public static double ScoreMatches(string txt, string keyword)
{
int numMatches, result;
// find whole word matches
//MK: you can't just put the keyword(s) they searched for straight into a regex - characters need to be escaped first
Regex cleanKeywords = new Regex("([\\[^$.|?*+()])");
var keywordForRegex = cleanKeywords.Replace(keyword, "\\$1");
// MN - todo: escape any bad chars - needs testing
keywordForRegex = Fmt.RegExEscape(keyword);
Regex rx = new Regex("\\b" + keywordForRegex + "\\b", RegexOptions.IgnoreCase);
//var matchArray = new String("" + txt).match(re)
MatchCollection matchArray = rx.Matches(txt);
if (matchArray.Count == 0)
{
numMatches = 0;
}
else
{
numMatches = matchArray.Count; //.VB.length
}
result = 0;
if (numMatches == 0)
{
result += 0;
}
else if (numMatches == 1)
{
result += 5;
}
else if (numMatches == 2)
{
result += 7;
}
else if (numMatches < 5)
{
result += 8;
}
else
{
result += 9;
}
if (numMatches == 0)
{
// find partial word matches
rx = new Regex(keywordForRegex, RegexOptions.IgnoreCase);
//matchArray = new String("" + txt).match(re)
matchArray = rx.Matches(txt);
numMatches = matchArray.Count; //.VB.length
if (numMatches == 0)
{
result += 0;
}
else if (numMatches == 1)
{
result += 1;
}
else if (numMatches == 2)
{
result += 2;
}
else if (numMatches < 5)
{
result += 3;
}
else
{
result += 4;
}
}
return(result);
}