Ken Van Hoeylandt
77 lines
2.8 KiB
C++
77 lines
2.8 KiB
C++
#include "Tactility/file/PropertiesFile.h"
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#include <Tactility/StringUtils.h>
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#include <Tactility/file/File.h>
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#include <Tactility/file/FileLock.h>
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#include <tactility/log.h>
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namespace tt::file {
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constexpr auto* TAG = "PropertiesFile";
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bool getKeyValuePair(const std::string& input, std::string& key, std::string& value) {
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auto index = input.find('=');
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if (index == std::string::npos) {
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return false;
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}
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key = input.substr(0, index);
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value = input.substr(index + 1);
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return true;
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}
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bool loadPropertiesFile(const std::string& filePath, std::function<void(const std::string& key, const std::string& value)> callback) {
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// Reading properties is a common operation; make this debug-level to avoid
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// flooding the serial console under frequent polling.
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LOG_D(TAG, "Reading properties file %s", filePath.c_str());
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uint16_t line_count = 0;
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std::string key_prefix = "";
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// Malformed lines are skipped, valid lines are loaded and callback is called
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return readLines(filePath, true, [&key_prefix, &line_count, &filePath, &callback](const std::string& line) {
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line_count++;
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std::string key, value;
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// Trim all whitespace including \r\n (Windows line endings)
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auto trimmed_line = string::trim(line, " \t\r\n");
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if (!trimmed_line.starts_with("#") && !trimmed_line.empty()) {
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if (trimmed_line.starts_with("[")) {
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key_prefix = trimmed_line;
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} else {
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if (getKeyValuePair(trimmed_line, key, value)) {
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std::string trimmed_key = key_prefix + string::trim(key, " \t");
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std::string trimmed_value = string::trim(value, " \t");
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callback(trimmed_key, trimmed_value);
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} else {
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LOG_E(TAG, "Failed to parse line %d of %s (skipped)", line_count, filePath.c_str());
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// Continue loading other lines
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}
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}
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}
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});
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}
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bool loadPropertiesFile(const std::string& filePath, std::map<std::string, std::string>& outProperties) {
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return loadPropertiesFile(filePath, [&outProperties](const std::string& key, const std::string& value) {
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outProperties[key] = value;
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});
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}
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bool savePropertiesFile(const std::string& filePath, const std::map<std::string, std::string>& properties) {
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bool result = false;
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getLock(filePath)->withLock([&result, filePath, &properties] {
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LOG_I(TAG, "Saving properties file %s", filePath.c_str());
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FILE* file = fopen(filePath.c_str(), "w");
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if (file == nullptr) {
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LOG_E(TAG, "Failed to open %s", filePath.c_str());
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return;
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}
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for (const auto& [key, value]: properties) { fprintf(file, "%s=%s\n", key.c_str(), value.c_str()); }
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fclose(file);
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result = true;
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});
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return result;
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}
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}
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