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Contents
module Jets::Cfn::Builders
class PageBuilder
extend Memoist
cattr_reader :pages
# Build page slices
def build
map = build_map
pages = []
map.each do |path, existing_page|
if existing_page
pages[existing_page] ||= []
pages[existing_page] << path
end
end
# Remove existing paths from map. Leave behind new paths
pages.each do |page|
page.each do |i|
map.delete(i)
end
end
# Fill up available space in each page so all existing pages are full
keys = map.keys
pages.each do |page|
break if keys.empty?
while page.size < page_limit
path = keys.shift
break if path.nil?
page << path
end
end
# Add remaining slices to new additional pages
pages += keys.each_slice(page_limit).to_a
@@pages = pages
pages
end
# Build map that has paths as keys and page number as value
# Example: {"a1"=>0, "a2"=>0, "b1"=>1, "b2"=>1, "c1"=>2, "c2"=>2}
def build_map
map = {}
new_paths.each do |path|
map[path] = find_page_index(path)
end
map
end
def find_page_index(new_path)
pages = old_pages || []
pages.each_with_index do |slice, i|
slice.find do |old_path|
return i if old_path == new_path
end
end
nil
end
def old_pages
state = Jets::Router::State.new
state.load("pages")
end
memoize :old_pages
def new_paths
Jets::Router.all_paths.reject { |p| p == '' }
end
# Relevant is CloudFormation Outputs limit is 200
# JETS_APIGW_PAGE_LIMIT is based on that
# https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/cloudformation-limits.html
def page_limit
Integer(ENV['JETS_APIGW_PAGE_LIMIT'] || 200)
end
end
end
Version data entries
16 entries across 16 versions & 1 rubygems