https://github.com/hbmartin/firebase-chat-cloud

https://github.com/hbmartin/firebase-chat-cloud

Last synced: 6 months ago
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• Host: GitHub
• URL: https://github.com/hbmartin/firebase-chat-cloud
• Owner: hbmartin
• License: apache-2.0
• Created: 2017-07-23T13:56:20.000Z (about 8 years ago)
• Default Branch: master
• Last Pushed: 2017-07-23T18:19:51.000Z (about 8 years ago)
• Last Synced: 2025-02-06T05:17:11.096Z (8 months ago)
• Language: JavaScript
• Size: 7.81 KB
• Stars: 0
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# Tracking the number of messages, and update participants' inboxes

This template shows how to keep track of the number of elements in a Firebase Database list.

This is used to track conversation meta and inbox updates when a new message is posted

## Functions Code

See file [functions/index.js](functions/index.js) for the code.

This is done by updating a `meta/total` property on the parent of the list node which is tracked.

This counting is done in two cases:

1. When a like is added or deleted, the `likes_count` is incremented or decremented.

2. When the `likes_count` is deleted, all likes are recounted.

The dependencies are listed in [functions/package.json](functions/package.json).

## Sample Database Structure

As an example we'll be using the database structure shown below. It keeps tracks of the list of users who liked a post and the count of these likes:

```

/functions-project-12345

    /posts

        /key-123456

            likes_count: 32

            /likes 

                user123456: true

                user456789: true

                user786245: true

                ...

```