//The old format is = Shelf #<A>, <B>, <C>, <D>, <E> - <F> players, <G> minutes, <H> to learn

public const string

QR_CODE_FORMAT_V1 = "Shelf #{0}, {1}, {2}, {3}, {4} - {5}, {6} minutes, {7} to learn",

QR_CODE_FORMAT_V2 = "?"; //Unfortunately, I don't have the new Format flushed out yet, it will either be the ID or a list of quialities similar to the last.

//I hope to use a generic convert to method, but for now, hardcoding is best.

//public static void convertTo();

//Follows a similiar pattern to searching the database.

public static string BuildQrCodeV1(int shelf = -1, string name = null, string rating = null, string type = null, int minPlayers = -1, int maxPlayers = -1, string Length = null, string difficulty = null){

string code = QR_CODE_FORMAT_V1;

//We could also do string format; which seems like a decent idea.

//We could also just build the string backwards, by insertion, or append to the end of another string... think about it.

return string.Format(code,shelf,name,rating,type,minPlayers,maxPlayers,Length,difficulty);

}

public static bool IsValidQrCodeV1(string code){

string[] search = { "Shelf #",", ",", ",", ",", "," - ",", "," minutes, "," to learn"};

bool[] findNumbers = {true,false,false,false,true,true,false,false};

int

foundAt = -1,

index = 0;

bool failed = false;

do{

int oldFoundAt = foundAt;

foundAt = code.IndexOf(search[index],foundAt+1);

failed = (foundAt == -1) || (index != 0 && oldFoundAt +1 == foundAt);

//If at 0, the shelf should be index 0, so -1 + 1 == 0 would return true, a false alarm

if(index != 0 && !failed){

int start = oldFoundAt + search[index-1].Length;

string stripped = code.Substring(start,foundAt - start);

if(findNumbers[index-1]){

stripped = System.Text.RegularExpressions.Regex.Replace(

stripped,

"[^0-9]",

""

);

}

failed |= stripped.Length == 0;

}

index++;

}while(!failed && index < search.Length);

return !failed;

}

public static QR_CODE_DATA StripQrCodeV1(string code){

int

lastIndex = 0,

nextIndex = 0;

QR_CODE_DATA data = new QR_CODE_DATA ();

//find shelf number

string

lastSearch = "Shelf #",

nextSearch = ", ";

lastIndex = code.IndexOf(lastSearch) + lastSearch.Length; //We want the index at the end of this string

nextIndex = code.IndexOf(nextSearch,lastIndex); //We want the index at the start of this string

if(!int.TryParse(code.Substring(lastIndex,nextIndex - lastIndex),out data.shelf)){

//We will use null and -1 as our defaults.

data.shelf = -1;

}

//fix indexes and find name

lastIndex = nextIndex + nextSearch.Length;

nextSearch = ", ";

nextIndex = code.IndexOf(nextSearch,lastIndex);

data.name = code.Substring(lastIndex,nextIndex - lastIndex);

//fix indexes and find rating

lastIndex = nextIndex + nextSearch.Length;

nextSearch = ", ";

nextIndex = code.IndexOf(nextSearch,lastIndex);

data.rating = code.Substring(lastIndex,nextIndex - lastIndex);

//fix indexes and find type

lastIndex = nextIndex + nextSearch.Length;

nextSearch = ", ";

nextIndex = code.IndexOf(nextSearch,lastIndex);

data.type = code.Substring(lastIndex,nextIndex - lastIndex);

//fix indexes and find minPlayers

lastIndex = nextIndex + nextSearch.Length;

nextSearch = " - ";

nextIndex = code.IndexOf(nextSearch,lastIndex);

if(!int.TryParse(code.Substring(lastIndex,nextIndex - lastIndex),out data.minPlayers)){

//We will use null and -1 as our defaults.

data.minPlayers = -1;

}

//fix indexes and find maxPlayers

lastIndex = nextIndex + nextSearch.Length;

nextSearch = ", ";

nextIndex = code.IndexOf(nextSearch,lastIndex);

if(!int.TryParse(code.Substring(lastIndex,nextIndex - lastIndex),out data.maxPlayers)){

//We will use null and -1 as our defaults.

data.maxPlayers = -1;

}

//fix indexes and find minutes

lastIndex = nextIndex + nextSearch.Length;

nextSearch = " minutes, ";

nextIndex = code.IndexOf(nextSearch,lastIndex);

data.minutes = code.Substring(lastIndex,nextIndex - lastIndex);

//fix indexes and find difficulty

lastIndex = nextIndex + nextSearch.Length;

nextSearch = " to learn";

nextIndex = code.IndexOf(nextSearch,lastIndex);

data.difficulty = code.Substring(lastIndex,nextIndex - lastIndex);

return data;

}

public static bool TryParseQrCodeV1(string code, out QR_CODE_DATA data){

data = new QR_CODE_DATA ();

if (IsValidQrCodeV1 (code)) {

data.Copy(StripQrCodeV1 (code));

return true;

} else {

return false;

}

}

public QR_CODE_DATA(){

Clear ();

}

public int

shelf,

minPlayers,

maxPlayers;

public string

name,

rating,

type,

minutes,

difficulty;

public void Copy(QR_CODE_DATA data){

shelf = data.shelf;

minPlayers = data.minPlayers;

maxPlayers = data.maxPlayers;

name = data.name;

rating = data.rating;

type = data.type;

minutes = data.minutes;

difficulty = data.difficulty;

}

public void Clear(){

shelf = -1;

minPlayers = -1;

maxPlayers = -1;

name = null;

rating = null;

type = null;

minutes = null;

difficulty = null;

}