word/quiz: preset configuration filters level

[sheet.git] / word / quiz.js

diff --git a/word/quiz.js b/word/quiz.js
index 0518fa14bdbc72c386f1b5abe4554c1f05d30965..146aff73e61171c10f81779aad8be30777d7da35 100644 (file)
--- a/word/quiz.js
+++ b/word/quiz.js
@@ -1,33 +1,30 @@
-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 label = suggest.replace(/\/.*/, '');
-                       let option = put(form, 'li', label, {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.level !== undefined) {
+                       rows = rows.filter(row => row[1] <= this.preset.level);
+               }
+               return rows.shuffle();
        }
 
-       constructor(dataurl) {
+       load(dataurl) {
+               this.preset = {};
                fetch(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();
+                       this.words = this.dataselect(json)
+                       this.setup();
                });
        }
-};
+
+       constructor(dataurl) {
+               this.load(dataurl);
+       }
+}