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// ─── Google Gemini Usage Tracking ───────────────────────────
// Two modes:
// 1. API key → queries native Gemini models endpoint for rate limits
// 2. Cookie → scrapes gemini.google.com for current usage % (like OpenCode)
//
// Set GEMINI_COOKIE env var with the value of your __Secure-1PSID cookie
// from gemini.google.com to see current usage percentages.
export interface GoogleUsageBucket {
percentUsed: number; // 0-100
resetsAt?: string; // e.g. "22:40" or "30 May at 17:40"
}
export interface GoogleUsageReport {
// Mode 1: API key rate limits
models?: Array<{
name: string;
inputTokenLimit: number;
outputTokenLimit: number;
rpm: number;
requestsPerDay: number;
}>;
// Mode 2: Cookie-scraped usage from gemini.google.com
currentUsage?: GoogleUsageBucket;
weeklyUsage?: GoogleUsageBucket;
}
// Helpers to extract HTML text between markers
function extractBetween(html: string, after: string, before: string): string | null {
const start = html.indexOf(after);
if (start === -1) return null;
const s = start + after.length;
const end = html.indexOf(before, s);
if (end === -1) return null;
return html.slice(s, end).trim();
}
function extractPercent(html: string, afterMarker: string): number | null {
const chunk = extractBetween(html, afterMarker, "%");
if (!chunk) return null;
const digits = chunk.replace(/\D/g, "");
const n = parseInt(digits, 10);
return Number.isNaN(n) ? null : n;
}
function extractResetTime(html: string, afterMarker: string): string | null {
// Look for "Resets at HH:MM" or "Resets on DD Mon at HH:MM"
const start = html.indexOf(afterMarker);
if (start === -1) return null;
const chunk = html.slice(start + afterMarker.length);
// Match time patterns
const m = chunk.match(/Resets?\s+(at|on)\s+([^<]+)/i);
if (!m?.[1] || !m[2]) return null;
return `${m[1]} ${m[2].trim()}`;
}
async function scrapeGeminiWeb(cookie: string): Promise<{
currentUsage?: GoogleUsageBucket;
weeklyUsage?: GoogleUsageBucket;
} | null> {
try {
const response = await fetch("https://gemini.google.com/app", {
headers: {
cookie: `__Secure-1PSID=${cookie}`,
"accept-language": "en-US,en;q=0.9",
},
redirect: "follow",
});
if (!response.ok) return null;
const html = await response.text();
// Detect auth redirect
if (html.includes("ServiceLogin") || html.includes("sign in")) {
return null;
}
// Look for usage data in the page
// Pattern: "Current usage" followed by a percentage and reset time
const currentPct = extractPercent(html, "Current usage");
const currentReset = extractResetTime(html, "Current usage");
// Weekly limit section
const weeklyPct = extractPercent(html, "Weekly limit");
const weeklyReset = extractResetTime(html, "Weekly limit");
const result: {
currentUsage?: GoogleUsageBucket;
weeklyUsage?: GoogleUsageBucket;
} = {};
if (currentPct !== null) {
result.currentUsage = {
percentUsed: currentPct,
resetsAt: currentReset ?? undefined,
};
}
if (weeklyPct !== null) {
result.weeklyUsage = {
percentUsed: weeklyPct,
resetsAt: weeklyReset ?? undefined,
};
}
if (result.currentUsage || result.weeklyUsage) return result;
return null;
} catch {
return null;
}
}
async function fetchModelsViaApiKey(apiKey: string): Promise<Array<{
name: string;
inputTokenLimit: number;
outputTokenLimit: number;
rpm: number;
requestsPerDay: number;
}> | null> {
const url = `https://generativelanguage.googleapis.com/v1beta/models?key=${encodeURIComponent(apiKey)}`;
try {
const response = await fetch(url);
if (!response.ok) return null;
const data = (await response.json()) as {
models?: Array<{
name: string;
inputTokenLimit?: number;
outputTokenLimit?: number;
rateLimit?: { requestsPerMinute?: number };
limits?: { requestsPerDay?: number };
}>;
};
return (data.models ?? [])
.filter((m) => {
const name = m.name?.replace(/^models\//, "") ?? "";
return name.startsWith("gemini-");
})
.map((m) => ({
name: m.name?.replace(/^models\//, "") ?? "",
inputTokenLimit: m.inputTokenLimit ?? 0,
outputTokenLimit: m.outputTokenLimit ?? 0,
rpm: m.rateLimit?.requestsPerMinute ?? 0,
requestsPerDay: m.limits?.requestsPerDay ?? 0,
}));
} catch {
return null;
}
}
export async function fetchGoogleUsage(
apiKey: string,
_baseUrl: string,
): Promise<GoogleUsageReport | null> {
const results: GoogleUsageReport = {};
// Try API key mode: get model rate limits
const models = await fetchModelsViaApiKey(apiKey);
if (models) {
results.models = models;
}
// Try cookie mode: scrape gemini.google.com usage
const cookie = process.env.GEMINI_COOKIE;
if (cookie) {
const scraped = await scrapeGeminiWeb(cookie);
if (scraped) {
if (scraped.currentUsage) results.currentUsage = scraped.currentUsage;
if (scraped.weeklyUsage) results.weeklyUsage = scraped.weeklyUsage;
}
}
if (results.models || results.currentUsage || results.weeklyUsage) return results;
return null;
}
|
