Class: Decidim::Comments::VoteComment

Inherits:
Decidim::Command show all
Defined in:
decidim-comments/app/commands/decidim/comments/vote_comment.rb

Overview

A command with all the business logic to upvote a comment

Instance Method Summary collapse

Methods inherited from Decidim::Command

call, #evaluate, #method_missing, #respond_to_missing?, #transaction, #with_events

Constructor Details

#initialize(comment, author, options = { weight: 1 }) ⇒ VoteComment

Public: Initializes the command.

comment - A comment author - A user options - An optional hash of options (default: { weight: 1 })

* weight: The vote's weight. Valid values 1 and -1.



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# File 'decidim-comments/app/commands/decidim/comments/vote_comment.rb', line 13

def initialize(comment, author, options = { weight: 1 })
  @comment = comment
  @author = author
  @weight = options[:weight]
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class Decidim::Command

Instance Method Details

#call ⇒ Object

Executes the command. Broadcasts these events:

  • :ok when everything is valid.

  • :invalid if the vote was not create

Returns nothing.



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# File 'decidim-comments/app/commands/decidim/comments/vote_comment.rb', line 25

def call
  case @weight
  when 1
    previous_vote = @comment.up_votes.find_by(author: @author)
    if previous_vote
      previous_vote.destroy!
    else
      @vote = @comment.up_votes.create!(author: @author)
    end
  when -1
    previous_vote = @comment.down_votes.find_by(author: @author)
    if previous_vote
      previous_vote.destroy!
    else
      @vote = @comment.down_votes.create!(author: @author)
    end
  else
    return broadcast(:invalid)
  end

  notify_comment_author if @vote
  broadcast(:ok, @comment)
rescue ActiveRecord::RecordInvalid, ActiveRecord::RecordNotUnique
  broadcast(:invalid)
end

#notify_comment_author ⇒ Object 



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# File 'decidim-comments/app/commands/decidim/comments/vote_comment.rb', line 51

def notify_comment_author
  Decidim::EventsManager.publish(
    event: "decidim.events.comments.comment_#{upvote? ? "upvoted" : "downvoted"}",
    event_class: upvote? ? Decidim::Comments::CommentUpvotedEvent : Decidim::Comments::CommentDownvotedEvent,
    resource: @comment.commentable,
    affected_users: [@comment.author],
    extra: {
      comment_id: @comment.id,
      weight: @weight,
      downvotes: @comment.down_votes.count,
      upvotes: @comment.up_votes.count
    }
  )
end