/* bzflag
 * Copyright (c) 1993-2025 Tim Riker
 *
 * This package is free software;  you can redistribute it and/or
 * modify it under the terms of the license found in the file
 * named COPYING that should have accompanied this file.
 *
 * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

/*
 * common definitions
 */

#ifndef __TEXTUTILS_H__
#define __TEXTUTILS_H__

#include "common.h"

/* system interface headers */
#include <algorithm>
#include <ctype.h>
#ifdef HAVE_DEFINED_TOLOWER
#undef tolower
#undef toupper
#endif
#include <string>
#include <stdarg.h>
#include <vector>

/** This namespace provides basic functionality to parse and
 * format strings
 */
namespace TextUtils
{
std::string vformat(const char* fmt, va_list args);
std::string format(const char* fmt, ...);

/** returns a string converted to lowercase
 */
inline std::string tolower(const std::string& s)
{
    std::string trans = s;

    for (std::string::iterator i=trans.begin(), end=trans.end(); i!=end; ++i)
        *i = ::tolower(*i);
    return trans;
}

/** returns a string converted to uppercase
 */
inline std::string toupper(const std::string& s)
{
    std::string trans = s;
    for (std::string::iterator i=trans.begin(), end=trans.end(); i!=end; ++i)
        *i = ::toupper(*i);
    return trans;
}

inline std::string ltrim(const std::string& s, const char* trim = " ")
{
    if (!trim)
        return s;

    size_t pos = s.find_first_not_of(trim);

    if (pos == std::string::npos)
        return s;

    return s.substr(pos, s.length() + 1);
}

inline std::string rtrim(const std::string& s, const char* trim = " ")
{
    if (!trim)
        return s;

    size_t pos = s.find_last_not_of(trim);

    if (pos == std::string::npos)
        return s;

    return s.substr(0, pos + 1);
}

inline std::string trim(const std::string& s, const char* trim = " ")
{
    return (rtrim(ltrim(s, trim), trim));
}

/** replace all of in in replaceMe with withMe
 */
std::string replace_all(const std::string& in, const std::string& replaceMe, const std::string& withMe);

/** return copy of string with all whitespace stripped
 */
std::string no_whitespace(const std::string &s);

/**
 * Get a vector of strings from a string, using all of chars of thedelims
 * string as separators. If maxTokens > 0, then the last 'token' maycontain delimiters
 * as it just returns the rest of the line
 * if you specify use quotes then tokens can be grouped in quotes and delimeters
 * inside quotes are ignored.
 * Hence /ban "Mr Blahblah" isajerk parses to "/ban", "Mr Blahlah" and "isajerk"
 * but so does "Mr Blahblah" "isajerk", so if you want 3 tokens and a delimeter
 * is in one of the tokens, by putting quotes around it you can get the correct
 * parsing. When use quotes is enabled, \'s and "'s should\can be escaped with \
 * escaping is not currently done for any other character.
 * Should not have " as a delimeter if you want to use quotes
 */
std::vector<std::string> tokenize(const std::string& in, const std::string &delims, const int maxTokens = 0,
                                  const bool useQuotes = false);

/** convert a string representation of some duration into minutes
 *  example: "1d2h16m" -> 1500
 *  return true if the string can be parsed
 */
bool parseDuration(const char *duration, int &durationInt);

// C h a r a c t e r  c o m p a r i s o n

/** compare_nocase is strait from Stroustrup.  This implementation uses
 * strings instead of char arrays and includes a maxlength bounds check.
 * It compares two strings and returns 0 if equal, <0 if s1 is less than
 * s2, and >0 if s1 is greater than s2.
 */
inline int compare_nocase(const std::string& s1, const std::string &s2, int maxlength=4096)
{
    std::string::const_iterator p1 = s1.begin();
    std::string::const_iterator p2 = s2.begin();
    int i=0;
    while (p1 != s1.end() && p2 != s2.end())
    {
        if (i >= maxlength)
            return 0;
        if (::tolower(*p1) != ::tolower(*p2))
            return (::tolower(*p1) < ::tolower(*p2)) ? -1 : 1;
        ++p1;
        ++p2;
        ++i;
    }
    return (s2.size() == s1.size()) ? 0 : (s1.size() < s2.size()) ? -1 : 1; // size is unsigned
}



/** utility function returns truthfully whether
 * given character is a letter.
 */
inline bool isAlphabetic(const char c)
{
    if (( c > 64 && c < 91) ||
            ( c > 96 && c < 123))
        return true;
    return false;
}


/** utility function returns truthfully whether
 * given character is a number.
 */
inline bool isNumeric(const char c)
{
    if (( c > 47 && c < 58))
        return true;
    return false;
}


/** utility function returns truthfully whether
 * a given character is printable whitespace.
 * this includes newline, carriage returns, tabs
 * and spaces.
 */
inline bool isWhitespace(const char c)
{
    if ((( c >= 9 ) && ( c <= 13 )) ||
            (c == 32))
        return true;
    return false;
}


