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Linkagram.ts
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Linkagram.ts
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import { buildTrie, isPrefix, isWord, TrieNode } from "../trie";
import { celebrate } from "../confetti";
import { loadStripe, Stripe } from "@stripe/stripe-js";
import { keyForDate, keyForToday } from "../key";
export interface LinkagramStatRequest {
hintsRemaining: number;
timeTaken: number;
streak: number;
maxStreak: number;
}
interface LetterTile {
index: number;
value: string;
links: LetterTile[];
}
interface WordList {
byLength: { [key: number]: string[] };
words: Set<string>;
}
interface RandomDataGenerator {
pick(numbers: number[]): number;
weightedPick(letters: string[], count: number): string[];
}
enum FlashState {
Valid = "valid",
Invalid = "invalid",
AlreadyFound = "found",
}
interface LinkagramConfig {
id: number;
size: { width: number; height: number };
dictionary: string;
frequencies: string;
}
interface LinkagramState {
seed: number;
words: Set<string>;
hints: Map<string, Set<number>>;
startedAt: Date;
finishedAt: Date | null;
hintCount: number;
played: string[];
completed: string[];
streak: number;
maxStreak: number;
fixes: Set<string>;
save: (state: LinkagramState) => void;
purge: () => void;
}
const buildMulberry32 = (seed: number) => {
return () => {
var t = (seed += 0x6d2b79f5);
t = Math.imul(t ^ (t >>> 15), t | 1);
t ^= t + Math.imul(t ^ (t >>> 7), t | 61);
return ((t ^ (t >>> 14)) >>> 0) / 4294967296;
};
};
export default class Linkagram {
generator: RandomDataGenerator;
selectedIndexes: number[];
hoverIndex: number | undefined;
highlightedIndexes: Set<number>;
tiles: LetterTile[];
letterButtons: HTMLElement[];
wordsFoundButton: any;
wordList: WordList;
config: LinkagramConfig;
wordListPopup: any | undefined;
state: LinkagramState;
stripe: Stripe | null;
currentModals: HTMLElement[];
constructor(data: LinkagramConfig, state: LinkagramState) {
this.selectedIndexes = [];
this.highlightedIndexes = new Set();
this.letterButtons = [];
this.tiles = [];
this.wordList = {
byLength: [],
words: new Set(),
};
this.state = state;
this.config = data;
this.stripe = null;
this.currentModals = [];
const prng = buildMulberry32(state.seed);
this.generator = {
pick: (array) => {
return array[Math.floor(prng() * array.length)];
},
weightedPick: (letters, count) => {
const weightedArray: string[] = [];
letters.forEach((letter, i) => {
let numberOfTimes = 0;
if (i < 12) {
numberOfTimes = 7;
} else if (i < 20) {
numberOfTimes = 3;
} else if (i < 23) {
numberOfTimes = 2;
} else {
numberOfTimes = 1;
}
for (let count = 0; count < numberOfTimes; count++) {
weightedArray.push(letter);
}
});
// Shuffle the weighted array
let currentIndex = weightedArray.length;
let randomIndex = 0;
while (currentIndex != 0) {
randomIndex = Math.floor(prng() * currentIndex);
currentIndex--;
// And swap it with the current element.
