Function buildHomeUsageViewModel

src/features/home/homeUsageViewModel.ts:33–293

({
  accountInfo,
  accountRateLimits,
  localUsageSnapshot,
  usageMetric,
  usageShowRemaining,
}: {
  accountInfo: AccountSnapshot | null;
  accountRateLimits: RateLimitSnapshot | null;
  localUsageSnapshot: LocalUsageSnapshot | null;
  usageMetric: UsageMetric;
  usageShowRemaining: boolean;
})

};

export function buildHomeUsageViewModel({
  accountInfo,
  accountRateLimits,
  localUsageSnapshot,
  usageMetric,
  usageShowRemaining,
}: {
  accountInfo: AccountSnapshot | null;
  accountRateLimits: RateLimitSnapshot | null;
  localUsageSnapshot: LocalUsageSnapshot | null;
  usageMetric: UsageMetric;
  usageShowRemaining: boolean;
}): HomeUsageViewModel {
  const usageTotals = localUsageSnapshot?.totals ?? null;
  const usageDays = localUsageSnapshot?.days ?? [];
  const latestUsageDay = usageDays[usageDays.length - 1] ?? null;
  const last7Days = usageDays.slice(-7);
  const last7Tokens = last7Days.reduce((total, day) => total + day.totalTokens, 0);
  const last7Input = last7Days.reduce((total, day) => total + day.inputTokens, 0);
  const last7Cached = last7Days.reduce(
    (total, day) => total + day.cachedInputTokens,
    0,
  );
  const last7AgentMs = last7Days.reduce(
    (total, day) => total + (day.agentTimeMs ?? 0),
    0,
  );
  const last30AgentMs = usageDays.reduce(
    (total, day) => total + (day.agentTimeMs ?? 0),
    0,
  );
  const averageDailyAgentMs =
    last7Days.length > 0 ? Math.round(last7AgentMs / last7Days.length) : 0;
  const last7AgentRuns = last7Days.reduce(
    (total, day) => total + (day.agentRuns ?? 0),
    0,
  );
  const last30AgentRuns = usageDays.reduce(
    (total, day) => total + (day.agentRuns ?? 0),
    0,
  );
  const averageTokensPerRun =
    last7AgentRuns > 0 ? Math.round(last7Tokens / last7AgentRuns) : null;
  const averageRunDurationMs =
    last7AgentRuns > 0 ? Math.round(last7AgentMs / last7AgentRuns) : null;
  const last7ActiveDays = last7Days.filter(isUsageDayActive).length;
  const last30ActiveDays = usageDays.filter(isUsageDayActive).length;
  const averageActiveDayAgentMs =
    last7ActiveDays > 0 ? Math.round(last7AgentMs / last7ActiveDays) : null;
  const peakAgentDay = usageDays.reduce<
    | { day: string; agentTimeMs: number }
    | null
  >((best, day) => {
    const value = day.agentTimeMs ?? 0;
    if (value <= 0) {
      return best;
    }
    if (!best || value > best.agentTimeMs) {