Class: Bookbinder::FileSystem::Memory

Inherits:
Object
  • Object
show all
Defined in:
lib/bookbinder/file_system/memory.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Memory

Returns a new instance of Memory.



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# File 'lib/bookbinder/file_system/memory.rb', line 3

def initialize
  @index = {}
end

Instance Method Details

#each(&blk) ⇒ Object 



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# File 'lib/bookbinder/file_system/memory.rb', line 58

def each(&blk)
  @index.each_key(&blk)
end

#exists?(path) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/bookbinder/file_system/memory.rb', line 8

def exists?(path)
  @index.key?(path)
end

#get_file(path, mode = 'r', &blk) ⇒ Object

Creates a tempfile so you can do memory-efficient stuff.



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# File 'lib/bookbinder/file_system/memory.rb', line 32

def get_file(path, mode = 'r', &blk)
  read_before = mode[0] != 'w'
  write_after = mode[0] != 'r'
  begin
    tmpfile = Tempfile.new(File.basename(path))
    if read_before
      tmpfile.write(read(path))
      tmpfile.rewind
    end
    blk.call(tmpfile)
    if write_after
      tmpfile.rewind
      write(path, tmpfile.read)
    end
  ensure
    tmpfile.close
    tmpfile.unlink
  end
end

#get_io(path, &blk) ⇒ Object 



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# File 'lib/bookbinder/file_system/memory.rb', line 25

def get_io(path, &blk)
  blk.call(StringIO.new(read(path)))
end

#read(path) ⇒ Object

Raises:



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# File 'lib/bookbinder/file_system/memory.rb', line 13

def read(path)
  raise(Bookbinder::FileSystem::UnknownPath, path)  unless exists?(path)
  @index[path]
end

#set_file(path, file) ⇒ Object 



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# File 'lib/bookbinder/file_system/memory.rb', line 53

def set_file(path, file)
  write(path, file.read)
end

#write(path, data) ⇒ Object 



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# File 'lib/bookbinder/file_system/memory.rb', line 19

def write(path, data)
  @index[path] = data
  nil
end