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//! Contains Serde serializer/deserializer for converting a quantity of seconds
//! in `String` format into a `time::Duration` struct.

use serde::{Deserialize, Deserializer};
use chrono::Duration;

/// This trait converts a quantity of seconds in `String` format into a
/// `time::Duration` struct. The Google Maps Platform returns duration fields in
/// seconds and it's handier to be able to use them as a time::Duration structs.

pub fn seconds_to_duration<'de, D>(deserializer: D) -> Result<Duration, D::Error>
where
    D: Deserializer<'de>,
{
    // Deserialize the field (from a `String`) into an `i64`. This is what the
    // `time::Duration::seconds()` method expects:
    let seconds: i64 = Deserialize::deserialize(deserializer)?;
    // This handy-dandy method converts from the seconds count in `i64` format
    // into a `Duration` struct:
    Ok(Duration::seconds(seconds))
} // fn