locale.d

/*
  Copyright (C) 2011-2016 Mario Cianciolo <mr.udda@gmail.com>

  This file is part of playfair.

  playfair is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  playfair is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with playfair.  If not, see <http://www.gnu.org/licenses/>.
*/

module playfair.locale;

import std.stdio, std.string, std.cstream;

bool ansi_terminal = true; // enables ANSI escape sequences

void WriteFormattedString(char[] str, char[] arg="") {
	char[] s = str;
	s = replace(s,"$APPNAME",	"Playfair");
	s = replace(s,"$BINARY_P",	"playfair");	
	s = replace(s,"$BINARY",	"[b]playfair[/]");
	s = replace(s,"$AUTHOR",	"Salvatore Udda");
	s = replace(s,"$VERSION",	"0.7");
	s = replace(s,"$EMAIL",		"mr.udda@gmail.com");
	s = replace(s,"$ARG",		arg);


	if (ansi_terminal) {
		s = replace(s,"[b]","\033[1m");
		s = replace(s,"[u]","\033[4m");
		s = replace(s,"[-]","\033[7m");
		s = replace(s,"[/]","\033[0m");
	} else {
		s = replace(s,"[b]","");
		s = replace(s,"[u]","");
		s = replace(s,"[-]","");
		s = replace(s,"[/]","");
	}

	derr.writef(s);
}





const char[] help_str = "
[u][b]SINTAX[/]
    $BINARY -e [u]chiave[/] [u]testo[/]
    $BINARY --encode [u]chiave[/] [u]testo[/]
        Encodes input text using specified key.

    $BINARY -d [u]chiave[/] [u]testo[/]
    $BINARY --decode [u]chiave[/] [u]testo[/]
        Decodes input text using specified key. Parses decoded text and removes
        extra characters (X, Q) probably inserted to separate twin letters.

    $BINARY -r [u]chiave[/] [u]testo[/]
    $BINARY --rawdecode [u]chiave[/] [u]testo[/]
        Decodes input text using specified key. Does not modify decoded text.
        Useful if you think the original message contains 'X's that were
        removed in --decode mode.

    $BINARY -m [u]chiave[/]
    $BINARY --matrix [u]chiave[/]
        Views the matrix correspondinf to specified key.

    $BINARY -v
    $BINARY --version
        Views version notes.

    $BINARY -?
    $BINARY --help
        Views this help.

    The only mandatory argument is the first one (execution mode). If one or
    more arguments are not specified, they will be asked at runtime.

      [b]A B C D E[/]
      [b]F G H I K[/]        This is standard matrix, used if input key is a
      [b]L M N O P[/]        empty string ([b]\"\"[/]). Remember to enclose
      [b]Q R S T U[/]        your key and text in double quotes ([b]\"[/]).
      [b]V W X Y Z[/]



[u][b]KEY MODIFIERS[/]
    Several special characters can be put before the key to alter the placing
    of the letters in the matrix:

      [b]>[/]   (Offset +)
          Every occurence of this character makes the matrix shift one place
          forward. Letters in the matrix are like into a circular queue, so
          places left empty by shifted letters will be occupied by the last
          letters of the matrix. E.g: in [u]>>chiave[/] 'C' will be the third
          character, while the first will be 'Y'.

      [b]<[/]   (Offset -)
          Every occurence of this character makes the matrix shift one place
          backward. Letters in the matrix are like into a circular queue, so
          places left empty by shifted letters will be occupied by the first
          letters of the matrix. E.g: in [u]<<chiave[/] 'A' will be the first
          character, while 'C' will be the 23rd.

      [b]@[/]   (Spiral)
          Letters in the matrix will be placed clockwise in a spiral shape,
          instead of default. Starting point is upper left corner, but can be
          changed using [b]<[/] and [b]>[/] modifiers.

      [b]:[/]   (Reverse)
          Reverse order of letters of the matrix. Letters will be places from
          last to first in case of row-by-row placement, and in case of spiral
          placement they will be placed from center to upper left corner.

      [b]-[/]   (Invert)
          Inverts direction of placement of letters into the matrix. Letters
          will be placed right-to-left in case of row-by-row placement, and in
          case of spiral placement they will be placed counterclockwise.


      [b]X W U T S[/]
      [b]R P E V Q[/]        Example matrix generated by the key
      [b]O Z Y A N[/]        [u]-<>>@<>>chiaveprova[/]: spiral starting from
      [b]B C H I M[/]        center, with +2 offset
      [b]D F G K L[/]

    To view the matrix generated from a key, run $BINARY -m [u]key[/]



[u][b]EXIT CODE[/]
    Application returns [b]0[/] if the command is executed successfully, and
    returns [b]1[/] in case of errors in command line.



[u][b]INFORMAZIONI[/]
    Author: $AUTHOR
      $EMAIL

    Informations about Playfair cipher:
      https://en.wikipedia.org/wiki/Playfair_cipher

";

const char[] choice_str = "
$APPNAME $VERSION
	1. Encode plain text
	2. Decode ciphered text
	3. Decode ciphered text (raw mode, keep 'X's)
	4. View matrix generated by a key
	5. View version notes
	6. View help

Insert a number [1-6]: ";

const char[] invalidchoice_str = "Invalid choice. Insert a number [1-6]: ";


const char[] version_str = "$APPNAME version $VERSION by $AUTHOR <$EMAIL>\n";

const char[] unrecognized_option_str = "\"$ARG\": unrecognized option.\nType $BINARY_P -? for help.\n";
const char[] insertkey_str = "Insert key: ";
const char[] inserttxt_str = "Insert message to parse and press Enter.\n";