/** utility function returns truthfully whether
 * a given character is punctuation.
 */
inline bool isPunctuation(const char c)
{
    if (( c > 32 && c < 48) ||
            ( c > 57 && c < 65) ||
            ( c > 90 && c < 97) ||
            ( c > 122 && c < 127))
        return true;
    return false;
}


/** utility function returns truthfully whether
 * given character is an alphanumeric.  this is
 * strictly letters and numbers.
 */
inline bool isAlphanumeric(const char c)
{
    if (isAlphabetic(c) || isNumeric(c))
        return true;
    return false;
}


/** utility function returns truthfully whether
 * given character is printable.  this includes
 * letters, numbers, and punctuation.
 * (but NOT whitespace)
 */
inline bool isVisible(const char c)
{
    if (isAlphanumeric(c) || isPunctuation(c))
        return true;
    return false;
}


/** utility function returns truthfully whether
 * given character is printable.  this includes
 * letters, numbers, punctuation, and whitespace
 */
inline bool isPrintable(const char c)
{
    return (isVisible(c) || isWhitespace(c));
}



// S t r i n g  i t e r a t i o n

/** utility method that returns the position of the
 * first alphanumeric character from a string
 */
inline int firstAlphanumeric(const std::string &input, unsigned short int max=4096)
{

    if (max > input.length())
        max = (unsigned short)input.length();

    for (unsigned short i = 0; i < max; i++)
        if (isAlphanumeric(input[i]))
            return i;

    return -1;
}


/** utility method that returns the position of the
 * first non-alphanumeric character from a string
 */
inline int firstNonalphanumeric(const std::string &input, unsigned short int max=4096)
{

    if (max > input.length())
        max = (unsigned short)input.length();

    for (unsigned short i = 0; i < max; i++)
        if (!isAlphanumeric(input[i]))
            return i;

    return -1;
}


/** utility method that returns the position of the
 * first printable character from a string
 */
inline int firstPrintable(const std::string &input, unsigned short int max=4096)
{

    if (max > input.length())
        max = (unsigned short)input.length();

    for (unsigned short i = 0; i < max; i++)
        if (isPrintable(input[i]))
            return i;

    return -1;
}


/** utility method that returns the position of the
 * first non-printable character from a string
 */
inline int firstNonprintable(const std::string &input, unsigned short int max=4096)
{
    if (max > input.length())
        max = (unsigned short)input.length();

    for (unsigned short i = 0; i < max; i++)
        if (!isPrintable(input[i]))
            return i;

    return -1;
}


/** utility method that returns the position of the
 * first visible character from a string
 */
inline int firstVisible(const std::string &input, unsigned short int max=4096)
{

    if (max > input.length())
        max = (unsigned short)input.length();

    for (unsigned short i = 0; i < max; i++)
        if (isVisible(input[i]))
            return i;

    return -1;
}


/** utility method that returns the position of the
 * first non visible character from a string (control
 * codes or whitespace
 */
inline int firstNonvisible(const std::string &input, unsigned short int max=4096)
{
    if (max > input.length())
        max = (unsigned short)input.length();

    for (unsigned short i = 0; i < max; i++)
        if (!isVisible(input[i]))
            return i;

    return -1;
}


/** utility method that returns the position of the
 * first alphabetic character from a string
 */
inline int firstAlphabetic(const std::string &input, unsigned short int max=4096)
{
    if (max > input.length())
        max = (unsigned short)input.length();

    for (unsigned short i = 0; i < max; i++)
        if (isAlphabetic(input[i]))
            return i;

    return -1;
}


/** utility method that returns the position of the
 * first printable character from a string
 */
inline int firstNonalphabetic(const std::string &input, unsigned short int max=4096)
{
    if (max > input.length())
        max = (unsigned short)input.length();

    for (unsigned short i = 0; i < max; i++)
        if (!isAlphabetic(input[i]))
            return i;

    return -1;
}

/** integer to string
 */
inline std::string itoa(int value, const char* fmt = "%i")
{
    char buf[64];
    snprintf(buf, sizeof(buf), fmt, value);
    return std::string(buf);
}

/** url-encodes a string
 */
std::string url_encode(const std::string &text);

/** url-decodes a string
*/
std::string url_decode(const std::string &text);

/** octal-encode nonprintable characters in a string
 *  the quotechar parameter will always be encoded; '"' is a sensible value
 */
std::string escape_nonprintable(const std::string &text, const char quotechar = '\\');

/** escape a string
 */
std::string escape(const std::string &text, char escaper);

/** un-escape a string
 */
std::string unescape(const std::string &text, char escaper);

/** lookup for an un-escaped separator
 */
int unescape_lookup(const std::string &text, char escaper, char sep);

/** return a copy of a string, truncated to specified length,
 *  make last char a '~' if truncation took place
 */
std::string str_trunc_continued (const std::string &text, int len);

/** find the first instance of a substring,
*/
size_t find_first_substr(const std::string &findin, const std::string &findwhat, size_t offset = 0);
}


#endif // __TEXTUTILS_H__


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