Began writing an express backend

1 files changed, 416 insertions, 0 deletions

diff --git a/static/index.js b/static/index.js
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+"use strict";
+
+let CW = function(){
+	//   102 letter tiles
+	//   0 point : blanches × 2.
+	//   1 point : E ×15, A ×9, I ×8, N ×6, O ×6, R ×6, S ×6, T ×6, U ×6, L ×5
+	//   2 points : D ×3, G ×2, M ×3
+	//   3 points : B ×2, C ×2, P ×2
+	//   4 points : F ×2, H ×2, V ×2
+	//   8 points : J ×1, Q ×1
+	//   10 points : K ×1, W ×1, X ×1, Y ×1, Z ×1
+	let total_remaining_letters = 102;
+	let letters = {
+		JOKER:{count:2, points:0 },
+		E:{count:15, points:1}, A:{count:9, points:1}, I:{count:9, points:1}, N:{count:6, points:1}, O:{count:6, points:1}, R:{count:6, points:1}, S:{count:6, points:1}, T:{count:6, points:1}, U:{count:6, points:1}, L:{count:5, points:1},
+		D:{count:3, points:2}, G:{count:2, points:2}, M:{count:3, points:2},
+		B:{count:2, points:3}, C:{count:2, points:3}, P:{count:2, points:3},
+		F:{count:2, points:4}, H:{count:2, points:4}, V:{count:2, points:4},
+		J:{count:1, points:8}, Q:{count:1, points:8},
+		K:{count:1, points:10}, W:{count:1, points:10}, X:{count:1, points:10}, Y:{count:1, points:10}, Z:{count:1, points:10},
+	};
+	let cursor = undefined;
+	let placed = []; // a sorted array of letters to place
+
+	function makeBoardTileOnCLick(x, y) {
+		return function() {
+			let me = document.getElementById(["s", y, "_", x].join(""));
+			if (me.innerHTML === "") {
+				moveCursor(x, y);
+			} else if (me.classList.contains("placed")) {
+				moveFromBoardToRack(x, y, me);
+			} else if (cursor !== undefined && cursor.x == x && cursor.y == y) {
+				// if we just clicked the cursor, swap its direction
+				if (cursor.direction === "right") {
+					cursor.direction = "down";
+					me.innerHTML = "▼";
+				} else {
+					cursor.direction = "right";
+					me.innerHTML = "▶";
+				}
+			}
+		};
+	}
+	function makeRackTileOnClick(i) {
+		return function() {
+			if (cursor !== undefined) {
+				let me = document.getElementById(["l", i].join(""));
+				if (me.innerHTML != "") {
+					moveFromRackToBoard(me, cursor.x, cursor.y);
+				}
+			}
+		};
+	}
+
+	function moveCursor(x, y) {
+		if (cursor === undefined) {
+			// No previous cursor, just set the new position
+			cursor = { x: x, y: y};
+		} else {
+			// Remove the cursor from its former position
+			let src = document.getElementById(["s", cursor.y, "_", cursor.x].join(""));
+			src.innerHTML = "";
+			cursor.x = x;
+			cursor.y = y;
+		}
+		// try to guess word direction if several letters are already placed
+		let dst = document.getElementById(["s", y, "_", x].join(""));
+		if (placed.length >= 2 && placed[0].x === placed[1].x) {
+			cursor.direction = "down";
+			dst.innerHTML = "▼";
+		} else {
+			cursor.direction = "right";
+			dst.innerHTML = "▶";
+		}
+	}
+	function moveCursorForwardIfPossible() {
+		while(cursor.x < 15 && cursor.y < 15) {
+			if (cursor.direction === "right") {
+				cursor.x++;
+			} else {
+				cursor.y++;
+			}
+			if (cursor.x >= 15 || cursor.y >= 15) {
+				cursor = undefined;
+				return;
+			}
+			let dst = document.getElementById(["s", cursor.y, "_", cursor.x].join(""));
+			if (dst.innerHTML === "") {
+				if (cursor.direction === "right") {
+					dst.innerHTML = "▶";
+				} else {
+					dst.innerHTML = "▼";
+				}
+				return;
+			}
+		}
+	}
+
+	function moveFromBoardToRack(x, y, src) {
+		CWDATA.board[y][x] = "";
+		// Find the letter in the placed array
+		let n = undefined;
+		for(n=placed.length-1; n>=0; n--) {
+			if (placed[n].x === x && placed[n].y === y) {
+				break;
+			}
+		}
+		// Find a free spot on the rack
+		let i = 0;
+		let dst = undefined;
+		do {
+			dst = document.getElementById(["l", i].join(""));
+			if (dst.innerHTML == "")
+				break;
+			i++;
+		} while (i<7);
+		// Move the board letter to the rack
+		if (src.innerHTML.charAt(21) === "&") {
+			dst.innerHTML = "&nbsp;";
+		} else {
+			dst.innerHTML = src.innerHTML;
+		}
+		dst.classList.add("letter");
+		src.classList.remove("letter");
+		src.classList.remove("placed");
+		// Place the cursor in the freed spot
+		moveCursor(x, y);
+		// Remove the letter from the placed array
+		placed.splice(n, 1);
+		// update the validate button
+		updateUI();
+	}
+
+	function moveFromRackToBoard(src, x, y) {
+		let dst = document.getElementById(["s", y, "_", x].join(""));
+		if (src.innerHTML === "&nbsp;") {
