feat: update cJSON and add JSON minification for MTR_LINE_STATION

main/CMakeLists.txt

@@ -1,6 +1,39 @@
-set(requires esp-tls spi_flash nvs_flash esp_event esp_netif esp_http_client esp_wifi)
+set(requires esp-tls spi_flash nvs_flash esp_event esp_netif esp_http_client esp_wifi esp_psram)
 file(GLOB SRCS "main.cpp" "*.cpp" "*.c" "**/*.cpp" "**/*.c")
 
+# Path to the source JSON in this component
+set(ASSETS_SRC_DIR ${CMAKE_CURRENT_LIST_DIR}/../assets)
+set(ASSETS_BINARY_OUTPUT_DIR ${CMAKE_CURRENT_BINARY_DIR}/assets)
+set(MTR_JSON_SRC ${ASSETS_SRC_DIR}/MTR_LINE_STATION.json)
+set(MTR_JSON_HEADER ${ASSETS_BINARY_OUTPUT_DIR}/MTR_LINE_STATION.h)
+set(CUSTOM_CMAKE_MODULES_DIR ${CMAKE_CURRENT_LIST_DIR}/cmake)
+
+## Generate a minified header at configure time using Python
+find_package(Python3 COMPONENTS Interpreter)
+file(MAKE_DIRECTORY ${ASSETS_BINARY_OUTPUT_DIR})
+if (Python3_Interpreter_FOUND)
+    execute_process(
+        COMMAND ${Python3_EXECUTABLE} -c "import json,sys,io; sys.stdout.write(json.dumps(json.load(open(sys.argv[1], 'r', encoding='utf-8')),separators=(',',':')))"
+        "${MTR_JSON_SRC}"
+        RESULT_VARIABLE _mtr_json_minify_result
+        OUTPUT_VARIABLE MTR_JSON_MINIFIED
+        ERROR_VARIABLE _mtr_json_minify_error
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+    )
+    if (_mtr_json_minify_result)
+        message(WARNING "Python minify failed (code=${_mtr_json_minify_result}): ${_mtr_json_minify_error}\nEmbedding original ${MTR_JSON_SRC} instead.")
+        file(READ ${MTR_JSON_SRC} MTR_JSON_MINIFIED)
+    elseif (NOT MTR_JSON_MINIFIED)
+        message(WARNING "Python minified output empty; embedding original ${MTR_JSON_SRC} instead.")
+        file(READ ${MTR_JSON_SRC} MTR_JSON_MINIFIED)
+    endif()
+else()
+    message(WARNING "Python3 not found; embedding original JSON without minification.")
+    file(READ ${MTR_JSON_SRC} MTR_JSON_MINIFIED)
+endif()
+
+file(WRITE ${MTR_JSON_HEADER} "#pragma once\nstatic const char MTR_LINE_STATION_JSON[] = R\"json(${MTR_JSON_MINIFIED})json\";\n")
+
 idf_component_register(SRCS ${SRCS}
-                       PRIV_REQUIRES ${requires}
-                       INCLUDE_DIRS "." "display" "touch" "network" "ui" "io" "common")
+                        PRIV_REQUIRES ${requires}
+                        INCLUDE_DIRS "." "${CMAKE_CURRENT_BINARY_DIR}" "display" "touch" "network" "ui" "io" "common" "external")

main/cmake/write_json_header.cmake

@@ -0,0 +1,20 @@
+if(NOT DEFINED INPUT)
+  message(FATAL_ERROR "write_json_header.cmake: INPUT not defined")
+endif()
+if(NOT DEFINED OUTPUT)
+  message(FATAL_ERROR "write_json_header.cmake: OUTPUT not defined")
+endif()
+
+find_package(Python3 COMPONENTS Interpreter REQUIRED)
+
+execute_process(
+  COMMAND ${Python3_EXECUTABLE} -c "import json,sys;print(json.dumps(json.load(open(sys.argv[1])),separators=(', ',':')) )" ${INPUT}
+  OUTPUT_VARIABLE MINIFIED_JSON
+  OUTPUT_STRIP_TRAILING_WHITESPACE
+)
+
+if(NOT MINIFIED_JSON)
+  message(FATAL_ERROR "write_json_header.cmake: failed to minify ${INPUT}")
+endif()
+
+file(WRITE ${OUTPUT} "#pragma once\nstatic const char MTR_LINE_STATION_JSON[] = R\"json(${MINIFIED_JSON})json\";\n")

main/idf_component.yml

@@ -17,3 +17,4 @@ dependencies:
   lvgl/lvgl: ^9.4.0
   espressif/esp_lcd_touch_gt911: ^1.2.0~1
   espressif/esp_lvgl_port: ^2.7.0
+  espressif/cjson: ^1.7.19