package String
import NoWurst
import Real

string charset = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
string numberset = "0123456789"
int numbersetlength = numberset.length()
int charsetlength = charset.length()

/** returns the position of the char in the charset
	therefore converting a single char into an int that can
	be converted back to a char with .toCharsetString() */
public function string.toCharsetInt() returns int
	if this.length() > 1
		return -1
	else
		for i = 0 to charsetlength - 1
			if charset.substring(i, i+1) == this
				return i
		return -1

/** Creates an int from a string that only contains numbers (0-9) */
public function string.toInt() returns int
	int result = 0
	int len = this.length()
	for i = len downto 1
		for j = 0 to numbersetlength - 1
			if numberset.substring(j, j+1) == this.substring(i-1, i)
				result += j * (Pow(10, (len - i)*1.).toInt())
				break


	return result

/** Converts an int to the representative char */
public function int.toCharsetString() returns string
	return charset.substring(this, this+1)

/** returns a substring specified by end and start position. */
public function string.substring(int start, int stop) returns string
	return SubString(this, start, stop)

/** Length of the string */
public function string.length() returns int
	return StringLength(this)

/** Returns the char at the given position. 0 = first char */
public function string.charAt(int index) returns string
	return SubString(this, index, index+1)

/**	Converts a string to an ability id */
public function string.toAbilityId() returns int
	return AbilityId(this)

/**	Returns if the given string ends with the specified string.	*/
public function string.endsWith(string s) returns boolean
	int l = this.length()
	return this.substring(l-s.length(), l) == s

/**	Returns if the given string starts with the specified string.	*/
public function string.startsWith(string s) returns boolean
	return this.substring(0, s.length()) == s

/** Returns the string in lowercase letters */
public function string.toLowerCase() returns string
	return StringCase(this, false)

/** Returns the string in uppercase letters */
public function string.toUpperCase() returns string
	return StringCase(this, true)

/** True when string contains only uppercase letters */
function string.isUpper() returns boolean
	return this == StringCase(this,true)

function string.ischar() returns boolean
	return S2I(this) == 0 and this != "0"

/** Returns the given string with whitespaces removed */
public function string.trim() returns string
	int i = 0
	while (this.charAt(i) == " ")
		i++
	int j = this.length()
	while (this.charAt(j) == " ")
		j--
	return this.substring(i, j)

/**
	Returns the index of the specified string inside the given string.
	If the string does not exist, the returnvalue is -1
*/
public function string.indexOf(string s) returns int
	for int i = 0 to this.length() - s.length()
		if this.substring(i, i + s.length()) == s
			return i
	return -1

/**
	Returns the index of the specified string inside the given string,
	starting the search at given startposition.
	If the string does not exist, the returnvalue is -1
*/
public function string.indexOf(string s, int startpos) returns int
	for int i = startpos to this.length() - s.length()
		if this.substring(i, i + s.length()) == s
			return i
	return -1

/**
	Returns the last index of the specified string inside the given string,
	If the string does not exist, the returnvalue is -1
*/
public function string.lastIndexOf(string s) returns int
	for int i = this.length() - s.length() downto 0
		if this.substring(i, i + s.length()) == s
			return i
	return -1

/** Returns the occurences of a certain string within a string */
public function string.countOccurences(string findStr) returns int
	int lastIndex = 0
	int count = 0
	while(lastIndex != -1)
		lastIndex = this.indexOf(findStr,lastIndex)

		if( lastIndex != -1)
			count++
			lastIndex+=findStr.length()
	return count

/** True if the string contains the given string */
public function string.contains(string s) returns boolean
	return this.indexOf(s) != -1

/** Returns if the given string is a whitespace (" ",\n,\t,\r) */
public function string.isWhitespace() returns boolean
	return this == " " or this == "\n" or this == "\t" or this == "\r"

/** Returns a new string with first letter is upper */
public function string.firstUpper() returns string
	if (this == "")
		return ""
	return StringCase(this.substring(0, 1), true) + this.substring(1, this.length())

/** Returns a new string in which all occurrences of a specified string in the current instance are replaced with another specified string */
public function string.replace(string oldSubstring, string newSubstring) returns string
	string s = this

	int i = this.indexOf(oldSubstring)
	while (i != -1)
		s = s.substring(0, i) + newSubstring + s.substring(i + oldSubstring.length(), s.length())
		i = s.indexOf(oldSubstring, i + newSubstring.length())
	return s

/** Replaces 1 format item in a specified string with the string representation of a specified object **/
public function string.format(string par1) returns string
	return this.replace("{0}", par1)

