### Home Classes Methods

### In Files

- lib/ramaze/helper/stack.rb

### Methods

- #answer
- #call
- #inside_stack?
- #push

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No matching classes.

# Ramaze::Helper::Stack

Provides an call/answer mechanism, this is useful for example in a login-system.

It is basically good to redirect temporarly somewhere else without forgetting where you come from and offering a nice way to get back to the last urls.

Example:

class AuthController < Controller

    helper :stack

    def login pass
      if pass == 'password'
        session[:logged_in] = true
        answer '/'
      else
        "failed"
      end
    end

    def logged_in?
      !!session[:logged_in]
    end

end

class ImportantController < Controller

    helper :stack

    def secret_information
      call :login unless logged_in?
      "Agent X is assigned to fight the RubyNinjas"
    end

end

### Public Instance Methods

answer(alternative = nil) click to toggle source

return to the last location on session The optional alternative paramter will be used to redirect in case you are not inside_stack? If the session has no stack and no alternative is given this won't do anything

    # File lib/ramaze/helper/stack.rb, line 61
    def answer(alternative = nil)
      if inside_stack?
        stack = session[:STACK]
        target = stack.pop
        session.delete(:STACK) if stack.empty?
        redirect(target)
      elsif alternative
        redirect(alternative)
      end
    end

call(this) click to toggle source

    # File lib/ramaze/helper/stack.rb, line 49
    def call(this)
      push(request.fullpath)
      redirect(this)
    end

inside_stack?() click to toggle source

check if the stack has something inside.

    # File lib/ramaze/helper/stack.rb, line 73
    def inside_stack?
      session[:STACK] and session[:STACK].any?
    end

push(frame) click to toggle source

redirect to another location and pushing the current location on the session

    # File lib/ramaze/helper/stack.rb, line 45
    def push(frame)
      (session[:STACK] ||= []) << frame
    end

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