Class: Lyrics

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

Defined Under Namespace

Classes: FetchPageData, Request, Response, Suggestion

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(cleanup_lyrics = true, logger = nil) ⇒ Lyrics

Returns a new instance of Lyrics.



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# File 'lib/wiki_lyrics/lyrics.rb', line 209

def initialize( cleanup_lyrics=true, logger=nil )
	super()
	@cleanup_lyrics = cleanup_lyrics
	@logger = logger
	@tabulation = nil
	@skip_tabulation = false
end

Instance Attribute Details

#cleanup_lyrics ⇒ Object

Returns the value of attribute cleanup_lyrics.



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# File 'lib/wiki_lyrics/lyrics.rb', line 206

def cleanup_lyrics
  @cleanup_lyrics
end

Class Method Details

.build_google_feeling_lucky_url(artist, title = nil) ⇒ Object

default implementation, overide if there is a more accurate expression for a specific site



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# File 'lib/wiki_lyrics/lyrics.rb', line 520

def Lyrics.build_google_feeling_lucky_url( artist, title=nil )
	query = Strings.google_search_quote( artist )
	query << " " << Strings.google_search_quote( title ) if title
	query << " lyrics"
	return Strings.build_google_feeling_lucky_url( query, self.site_host() )
end

.build_song_add_url(request) ⇒ Object 



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# File 'lib/wiki_lyrics/lyrics.rb', line 249

def Lyrics.build_song_add_url( request )
	return nil
end

.known_url?(url) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/wiki_lyrics/lyrics.rb', line 257

def Lyrics.known_url?( url )
	return url.index( "http://#{site_host}" ) == 0
end

.lyrics_test_data ⇒ Object

NOTE: if possible use popular song that are likely to be indexed by google. We are not testing here how good or complete a site is but if the site plugin is behaving as expected. We part from the assumption that every plugin should be able to get lyrics and suggestions for the values returned here.



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# File 'lib/wiki_lyrics/lyrics.rb', line 535

def Lyrics.lyrics_test_data()
	return [
		Request.new( "Nirvana", "Smells Like Teen Spirit", "Nevermind" ),
		Request.new( "Radiohead", "Optimistic", "Kid A" ),
		Request.new( "Massive Attack", "Protection", "Protection" ),
		Request.new( "Pearl Jam", "Porch", "Ten" ),
# 			Request.new( "The Cranberries", "Linger", "Everybody Else Is Doing It, So Why Can't We?" ),
# 			Request.new( "Radiohead", "Idioteque", "Kid A" ),
# 			Request.new( "Radiohead", "How To Disappear Completely","stitle"=>"How To Dissapear", "Kid A" ),
# 			Request.new( "Pearl Jam", "Love Boat Captain", "Riot Act" ),
# 			Request.new( "Blur", "No Distance Left To Run", "13" ),
# 			Request.new( "Opeth", "Hope Leaves", "Damnation" ),
# 			Request.new( "Megadeth", "À tout le monde", "Youthanasia" ),
# 			Request.new( "Metallica", "Master of Puppets", "Master of Puppets" ),
# 			Request.new( "Lacuna Coil", "Heaven's a Lie", "Comalies" ),
# 			Request.new( "Pearl Jam", "Porch", "Ten" ),
# 			Request.new( "Portishead", "Wandering Star", "Dummy" ),
	]
end

.suggestions_test_data ⇒ Object 



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# File 'lib/wiki_lyrics/lyrics.rb', line 559

def Lyrics.suggestions_test_data()
	return lyrics_test_data()
end

Instance Method Details

#build_google_feeling_lucky_url(artist, title = nil) ⇒ Object 



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# File 'lib/wiki_lyrics/lyrics.rb', line 527

def build_google_feeling_lucky_url( artist, title=nil )
	return self.class.build_google_feeling_lucky_url( artist, title )
end

#build_lyrics_fetch_data(request) ⇒ Object

Returns a FetchPageData instance



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# File 'lib/wiki_lyrics/lyrics.rb', line 270

def build_lyrics_fetch_data( request )
	return FetchPageData.new( nil )
end

#build_song_add_url(request) ⇒ Object 



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# File 'lib/wiki_lyrics/lyrics.rb', line 253

def build_song_add_url( request )
	return self.class.build_song_add_url( request )
end

#build_suggestions_fetch_data(request) ⇒ Object

Returns a FetchPageData instance



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# File 'lib/wiki_lyrics/lyrics.rb', line 380

def build_suggestions_fetch_data( request )
	return FetchPageData.new( nil )
end

#decrease_tabulation_level ⇒ Object 



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# File 'lib/wiki_lyrics/lyrics.rb', line 237

def decrease_tabulation_level()
	@logger.decrease_tabulation_level() if @logger
end

