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#include "postgresHandler.hpp"
#include "hearthstoneAPIHandler.hpp"
#include <cctype>
#include <cstddef>
#include <cstdint>
#include <cstdlib>
#include <iostream>
#include <regex>
#include <stdexcept>
#define KEY_ID 1
// TODO: create a list/array which contains CardTypeHandlerInfo struct objects
// and fill these info in a single function
struct CardTypeHandlerInfo {
std::string aCardType;
std::string aCardRegex;
std::function<const std::string(const std::string &)> aJSONToSQLConverter;
};
const std::map<std::string, std::string> aCardValueTypeToRegex = {
{"INT", "[0-9]+"},
{"STRING", "\"[^\"?]*\""},
{"LIST_OF_INT", "\\[[0-9,]*\\]"},
{"NULL", "null"},
{"BOOL", "true|false"}};
const pqxx::result executeQuery(pqxx::work &aTransaction,
std::string_view aQuery) {
return aTransaction.exec(aQuery);
}
std::ostream &operator<<(std::ostream &aOstream, const pqxx::result &kResult) {
const int kNbColumnsInResult = kResult.columns();
aOstream << "| ";
for (const auto &kResultRow : kResult) {
for (int i = 0; i < kNbColumnsInResult; i++) {
aOstream << kResultRow[i].c_str() << " | ";
}
}
return aOstream;
}
const unsigned int
getTypeIndexOfRegexIterator(const std::sregex_iterator &kSregexIt) {
// TODO: remove hardcoded variable because it is... weird.
// The input should already be the "value" part?
const unsigned int offset = 2;
for (size_t aCardInfoType = 0; aCardInfoType < aCardValueTypeToRegex.size();
aCardInfoType++) {
if ((*kSregexIt)[aCardInfoType] != "") {
return offset + aCardInfoType;
}
}
throw std::invalid_argument("regex iterator input is invalid");
}
const std::string format_json_value_to_sql(const std::string &kTypeOfValue,
const std::string &kValueFromJSON) {
// TODO: show an error if a type is no longer here,
// to avoid having useless conditions
// FIXME: it does not scale well, a bit ugly... should be a single line
if (kTypeOfValue == "BOOL" || kTypeOfValue == "INT") {
return kValueFromJSON;
} else if (kTypeOfValue == "STRING") {
std::string aCopyOfJSONValue = kValueFromJSON;
*aCopyOfJSONValue.begin() = '\'';
*std::prev(aCopyOfJSONValue.end()) = '\'';
return aCopyOfJSONValue;
} else if (kTypeOfValue == "NULL") {
return "NULL";
} else if (kTypeOfValue == "LIST_OF_INT") {
std::string aCopyOfJSONValue = kValueFromJSON;
aCopyOfJSONValue.append("\'");
aCopyOfJSONValue.insert(aCopyOfJSONValue.begin(), '\'');
return aCopyOfJSONValue;
} else {
throw std::invalid_argument("ERROR: type of value is invalid");
}
}
std::string format_key(const std::string &key) {
std::string key_copy(key);
std::stack<size_t> uppercase_indexes;
for (size_t i = 0; i < key.length(); i++) {
if (std::isupper(key[i])) {
uppercase_indexes.push(i);
}
}
while (!uppercase_indexes.empty()) {
size_t top_index = uppercase_indexes.top();
uppercase_indexes.pop();
key_copy[top_index] = std::tolower(key_copy[top_index]);
key_copy.insert(std::next(key_copy.begin(), top_index), '_');
}
return key_copy;
}
static void
add_single_card_to_database(const std::string &t_cards, pqxx::work &t_tx,
const std::regex &key_regex,
const std::string::size_type &id_pos,
const std::string::size_type &closing_bracket_pos) {
auto words_begin = std::sregex_iterator(
std::next(t_cards.begin(), id_pos),
std::next(t_cards.begin(), closing_bracket_pos), key_regex);
auto words_end = std::sregex_iterator();
if (words_begin != words_end) {
std::string insert_columns("INSERT INTO cards (");
std::string values(" VALUES (");
