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//! Serde serialization adapter for slog-rs

#![warn(missing_docs)]

#[macro_use]
extern crate slog;
extern crate serde;

use slog::ser;

/// slog-rs's `Serializer` adapter for `serde::Serializer`
///
/// Newtype to wrap serde Serializer, so that `Serialize` can be implemented
/// for it
pub struct SerdeSerializer<'a, S: 'a + serde::Serializer>(pub &'a mut S);

impl<'a, S> slog::ser::Serializer for SerdeSerializer<'a, S>
    where S: 'a + serde::Serializer
{
    fn emit_bool(&mut self, key: &str, val: bool) -> ser::Result<()> {
        serde::Serializer::serialize_map_elt(self.0, key, val)
            .map_err(|_| ser::ErrorKind::Other.into())
    }

    fn emit_unit(&mut self, key: &str) -> ser::Result<()> {
        serde::Serializer::serialize_map_elt(self.0, key, ())
            .map_err(|_| ser::ErrorKind::Other.into())
    }

    fn emit_char(&mut self, key: &str, val: char) -> ser::Result<()> {
        serde::Serializer::serialize_map_elt(self.0, key, val)
            .map_err(|_| ser::ErrorKind::Other.into())
    }

    fn emit_bytes(&mut self, key: &str, val: &[u8]) -> ser::Result<()> {
        serde::Serializer::serialize_map_elt(self.0, key, val)
            .map_err(|_| ser::ErrorKind::Other.into())
    }

    fn emit_none(&mut self, key: &str) -> ser::Result<()> {
        let none: Option<()> = None;
        serde::Serializer::serialize_map_elt(self.0, key, none)
            .map_err(|_| ser::ErrorKind::Other.into())
    }

    fn emit_u8(&mut self, key: &str, val: u8) -> ser::Result<()> {
        serde::Serializer::serialize_map_elt(self.0, key, val)
            .map_err(|_| ser::ErrorKind::Other.into())
    }
    fn emit_i8(&mut self, key: &str, val: i8) -> ser::Result<()> {
        serde::Serializer::serialize_map_elt(self.0, key, val)
            .map_err(|_| ser::ErrorKind::Other.into())
    }
    fn emit_u16(&mut self, key: &str, val: u16) -> ser::Result<()> {
        serde::Serializer::serialize_map_elt(self.0, key, val)
            .map_err(|_| ser::ErrorKind::Other.into())
    }
    fn emit_i16(&mut self, key: &str, val: i16) -> ser::Result<()> {
        serde::Serializer::serialize_map_elt(self.0, key, val)
            .map_err(|_| ser::ErrorKind::Other.into())
    }
    fn emit_usize(&mut self, key: &str, val: usize) -> ser::Result<()> {
        serde::Serializer::serialize_map_elt(self.0, key, val)
            .map_err(|_| ser::ErrorKind::Other.into())
    }
    fn emit_isize(&mut self, key: &str, val: isize) -> ser::Result<()> {
        serde::Serializer::serialize_map_elt(self.0, key, val)
            .map_err(|_| ser::ErrorKind::Other.into())
    }
    fn emit_u32(&mut self, key: &str, val: u32) -> ser::Result<()> {
        serde::Serializer::serialize_map_elt(self.0, key, val)
            .map_err(|_| ser::ErrorKind::Other.into())
    }
    fn emit_i32(&mut self, key: &str, val: i32) -> ser::Result<()> {
        serde::Serializer::serialize_map_elt(self.0, key, val)
            .map_err(|_| ser::ErrorKind::Other.into())
    }
    fn emit_f32(&mut self, key: &str, val: f32) -> ser::Result<()> {
        serde::Serializer::serialize_map_elt(self.0, key, val)
            .map_err(|_| ser::ErrorKind::Other.into())
    }
    fn emit_u64(&mut self, key: &str, val: u64) -> ser::Result<()> {
        serde::Serializer::serialize_map_elt(self.0, key, val)
            .map_err(|_| ser::ErrorKind::Other.into())
    }
    fn emit_i64(&mut self, key: &str, val: i64) -> ser::Result<()> {
        serde::Serializer::serialize_map_elt(self.0, key, val)
            .map_err(|_| ser::ErrorKind::Other.into())
    }
    fn emit_f64(&mut self, key: &str, val: f64) -> ser::Result<()> {
        serde::Serializer::serialize_map_elt(self.0, key, val)
            .map_err(|_| ser::ErrorKind::Other.into())
    }
    fn emit_str(&mut self, key: &str, val: &str) -> ser::Result<()> {
        serde::Serializer::serialize_map_elt(self.0, key, val)
            .map_err(|_| ser::ErrorKind::Other.into())
    }
}