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baketnkandClaude Opus 5.5
59f4f9cff8
Reads the device's own battery from /sys/class/power_supply, skipping peripheral (scope=Device) supplies and implausible values. Offline tested against a fake power_supply tree. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
36 lines
1.3 KiB
C++
36 lines
1.3 KiB
C++
#include "battery.hpp"
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#include <algorithm>
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#include <fstream>
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#include <string>
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#include <system_error>
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#include <vector>
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namespace frameyap {
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namespace {
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std::string first_line(const std::filesystem::path& path) {
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std::ifstream in(path);
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std::string line;
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if (in) std::getline(in, line);
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return line;
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}
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} // namespace
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std::optional<BatteryLevel> system_battery(const std::filesystem::path& root) {
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std::error_code error;
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std::vector<std::filesystem::path> supplies;
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for (const auto& entry : std::filesystem::directory_iterator(root, error)) supplies.push_back(entry.path());
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std::sort(supplies.begin(), supplies.end()); // deterministic choice among several
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for (const auto& supply : supplies) {
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if (first_line(supply / "type") != "Battery" || first_line(supply / "scope") == "Device") continue;
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const auto capacity = first_line(supply / "capacity");
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if (capacity.empty() || capacity.size() > 3 ||
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!std::all_of(capacity.begin(), capacity.end(), [](char c) { return c >= '0' && c <= '9'; }))
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continue;
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const int percent = std::stoi(capacity);
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if (percent > 100) continue;
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return BatteryLevel{percent, first_line(supply / "status") == "Charging"};
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}
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return std::nullopt;
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}
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} // namespace frameyap
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