refactor(discord-bot): improve project structure

apps/discord-bot/src/services/tracking.ts

@@ -0,0 +1,74 @@
+import { getPlayer } from "~/services/wov";
+import { readFile, writeFile, access } from "node:fs/promises";
+import { constants } from "node:fs";
+import type { TrackedPlayers } from "~/types";
+
+const TRACKED_PLAYER_FILE = "./.cache/tracked.json";
+
+export async function initTracking(): Promise<void> {
+  try {
+    await access(TRACKED_PLAYER_FILE, constants.F_OK);
+  } catch {
+    await writeFile(TRACKED_PLAYER_FILE, "{}");
+  }
+}
+
+export async function listTrackedPlayers(): Promise<string[]> {
+  const content = await readFile(TRACKED_PLAYER_FILE, "utf-8");
+  const trackedPlayers: TrackedPlayers = JSON.parse(content);
+
+  return Object.keys(trackedPlayers);
+}
+
+export async function untrackWovPlayer(
+  playerId: string,
+): Promise<{ event: "notTracked" } | { event: "trackerRemoved" }> {
+  const content = await readFile(TRACKED_PLAYER_FILE, "utf-8");
+  const trackedPlayers: TrackedPlayers = JSON.parse(content);
+
+  if (!trackedPlayers[playerId]) return { event: "notTracked" };
+
+  delete trackedPlayers[playerId];
+  await writeFile(TRACKED_PLAYER_FILE, JSON.stringify(trackedPlayers));
+
+  return { event: "trackerRemoved" };
+}
+
+export async function trackWovPlayer(playerId: string): Promise<
+  | { event: "notFound" }
+  | {
+      event: "registered";
+    }
+  | { event: "changed"; oldUsernames: string[]; newUsername: string }
+  | { event: "none" }
+> {
+  const content = await readFile(TRACKED_PLAYER_FILE, "utf-8");
+  const trackedPlayers: TrackedPlayers = JSON.parse(content);
+
+  const player = await getPlayer(playerId);
+  if (!player) return { event: "notFound" };
+
+  const currentUsernames = trackedPlayers[playerId];
+  if (currentUsernames) {
+    const oldUsernames = [...currentUsernames];
+    if (!currentUsernames.includes(player.username)) {
+      currentUsernames.push(player.username);
+
+      await writeFile(TRACKED_PLAYER_FILE, JSON.stringify(trackedPlayers));
+
+      return {
+        event: "changed",
+        oldUsernames,
+        newUsername: player.username,
+      };
+    } else {
+      return {
+        event: "none",
+      };
+    }
+  } else {
+    trackedPlayers[playerId] = [player.username];
+    await writeFile(TRACKED_PLAYER_FILE, JSON.stringify(trackedPlayers));
+    return { event: "registered" };
+  }
+}