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//! The module describes DB and playback statistics
use crate::convert::FromIter;
use crate::error::Error;
use rustc_serialize::{Encodable, Encoder};
use std::time::Duration;
/// DB and playback statistics
#[derive(Debug, Clone, Copy, PartialEq)]
pub struct Stats {
/// number of artists in DB
pub artists: u32,
/// number of albums in DB
pub albums: u32,
/// number of songs in DB
pub songs: u32,
/// total MPD uptime, seconds resolution
pub uptime: Duration,
/// total playback time, seconds resolution
pub playtime: Duration,
/// total playback time for all songs in DB, seconds resolution
pub db_playtime: Duration,
/// last DB update timestamp in seconds since Epoch, seconds resolution
pub db_update: Duration,
}
impl Encodable for Stats {
fn encode<S: Encoder>(&self, e: &mut S) -> Result<(), S::Error> {
e.emit_struct("Stats", 7, |e| {
e.emit_struct_field("artists", 0, |e| self.artists.encode(e))?;
e.emit_struct_field("albums", 1, |e| self.albums.encode(e))?;
e.emit_struct_field("songs", 2, |e| self.songs.encode(e))?;
e.emit_struct_field("uptime", 3, |e| self.uptime.as_secs().encode(e))?;
e.emit_struct_field("playtime", 4, |e| self.playtime.as_secs().encode(e))?;
e.emit_struct_field("db_playtime", 5, |e| self.db_playtime.as_secs().encode(e))?;
e.emit_struct_field("db_update", 6, |e| self.db_update.as_secs().encode(e))?;
Ok(())
})
}
}
impl Default for Stats {
fn default() -> Stats {
Stats {
artists: 0,
albums: 0,
songs: 0,
uptime: Duration::from_secs(0),
playtime: Duration::from_secs(0),
db_playtime: Duration::from_secs(0),
db_update: Duration::from_secs(0),
}
}
}
impl FromIter for Stats {
/// build stats from iterator
fn from_iter<I: Iterator<Item = Result<(String, String), Error>>>(iter: I) -> Result<Stats, Error> {
let mut result = Stats::default();
for res in iter {
let line = res?;
match &*line.0 {
"artists" => result.artists = line.1.parse()?,
"albums" => result.albums = line.1.parse()?,
"songs" => result.songs = line.1.parse()?,
"uptime" => result.uptime = Duration::from_secs(line.1.parse()?),
"playtime" => result.playtime = Duration::from_secs(line.1.parse()?),
"db_playtime" => result.db_playtime = Duration::from_secs(line.1.parse()?),
"db_update" => result.db_update = Duration::from_secs(line.1.parse()?),
_ => (),
}
}
Ok(result)
}
}
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