return this;
};
+Set.prototype.filter = function (f) {
+ return new Set([...this].filter(f));
+};
+
class WordQuiz {
dataselect(json) {
+ this.data = this.datafilter(json);
+ let rows = Object.values(this.data);
+ rows = rows.filter(row => !row[3].length); // remove referenced categories
+ return rows.shuffle();
+ }
+
+ datafilter(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)
- }
+ let ids = new Set(Object.keys(json));
+ const selection = {...json}; // clone
+
+ for (let cat of selection[''][3]) {
+ if (selection[cat])
+ selection[cat][1] = 0; // keep root categories
+ }
- rows = [];
- let children = cats[this.preset.cat];
+ if (this.preset.cat !== undefined) {
+ ids.clear();
+ let children = 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();
+ for (let child of children) ids.add(child.toString());
+ children = children.map(cat => json[cat][3]).filter(is => is).flat()
}
- rows = rows.map(row => json[row]).filter(row => row[2]);
+ }
+ if (this.preset.images) {
+ ids = ids.filter(id => json[id][2]);
}
if (this.preset.level !== undefined) {
- rows = rows.filter(row => row[1] <= this.preset.level);
+ ids = ids.filter(id => json[id][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
+ // keep only wanted ids
+ for (let id in selection) {
+ if (id && !ids.has(id)) {
+ delete selection[id];
}
- rows = rows.filter(row => !cats.has(row[2])); // remove referenced categories
}
- return rows.shuffle();
- }
- load(dataurl) {
- this.preset = {};
- let input;
- if (input = window.location.hash.match(/\d+/)) {
- this.preset.cat = input[0];
+ // retain orphaned references in grandparent categories
+ for (let id in selection) {
+ selection[id][3] = function subresolve(subs) {
+ //console.log(subs);
+ return (subs || []).flatMap(sub =>
+ sub in selection ? [sub] : json[sub] ? subresolve(json[sub][3]) : []
+ );
+ }(selection[id][3]);
}
- if (window.location.hash.match(/a/)) {
- this.preset.level = 3;
+ return selection;
+ }
+
+ configure(params = window.location.hash.split('#')) {
+ const opts = new Map(params.map(arg => arg.split(/[:=](.*)/)));
+ for (let [query, val] of opts) {
+ if (query.match(/^\d+$/)) {
+ this.preset.cat = [parseInt(query)];
+ }
+ else if (query === 'level') {
+ this.preset.level = parseInt(val);
+ }
+ else {
+ this.preset[query] = val;
+ }
}
+ this.preset.dataurl = `/data/wordlist.${this.preset.lang}.json`
+ }
- fetch(dataurl).then(res => res.json()).then(json => {
+ setup() {
+ this.form = document.getElementById('quiz');
+ }
+
+ load() {
+ this.configure();
+ fetch(this.preset.dataurl).then(res => res.json()).then(json => {
this.words = this.dataselect(json)
this.setup();
});
fetch('/word/report', {method: 'POST', body: JSON.stringify(this.history)});
}
- constructor(dataurl) {
- this.load(dataurl);
+ constructor() {
+ this.preset = {images: true, lang: 'en'};
+ this.load();
this.history = [];
window.onbeforeunload = e => {
this.stop('abort');
};
+ window.onhashchange = e => {
+ this.load();
+ };
}
}