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sandbox/tgbot/node_modules/grammy/out/convenience/session.d.ts
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sandbox/tgbot/node_modules/grammy/out/convenience/session.d.ts
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import { type MiddlewareFn } from "../composer.js";
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import { type Context } from "../context.js";
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type MaybePromise<T> = Promise<T> | T;
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/**
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* A session flavor is a context flavor that holds session data under
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* `ctx.session`.
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*
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* Session middleware will load the session data of a specific chat from your
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* storage solution, and make it available to you on the context object. Check
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* out the [documentation](https://grammy.dev/ref/core/session) on session
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* middleware to know more, and read the section about sessions on the
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* [website](https://grammy.dev/plugins/session).
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*/
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export interface SessionFlavor<S> {
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/**
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* Session data on the context object.
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*
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* **WARNING:** You have to make sure that your session data is not
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* undefined by _providing an initial value to the session middleware_, or
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* by making sure that `ctx.session` is assigned if it is empty! The type
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* system does not include `| undefined` because this is really annoying to
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* work with.
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*
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* Accessing `ctx.session` by reading or writing will throw if
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* `getSessionKey(ctx) === undefined` for the respective context object
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* `ctx`.
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*/
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get session(): S;
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set session(session: S | null | undefined);
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}
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/**
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* A lazy session flavor is a context flavor that holds a promise of some
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* session data under `ctx.session`.
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*
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* Lazy session middleware will provide this promise lazily on the context
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* object. Once you access `ctx.session`, the storage will be queried and the
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* session data becomes available. If you access `ctx.session` again for the
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* same context object, the cached value will be used. Check out the
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* [documentation](https://grammy.dev/ref/core/lazysession) on lazy session
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* middleware to know more, and read the section about lazy sessions on the
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* [website](https://grammy.dev/plugins/session#lazy-sessions).
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*/
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export interface LazySessionFlavor<S> {
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/**
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* Session data on the context object, potentially a promise.
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*
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* **WARNING:** You have to make sure that your session data is not
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* undefined by _providing a default value to the session middleware_, or by
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* making sure that `ctx.session` is assigned if it is empty! The type
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* system does not include `| undefined` because this is really annoying to
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* work with.
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*
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* Accessing `ctx.session` by reading or writing will throw iff
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* `getSessionKey(ctx) === undefined` holds for the respective context
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* object `ctx`.
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*/
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get session(): MaybePromise<S>;
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set session(session: MaybePromise<S | null | undefined>);
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}
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/**
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* A storage adapter is an abstraction that provides read, write, and delete
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* access to a storage solution of any kind. Storage adapters are used to keep
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* session middleware independent of your database provider, and they allow you
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* to pass your own storage solution.
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*/
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export interface StorageAdapter<T> {
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/**
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* Reads a value for the given key from the storage. May return the value or
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* undefined, or a promise of either.
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*/
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read: (key: string) => MaybePromise<T | undefined>;
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/**
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* Writes a value for the given key to the storage.
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*/
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write: (key: string, value: T) => MaybePromise<void>;
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/**
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* Deletes a value for the given key from the storage.
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*/
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delete: (key: string) => MaybePromise<void>;
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/**
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* Checks whether a key exists in the storage.
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*/
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has?: (key: string) => MaybePromise<boolean>;
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/**
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* Lists all keys.
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*/
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readAllKeys?: () => Iterable<string> | AsyncIterable<string>;
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/**
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* Lists all values.
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*/
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readAllValues?: () => Iterable<T> | AsyncIterable<T>;
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/**
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* Lists all keys with their values.
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*/
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readAllEntries?: () => Iterable<[key: string, value: T]> | AsyncIterable<[key: string, value: T]>;
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}
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/**
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* Options for session middleware.
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*/
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export interface SessionOptions<S, C extends Context = Context> {
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type?: "single";
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/**
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* **Recommended to use.**
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*
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* A function that produces an initial value for `ctx.session`. This
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* function will be called every time the storage solution returns undefined
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* for a given session key. Make sure to create a new value every time, such
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* that different context objects do that accidentally share the same
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* session data.
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*/
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initial?: () => S;
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/**
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* An optional prefix to prepend to the session key after it was generated.