for (std::sregex_iterator kSregexIt = words_begin;
kSregexIt != words_end; ++kSregexIt) {
insert_columns.append(format_key((*kSregexIt)[KEY_ID].str()) +
","); // key
const unsigned int kTypeIndexOfValue =
getTypeIndexOfRegexIterator(kSregexIt);
const std::string kTypeNameOfValue =
std::next(aCardValueTypeToRegex.begin(), kTypeIndexOfValue)
->first;
values.append(
format_json_value_to_sql(
kTypeNameOfValue, (*kSregexIt)[kTypeIndexOfValue].str()) +
",");
}
*std::prev(insert_columns.end()) = ')';
*std::prev(values.end()) = ')';
insert_columns.append(values);
insert_columns.append(" ON CONFLICT (id) DO NOTHING;");
executeQuery(t_tx, insert_columns);
}
}
const std::regex keyValueJSONRegex() {
std::string aRegexString = "\"([^\"?]+)\":(";
for (auto &[fieldName, regex] : aCardValueTypeToRegex) {
aRegexString += "(" + regex + ")|";
}
aRegexString[aRegexString.length() - 1] = ')';
return std::regex(aRegexString);
}
const std::string::size_type
startPosOfCardJSON(const std::string &kCardsPageJSON,
const std::string::size_type kSearchStartPos = 0) {
return kCardsPageJSON.find("{\"id", kSearchStartPos);
}
const std::string::size_type
endPosOfCardJSON(const std::string &kCardsPageJSON,
const std::string::size_type kSearchStartPos = 0) {
return kCardsPageJSON.find("}", kSearchStartPos);
}
void addCardsToDatabase(HearthstoneAPIHandler &aAPIIntermediate,
pqxx::work &aTransaction,
const std::string &kURLOfCardsPage) {
const std::regex aKeyValueJSONRegex = keyValueJSONRegex();
const std::string &kCardsPageJSON =
aAPIIntermediate.get_cards(kURLOfCardsPage);
std::string::size_type aCardStartPos = startPosOfCardJSON(kCardsPageJSON);
std::string::size_type aCardEndPos = endPosOfCardJSON(kCardsPageJSON);
while (aCardStartPos != std::string::npos &&
aCardEndPos != std::string::npos) {
add_single_card_to_database(kCardsPageJSON, aTransaction,
aKeyValueJSONRegex, aCardStartPos,
aCardEndPos);
aCardStartPos = startPosOfCardJSON(kCardsPageJSON, aCardStartPos + 1);
aCardEndPos = endPosOfCardJSON(kCardsPageJSON, aCardEndPos + 1);
}
}
void clearCardDatabase(pqxx::work &tx) {
executeQuery(tx, "DELETE FROM cards");
}
void refresh_cards_table() {
try {
pqxx::connection cx{
"postgresql://aotrix@localhost:5432/hearthstonegameinfo"};
pqxx::work tx{cx};
HearthstoneAPIHandler aAPIIntermediate;
std::string cards =
aAPIIntermediate.get_cards("/?locale=fr_FR&gameMode=constructed");
clearCardDatabase(tx);
addCardsToDatabase(aAPIIntermediate, tx,
"/?locale=fr_FR&gameMode=constructed");
std::regex key_regex("\"pageCount\":([0-9]+)");
auto nb_pages_begin =
std::sregex_iterator(cards.begin(), cards.end(), key_regex);
auto nb_pages_end = std::sregex_iterator();
if (nb_pages_begin != nb_pages_end) {
uint32_t nb_pages = std::stoi((*nb_pages_begin)[1].str());
std::cout << "number of pages: " << nb_pages << std::endl;
// FIXME: [Process exited 139]
// for (int i = 2; i < nb_pages; i++) {
for (uint32_t i = 2; i < 3; i++) {
const std::string kCardsPageURL{std::format(
"/?locale=fr_FR&gameMode=constructed&page={}", i)};
addCardsToDatabase(aAPIIntermediate, tx, kCardsPageURL);
}
}
std::cout << "number of cards in database: "
<< executeQuery(tx, "SELECT COUNT(*) FROM cards")
<< std::endl;
tx.commit();
} catch (pqxx::sql_error const &e) {
std::cerr << "SQL error: " << e.what() << std::endl;
std::cerr << "Query was: " << e.query() << std::endl;
} catch (std::exception const &e) {
std::cerr << "Error: " << e.what() << std::endl;
}
}
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