Class: Sequencer::Sequence

Inherits:
Object
  • Object
show all
Includes:
Comparable, Enumerable
Defined in:
lib/sequencer.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(directory, filenames) ⇒ Sequence

Returns a new instance of Sequence.



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# File 'lib/sequencer.rb', line 118

def initialize(directory, filenames)
  raise "Cannot create a Sequence with no files" if filenames.empty?
  @directory, @filenames = directory, natural_sort(filenames)
  @directory.freeze
  @filenames.freeze
  detect_gaps!
  detect_pattern!
end

Instance Attribute Details

#directory ⇒ Object (readonly)

Returns the value of attribute directory.



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# File 'lib/sequencer.rb', line 116

def directory
  @directory
end

#pattern ⇒ Object (readonly)

Returns the value of attribute pattern.



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# File 'lib/sequencer.rb', line 115

def pattern
  @pattern
end

Instance Method Details

#<=>(another) ⇒ Object 



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# File 'lib/sequencer.rb', line 283

def <=>(another)
  to_paths <=> another.to_paths
end

#bulk_rename(with_pattern, into_directory = nil, &operation) ⇒ Object

Apply a bulk rename



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# File 'lib/sequencer.rb', line 235

def bulk_rename(with_pattern, into_directory = nil, &operation)
  # Check if the pattern includes a number. If it doesnt, add one and the
  # extension
  unless with_pattern.include?("%")
    padz = last_frame_no.to_s.length
    with_pattern = [with_pattern, ".%0#{padz}d", File.extname(pattern)].join
  end
  
  rename_map = @filenames.inject({}) do | map, filename |
    frame_no = filename.scan(NUMBERS_AT_END).flatten.shift.to_i
    
    map.merge(filename => (with_pattern % frame_no))
  end
  
  destination = into_directory || directory
  
  # Ensure it's there
  if (!File.exist?(destination))
    raise "The destination #{destination} does not exist"
  end
  
  # Ensure it's a dir
  if (!File.directory?(destination))
    raise "The destination #{destination} is not a directory"
  end
  
  # Ensure we will not produce dupes
  if (rename_map.values.uniq.length != rename_map.length)
    raise "This would would produce non-unique files"
  end
  
  if (error = (rename_map.keys & rename_map.values)).any?
    raise "This would overwrite old files with the renamed ones (#{error[0..1]}.join(',')..)"
  end
  
  if (error = (Dir.entries(destination) & rename_map.values)).any?
    raise "Files that will be created by the rename are already in place (#{error[0..1]}.join(',')..)"
  end
  
  rename_map.each_pair do | from_path, to_path |
    src, dest = File.join(directory, from_path), File.join(destination, to_path)
    File.rename(src, dest)
    #yield(src, dest)
  end
  
  self.class.new(destination, rename_map.values)
end

#each ⇒ Object

Yields the filename of each file to the block



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# File 'lib/sequencer.rb', line 205

def each
  @filenames.each {|f| yield(f) }
end

#each_path ⇒ Object

Yield each absolute path to a file in the sequence to the block



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# File 'lib/sequencer.rb', line 210

def each_path
  @filenames.each{|f| yield(File.join(@directory, f))}
end

#expected_frames ⇒ Object 



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# File 'lib/sequencer.rb', line 176

def expected_frames
  @expected_frames ||= ((@ranges[-1].end - @ranges[0].begin) + 1)
end

#file_count ⇒ Object Also known as: length

Returns the actual file count in the sequence



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# File 'lib/sequencer.rb', line 194

def file_count
  @file_count ||= @filenames.length
end

#first_frame_no ⇒ Object

Returns the number of the first frame in the sequence



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# File 'lib/sequencer.rb', line 225

def first_frame_no
  @ranges[0].begin
end

#gap_count ⇒ Object 



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# File 'lib/sequencer.rb', line 180

def gap_count
  @ranges.length - 1
end

#gaps? ⇒ Boolean

Returns true if this sequence has gaps

Returns:

  • (Boolean) 


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# File 'lib/sequencer.rb', line 133

def gaps?
  @ranges.length > 1
end

#include?(base_filename) ⇒ Boolean

Check if this sequencer includes a file

Returns:

  • (Boolean) 


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# File 'lib/sequencer.rb', line 200

def include?(base_filename)
  @filenames.include?(base_filename)
end

#inspect ⇒ Object 



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# File 'lib/sequencer.rb', line 142

def inspect
  '#<%s>' % to_s
end

#last_frame_no ⇒ Object

Returns the number of the last frame in the sequence



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# File 'lib/sequencer.rb', line 230

def last_frame_no
  @ranges[-1].end
end

#missing_frames ⇒ Object

Returns the number of frames that the sequence should contain to be continuous



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# File 'lib/sequencer.rb', line 189

def missing_frames
  expected_frames - file_count
end

#numbered? ⇒ Boolean

Returns true if the files in the sequence can have numbers

Returns:

  • (Boolean) 


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# File 'lib/sequencer.rb', line 128

def numbered?
  @numbered ||= !!(@filenames[0] =~ NUMBERS_AT_END)
end

#segment_count ⇒ Object 



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# File 'lib/sequencer.rb', line 184

def segment_count
  @ranges.length
end

#single_file? ⇒ Boolean

Tells whether this is a single frame sequence

Returns:

  • (Boolean) 


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# File 'lib/sequencer.rb', line 138

def single_file?
  @filenames.length == 1
end

#to_a ⇒ Object

Returns the array of filenames



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# File 'lib/sequencer.rb', line 215

def to_a
  @filenames.dup
end

#to_paths ⇒ Object

Returns paths to the files



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# File 'lib/sequencer.rb', line 220

def to_paths
  @filenames.map{|f| File.join(@directory, f) }
end

#to_s ⇒ Object 



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# File 'lib/sequencer.rb', line 163

def to_s
  return @filenames[0] if (!numbered? || single_file?)
  
  printable = unless single_file?
    @ranges.map do | r |
      "%d..%d" % [r.begin, r.end]
    end.join(', ')
  else
    @ranges[0].begin
  end
  @inspect_pattern % "[#{printable}]"
end

#to_sequences ⇒ Object

If this Sequence has gaps, this method will return an array of all subsequences that it contains

s # => #<broken_seq.[123..568, 578..702].tif>
s.to_sequences # => [#<broken_seq.[123..568].tif>, #<broken_seq.[578..702].tif>]



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# File 'lib/sequencer.rb', line 149

def to_sequences
  return [self] unless gaps?
  
  last_offset = 0
  
  @ranges.map do | frame_range |
    frames_in_seg = frame_range.end - frame_range.begin
    seg_filenames = @filenames[last_offset..(last_offset + frames_in_seg)]
    last_offset = last_offset + frames_in_seg + 1
    s = self.class.new(@directory, seg_filenames)
  end
end