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apollo-link-firebase

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:fire: :link: apollo-link-firebase provides you a simple way to use Firebase with graphQL.

파일 탐색기

최종 버전 다운로드 (.zip)

- config.yml
- settings.json
- - package.json
  - tsconfig.json
  - webpack.config.dev.js
  - yarn.lock
- - link.ts
  - mutationResolver.ts
  - queryResolver.ts
  - subscriptionLink.ts
  - types.ts
  - utils.ts
- index.ts
- database.ts
- rtdbLink.spec.ts
.editorconfig
.gitignore
LICENSE
package.json
README.md
tsconfig.json
tsconfig.release.json
tslint.json
webpack.config.prod.js
yarn.lock

# 설치 가이드

1. 코드 내려받기

git clone https://github.com/CannerCMS/apollo-link-firebase

깃허브에서 프로젝트 코드 전체를 내 컴퓨터로 내려받습니다.

cd apollo-link-firebase

방금 내려받은 프로젝트 폴더 안으로 이동합니다.

2. Node.js

쉬움 추천

사전 준비물

Git GitHub에서 프로젝트 코드를 내려받으려면 필요합니다.
Node.js npm 명령어를 쓰려면 Node.js가 설치되어 있어야 합니다. LTS(장기지원) 버전을 추천합니다.

npm install

package.json에 명시된 라이브러리들을 내려받아 설치합니다.

npm start

개발/실행 서버를 켭니다.

✅ 명령어 실행 후 터미널에 나타나는 주소(보통 http://localhost:3000 형태)를 브라우저에서 열어보세요.

// repository documentation

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[![npm version](https://badge.fury.io/js/apollo-link-firebase.svg)](https://badge.fury.io/js/apollo-link-firebase) [![CircleCI](https://circleci.com/gh/Canner/apollo-link-firebase.svg?style=shield)](https://circleci.com/gh/Canner/apollo-link-firebase) [![gitter](https://img.shields.io/gitter/room/nwjs/nw.js.svg)](https://gitter.im/Canner/apollo-link-firebase)

## Apollo-link-firebase
apollo-link-firebase provides you a simple way to query Firebase in graphQL with [Apollo-client](https://www.apollographql.com/client/) **without building a graphQL server**

Currently, we support features below:

1. **Query**: All sorting and filtering methods on [document](https://firebase.google.com/docs/database/web/lists-of-data#sorting_and_filtering_data) are supported.
1. **Mutation**: deal with `set`, `update`, `remove` methods with graphQL mutation.
1. **Realtime Subscription**: Listen to your [Firebase events](https://firebase.google.com/docs/database/web/lists-of-data#listen_for_child_events) using graphQL Subscription.
1. **Data Join**: Retrieve your data from different paths using **one graphQL**.

## Contents
* [Installation](#installation)
* [Quickstart](#quickstart)
* [Retrieve Object Data](#retrieve-object-data)
* [Work With Lists of Data](#work-with-lists-of-data)
* [Mutation](#mutation)
* [Subscription](#subscription)
* [Example](#example)

## Installation
``` console
yarn add apollo-link-firebase
```

## Quickstart
``` typescript
// rtdb stands for realtime database
import {createRtdbLink} from 'apollo-link-firebase';
import * as firebase from 'firebase';

// initialize firebase
firebase.initializeApp({
  // configs
});

// create Realtime Database link
const rtdbLink = createRtdbLink({
  database: firebase.database()
});

const client = new ApolloClient({
  link: rtdbLink,
  cache: new InMemoryCache(),
});

// A simple query to retrieve data from 
// firebase.database().ref("/profile/me")
// @rtdbQuery stands for Realtime Database Query
const query = gql`
  query myProfile {
    me @rtdbQuery(ref: "/profile/me") {
      name
    }
  }
`;

// Invoke the query and log the person's name
client.query({ query }).then(response => {
  console.log(response.data.name);
});
```

## Retrieve Object Data
### Return with __typename
In Apollo client, `InMemoryCache` use `__typename` and `id` to save your data in store.

Using `@key` directive, you can speficy which field you want to return with the [key of snapshot](https://firebase.google.com/docs/reference/js/firebase.database.DataSnapshot?authuser=0#key)
``` js
const query = gql`
  query myProfile {
    me @rtdbQuery(ref: "/profile/me", type: "Profile") {
      id @key
      name
    }
  }
`;
```
#### Response
``` js
{
  __typename: "Profile",
  id: "me",
  name: "wwwy3y3"
}
```

## Work with Lists of Data
For example, your data in Firebase could be like
``` js
{
  users: {
    id1: {
      name: "alovelace",
      birth: 1815
    },
    id2: {
      name: "ghopper",
      birth: 1906
    }
  }
}
```

