Matching exact match in a string

Question

I need to perform a keyword search in a string that exact match.

EmailTemplate et = [SELECT Id htmlValue FROM EmailTemplate where Name = 'Welcome Email'];

string htmlValue = et.htmlValue; 

string s1 = 'Hello there {!Contact.Name},';
string s2 = 'Did you know {!Contact.Deal} this is a test?';

static Boolean keywordSearch(String input, String keywordPhrase)
{
    return Pattern.compile('(?i)\\b' + keywordPhrase + '\\b').matcher(input).find();
}

system.assert(keywordSearch(htmlValue, s1));

I want to match exact like word to word except the case sensitive, I have tried using contains or equals but that does not work word to word, if I skip ? which is in string s2 and use contains it does pass the assert which is suppose to get failed

Answer 1

Two issues that I see...

1. Your search phrases include special characters in Regex, so you should use Pattern.quote() to account for that
2. Not convinced that you should really be using \b to find a word boundary. You can probably just get rid of that part.

So, I would write it like this:

string htmlValue = 'blah hello there {!Contact.Name}, blah';

string s1 = 'Hello there {!Contact.Name},';
string s2 = 'Did you know {!Contact.Deal} this is a test?';

static Boolean keywordSearch(String input, String keywordPhrase)
{
    return Pattern.compile('(?i)' + Pattern.quote(keywordPhrase)).matcher(input).find();
}

system.debug(keywordSearch(htmlValue, s1));