move dirs

code/Crystal/Colorize.cr

@@ -0,0 +1,24 @@
+require "colorize"
+
+"foo".colorize(:green)
+100.colorize(:red)
+[1, 2, 3].colorize(:blue)
+
+# Available colors are:
+# :default
+# :black
+# :red
+# :green
+# :yellow
+# :blue
+# :magenta
+# :cyan
+# :light_gray
+# :dark_gray
+# :light_red
+# :light_green
+# :light_yellow
+# :light_blue
+# :light_magenta
+# :light_cyan
+# :white

code/Crystal/README.md

@@ -0,0 +1,13 @@
+# Crystal
+
+## std
+- [Значение из Regex::MatchData](value_from_match.cr) - Получить значение из `Regex::MatchData("Happy")`
+- [IO::TimeoutError](prompt_timeout.cr) - Установка тайм-аута на пользовательский ввод
+- [ENV["..."]](env_variable.cr) - Переменные среды
+- [Colorize](Colorize.cr) - Цветной вывод в консоль
+- [JSON](json.cr) - Пример работы с JSON
+- [Fiber](schedule.cr) - Пример распаралеливания кода и расписания
+- [http/client](http_client.cr) - Пример HTTP клиента
+
+## Stuff
+- [`irc_bot.cr`](irc_bot.cr) - Реализация клиента (бота) для IRC

code/Crystal/UNIXSockets/by_faustinoaq/client.cr

@@ -0,0 +1,28 @@
+require "socket"
+
+client = UNIXSocket.new("/tmp/myapp.sock")
+
+Signal::INT.trap {
+  client.puts "quit"
+  exit
+}
+
+print "name: "
+name = gets.to_s
+
+spawn {
+  loop {
+    msg = client.gets
+    if msg
+      puts msg
+    else
+      puts "server closed"
+      exit
+    end
+  }
+}
+
+loop {
+  msg = gets.to_s
+  client.puts "#{name}: #{msg}"
+}

code/Crystal/UNIXSockets/by_faustinoaq/link.txt

@@ -0,0 +1 @@
+https://github.com/crystal-lang/crystal/issues/4277#issuecomment-294009173

code/Crystal/UNIXSockets/by_faustinoaq/server.cr

@@ -0,0 +1,38 @@
+require "socket"
+
+server = UNIXServer.new("/tmp/myapp.sock")
+CLIENTS = [] of UNIXSocket
+
+Signal::INT.trap {
+  puts "closing server..."
+  server.close
+  exit
+}
+
+def on_message(client)
+  loop {
+    msg = client.gets
+    if msg == "quit"
+      puts "deleting client..."
+      CLIENTS.delete client
+      pp CLIENTS.size
+      break
+    else
+      yield msg
+    end
+  }
+end
+
+loop {
+  puts "waiting for client on /tmp/myapp.sock"
+  new_client = server.accept
+  spawn {
+    on_message(new_client) { |msg|
+      CLIENTS.each { |client|
+        client.puts msg unless client == new_client
+      }
+    }
+  }
+  CLIENTS << new_client
+  pp CLIENTS.size
+}

code/Crystal/UNIXSockets/client.cr

@@ -0,0 +1,24 @@
+require "socket"
+
+# connect to socket
+sock = UNIXSocket.new("/tmp/myapp.sock")
+
+loop do
+  print "Enter command [help, start, run]: "
+
+  # get string from terminal input
+  string = gets.not_nil!.to_s
+
+  if string == "q"
+    break
+  end
+
+  # send string to server
+  sock.puts "#{string}\n"
+
+  # get response from server & print
+  response = sock.gets
+  puts response
+end
+
+sock.close

code/Crystal/UNIXSockets/server.cr

@@ -0,0 +1,46 @@
+require "socket"
+require "file_utils"
+
+SOCKET = "/tmp/myapp.sock"
+
+begin
+  FileUtils.rm(SOCKET)
+rescue e : File::NotFoundError
+end
+
+server = UNIXServer.new(SOCKET)
+CLIENTS = [] of UNIXSocket
+
+Signal::INT.trap do
+  puts "Closing server..."
+  server.close(delete = true)
+
+  exit
+end
+
+def handle_client(client)
+  loop do
+    message = client.gets
+
+    p! client
+
+    if message == "start"
+      puts "::request START command::"
+      client.puts "Hello :)"
+    elsif message == "help"
+      puts "::request HELP command::"
+      client.puts "This example ECHO unix server!"
+    elsif message == "run"
+      puts "::request RUN command::"
+      client.puts "Ready, Set, GO!"
+    else
+      break
+    end
+  end
+end
+
+puts "Listen..."
+
+while client = server.accept
+  spawn handle_client(client)
+end

code/Crystal/ctrl-c_interrupt.cr

@@ -0,0 +1,9 @@
+LibC.signal Signal::INT.value, ->(s : Int32) {
+  puts "CTRL-C handler here!"
+  exit
+}
+
+Signal::INT.trap do
+  puts "CTRL-C handler here!"
+  exit
+end

code/Crystal/env_variable.cr

@@ -0,0 +1,3 @@
+shell = ENV["SHELL"]
+
+puts "SHELL: #{shell}\nLANG:  #{ENV["COLORTERM"]}"

code/Crystal/http_client.cr

@@ -0,0 +1,11 @@
+require "json"
+require "http/client"
+
+minecraft_url = "https://launchermeta.mojang.com/mc/game/version_manifest_v2.json"
+response = HTTP::Client.get minecraft_url
+
+version_manifest = JSON.parse(response.body)
+
+version = version_manifest["latest"]["release"]
+
+puts version

code/Crystal/irc_bot.cr

@@ -0,0 +1,24 @@
+require "socket"
+
+puts "Connecting..."
+irc = TCPSocket.new("iiiypuk.me", 6667)
+
+irc << "USER crystal localhost localhost :This is a bot!\n"
+irc << "NICK crystal\r\n"
+irc << "JOIN #admin\r\n"
+irc << "PRIVMSG #admin :!time\r\n"
+
+while true
+  response = irc.gets
+  puts response
+
+  if response.to_s.includes?("PING")
+    irc << "PONG #{response.to_s.split[1]}\r\n"
+  end
+
+  if response.to_s.includes?("!time")
+    irc << "PRIVMSG #admin :#{Time.local.to_unix}\r\n"
+  end
+end
+
+irc.close

code/Crystal/json.cr

@@ -0,0 +1,5 @@
+require "json"
+
+# Парсинг строки
+value = JSON.parse("[1, 2, 3]")
+p! value[0]

code/Crystal/prompt_timeout.cr

@@ -0,0 +1,2 @@
+STDIN.read_timeout = 1
+STDIN.gets # raises IO::TimeoutError (after 1 second)

code/Crystal/schedule.cr

@@ -0,0 +1,18 @@
+def every(period : Time::Span, &block : -> T) forall T
+  spawn do
+    loop do
+      block.call
+      sleep period
+    end
+  end
+end
+
+every(2.seconds) {
+  puts "-@-@-"
+}
+
+every(4.seconds) {
+  puts "(-.-)Zzz..."
+}
+
+sleep

code/Crystal/value_from_match.cr

@@ -0,0 +1,8 @@
+test_string_1 = "rw------- (0o600)"
+# test_string_2 = "rwx------ (0o700)"
+
+if /\d{3}/.match(test_string_1).try &.[0] != "600"
+  puts "Password file permissions is not RW for you.".colorize(:red)
+
+  exit(0)
+end