Convert ansi files output by THE DRAW to html

ascii2html.cpp

/*
Copyright © Ethan Apodaca 2016
[email protected]

This program 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.

This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.

usage:
g++ -std=c++11 ascii2html.cpp -o ascii2html
iconv -f 437 SOMEFILE.ANS | ./ascii2html > tower.html

Add output to webpage

*/


#include <iostream>
#include <sstream>
#include <string>
#include <algorithm>

using namespace std;

// For esc-codes details: http://ascii-table.com/ansi-escape-sequences.php
char enders[14] = {'H', 'f', 'A', 'B', 'C', 'D', 's', 'u', 'J', 'K', 'm', 'h', 'l', 'p'};

enum color {
  BLACK = 30,
  RED = 31,
  GREEN = 32,
  YELLOW = 33,
  BLUE = 34,
  MAGENTA = 35,
  CYAN = 36,
  WHITE = 37
};

#define idName(x) case x: return #x

string ColorToName(int id) {
  switch(id) {
    idName(BLACK);
    idName(RED);
    idName(GREEN);
    idName(YELLOW);
    idName(BLUE);
    idName(MAGENTA);
    idName(CYAN);
    idName(WHITE);
    default: return NULL;
  }
}

bool isEnder(char character) {
  for(int ii = 0; ii< 14; ii++) {
    if(enders[ii] == character) {
      return true;
    }
  }
  return false;
}

bool firstSpan = true;
bool bold = false;

int colorCode = -1;
int bgColorCode = -1;

string generateSpan() {
  string classes = "";
  if(colorCode != -1) {
    classes = (bold?"dark-":"") + ColorToName(colorCode);
  }
  if(bgColorCode != -1) {
    classes = classes + " bg-" + (bold?"dark-":"") + ColorToName(bgColorCode);
  }
  transform(classes.begin(), classes.end(), classes.begin(), ::tolower);
  return "<span class=\"" + classes + "\">";
}

void processCode(string code) {
  istringstream ss(code);
  string part;
  while(std::getline(ss, part, ';')) {
    int numCode = std::stoi(part.c_str());
    if(numCode == 0) {
      bold = false;
      bgColorCode = -1;
      colorCode = -1;
    } else if(numCode == 1) {
      bold = true;
    } else if(numCode>=30 && numCode <=37) {
      colorCode = numCode;
    } else if(numCode>=40 && numCode <=47) {
      bgColorCode = numCode - 10;
    }
  }
  if(!firstSpan) {
    cout<< "</span>";
  } else {
    firstSpan = false;
  }
  cout << generateSpan();
}

int main() {
  for (string line; getline(cin, line);) {
    for (auto ii = 0 ; ii < line.length(); ii++) {
      char character = line[ii];
      if(character == '\x1b') {
        string code = "";
        while(!isEnder(character)) {
          character = line[++ii];
          if(character != '[' && !isEnder(character)) {
            code = code + character;
          }
          if(isEnder(character)) {
            if(character == 'm') {
              processCode(code);
            } else if(character == 'C') {
              for(auto ii=std::stoi(code.c_str());ii>0;ii--) {
                cout << "</span>&nbsp;";
              }
              cout << generateSpan();
            }
          }
        }
      } else {
        if(character == ' ') {
          cout << "</span>&nbsp;" << generateSpan();
        } else {
          cout << character;
        }
      }
    }
  }
  cout << "</span>";
  return 0;
}