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serde::{de, Deserialize, Deserializer}; +use std::{ + error::Error, + fs, + path::{Path, PathBuf}, +}; +use toml::value::Datetime; + +#[derive(Parser)] +#[command(version, about, long_about = None)] +struct Cli { + /// Sunrise file + file: PathBuf, +} + +#[derive(Deserialize, Debug)] +struct Sunrise { + /// Sorted array of Timetables + schedule: Vec, +} + +#[derive(Deserialize, Debug)] +struct Timetable { + /// Time of day in seconds from 0:00 + #[serde(deserialize_with = "deserialize_seconds")] + time: u32, + image: PathBuf, +} + +impl Sunrise { + fn load_from_file(path: &Path) -> Result> { + let file = fs::read_to_string(path)?; + let mut data: Sunrise = toml::from_str(&file)?; + + data.schedule.sort_by_key(|e| e.time); + + Ok(data) + } + + fn closest_passed_time(&self, current: u32) -> Option<&Timetable> { + let idx = match self + .schedule + .binary_search_by_key(¤t, |time| time.time) + { + Ok(idx) => idx, + Err(idx) => idx, + }; + + if idx > 0 { + return Some(&self.schedule[idx - 1]); // Return the time before the current time + } else if !self.schedule.is_empty() { + return self.schedule.last(); // Wrap around to the last time if current time is before the first time + } else { + return None; // Return None if the times array is empty + } + } +} + +impl Timetable { + fn get_absolute_image_path(&self, config_path: &Path) -> PathBuf { + if self.image.is_absolute() { + return self.image.clone(); + } + + return config_path.join(&self.image); + } +} + +fn deserialize_seconds<'de, D>(deserializer: D) -> Result +where + D: Deserializer<'de>, +{ + let datetime: Datetime = Deserialize::deserialize(deserializer)?; + + match datetime.time { + Some(time) => { + let h: u32 = time.hour.into(); + let m: u32 = time.minute.into(); + let s: u32 = time.second.into(); + + return Ok(h * 3600 + m * 60 + s); + } + + None => return Err(de::Error::custom("Must include a time of day")), + } +} + +fn main() -> Result<(), Box> { + let cli = Cli::parse(); + + let sunrise = Sunrise::load_from_file(&cli.file)?; + + let now = Local::now(); + let sec = now.hour() * 3600 + now.minute() * 60 + now.second(); + + match sunrise.closest_passed_time(sec) { + Some(timetable) => match cli.file.canonicalize()?.parent() { + Some(sunrise_absolute_base) => { + let image = timetable.get_absolute_image_path(&sunrise_absolute_base); + println!("{}", image.to_str().unwrap()); + } + None => { + println!("Failed"); + } + }, + + None => { + println!("Failed"); + } + } + + Ok(()) +}