refactor: modularize into core/events/formatters/drivers

src/formatters/member.ts

@@ -0,0 +1,34 @@
+import type { NeutralMessage, NeutralAuthor } from "../types";
+import { GITHUB_COLORS } from "./colors";
+import { emojiPrefix, type T, buildMessage } from "./helpers";
+
+export function formatMember(
+  payload: Record<string, unknown>,
+  repo: string | undefined,
+  author: NeutralAuthor,
+  t: T,
+  showEmoji: boolean,
+): NeutralMessage {
+  const action = (payload.action as string) ?? "added";
+  const member = payload.member as { login?: string } | undefined;
+
+  const al = t("actions." + action) ?? action;
+  const emoji = action === "added" ? "➕" : action === "removed" ? "➖" : "👤";
+  const em = (e: string): string => emojiPrefix(e, showEmoji);
+  const memberName = member?.login ?? t("common.unknown");
+
+  return buildMessage(
+    {
+      author,
+      title: t("events.member.title", {
+        repo: repo ?? t("common.repository"),
+        emoji: em(emoji),
+        action: al,
+        name: memberName,
+      }),
+      color: action === "added" ? GITHUB_COLORS.member_added : GITHUB_COLORS.member_removed,
+    },
+    t,
+    repo,
+  );
+}