/** Replaces 2 format item in a specified string with the string representation of a specified object **/
public function string.format(string par1, string par2) returns string
	return this.replace("{0}", par1)
				.replace("{1}", par2)

/** Replaces 3 format item in a specified string with the string representation of a specified object **/
public function string.format(string par1, string par2, string par3) returns string
	return this.replace("{0}", par1)
				.replace("{1}", par2)
				.replace("{2}", par3)

/** Replaces 4 format item in a specified string with the string representation of a specified object **/
public function string.format(string par1, string par2, string par3, string par4) returns string
	return this.replace("{0}", par1)
				.replace("{1}", par2)
				.replace("{2}", par3)
				.replace("{3}", par4)

/** Replaces 5 format item in a specified string with the string representation of a specified object **/
public function string.format(string par1, string par2, string par3, string par4, string par5) returns string
	return this.replace("{0}", par1)
				.replace("{1}", par2)
				.replace("{2}", par3)
				.replace("{3}", par4)
				.replace("{4}", par5)

/** Replaces 6 format item in a specified string with the string representation of a specified object **/
public function string.format(string par1, string par2, string par3, string par4, string par5, string par6) returns string
	return this.replace("{0}", par1)
				.replace("{1}", par2)
				.replace("{2}", par3)
				.replace("{3}", par4)
				.replace("{4}", par5)
				.replace("{5}", par6)

/** Replaces 7 format item in a specified string with the string representation of a specified object **/
public function string.format(string par1, string par2, string par3, string par4, string par5, string par6, string par7) returns string
	return this.replace("{0}", par1)
				.replace("{1}", par2)
				.replace("{2}", par3)
				.replace("{3}", par4)
				.replace("{4}", par5)
				.replace("{5}", par6)
				.replace("{6}", par7)

/** Replaces 8 format item in a specified string with the string representation of a specified object **/
public function string.format(string par1, string par2, string par3, string par4, string par5, string par6, string par7, string par8) returns string
	return this.replace("{0}", par1)
				.replace("{1}", par2)
				.replace("{2}", par3)
				.replace("{3}", par4)
				.replace("{4}", par5)
				.replace("{5}", par6)
				.replace("{6}", par7)
				.replace("{7}", par8)

/** Replaces 9 format item in a specified string with the string representation of a specified object **/
public function string.format(string par1, string par2, string par3, string par4, string par5, string par6, string par7, string par8, string par9) returns string
	return this.replace("{0}", par1)
				.replace("{1}", par2)
				.replace("{2}", par3)
				.replace("{3}", par4)
				.replace("{4}", par5)
				.replace("{5}", par6)
				.replace("{6}", par7)
				.replace("{7}", par8)
				.replace("{8}", par9)

/** Replaces 10 format item in a specified string with the string representation of a specified object **/
public function string.format(string par1, string par2, string par3, string par4, string par5, string par6, string par7, string par8, string par9, string par10) returns string
	return this.replace("{0}", par1)
				.replace("{1}", par2)
				.replace("{2}", par3)
				.replace("{3}", par4)
				.replace("{4}", par5)
				.replace("{5}", par6)
				.replace("{6}", par7)
				.replace("{7}", par8)
				.replace("{8}", par9)
				.replace("{9}", par10)

public function string.iterator() returns StringIterator
	return new StringIterator(this, 0, this.length())

public class StringIterator
	string s
	int currentpos
	int stringLen

	construct(string s, int currentpos, int stringLen)
		this.s = s
		this.currentpos = currentpos
		this.stringLen = stringLen

	function hasNext() returns boolean
		return currentpos < stringLen

	function next() returns string
		let val = s.substring(currentpos, currentpos+1)
		currentpos++
		return val

	function close()
		destroy this

public class StringLines
	string s
	int currentLine = 0
	int lineCount
	int lastIndex

	construct(string s, int lastIndex, int lineCount)
		this.s = s
		this.lineCount = lineCount
		this.lastIndex = lastIndex

	function iterator() returns thistype
		return this

	function hasNext() returns boolean
		return currentLine < lineCount

	function next() returns string
		let idx = this.lastIndex
		this.lastIndex = this.s.indexOf("\n", idx) + 1
		currentLine++
		return this.s.substring(idx, this.lastIndex)

	function close()
		destroy this


/** Returns a StringLines Object of the given string for iteration */
public function string.toLines() returns StringLines
	return new StringLines(this, 0, this.countOccurences("\n")+1)