#fetch_lyrics_page(fetch_data) ⇒ Object

Returns the lyrics page body (or nil if it couldn’t be retrieved) and the corresponding url (or nil)



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# File 'lib/wiki_lyrics/lyrics.rb', line 275

def fetch_lyrics_page( fetch_data )

	return nil, nil if ! fetch_data.url

	log( "Fetching lyrics page... ", 0 )
	if fetch_data.post_data
		response, url = HTTP.fetch_page_post( fetch_data.url, fetch_data.post_data, fetch_data.headers_data )
	else
		response, url = HTTP.fetch_page_get( fetch_data.url, fetch_data.headers_data )
	end

	if response && response.body()
		log( "OK" )
		log( response.body(), 2 ) if verbose_log?
		return response.body(), url
	else
		log( "ERROR" )
		return nil, url
	end

end

#fetch_suggestions_page(fetch_data) ⇒ Object

Returns the lyrics page body (nil if it couldn’t be retrieved) and the response url



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# File 'lib/wiki_lyrics/lyrics.rb', line 385

def fetch_suggestions_page( fetch_data )

	return nil, nil if ! fetch_data.url

	log( fetch_data.to_s() + "\nFetching suggestions page... ", 0 )

	if fetch_data.post_data
		response, url = HTTP.fetch_page_post( fetch_data.url, fetch_data.post_data, fetch_data.headers_data )
	else
		response, url = HTTP.fetch_page_get( fetch_data.url, fetch_data.headers_data )
	end

	if response && response.body()
		log( "OK" )
		log( response.body(), 2 ) if verbose_log?
		return response.body(), url
	else
		log( "ERROR" )
		return nil, url
	end

end

#increase_tabulation_level ⇒ Object 



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# File 'lib/wiki_lyrics/lyrics.rb', line 233

def increase_tabulation_level()
	@logger.increase_tabulation_level() if @logger
end

#known_url?(url) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/wiki_lyrics/lyrics.rb', line 261

def known_url?( url )
	return self.class.known_url?( url )
end

#log(message, new_lines = 1) ⇒ Object 



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# File 'lib/wiki_lyrics/lyrics.rb', line 229

def log( message, new_lines=1 )
	@logger.log( message, new_lines ) if @logger
end

#log? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/wiki_lyrics/lyrics.rb', line 217

def log?()
	return @logger != nil
end

#logger=(logger) ⇒ Object 



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# File 'lib/wiki_lyrics/lyrics.rb', line 225

def logger=( logger )
	@logger = logger
end

#lyrics_direct_search(request) ⇒ Object

Returns a Lyrics::Response object



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# File 'lib/wiki_lyrics/lyrics.rb', line 310

def lyrics_direct_search( request )

	fetch_data = build_lyrics_fetch_data( request )

	log(
		site_name().upcase() + "\n" +
		"Attempting LYRICS DIRECT SEARCH...\n" +
		request.to_s() + "\n" +
		fetch_data.to_s()
	)

	page_body, page_url = fetch_lyrics_page( fetch_data )

	response = Response.new( request )

	if page_body
		if lyrics_page_valid?( request, page_body, page_url )
			log( "Parsing lyrics... ", 0 )
			response.url = page_url
			parse_lyrics( response, page_body )
			log( response.lyrics ? "LYRICS FOUND" : "LYRICS NOT FOUND" )
			log( response.to_s() )
			log( " - parsed lyrics:\n[#{lyrics_data.lyrics}" ) if verbose_log?
			response.lyrics = Strings.cleanup_lyrics( response.lyrics ) if response.lyrics && @cleanup_lyrics
		else
			log( "LYRICS PAGE IS INVALID" )
		end
	end

	return response

end

#lyrics_from_suggestions(request, suggestions = nil) ⇒ Object 



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# File 'lib/wiki_lyrics/lyrics.rb', line 478

def lyrics_from_suggestions( request, suggestions=nil )

	log( site_name().upcase() + "\nSearching LYRICS FROM SUGGESTIONS..." )

	suggestions = suggestions( request ) if suggestions == nil

	normalized_artist, normalized_title = Strings.normalize( request.artist ), Strings.normalize( request.title )

