Basic Instagram Bot

bot.js

// Bot
(function() {
    function startBot(){
        // Open the modal dialog on the instagram page
        var items = document.querySelectorAll('a[href^="/p"]');
        items[9].click();

        // Define action promises
        function loadPost(){
            return new Promise(function(resolve, reject) {
                var rightButton = document.querySelector('a.coreSpriteRightPaginationArrow');
                if (rightButton) rightButton.click();

                setTimeout(function(){
                    console.log("loadPost done");
                    resolve();
                }, (5+Math.random()*10)*1000);
            });
        }

        function likePost(){
            const LIKE_PERCENT = 60;

            return new Promise(function(resolve, reject) {
                
                if (Math.random() > LIKE_PERCENT/100){
                    return resolve();                    
                }

                if (Math.random()<0.5){
                    var unlike = document.querySelector('div[role="dialog"]>article header+div+div>section>span:first-child>button [aria-label="Unlike"]');
                    if (unlike){
                        console.log("-> Already Liked");
                    } else {
                        var likeButton = document.querySelector('div[role="dialog"]>article header+div+div>section>span:first-child>button');
                        likeButton.click();
                        console.log("-> Liked");    
                    }
                }
                else {
                    var imageButton = document.querySelector('div[role="dialog"]>article header+div>div[role="button"]');
                    if (imageButton) {
                        var event = new MouseEvent('dblclick', {
                            'view': window,
                            'bubbles': true,
                            'cancelable': true
                        });    
                        imageButton.dispatchEvent(event);
                    }
                }                    

                setTimeout(function(){
                    console.log("likePost done");
                    resolve();
                }, (2+Math.random()*6)*1000);
            });
        }

        function commentPost(){
            const COMMENT_PERCENT = 100;

            return new Promise(function(resolve, reject) {
                if (Math.random() > COMMENT_PERCENT/100){
                    return resolve();
                }
                
                // Create random comment
                var comments2d = [["Yo","Hey","Whatup","Sup"],
                ["man","dude","pal","mate","bro", "how's it going ✌"],
                ["great looking","nice","dope","cool","gnarly","hot","sick","clean"],
                ["BMW","bimmer"],
                ["out there", ", looking good", ", looks clean ✨", ""],
                ["👍","👀","👆"],
                ["Good luck with the car!", "Check out our stickers!","Stay cool.","Check our windshield banners some time.","Keep it up!",":blue_car: bimmers for life!", "We make stickers, check our stuff some time!","Interested in custom vinyl stickers?"]];

                function getRandomInt(min, max) {
                    min = Math.ceil(min);
                    max = Math.floor(max);
                    return Math.floor(Math.random() * (max - min + 1)) + min;
                }

                var comment="";
                for (var words of comments2d){
                    word = words[getRandomInt(0,words.length-1)];
                    comment += word;
                    comment += " ";
                }
                console.log("Comment:" + comment);

                // Populate comment in textarea
                var textarea = document.querySelector('div[role="dialog"]>article form textarea');

                function appendCharacter(textarea, character){
                    // No frontend tool to type into textarea found
                    return new Promise(function(resolve, reject){
                        textarea.value = textarea.value + character;
                        setTimeout(function(){
                            resolve();
                        }, 100 + Math.random()*100);
                    });
                }

                function submitFormAndResolve(){
                    // Submit form
                    var submitButton = document.querySelector('div[role="dialog"]>article form button[type="submit"]');
                    // submitButton.click();
    
                    // Wait and resolve
                    setTimeout(function(){
                        console.log("commentPost done");
                        resolve();
                    }, (3+Math.random()*10)*1000);
                }
                console.log("Adding characters");
                var arrayOfCharacters = comment.split('');

                // Resolve promises sequentially
                // https://css-tricks.com/why-using-reduce-to-sequentially-resolve-promises-works/
                let result = arrayOfCharacters.reduce(function(accumulatorPromise, character){
                    return accumulatorPromise.then(() => {
                        console.log(character);
                        return appendCharacter(textarea, character);
                    });
                }, Promise.resolve());
                result.then(e => {
                    console.log("String entered");
                    submitFormAndResolve();
                });                  
            });
        }

        (async function loop() {
            var i = 0;
            var nPosts = 20;
            console.log("Liking " + nPosts + " posts...");
            while (1) {
                console.log("Attempt " + i);

                // Sleep at night
                var date = new Date();
                if (date.getHours() > 22 && date.getHours() < 10){
                    console.log("Sleeping 3 hours" + i);
                    await new Promise(function(resolve){
                        setTimeout(resolve, 3*60*60*1000);
                    });                    
                }
                
                if (++i < nPosts){
                    // Load and like post
                    await loadPost().then(likePost);
                } else {                    
                    // Wait 30+ minutes
                    var minutes = Math.round(30 + Math.random()*30);
                    console.log("Waiting " + minutes + " minutes...");
                    await new Promise(function(resolve){
                        setTimeout(resolve, minutes*60*1000);
                    }); 
                    
                    // Select number of posts to like
                    console.log("Liking " + nPosts + " posts...");                    
                    nPosts = i + 10+Math.round(Math.random()*30);
                }                
            }
        })();
    }

    setTimeout(startBot(), 2000);
})();