Class: Lookout::GoalsPresenter

Inherits:
Object
  • Object
show all
Defined in:
app/presenters/lookout/goals_presenter.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(event_query) ⇒ GoalsPresenter

Returns a new instance of GoalsPresenter.



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# File 'app/presenters/lookout/goals_presenter.rb', line 4

def initialize(event_query)
  @event_query = event_query
  @goals = nil
end

Instance Attribute Details

#goals ⇒ Object (readonly)

Returns the value of attribute goals.



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# File 'app/presenters/lookout/goals_presenter.rb', line 3

def goals
  @goals
end

Instance Method Details

#as_json ⇒ Object 



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# File 'app/presenters/lookout/goals_presenter.rb', line 61

def as_json
  {
    steps: @steps.as_json,
    total: total
  }
end

#build ⇒ Object

this is a dumpster fire



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# File 'app/presenters/lookout/goals_presenter.rb', line 10

def build
  if Lookout.config.goals.none?
    @goals = []
    return self
  end

  queries = {
    totals: @event_query.select("count(distinct(#{Lookout.event.table_name}.visit_id)) as unique_visits, '_internal_total_visits_' as name, count(distinct #{Lookout.event.table_name}.id) as total_events, 0 as sort_order")
  }
  selects = ["SELECT unique_visits, name, total_events, sort_order, 0 as cr, '' as goal_id from totals"]
  last_goal = nil
  map = {}.with_indifferent_access

  Lookout.config.goals.each_with_index do |goal, index|
    queries[goal.id] = @event_query.select(
      [
        "count(distinct(#{Lookout.event.table_name}.visit_id)) as unique_visits" ,
        "'#{goal.id}' as name",
        "count(distinct #{Lookout.event.table_name}.id) as total_events",
        "#{index + 1} as sort_order",
        "'#{goal.id}' as goal_id"
      ]
    ).merge(goal.event_query.call).group("#{Lookout.event.table_name}.name")
    # Cast 0 to decimal/real depending on database
    zero_decimal = Lookout::DatabaseAdapter.postgresql? ? "0::decimal" : "0.0"
    selects << ["SELECT unique_visits, name, total_events, sort_order, #{zero_decimal} as cr, '#{goal.id}' as goal_id from #{goal.id}"]
    map[goal.id] = goal
    last_goal = goal
  end

  # activerecord quirk / with bug
  select = selects.join(" UNION ").delete_suffix(" from #{last_goal.id}")
  select = select.delete_prefix("SELECT ")
  steps = ::Ahoy::Event.with(
    queries,
    ).select(select).from("#{last_goal.id}").order("sort_order asc").index_by(&:name)
  totals = steps.delete("_internal_total_visits_")

  @goals = steps.keys.collect do |name|
    step = steps[name]
    step.name = map[name].title
    step.cr = ((step.total_events.to_d / totals.total_events.to_d) * 100).round(2)
    step
  end
  self
end

#to_json ⇒ Object 



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# File 'app/presenters/lookout/goals_presenter.rb', line 68

def to_json
  as_json.to_json
end

#total_visitors ⇒ Object 



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# File 'app/presenters/lookout/goals_presenter.rb', line 57

def total_visitors
  @total_visitors ||= @event_query.select(:visit_id).distinct.count
end