firestore-rest-parser

firestore-rest-parser

Parse and use Firestore REST API JSON as a pure js object ✨

Or convert js object to Firestore REST structure.

Turn this:

{
  "data": {
    "mapValue": {
      "fields": {
        "username": {
          "stringValue": "user"
        },
        "isAdmin": {
          "booleanValue": true
        }
      }
    }
  }
}

Into this:

{
  "data": {
    "username": "user",
    "isAdmin": true
  }
}

Or vice versa.

Features

• Parse Firestore REST structure into js object
• Convert js object to Firestore REST compatible structure with type conversion
• Create full Firestore REST response structure

Installing

Using npm:

npm install firestore-rest-parser

Using yarn:

yarn add firestore-rest-parser

Example

import { parse } from 'firestore-rest-parser'

const obj = {
  name: 'resouce/name',
  fields: {
    permissions: {
      arrayValue: {
        values: [{ stringValue: 'createUsers' }],
      },
    },
    contacts: {
      mapValue: {
        email: {
          prop: {
            stringValue: '[e-mail]'
          },
        },
      },
    },
    unreadMessages: {
        integerValue: 5
    }
  },
  createTime: '',
  updateTime: '',
}

const data = parse(obj)

/*
  console.log(data) => {
    permissions: ['createUsers'],
    contacts: { email: '[e-mail]' },
    unreadMessages: 5
  }
*/

Usage

Parse

To parse Firestore REST structure use parse function.

import { parse } from 'firestore-rest-parser'

const firestoreObject = {
    fields: {
        prop: { integerValue: 1 }
    }
}

const data = parse(firestoreObject)

/*
  console.log(data) => {
    prop: 1
  }
 */

Convert

To convert js object to Firestore REST structure use convert function.

Note

Timestamp, Reference, Bytes, GeoPoint data types must be instances of type helper classes

import { convert } from 'firestore-rest-parser'

const data = {
  username: 'user',
  permissions: ['createUsers']
}

const res = convert(data)

/*
  console.log(res) => {
    username: {
      stringValue: 'user'
    },
    permissions: {
      arrayValue: {
        values: [
          { stringValue: 'createUsers' }
        ]
      }
    }
  }
 */

Type helpers

To store Date or timestamp value use Timestamp helper. Provided time will be converted to ISO format.

import { convert, Timestamp } from 'firestore-rest-parser'

const data = {
  date: new Timestamp(new Date()),
  timestamp: new Timestamp(1641727129175)
}

convert(data)

To store Buffer value use Bytes helper. Provided buffer will be converted to base64 string.

import { convert, Bytes } from 'firestore-rest-parser'

const data = {
  buff: new Bytes(Buffer.from('value'))
}

convert(data)

To store Reference (path to element in db) value use Reference helper.

import { convert, Reference } from 'firestore-rest-parser'

const data = {
  prop: new Reference('path/to/doc')
}

convert(data)

To store GeoPoint value use GeoPoint helper.

import { convert, GeoPoint } from 'firestore-rest-parser'

const data = {
  prop: new GeoPoint(0, 0)
}

convert(data)

Firestore REST object

convert function creates only part (fields) of the Firestore Rest object. To create full structure (with name, createTime, updateTime) use createRESTObject function.

import { convert, createRESTObject } from 'firestore-rest-parser'

const data = {
  username: 'user',
  permissions: ['createUsers']
}

const res = createRESTObject(convert(data), 'users/userId')

/* console.log(res) => {
     fields: { /.../ }
     name: 'users/userId',
     createTime: '',
     updateTime: ''
*/ }

Firestore type conversion

Javascript Type	Firestore Type	Type helper required
Null	Null
Boolean	Boolean
Number (int)	Integer
Number (float)	Double
Date or UTC timestamp	Timestamp	+
String	String
Buffer (base64 string)	Bytes	+
Reference (string path)	Reference	+
GeoPoint	GeoPoint	+
Array	Array
Object	Map