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🔥 Firestore Rulez 🔥

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Takes working with Firestore Security Rules to the next level.

This Node.js modules let's you split up your Firestore Security Rules firestore.rules file into multiple files. The module will combine the files, and if you wish, even add useful helpers functions to the mix so you don't have to define them yourself.

Give it a go and feel free to add additional helper functions to the repository!

Requirements

Make sure you have Node.js installed on your system (the newer, the better).

Installation

NPM:

npm i firestore-rulez --save-dev

yarn:

yarn add firestore-rulez --dev

Basic Usage

  1. Create a subfolder called /rules.

  2. Add as many .rules files to the folder as you like.

  3. Generate firestore.rules via the following command in your console:

firestore-rulez

Advanced Usage

  1. Create config file at project root

  2. Generate .rules files and helper functions inline with config file

  3. Generate firestore.rules via the following command in your console:

firestore-rulez

Generate rules file

You can run Firestore-Rulez by hitting firestore-rulez in your CLI.

firestore-rulez

This will create the firestore.rules file combining your files in the following way:

service cloud.firestore {
	match /databases/{database}/documents {

    // -> LIBRARY HELPER FUNCTIONS, if enabled

    // -> YOUR HELPER FUNCTIONS, if enabled

    // -> YOUR RULES FILES

  }
}

Configuration File Syntax

Firestore-Rulez can be configured by adding a rulez.config.js file to the project root or ./rules folders.

The file is to export a object with the following syntax:

Field Default Value Type Description
helpers ["authUserEmail", "authUserEmailIsVerified", "authUserUid", "existingData", "hasAmtOfWriteFields", "incomingData", "isAuthenticated"] array(strings) | boolean used to add helper functions to the output, this can be true to include all helper functions or false to include non of the helper functions or an array of the function names
custom_helpers_folder null null | string path to user defined helper functions
rules_version "1" "1" | "2" | 1 | 2 which version is the rules written in
rules_folder "rules" string folder where the rule fragments can be found
rules_output "firestore.rules" string name of the file to output to
use_firebase_config false boolean use the firebase config file firebase.json to get the rules output file name and location

Default Configuration File

module.exports = {
  helpers: [
    "authUserEmail",
    "authUserEmailIsVerified",
    "authUserUid",
    "existingData",
    "hasAmtOfWriteFields",
    "incomingData",
    "isAuthenticated",
  ],
  custom_helpers_folder: null,
  rules_version: 1,
  rules_folder: "rules",
  rules_output: "firestore.rules",
  use_firebase_config: false,
};

Helper Functions

The following helper functions are present, if the helpers option is enabled or the function is included:

name description
isAuthenticated Checks if user is authenticated
authUserUid Returns Current Auth User's Uid
authUserEmail Returns Current Auth User's Email
authUserEmailIsVerified Returns whether Current Auth User's Email is verified
existingData Returns the existing data
incomingData Returns the incoming data
hasAmtOfWriteFields Checks if the request has X write fields

Use the name of the functionin the rules files and in the configuration file to enable them in the configuration or set the helpers function to true to include them all.

isAuthenticated

// Checks if user is authenticated
function isAuthenticated() {
  return request.auth != null;
}

authUserUid

// Returns Current Auth User's Uid
function authUserUid() {
  return request.auth.uid;
}

authUserEmail

// Returns Current Auth User's Email
function authUserEmail() {
  return request.auth.token.email;
}

authUserEmailIsVerified

// Returns whether Current Auth User's Email is verified
function authUserEmailIsVerified() {
  return request.auth.token.email_verified;
}

existingData

// Returns the existing data
function existingData() {
  return resource.data;
}

incomingData

// Returns the incoming data
function incomingData() {
  return request.resource.data;
}

hasAmtOfWriteFields

// Checks if the request has X write fields
function hasAmtOfWriteFields(size) {
  return request.writeFields.size() == size;
}

Credits

Thanks to OneLunch Man for inspiring me to build this module on Stack Overflow and to Bullfrog1234 for the amazing pull-request #5 making this module rule(z) even more!

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