Creating Instagram like ads algorithm in javascript

In this video we will discuss and check that how can we create our own algorithm like Facebook and Instagram to show ads between posts. we will create our Instagram like ads algorithm using javascript

CHECK THE CODE BELOW:

// suppose you have an array of post and an array of ads
// how can we insert ads between post?
// we want to make sure that ads are inserted for a given interval

// fist 10 post -> 4th is ad
// next 10 post -> 8th is ad
let postArray = [{
"albumId": 1,
"id": 1,
"title": "accusamus beatae ad facilis cum similique qui sunt",
"url": "https://via.placeholder.com/600/92c952",
"thumbnailUrl": "https://via.placeholder.com/150/92c952"
},
{
"albumId": 1,
"id": 2,
"title": "reprehenderit est deserunt velit ipsam",
"url": "https://via.placeholder.com/600/771796",
"thumbnailUrl": "https://via.placeholder.com/150/771796"
},
{
"albumId": 1,
"id": 3,
"title": "officia porro iure quia iusto qui ipsa ut modi",
"url": "https://via.placeholder.com/600/24f355",
"thumbnailUrl": "https://via.placeholder.com/150/24f355"
},
{
"albumId": 1,
"id": 4,
"title": "culpa odio esse rerum omnis laboriosam voluptate repudiandae",
"url": "https://via.placeholder.com/600/d32776",
"thumbnailUrl": "https://via.placeholder.com/150/d32776"
},
{
"albumId": 1,
"id": 5,
"title": "natus nisi omnis corporis facere molestiae rerum in",
"url": "https://via.placeholder.com/600/f66b97",
"thumbnailUrl": "https://via.placeholder.com/150/f66b97"
},
{
"albumId": 1,
"id": 6,
"title": "accusamus ea aliquid et amet sequi nemo",
"url": "https://via.placeholder.com/600/56a8c2",
"thumbnailUrl": "https://via.placeholder.com/150/56a8c2"
},
{
"albumId": 1,
"id": 7,
"title": "officia delectus consequatur vero aut veniam explicabo molestias",
"url": "https://via.placeholder.com/600/b0f7cc",
"thumbnailUrl": "https://via.placeholder.com/150/b0f7cc"
},
{
"albumId": 1,
"id": 8,
"title": "aut porro officiis laborum odit ea laudantium corporis",
"url": "https://via.placeholder.com/600/54176f",
"thumbnailUrl": "https://via.placeholder.com/150/54176f"
},
{
"albumId": 1,
"id": 9,
"title": "qui eius qui autem sed",
"url": "https://via.placeholder.com/600/51aa97",
"thumbnailUrl": "https://via.placeholder.com/150/51aa97"
},
{
"albumId": 1,
"id": 10,
"title": "beatae et provident et ut vel",
"url": "https://via.placeholder.com/600/810b14",
"thumbnailUrl": "https://via.placeholder.com/150/810b14"
},
{
"albumId": 1,
"id": 11,
"title": "nihil at amet non hic quia qui",
"url": "https://via.placeholder.com/600/1ee8a4",
"thumbnailUrl": "https://via.placeholder.com/150/1ee8a4"
},
{
"albumId": 1,
"id": 12,
"title": "mollitia soluta ut rerum eos aliquam consequatur perspiciatis maiores",
"url": "https://via.placeholder.com/600/66b7d2",
"thumbnailUrl": "https://via.placeholder.com/150/66b7d2"
},
{
"albumId": 1,
"id": 13,
"title": "repudiandae iusto deleniti rerum",
"url": "https://via.placeholder.com/600/197d29",
"thumbnailUrl": "https://via.placeholder.com/150/197d29"
},
{
"albumId": 1,
"id": 14,
"title": "est necessitatibus architecto ut laborum",
"url": "https://via.placeholder.com/600/61a65",
"thumbnailUrl": "https://via.placeholder.com/150/61a65"
},
{
"albumId": 1,
"id": 15,
"title": "harum dicta similique quis dolore earum ex qui",
"url": "https://via.placeholder.com/600/f9cee5",
"thumbnailUrl": "https://via.placeholder.com/150/f9cee5"
},
{
"albumId": 1,
"id": 16,
"title": "iusto sunt nobis quasi veritatis quas expedita voluptatum deserunt",
"url": "https://via.placeholder.com/600/fdf73e",
"thumbnailUrl": "https://via.placeholder.com/150/fdf73e"
},
{
"albumId": 1,
"id": 17,
"title": "natus doloribus necessitatibus ipsa",
"url": "https://via.placeholder.com/600/9c184f",
"thumbnailUrl": "https://via.placeholder.com/150/9c184f"
},
{
"albumId": 1,
"id": 18,
"title": "laboriosam odit nam necessitatibus et illum dolores reiciendis",
"url": "https://via.placeholder.com/600/1fe46f",
"thumbnailUrl": "https://via.placeholder.com/150/1fe46f"
},
{
"albumId": 1,
"id": 19,
"title": "perferendis nesciunt eveniet et optio a",
"url": "https://via.placeholder.com/600/56acb2",
"thumbnailUrl": "https://via.placeholder.com/150/56acb2"
},
{
"albumId": 1,
"id": 20,
"title": "assumenda voluptatem laboriosam enim consequatur veniam placeat reiciendis error",
"url": "https://via.placeholder.com/600/8985dc",
"thumbnailUrl": "https://via.placeholder.com/150/8985dc"
},
{
"albumId": 1,
"id": 21,
"title": "ad et natus qui",
"url": "https://via.placeholder.com/600/5e12c6",
"thumbnailUrl": "https://via.placeholder.com/150/5e12c6"
},
{
"albumId": 1,
"id": 22,
"title": "et ea illo et sit voluptas animi blanditiis porro",
"url": "https://via.placeholder.com/600/45601a",
"thumbnailUrl": "https://via.placeholder.com/150/45601a"
},
{
"albumId": 1,
"id": 23,
"title": "harum velit vero totam",
"url": "https://via.placeholder.com/600/e924e6",
"thumbnailUrl": "https://via.placeholder.com/150/e924e6"
},
{
"albumId": 1,
"id": 24,
"title": "beatae officiis ut aut",
"url": "https://via.placeholder.com/600/8f209a",
"thumbnailUrl": "https://via.placeholder.com/150/8f209a"
},
{
"albumId": 1,
"id": 25,
"title": "facere non quis fuga fugit vitae",
"url": "https://via.placeholder.com/600/5e3a73",
"thumbnailUrl": "https://via.placeholder.com/150/5e3a73"
},
{
"albumId": 1,
"id": 26,
"title": "asperiores nobis voluptate qui",
"url": "https://via.placeholder.com/600/474645",
"thumbnailUrl": "https://via.placeholder.com/150/474645"
},
{
"albumId": 1,
"id": 27,
"title": "sit asperiores est quos quis nisi veniam error",
"url": "https://via.placeholder.com/600/c984bf",
"thumbnailUrl": "https://via.placeholder.com/150/c984bf"
},
{
"albumId": 1,
"id": 28,
"title": "non neque eligendi molestiae repudiandae illum voluptatem qui aut",
"url": "https://via.placeholder.com/600/392537",
"thumbnailUrl": "https://via.placeholder.com/150/392537"
},
{
"albumId": 1,
"id": 29,
"title": "aut ipsam quos ab placeat omnis",
"url": "https://via.placeholder.com/600/602b9e",
"thumbnailUrl": "https://via.placeholder.com/150/602b9e"
},
{
"albumId": 1,
"id": 30,
"title": "odio enim voluptatem quidem aut nihil illum",
"url": "https://via.placeholder.com/600/372c93",
"thumbnailUrl": "https://via.placeholder.com/150/372c93"
},
{
"albumId": 1,
"id": 31,
"title": "voluptate voluptates sequi",
"url": "https://via.placeholder.com/600/a7c272",
"thumbnailUrl": "https://via.placeholder.com/150/a7c272"
},
{
"albumId": 1,
"id": 32,
"title": "ad enim dignissimos voluptatem similique",
"url": "https://via.placeholder.com/600/c70a4d",
"thumbnailUrl": "https://via.placeholder.com/150/c70a4d"
},
{
"albumId": 1,
"id": 33,
"title": "culpa ipsam nobis qui fuga magni et mollitia",
"url": "https://via.placeholder.com/600/501fe1",
"thumbnailUrl": "https://via.placeholder.com/150/501fe1"
},
{
"albumId": 1,
"id": 34,
"title": "vitae est facere quia itaque adipisci perferendis id maiores",
"url": "https://via.placeholder.com/600/35185e",
"thumbnailUrl": "https://via.placeholder.com/150/35185e"
},
{
"albumId": 1,
"id": 35,
"title": "tenetur minus voluptatum et",
"url": "https://via.placeholder.com/600/c96cad",
"thumbnailUrl": "https://via.placeholder.com/150/c96cad"
},
{
"albumId": 1,
"id": 36,
"title": "expedita rerum eaque",
"url": "https://via.placeholder.com/600/4d564d",
"thumbnailUrl": "https://via.placeholder.com/150/4d564d"
},
{
"albumId": 1,
"id": 37,
"title": "totam voluptas iusto deserunt dolores",
"url": "https://via.placeholder.com/600/ea51da",
"thumbnailUrl": "https://via.placeholder.com/150/ea51da"
},
{
"albumId": 1,
"id": 38,
"title": "natus magnam iure rerum pariatur molestias dolore nisi",
"url": "https://via.placeholder.com/600/4f5b8d",
"thumbnailUrl": "https://via.placeholder.com/150/4f5b8d"
},
{
"albumId": 1,
"id": 39,
"title": "molestiae nam ullam et rerum doloribus",
"url": "https://via.placeholder.com/600/1e71a2",
"thumbnailUrl": "https://via.placeholder.com/150/1e71a2"
},
{
"albumId": 1,
"id": 40,
"title": "est quas voluptates dignissimos sint praesentium nisi recusandae",
"url": "https://via.placeholder.com/600/3a0b95",
"thumbnailUrl": "https://via.placeholder.com/150/3a0b95"
},];