	log( "Scanning suggestions... ", 0 )
	suggestions.each() do |suggestion|
		next if ! suggestion.is_a?( Suggestion )
		if Strings.normalize( suggestion.artist ) == normalized_artist &&
		   Strings.normalize( suggestion.title ) == normalized_title
			log( "MATCH FOUND\n" + suggestion.to_s() )
			# TODO should we use request.album and request.year here?
			response = lyrics_from_url(
				Request.new( suggestion.artist, suggestion.title, request.album, request.year ),
				suggestion.url
			)
			return response, suggestions if response.lyrics
		end
	end

	log( "NO VALID MATCH FOUND" )

	return Response.new( request ), suggestions

end

#lyrics_from_url(request, url) ⇒ Object

Returns a Lyrics::Response object



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# File 'lib/wiki_lyrics/lyrics.rb', line 344

def lyrics_from_url( request, url )

	response = Response.new( request )

	if ! known_url?( url )
		log( site_name().upcase() + "\nCan't handle received URL: " + url )
		return response
	end

	fetch_data = build_lyrics_fetch_data( request )
	fetch_data = FetchPageData.new( url, fetch_data.post_data, fetch_data.headers_data )

	log(
		site_name().upcase() + "\n" +
		"Retrieving LYRICS FROM URL...\n" +
		request.to_s() + "\n" +
		fetch_data.to_s()
	)

	page_body, url = fetch_lyrics_page( fetch_data )

	if page_body
		log( "Parsing lyrics... ", 0 )
		response.url = url
		parse_lyrics( response, page_body )
		log( response.lyrics ? "LYRICS FOUND" : "LYRICS NOT FOUND" )
		log( response.to_s() )
		log( " - parsed lyrics:\n[#{lyrics_data.lyrics}]" ) if verbose_log?
		response.lyrics = Strings.cleanup_lyrics( response.lyrics ) if response.lyrics && @cleanup_lyrics
	end

	return response

end

#lyrics_full_search(request) ⇒ Object

Returns a Lyrics::Response object



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# File 'lib/wiki_lyrics/lyrics.rb', line 508

def lyrics_full_search( request )

	# LYRICS DIRECT SEARCH:
	response = lyrics_direct_search( request )
	return response if response.lyrics

	# NOT FOUND, SEARCH IN SUGGESTIONS:
	response, suggs = lyrics_from_suggestions( request, suggestions( request ) )
	return response
end

#lyrics_page_valid?(request, page_body, page_url) ⇒ Boolean

NOTE: override for example if your using google feeling lucky to verify that the resulting page is not just some random (trashy) result. Returns false is page_body does not correspond to the requested lyrics

Returns:

  • (Boolean) 


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# File 'lib/wiki_lyrics/lyrics.rb', line 300

def lyrics_page_valid?( request, page_body, page_url )
	return true
end

#lyrics_test_data ⇒ Object 



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# File 'lib/wiki_lyrics/lyrics.rb', line 555

def lyrics_test_data()
	return self.class.lyrics_test_data()
end

#notify(message) ⇒ Object 



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# File 'lib/wiki_lyrics/lyrics.rb', line 265

def notify( message )
	puts "#{site_name()}: #{message}"
end

#site_host ⇒ Object 



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# File 'lib/wiki_lyrics/lyrics.rb', line 241

def site_host()
	return self.class.site_host()
end

#site_name ⇒ Object 



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# File 'lib/wiki_lyrics/lyrics.rb', line 245

def site_name()
	return self.class.site_name()
end

#suggestions(request) ⇒ Object

Returns an array of maps { url, artist, title }



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# File 'lib/wiki_lyrics/lyrics.rb', line 422

def suggestions( request )

	log( site_name().upcase() + "\nRetrieving SUGGESTIONS...\n" + request.to_s() )

	fetch_data = build_suggestions_fetch_data( request )
	suggestions = []

	suggestions_rec( request, fetch_data, suggestions, 0 )

	return suggestions

end

#suggestions_page_valid?(request, page_body, page_url) ⇒ Boolean

NOTE: override for example if your using google feeling lucky to verify that the resulting page is not just some random (trashy) result. Returns false is body does not correspond to the required suggestions page

Returns:

  • (Boolean) 


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# File 'lib/wiki_lyrics/lyrics.rb', line 411

def suggestions_page_valid?( request, page_body, page_url )
	return true
end

#suggestions_test_data ⇒ Object 



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# File 'lib/wiki_lyrics/lyrics.rb', line 563

def suggestions_test_data()
	return self.class.suggestions_test_data()
end

#verbose_log? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/wiki_lyrics/lyrics.rb', line 221

def verbose_log?()
	return log? && $VERBOSE_LOG
end