neeto-comments-nano

The neeto-comments-nano manages comments within an application, notifying mentioned users via email based on their preferences.

Contents

1. Development with Host Application
   • Engine
     • Installation
     • Usage
2. Instructions for Publishing

Development with Host Application

Engine

The engine handles the backend of the comments table and notifies preferred users via email upon the creation of a new comment.

Installation

1. Add this line to your application's Gemfile:

    source "NEETO_GEM_SERVER_URL" do
      # ..existing gems
   
      gem "neeto-comments-engine"
    end
   

2. And then execute:

   bundle install
   

3. Add this line to your application's config/routes.rb file:

    mount NeetoCommentsEngine::Engine, at: "/neeto_comments"
   

4. Run the command to bring in all migrations required from the engine to the host application:

   bundle exec rails neeto_comments_engine:install:migrations
   

5. Add the migrations to the database:

   bundle exec rails db:migrate
   

Usage

Model

NeetoCommentsEngine::Comment (source code)

This model has the following polymorphic associations

belongs_to :commentable, polymorphic: true
belongs_to :creator, polymorphic: true

Here, commentable is the entity for which we add a comment. For example, In NeetoPlanner, Task is a commentable entity. We can add comments in a Task as follows:

has_many :comments, as: :commentable, dependent: :destroy

Similarly creator is the entity which created the comment.

In the host app, we can use the Comment model by inheriting from it as follows:

class Comment < NeetoCommentsEngine::Comment
  self.table_name = "neeto_comments_engine_comments"
end

The following methods are required in the inherited model of the host app to notify users mentioned in the comment as soon as a comment is created:

    def email_data
      {
        preference_link:,      # Notification preference URL
        organization_name:,
        link_title:,           # Title
        subject:,              # Subject
        reply_to:              # Reply to email
      }
    end

The get_mentioned_ids_from_content method returns the list of ids of the mentioned users that needs to be notified and can be used as follows:

    def notifiable_users
      user_list = get_mentioned_ids_from_content(content)
      User.where(id: user_list)
    end

Controllers

NeetoCommentsEngine::Api::V1::CommentsController (source code)

In the host app, we can inherit the CommentsController as follows:

class Api::V1::CommentsController < NeetoCommentsEngine::Api::V1::CommentsController
  private

    def load_commentable!
      # required method in the host application to load the commentable entity
    end
end

Concern

NeetoCommentsEngine::NotificationPreferences (source code)

Include the following concern to the commentable model

include NeetoCommentsEngine::NotificationPreferences

The notify_mentioned_user?(user) returns a boolean value which decides whether to send email to that user or not. By default the method returns true. This can be overriden by the host application.

   def notify_mentioned_user?(user)
     true
   end

The notify_mentions_via_email? returns a boolean value which decides whether to send email for that commentable entity or not. By default the method returns true. This can be overriden by the host application.

    def notify_mentions_via_email?
      true
    end

Instructions for Publishing

Consult the building and releasing packages guide for details on how to publish.