Nest.js Amplitude Module

A tiny package to make a bridge between Nest.js DI system and Amplitude client instance.

Table of Contents

• Nest.js Amplitude Module
• Table of Contents
• Installation
• Usage
• Contributing
• License

Installation

You can install nestjs-amplitude using npm or yarn:

npm i nestjs-amplitude @amplitude/node --save
# or
yarn add nestjs-amplitude @amplitude/node

The package also requires it's peer dependencies to be installed. Likely you already have @nestjs/common installed - that is the reason why it is not specified in the snippet above.

Usage

You may register AmplitudeModule synchronously as follows.

import { Module } from '@nestjs/common';
import { AmplitudeModule } from 'nestjs-amplitude';

@Module({
imports: [
    AmplitudeModule.register({
      apiKey: 'amplitude_api_key',
      debug: true,
    })
})
export class AppModule {}

AmplitudeModule may also be registered asynchronously with a factory or a value. Let's imagine we are using a ConfigService and want to get Amplitude options from it. We may do it as follows:

import { Module } from '@nestjs/common';
import { AmplitudeModule } from 'nestjs-amplitude';
import { ConfigModule, ConfigService } from '<config_module>';

@Module({
imports: [
    AmplitudeModule.registerAsync({
        imports: [ConfigModule],
        inject: [ConfigService],
        useFactory: (configService: ConfigService) => configService.get('amplitude'),
    }),
})
export class AppModule {}

When registered, AmplitudeService may be injected into Nest.js injectables as usual:

import { Injectable, Controller, Get } from "@nestjs/common";
import { AmplitudeService } from "nestjs-amplitude";

@Injectable()
@Controller()
export class SomeService {
    constructor(private readonly amplitudeService: AmplitudeService) {}

    @Get()
    async listAllOffers() {
        const offers = [];

        this.amplitudeService.logEvent({
            event_type: "Node.js Event",
            user_id: "[email protected]",
            location_lat: 37.77,
            location_lng: -122.39,
            ip: "127.0.0.1",
            event_properties: {
                keyString: "valueString",
                keyInt: 11,
                keyBool: true,
            },
        });

        return offers;
    }
}

AmplitudeService instance exposes all Node.js Amplitude SDK Client methods as it's own. You may find SDK specification here.

Contributing

Feel free to send any suggestions in GitHub issues or open a Pull Request with your feature.

License

MIT