sion-rs 0.1.1

use super::{Error, Result};
use serde::ser::{self, Serialize};

pub struct Serializer {
    output: String,
}

pub fn to_string<T>(value: &T) -> Result<String>
where
    T: Serialize + ?Sized,
{
    let mut serializer = Serializer {
        output: String::new(),
    };
    value.serialize(&mut serializer)?;
    Ok(serializer.output)
}

impl<'a> ser::Serializer for &'a mut Serializer {
    type Ok = ();
    type Error = Error;

    type SerializeSeq = Self;
    type SerializeTuple = Self;
    type SerializeTupleStruct = Self;
    type SerializeTupleVariant = Self;
    type SerializeMap = Self;
    type SerializeStruct = Self;
    type SerializeStructVariant = Self;

    fn serialize_bool(self, v: bool) -> Result<()> {
        self.output += if v { "true" } else { "false" };
        Ok(())
    }

    fn serialize_i8(self, v: i8) -> Result<()> {
        self.serialize_i64(i64::from(v))
    }
    fn serialize_i16(self, v: i16) -> Result<()> {
        self.serialize_i64(i64::from(v))
    }
    fn serialize_i32(self, v: i32) -> Result<()> {
        self.serialize_i64(i64::from(v))
    }
    fn serialize_i64(self, v: i64) -> Result<()> {
        self.output += &v.to_string();
        Ok(())
    }
    fn serialize_u8(self, v: u8) -> Result<()> {
        self.serialize_i64(i64::from(v))
    }
    fn serialize_u16(self, v: u16) -> Result<()> {
        self.serialize_i64(i64::from(v))
    }
    fn serialize_u32(self, v: u32) -> Result<()> {
        self.serialize_i64(i64::from(v))
    }
    fn serialize_u64(self, v: u64) -> Result<()> {
        self.serialize_i64(v as i64)
    }

    fn serialize_f32(self, v: f32) -> Result<()> {
        self.serialize_f64(f64::from(v))
    }
    fn serialize_f64(self, v: f64) -> Result<()> {
        self.output += &v.to_string();
        Ok(())
    }

    fn serialize_char(self, v: char) -> Result<()> {
        self.output += &v.to_string();
        Ok(())
    }

    // TODO: handle '"' in string
    fn serialize_str(self, v: &str) -> Result<()> {
        self.output += "\"";
        self.output += v;
        self.output += "\"";
        Ok(())
    }

    fn serialize_bytes(self, v: &[u8]) -> Result<()> {
        self.output += ".Data(\"";
        self.output += &::base64::encode(v);
        self.output += "\")";
        Ok(())
    }

    fn serialize_none(self) -> Result<()> {
        self.serialize_unit()
    }

    fn serialize_some<T>(self, value: &T) -> Result<()>
    where
        T: Serialize + ?Sized,
    {
        value.serialize(self)
    }

    fn serialize_unit(self) -> Result<()> {
        self.output += "nil";
        Ok(())
    }

    fn serialize_unit_struct(self, _name: &'static str) -> Result<()> {
        self.serialize_unit()
    }

    fn serialize_unit_variant(
        self,
        _name: &'static str,
        _variant_index: u32,
        variant: &'static str,
    ) -> Result<()> {
        self.serialize_str(variant)
    }

    fn serialize_newtype_struct<T>(self, _name: &'static str, value: &T) -> Result<()>
    where
        T: Serialize + ?Sized,
    {
        value.serialize(self)
    }

    fn serialize_newtype_variant<T>(
        self,
        _name: &'static str,
        _variant_index: u32,
        variant: &'static str,
        value: &T,
    ) -> Result<()>
    where
        T: Serialize + ?Sized,
    {
        self.output += "[";
        variant.serialize(&mut *self)?;
        self.output += ":";
        value.serialize(&mut *self)?;
        self.output += "]";
        Ok(())
    }

    fn serialize_seq(self, _len: Option<usize>) -> Result<Self> {
        self.output += "[";
        Ok(self)
    }

    fn serialize_tuple(self, len: usize) -> Result<Self> {
        self.serialize_seq(Some(len))
    }

    fn serialize_tuple_struct(self, _name: &'static str, len: usize) -> Result<Self> {
        self.serialize_seq(Some(len))
    }

    fn serialize_tuple_variant(
        self,
        _name: &'static str,
        _variant_index: u32,
        variant: &'static str,
        _len: usize,
    ) -> Result<Self> {
        self.output += "[";
        variant.serialize(&mut *self)?;
        self.output += ":";
        Ok(self)
    }

