Class: Letteropend::List

Inherits:
Object
  • Object
show all
Defined in:
lib/letteropend/list.rb

Overview

The List class

Constant Summary collapse

@@valid_events = 
[:new_page, :new_film]

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(username, list = "films", &events) ⇒ List

Created a new list instance

Parameters:

  • username —

    • the username for the list

  • list (defaults to: "films") —

    • name of list, defaults to “films” (watched movies)

  • events —

    • block of user defined events



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# File 'lib/letteropend/list.rb', line 16

def initialize(username, list="films", &events) 
  @username = username
  @list = list
  
  @films = []
  @pages = ["/#{username}/#{list}/page/1/"]

  # assign events to list object
  if block_given?
    instance_eval(&events)
  end

  begin
    # get page using Nokogiri
    new_page

    page = Nokogiri::HTML(open("http://www.letterboxd.com#{@pages.last}"))
  
    # append visible films to @films
    page.css(".poster").each do |film|
      title = film.css(".frame-title").text
      url_full = film.css("a")[0].attr("href")
      url = /\/film\/(\S+)\//.match(url_full).captures[0]
      @films.push( Film.new(url, title: title) )
      new_film
    end
  
    # see if there is a next page
    next_page = page.css('a.paginate-next')[0]
    if ( next_page )
      @pages.push( next_page.attr("href") )
    end
  end while ( next_page )
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(sym, *args) ⇒ Object 



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# File 'lib/letteropend/list.rb', line 88

def method_missing(sym, *args)
  if (@@valid_events.include? sym)
    # no method was defined for this event
  else
    super
  end
end

Instance Attribute Details

#films ⇒ Object (readonly)

Returns the value of attribute films.



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# File 'lib/letteropend/list.rb', line 8

def films
  @films
end

#list ⇒ Object (readonly)

Returns the value of attribute list.



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# File 'lib/letteropend/list.rb', line 8

def list
  @list
end

#pages ⇒ Object (readonly)

Returns the value of attribute pages.



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# File 'lib/letteropend/list.rb', line 8

def pages
  @pages
end

#username ⇒ Object (readonly)

Returns the value of attribute username.



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# File 'lib/letteropend/list.rb', line 8

def username
  @username
end

Class Method Details

.config(&events) ⇒ Object

Method to declare class events

Parameters:

  • events —

    • block of user defined events



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# File 'lib/letteropend/list.rb', line 68

def self.config(&events)
  if block_given?
    class_eval(&events)
  end
end

.on(event, &block) ⇒ Object

Assign events to class

Parameters:

  • event —

    • symbol of event to be triggered

  • block —

    • user defined function to be triggered on event



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# File 'lib/letteropend/list.rb', line 78

def self.on(event, &block)
  if block_given?
    if (@@valid_events.include? event)
      define_method(event, block)
    else
      puts "Error: trying to assign invalid class event | Letteropend::List, event: #{event}"
    end
  end
end

Instance Method Details

#on(event, &block) ⇒ Object

Assign events to instance

Parameters:

  • event —

    • symbol of event to be triggered

  • block —

    • user defined function to be triggered on event



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# File 'lib/letteropend/list.rb', line 55

def on(event, &block)
  if block_given?
    if (@@valid_events.include? event)
      define_singleton_method(event, block)
    else
      puts "Error: trying to assign invalid event | Letteropend::List, event: #{event}"
    end
  end
end