[weightedArray[currentIndex], weightedArray[randomIndex]] = [
weightedArray[randomIndex],
weightedArray[currentIndex],
];
}
// pick the first elements up to however many we want to take
return weightedArray.slice(0, count);
},
};
}
buildTiles = (
board: { width: number; height: number },
frequencies: string[]
) => {
const numberOfTiles = board.width * board.height;
const tiles: LetterTile[] = [];
const key = keyForToday();
const specials: Record<string, string[]> = {
"2023731": "knvehinrparspyta".split(""), // 🐰 🥚 ❤️
"20231113": "vbikeosrlptdpyah".split(""), // 🎂
"20240310": "hrisetunvodgmlya".split(""), // 🤰
};
const values =
specials[key] ?? this.generator.weightedPick(frequencies, numberOfTiles);
for (let x = 0; x < numberOfTiles; x++) {
tiles.push({
index: x,
value: values[x],
links: [],
});
}
// generate links between letters
// for each tile, set the links
/*
0 1 2 3
4 5 6 7
8 9 10 11
12 13 14 15
*/
for (let x = 0; x < numberOfTiles; x++) {
// generate all surrounding indexes
let indexes = [
x - board.width - 1,
x - board.width,
x - board.width + 1,
x - 1,
x,
x + 1,
x + board.width - 1,
x + board.width,
x + board.width + 1,
];
// if it's blocked by being out of bounds or against a wall
// then the tiles aren't linked
tiles[x].links = indexes
.filter((linkIndex, idx) => {
return !(
linkIndex == x ||
linkIndex < 0 ||
linkIndex > numberOfTiles - 1 ||
(x % board.width == 0 && idx % 3 == 0) || // left column
((x + 1) % board.width == 0 && (idx + 1) % 3 == 0) || // right column
(x < board.width - 1 && idx < 3) || // top row
(x > numberOfTiles - (board.width + 1) && idx > 5)
); // bottom row
})
.map((i) => tiles[i]); // convert to reference to another tile
}
return tiles;
};
initialise = (words: string[], frequencies: string[]) => {
const trie = buildTrie(words);
// generate random letters
this.tiles = this.buildTiles(this.config.size, frequencies);
// Find all the words you should be able to get
this.wordList.words = this.findAllWords(this.tiles, trie);
this.wordList.words.forEach((word) => {
let arr = this.wordList.byLength[word.length] || [];
arr.push(word);
this.wordList.byLength[word.length] = arr;
});
Object.keys(this.wordList.byLength).forEach((k) =>
this.wordList.byLength[parseInt(k, 10)].sort()
);
};
showModal = (id: string) => {
return (e: Event) => {
e.preventDefault();
const modal = document.getElementById(id);
if (!modal) return;
modal.classList.add("is-active");
this.clearSelection();
this.currentModals.push(modal);
this.currentModals.forEach(
(m, i) => (m.style.zIndex = (i * 100).toString())
);
};
};
hideModal = (id: string) => {
return (e: Event) => {
e.preventDefault();
const modal = document.getElementById(id);
if (!modal) return;
modal.classList.remove("is-active");
this.currentModals = this.currentModals.filter((m) => m != modal);
};
};
run = async () => {
const [wordsResponse, frequenciesResponse] = await Promise.all([
fetch("/data/" + this.config.dictionary),
fetch("/data/" + this.config.frequencies),
]);
const words = await wordsResponse.json();
const frequencies = await frequenciesResponse.json();
this.initialise(words, frequencies);
const updateTileSelection = (x: number, y: number, submit: boolean) => {
const letter = document.elementFromPoint(x, y) as HTMLElement;
if (letter && letter.dataset.index) {
const index = parseInt(letter.dataset.index, 10);
const tile = this.tiles[index];
this.onTileSelected(tile, submit);
}
const currentWord = document.getElementById("current-word")!;
currentWord.style.left =
(x - currentWord.clientWidth / 2).toString() + "px";
currentWord.style.top = (y - 90).toString() + "px";
return letter;
};
// Draw the letters
const board = document.getElementById("board")?.children[0] as HTMLElement;
let firstTile: HTMLElement | undefined;
let selectedNewLetter = true;
board.addEventListener("pointerdown", (e: PointerEvent) => {
e.preventDefault();
const letter = document.elementFromPoint(
e.clientX,
e.clientY
) as HTMLElement;
const index = parseInt(letter.dataset.index!, 10);
// if this letter has already been picked previously
selectedNewLetter =
this.selectedIndexes.find((i) => i === index) === undefined;
firstTile = updateTileSelection(e.clientX, e.clientY, false);
});
board.addEventListener("pointermove", (e: PointerEvent) => {
e.preventDefault();
if (e.buttons) {
updateTileSelection(e.clientX, e.clientY, false);
}
});
board.addEventListener("pointerup", (e: PointerEvent) => {
e.preventDefault();
const letter = document.elementFromPoint(
e.clientX,
e.clientY
) as HTMLElement;
// if we lifted up on a different letter, no letter or a previously selected letter
if (!letter || letter != firstTile || !selectedNewLetter) {
// submit it
this.submitWord();
} else {
// otherwise highlight it
const index = parseInt(letter.dataset.index!, 10);
const tile = this.tiles[index];
// if this index is also our last
this.onTileSelected(tile, !selectedNewLetter);
}
});
this.letterButtons = this.tiles.map((tile) => {
const rowIndex = Math.floor(tile.index / this.config.size.width);
