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import { createOptionalUrl, nodeEnv } from "./shared"
const requiredText = z.string().trim().min(1)
const userId = z.string().regex(/^[1-9]\d*$/)
const privatePath = requiredText.refine(
(value) => value.startsWith("/") || /^[a-z]:[\\/]/i.test(value),
"An absolute private path is required."
)
export const twitchEventSubSecret = z.string().regex(/^[\x21-\x7e]{10,100}$/)
const credentials = z.object({
NODE_ENV: nodeEnv,
TWITCH_CLIENT_ID: requiredText,
TWITCH_CLIENT_SECRET: requiredText,
TWITCH_BOT_USER_ID: userId,
TWITCH_BOT_GRANT_PATH: privatePath,
TWITCH_HTTP_TIMEOUT_MS: z.coerce
.number()
.int()
.min(1000)
.max(30000)
.default(10000),
})
export type TwitchCredentials = z.infer<typeof credentials>
export function resolveTwitchCredentials(
env: Record<string, string | undefined> = process.env
): TwitchCredentials {
return parseEnvironment(credentials, env)
}
export function resolveTwitchRuntimeEnv(
env: Record<string, string | undefined> = process.env
) {
const schema = credentials
.extend({
TWITCH_BOOTSTRAP_BROADCASTER_USER_ID: userId.optional(),
TWITCH_EVENTSUB_CALLBACK_URL: createOptionalUrl({
nodeEnv: () => env.NODE_ENV,
}).pipe(
z.string().refine((value) => {
const url = new URL(value)
return (
url.protocol === "https:" &&
(!url.port || url.port === "443") &&
!url.username &&
!url.password &&
!url.search &&
!url.hash &&
url.pathname === "/eventsub"
)
}, "A public HTTPS /eventsub callback on port 443 is required.")
),
TWITCH_EVENTSUB_SECRET: twitchEventSubSecret,
TWITCH_WORKER_SECRET: requiredText,
CONVEX_URL: createOptionalUrl({ nodeEnv: () => env.NODE_ENV }).pipe(
z.string()
),
TWITCH_WEBHOOK_PORT: z.coerce
.number()
.int()
.min(1024)
.max(65535)
.default(8087),
TWITCH_READINESS_PATH: privatePath,
})
.refine(
(value) =>
value.TWITCH_BOT_USER_ID !== value.TWITCH_BOOTSTRAP_BROADCASTER_USER_ID,
{
path: ["TWITCH_BOOTSTRAP_BROADCASTER_USER_ID"],
message: "The dedicated bot must differ from the broadcaster.",
}
)
return parseEnvironment(schema, env)
}
export type TwitchRuntimeEnv = ReturnType<typeof resolveTwitchRuntimeEnv>
export function resolveTwitchOperatorEnv(
env: Record<string, string | undefined> = process.env
) {
const value = resolveTwitchCredentials(env)
const redirect = createOptionalUrl({ nodeEnv: () => env.NODE_ENV })
.pipe(z.string())
.safeParse(env.TWITCH_BOT_REDIRECT_URI)
if (!redirect.success)
throw new Error("Invalid Twitch environment: TWITCH_BOT_REDIRECT_URI")
const url = new URL(redirect.data)
if (
url.protocol !== "http:" ||
url.hostname !== "localhost" ||
!url.port ||
url.pathname !== "/callback" ||
url.username ||
url.password ||
url.search ||
url.hash
) {
throw new Error(
"TWITCH_BOT_REDIRECT_URI must be http://localhost:<port>/callback for the local operator utility."
)
}
return { ...value, TWITCH_BOT_REDIRECT_URI: url.href }
}
function parseEnvironment<T>(
schema: z.ZodType<T>,
env: Record<string, string | undefined>
): T {
const result = schema.safeParse(env)
if (!result.success) {
const keys = [
...new Set(result.error.issues.map((issue) => issue.path.join("."))),
].join(", ")
throw new Error(`Invalid Twitch environment: ${keys}`)
}
return result.data
}
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