From ca51ae66c40c0f040b81a5ed7b39602eb30c4ad2 Mon Sep 17 00:00:00 2001
From: Simon Parri <simonparri@ganzeria.com>
Date: Sun, 16 Feb 2025 23:29:02 -0600
Subject: Add version 0.1

---
 reviewer.html | 77 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 reviewer.html

(limited to 'reviewer.html')

diff --git a/reviewer.html b/reviewer.html
new file mode 100644
index 0000000..8f8be17
--- /dev/null
+++ b/reviewer.html
@@ -0,0 +1,77 @@
+<script>
+// from the Wikipedia article on SuperMemo
+function SM2(grade, {last_grade, last_review, repetitions, easiness, interval}) {
+  if (grade >= 3) {
+    if (repetitions == 0)
+      interval = 1
+    else if (repetitions == 1)
+      interval = 6
+    else
+      interval = Math.round(interval * easiness)
+    ++repetitions
+  } else {
+    repetitions = 0
+    interval = 1
+  }
+
+  easiness += 0.1 - (5 - grade) * (0.8 + (5 - grade) * 0.02)
+  if (easiness < 1.3)
+    easiness = 1.3
+
+  return {last_grade, last_review, repetitions, easiness, interval}
+}
+
+const initial_sm2 = () => ({repetitions: 0,
+			    easiness: 2.5,
+			    interval: 0})
+
+async function grade(card) {
+  let {sm2} = card,
+      grade = await ask(card, $settings.speed)
+  sm2 ||= initial_sm2()
+  return SM2(grade, {...sm2, last_grade: grade, last_review: Date.now()})
+}
+
+const needs_review_p = (card, time_factor=1) =>
+      (card.sm2 &&
+       (card.sm2.last_grade < 4 ||
+        (new Date().setHours(0, 0, 0, 0) - card.sm2.last_review) * time_factor >=
+        24 * 60 * 60 * 1000 * card.sm2.interval))
+
+const new_p = card => !card.sm2
+
+let $reviewing_s = false
+async function review$(deck, nc) {
+  if ($reviewing_s) return
+  $reviewing_s = true
+  async function r(news) {
+    let stack = deck
+        .filter(x => needs_review_p(x, $settings.time_factor))
+        .sort((a, b) => a.sm2.easiness - b.sm2.easiness)
+    if (news?.length) stack = news.concat(stack)
+    for (let card of stack) {
+      card.sm2 = await grade(card)
+      if ($settings.autosave)
+        await ṡ.set("deck", $deck)
+    }
+    if (deck.some(x => needs_review_p(x, $settings.time_factor)))
+      r()
+  }
+  let news = deck.filter(new_p)
+      .shuffle().slice(0, nc)
+  await r(news)
+  $reviewing_s = false
+}
+</script>
+
+<form name=grader onsubmit="review$($deck, this.nc.value); this.nc.value = 0; return false">
+<p>
+<label>Add <input type=number min=-1 name=nc> cards</label>
+<p>
+<input type=submit value=Start>
+</form>
+
+<script>
+$loaded_p.then(() =>
+  document.forms.grader.nc.value = $settings.default_new_cards)
+</script>
-- 
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