X-Git-Url: http://git.shiar.nl/sheet.git/blobdiff_plain/e889c7543227d2aeee90553fea9c59524c2cec95..f88a74c510e90c9c864d37bfaaf23fefa1a0fbdc:/word/quiz.js

diff --git a/word/quiz.js b/word/quiz.js
index ef5e0d8..e2e8cb6 100644
--- a/word/quiz.js
+++ b/word/quiz.js
@@ -1,35 +1,56 @@
-class Quiz {
-	next() {
-		let word = this.words.shift();
-		let form = put(this.form,
-			'+img[src=$]+ul', `/data/word/en/${word[0]}.jpg`,
-		);
+Array.prototype.shuffle = function () {
+	for (let i = this.length - 1; i > 0; i--) {
+		const j = Math.floor(Math.random() * (i + 1)); // random index 0..i
+		[this[i], this[j]] = [this[j], this[i]]; // swap elements
+	}
+	return this;
+};
 
-		let answers = [word[2], this.words[1][2], this.words[2][2], this.words[3][2]]
-			.sort(() => {return .5 - Math.random()}) // shuffle
-		answers.forEach(suggest => {
-			let option = put(form, 'li', suggest, {onclick: () => {
-				if (suggest != word[2]) {
-					// incorrect
-					put(option, '.wrong');
-					return;
-				}
-				put(option, '.good');
-				window.setTimeout(() => this.next(), 500);
-			}});
-		});
+class WordQuiz {
+	dataselect(json) {
+		// find viable rows from json data
+		let rows = Object.values(json);
+		if (this.preset.cat !== undefined) {
+			let cats = {}; // category lookup
+			for (let i in json) {
+				let cat = json[i][3];
+				if (!cats[cat]) cats[cat] = [];
+				cats[cat].push(i)
+			}
+
+			rows = [];
+			let children = cats[this.preset.cat];
+			for (let loop = 0; children.length && loop < 20; loop++) {
+				rows.push(...children);
+				children = children.map(cat => cats[cat]).filter(is => is).flat();
+			}
+			rows = rows.map(row => json[row]).filter(row => row[2]);
+		}
+		if (this.preset.level !== undefined) {
+			rows = rows.filter(row => row[1] <= this.preset.level);
+		}
+
+		{
+			let cats = new Set();
+			let subcats = rows.map(row => row[3]); // direct parents
+			for (let loop = 0; subcats.length && loop < 20; loop++) {
+				subcats.forEach(cat => cats.add(cat));
+				subcats = subcats.map(row => json[row] && json[row][3]).filter(val => val); // recurse grandparents
+			}
+			rows = rows.filter(row => !cats.has(row[2])); // remove referenced categories
+		}
+		return rows.shuffle();
 	}
 
-	constructor() {
-		this.dataurl = '/data/wordlist.nl.json';
-		fetch(this.dataurl).then(res => res.json()).then(json => {
-			this.form = document.getElementById('quiz');
-			this.words = Object.values(json)
-				.sort(() => {return .5 - Math.random()}) // shuffle
-				.map(row => row.split(/:/))
-			this.next();
+	load(dataurl) {
+		this.preset = {};
+		fetch(dataurl).then(res => res.json()).then(json => {
+			this.words = this.dataselect(json)
+			this.setup();
 		});
 	}
-};
 
-new Quiz();
+	constructor(dataurl) {
+		this.load(dataurl);
+	}
+}