ処理
            obniz.display.clear();
            const r = random(0, 255);
            const g = random(0, 255);
            const b = random(0, 255);
            console.log(r, g, b);
            rgbled.rgb(r, g, b);
        } else if (state == 'none') {
            //曲情報を表示
            var info = getDispInfo(result);
            obniz.display.clear();
        } else if (state === 'right') {
            // 早送り
            console.log('skip');
            rgbled.rgb(0, 255, 0);
            skipTrack();
            obniz.display.clear();
            obniz.display.print('skip');
        } else if (state === 'left') {
            rgbled.rgb(255, 0, 255);
            backTrack();
            obniz.display.clear();
            obniz.display.print('back');
        }
    }
    setInterval(async function () {
        var result = getTrackInfo();
        if (state == 'none' && result['is_playing']) {
            rgbled.rgb(random(0, 255), random(0, 255), random(0, 255));
        } else {
            rgbled.rgb(0, 0, 0);
        }
    }, 1200);
    setInterval(async function () {
        if (state == 'none') {
            var result = getTrackInfo();
            var info = getDispInfo(result);
            console.log(info);
            const canvas = createCanvas(128, 64);
            const ctx = canvas.getContext('2d');
            ctx.fillStyle = "white";
            ctx.font = "15px Avenir";
            ctx.fillText(info, 0, 40);
            obniz.display.draw(ctx);
        }
    }, 3000);
}
// RGBをランダムで
var random = function (min, max) {
    min = Math.ceil(min);
    max = Math.floor(max);
    return Math.floor(Math.random() * (max - min)) + min; //The maximum is exclusive and the minimum is inclusive
}
// 再生
function playTrack() {
    console.log("play func");
    var options = {
        url: 'https://api.spotify.com/v1/me/player/play',
        method: 'PUT',
        headers: headers,
    };

    function callback(error, response, body) {
        if (!error && response.statusCode == 200) {
            console.log("success");
            return body;
        }
    }
    request(options, callback);
}

// 巻き戻し
function backTrack() {
    console.log("back func");
    var options = {
        url: 'https://api.spotify.com/v1/me/player/previous',
        method: 'POST',
        headers: headers
    };

    function callback(error, response, body) {
        if (!error && response.statusCode == 200) {
            console.log(body);
        }
    }
    request(options, callback);
}

// 早送り
function skipTrack() {
    console.log("skip func");
    var options = {
        url: 'https://api.spotify.com/v1/me/player/next',
        method: 'POST',
        headers: headers
    };

    function callback(error, response, body) {
        if (!error && response.statusCode == 200) {
            console.log(body);
        }
    }
    request(options, callback);
}

//  再生中の曲を取得
function getTrackInfo() {
    var response = sync_request(
        'GET',
        'https://api.spotify.com/v1/me/player/currently-playing', {
        headers: headers,
    });
    return JSON.parse(response.getBody('utf8'));
}

// ディスプレイ表示用の曲情報
function getDispInfo(data) {
    var title = data["item"]["name"];
    var name = data["item"]["artists"]["0"]["name"];
    return title + "\n" + name;
}

// 停止
function pauseTrack() {
    console.log("stop func");
    var options = {
        url: 'https://api.spotify.com/v1/me/player/pause',
        method: 'PUT',
        headers: headers
    };

    function callback(error, response, body) {
        if (!error && response.statusCode == 200) {
            console.log(body);
        }
    }
    request(options, callback);
}