agenda-libre-ruby/app/controllers/tags_controller.rb

# Manage event tags
class TagsController < InheritedResources::Base
  has_scope :region, :locality, :daylimit
  has_scope :period, type: :hash, using: [:year, :week]
  has_scope :tag, as: :id

  def index
    @tags = apply_scopes(Event.moderated)
            .pluck(:tags).map(&:split).flatten
            .group_by { |i| i }
            .map { |k, v| [k, v.size] }
            .reject { |_k, v| v <= 3 }
            .sort

    respond_to do |format|
      format.html
      format.json { render json: @tags }
    end
  end

  def show
    @events_future = apply_scopes(Event).moderated.future
    @events_past = apply_scopes(Event).moderated.past
  end
end