+			let letter = prompt("Entrez la lettre à utiliser", "A");
+			if (letter === null || !/^[A-Za-z]$/.test(letter)) {
+				return;
+			}
+			letter = letter.toUpperCase();
+			dst.innerHTML = [letter, "<div class=\"points\">&nbsp;</div>"].join("");
+			CWDATA.board[y][x] = {joker: letter};
+		} else {
+			dst.innerHTML = src.innerHTML;
+			CWDATA.board[y][x] = dst.innerHTML.charAt(0);
+		}
+		dst.classList.add("letter");
+		dst.classList.add("placed");
+		src.classList.remove("letter");
+		src.innerHTML = "";
+		// insert in the placed sorted array
+		placed.push({x: cursor.x, y: cursor.y, letter: dst.innerHTML});
+		for (let i=placed.length-1;i>0 && placed[i].y <= placed[i-1].y && placed[i].x <= placed[i-1].x;i--) {
+			let tmp = placed[i];
+			placed[i] = placed[i-1];
+			placed[i-1] = tmp;
+		}
+		// advance the cursor
+		moveCursorForwardIfPossible();
+		// update the validate button and pending points
+		updateUI();
+	}
+
+	function isValidPlay() {
+		// special case of no letters placed
+		if (placed.length === 0) {
+			return false;
+		}
+		// common definitions
+		let connected = false;
+		let x = placed[0].x;
+		let y = placed[0].y;
+		const lastx = placed[placed.length-1].x;
+		const lasty = placed[placed.length-1].y;
+		if (y>0) { // we check if we are connected above the first letter
+			connected ||= CWDATA.board[y-1][x] != "";
+		}
+		if (x>0) { // we check if we are connected on the left of the first letter
+			connected ||= CWDATA.board[y][x-1] != "";
+		}
+		// check if the placed letters are aligned and complete connection checks on the first and last letters
+		let direction = undefined;
+		if (x === lastx) {
+			direction = "down";
+			if (x<14) { // we are going down so we check for a connection on the right of the first letter
+				connected ||= CWDATA.board[y][x+1] != "";
+			}
+			if (lasty<14) { // we check bellow the last letter
+				connected ||= CWDATA.board[lasty+1][x] != "";
+			}
+		}
+		if (y === lasty) {
+			direction = "right";
+			if (lastx<14) { // we are going right so we check for a connection bellow the first letter
+				connected ||= CWDATA.board[y+1][x] != "";
+			}
+			if (lastx<14) { // we check on the right of the last letter
+				connected ||= CWDATA.board[y][lastx+1] != "";
+			}
+		}
+		// Now we check around the placed letters
+		let i=1;
+		while(i<placed.length && !(x === lastx && y === lasty)) {
+			if (direction === "down") {
+				y++;
+			} else {
+				x++;
+			}
+			if (placed[i].x === x && placed[i].y === y) {
+				// check around this letter
+				if (direction === "down") {
+					if (x > 0) { // we check for connection on the left
+						connected ||= CWDATA.board[y][x-1] != "";
+					}
+					if (x < 14) { // we check for connection on the right
+						connected ||= CWDATA.board[y][x+1] != "";
+					}
+				} else {
+					if (y>0) { // we check for connection on top
+						connected ||= CWDATA.board[y-1][x] != "";
+					}
+					if (y < 14) { // we check for connection bellow
+						connected ||= CWDATA.board[y+1][x] != "";
+					}
+				}
+				i++;
+			} else {
+				if (CWDATA.board[y][x] === "") {
+					break;
+				}
+				connected = true;
+			}
+		}
+		return connected && i === placed.length;
+	}
+
+	function getNewWordsAndScores() {
+		function getLetterScore(letter, elt, modifiers) {
+			let multiplier = 1;
+			if (elt.classList.contains("placed")) {
+				if (elt.classList.contains("tl")) {
+					multiplier = 3;
+				} else if (elt.classList.contains("dl")) {
+					multiplier = 2;
+				}
+				if (elt.classList.contains("tw")) {
+					modifiers.push("tw");
+				} else if (elt.classList.contains("dw")) {
+					modifiers.push("dw");
+				}
+			}
+			if (typeof letter === "object") {
+				return 0;
+			}
+			return multiplier * letters[letter].points;
+		}
+		function getHorizontalWordFrom(x, y) {
+			let word = "";
+			let points = 0;
+			let modifiers = [];
+			// Go to the left
+			for(let i=x;i>=0 && CWDATA.board[y][i] != "";i--) {
+				let letter = CWDATA.board[y][i];
+				let elt = document.getElementById(["s", y, "_", i].join(""));
+				let p = getLetterScore(letter, elt, modifiers);
+				if (typeof letter === "object") {
+					word = letter.joker + word;
+				} else {
+					word = letter + word;
+					points += p;
+				}
+			}
+			// Go to the right
+			for(let i=x+1;i<15 && CWDATA.board[y][i] != "";i++) {
+				let letter = CWDATA.board[y][i];
