// function for finding the best keyword from the database
// this function also handles context and also verifies the
// boundaries of keywords that are found inside the user input
void Eliza::find_keyword() {
response_list.clear();
std::string bestKey;
bool bGeneralKey = 0;
int bestPos = -1;
int dbase_size = database.size();
for(int index = 0; index < dbase_size; ++index) {
verify_context(database[index].contexts);
if(good_context()) {
keyword_list = database[index].keywords;
size_t keyNum = keyword_list.size();
for(int i = 0; i < keyNum; ++i) {
std::string thisKey = keyword_list[i];
std::string keyword = thisKey;
trimLR(keyword, "_");
keyword.insert(0, " ");
keyword.append(" ");
if(thisKey == "*" && bestKey == "") {
keyword = m_sInput;
bGeneralKey = 1;
}
int thisPos = m_sInput.find(keyword);
if(thisPos == std::string::npos) {
continue;
}
verify_keyword_boundary(thisKey, thisPos);
if(wrong_boundary()) {
continue;
}
if(bGeneralKey) {
thisKey = "*";
bGeneralKey = 0;
}
trimLR(thisKey, "_");
if(isGoodKey(thisKey, bestKey, thisPos, bestPos)) {
if(thisKey.length() > bestKey.length()) {
response_list = database[index].responses;
} else {
add_response(database[index].responses);
}
bestKey = thisKey;
bestPos = thisPos;
}
}
}
}
bestKey == "*" ? m_sKeyWord = m_sInput : m_sKeyWord = bestKey;
}
// implementing the 'sentence transposition' feature
void TechBot::changePT(std::string &str)
{
std::string buffer = " " + str + " ";
bool bchangePTd = 0;
for(int i = 0; i < transposListSize; ++i)
{
std::string first = transposList[i].first;
std::string second = transposList[i].second;
while(replace(buffer, first, second) != std::string::npos)
{
bchangePTd = 1;
}
}
if( !bchangePTd )
{
for(int i = 0; i < transposListSize; ++i )
{
std::string first = transposList[i].first;
std::string second = transposList[i].second;
while(replace(buffer, second, first) != std::string::npos) ;
}
}
trimLR(buffer, " ");
str = buffer;
}
void Eliza::save_user_name() {
if(m_sKeyWord == "MY NAME IS" || m_sKeyWord == "YOU CAN CALL ME") {
extract_suffix();
m_sUserName = m_sSuffix;
trimLR(m_sUserName, " ");
}
}
void TechBot::RecogniseTopic()
{
TB_Subject.erase(); // resets subject variable
RightClear(TB_Input, " ");
trimLR(TB_KeyWord, "_");
size_t pos = TB_Input.find(TB_KeyWord);
if(pos != std::string::npos)
{
TB_Subject = TB_Input.substr(pos + TB_KeyWord.length() + 1, TB_Input.length() - 1);
}
}
inline void Eliza::extract_suffix() {
int pos = m_sInput.find(m_sKeyWord);
m_sSuffix.erase();
if(pos != std::string::npos) {
if(m_sSymbol == "*") {
pos += m_sKeyWord.length();
m_sSuffix = m_sInput.substr(pos, m_sInput.length() - pos);
} else if(m_sSymbol == "@") {
m_sSuffix = m_sInput.substr(pos, m_sInput.length());
} else if(m_sSymbol == "%") {
m_sSuffix = m_sPrevResponse;
}
trimLR(m_sSuffix, " ");
}
}