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*
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* This makes it easier to store session data under a namespace. You can
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* technically achieve the same functionality by returning an already
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* prefixed key from `getSessionKey`. This option is merely more convenient,
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* as it does not require you to think about session key generation.
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*/
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prefix?: string;
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/**
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* This option lets you generate your own session keys per context object.
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* The session key determines how to map the different session objects to
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* your chats and users. Check out the
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* [documentation](https://grammy.dev/plugins/session#how-to-use-sessions)
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* on the website about how to use session middleware to know how session
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* keys are used.
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*
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* The default implementation will store sessions per chat, as determined by
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* `ctx.chatId`.
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*/
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getSessionKey?: (ctx: Omit<C, "session">) => MaybePromise<string | undefined>;
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/**
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* A storage adapter to your storage solution. Provides read, write, and
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* delete access to the session middleware.
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*
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* Consider using a [known storage
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* adapter](https://grammy.dev/plugins/session#known-storage-adapters)
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* instead of rolling your own implementation of this.
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*
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* The default implementation will store session in memory. The data will be
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* lost whenever your bot restarts.
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*/
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storage?: StorageAdapter<S>;
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}
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/**
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* Options for session middleware if multi sessions are used. Specify `"type":
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* "multi"` in the options to use multi sessions.
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*/
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export type MultiSessionOptions<S, C extends Context> = S extends Record<string, any> ? {
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type: "multi";
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} & MultiSessionOptionsRecord<S, C> : never;
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type MultiSessionOptionsRecord<S extends Record<string, unknown>, C extends Context> = {
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[K in keyof S]: SessionOptions<S[K], C>;
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};
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/**
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* Session middleware provides a persistent data storage for your bot. You can
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* use it to let your bot remember any data you want, for example the messages
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* it sent or received in the past. This is done by attaching _session data_ to
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* every chat. The stored data is then provided on the context object under
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* `ctx.session`.
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*
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* > **What is a session?** Simply put, the session of a chat is a little
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* > persistent storage that is attached to it. As an example, your bot can send
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* > a message to a chat and store the identifier of that message in the
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* > corresponding session. The next time your bot receives an update from that
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* > chat, the session will still contain that ID.
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* >
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* > Session data can be stored in a database, in a file, or simply in memory.
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* > grammY only supports memory sessions out of the box, but you can use
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* > third-party session middleware to connect to other storage solutions. Note
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* > that memory sessions will be lost when you stop your bot and the process
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* > exits, so they are usually not useful in production.
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*
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* Whenever your bot receives an update, the first thing the session middleware
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* will do is to load the correct session from your storage solution. This
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* object is then provided on `ctx.session` while your other middleware is
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* running. As soon as your bot is done handling the update, the middleware
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* takes over again and writes back the session object to your storage. This
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* allows you to modify the session object arbitrarily in your middleware, and
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* to stop worrying about the database.
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*
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* ```ts
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* bot.use(session())
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*
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* bot.on('message', ctx => {
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* // The session object is persisted across updates!
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* const session = ctx.session
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* })
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* ```
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*
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* It is recommended to make use of the `initial` option in the configuration
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* object, which correctly initializes session objects for new chats.
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*
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* You can delete the session data by setting `ctx.session` to `null` or
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* `undefined`.
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*
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* Check out the [documentation](https://grammy.dev/plugins/session) on the
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* website to know more about how sessions work in grammY.
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*
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* @param options Optional configuration to pass to the session middleware
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*/
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export declare function session<S, C extends Context>(options?: SessionOptions<S, C> | MultiSessionOptions<S, C>): MiddlewareFn<C & SessionFlavor<S>>;
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/**
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* > This is an advanced function of grammY.
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*
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* Generally speaking, lazy sessions work just like normal sessions—just they
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* are loaded on demand. Except for a few `async`s and `await`s here and there,
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* their usage looks 100 % identical.
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*
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* Instead of directly querying the storage every time an update arrives, lazy
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* sessions quickly do this _once you access_ `ctx.session`. This can
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* significantly reduce the database traffic (especially when your bot is added
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* to group chats), because it skips a read and a wrote operation for all
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* updates that the bot does not react to.
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*
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* ```ts
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* // The options are identical
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* bot.use(lazySession({ storage: ... }))
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*
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* bot.on('message', async ctx => {
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* // The session object is persisted across updates!
