From d90c7bc94204a334ebbac691edb9c50c6377cdec Mon Sep 17 00:00:00 2001
From: toge <toge.mail@gmail.com>
Date: Fri, 24 May 2024 20:53:01 +0900
Subject: [PATCH] Please use std::chrono::parse instead of date::parse (#67)

* use std::chrono::parse instead of date::parse

* add REDUCT_CPP_USE_STD_CHRONO option
---
 CMakeLists.txt                       |  1 +
 cmake/InstallDependencies.cmake      | 18 +++++++++++-------
 src/CMakeLists.txt                   |  3 +++
 src/reduct/client.cc                 | 13 +++++++++++++
 src/reduct/internal/serialisation.cc |  8 ++++++++
 5 files changed, 36 insertions(+), 7 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index cda9d1d..9f99897 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,6 +10,7 @@ project(reductcpp VERSION ${REDUCT_CPP_FULL_VERSION})
 message(STATUS "Version ${REDUCT_CPP_FULL_VERSION}")
 
 set(REDUCT_CPP_ENABLE_TESTS OFF CACHE BOOL "Compile tests")
+set(REDUCT_CPP_USE_STD_CHRONO OFF CACHE BOOL "use std::chrono instead of HowardHinnant date library")
 
 set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
diff --git a/cmake/InstallDependencies.cmake b/cmake/InstallDependencies.cmake
index af91360..47e29db 100644
--- a/cmake/InstallDependencies.cmake
+++ b/cmake/InstallDependencies.cmake
@@ -49,12 +49,16 @@ else ()
             URL_HASH MD5=814c5e121b29e37ee836312f0eb0328f
     )
 
-    FetchContent_Declare(
-            date
-            URL https://github.com/HowardHinnant/date/archive/refs/tags/v3.0.1.zip
-            URL_HASH MD5=cf556cc376d15055b8235b05b2fc6253)
-
-    FetchContent_MakeAvailable(fmt nlohmann_json httplib concurrentqueue date)
     add_library(dependencies INTERFACE)
-    target_link_libraries(dependencies INTERFACE fmt nlohmann_json httplib concurrentqueue date)
+    FetchContent_MakeAvailable(fmt nlohmann_json httplib concurrentqueue)
+    target_link_libraries(dependencies INTERFACE fmt nlohmann_json httplib concurrentqueue)
+
+    if(NOT REDUCT_CPP_USE_STD_CHRONO)
+        FetchContent_Declare(
+                date
+                URL https://github.com/HowardHinnant/date/archive/refs/tags/v3.0.1.zip
+                URL_HASH MD5=cf556cc376d15055b8235b05b2fc6253)
+        FetchContent_MakeAvailable(date)
+        target_link_libraries(dependencies INTERFACE date)
+    endif()
 endif ()
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 10a0925..a868531 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -24,6 +24,9 @@ target_include_directories(${CMAKE_PROJECT_NAME} PRIVATE ${CMAKE_CURRENT_SOURCE_
 target_link_libraries(${CMAKE_PROJECT_NAME} PRIVATE dependencies)
 set_target_properties(${CMAKE_PROJECT_NAME} PROPERTIES PUBLIC_HEADER "${PUBLIC_HEADERS}")
 target_compile_definitions(${CMAKE_PROJECT_NAME} PUBLIC CPPHTTPLIB_OPENSSL_SUPPORT)
+if(REDUCT_CPP_USE_STD_CHRONO)
+        target_compile_definitions(${CMAKE_PROJECT_NAME} PRIVATE REDUCT_CPP_USE_STD_CHRONO)
+endif()
 
 include(GNUInstallDirs)
 install(TARGETS ${CMAKE_PROJECT_NAME}
diff --git a/src/reduct/client.cc b/src/reduct/client.cc
index d1bff1e..81e3c2b 100644
--- a/src/reduct/client.cc
+++ b/src/reduct/client.cc
@@ -2,7 +2,11 @@
 
 #include "reduct/client.h"
 
+#ifdef REDUCT_CPP_USE_STD_CHRONO
+#include <chrono>
+#else
 #include <date/date.h>
+#endif
 #include <fmt/core.h>
 #include <nlohmann/json.hpp>
 
@@ -56,8 +60,13 @@ class Client : public IClient {
             .disk_quota = license.at("disk_quota"),
             .fingerprint = license.at("fingerprint"),
         };
+#ifdef REDUCT_CPP_USE_STD_CHRONO
+        std::istringstream(license.at("expiry_date").get<std::string>()) >>
+            std::chrono::parse("%FT%TZ", server_info.license->expiry_date);
+#else
         std::istringstream(license.at("expiry_date").get<std::string>()) >>
             date::parse("%FT%TZ", server_info.license->expiry_date);
+#endif
       }
 
       return {
@@ -142,7 +151,11 @@ class Client : public IClient {
       token_list.reserve(json_tokens.size());
       for (const auto& token : json_tokens) {
         Time created_at;
+#ifdef REDUCT_CPP_USE_STD_CHRONO
+        std::istringstream(token.at("created_at").get<std::string>()) >> std::chrono::parse("%FT%TZ", created_at);
+#else
         std::istringstream(token.at("created_at").get<std::string>()) >> date::parse("%FT%TZ", created_at);
+#endif
 
         token_list.push_back(Token{
             .name = token.at("name"),
diff --git a/src/reduct/internal/serialisation.cc b/src/reduct/internal/serialisation.cc
index 01f19e1..184314c 100644
--- a/src/reduct/internal/serialisation.cc
+++ b/src/reduct/internal/serialisation.cc
@@ -2,7 +2,11 @@
 
 #include "reduct/internal/serialisation.h"
 
+#ifdef REDUCT_CPP_USE_STD_CHRONO
+#include <chrono>
+#else
 #include <date/date.h>
+#endif
 
 namespace reduct::internal {
 
@@ -65,7 +69,11 @@ Result<IBucket::Settings> ParseBucketSettings(const nlohmann::json& json) {
 
 Result<IClient::FullTokenInfo> ParseTokenInfo(const nlohmann::json& json) {
   IClient::Time created_at;
+#ifdef REDUCT_CPP_USE_STD_CHRONO
+  std::istringstream(json.at("created_at").get<std::string>()) >> std::chrono::parse("%FT%TZ", created_at);
+#else
   std::istringstream(json.at("created_at").get<std::string>()) >> date::parse("%FT%TZ", created_at);
+#endif
 
   return {
       IClient::FullTokenInfo{