Class: SRT::Shell

Inherits:
Object
  • Object
show all
Defined in:
lib/srt/shell.rb,
lib/srt/shell/version.rb

Constant Summary collapse

SAVE_HOOK_FILE = 
::File.expand_path('~/.srt_shell_hook')
BOM_STRING = 
"\xEF\xBB\xBF"
BOM_REGEX = 
/#{BOM_STRING}/
USAGE_MSG = 
<<USAGE
Usage: #{$0} [SRT_FILENAME]
    Commands:
        EX: load 'SRT_FILENAME'
        EX: interval 90
        EX: upshift|u 50 5000
        EX: forward|f 50 5000
        EX: remove 50
        EX: save
        EX: show|s 50
        EX: search TERM
        EX: help|h
        EX: exit
USAGE
VERSION = 
"0.0.1"

Instance Method Summary collapse

Constructor Details

#initialize(path = nil, save_hook = SAVE_HOOK_FILE) ⇒ Shell

Returns a new instance of Shell.



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# File 'lib/srt/shell.rb', line 26

def initialize(path = nil, save_hook=SAVE_HOOK_FILE)
  @file, @path = nil, nil
  @bom = false
  load_path(path) if path
  @save_hook = ::File.exists?(save_hook) ? save_hook : nil
end

Instance Method Details

#eval_command(cmd) ⇒ Object 



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# File 'lib/srt/shell.rb', line 135

def eval_command(cmd)
  case cmd
  when /^\s*(?:help|h)\s*$/
    puts USAGE_MSG
    return
  when /^\s*exit\s*$/
    exit 0
  when /^\s*load\s+\'?([^']+)\'?\s*$/
    load_path($1)
    return
  end

  if @file
    case cmd
    when /^\s*(?:show|s)\s+(\d+)\s*$/
      show($1.to_i)
    when /^\s*(?:showall)\s*$/
      show_all
    when /^\s*interval\s+(\d+)\s*$/
      scan_interval($1.to_i)
    when /^\s*(?:u|rewind)\s+(\d+)\s+(\d+)\s*$/
      rewind($1.to_i, $2.to_i)
    when /^\s*(?:f|forward)\s+(\d+)\s+(\d+)\s*$/
      forward($1.to_i, $2.to_i)
    when /^\s*(?:remove)\s+(\d+)\s*$/
      remove($1.to_i)
    when /^\s*save\s*$/
      save
    when /^\s*search\s*(.*)$/
      search($1)
    else
      puts "Invalid command"
    end
  else
    puts "File is not loaded. Load a file using the 'load' command"
  end
end

#forward(index, time) ⇒ Object 



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# File 'lib/srt/shell.rb', line 78

def forward(index, time)
  timeshift(index, "+#{time}ms")
end

#load_path(path) ⇒ Object 



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# File 'lib/srt/shell.rb', line 33

def load_path(path)
  path = ::File.expand_path(path)
  @path = path

  # Test if file contains BOM
  ::File.open(path) do |file|
    lines = file.read.split("\n")
    unless lines.empty?
      if lines[0].match(BOM_REGEX)
        lines[0].sub!(BOM_REGEX, '')
        @bom = true
      end
      @file = SRT::File.parse(lines.join("\n"))
    else
      raise ArgumentError, 'Invalid SRT file'
    end
  end
  self
end

#remove(index) ⇒ Object 



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# File 'lib/srt/shell.rb', line 99

def remove(index)
  check_index(index)
  index -= 1
  @file.lines.delete_at(index)
  @file.lines[index..-1].each do |line|
    line.sequence -= 1
  end
rescue IndexError => error
  puts error.message
end

#rewind(index, time) ⇒ Object 



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# File 'lib/srt/shell.rb', line 74

def rewind(index, time)
  timeshift(index, "-#{time}ms")
end

#save(path = @path) ⇒ Object 



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# File 'lib/srt/shell.rb', line 124

def save(path=@path)
  ::File.open(path, 'w') do |file|
    file.print BOM_STRING if @bom
    file.print @file.to_s.split("\n").join("\r\n"), "\r\n\r\n"
  end
  if @save_hook
    output = `sh #{@save_hook}`
    puts output unless output.empty?
  end
end

#scan_interval(input_time) ⇒ Object 



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# File 'lib/srt/shell.rb', line 82

def scan_interval(input_time)
  unless time = Parser.timespan("#{input_time}ms")
    puts "Invalid time used #{input_time}"
    return
  end
  end_time = 0
  result = []
  @file.lines.each do |line|
    interval = line.start_time - end_time
    if interval >= time
      result << "index: #{line.sequence} time: #{line.time_str} gap: #{interval}"
    end
    end_time = line.end_time
  end
  puts result.join("\n")
end

#search(term) ⇒ Object 



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# File 'lib/srt/shell.rb', line 110

def search(term)
  result = []
  @file.lines.each do |line|
    if line.text.find { |text| text[term] }
      result << line.to_s
    end
  end
  puts result.join("\n") + "\n"
end

#show(index) ⇒ Object 



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# File 'lib/srt/shell.rb', line 53

def show(index)
  check_index(index)
  puts @file.lines[index - 1].to_s + "\n"
rescue IndexError => error
  puts error.message
end

#show_all ⇒ Object 



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# File 'lib/srt/shell.rb', line 120

def show_all
  puts @file
end

#timeshift(index, timecode) ⇒ Object 



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# File 'lib/srt/shell.rb', line 60

def timeshift(index, timecode)
  check_index(index)
  if time = Parser.timespan(timecode)
    @file.lines[index-1..-1].each do |line|
      line.start_time += time
      line.end_time += time
    end
  else
    puts "Invalid timeshift input (#{index}, #{timecode})"
  end
rescue IndexError => error
  puts error.message
end