feat: add market result store

src/content/market/result-store.ts

@@ -0,0 +1,63 @@
+import type {
+  MarketApiFailureReason,
+  MarketRecord,
+  MarketRowSnapshot
+} from "./types";
+import type { AfterSearchRates } from "./types";
+
+export function createMarketResultStore() {
+  const records = new Map<string, MarketRecord>();
+
+  return {
+    getRecord(authorId: string) {
+      return records.get(authorId) ?? null;
+    },
+    listRecords() {
+      return Array.from(records.values());
+    },
+    setAuthorFailed(authorId: string, reason: MarketApiFailureReason) {
+      const existingRecord = ensureRecord(authorId);
+      existingRecord.status = "failed";
+      existingRecord.failureReason = reason;
+    },
+    setAuthorLoading(authorId: string) {
+      const existingRecord = ensureRecord(authorId);
+      existingRecord.status = "loading";
+      delete existingRecord.failureReason;
+    },
+    setAuthorSuccess(authorId: string, rates: Required<AfterSearchRates>) {
+      const existingRecord = ensureRecord(authorId);
+      existingRecord.status = "success";
+      existingRecord.rates = rates;
+      delete existingRecord.failureReason;
+    },
+    upsertMarketRow(row: MarketRowSnapshot) {
+      const existingRecord = records.get(row.authorId);
+      if (existingRecord) {
+        return existingRecord;
+      }
+
+      const nextRecord: MarketRecord = {
+        ...row,
+        status: "idle"
+      };
+      records.set(row.authorId, nextRecord);
+      return nextRecord;
+    }
+  };
+
+  function ensureRecord(authorId: string): MarketRecord {
+    const existingRecord = records.get(authorId);
+    if (existingRecord) {
+      return existingRecord;
+    }
+
+    const nextRecord: MarketRecord = {
+      authorId,
+      authorName: authorId,
+      status: "idle"
+    };
+    records.set(authorId, nextRecord);
+    return nextRecord;
+  }
+}