let row = board?.children[rowIndex];
if (!row) {
row = document.createElement("tr");
row.classList.add("board-row");
board?.appendChild(row);
}
const tableCell = document.createElement("td");
tableCell.classList.add("is-unselectable");
tableCell.innerHTML = `<div class="is-flex is-justify-content-center is-align-content-center"><a class="letter is-clickable is-uppercase">${tile.value}</a></div>`;
row?.appendChild(tableCell);
const letter = tableCell.children[0].children[0] as HTMLElement;
letter.dataset.value = tile.value;
letter.dataset.index = tile.index.toString();
return letter;
});
document
.getElementById("total-found")
?.addEventListener("click", this.showModal("wordlist-modal"));
document
.getElementById("wordlist-modal-close")
?.addEventListener("click", this.hideModal("wordlist-modal"));
document
.getElementById("wordlist-modal-background")
?.addEventListener("click", this.hideModal("wordlist-modal"));
document
.getElementById("hints-modal-close")
?.addEventListener("click", this.hideModal("hints-modal"));
document
.getElementById("hints-modal-background")
?.addEventListener("click", this.hideModal("hints-modal"));
document
.getElementById("show-hints")
?.addEventListener("click", this.showHintModal);
document
.getElementById("how-to-play-button")
?.addEventListener("click", this.showModal("how-to-play-modal"));
document
.getElementById("how-to-play-modal-close")
?.addEventListener("click", this.hideModal("how-to-play-modal"));
document
.getElementById("how-to-play-modal-close-ok")
?.addEventListener("click", this.hideModal("how-to-play-modal"));
document
.getElementById("how-to-play-modal-background")
?.addEventListener("click", this.hideModal("how-to-play-modal"));
document
.getElementById("stats-button")
?.addEventListener("click", this.showModal("stats-modal"));
document
.getElementById("stats-modal-close")
?.addEventListener("click", this.hideModal("stats-modal"));
document
.getElementById("stats-modal-background")
?.addEventListener("click", this.hideModal("stats-modal"));
document
.getElementById("share-button")
?.addEventListener("click", async () => {
try {
if (!navigator.share) return;
// if you've completed it
let text = `Found ${this.state.words.size} / ${this.wordList.words.size}`;
if (this.state.words.size === this.wordList.words.size) {
const finished = this.state.finishedAt!;
const started = this.state.startedAt;
const elapsed = finished.getTime() - started.getTime();
const hours = Math.floor((elapsed % 86400000) / 3600000);
const minutes = Math.round(
((elapsed % 86400000) % 3600000) / 60000
);
let hintsUsed = 0;
this.state.hints.forEach((hints, _word) => {
hintsUsed += hints.size;
});
const lines = [
`⌛ ${hours}h ${minutes}m`,
`💡 ${hintsUsed} ${hintsUsed == 1 ? "hint" : "hints"}`,
];
if (this.state.streak > 2) {
// add another fire for every 100 days
const fires = Array(Math.floor(this.state.streak / 100) + 1)
.fill("🔥")
.join("");
lines.push(`${fires} ${this.state.streak}`);
}
text = lines.join("\n");
}
await navigator.share({
title: "Linkagram",
text: text,
url: document.URL,
});
} catch (error) {
console.warn(error);
}
});
this.onWordListUpdated();
this.onSelectionChanged();
this.clearSelection();
this.onGameStarted();
};
onTileSelected = (tile: LetterTile | undefined, submit: boolean) => {
const lastIndex = this.selectedIndexes[this.selectedIndexes.length - 1];
if (tile?.index == lastIndex) {
if (submit) {
this.submitWord();
}
} else if (tile && this.selectedIndexes.length == 0) {
this.addTileToSelection(tile);
} else if (tile) {
// if this index is touching the last one
const touching =
tile.links.find((link) => link.index === lastIndex) !== undefined;
const alreadySelected =
this.selectedIndexes.find((idx) => idx === tile.index) !== undefined;
if (touching && !alreadySelected) {
this.addTileToSelection(tile);
} else if (!touching) {
this.clearSelection();
this.addTileToSelection(tile);
} else {
this.clearSelection();
}
}
this.onSelectionChanged();
};
submitWord = () => {
const word: string = this.selectedIndexes
.map((i) => this.tiles[i].value)
.join("");
const buttons: HTMLElement[] = this.selectedIndexes.map(
(i) => this.letterButtons[i]
);
if (this.state.words.has(word)) {
this.flashButtons(buttons, FlashState.AlreadyFound);
} else if (this.wordList.words.has(word)) {
this.onWordRevealed(word);
this.state.save(this.state);
this.flashButtons(buttons, FlashState.Valid);
this.onWordListUpdated();
} else {
this.flashButtons(buttons, FlashState.Invalid);
}
this.clearSelection();
};
wordListAsHTML = () => {
const sections = Object.keys(this.wordList.byLength)
.sort()
.map((length: string) => {
const words = this.wordList.byLength[parseInt(length)]
.map((word) => {
if (this.state.words.has(word)) {
return `<li class="is-unselectable"><a class="is-family-monospace" onclick="document.linkagram.define('${word}')">${word}</a></li>`;
} else {
const revealedIndexes = this.state.hints.get(word) || new Set();
const stillToGuess = Array(word.length)
.fill("_")
.map((placeholder, idx) =>
