feat: stream goals

src/hooks/goals.ts

@@ -0,0 +1,43 @@
+import { useMemo } from "react";
+import {
+  RequestBuilder,
+  FlatNoteStore,
+  NostrEvent,
+  EventKind,
+  NostrLink,
+} from "@snort/system";
+import { useRequestBuilder } from "@snort/system-react";
+import { GOAL } from "const";
+import { System } from "index";
+import { findTag } from "utils";
+
+export function useGoal(link: NostrLink, leaveOpen = true) {
+  const sub = useMemo(() => {
+    const b = new RequestBuilder(`goals:${link.author!.slice(0, 12)}`);
+    b.withOptions({ leaveOpen });
+    b.withFilter()
+      .kinds([GOAL])
+      .tag("a", [`${link.kind}:${link.author!}:${link.id}`]);
+    return b;
+  }, [link]);
+
+  const { data } = useRequestBuilder<FlatNoteStore>(System, FlatNoteStore, sub);
+
+  return data?.at(0);
+}
+
+export function useGoalZaps(goal: NostrEvent) {
+  const a = findTag(goal, "a") ?? "";
+  const sub = useMemo(() => {
+    const b = new RequestBuilder(`goal-zaps:${goal.id.slice(0, 12)}`);
+    b.withFilter()
+      .kinds([EventKind.ZapReceipt])
+      .tag("e", [goal.id])
+      .tag("p", [goal.pubkey]); // todo: ability to tag one or more p in goals?
+    return b;
+  }, [goal]);
+
+  const { data } = useRequestBuilder<FlatNoteStore>(System, FlatNoteStore, sub);
+
+  return data ?? [];
+}