CMakeLists.txt

@@ -20,8 +20,14 @@ FetchContent_Declare(
   GIT_TAG 1.11.0
   GIT_SHALLOW TRUE
 )
+FetchContent_Declare(
+  glaze
+  GIT_REPOSITORY https://github.com/stephenberry/glaze.git
+  GIT_TAG main
+  GIT_SHALLOW TRUE
+)
 
-FetchContent_MakeAvailable(ctre cpr)
+FetchContent_MakeAvailable(ctre cpr glaze)
 
 add_executable(
         nutri
@@ -30,6 +36,5 @@ add_executable(
         src/Helpers/Utility.cpp
         src/Helpers/Utility.hpp
         src/Helpers/WolframAlpha.hpp
-        src/Helpers/WolframAlpha.cpp)
+      )
-
+target_link_libraries(nutri PRIVATE cpr::cpr nlohmann_json::nlohmann_json ctre::ctre glaze::glaze)
-target_link_libraries(nutri PRIVATE cpr::cpr nlohmann_json::nlohmann_json ctre::ctre)

src/Helpers/WolframAlpha.cpp

@@ -1,51 +0,0 @@
-#include "WolframAlpha.hpp"
-
-#include "Utility.hpp"
-#include <cpr/cpr.h>
-#include <ctre.hpp>
-#include <nlohmann/json.hpp>
-#include <string>
-
-WolframAlpha::WolframAlpha(const std::string& query, double amount) : m_json(fetchJson(query)), m_amount(amount) {}
-
-double WolframAlpha::getCalories() {
-  if (auto match = ctre::search<R"((?<=total calories\s)\d+)">(getPod())) {
-    return std::stod(match.data()) * m_amount;
-  }
-  throw std::runtime_error("Calorie information not found.");
-}
-
-double WolframAlpha::getProtein() {
-  auto        m = ctre::search<"(?<=protein\\s)(\\d+)\\s*(\\w+)">(getPod());
-  double      d = m.get<1>().to_number();
-  std::string u = m.get<2>().to_string();
-  return u == "g" ? d : d / 1000;
-}
-
-double WolframAlpha::getCarbs() {
-  auto        m = ctre::search<"(?<=total carbohydrates\\s)(\\d+)\\s*(\\w+)">(getPod());
-  double      d = m.get<1>().to_number();
-  std::string u = m.get<2>().to_string();
-  return u == "g" ? d : d / 1000;
-}
-
-double WolframAlpha::getFat() {
-  auto        m = ctre::search<"(?<=total fat\\s)(\\d+)\\s*(\\w+)">(getPod());
-  double      d = m.get<1>().to_number();
-  std::string u = m.get<2>().to_string();
-  return u == "g" ? d : d / 1000;
-}
-
-nlohmann::json WolframAlpha::fetchJson(const std::string& query) {
-  const auto    WOLFRAM_KEY = utl::getEnv("NUTRI_WA_KEY");
-  cpr::Response json        = Get(cpr::Url{"https://api.wolframalpha.com/v2/query"},
-                                  cpr::Parameters{{"input", query + "100g nutrition"}, {"appid", WOLFRAM_KEY}, {"output", "JSON"}, {"format", "plaintext"}});
-  return nlohmann::json::parse(json.text);
-}
-
-std::string WolframAlpha::getPod() {
-  return to_string(m_json["queryresult"]["pods"][1]["subpods"][0]["plaintext"]);
-}
-
-nlohmann::json m_json{};
-double         m_amount{};

src/Helpers/WolframAlpha.hpp

@@ -1,21 +1,80 @@
 #pragma once
 
-#include <nlohmann/json.hpp>
+#include "Utility.hpp"
+#include "ctll/fixed_string.hpp"
+#include <cpr/cpr.h>
+#include <ctll.hpp>
+#include <ctre.hpp>
+#include <glaze/glaze.hpp>
+#include <stdexcept>
 #include <string>
 
+// Example regex patern: (?<=protein\s)(\d+)\s(\w)
+
+struct Data {
+  double cals{};
+  double proteins{};
+  double carbs{};
+  double fats{};
+};
+
 class WolframAlpha {
 public:
-  explicit WolframAlpha(const std::string& query, double amount);
+  WolframAlpha(const std::string& query, double amount) : m_plaintext{getData(query)}, m_amount{amount / 100} {}
 
