refactor(infra): split provider usage

src/infra/provider-usage.fetch.codex.ts

@@ -0,0 +1,102 @@
+import { fetchJson } from "./provider-usage.fetch.shared.js";
+import { clampPercent, PROVIDER_LABELS } from "./provider-usage.shared.js";
+import type {
+  ProviderUsageSnapshot,
+  UsageWindow,
+} from "./provider-usage.types.js";
+
+type CodexUsageResponse = {
+  rate_limit?: {
+    primary_window?: {
+      limit_window_seconds?: number;
+      used_percent?: number;
+      reset_at?: number;
+    };
+    secondary_window?: {
+      limit_window_seconds?: number;
+      used_percent?: number;
+      reset_at?: number;
+    };
+  };
+  plan_type?: string;
+  credits?: { balance?: number | string | null };
+};
+
+export async function fetchCodexUsage(
+  token: string,
+  accountId: string | undefined,
+  timeoutMs: number,
+  fetchFn: typeof fetch,
+): Promise<ProviderUsageSnapshot> {
+  const headers: Record<string, string> = {
+    Authorization: `Bearer ${token}`,
+    "User-Agent": "CodexBar",
+    Accept: "application/json",
+  };
+  if (accountId) headers["ChatGPT-Account-Id"] = accountId;
+
+  const res = await fetchJson(
+    "https://chatgpt.com/backend-api/wham/usage",
+    { method: "GET", headers },
+    timeoutMs,
+    fetchFn,
+  );
+
+  if (res.status === 401 || res.status === 403) {
+    return {
+      provider: "openai-codex",
+      displayName: PROVIDER_LABELS["openai-codex"],
+      windows: [],
+      error: "Token expired",
+    };
+  }
+
+  if (!res.ok) {
+    return {
+      provider: "openai-codex",
+      displayName: PROVIDER_LABELS["openai-codex"],
+      windows: [],
+      error: `HTTP ${res.status}`,
+    };
+  }
+
+  const data = (await res.json()) as CodexUsageResponse;
+  const windows: UsageWindow[] = [];
+
+  if (data.rate_limit?.primary_window) {
+    const pw = data.rate_limit.primary_window;
+    const windowHours = Math.round((pw.limit_window_seconds || 10800) / 3600);
+    windows.push({
+      label: `${windowHours}h`,
+      usedPercent: clampPercent(pw.used_percent || 0),
+      resetAt: pw.reset_at ? pw.reset_at * 1000 : undefined,
+    });
+  }
+
+  if (data.rate_limit?.secondary_window) {
+    const sw = data.rate_limit.secondary_window;
+    const windowHours = Math.round((sw.limit_window_seconds || 86400) / 3600);
+    const label = windowHours >= 24 ? "Day" : `${windowHours}h`;
+    windows.push({
+      label,
+      usedPercent: clampPercent(sw.used_percent || 0),
+      resetAt: sw.reset_at ? sw.reset_at * 1000 : undefined,
+    });
+  }
+
+  let plan = data.plan_type;
+  if (data.credits?.balance !== undefined && data.credits.balance !== null) {
+    const balance =
+      typeof data.credits.balance === "number"
+        ? data.credits.balance
+        : parseFloat(data.credits.balance) || 0;
+    plan = plan ? `${plan} ($${balance.toFixed(2)})` : `$${balance.toFixed(2)}`;
+  }
+
+  return {
+    provider: "openai-codex",
+    displayName: PROVIDER_LABELS["openai-codex"],
+    windows,
+    plan,
+  };
+}