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98c9143 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 | import consola from "consola"
const copilotRateLimitTypes = ["session", "weekly"] as const
export type CopilotRateLimitType = (typeof copilotRateLimitTypes)[number]
type HeadersMap = Record<string, string | undefined>
type HeadersLike = Headers | HeadersMap
type QuotaSnapshotMap = Record<string, unknown>
export interface CopilotRateLimitUsage {
type: CopilotRateLimitType
remaining: string
resetAt: string
}
export interface CopilotQuotaSnapshot {
entitlement: string
percent_remaining: number
overage_permitted: boolean
overage_count: number
reset_date: string
}
const copilotRateLimitHeaders: Record<CopilotRateLimitType, string> = {
session: "x-usage-ratelimit-session",
weekly: "x-usage-ratelimit-weekly",
}
const copilotQuotaSnapshotKeys: Record<CopilotRateLimitType, string> = {
session: "5Hour-Session-RateLimits",
weekly: "Weekly-Session-RateLimits",
}
const hasGetMethod = (headers: HeadersLike): headers is Headers => {
return "get" in headers && typeof headers.get === "function"
}
const getHeaderValue = (
headers: HeadersLike,
headerName: string,
): string | null => {
if (hasGetMethod(headers)) {
return headers.get(headerName)
}
const normalizedHeaderName = headerName.toLowerCase()
const matchedEntry = Object.entries(headers).find(
([key]) => key.toLowerCase() === normalizedHeaderName,
)
return matchedEntry?.[1] ?? null
}
export const parseCopilotRateLimitHeader = (
headerValue: string,
): Omit<CopilotRateLimitUsage, "type"> | null => {
const params = new URLSearchParams(headerValue)
const remaining = params.get("rem")
const resetAt = params.get("rst")
if (!remaining || !resetAt) {
return null
}
return {
remaining,
resetAt,
}
}
export const getCopilotRateLimitUsage = (
headers: HeadersLike,
type: CopilotRateLimitType,
): CopilotRateLimitUsage | null => {
const headerName = copilotRateLimitHeaders[type]
const headerValue = getHeaderValue(headers, headerName)
if (!headerValue) {
return null
}
const parsed = parseCopilotRateLimitHeader(headerValue)
if (!parsed) {
return null
}
return {
type,
...parsed,
}
}
export const getCopilotRateLimitUsageFromSnapshots = (
snapshots: QuotaSnapshotMap | undefined,
type: CopilotRateLimitType,
): CopilotRateLimitUsage | null => {
const snapshot = snapshots?.[copilotQuotaSnapshotKeys[type]]
if (!isCopilotQuotaSnapshot(snapshot)) {
return null
}
return {
remaining: String(snapshot.percent_remaining),
resetAt: snapshot.reset_date,
type,
}
}
export const logCopilotRateLimits = (headers: HeadersLike): void => {
for (const type of copilotRateLimitTypes) {
const usage = getCopilotRateLimitUsage(headers, type)
if (!usage) {
continue
}
logCopilotRateLimitUsage(usage)
}
}
export const logCopilotQuotaSnapshots = (
snapshots: QuotaSnapshotMap | undefined,
): void => {
for (const type of copilotRateLimitTypes) {
const usage = getCopilotRateLimitUsageFromSnapshots(snapshots, type)
if (!usage) {
continue
}
logCopilotRateLimitUsage(usage)
}
}
const logCopilotRateLimitUsage = (usage: CopilotRateLimitUsage): void => {
const d = new Date(usage.resetAt)
const dateStr = Number.isNaN(d.getTime()) ? usage.resetAt : d.toLocaleString()
consola.info(
`Copilot ${usage.type} quota remaining: ${usage.remaining}, resets at: ${dateStr}`,
)
}
const isCopilotQuotaSnapshot = (
value: unknown,
): value is CopilotQuotaSnapshot => {
if (!value || typeof value !== "object") {
return false
}
const record = value as Record<string, unknown>
return (
typeof record.entitlement === "string"
&& typeof record.percent_remaining === "number"
&& typeof record.overage_permitted === "boolean"
&& typeof record.overage_count === "number"
&& typeof record.reset_date === "string"
)
}
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