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use std::fs;
use std::path;
use std::time;
use crate::utils::*;
#[derive(Clone, Copy)]
pub enum ChargingState {
Charging,
Discharging,
Full,
}
pub struct BatteryInfo {
pub name: String,
pub remaining_capacity: u32,
pub present_rate: u32,
pub voltage: u32,
pub design_capacity: u32,
pub last_capacity: u32,
pub time_remaining: time::Duration,
pub percentage: f32,
pub state: ChargingState,
}
pub fn get_battery_info(path: &path::Path) -> Result<Vec<BatteryInfo>, AcpiClientError> {
let mut results: Vec<BatteryInfo> = vec![];
for entry in fs::read_dir(&path)? {
let path = entry?.path();
if determine_is_battery(parse_entry_file(&path.join("type"))?) {
let ps = BatteryInfo::new(&path);
if ps.is_ok() {
results.push(ps?);
}
}
}
Ok(results)
}
impl BatteryInfo {
pub fn new(path: &path::Path) -> Result<BatteryInfo, AcpiClientError> {
match determine_reporting_type(&path)? {
ReportType::Capacity => return parse_capacity_supply(&path),
ReportType::Energy => return parse_energy_supply(&path),
}
}
}
fn parse_capacity_supply(path: &path::Path) -> Result<BatteryInfo, AcpiClientError> {
let voltage = parse_file_to_i32(&path.join("voltage_now"), 1000)? as u32;
let remaining_capacity = parse_file_to_i32(&path.join("charge_now"), 1000)? as u32;
let present_rate = parse_file_to_i32(&path.join("current_now"), 1000)? as u32;
let design_capacity = parse_file_to_i32(&path.join("charge_full_design"), 1000)? as u32;
let last_capacity = parse_file_to_i32(&path.join("charge_full"), 1000)? as u32;
let state = parse_state_from_str(
parse_entry_file(&path.join("status"))?
.trim()
.to_lowercase(),
)?;
let percentage = determine_charge_percentage(remaining_capacity, last_capacity);
let time_remaining =
determine_time_to_state_change(remaining_capacity, last_capacity, present_rate, state);
let name = get_device_name(path)?;
Ok(BatteryInfo {
name,
remaining_capacity: remaining_capacity,
present_rate: present_rate,
voltage: voltage,
design_capacity: design_capacity,
last_capacity: last_capacity,
percentage,
time_remaining,
state: state,
})
}
fn parse_energy_supply(path: &path::Path) -> Result<BatteryInfo, AcpiClientError> {
let voltage = parse_file_to_i32(&path.join("voltage_now"), 1000)? as u32;
let remaining_capacity = parse_file_to_i32(&path.join("energy_now"), 1000)? as u32 / voltage;
let present_rate = parse_file_to_i32(&path.join("current_now"), 1000)? as u32;
let design_capacity =
parse_file_to_i32(&path.join("energy_full_design"), 1000)? as u32 / voltage;
let last_capacity = parse_file_to_i32(&path.join("energy_full"), 1000)? as u32 / voltage;
let state = parse_state_from_str(
parse_entry_file(&path.join("status"))?
.trim()
.to_lowercase(),
)?;
let percentage = determine_charge_percentage(remaining_capacity, last_capacity);
let time_remaining =
determine_time_to_state_change(remaining_capacity, last_capacity, present_rate, state);
let name = get_device_name(path)?;
Ok(BatteryInfo {
name,
remaining_capacity,
present_rate,
voltage,
design_capacity,
last_capacity,
percentage,
time_remaining,
state,
})
}
fn determine_charge_percentage(remaining_capacity: u32, full_capacity: u32) -> f32 {
(remaining_capacity as f32) * 100.0 / (full_capacity as f32)
}
fn determine_time_to_state_change(
remaining_capacity: u32,
full_capacity: u32,
present_rate: u32,
state: ChargingState,
) -> time::Duration {
match state {
ChargingState::Charging => {
let seconds = (3600 * (full_capacity - remaining_capacity) / (present_rate + 1)) as u64;
time::Duration::new(seconds, 0)
}
ChargingState::Discharging => {
let seconds = (3600 * remaining_capacity / (present_rate + 1)) as u64;
time::Duration::new(seconds, 0)
}
_ => time::Duration::new(0, 0),
}
}
fn parse_state_from_str(state_str: String) -> Result<ChargingState, AcpiClientError> {
if state_str == "charging" {
Ok(ChargingState::Charging)
} else if state_str == "discharging" {
Ok(ChargingState::Discharging)
} else if state_str == "full" {
Ok(ChargingState::Full)
} else {
Err(AcpiClientError::InvalidInput(std::io::Error::new(
std::io::ErrorKind::Other,
format!("Unrecognized charging state: {}", state_str),
)))
}
}
#[derive(Clone)]
enum ReportType {
Capacity,
Energy,
}
fn determine_reporting_type(path: &path::Path) -> Result<ReportType, AcpiClientError> {
let capacity_files = vec!["charge_now", "charge_full", "charge_full_design"];
let energy_files = vec!["energy_now", "energy_full", "energy_full_design"];
if capacity_files.iter().all(|file| {
let mut path_buffer = path::Path::new(path).to_path_buf();
path_buffer.push(file);
path_buffer.exists()
}) {
Ok(ReportType::Capacity)
} else if energy_files.iter().all(|file| {
let mut path_buffer = path::Path::new(path).to_path_buf();
path_buffer.push(file);
path_buffer.exists()
}) {
Ok(ReportType::Energy)
} else {
Err(AcpiClientError::InvalidInput(std::io::Error::new(
std::io::ErrorKind::Other,
"Unrecognized reporting type.",
)))
}
}