Generate qt jsonrpc bindings

CMakeLists.txt

@@ -2,45 +2,51 @@ cmake_minimum_required(VERSION 3.16)
 project(deltachat LANGUAGES C)
 include(GNUInstallDirs)
 
+option(WITH_JSONRPC_BINDINGS "Generate jsonrpc bindings" OFF)
+
 find_program(CARGO cargo)
 
 if(APPLE)
-       set(DYNAMIC_EXT "dylib")
+  set(DYNAMIC_EXT "dylib")
 elseif(UNIX)
-       set(DYNAMIC_EXT "so")
+  set(DYNAMIC_EXT "so")
 else()
-       set(DYNAMIC_EXT "dll")
+  set(DYNAMIC_EXT "dll")
 endif()
 
 if(DEFINED ENV{CARGO_BUILD_TARGET})
-    set(ARCH_DIR "$ENV{CARGO_BUILD_TARGET}")
+  set(CARGO_OUT_DIR "${CMAKE_BINARY_DIR}/target/$ENV{CARGO_BUILD_TARGET}/release")
 else()
-    set(ARCH_DIR "./")
+  set(CARGO_OUT_DIR "${CMAKE_BINARY_DIR}/target/release")
 endif()
 
-add_custom_command(
-	OUTPUT
-	"${CMAKE_BINARY_DIR}/target/release/libdeltachat.a"
-	"${CMAKE_BINARY_DIR}/target/release/libdeltachat.${DYNAMIC_EXT}"
-	"${CMAKE_BINARY_DIR}/target/release/pkgconfig/deltachat.pc"
-        COMMAND
-        PREFIX=${CMAKE_INSTALL_PREFIX}
-        LIBDIR=${CMAKE_INSTALL_FULL_LIBDIR}
-        INCLUDEDIR=${CMAKE_INSTALL_FULL_INCLUDEDIR}
-	${CARGO} build --target-dir=${CMAKE_BINARY_DIR}/target --release
-	WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/deltachat-ffi
-)
+if(WITH_JSONRPC_BINDINGS)
+  set(JSONRPC_ARGS --package deltachat-jsonrpc-bindings)
+endif()
 
 add_custom_target(
-	lib_deltachat
-	ALL
-	DEPENDS
-	"${CMAKE_BINARY_DIR}/target/release/libdeltachat.a"
-	"${CMAKE_BINARY_DIR}/target/release/libdeltachat.${DYNAMIC_EXT}"
-	"${CMAKE_BINARY_DIR}/target/release/pkgconfig/deltachat.pc"
+  lib_deltachat
+  ALL
+  COMMAND
+    ${CMAKE_COMMAND} -E env
+    CARGO_TARGET_DIR="${CMAKE_BINARY_DIR}/target"
+    PREFIX="${CMAKE_INSTALL_PREFIX}"
+    LIBDIR="${CMAKE_INSTALL_FULL_LIBDIR}"
+    INCLUDEDIR="${CMAKE_INSTALL_FULL_INCLUDEDIR}"
+    ${CARGO} build --release --package deltachat_ffi ${JSONRPC_ARGS}
+  WORKING_DIRECTORY
+    "${CMAKE_CURRENT_SOURCE_DIR}"
 )
 
-install(FILES "deltachat-ffi/deltachat.h" DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
-install(FILES "${CMAKE_BINARY_DIR}/target/${ARCH_DIR}/release/libdeltachat.a" DESTINATION ${CMAKE_INSTALL_LIBDIR})
-install(FILES "${CMAKE_BINARY_DIR}/target/${ARCH_DIR}/release/libdeltachat.${DYNAMIC_EXT}" DESTINATION ${CMAKE_INSTALL_LIBDIR})
-install(FILES "${CMAKE_BINARY_DIR}/target/${ARCH_DIR}/release/pkgconfig/deltachat.pc" DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
+install(FILES "deltachat-ffi/deltachat.h" DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}")
+install(FILES "${CARGO_OUT_DIR}/libdeltachat.a" DESTINATION "${CMAKE_INSTALL_LIBDIR}")
+install(FILES "${CARGO_OUT_DIR}/libdeltachat.${DYNAMIC_EXT}" DESTINATION "${CMAKE_INSTALL_LIBDIR}")
+install(FILES "${CARGO_OUT_DIR}/pkgconfig/deltachat.pc" DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
+
+if(WITH_JSONRPC_BINDINGS)
+  set(JSONRPC_HPP "${CMAKE_CURRENT_SOURCE_DIR}/deltachat-jsonrpc-bindings/qt/deltachat-jsonrpc")
+  install(FILES "${JSONRPC_HPP}/generated/types.hpp" "${JSONRPC_HPP}/generated/client.hpp"
+    DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/deltachat-jsonrpc/generated")
+  install(FILES "${JSONRPC_HPP}/cffi_client.hpp"
+    DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/deltachat-jsonrpc")
+endif()

Cargo.toml

@@ -130,6 +130,7 @@ members = [
   "deltachat-ffi",
   "deltachat_derive",
   "deltachat-jsonrpc",
+  "deltachat-jsonrpc-bindings",
   "deltachat-rpc-server",
   "deltachat-ratelimit",
   "deltachat-repl",
@@ -203,7 +204,7 @@ thiserror = "2"
 tokio = "1"
 tokio-util = "0.7.18"
 tracing-subscriber = "0.3"
-yerpc = "0.6.4"
+yerpc = { git="https://github.com/d2weber/yerpc.git", branch="qt_bindings" }
 