revealedIndexes.has(idx) ? word.charAt(idx) : placeholder
)
.join(" ");
return `<li class="is-unselectable"><a class="is-family-monospace" onclick="document.linkagram.hint('${word}')">${stillToGuess}</a></li>`;
}
})
.join("");
return `<p class="menu-label">${length} letters</p><ol class="menu-list">${words}</ol></p>`;
});
const hintsLeft = this.state.hintCount;
return `<aside class="menu"><div><a onclick="document.linkagram.showHintModal()">${hintsLeft} ${
hintsLeft === 1 ? "hint" : "hints"
} remaining</a></div>${sections.join("")}</aside>`;
};
increaseAvailableHints = (count: number) => {
this.state.hintCount += count;
this.state.save(this.state);
this.onWordListUpdated();
};
showHintModal = async (event: Event | undefined) => {
document.getElementById("hint-count")!.innerText =
this.state.hintCount.toString();
this.showModal("hints-modal")(event || new Event("hint"));
const onPaymentComplete = () => {
this.increaseAvailableHints(12);
document.getElementById("hints-modal")?.classList.remove("is-active");
};
const onPaymentError = (err: any) => {
document
.getElementById("payment-request-loading")
?.classList.remove("is-hidden");
document
.getElementById("payment-request-loading")
?.classList.remove("is-loading");
console.error(err);
};
if (!this.stripe) {
onPaymentError(new Error("unable to load stripe"));
return;
}
const stripe = this.stripe;
const paymentRequest = stripe.paymentRequest({
country: "GB",
currency: "gbp",
total: {
label: "12 linkagram hints",
amount: 99,
},
});
const elements = stripe.elements();
const prButton = elements.create("paymentRequestButton", {
paymentRequest,
});
(async () => {
document
.getElementById("payment-request-loading")
?.classList.remove("is-hidden");
document
.getElementById("payment-request-loading")
?.classList.add("is-loading");
const result = await paymentRequest.canMakePayment();
if (result) {
prButton.mount("#payment-request-button");
document
.getElementById("payment-request-loading")
?.classList.add("is-hidden");
} else {
document
.getElementById("payment-request-button")
?.classList.add("is-hidden");
}
})();
try {
const response = await fetch(`/hint_payment`, {
method: "POST",
headers: {
"content-type": "application/json;charset=UTF-8",
},
});
const clientSecretResponse = await response.json();
const clientSecret = clientSecretResponse.secret;
paymentRequest.on("paymentmethod", async (ev) => {
try {
const { paymentIntent, error: confirmError } =
await stripe.confirmCardPayment(
clientSecret,
{ payment_method: ev.paymentMethod.id },
{ handleActions: false }
);
if (confirmError) {
ev.complete("fail");
} else {
ev.complete("success");
if (paymentIntent.status === "requires_action") {
const { error } = await stripe.confirmCardPayment(clientSecret);
if (!error) {
} else {
onPaymentComplete();
}
} else {
onPaymentComplete();
}
}
} catch (err) {
onPaymentError(err);
}
});
} catch (err) {
onPaymentError(err);
}
};
hint = async (word: string) => {
if (this.state.hintCount === 0) {
this.showHintModal(undefined);
return;
}
// use our hint
this.state.hintCount -= 1;
const set = this.state.hints.get(word) || new Set();
const potentials = Array(word.length)
.fill(0)
.map((_, idx) => idx)
.filter((i) => !set.has(i));
set.add(this.generator.pick(potentials));
this.state.hints.set(word, set);
// if this hint would reveal the word
if (potentials.length == 1) {
this.onWordRevealed(word);
}
this.state.save(this.state);
this.onWordListUpdated();
};
define = async (word: string) => {
try {
const result = await fetch(
`https://api.dictionaryapi.dev/api/v2/entries/en/${word}`
);
const entry = (await result.json()) as [
{
word: string;
meanings: [{ definitions: [{ definition: string }] }];
}
];
const definition = entry[0]?.meanings[0]?.definitions[0]?.definition;
if (definition) {
alert(word + "\n\n" + definition);
}
} catch (err) {
console.log("Unable to find definition of " + word);
}
};
flashButtons = (buttons: HTMLElement[], state: FlashState) => {
buttons.forEach((button) => button.classList.add(state.valueOf()));
setTimeout(() => {
buttons.forEach((button) => button.classList.remove(state.valueOf()));
}, 250);
};
onWordListUpdated = () => {
const found = this?.state.words.size;
const total = this?.wordList.words.size;
const totalFound = document.getElementById("total-found");
totalFound!.innerText = `${found} / ${total}`;
const wordlist = document.getElementById("wordlist")!;
wordlist.innerHTML = this.wordListAsHTML();
const wordlistModal = document.getElementById("wordlist-modal-content")!;
wordlistModal.innerHTML = wordlist.innerHTML;
if (found === total) {
this.onGameEnded();
}
};
onGameStarted = async () => {
const key = keyForToday();
this.fixupIfRequired(key);
// if we haven't played this game before
// we don't just look at the last element as you might play different
// games (by modifying the URL)
let showHowToPlay = false;
if (!this.state.played.includes(key)) {
const yesterday = new Date();
yesterday.setDate(yesterday.getDate() - 1);
const yesterdaysKey = keyForDate(yesterday);
// have we ever played before?
