class Circuitry::Middleware::Chain

Public Class Methods

new() { |self| ... } click to toggle source
# File lib/circuitry/middleware/chain.rb, line 8
def initialize
  yield self if block_given?
end

Public Instance Methods

add(klass, *args) click to toggle source
# File lib/circuitry/middleware/chain.rb, line 20
def add(klass, *args)
  remove(klass) if exists?(klass)
  entries << Entry.new(klass, *args)
end
build() click to toggle source
# File lib/circuitry/middleware/chain.rb, line 50
def build
  map(&:build)
end
clear() click to toggle source
# File lib/circuitry/middleware/chain.rb, line 54
def clear
  entries.clear
end
each(&block) click to toggle source
# File lib/circuitry/middleware/chain.rb, line 12
def each(&block)
  entries.each(&block)
end
entries() click to toggle source
# File lib/circuitry/middleware/chain.rb, line 16
def entries
  @entries ||= []
end
exists?(klass) click to toggle source
# File lib/circuitry/middleware/chain.rb, line 46
def exists?(klass)
  any? { |entry| entry.klass == klass }
end
insert_after(old_klass, new_klass, *args) click to toggle source
# File lib/circuitry/middleware/chain.rb, line 40
def insert_after(old_klass, new_klass, *args)
  new_entry = build_or_replace_entry(new_klass, *args)
  i = entries.index { |entry| entry.klass == old_klass } || entries.size - 1
  entries.insert(i + 1, new_entry)
end
insert_before(old_klass, new_klass, *args) click to toggle source
# File lib/circuitry/middleware/chain.rb, line 34
def insert_before(old_klass, new_klass, *args)
  new_entry = build_or_replace_entry(new_klass, *args)
  i = entries.index { |entry| entry.klass == old_klass } || 0
  entries.insert(i, new_entry)
end
invoke(*args) { || ... } click to toggle source
# File lib/circuitry/middleware/chain.rb, line 58
def invoke(*args)
  chain = build.dup

  traverse_chain = lambda do
    if chain.empty?
      yield
    else
      chain.shift.call(*args, &traverse_chain)
    end
  end

  traverse_chain.call
end
prepend(klass, *args) click to toggle source
# File lib/circuitry/middleware/chain.rb, line 29
def prepend(klass, *args)
  remove(klass) if exists?(klass)
  entries.unshift(Entry.new(klass, *args))
end
remove(klass) click to toggle source
# File lib/circuitry/middleware/chain.rb, line 25
def remove(klass)
  entries.delete_if { |entry| entry.klass == klass }
end

Private Instance Methods

build_or_replace_entry(klass, *args) click to toggle source
# File lib/circuitry/middleware/chain.rb, line 74
def build_or_replace_entry(klass, *args)
  i = entries.index { |entry| entry.klass == klass }
  entry = i.nil? ? Entry.new(klass, *args) : entries.delete_at(i)

  if entry.args == args
    entry
  else
    Entry.new(klass, *args)
  end
end