From a8e02f8948b961a27b47965e0eab1fcc1c207915 Mon Sep 17 00:00:00 2001
From: Mischa POSLAWSKY <perl@shiar.org>
Date: Thu, 30 Dec 2021 01:40:43 +0100
Subject: [PATCH] word/quiz: preset configuration filters level

Manual option preset.cat to test difficulty selection.
---
 word/quiz.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/word/quiz.js b/word/quiz.js
index 361d075..146aff7 100644
--- a/word/quiz.js
+++ b/word/quiz.js
@@ -8,11 +8,16 @@ Array.prototype.shuffle = function () {
 
 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();
 	}
 
 	load(dataurl) {
+		this.preset = {};
 		fetch(dataurl).then(res => res.json()).then(json => {
 			this.words = this.dataselect(json)
 			this.setup();
-- 
2.30.0