if (this.state.played.length == 0) {
showHowToPlay = true;
}
// increase how many games we have played
this.state.played.push(key);
// record the time we started this particular board
this.state.startedAt = new Date();
// if we didn't complete yesterdays puzzle
if (!this.state.completed.includes(yesterdaysKey)) {
// soz no streak for you
this.state.streak = 0;
}
// go on then, have a minimum number of hints each day
this.state.hintCount = Math.max(this.state.hintCount, 4);
this.state.save(this.state);
this.onWordListUpdated();
}
this.onStatsUpdated();
if (showHowToPlay) {
this.showModal("how-to-play-modal")(new Event("onGameEnded"));
}
const stripeKey: string =
"pk_live_51MQ4wTDjdwEKhnhgi8jlWuTSTjrokSs6lBqHIFP9O6c7Sot00xW54LRCXprU1v2ToVuAoTnvr5gdOWG0jRKAyrZn00pWtSmzKq";
this.stripe = await loadStripe(stripeKey, { apiVersion: "2022-11-15" });
};
onGameEnded = () => {
const key = keyForToday();
// if we haven't already recorded the fact we completed this game then do it now
if (!this.state.completed.includes(key)) {
this.state.finishedAt = new Date();
this.state.completed.push(key);
this.state.streak += 1;
if (this.state.streak > this.state.maxStreak) {
this.state.maxStreak = this.state.streak;
}
this.state.purge();
this.state.save(this.state);
// submit the stats to the server
fetch(`/stats`, {
method: "POST",
headers: {
"content-type": "application/json;charset=UTF-8",
},
body: JSON.stringify({
hintsRemaining: this.state.hintCount,
timeTaken:
this.state.finishedAt.getTime() - this.state.startedAt.getTime(),
streak: this.state.streak,
maxStreak: this.state.maxStreak,
} as LinkagramStatRequest),
});
}
this.onStatsUpdated();
celebrate(() => this.showModal("stats-modal")(new Event("onGameEnded")));
};
onWordRevealed = (word: string) => {
this.state.words.add(word);
};
onStatsUpdated = () => {
const setState = (name: string, value: number) => {
const e = document.getElementById(name);
if (!e) return;
e.innerText = value.toString();
};
setState("stats-played", this.state.played.length);
setState("stats-completed", this.state.completed.length);
setState("stats-streak", this.state.streak);
setState("stats-max-streak", this.state.maxStreak);
};
fixupIfRequired = (key: string) => {
// We have a bug where we don't record the streak correctly
// Perform a one-time fix up of the streaks
const fixedStreaks = "streaks2";
if (!this.state.fixes.has(fixedStreaks)) {
this.state.streak = 0;
// go through our completed state and calculate the streak and maxStreak
// iterate through completed in reverse and find the first time that
// a key that can be parsed as a date is not equal to the previous day
// then we know that the streak ended there
let calculatedStreak = 0;
const fixedKeysForDate = (date: Date) => {
// this was broken and fixed up before, so we check both keys just in case
const paddedDayString = date.getDate().toString().padStart(2, "0");
const paddedMonthString = (date.getMonth() + 1)
.toString()
.padStart(2, "0");
const current =
date.getFullYear() + paddedMonthString + paddedDayString;
const previousBroken = parseInt(
[date.getFullYear(), date.getMonth() + 1, date.getDate()].join(""),
10
).toString();
return [current, previousBroken];
};
let current = new Date();
let idx = this.state.completed.length - 1;
while (idx >= 0) {
const x = this.state.completed[idx];
const currentKeys = fixedKeysForDate(current);
if (!currentKeys.includes(x)) {
console.log(`Streak ended at ${current.toDateString()}`);
break;
}
calculatedStreak += 1;
idx -= 1;
current.setDate(current.getDate() - 1);