    fn serialize_map(self, _len: Option<usize>) -> Result<Self> {
        self.output += "[";
        Ok(self)
    }

    fn serialize_struct(self, _name: &'static str, len: usize) -> Result<Self> {
        self.serialize_map(Some(len))
    }

    fn serialize_struct_variant(
        self,
        _name: &'static str,
        _variant_index: u32,
        variant: &'static str,
        _len: usize,
    ) -> Result<Self> {
        self.output += "[";
        variant.serialize(&mut *self)?;
        self.output += ":[";
        Ok(self)
    }
}

impl<'a> ser::SerializeSeq for &'a mut Serializer {
    type Ok = ();
    type Error = Error;

    fn serialize_element<T>(&mut self, value: &T) -> Result<()>
    where
        T: Serialize + ?Sized,
    {
        if !self.output.ends_with("[") {
            self.output += ",";
        }
        value.serialize(&mut **self)
    }

    fn end(self) -> Result<()> {
        self.output += "]";
        Ok(())
    }
}

impl<'a> ser::SerializeTuple for &'a mut Serializer {
    type Ok = ();
    type Error = Error;

    fn serialize_element<T>(&mut self, value: &T) -> Result<()>
    where
        T: Serialize + ?Sized,
    {
        if !self.output.ends_with("[") {
            self.output += ",";
        }
        value.serialize(&mut **self)
    }

    fn end(self) -> Result<()> {
        self.output += "]";
        Ok(())
    }
}

impl<'a> ser::SerializeTupleStruct for &'a mut Serializer {
    type Ok = ();
    type Error = Error;

    fn serialize_field<T>(&mut self, value: &T) -> Result<()>
    where
        T: Serialize + ?Sized,
    {
        if !self.output.ends_with("[") {
            self.output += ",";
        }
        value.serialize(&mut **self)
    }

    fn end(self) -> Result<()> {
        self.output += "]]";
        Ok(())
    }
}

impl<'a> ser::SerializeTupleVariant for &'a mut Serializer {
    type Ok = ();
    type Error = Error;

    fn serialize_field<T>(&mut self, value: &T) -> Result<()>
    where
        T: Serialize + ?Sized,
    {
        if !self.output.ends_with("[") {
            self.output += ",";
        }
        value.serialize(&mut **self)
    }

    fn end(self) -> Result<()> {
        self.output += "]";
        Ok(())
    }
}

impl<'a> ser::SerializeMap for &'a mut Serializer {
    type Ok = ();
    type Error = Error;

    fn serialize_key<T>(&mut self, key: &T) -> Result<()>
    where
        T: Serialize + ?Sized,
    {
        if !self.output.ends_with("[") {
            self.output += ",";
        }
        key.serialize(&mut **self)
    }

    fn serialize_value<T>(&mut self, value: &T) -> Result<()>
    where
        T: Serialize + ?Sized,
    {
        self.output += ":";
        value.serialize(&mut **self)
    }

    fn end(self) -> Result<()> {
        if self.output.ends_with("[") {
            self.output += ":";
        }
        self.output += "]";
        Ok(())
    }
}

impl<'a> ser::SerializeStruct for &'a mut Serializer {
    type Ok = ();
    type Error = Error;

    fn serialize_field<T>(&mut self, key: &'static str, value: &T) -> Result<()>
    where
        T: Serialize + ?Sized,
    {
        if !self.output.ends_with("[") {
            self.output += ",";
        }
        key.serialize(&mut **self)?;
        self.output += ":";
        value.serialize(&mut **self)
    }

    fn end(self) -> Result<()> {
        if self.output.ends_with("[") {
            self.output += ":";
        }
        self.output += "]";
        Ok(())
    }
}

impl<'a> ser::SerializeStructVariant for &'a mut Serializer {
    type Ok = ();
    type Error = Error;

    fn serialize_field<T>(&mut self, key: &'static str, value: &T) -> Result<()>
    where
        T: Serialize + ?Sized,
    {
        if !self.output.ends_with("[") {
            self.output += ",";
        }
        key.serialize(&mut **self)?;
        self.output += ":";
        value.serialize(&mut **self)
    }

    fn end(self) -> Result<()> {
        if self.output.ends_with("[") {
            self.output += ":";
        }
        self.output += "]]";
        Ok(())
    }
}