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firebase-functions

firebase-functions

github.com/bumgeunsongDevelopment945 installsUpdated 1w ago
Repository

About firebase-functions

firebase-functions is a development-pattern skill for Firebase Functions projects, covering TypeScript function organization, error handling, and build and test steps. It is for developers maintaining Firestore-triggered functions and related backend code.

Key features

  1. 01Show function directory organization
  2. 02Provide a Firestore trigger example
  3. 03Describe an error-handling pattern
  4. 04List build and Jest test commands

Use cases

  1. 01Plan a Firebase Functions project structure
  2. 02Write a Firestore document-created trigger
  3. 03Handle errors in asynchronous function work
  4. 04Build functions and run tests

Install

Copy the command and run it in a terminal.

$npx skills add https://github.com/bumgeunsong/daily-writing-friends --skill firebase-functions

After installing, type/firebase-functionsin Claude Code to confirm it loaded.

Details

From the project README

Firebase Functions Patterns

Directory Structure

functions/
├── src/
│   ├── index.ts              # Function exports
│   ├── admin.ts              # Firebase Admin SDK init
│   ├── backfill/             # Data migration scripts
│   ├── commentSuggestion/    # AI comment features
│   ├── commentings/          # Comment activity tracking
│   ├── notifications/        # Push notification functions
│   ├── postings/             # Post activity tracking
│   ├── replyings/            # Reply activity tracking
│   └── shared/               # Shared utilities

Function Structure

import { onDocumentCreated } from 'firebase-functions/v2/firestore';
import admin from '../admin';
import { Post } from '../types/Post';

export const createPosting = onDocumentCreated(
  'boards/{boardId}/posts/{postId}',
  async (event) => {
    const postData = event.data?.data() as Post;
    const { boardId, postId } = event.params;

    if (!postData) {
      console.error('No post data found.');
      return null;
    }

    try {
      await admin.firestore()
        .collection('users')
        .doc(postData.authorId)
        .collection('postings')
        .add(postingData);
      console.log(`Created posting for user ${postData.authorId}`);
    } catch (error) {
      console.error('Error writing posting:', error);
    }

    return null;
  }
);

Error Handling

Don't throw - let function complete gracefully:

try {
  await admin.firestore().collection('...').add(data);
  console.log(`Successfully created ${resourceType}`);
} catch (error) {
  console.error(`Error creating ${resourceType}:`, error);
  // Don't throw - function should complete
}

return null;

Build & Test

cd functions && npm install   # Install deps
cd functions && npm run build # Compile TypeScript
cd functions && npm test      # Run Jest tests

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