-  double getCalories();
+  //debug
-  double getProtein();
+  std::string getPlain() {
-  double getCarbs();
+    return m_plaintext;
-  double getFat();
+  }
+
+  Data getNutrition() {
+    return m_data;
+  }
 
 private:
-  nlohmann::json fetchJson(const std::string& query);
+  void getMacro() {
-  std::string    getPod();
+    static constexpr ctll::fixed_string calories_regex{R"((?<=total calories\s)\d+)"};
+    static constexpr ctll::fixed_string proteins_regex{R"((?<=protein\s)(\d+)\s(\w))"};
+    static constexpr ctll::fixed_string carbs_regex{R"((?<=total carbohydrates\s)(\d+)\s(\w))"};
+    static constexpr ctll::fixed_string fats_regex{R"((?<=total fat\s)(\d+)\s(\w))"};
 
-  nlohmann::json m_json{};
+    const auto                          convertToGrams = [this](const auto& match, const std::string& unit) -> double {
+      const double value = (unit == "g") ? match.to_number() : match.to_number() / 1000;
+      return value * m_amount;
+    };
+
+    if (auto match = ctre::search<proteins_regex>(m_plaintext); match) {
+      m_data.proteins = convertToGrams(match.get<1>(), match.get<2>().to_string());
+    }
+
+    if (auto match = ctre::search<carbs_regex>(m_plaintext); match) {
+      m_data.carbs = convertToGrams(match.get<1>(), match.get<2>().to_string());
+    }
+
+    if (auto match = ctre::search<fats_regex>(m_plaintext); match) {
+      m_data.fats = convertToGrams(match.get<1>(), match.get<2>().to_string());
+    }
+
+    if (auto match = ctre::search<calories_regex>(m_plaintext); match) {
+      m_data.cals = match.get<0>().to_number();
+    }
+  }
+  std::string getData(const std::string& query) {
+    const auto    WOLFRAM_KEY = utl::getEnv("NUTRI_WA_KEY");
+    cpr::Response response    = Get(cpr::Url{"https://api.wolframalpha.com/v2/query"},
+                                    cpr::Parameters{{"input", query + "100g nutrition"}, {"appid", WOLFRAM_KEY}, {"output", "JSON"}, {"format", "plaintext"}});
+
+    glz::json_t   json{};
+    // Pretty sure this is wrong and i always is false
+    if (glz::read_json(json, response.text)) {
+      throw std::runtime_error("Failed to parse the JSON");
+    } else {
+      return json["queryresult"]["pods"][1]["subpods"][0]["plaintext"].get<std::string>();
+    }
+  }
+
+  Data        m_data{};
+  std::string m_pod{};
+  std::string m_plaintext{};
   double      m_amount{};
 };

src/main.cpp

@@ -1,13 +1,10 @@
 #include "ArgParser.hpp"
 #include "Helpers/WolframAlpha.hpp"
-#include <ctre.hpp>
-#include <nlohmann/json.hpp>
 #include <print>
 
 int main(const int argc, char* argv[]) {
   try {
     ArgParser args;
-    args.addArg("-s", "--source", "Specify the source of the data (Wolfram|OpenFoodFacts)");
     args.addArg("-f", "--food", "Specify the food item");
     args.addArg("-a", "--amount", "Specify the amount (in grams)");
     args.addArg("-h", "--help", "Print help", false);
@@ -16,10 +13,10 @@ int main(const int argc, char* argv[]) {
     const auto   food   = args.get<std::string>("--food");
     const double amount = args.get<double>("--amount") / 100;
 
-    if (!args.has("--source") || args.get<std::string>("--source") == "Wolfram") {
     WolframAlpha wa(food, amount);
-      std::println("Calories: {:.2f} kcal\nProtein: {:.2f} g\nCarbs: {:.2f} g\nFat: {:.2f} g", wa.getCalories(), wa.getProtein(), wa.getCarbs(), wa.getFat());
+
-    }
+    auto         a = wa.getNutrition();
+    std::println("cals: {}\nprotein: {}\ncarbs: {}\nfat: {}", a.cals, a.proteins, a.carbs, a.fats);
 
   } catch (const std::exception& e) {
     std::println(stderr, "Error: {}", e.what());