Class: FunWith::Files::Utils::Timestamp

Inherits:
Object
  • Object
show all
Defined in:
lib/fun_with/files/utils/timestamp.rb

Class Method Summary collapse

Class Method Details

.format(key) ⇒ Object

Currently exactly one format is supported. Laaaaame!



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# File 'lib/fun_with/files/utils/timestamp.rb', line 7

def self.format( key )
  @formats ||= {
    :default => TimestampFormat.new.recognizer( /^\d{17}$/ ).strftime("%Y%m%d%H%M%S%L"),
    :ymd     => TimestampFormat.new.recognizer( /^\d{4}-\d{2}-\d{2}$/ ).strftime("%Y-%m-%d"),
    :ym      => TimestampFormat.new.recognizer( /^\d{4}-\d{2}$/ ).strftime("%Y-%m"),
    :y       => TimestampFormat.new.recognizer( /^\d{4}$/ ).strftime("%Y"),
    
    # UNIX timestamp
    :s       => TimestampFormat.new.recognizer( /^\d{10}$/ ).strftime("%s")
  }
  
  if @formats.has_key?(key)
    @formats[key]
  else
    raise Errors::TimestampFormatUnrecognized.new( "Unrecognized timestamp format (#{key.inspect}).  Choose from #{@formats.keys.inspect}" )
  end
end

.timestamp(basename, format: :default, splitter: ".", time: Time.now) ⇒ Object 



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# File 'lib/fun_with/files/utils/timestamp.rb', line 25

def self.timestamp( basename, format: :default, splitter: ".", time: Time.now )
  filename_chunks = basename.to_s.split( splitter )
  format = format.is_a?( TimestampFormat ) ? format : self.format( format )
  new_timestamp = format.format_time( time )
  
  timestamp_index = filename_chunks.map.each_with_index{ |str,i| 
    format.matches?( str ) ? i : nil
  }.compact.last
  
  if timestamp_index
    filename_chunks[timestamp_index] = new_timestamp
  elsif filename_chunks.length == 1
    filename_chunks << new_timestamp
  else
    filename_chunks.insert( -2, new_timestamp )
  end
  
  filename_chunks.join( splitter )
end