GEEKING

App/gui/ProfanityFilter.cpp

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+/* Copyright 2003-2005 ROBLOX Corporation, All Rights Reserved */
+#include "stdafx.h"
+
+#include "Network/Player.h"
+#include "Util/Hash.h"
+#include "Util/Color.h"
+#include "Gui/ProfanityFilter.h"
+#include <boost/algorithm/string.hpp>
+#include "v8datamodel/contentprovider.h"
+#include "Util/SafeToLower.h"
+#include "StringConv.h"
+
+namespace RBX {
+
+
+void WordList::decrypt(std::string& str)
+{
+	for(unsigned i = 0; i<str.size(); ++i){
+		str[i] = 0x55 ^ str[i];
+	}
+}
+
+WordList::WordList()
+{
+	/* Load blacklist
+
+	
+	*/
+
+	std::string filename = ContentProvider::getAssetFile("Fonts\\diogenes.fnt");
+	
+	std::ifstream infile(utf8_decode(filename).c_str());
+	std::string line;
+	while( std::getline(infile, line, '\n'))
+	{
+		safeToLower(line);
+		boost::trim(line);
+		if (line.length() > 2){
+			decrypt(line);
+			blacklist.insert(line);
+		}
+	}
+
+	infile.close();
+}
+WordList::~WordList()
+{
+
+}
+bool WordList::ContainsProfanity(std::string str)
+{
+	/*
+	1. Convert query to lower case
+	2. Check for in black list
+	*/
+
+	safeToLower(str);
+
+	return blacklist.find(str) != blacklist.end();
+}
+
+
+ProfanityFilter::ProfanityFilter()
+	: wordlist(0)
+{
+}
+
+ProfanityFilter::~ProfanityFilter()
+{
+	if(wordlist)
+	{
+		delete wordlist;
+		wordlist = 0;
+	}
+}
+
+bool ProfanityFilter::ContainsProfanity(const std::string& str)
+{
+	shared_ptr<ProfanityFilter> instance = getInstance();
+	RBXASSERT(instance->getInitCount() <= 1); // if you hit this, you are using the ScopedSingleton improperly. Save a shared_ptr on a long-lived instance.
+	return instance->ContainsProfanityWorker(str);
+}
+
+
+bool ProfanityFilter::ContainsProfanityWorker(std::string str)
+{
+	/*
+		1. Convert string to lower case
+		2. Break string into testable "words" (a word is a potential entry in the blacklist)
+		3. Test each word
+		4. Return false if any fail, true otherwise
+		
+		TODO - doesn't currently handle bigrams, so bigrams in word list effectively ignored
+	*/
+
+	// You might be thinking "wtf". We don't want to lock if we have a wordlist. We need a check after we get the lock that the wordlist is still NULL.
+	if (wordlist == NULL) 
+	{
+		boost::mutex sync;
+		boost::mutex::scoped_lock lock(sync);
+		if (wordlist == NULL)
+			wordlist = new WordList();
+	}
+
+
+	safeToLower(str);
+
+	std::vector<std::string> words;
+
+	boost::split(words, str, boost::is_any_of(" !.?,:;><[]{}|\\/@#$%^&*()-+=\"")); // TODO: add more delimiters
+
+	for(unsigned int i = 0; i < words.size(); i++)
+	{
+		if (wordlist->ContainsProfanity(words[i])) 
+			return true;
+	}
+
+	return false;
+}
+
+} // namespace
+
+