d398a6ced2
- CitrineOS core extracted (CSMS OCPP 2.0.1) - OpenOCPP extracted (firmware OCPP 1.6J/2.0.1) - ShapeShifter library installed (pip install -e) - ShapeShifter specification extracted - EVerest extracted TODO updated with progress
74 lines
2.3 KiB
C++
74 lines
2.3 KiB
C++
#ifndef CHARGELAB_OPEN_FIRMWARE_JSON_FILE_H
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#define CHARGELAB_OPEN_FIRMWARE_JSON_FILE_H
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#include <optional>
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#include <string>
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#include "openocpp/helpers/json.h"
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#include "logging.h"
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namespace chargelab {
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class JsonFile {
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static constexpr int kMaxFileDumpSize = 10*1000;
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public:
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template<class T>
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static std::optional<T> loadFile(std::string const& file_name) {
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auto file_content = readTextFile(file_name.c_str());
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if (file_content) {
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return read_json_from_string<T>(file_content);
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}
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return std::nullopt;
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}
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template<class T>
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static bool saveProfiles(std::string const& file_name, T const & content) {
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FILE* file = fopen(file_name.c_str(), "w");
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if (file == nullptr) {
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CHARGELAB_LOG_MESSAGE(error) << "Failed to open file for writing: " << file_name;
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return false;
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}
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auto const json_string = write_json_to_string(content);
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if (!json_string.has_value()) {
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CHARGELAB_LOG_MESSAGE(error) << "Failed serializing JSON content";
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return false;
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}
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if (fwrite(json_string->data(), 1, json_string->size(), file) < json_string.size()) {
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fclose(file);
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CHARGELAB_LOG_MESSAGE(error) << "Failed to write file: " << file_name;
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return false;
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}
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fclose(file);
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return true;
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}
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private:
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static std::optional<std::string> readTextFile(const char* file_name) {
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FILE* file = fopen(file_name, "r");
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if (file == nullptr) {
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CHARGELAB_LOG_MESSAGE(debug) << "file doesn't exist:" << file_name;
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return std::nullopt;
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}
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fseek(file, 0, SEEK_END);
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size_t file_size = ftell(file);
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fseek(file, 0, SEEK_SET);
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std::string text;
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text.resize(file_size);
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if (fread(text.data(), 1, file_size, file) != file_size) {
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fclose(file);
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CHARGELAB_LOG_MESSAGE(error) << "Failed reading file:" << file_name << " file size:" << file_size;
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return std::nullopt;
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}
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fclose(file);
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return text;
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}
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};
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}
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#endif //CHARGELAB_OPEN_FIRMWARE_JSON_FILE_H
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