### Basic Query
We can query all users, and use `@array` directive to parse data to array
``` js
const query = gql`
  query getUsers {
    users @rtdbQuery(ref: "/users", type: "Users") @array {
      id @key
      name
    }
  }
`;
```
#### Response
``` js
[{
  __typename: "Users",
  id: "id1",
  name: "alovelace",
  birth: 1815
}, {
  __typename: "Users",
  id: "id2",
  name: "ghopper",
  birth: 1906
}]
```

### Advance Query
In firebase client js sdk, We can get data by using [sorting and filtering API](https://firebase.google.com/docs/database/web/lists-of-data#sorting_and_filtering_data)

We provide corresponding API in `@rtdbQuery` directive arguments. In the following example, we query lists of data using `orderByChild("birth")` and `limitToFirst(1)`
``` js
const query = gql`
  query getUsers {
    users @rtdbQuery(ref: "/users", orderByChild: "birth", limitToFirst: 1, type: "Users") {
      name
    }
  }
`;
```

#### Response
``` js
[{
  __typename: "Users",
  id: "id1",
  name: "alovelace",
  birth: 1815
}]
```

### rtdbQuery Directive Arguments
* `ref`: string
* `orderByChild`: string
* `orderByKey`: boolean. e,g `orderByKey: true`
* `orderByValue`: boolean
* `startAt`: any
* `endAt`: any
* `equalTo`: any
* `limitToFirst`: number
* `limitToLast`: number

### More Examples
* [Basic API Usage](https://github.com/Canner/apollo-link-firebase/wiki/Simple-Query-Example) (orderBy*, limitTo*...)
* [Advanced API Usage](https://github.com/Canner/apollo-link-firebase/wiki/Advance-Query) (nested array, data join...)

## Mutation
We only take payload from `input` key from the recommendations in this [article](https://dev-blog.apollodata.com/designing-graphql-mutations-e09de826ed97)

``` js
const mutation = gql`
  fragment Input on firebase {
    string: String
    number: Number
  }

mutation($ref: string, $input: Input!) {
    updateArticle(input: $input) @rtdbUpdate(ref: $ref, type: "Article") {
      id @key
      string
      number
    }
  }
`;
```

We support four directives for mutation
* `@rtdbUpdate`: Firebase [update](https://firebase.google.com/docs/reference/js/firebase.database.Reference?authuser=0#update)
* `@rtdbSet`: Firebase [set](https://firebase.google.com/docs/reference/js/firebase.database.Reference?authuser=0#set)
* `@rtdbRemove`: Firebase [remove](https://firebase.google.com/docs/reference/js/firebase.database.Reference?authuser=0#remove)
* `@rtdbPush`: Push new element under ref, sugar api for firebase [push and set](https://firebase.google.com/docs/reference/js/firebase.database.Reference?authuser=0#push)
### Examples
#### @rtdbRemove
``` js
const mutation = gql`
  mutation($ref: string) {
    remove @rtdbRemove(ref: $ref)
  }
`;
```

#### @rtdbPush and @pushKey
``` js
const mutation = gql`
  fragment ProfileInput on firebase {
    string: String
    number: Number
  }

mutation($ref: string, $input: ProfileInput!) {
    pushdata(input: $input) @rtdbPush(ref: $ref) {
      id @pushKey
      string
      number
    }
  }
`;

// variables
const variables = {
  ref: "/users",
  input: {
    string: "string",
    number: 1
  }
}

// response
{
  id: "-KjCIvxsKueb3Hf2LIOp",
  string: "string",
  number: 1
}
```

## Subscription
We support four events in Firebase, more on [Firebase document](https://firebase.google.com/docs/database/web/lists-of-data?authuser=0#listen_for_child_events)

You can use all the query api supported in `@rtdbQuery`, more advanced query examples in [wiki](https://github.com/Canner/apollo-link-firebase/wiki/Advance-Query)
### Usage
``` js
const subQuery = gql`
  subscription {
    newComment @rtdbSub(ref: "/comments", event: "value") {
      id @key
      content
    }
  }
`;
```
### Directives
* `value`: `@rtdbSub(ref: string, event: "value")`
* `child_added`: `@rtdbSub(ref: string, event: "child_added")`
* `child_changed`: `@rtdbSub(ref: string, event: "child_changed")`
* `child_removed`: `@rtdbSub(ref: string, event: "child_removed")`

## Example
### Simple Todo React Application
[![](https://i.imgur.com/rlCTO4V.png)](https://github.com/Canner/apollo-link-firebase/tree/master/examples/simple-todo)
Here's a simple [React + apollo-link-firebase todo app](https://github.com/Canner/apollo-link-firebase/tree/master/examples/simple-todo)

## Roadmap
* support firebase transaction
* support firestore
* support authenticate mutation
* support storage mutation

## Contribution
Contributions are **welcome and extremely helpful** 🙌

Feel free to join [our gitter channel](https://gitter.im/Canner/apollo-link-firebase) to discuss with us!

[![](https://user-images.githubusercontent.com/26116324/37811196-a437d930-2e93-11e8-97d8-0653ace2a46d.png)](https://www.canner.io/)