fix: auto promotion not working as expecting

src/RankTracker.test.ts

@@ -132,11 +132,25 @@ Deno.test("RankTracker autotrack after promotion", async () => {
     },
   }]);
 
+  const gameId1 = await gameId(genId(1));
   assertEquals(finalState, {
-    gameId: await gameId(genId(1)),
+    gameId: gameId1,
     rank: "A-",
     rankPoint: 200,
   });
+
+  assertEquals(await tracker.getRankStateById(genId(1)), {
+    before: {
+      gameId: await gameId(genId(0)),
+      rank: "B+",
+      rankPoint: -1,
+    },
+    after: {
+      gameId: gameId1,
+      rank: "A-",
+      rankPoint: 200,
+    },
+  });
 });
 
 Deno.test("RankTracker tracks promotion, ignoring INPROGRESS", async () => {

src/RankTracker.ts

@@ -331,6 +331,7 @@ export class RankTracker {
       return;
     }
 
+    this.state = curState;
     const deltaList = generateDeltaList(curState, flatten);
 
     if (!deltaList) {

src/exporters/stat.ink.ts

@@ -492,6 +492,16 @@ export class StatInkExporter implements GameExporter {
         result.rank_exp_change === undefined
       ) {
         result.rank_exp_change = result.rank_after_exp - result.rank_before_exp;
+      } else if (
+        bankaraMatchChallenge?.isUdemaeUp &&
+        bankaraMatchChallenge.earnedUdemaePoint
+      ) {
+        // If the before state is generated by auto promotion, the rank_before_exp is wrong.
+        // And `earnedUdemaePoint` from splatnet3 is -xxx.
+        // So we calcuate `rank_before_exp` and remove `rank_exp_change` here
+        result.rank_before_exp = result.rank_after_exp -
+          bankaraMatchChallenge.earnedUdemaePoint;
+        result.rank_exp_change = undefined;
       }
 
       if (!result.rank_after) {