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#include <chrono>
#include <curl/curl.h>
#include <fstream>
#include <hearthstoneTokenBuilder.hpp>
#include <iostream>
#include <memory>
namespace bnet {
HearthstoneTokenBuilder::HearthstoneTokenBuilder(const std::span<std::string> &iJsonPaths) {
_credentialJsonPaths.append_range(iJsonPaths);
}
HearthstoneTokenBuilder &HearthstoneTokenBuilder::buildToken() {
for (const std::string &aCredentialJsonPath : _credentialJsonPaths) {
std::ifstream aCredentialJsonFile{aCredentialJsonPath};
json aCredentialJson = json::parse(aCredentialJsonFile);
if (isTokenValid(aCredentialJson)) {
_currentToken = std::make_shared<Token>();
_currentToken->setText(aCredentialJson["Token"]["Content"]);
_currentToken->setExpirationTime(
std::chrono::seconds(aCredentialJson["Token"]["ExpirationTime"]));
return *this;
}
}
if (!_allowBattleNetApiCall) {
return *this;
}
for (const std::string &aCredentialJsonPath : _credentialJsonPaths) {
std::ifstream aCredentialJsonFile{aCredentialJsonPath};
json aCredentialJson = json::parse(aCredentialJsonFile);
_currentToken = std::make_shared<Token>(getTokenWithApi(aCredentialJson));
if (_currentToken) {
if (_allowUpdateSourceFile) {
writeTokenToLocalFile(_currentToken, aCredentialJsonPath);
}
break;
}
}
return *this;
}
std::shared_ptr<Token> HearthstoneTokenBuilder::getToken() { return _currentToken; }
HearthstoneTokenBuilder &HearthstoneTokenBuilder::allowBattleNetApiCall() {
_allowBattleNetApiCall = true;
return *this;
}
HearthstoneTokenBuilder &HearthstoneTokenBuilder::allowUpdateSourceFile() {
_allowUpdateSourceFile = true;
return *this;
}
HearthstoneTokenBuilder &HearthstoneTokenBuilder::allowExpiredToken() {
_allowExpiredToken = true;
return *this;
}
bool HearthstoneTokenBuilder::isUpdateSourceFileAllowed() const { return _allowUpdateSourceFile; }
bool HearthstoneTokenBuilder::isTokenValid(const json &iTokenJson) const {
if (not iTokenJson.contains("Token") or not iTokenJson["Token"].contains("ExpirationTime") or
not iTokenJson["Token"].contains("Content")) {
return false;
}
if (iTokenJson["Token"]["Content"].dump().length() < kTOKEN_CONTENT_MIN_LENGTH) {
return false;
}
if (_allowExpiredToken) {
return true;
}
const std::uint64_t kExpirationTime{iTokenJson["Token"]["ExpirationTime"]};
const std::uint64_t kCurrentTime{
static_cast<std::uint64_t>(std::chrono::duration_cast<std::chrono::seconds>(
std::chrono::system_clock::now().time_since_epoch())
.count())};
return kCurrentTime <= kExpirationTime;
}
std::chrono::seconds HearthstoneTokenBuilder::getCurrentTime() const {
return std::chrono::duration_cast<std::chrono::seconds>(
std::chrono::utc_clock::now().time_since_epoch());
}
Token HearthstoneTokenBuilder::getTokenWithApi(const std::string &iCredentialsJsonFilePath) const {
std::ifstream aAgentJsonFile{iCredentialsJsonFilePath};
json aCredentials = json::parse(aAgentJsonFile);
return getTokenWithApi(aCredentials);
}
size_t HearthstoneTokenBuilder::curlCallbackStringOutput(void *iPtr, size_t iSize, size_t iNmemb,
std::string *iUserData) {
size_t newLength{iSize * iNmemb};
try {
iUserData->append(static_cast<char *>(iPtr), newLength);
} catch (std::bad_alloc &e) {
// handle memory problem
return 0;
}
return newLength;
}
Token HearthstoneTokenBuilder::getTokenWithApi(const json &iCredentials) const {
if (not iCredentials.contains("Agent") or not iCredentials["Agent"].contains("Username") or
not iCredentials["Agent"].contains("Password")) {
std::cerr << "Please define Agent/Username and Agent/Password in the "
"JSON credentials file\n";
std::exit(EXIT_FAILURE);
}
const std::string aAgentUsername{iCredentials["Agent"]["Username"]};
const std::string aAgentPassword{iCredentials["Agent"]["Password"]};
CURL *aCurl{curl_easy_init()};
std::string aTokenInfo;
if (aCurl and not aAgentUsername.empty() and not aAgentPassword.empty()) {
curl_easy_setopt(aCurl, CURLOPT_URL, "https://oauth.battle.net/token");
curl_easy_setopt(aCurl, CURLOPT_SSL_VERIFYPEER, 0L);
curl_easy_setopt(aCurl, CURLOPT_SSL_VERIFYHOST, 0L);
curl_easy_setopt(aCurl, CURLOPT_WRITEFUNCTION, curlCallbackStringOutput);
curl_easy_setopt(aCurl, CURLOPT_WRITEDATA, &aTokenInfo);
curl_easy_setopt(aCurl, CURLOPT_USERPWD,
std::format("{}:{}", aAgentUsername, aAgentPassword).data());
curl_easy_setopt(aCurl, CURLOPT_POSTFIELDS, "grant_type=client_credentials");
CURLcode result_code{curl_easy_perform(aCurl)};
curl_easy_cleanup(aCurl);
if (result_code != CURLE_OK) {
std::cerr << "ERROR: token request failed\n";
std::exit(EXIT_FAILURE);
}
}
json aTokenJson = json::parse(aTokenInfo);
return Token{}
.setText(aTokenJson["access_token"])
.setLifetime(std::chrono::seconds{aTokenJson["expires_in"]});
}
void HearthstoneTokenBuilder::writeTokenToLocalFile(std::shared_ptr<Token> &iToken,
const std::string &iTokenFileOutputPath) const {
std::ifstream aTokenFile{iTokenFileOutputPath};
json aCredentialsFile = json::parse(aTokenFile);
aCredentialsFile["Token"]["Content"] = iToken->text();
aCredentialsFile["Token"]["ExpirationTime"] = iToken->expirationTime()->count();
std::ofstream aTokenFileOutput{iTokenFileOutputPath};
aTokenFileOutput << std::setw(4) << aCredentialsFile;
}
} // namespace bnet
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