Class: Bogo::Stack::Hooks

Inherits:
Object
  • Object
show all
Includes:
MonitorMixin
Defined in:
lib/bogo/stack.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(stack:) ⇒ self

Create a new set hooks



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# File 'lib/bogo/stack.rb', line 25

def initialize(stack:)
  super()
  if !stack.is_a?(Stack)
    raise TypeError,
      "Expecting `#{Stack.name}` but received `#{stack.class.name}`"
  end
  @prepend_entries = [].freeze
  @append_entries = [].freeze
  @after_entries = [].freeze
  @before_entries = [].freeze
  @applied = false
  @stack = stack
end

Instance Attribute Details

#after_entries ⇒ Array<Entry> (readonly) 



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# File 'lib/bogo/stack.rb', line 16

def after_entries
  @after_entries
end

#append_entries ⇒ Array<Entry> (readonly) 



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# File 'lib/bogo/stack.rb', line 12

def append_entries
  @append_entries
end

#before_entries ⇒ Array<Entry> (readonly) 



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# File 'lib/bogo/stack.rb', line 14

def before_entries
  @before_entries
end

#prepend_entries ⇒ Array<Entry> (readonly) 



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# File 'lib/bogo/stack.rb', line 10

def prepend_entries
  @prepend_entries
end

#stack ⇒ Stack (readonly) 



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# File 'lib/bogo/stack.rb', line 19

def stack
  @stack
end

Instance Method Details

#after(identifier, &block) ⇒ self

Add hook after identifier



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# File 'lib/bogo/stack.rb', line 44

def after(identifier, &block)
  be_callable!(identifier) unless identifier.is_a?(Symbol)
  be_callable!(block)
  synchronize do
    if applied?
      raise Error::ApplyError,
        "Hooks have already been applied to stack"
    end
    @after_entries = after_entries +
      [Entry.new(identifier: identifier,
      action: Action.new(stack: stack, callable: block))]
    @after_entries.freeze
  end
  self
end

#append(&block) ⇒ self

Add hook after stack actions



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# File 'lib/bogo/stack.rb', line 103

def append(&block)
  be_callable!(block)
  synchronize do
    if applied?
      raise Error::ApplyError,
        "Hooks have already been applied to stack"
    end
    @append_entries = append_entries +
      [Action.new(stack: stack, callable: block)]
    @append_entries.freeze
  end
  self
end

#applied? ⇒ Boolean 



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# File 'lib/bogo/stack.rb', line 118

def applied?
  !!@applied
end

#apply! ⇒ Array<Action>

Apply hooks to stack action list



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# File 'lib/bogo/stack.rb', line 125

def apply!
  synchronize do
    if applied?
      raise Error::ApplyError,
        "Hooks have already been applied to stack"
    end
    actions = stack.actions.dup
    stubs = [:stub] * actions.size
    before_entries.find_all { |e| e.identifier == :all }.each do |entry|
      stubs.count.times.to_a.reverse.each do |i|
        stubs.insert(i, entry.action)
      end
    end
    after_entries.find_all { |e| e.identifier == :all }.each do |entry|
      stubs.count.times.to_a.reverse.each do |i|
        stubs.insert(i + 1, entry.action)
      end
    end
    actions = stubs.map do |item|
      item == :stub ? actions.pop : item
    end
    before_entries.find_all { |e| e.identifier != :all }.each do |entry|
      idx = actions.index { |a| a.callable == entry.identifier }
      next if idx.nil?
      actions.insert(idx, entry.action)
    end
    after_entries.find_all { |e| e.identifier != :all }.each do |entry|
      idx = actions.index { |a| a.callable == entry.identifier }
      next if idx.nil?
      actions.insert(idx + 1, entry.action)
    end
    @applied = true
    actions = prepend_entries + actions + append_entries
  end
end

#before(identifier, &block) ⇒ self

Add hook before identifier



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# File 'lib/bogo/stack.rb', line 65

def before(identifier, &block)
  be_callable!(identifier) unless identifier.is_a?(Symbol)
  be_callable!(block)
  synchronize do
    if applied?
      raise Error::ApplyError,
        "Hooks have already been applied to stack"
    end
    @before_entries = before_entries +
      [Entry.new(identifier: identifier,
      action: Action.new(stack: stack, callable: block))]
    @before_entries.freeze
  end
  self
end

#prepend(&block) ⇒ self

Add hook before stack actions



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# File 'lib/bogo/stack.rb', line 85

def prepend(&block)
  be_callable!(block)
  synchronize do
    if applied?
      raise Error::ApplyError,
        "Hooks have already been applied to stack"
    end
    @prepend_entries = prepend_entries +
      [Action.new(stack: stack, callable: block)]
    @prepend_entries.freeze
  end
  self
end