let adsArray = [{"title": "ad1", description: "dasdsdsddd", url: "https//:www.codesikho.com"},
{"title": "ad2", description: "dsax", url: "https//:www.codesikho.com"},
{"title": "ad3", description: "dkasmdkmsad", url: "https//:www.codesikho.com"},
{"title": "ad4", description: "qwssdsd", url: "https//:www.codesikho.com"},
{"title": "ad5", description: "ksdksmdkm", url: "https//:www.codesikho.com"}];

let currentAdCount = 0;
let isFirstTen = true;
let newArray = [];
for (let index in postArray) {
if (index % 10 === 0 && parseInt(index) !== 0) {
isFirstTen = !isFirstTen;
} else if (index % 10 === 3 && isFirstTen) {
newArray.push(adsArray[currentAdCount]);
if (currentAdCount === adsArray.length - 1) {
currentAdCount = 0;
} else {
currentAdCount += 1;
}
} else if (index % 10 === 7 && !isFirstTen) {
newArray.push(adsArray[currentAdCount]);
if (currentAdCount === adsArray.length - 1) {
currentAdCount = 0;
} else {
currentAdCount += 1;
}
}
newArray.push(postArray[parseInt(index)]);
}
console.log(newArray);
// time complexity -> O(n) -> linear time complexity



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