feat: filter exports by spread thresholds

src/content/market/spread-info.ts

@@ -1,4 +1,4 @@
-import type { SpreadInfoMetrics } from "./types";
+import type { SpreadInfoMetrics, SpreadMetricThresholds } from "./types";
 
 interface FetchResponseLike {
   json(): Promise<unknown>;
@@ -29,7 +29,7 @@ interface SpreadInfoMetricDefinition {
   label: string;
 }
 
-interface MappedSpreadInfoResponse {
+export interface MappedSpreadInfoResponse {
   averageCommentCount?: string;
   averageDuration?: string;
   averageLikeCount?: string;
@@ -108,6 +108,12 @@ export function createSpreadInfoClient(options: SpreadInfoClientOptions = {}) {
       }
 
       return metrics;
+    },
+    async loadAuthorSpreadMetricSnapshot(
+      authorId: string,
+      config: SpreadInfoConfig
+    ): Promise<MappedSpreadInfoResponse> {
+      return loadSpreadInfoFromUrl(buildSpreadInfoUrl(authorId, config, baseUrl));
     }
   };
 
@@ -201,6 +207,21 @@ export function mapSpreadInfoResponse(
   };
 }
 
+export function matchesSpreadThresholds(
+  metrics: MappedSpreadInfoResponse,
+  thresholds: SpreadMetricThresholds
+): boolean {
+  return Object.entries(thresholds).every(([key, threshold]) => {
+    if (typeof threshold !== "number" || !Number.isFinite(threshold)) {
+      return true;
+    }
+
+    const metricValue = metrics[key as keyof SpreadMetricThresholds];
+    const numericValue = readDisplayNumber(metricValue);
+    return numericValue !== null && numericValue >= threshold;
+  });
+}
+
 function buildSpreadInfoColumnHeader(
   config: SpreadInfoConfig,
   metric: SpreadInfoMetricDefinition
@@ -278,6 +299,15 @@ function readNumberLike(value: unknown): number | null {
   return null;
 }
 
+function readDisplayNumber(value: string | undefined): number | null {
+  if (!hasTextValue(value)) {
+    return null;
+  }
+
+  const parsedValue = Number(value.replace(/[% ,]/g, ""));
+  return Number.isFinite(parsedValue) ? parsedValue : null;
+}
+
 function formatBasisPointPercent(value: number | null): string | undefined {
   if (value === null) {
     return undefined;