Add SRS

nicolator.js

@@ -187,16 +187,29 @@ let timerTimeout = null;
 let word = null;
 let repeats = 0;
 let failed = false;
+let problemWords = [];
+let problemTimes = [];
 const reset = () => {
+	failed = false;
 	input.value = "";
 	hint.innerHTML = "";
 	timer.value = 1;
 	if (repeats == 0) {
+		if (problemTimes.length > 0 && new Date() - problemTimes[0] > 60000) {
+			word = problemWords[0];
+			problemWords.shift();
+			problemTimes.shift();
+		} else {
 			word = words[Math.round(Math.random() * words.length)];
 		}
+	}
 	wordDisplay.innerHTML = word;
 	const typeTime = typeTimePerKana * word.length;
 	incorrectTimeout = setTimeout(() => {
+		if (!problemWords.includes(word)) {
+			problemWords.push(word);
+			problemTimes.push(new Date());
+		}
 		repeats += repeats == 0 ? 3 : 1;
 		failed = true;
 		wordDisplay.innerHTML = `${word} ❌`;