index.js

const canvas = document.getElementById("confetti")
const confetti = new JSConfetti({
    canvas
})

const possibleBingos = [
    [0, 1, 2, 3, 4],
    [5, 6, 7, 8, 9],
    [10, 11, 12, 13, 14],
    [15, 16, 17, 18, 19],
    [20, 21, 22, 23, 24],

    [0, 5, 10, 15, 20],
    [1, 6, 11, 16, 21],
    [2, 7, 12, 17, 22],
    [3, 8, 13, 18, 23],
    [4, 9, 14, 19, 24],

    [0, 6, 12, 18, 24],
    [20, 16, 12, 8, 4],
]

// Get the month and seed
const urlParams = new URLSearchParams(location.search)

const params = {}

function stringToNumber(str) {
    // Keep the old seeds working
    let numeric = true
    for (let c of str) {
        if (c < "0" || c > "9") {
            numeric = false
            break
        }
    }
    if (numeric) {
        return parseInt(str)
    }

    // Handle alphanumerical seeds
    let result = 0
    Array.from(str).forEach((c) => {
        result = result * 0x10ffff + c.codePointAt(0)
        result = result % 0x00E67102
    })
    return result
}

if (urlParams.has("username")) {
    params.seed = stringToNumber(urlParams.get("username").toLowerCase())
} else {
    params.seed = stringToNumber('coalesceconf')
}

// Next two functions taken from https://stackoverflow.com/a/53758827/7595722
// With some slight modification to make them look nicer
function shuffle(array, seed) {
    let m = array.length
    let t
    let i

    while (m) {
        i = Math.floor(random(seed) * m--)

        t = array[m]
        array[m] = array[i]
        array[i] = t
            ++seed
    }

    return array
}

function random(seed) {
    var x = Math.sin(seed) * 10000
    return x - Math.floor(x)
}

function createBingoCell(name, receipt) {
    const cell = document.createElement("td")
    console.log(name)
    if (receipt === "") {
        if (name === "") {
            cell.innerHTML = "<p>I'm empty!<a href='https://github.com/izzymiller/coalesce-bingo/edit/main/events.json'> Fill me in with a great bingo card </a></p>"
            cell.className = "cell-empty"
        } else {
            cell.innerHTML = `<p>${name}<p><br /> <a target="_blank" href="https://github.com/izzymiller/coalesce-bingo/edit/main/events.json">this happened</a>`
            cell.className = "cell-unchecked"
        }

    } else {
        if (receipt.includes('http')) {
            cell.innerHTML = `<a href="${receipt}"><p>${name}</p></a>`
            cell.className = "cell-checked"
        } else {
            cell.innerHTML = `<div class="tooltipvisible">${name}<span class="receipt-text" style="width:350px">${receipt}</span></div>`
            // cell.innerHTML= `${name} <br /> <p class='receipt'>${receipt}</p>`
            cell.className = "cell-checked"
        }

    }
    return cell
}


function redirectToNewCard(username) {
    let url = window.location.href
    if (!url.indexOf("?") !== -1) {
        url = url.slice(0, url.indexOf("?"))
    }
    // url += `?username=${Math.floor(Math.random() * 99999)}`
    url += `?username=${username.toLowerCase()}`

    window.location.assign(url)
}

// Fetch the data
;
(async () => {
    const response = await fetch(`./events.json`)

    document.getElementById("loading").remove()

    if (response.status === 404) {
        // Whoops, looks like we haven't done this month's card yet
        const whoops = document.createElement("p")
        whoops.innerText =
            "Whoops, looks like we haven't made a card for this month yet, check back later"
        document.querySelector("body").appendChild(whoops)
        return
    }

    const title = document.createElement("h2")
    var username = urlParams.get("username")
    if (!username) {
        username = 'coalesceconf'
    }
    if (username == 'coalesceconf') {
        title.innerHTML = `<center>This is the default card, set to <a href="https://twitter.com/${username}">@${username}</a>. <br /> Get your own below!</center>`
    } else {
        title.innerHTML = `This card belongs to <a href="https://twitter.com/${username}">@${username.toLowerCase()}</a>`
    }

    document.querySelector("body").appendChild(title)
    const form = document.createElement('form')
    form.className = "usernameform"
    form.setAttribute("onsubmit", "redirectToNewCard()");

    var usernameInput = document.createElement("input");
    usernameInput.setAttribute("type", "text");
    usernameInput.setAttribute("name", "username");
    usernameInput.setAttribute("autocomplete", "off")
    usernameInput.setAttribute("placeholder", username);
    usernameInput.setAttribute('required', '')
    usernameInput.className = "usernameinput"; // set the CSS class
    document.querySelector("body").appendChild(usernameInput)
    form.appendChild(usernameInput);
    const newCard = document.createElement("button")
    newCard.setAttribute("type", "submit")
    newCard.className = 'formbutton'
    newCard.innerHTML = "Enter your Data Twitter username	 <br /> (or spy on someone else)"
    form.appendChild(newCard)
    document.querySelector("body").appendChild(form)



    const data = await response.json()

    const shuffled = shuffle(data, params.seed)
    const table = document.createElement("table")
    // We're going to do a new array so that the final card will be in one
    // smaller array just in case we have more than 24 options, and so that
    // we can include the free space
    const finalCard = []

    for (let i = 0; i < 5; i++) {
        const row = document.createElement("tr")

        for (let j = 0; j < 5; j++) {
            let cell
            if (i === 2 && j === 2) {
                // This is the free space
                cell = document.createElement("td")
                cell.innerHTML = '<div class="tooltipvisible">Free Space<span class="receipt-text" style="width:350px">You get this one for free :)</span></div>'
                cell.className = "cell-checked"
                finalCard.push({
                    name: "Free Space",
                    receipt: "free",
                })
            } else {
                const cellData = shuffled.shift()
                finalCard.push(cellData)
                cell = createBingoCell(cellData.name, cellData.receipt)
            }
            row.appendChild(cell)
        }

        table.appendChild(row)
    }

    document.querySelector("body").appendChild(table)

	//footer
	footer = document.createElement("p")
	footer.className = "me-footer"
	footer.innerHTML = '<p>Made by <a target="_blank" href="https://twitter.com/isidoremiller">@isidoremiller</a>. I work at <a href="https://hex.tech">hex</a>.</p>'
	document.querySelector("body").appendChild(footer)

    let numBingos = 0
    possibleBingos.forEach((line) => {
        if (
            line.every((index) => {
                return finalCard[index].receipt !== ""
            })
        )
            numBingos++
    })

    if (numBingos > 0) {
        setTimeout(() => {
            confetti.addConfetti({
                emojis: ['🌈', '⚡️', '💥', '✨', '💫', '🌸'],
				emojiSize: 100,
                confettiNumber: 20 * numBingos,
            })
        }, 1000)
        const marquee = document.getElementById("bingo")
        marquee.classList.remove("invis")
        marquee.innerText = `${numBingos} bingo${numBingos > 1 ? "s" : ""}`
    }

    if (numBingos === possibleBingos.length) {
        // Lets add a little easter egg just in case we fill a card
        const marquee = document.getElementById("bingo")
        marquee.innerText = "🔥".repeat(500)
    }
})()