Class: Alien::AlienTagList

Inherits:
Array
  • Object
show all
Defined in:
lib/alien/alientaglist.rb

Instance Method Summary collapse

Constructor Details

#initialize(taglist_string = "") ⇒ AlienTagList

Returns a new instance of AlienTagList.



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# File 'lib/alien/alientaglist.rb', line 17

def initialize(taglist_string="")
  super()
  string_to_taglist(taglist_string) if taglist_string != ""
end

Instance Method Details

#add_tag(t) ⇒ Object

Adds an AlienTag to the list.



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# File 'lib/alien/alientaglist.rb', line 37

def add_tag(t)
  self.push(t)
  return self
end

#filter(filter) ⇒ Object

A little regular expression scanner. Looks at the list of tags and returns a new taglist containing those tag IDs that match a regular expression filter.



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# File 'lib/alien/alientaglist.rb', line 44

def filter(filter)
  tl = AlienTagList.new

  self.each do |ele|
    if ele.tag =~ filter
      tl.add_tag(ele)
    end
  end

  return tl
end

#filter!(filter) ⇒ Object

A self-modifying version of filter_taglist. Excercise caution. Elements in the taglist array that do not match the regular expression are deleted.



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# File 'lib/alien/alientaglist.rb', line 59

def filter!(filter)
  self.delete_if { |ele| !(ele.tag =~ filter)}
  return self
end

#string_to_taglist(taglist_string) ⇒ Object

Takes a taglist string from a reader and appends it to the array.



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# File 'lib/alien/alientaglist.rb', line 24

def string_to_taglist(taglist_string)
  lines = taglist_string.split("\r\n")

  lines.each do |line|
    if line != "(No Tags)"
      add_tag(AlienTag.new(line))
    end
  end

  return self
end