Class: Tube::Line

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

Overview

Models the data gathered on a tube line from the tfl.gov.uk “Live travel news” page.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(id, status, problem = false, message = nil, name = nil) ⇒ Line

:call-seq: Line.new(id, status, problem=false, message=nil, name=nil)

Create a new Line. If name is ommited it will be set to id.



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# File 'lib/line.rb', line 15

def initialize( id, status, problem=false, message=nil, name=nil )
  @id = id
  @status = status
  @problem = problem
  @message = message
  @name = name || @id
end

Instance Attribute Details

#id ⇒ Object (readonly)

Returns the value of attribute id.



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# File 'lib/line.rb', line 7

def id
  @id
end

#message ⇒ Object

Returns the value of attribute message.



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

def message
  @message
end

#name ⇒ Object

Returns the value of attribute name.



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

def name
  @name
end

#problem ⇒ Object Also known as: problem?

Returns the value of attribute problem.



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

def problem
  @problem
end

#status ⇒ Object

Returns the value of attribute status.



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

def status
  @status
end

Instance Method Details

#to_hash ⇒ Object

:call-seq: line.to_hash -> hash

Returns a hash representation of the object.

{"id" => "central", "status" => "Good service", "problem" => false,
"message" => nil, "name" => "Central"}



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# File 'lib/line.rb', line 30

def to_hash
  instance_variables.inject( {} ) do |memo, var|
    memo.merge( {var[1..-1] => instance_variable_get( var )} )
  end
end

#to_json(*args) ⇒ Object

:call-seq: line.to_json -> string

Returns a string of JSON representing the object.

'{"id":"central", "status":"Good service", "problem":false,
"message":null, "name":"Central"}'



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# File 'lib/line.rb', line 42

def to_json( *args )
  to_hash.to_json( *args )
end

#to_xml(as_string = true) ⇒ Object

:call-seq: line.to_xml -> string line.to_xml(false) -> rexml_document.

Returns a string of XML representing the object.

<line>
  <id>central</id>
  <status>Good service</status>
  <problem>false</problem>
  <message/>
  <name>Central</name>
</line>

Alternately pass false as the only argument to get an instance of REXML::Document.



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# File 'lib/line.rb', line 61

def to_xml( as_string=true )
  doc = REXML::Document.new
  root = doc.add_element( "line" )
  instance_variables.each do |var|
    el = root.add_element( var[1..-1] )
    el.add_text( instance_variable_get( var ).to_s )
  end
  if as_string then doc.to_s else doc end
end