}
this.state.streak = calculatedStreak;
if (calculatedStreak > this.state.maxStreak) {
this.state.maxStreak = calculatedStreak;
}
// record the fact we performed this fixup
this.state.fixes.add(fixedStreaks);
this.state.save(this.state);
}
};
addTileToSelection = (tile: LetterTile) => {
const previous: HTMLElement | undefined =
this.selectedIndexes.length === 0
? undefined
: this.letterButtons[
this.selectedIndexes[this.selectedIndexes.length - 1]
];
const next = this.letterButtons[tile.index];
this.selectedIndexes.push(tile.index);
if (previous) {
// draw an arrow linking previous to next
const svg = document.getElementById("connections")!;
let arrow = document.createElementNS(
"http://www.w3.org/2000/svg",
"line"
);
arrow.classList.add("connection");
const x1 =
previous.getBoundingClientRect().x +
previous.getBoundingClientRect().width / 2;
const x2 =
next.getBoundingClientRect().x +
previous.getBoundingClientRect().width / 2;
const y1 =
previous.getBoundingClientRect().y +
previous.getBoundingClientRect().height / 2;
const y2 =
next.getBoundingClientRect().y +
previous.getBoundingClientRect().height / 2;
arrow.setAttribute("stroke", "hsl(171, 100%, 41%)");
arrow.setAttribute("stroke-width", "6px");
arrow.setAttribute("x1", (x1 / svg.clientWidth) * 100 + "%");
arrow.setAttribute("y1", (y1 / svg.clientHeight) * 100 + "%");
arrow.setAttribute("x2", (x2 / svg.clientWidth) * 100 + "%");
arrow.setAttribute("y2", (y2 / svg.clientHeight) * 100 + "%");
svg?.appendChild(arrow);
}
// highlight every letter touching this last one
this.highlightedIndexes.clear();
tile.links.forEach((t) => this.highlightedIndexes.add(t.index));
const word = this.selectedIndexes.map((i) => this.tiles[i].value).join("");
const currentWord = document.getElementById("current-word")!;
currentWord.innerText = word;
currentWord.classList.add("has-word");
};
clearSelection = () => {
const svg = document.getElementById("connections");
svg!.innerHTML = ``;
this.selectedIndexes = [];
this.highlightedIndexes.clear();
const currentWord = document.getElementById("current-word")!;
currentWord.innerText = "";
currentWord.classList.remove("has-word");
this.onSelectionChanged();
};
onSelectionChanged = () => {
// go through each letter
// make sure it's in the right state based on the selectedIndexes, highlightedIndexes
this.letterButtons.forEach((button, idx) => {
const selected: boolean =
this.selectedIndexes.find((i) => i === idx) !== undefined;
const highlighted: boolean =
this.highlightedIndexes.has(idx) || this.selectedIndexes.length === 0;
button.classList.remove("selected", "highlighted");
if (selected) {
button.classList.add("selected");
} else if (highlighted) {
button.classList.add("highlighted");
}
});
};
findAllWords = (tiles: LetterTile[], trie: TrieNode) => {
interface LetterNode {
index: number;
value: string;
visited: Set<number>;
}
let toExplore: LetterNode[] = tiles.map((l) => {
return {
index: l.index,
value: "",
visited: new Set(),
};
});
let allWords = new Set<string>();
while (toExplore.length > 0) {
const node = toExplore.pop()!;
if (isWord(trie, node.value)) {
allWords.add(node.value);
}
if (!isPrefix(trie, node.value)) {
continue;
}
tiles[node.index].links
.map((l) => {
if (node.visited.has(l.index)) return undefined;
let updated = new Set(node.visited);
updated.add(l.index);
return {
index: l.index,
value: node.value + l.value,
visited: updated,
};
})
.filter((n) => !!n)
.forEach((child) => toExplore.push(child!));
}
return allWords;
};
}
export type { LinkagramState, LinkagramConfig };