prototype subdeck from Kanji

scripts/get-kanji-level.ts

@@ -63,23 +63,39 @@ async function makeWaniKaniKanjiLevels(opts: { cache?: boolean } = {}) {
 
 export async function makeKanjiLevels() {
   const wk = await makeWaniKaniKanjiLevels({ cache: true });
-  const wkKanji = new Set(
-    Object.values(wk).flatMap((v) => Object.values(v).flat()),
-  );
-
   const beyond = yaml.load(
     readFileSync('assets/beyond.yaml', 'utf-8'),
   ) as ILevelMap;
 
-  for (const [cat, map] of Object.entries(beyond)) {
-    const catMap = wk[cat] || {};
-    Object.entries(map).map(([levelString, ks]) => {
-      catMap[levelString] = ks.filter((k) => !wkKanji.has(k));
-    });
-    wk[cat] = catMap;
-  }
+  const kanjiToLevel = new Map<
+    string,
+    {
+      level: number;
+      deckName: string;
+    }
+  >();
 
-  return wk;
+  const setKanjiToLevel = (lvMap: ILevelMap) => {
+    Object.entries(lvMap).map(([cat, map]) => {
+      Object.entries(map).map(([levelString, ks]) => {
+        const level = Number(levelString);
+        ks.map((k) => {
+          let prev = kanjiToLevel.get(k);
+          if (!prev || prev.level > level) {
+            prev = {
+              level,
+              deckName: cat + '::' + levelString,
+            };
+            kanjiToLevel.set(k, prev);
+          }
+        });
+      });
+    });
+  };
+  setKanjiToLevel(wk);
+  setKanjiToLevel(beyond);
+
+  return kanjiToLevel;
 }
 
 export async function repairBeyond() {