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https://github.com/gaurishhs/elysia-session

Sessions plugin for Elysia
https://github.com/gaurishhs/elysia-session

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Sessions plugin for Elysia

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README

        

# Elysia Session

![badge](https://github.com/gaurishhs/elysia-session/actions/workflows/npm-publish.yml/badge.svg)

## Features

- Runs in Bun, Cloudflare Workers, and those supported by Elysia.
- Flash messages — data that is deleted once it's read (one-off error messages, etc.)
- Built-in Memory, Bun SQLite and Cookie stores.

## Installation

```bash
bun a elysia-session
```

## Documentation

There are 3 stores in-built in this package:

1. Memory Store
2. Cookie Store
3. Bun SQLite Store

You can implement your own store by implementing the `Store` interface as shown below:

```ts
import { Context } from "elysia";
import { Store } from "elysia-session/store";
import { SessionData } from "elysia-session/session";

export class MyCustomStore implements Store {
constructor() {
// ...
}
getSession(id?: string, ctx?: Context): SessionData | null | undefined | Promise {
// ...
}
createSession(data: SessionData, id?: string, ctx?: Context): Promise | void {
// ...
}
persistSession(data: SessionData, id?: string, ctx?: Context): Promise | void {
// ...
}
deleteSession(id?: string, ctx?: Context): Promise | void {
// ...
}
}
```

### Usage

#### Memory Store

```ts
import { sessionPlugin } from "elysia-session";
import { MemoryStore } from "elysia-session/stores/memory"
import Elysia from "elysia";

new Elysia()
.use(sessionPlugin({
cookieName: "session", // Optional
store: new MemoryStore(),
expireAfter: 15 * 60, // 15 minutes
})).get("/", () => 'Hi').listen(3000);
```

#### Cookie Store

```ts
import { sessionPlugin } from "elysia-session";
import { CookieStore } from "elysia-session/stores/cookie"
import Elysia from "elysia";

new Elysia()
.use(sessionPlugin({
cookieName: "session", // Optional, defaults to "session"
store: new CookieStore({
cookieOptions: {
httpOnly: true
}, // Optional, defaults to {}
cookieName: "session" // Optional, defaults to "session"
}),
expireAfter: 15 * 60, // 15 minutes
})).get("/", () => 'Hi').listen(3000);
```

#### Bun SQLite Store

```ts
import { sessionPlugin } from "elysia-session";
import { BunSQLiteStore } from "elysia-session/stores/bun/sqlite"
import { Database } from "bun:sqlite";
import Elysia from "elysia";

const database = new Database(":memory:");
// 2nd argument is the table name
const store = new BunSQLiteStore(database, "sessions");

new Elysia()
.use(sessionPlugin({
cookieName: "session", // Optional, default is "session"
store,
expireAfter: 15 * 60, // 15 minutes
})).get("/", () => 'Hi').listen(3000);
```

## Community Stores

Mongoose (@macnak)

```ts
import { Context } from "elysia";
import { SessionData } from "elysia-session/session";
import { Store } from "elysia-session/store";
import * as mongoose from 'mongoose';

export interface ISession extends mongoose.Document {
_id: string;
sessionData: SessionData;
}

export class MongooseStore implements Store {
private db: typeof import('mongoose');
private collection: string;
private schema: mongoose.Schema | null;
private model: mongoose.Model | null;

constructor(db: typeof import('mongoose'), collection: string) {
this.db = db;
this.collection = collection;
this.schema = new mongoose.Schema({
_id: String,
sessionData: { type: JSON },
})
this.model = mongoose.model(collection, this.schema);
}

getSession (id?: string | undefined, ctx?: Context): SessionData | Promise | null | undefined {
if (!id) return null;
if (this.model) {
this.model.findOne({ _id: id }, (err: Error, session: ISession) => {
if (err || !session) return null;
return session.sessionData
})
} else
return null
}

createSession (data: SessionData, id: string, ctx?: Context): void | Promise {
console.log("createSession")
if (this.model) {
const session = new this.model({
_id: id,
sessionData: data,
})
session.save();
}
}

deleteSession (id?: string | undefined, ctx?: Context): void | Promise {
if (!id) return;
console.log("deleteSession")
if (this.model) {
this.model.deleteOne({ _id: id })
}
}

persistSession (data: SessionData, id?: string, ctx?: Context): Promise | void {
if (!id) return;
console.log("persistSession")
if (this.model) {
this.model.updateOne({ _id: id }, { sessionData: data })
}
}
}
```

### Flash Messages

Flash messages are one-off messages that are deleted once they are read. They are useful for displaying error messages, etc.

### Session Data

Using '/testsession', see how this can be used
```ts
import { sessionPlugin } from "elysia-session";
import { MemoryStore } from "elysia-session/stores/memory"
import Elysia from "elysia";

new Elysia()
.use(sessionPlugin({
cookieName: "session", // Optional
store: new MemoryStore(),
expireAfter: 15 * 60, // 15 minutes
})).get("/", (ctx) => {
ctx.session.flash("error", "Something went wrong!");
return 'Hi';
}).get('/testsession', (ctx) => {
if (ctx.session.get('xx') === null) {
ctx.session.set('xx', 2)
console.log(2)
} else {
ctx.session.set('xx', ctx.session.get('xx') + 3)
console.log(5)
}
if (ctx.session.get('yy') === null) {
ctx.session.set('yy', 1)
console.log(1)
} else {
ctx.session.set('yy', ctx.session.get('yy') + 1)
console.log(3)
}
return JSON.stringify(ctx.session)
})
.listen(3000);
```

## License

MIT

## Author

Copyright (c) 2023 Gaurish Sethia, All rights reserved.
Updates 2024 Jay Kelkar