+				let elt = document.getElementById(["s", y, "_", i].join(""));
+				let p = getLetterScore(letter, elt, modifiers);
+				if (typeof letter === "object") {
+					word = word + letter.joker;
+				} else {
+					word = word + letter;
+					points += p;
+				}
+			}
+			// score modifiers
+			modifiers.forEach(function(m) { if (m === "dw") { points *= 2; } else { points *= 3; } });
+			return { word: word, points: points };
+		}
+		function getVerticalWordFrom(x, y) {
+			let word = "";
+			let points = 0;
+			let modifiers = [];
+			// Go to the top
+			for(let i=y;i>=0 && CWDATA.board[i][x] != "";i--) {
+				let letter = CWDATA.board[i][x];
+				let elt = document.getElementById(["s", i, "_", x].join(""));
+				let p = getLetterScore(letter, elt, modifiers);
+				if (typeof letter === "object") {
+					word = letter.joker + word;
+				} else {
+					word = letter + word;
+					points += p;
+				}
+			}
+			// Go to the bottom
+			for(let i=y+1;i<15 && CWDATA.board[i][x] != "";i++) {
+				let letter = CWDATA.board[i][x];
+				let elt = document.getElementById(["s", i, "_", x].join(""));
+				let p = getLetterScore(letter, elt, modifiers);
+				if (typeof letter === "object") {
+					word = word + letter.joker;
+				} else {
+					word = word + letter;
+					points += p;
+				}
+			}
+			// score modifiers
+			modifiers.forEach(function(m) { if (m === "dw") { points *= 2; } else { points *= 3; } });
+			return { word: word, points: points };
+		}
+		let words = [];
+		words.push(getHorizontalWordFrom(placed[0].x, placed[0].y));
+		words.push(getVerticalWordFrom(placed[0].x, placed[0].y));
+		for (let i=1; i<placed.length;i++) {
+			if (placed[i].x === placed[0].x) { // going down
+				words.push(getHorizontalWordFrom(placed[i].x, placed[i].y));
+			} else { // going right
+				words.push(getVerticalWordFrom(placed[i].x, placed[i].y));
+			}
+		}
+		// we strip one letter words
+		for(let i=words.length-1;i>=0;i--) {
+			if (words[i].word.length < 2) {
+				words.splice(i, 1);
+			}
+		}
+		return words;
+	}
+
+	function updateUI() {
+		let validate = document.getElementById("validate");
+		if (isValidPlay()) {
+			let words = getNewWordsAndScores();
+			console.log(words);
+			let total = 0;
+			words.forEach(function(word) {
+				total += word.points;
+			});
+			validate.innerHTML = [total, " - Validate"].join("");
+			validate.disabled = false;
+		} else {
+			validate.innerHTML = "0 - Validate";
+			validate.disabled = true;
+		}
+	}
+
+	return {
+		init: function() {
+			// populate the board
+			for (let y=0; y<CWDATA.board.length; y++) {
+				const line = CWDATA.board[y];
+				for(let x=0; x<line.length; x++) {
+					let letter = line[x];
+					let elt = document.getElementById(["s", y, "_", x].join(""));
+					if (letter !== "") {
+						elt.className = "letter";
+						if (typeof letter === "object") {
+							elt.innerHTML = [letter.joker, "<div class=\"points\">&nbsp;</div>"].join("");
+							letter = "JOKER";
+						} else {
+							elt.innerHTML = [letter, "<div class=\"points\">", letters[letter].points, "</div>"].join("");
+						}
+						// we also remove the letter from the pool
+						letters[letter].count--;
+						total_remaining_letters--;
+					}
+					elt.onclick = makeBoardTileOnCLick(x, y);
+				}
+			}
+			// populate the rack
+			for (let x=0; x<7; x++) {
+				let letter = CWDATA.letters[x];
+				let elt = document.getElementById(["l", x].join(""));
+				if (letter !== undefined) {
+					elt.className = "letter";
+					// we remove the letter from the pool
+					letters[letter].count--;
+					total_remaining_letters--;
+					if (letter === "JOKER") {
+						elt.innerHTML = "&nbsp;";
+					} else {
+						elt.innerHTML = [letter, "<div class=\"points\">", letters[letter].points, "</div>"].join("");
+					}
+				}
+				elt.onclick = makeRackTileOnClick(x);
+			}
+			// populate remaining letters
+			let remaining_letters = [ "Lettres restantes: ", total_remaining_letters, "<br>" ];
+			let first = true;
+			for (const [key, value] of Object.entries(letters)) {
+				if (value.count > 0) {
+					if (first) {
+						remaining_letters = remaining_letters.concat(key, "x", value.count);
+						first = false;
+					} else {
+						remaining_letters = remaining_letters.concat(", ", key, "x", value.count);
+					}
+				}
+			}
+			document.getElementById("remaining_letters").innerHTML = remaining_letters.join("");
+		},
+	};
+}();
+
+CW.init();