class Computer

A simple Virtual Private Computer written in ruby. This is the main (and, currently, only) Class. This class supports chaining 👍

Public Class Methods

geach() { |h, f, h, h| ... } click to toggle source

Do the given block for each file in the global files

@yield [creator, filename, contents, time] Yield block to do for each file @return (see create)

# File lib/rvpc.rb, line 150
def self.geach
  @@gfiles.each do |f, h|
    yield(h["creator"], f, h["contents"], h["time"]) if block_given?
    puts "#{f}: #{h}" unless block_given?
  end
  self
end

get_gfiles() click to toggle source

Gets the Hash containing all the global files

@return [Hash] Hash containing all the global files

# File lib/rvpc.rb, line 95
def self.get_gfiles
  @@gfiles unless @@gfiles.nil?
end

get_users() click to toggle source

Gets the Hash containing all the users

@return [Hash] Hash containing all the users

# File lib/rvpc.rb, line 88
def self.get_users
  @@users unless @@users.nil?
end

gfile(filename) { |gfiles["creator"], gfiles["contents"], gfiles["time"]| ... } click to toggle source

Gets the specified global file, can also be used with a yield block

@param filename [String] The filename of the global file to return @return [Hash, Computer] If a block is given, it returns self, otherwise it returns the file Hash @yield [creator, contents, time] Optional yield block for the file

# File lib/rvpc.rb, line 105
def self.gfile(filename)
  filename = filename.gsub(/[\x00\/\\:\*\?\"<>\|]/, '_')
  yield(@@gfiles[filename]["creator"], @@gfiles[filename]["contents"], @@gfiles[filename]["time"]) if block_given?
  @@gfiles[filename] unless block_given?
  self unless block_given?
end

gopen(username, password, file) click to toggle source

Loads the specified JSON file into the global files

@note This replaces the current global files, so be careful! @param username [String] sudo-like verification @param password [String] sudo-like verification @return (see create)

# File lib/rvpc.rb, line 133
def self.gopen(username, password, file)
  file = file.gsub(/[\x00\/\\:\*\?\"<>\|]/, '_')
  if (Digest::SHA256.hexdigest password) == @@users[username.to_sym][:sha] && (Digest::MD5.hexdigest password) == @@users[username.to_sym][:md5]
    @@gfiles = JSON.parse(File.read(file)) if File.exists?(file)
  else
    puts "Invalid password."
  end
rescue
  puts "Error reading."
ensure
  self
end

gsave(file) click to toggle source

Saves all the global files to a JSON file

@param file [String] The relative path of the file, including the filename @return (see create)

# File lib/rvpc.rb, line 116
def self.gsave(file)
  file = file.gsub(/[\x00\/\\:\*\?\"<>\|]/, '_')
  File.open(file, "w") do |f|
    f.write(JSON.pretty_generate(@@gfiles))
  end
rescue
  puts "Error writing."
ensure
  self
end

new(username, password) click to toggle source

Create a new Computer object

@param username [String] The username to create the new Computer with @param password [String] The password to assign to the username, the password’s SHA and MD5 are what’s stored @return [Computer] A brand-spankin’-new Computer object, with username and password

# File lib/rvpc.rb, line 14
def initialize(username, password)
  @username = username
  @sha = Digest::SHA256.hexdigest password
  @md5 = Digest::MD5.hexdigest password
  @files = Hash.new
  @@users[username.to_sym] = Hash.new
  @@users[username.to_sym][:sha] = @sha
  @@users[username.to_sym][:md5] = @md5
end

Public Instance Methods

create(filename, contents) click to toggle source

Create a new file for the current user

@param filename [String] The filename for the new file @param contents [String] The contents to dump into the new file @return [Computer] Returns the current object (for chaining)

# File lib/rvpc.rb, line 34
def create(filename, contents)
  filename = filename.gsub(/[\x00\/\\:\*\?\"<>\|]/, '_')
  @files[filename] = Hash.new
  @files[filename]["contents"] = contents
  @files[filename]["time"] = Time.now
  self
end

create_global(password, filename, contents) click to toggle source

Create a new global file, accessible by all users

@param password [String] Used sort of like sudo for writing to / @param (see create) @return (see create)

# File lib/rvpc.rb, line 47
def create_global(password, filename, contents)
  filename = filename.gsub(/[\x00\/\\:\*\?\"<>\|]/, '_')
  if (Digest::SHA256.hexdigest password) == @sha && (Digest::MD5.hexdigest password) == @md5
    @@gfiles[filename] = Hash.new
    @@gfiles[filename]["creator"] = @username
    @@gfiles[filename]["contents"] = contents
    @@gfiles[filename]["time"] = Time.now
  else
    puts "Invalid password"
  end
  self
end

delete(filename) click to toggle source

Deletes a file from the user’s fs

@return (see create)

# File lib/rvpc.rb, line 70
def delete(filename)
  filename = filename.gsub(/[\x00\/\\:\*\?\"<>\|]/, '_')
  @files.delete(filename) if @files.has_key?(filename)
  self
end

each() { |f, h, h| ... } click to toggle source

Do the given block for each file in the user’s fs

@yield [filename, contents, time] Yield block to do for each file @return (see create)

# File lib/rvpc.rb, line 162
def each
  @files.each do |f, h|
    yield(f, h["contents"], h["time"]) if block_given?
    puts "#{f}: #{h}" unless block_given?
  end
end

get(filename) click to toggle source

Returns the contents of the specified file from the user’s fs

@param filename [String] The filename of the file to return @return [String] The contents of the selected file

# File lib/rvpc.rb, line 80
def get(filename)
  filename = filename.gsub(/[\x00\/\\:\*\?\"<>\|]/, '_')
  @files[filename]["contents"] if @files.has_key?(filename).has_key?("contents")
end

user() click to toggle source

Return the username for the current user

@return [String] The current user’s username

# File lib/rvpc.rb, line 63
def user
  @username unless @username.nil?
end