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* const session = await ctx.session
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* // ^
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* // |
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* // This plain property access (no function call) will trigger the database query!
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* })
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* ```
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*
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* Check out the
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* [documentation](https://grammy.dev/plugins/session#lazy-sessions) on the
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* website to know more about how lazy sessions work in grammY.
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*
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* @param options Optional configuration to pass to the session middleware
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*/
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export declare function lazySession<S, C extends Context>(options?: SessionOptions<S, C>): MiddlewareFn<C & LazySessionFlavor<S>>;
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/**
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* When enhancing a storage adapter, it needs to be able to store additional
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* information. It does this by wrapping the actual data inside an object, and
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* adding more properties to this wrapper.
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*
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* This interface defines the additional properties that need to be stored by a
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* storage adapter that supports enhanced sessions.
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*/
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export interface Enhance<T> {
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/** Version */
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v?: number;
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/** Data */
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__d: T;
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/** Expiry date */
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e?: number;
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}
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/** Options for enhanced sessions */
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export interface MigrationOptions<T> {
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/** The original storage adapter that will be enhanced */
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storage: StorageAdapter<Enhance<T>>;
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/**
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* A set of session migrations, defined as an object mapping from version
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* numbers to migration functions that transform data to the respective
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* version.
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*/
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migrations?: Migrations;
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/**
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* Number of milliseconds after the last write operation until the session
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* data expires.
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*/
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millisecondsToLive?: number;
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}
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/**
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* A mapping from version numbers to session migration functions. Each entry in
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* this object has a version number as a key, and a function as a value.
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*
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* For a key `n`, the respective value should be a function that takes the
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* previous session data and migrates it to conform with the data that is used
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* by version `n`. The previous session data is defined by the next key less
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* than `n`, such as `n-1`. Versions don't have to be integers, nor do all
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* versions have to be adjacent. For example, you can use `[1, 1.5, 4]` as
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* versions. If `n` is the lowest value in the set of keys, the function stored
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* for `n` can be used to migrate session data that was stored before migrations
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* were used.
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*/
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export interface Migrations {
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[version: number]: (old: any) => any;
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}
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/**
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* You can use this function to transform an existing storage adapter, and add
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* more features to it. Currently, you can add session migrations and expiry
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* dates.
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*
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* You can use this function like so:
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* ```ts
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* const storage = ... // define your storage adapter
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* const enhanced = enhanceStorage({ storage, millisecondsToLive: 500 })
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* bot.use(session({ storage: enhanced }))
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* ```
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*
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* @param options Session enhancing options
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* @returns The enhanced storage adapter
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*/
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export declare function enhanceStorage<T>(options: MigrationOptions<T>): StorageAdapter<T>;
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/**
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* The memory session storage is a built-in storage adapter that saves your
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* session data in RAM using a regular JavaScript `Map` object. If you use this
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* storage adapter, all sessions will be lost when your process terminates or
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* restarts. Hence, you should only use it for short-lived data that is not
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* important to persist.
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*
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* This class is used as default if you do not provide a storage adapter, e.g.
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* to your database.
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*
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* This storage adapter features expiring sessions. When instantiating this
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* class yourself, you can pass a time to live in milliseconds that will be used
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* for each session object. If a session for a user expired, the session data
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* will be discarded on its first read, and a fresh session object as returned
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* by the `initial` option (or undefined) will be put into place.
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*/
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export declare class MemorySessionStorage<S> implements StorageAdapter<S> {
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private readonly timeToLive?;
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/**
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* Internally used `Map` instance that stores the session data
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*/
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protected readonly storage: Map<string, {
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session: S;
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expires?: number;
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}>;
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/**
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* Constructs a new memory session storage with the given time to live. Note
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* that this storage adapter will not store your data permanently.
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*
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* @param timeToLive TTL in milliseconds, default is `Infinity`
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*/
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constructor(timeToLive?: number | undefined);
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read(key: string): S | undefined;
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/**
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* @deprecated Use {@link readAllValues} instead
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*/
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readAll(): S[];
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readAllKeys(): string[];
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readAllValues(): S[];
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readAllEntries(): [string, S][];
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has(key: string): boolean;
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write(key: string, value: S): void;
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delete(key: string): void;
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}
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export {};
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