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module Semantic
module Subscribers
# LogSubscriber for event_group :action_view
class ActionView < LogSubscriber
include AnsiColors
REGEX_BASEDIR = %r{^#{Rails.root}/(.*)}
def initialize(*)
super(:view)
@partials = {}
end
def render_partial(event)
identifier = pathname(event.payload[:identifier])
partial_savings = @partials[event.transaction_id] ||= {}
partial_saving = partial_savings[identifier] ||= {}
origin = Rails.backtrace_cleaner.clean(caller)[1] # [0] is related to Instrumentalizer, get rid of it!
partial_saving[origin] = partial_saving.key?(origin) ? partial_saving[origin] + 1 : 1
end
def render_template(event)
layout = event.payload[:layout]
return unless layout
identifier = pathname(event.payload[:identifier])
return unless identifier
logger.debug do
pop_partial_savings(event.transaction_id)
"Rendered template #{identifier}"
end
end
def render_collection(event)
identifier = pathname(event.payload[:identifier])
return unless identifier
count = event.payload[:count]
cache_hits = event.payload[:cache_hits] || 0
logger.debug do
pop_partial_savings(event.transaction_id)
"Rendered collection #{identifier} (#{count} times, #{cache_hits} cached)"
end
end
def render_layout(event)
identifier = pathname(event.payload[:identifier])
return unless identifier
logger.debug do
pop_partial_savings(event.transaction_id)
"Rendered layout #{identifier}"
end
end
private
def pop_partial_savings(transaction_id)
partial_savings = @partials.delete(transaction_id)
partial_savings.each do |partial, origins|
sum_count = origins.values.reduce(:+)
sum_count_info = " (#{sum_count} times in total)" if sum_count > 1
logger.debug("Rendered partial #{partial}#{sum_count_info}")
origins.each do |origin, count|
count_info = colorize("(#{count} times)", TEXT_GRAY_400) if count > 1
logger.debug("#{Semantic::Helper.stackisize(origin, symbol: '⇤')}#{count_info}")
end
end
end
def pathname(location)
m = REGEX_BASEDIR.match(location)
m[1] if m
end
end
end
end