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#include json::parser::parser() noexcept(true) { return; } json::parser::parser(std::string data) noexcept(false) : input(data) { return; } json::parser::~parser() noexcept(true) { return; } json::object json::parser::load(std::string path) noexcept(false) { std::stringstream buffer; try { std::ifstream file(path); if (!file.is_open()) logger::error("File not found " + path, "json::object json::parser::load(std::string path)"); buffer << file.rdbuf(); file.close(); } catch (std::exception &e) { logger::error("Error reading file: " + path + " - " + e.what(), "json::object json::parser::load(std::string path)"); } catch (...) { logger::error("Error reading file " + path, "json::object json::parser::load(std::string path)"); } return this->loads(buffer.str()); } json::object json::parser::loads(std::string data) noexcept(false) { this->input = data; this->index = 0; this->output.reset(); this->output = this->parseValue(); return this->output; } json::object json::parser::parseValue() noexcept(false) { this->skipWhitespace(); char firstChar = this->getCurrChar(); if (firstChar == 't' || firstChar == 'f' || firstChar == 'n' || firstChar == 'u') return this->parseBooleanNullOrUndefined(); else if (std::isdigit(firstChar)) return this->parseNumber(); else if (firstChar == '"') return this->parseString(); else if (firstChar == '[') return this->parseArray(); else if (firstChar == '{') return this->parseMap(); logger::error("Invalid JSON", "json::object json::parser::parseValue()"); return json::object(); } json::object json::parser::parseBooleanNullOrUndefined() noexcept(false) { std::string keyword = ""; char currChar = this->getCurrChar(); while (isalpha(currChar)) { keyword += currChar; this->index++; currChar = this->getCurrChar(); } if (keyword == "true") return json::object(true); else if (keyword == "false") return json::object(false); else if (keyword == "null") return json::object(nullptr); else if (keyword == "undefined") return json::object(); logger::error("Invalid JSON", "json::object json::parser::parseBooleanNullOrUndefined()"); return json::object(); } json::object json::parser::parseNumber() noexcept(true) { std::string number = ""; char currChar = this->getCurrChar(); bool isInt = true; while (std::isdigit(currChar) || currChar == '.' || currChar == 'e' || currChar == 'E' || currChar == '+' || currChar == '-') { number += currChar; if (currChar == '.') { isInt = false; } this->index++; currChar = this->getCurrChar(); } if (isInt) return json::object(std::stoll(number)); else return json::object(std::stod(number)); } json::object json::parser::parseString() noexcept(true) { std::string value = ""; this->index++; char currChar = this->getCurrChar(); if (currChar != '"') { while (true) { value += currChar; this->index++; currChar = this->getCurrChar(); if (currChar == '"') { if (this->shouldStringBeEscaped()) { break; } } } } this->index++; return json::object(value); } json::object json::parser::parseArray() noexcept(false) { std::vector emptyVector; json::object result(emptyVector); this->index++; char currChar; while (true) { this->skipWhitespace(); currChar = this->getCurrChar(); if (currChar == ']') { this->index++; break; } else if (currChar == ',') { this->index++; continue; } json::object value = this->parseValue(); result.push_back(value); } return result; } json::object json::parser::parseMap() noexcept(false) { std::map<:string json::object> emptyMap; json::object result(emptyMap); this->index++; char currChar; std::string key = ""; while (true) { this->skipWhitespace(); currChar = this->getCurrChar(); if (currChar == '}') { this->index++; break; } else if (currChar == ',') { this->index++; continue; } if (currChar != '"') logger::error("Invalid JSON", "json::object json::parser::parseMap()"); this->index++; currChar = this->getCurrChar(); if (currChar == '"') logger::error("Invalid JSON", "json::object json::parser::parseMap()"); key = ""; while (true) { key += currChar; this->index++; currChar = this->getCurrChar(); if (currChar == '"') { if (this->shouldStringBeEscaped()) { this->index++; break; } } } this->skipWhitespace(); currChar = this->getCurrChar(); if (currChar != ':') logger::error("Invalid JSON", "json::object json::parser::parseMap()"); this->index++; result[key] = this->parseValue(); } return result; } void json::parser::skipWhitespace() noexcept(true) { while (std::isspace(this->input[this->index])) { this->index++; } return; } bool json::parser::shouldStringBeEscaped() noexcept(true) { int backslashes = 0; for (int i = this->index - 1; i >= 0; i--) { if (this->input[i] == '\\') { backslashes++; } else { break; } } if (backslashes % 2 == 0) { return true; } return false; } char json::parser::getPrevChar() noexcept(true) { if (this->index > 0) { return this->input[this->index - 1]; } return '\0'; } char json::parser::getCurrChar() noexcept(true) { if (this->index < this->input.size()) { return this->input[this->index]; } return '\0'; }