 [features]
 default = ["vendored"]

deltachat-jsonrpc-bindings/.gitignore

@@ -0,0 +1 @@
+generated

deltachat-jsonrpc-bindings/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "deltachat-jsonrpc-bindings"
+version = "2.51.0"
+edition = "2024"
+
+[build-dependencies]
+deltachat-jsonrpc = { workspace = true }
+
+[features]
+default = ["vendored"]
+vendored = ["deltachat-jsonrpc/vendored"]

deltachat-jsonrpc-bindings/build.rs

@@ -0,0 +1,6 @@
+use deltachat_jsonrpc::api::{generate_qt_bindings, generate_ts_bindings};
+
+fn main() {
+    generate_ts_bindings();
+    generate_qt_bindings("deltachat");
+}

deltachat-jsonrpc-bindings/qt/deltachat-jsonrpc/cffi_client.hpp

@@ -0,0 +1,104 @@
+#pragma once
+
+#include "deltachat-jsonrpc/generated/types.hpp"
+#include "deltachat-jsonrpc/generated/client.hpp"
+#include "deltachat.h"
+
+#include <cstdint>
+#include <mutex>
+#include <thread>
+
+namespace deltachat {
+
+class CffiTransport : public Transport {
+public:
+    explicit CffiTransport(dc_accounts_t* accounts)
+        : jsonrpc_(dc_jsonrpc_init(accounts))
+    {
+        if (!jsonrpc_) std::abort();
+        thread_ = std::thread([this] { run(); });
+    }
+
+    virtual ~CffiTransport() {
+        done_ = true;
+        // Unblock dc_jsonrpc_next_response by sending a dummy request
+        if (jsonrpc_) dc_jsonrpc_request(jsonrpc_, "{\"jsonrpc\":\"2.0\",\"id\":0,\"method\":\"get_system_info\"}");
+        if (thread_.joinable()) thread_.join();
+        std::lock_guard lk(mu_);
+        for (auto& [id, prom] : pending_) {
+            prom.set_value({{}, "Transport destructed", -32060});
+        }
+        pending_.clear();
+        if (jsonrpc_) dc_jsonrpc_unref(jsonrpc_);
+    }
+
+    virtual std::future<Result<QJsonValue>> send(const QString method, const QJsonValue params) override {
+        uint32_t id = next_id_++;
+        QJsonObject envelope{
+            {"jsonrpc", "2.0"},
+            {"id", static_cast<qint64>(id)},
+            {"method", method},
+            {"params", params},
+        };
+
+        std::promise<Result<QJsonValue>> prom;
+        std::future<Result<QJsonValue>> fut = prom.get_future();
+
+        {
+            std::lock_guard lk(mu_);
+            pending_[id] = std::move(prom);
+        }
+
+        QByteArray json = QJsonDocument(envelope).toJson(QJsonDocument::Compact);
+        dc_jsonrpc_request(jsonrpc_, json.constData());
+        return fut;
+    }
+private:
+    void run() {
+        while (!done_) {
+            char* raw_json = dc_jsonrpc_next_response(jsonrpc_);
+            if (!raw_json) {
+              break;
+            }
+            QByteArray json{raw_json};
+            dc_str_unref(raw_json);
+            if (done_) break;
+
+            QJsonObject obj = QJsonDocument::fromJson(json).object();
+
+            if (!obj["id"].isDouble()) {
+              qCritical() << "No valid rpc id in" << QString{json};
+              continue;
+            }
+            uint32_t id = static_cast<uint32_t>(obj["id"].toInt());
+
+            std::promise<Result<QJsonValue>> prom;
+            {
+                std::lock_guard<std::mutex> lk(mu_);
+                if (auto nh = pending_.extract(id)) {
+                  prom = std::move(nh.mapped());
+                } else {
+                  qCritical() << "Could not map response" << QString{json};
+                  continue;
+                }
+            }
+            prom.set_value(parseResult(obj));
+        }
+    }
+
+private:
+    dc_jsonrpc_instance_t* jsonrpc_;
+    std::thread thread_;
+    std::mutex mu_;
+    std::atomic<uint32_t> next_id_{1};
+    std::atomic<bool> done_{false};
+    std::unordered_map<uint32_t, std::promise<Result<QJsonValue>>> pending_;
+};
+
+class CffiDeltaChat : public RawClient {
+public:
+  explicit CffiDeltaChat(dc_accounts_t* accounts)
+    : RawClient(std::make_unique<CffiTransport>(accounts)) {}
+};
+
+}

deltachat-jsonrpc-bindings/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}

deltachat-jsonrpc/src/api.rs

@@ -157,7 +157,11 @@ impl CommandApi {
     }
 }
 
-#[rpc(all_positional, ts_outdir = "typescript/generated")]
+#[rpc(
+    all_positional,
+    ts_outdir = "typescript/generated",
+    qt_outdir = "qt/deltachat-jsonrpc/generated"
+)]
 impl CommandApi {
     /// Test function.
     async fn sleep(&self, delay: f64) {

flake.nix

@@ -51,6 +51,7 @@
             ./deltachat-contact-tools
             ./deltachat-ffi
             ./deltachat-jsonrpc
+            ./deltachat-jsonrpc-bindings
             ./deltachat-ratelimit
             ./deltachat-repl
             ./deltachat-rpc-client