Websocket support (#124)

* Refactor WebSocket client code and add WebSocket support to request handler

* Refactor WebSocket client code and remove unnecessary forward declarations

* Refactor WebSocket client code and add WebSocket support to request handler

* Refactor UI layout and adjust tab stop distance

CMakeLists.txt

@@ -68,6 +68,8 @@ target_link_libraries(${CMAKE_PROJECT_NAME} PRIVATE inja)
 include(cmake/BuildLexbor.cmake)
 target_link_libraries(${CMAKE_PROJECT_NAME} PRIVATE liblexbor_internal)
 
+include(cmake/FetchWebsocketpp.cmake)
+
 target_include_directories(${CMAKE_PROJECT_NAME} PRIVATE vendor/nlohmann-json)
 
 target_sources(
@@ -76,6 +78,7 @@ target_sources(
           src/obs-source-util.cpp
           src/mapping-data.cpp
           src/request-data.cpp
+          src/websocket-client.cpp
           src/ui/CustomTextDocument.cpp
           src/ui/RequestBuilder.cpp
           src/ui/text-render-helper.cpp

cmake/FetchWebsocketpp.cmake

@@ -0,0 +1,57 @@
+if(WIN32 OR APPLE)
+  # Windows and macOS are supported by the prebuilt dependencies
+
+  if(NOT buildspec)
+    file(READ "${CMAKE_SOURCE_DIR}/buildspec.json" buildspec)
+  endif()
+
+  string(
+    JSON
+    version
+    GET
+    ${buildspec}
+    dependencies
+    prebuilt
+    version)
+
+  if(MSVC)
+    set(arch ${CMAKE_GENERATOR_PLATFORM})
+  elseif(APPLE)
+    set(arch universal)
+  endif()
+
+  set(deps_root "${CMAKE_SOURCE_DIR}/.deps/obs-deps-${version}-${arch}")
+  target_include_directories(${CMAKE_PROJECT_NAME} PRIVATE "${deps_root}/include")
+else()
+  # Linux requires fetching the dependencies
+  include(FetchContent)
+
+  FetchContent_Declare(
+    websocketpp
+    URL https://github.com/zaphoyd/websocketpp/archive/refs/tags/0.8.2.tar.gz
+    URL_HASH SHA256=6ce889d85ecdc2d8fa07408d6787e7352510750daa66b5ad44aacb47bea76755)
+
+  # Only download the content, don't configure or build it
+  FetchContent_GetProperties(websocketpp)
+
+  if(NOT websocketpp_POPULATED)
+    FetchContent_Populate(websocketpp)
+  endif()
+
+  # Add WebSocket++ as an interface library
+  add_library(websocketpp INTERFACE)
+  target_include_directories(websocketpp INTERFACE ${websocketpp_SOURCE_DIR})
+
+  # Fetch ASIO
+  FetchContent_Declare(
+    asio
+    URL https://github.com/chriskohlhoff/asio/archive/asio-1-28-0.tar.gz
+    URL_HASH SHA256=226438b0798099ad2a202563a83571ce06dd13b570d8fded4840dbc1f97fa328)
+
+  FetchContent_MakeAvailable(websocketpp asio)
+
+  target_link_libraries(${CMAKE_PROJECT_NAME} PRIVATE websocketpp)
+  target_include_directories(${CMAKE_PROJECT_NAME} PRIVATE ${asio_SOURCE_DIR}/asio/include/)
+endif()
+
+message(STATUS "WebSocket++ and ASIO have been added to the project")