Class: TotalCompressor::BaseCompressor

Inherits:
Object
  • Object
show all
Defined in:
lib/total_compressor.rb,
lib/total_compressor/compressors/base_compressor.rb

Direct Known Subclasses

T7z, TGzip, TRar, TZip

Constant Summary collapse

PROJECT = 
Dir.pwd
TEXT_FILE = 
'test/text_file.txt'
FILE = 
"#{PROJECT}/#{TEXT_FILE}"
HOME = 
Dir.home
TEST = 
"tmp_#{Time.now.to_i}"
TEST_FILE = 
"#{HOME}/#{TEST}/#{TEXT_FILE.split('/').last}"
TEMP_FOLDER = 
"#{HOME}/#{TEST}/"
TEST_FOLDER = 
"#{HOME}/#{TEST}/#{TEST}"
TEST_FOLDER_UNCOMPRESSED = 
"#{HOME}/#{TEST}/UNCOMPRESSED"
HASH_TYPE = 
{
  'z' => 'zip',
  'r' => 'rar',
  '7' => '7z',
  'g' => 'gzip'
}
TYPE = 
{
  'zip' => {
    'tool'            => 'zip',
    'compress_file'   => '-9',
    'compress_folder' => '-9r',
    'success_message' => /(deflated|stored)/
  },
  'rar' => {
    'tool'            => 'rar',
    'compress_file'   => 'a',
    'compress_folder' => 'a',
    'decompress'      => 'x',
    'success_message' => /Done/
    },
  '7z' => {
    'tool'            => '7z',
    'compress_file'   => 'a',
    'compress_folder' => 'a',
    'decompress'      => 'x',
    'success_message' => /Everything is Ok/
  },
  'gzip' => {}
}
MSG = 
{
  :unsupported => 'Unsupported archive type!',
  :exception   => 'Exception!',
  :incorrect   => 'Incorrect archive filename!'
}

Instance Method Summary collapse

Instance Method Details

#back_to_last_dir ⇒ Object 



56
57
58
 
# File 'lib/total_compressor/compressors/base_compressor.rb', line 56

def back_to_last_dir
  chdir(@current_dir)
end

#chdir(folder) ⇒ Object 



64
65
66
67
68
69
70
71
 
# File 'lib/total_compressor/compressors/base_compressor.rb', line 64

def chdir(folder)
  if File.directory?(folder)
    Dir.chdir(folder)
    true
  else
    false
  end
end

#compress(path, format) ⇒ Object 



121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
 
# File 'lib/total_compressor/compressors/base_compressor.rb', line 121

def compress(path, format)
  save_current_dir
  result = {
    :success => false
  }
  folder = get_folder(path)
  return result unless chdir(folder)
  begin
    file = get_file(path)
    archive = file + ".#{format}"
    if file
      message = if File.directory?(path)
        %x[#{TYPE[format]['tool']} #{TYPE[format]['compress_folder']} #{archive} #{file}]
      else
        %x[#{TYPE[format]['tool']} #{TYPE[format]['compress_file']} #{archive} #{file}]
      end
      if message && message.match(TYPE[format]['success_message'])
        result[:success] = true
        result[:file] = "#{folder}/#{archive}"
      else
        result[:error] = message
      end
    else
      result[:error] = BaseCompressor::MSG[:incorrect]
    end
  rescue
    result[:error] = BaseCompressor::MSG[:exception]
  ensure
    back_to_last_dir
  end
  return_result(result)
end

#decompress(path, format) ⇒ Object 



154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
 
# File 'lib/total_compressor/compressors/base_compressor.rb', line 154

def decompress(path, format)
  save_current_dir
  result = {
      :success => false,
      :files => []
  }
  folder = get_folder(path)
  Dir.chdir(folder)
  begin
    file = get_file(path)
    previous_entries = Dir.entries(Dir.pwd)
    %x[#{TYPE[format]['tool']} #{TYPE[format]['decompress']} #{file}]
    new_entries = Dir.entries(Dir.pwd)
    uncompressed_entries = new_entries - previous_entries
    uncompressed_entries.each{|entry| result[:files] << "#{folder}/#{entry}" }
    result[:success] = true
  rescue
    result[:error] = BaseCompressor::MSG[:exception]
  ensure
    back_to_last_dir
  end
  return_result(result)
end

#get_file(path) ⇒ Object 



73
74
75
76
 
# File 'lib/total_compressor/compressors/base_compressor.rb', line 73

def get_file(path)
  file = path.split('/')[-1]
  file ? file : path
end

#get_folder(path) ⇒ Object 



60
61
62
 
# File 'lib/total_compressor/compressors/base_compressor.rb', line 60

def get_folder(path)
  path.split('/')[0..-2].join('/')
end

#get_format ⇒ Object 



178
179
180
 
# File 'lib/total_compressor/compressors/base_compressor.rb', line 178

def get_format
  self.class.to_s.split('::').last.downcase[1..-1]
end

#prepare_test_files ⇒ Object 



78
79
80
81
82
83
84
85
86
 
# File 'lib/total_compressor/compressors/base_compressor.rb', line 78

def prepare_test_files
  FileUtils.rm_rf(TEMP_FOLDER, secure: true)
  Dir.mkdir(TEMP_FOLDER)
  Dir.mkdir(TEST_FOLDER)
  Dir.mkdir(TEST_FOLDER_UNCOMPRESSED)
  FileUtils.cp("#{FILE}", TEMP_FOLDER)
  FileUtils.cp("#{FILE}", TEST_FOLDER)
  chdir(HOME)
end

#return_result(result) ⇒ Object 



182
183
184
185
 
# File 'lib/total_compressor/compressors/base_compressor.rb', line 182

def return_result(result)
  ap result unless result[:success]
  result
end

#save_current_dir ⇒ Object 



52
53
54
 
# File 'lib/total_compressor/compressors/base_compressor.rb', line 52

def save_current_dir
  @current_dir = Dir.pwd
end

#skip_test?(format, test_set) ⇒ Boolean

Returns:

  • (Boolean) 


117
118
119
 
# File 'lib/total_compressor/compressors/base_compressor.rb', line 117

def skip_test?(format, test_set)
  true if File.directory?(test_set) && format == 'gzip'
end

#test(format) ⇒ Object 



93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
 
# File 'lib/total_compressor/compressors/base_compressor.rb', line 93

def test(format)
  test_sets = [
    TotalCompressor::BaseCompressor::TEST_FILE,
    TotalCompressor::BaseCompressor::TEST_FOLDER
  ]
  result = {
    :success => true
  }
  prepare_test_files
  test_sets.each do |test_set|
    next if skip_test?(format, test_set)
    res = eval("TotalCompressor::T#{format.capitalize}.new.compress(\'#{test_set}\')")
    if res[:success]
      FileUtils.cp("#{res[:file]}", TEST_FOLDER_UNCOMPRESSED)
      res = eval("TotalCompressor::T#{format.capitalize}.new.decompress(\'#{TEST_FOLDER_UNCOMPRESSED}/#{res[:file].split('/').last}\')")
      result[:success] = false unless res[:success]
    else
      result[:success] = false
    end
  end
  utilize_test_files
  result[:success] ? 'Success' : 'Failure'
end

#utilize_test_files ⇒ Object 



88
89
90
91
 
# File 'lib/total_compressor/compressors/base_compressor.rb', line 88

def utilize_test_files
  FileUtils.rm_rf("#{TEMP_FOLDER}", secure: true)
  chdir(PROJECT)
end