binja 0.3.2

use serde::{Serialize, ser};

use crate::{
    config::OptionalStrategy,
    error::{Error, Result},
};

use super::BinarySerializer;

impl serde::ser::Serializer for &mut BinarySerializer {
    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 is_human_readable(&self) -> bool {
        false
    }

    fn serialize_bool(self, v: bool) -> Result<Self::Ok> {
        self.bool(v)
    }

    fn serialize_i8(self, v: i8) -> Result<Self::Ok> {
        self.i8(v)
    }

    fn serialize_i16(self, v: i16) -> Result<Self::Ok> {
        self.i16(v)
    }

    fn serialize_i32(self, v: i32) -> Result<Self::Ok> {
        self.i32(v)
    }

    fn serialize_i64(self, v: i64) -> Result<Self::Ok> {
        self.i64(v)
    }

    fn serialize_i128(self, v: i128) -> Result<Self::Ok> {
        self.i128(v)
    }

    fn serialize_u8(self, v: u8) -> Result<Self::Ok> {
        self.u8(v)
    }

    fn serialize_u16(self, v: u16) -> Result<Self::Ok> {
        self.u16(v)
    }

    fn serialize_u32(self, v: u32) -> Result<Self::Ok> {
        self.u32(v)
    }

    fn serialize_u64(self, v: u64) -> Result<Self::Ok> {
        self.u64(v)
    }

    fn serialize_u128(self, v: u128) -> Result<Self::Ok> {
        self.u128(v)
    }

    fn serialize_f32(self, v: f32) -> Result<Self::Ok> {
        self.f32(v)
    }

    fn serialize_f64(self, v: f64) -> Result<Self::Ok> {
        self.f64(v)
    }

    fn serialize_char(self, v: char) -> Result<Self::Ok> {
        self.char(v)
    }

    fn serialize_str(self, v: &str) -> Result<Self::Ok> {
        self.str(v)
    }

    fn serialize_bytes(self, v: &[u8]) -> Result<Self::Ok> {
        self.bytes(v)
    }

    fn serialize_none(self) -> Result<Self::Ok> {
        if self.config().optional_strategy == OptionalStrategy::Tagged {
            self.u8(0);
        }
        self.check_limit()
    }

    fn serialize_some<T>(self, value: &T) -> Result<Self::Ok>
    where
        T: ?Sized + serde::Serialize,
    {
        if self.config().optional_strategy == OptionalStrategy::Tagged {
            self.u8(1);
        }
        value.serialize(self)
    }
    fn serialize_unit(self) -> Result<Self::Ok> {
        Ok(())
    }

    fn serialize_unit_struct(self, name: &'static str) -> Result<Self::Ok> {
        let _ = name;
        Ok(())
    }

    fn serialize_unit_variant(
        self,
        name: &'static str,
        variant_index: u32,
        variant: &'static str,
    ) -> Result<Self::Ok> {
        let _ = variant;
        let _ = name;
        variant_index.serialize(self)
    }

    fn serialize_newtype_struct<T>(self, name: &'static str, value: &T) -> Result<Self::Ok>
    where
        T: ?Sized + serde::Serialize,
    {
        let _ = name;
        value.serialize(self)
    }

    fn serialize_newtype_variant<T>(
        self,
        name: &'static str,
        variant_index: u32,
        variant: &'static str,
        value: &T,
    ) -> Result<Self::Ok>
    where
        T: ?Sized + serde::Serialize,
    {
        let _ = name;
        let _ = variant;
        self.u32(variant_index)?;
        value.serialize(self)
    }

    fn serialize_seq(self, len: Option<usize>) -> Result<Self::SerializeSeq> {
        if let Some(len) = len {
            self.container_length(len);
        }
        Ok(self)
    }

    fn serialize_tuple(self, len: usize) -> Result<Self::SerializeTuple> {
        let _ = len;
        Ok(self)
    }

    fn serialize_tuple_struct(
        self,
        name: &'static str,
        len: usize,
    ) -> Result<Self::SerializeTupleStruct> {
        let _ = len;
        let _ = name;
        Ok(self)
    }

    fn serialize_tuple_variant(
        self,
        name: &'static str,
        variant_index: u32,
        variant: &'static str,
        len: usize,
    ) -> Result<Self::SerializeTupleVariant> {
        let _ = len;
        let _ = variant;
        let _ = name;
        self.u32(variant_index)?;
        Ok(self)
    }

    fn serialize_map(self, len: Option<usize>) -> Result<Self::SerializeMap> {
        if let Some(len) = len {
            self.container_length(len);
        }
        Ok(self)
    }

    fn serialize_struct(self, name: &'static str, len: usize) -> Result<Self::SerializeStruct> {
        let _ = len;
        let _ = name;
        Ok(self)
    }

    fn serialize_struct_variant(
        self,
        name: &'static str,
        variant_index: u32,
        variant: &'static str,
        len: usize,
    ) -> Result<Self::SerializeStructVariant> {
        let _ = len;
        let _ = variant;
        let _ = name;
        self.u32(variant_index)?;
        Ok(self)
    }
}

// The following 7 impls deal with the serialization of compound types like
// sequences and maps. Serialization of such types is begun by a Serializer
// method and followed by zero or more calls to serialize individual elements of
// the compound type and one call to end the compound type.
//
// This impl is SerializeSeq so these methods are called after `serialize_seq`
// is called on the Serializer.
impl ser::SerializeSeq for &mut BinarySerializer {
    // Must match the `Ok` type of the serializer.
    type Ok = ();
    // Must match the `Error` type of the serializer.
    type Error = Error;

    // Serialize a single element of the sequence.
    fn serialize_element<T>(&mut self, value: &T) -> Result<Self::Ok>
    where
        T: ?Sized + Serialize,
    {
        value.serialize(&mut **self)
    }

    // Close the sequence.
    fn end(self) -> Result<Self::Ok> {
        self.check_limit()
    }
}

// Same thing but for tuples.
impl ser::SerializeTuple for &mut BinarySerializer {
    type Ok = ();
    type Error = Error;

    fn serialize_element<T>(&mut self, value: &T) -> Result<Self::Ok>
    where
        T: ?Sized + Serialize,
    {
        value.serialize(&mut **self)
    }

    fn end(self) -> Result<Self::Ok> {
        self.check_limit()
    }
}

// Same thing but for tuple structs.
impl ser::SerializeTupleStruct for &mut BinarySerializer {
    type Ok = ();
    type Error = Error;

    fn serialize_field<T>(&mut self, value: &T) -> Result<Self::Ok>
    where
        T: ?Sized + Serialize,
    {
        value.serialize(&mut **self)
    }

    fn end(self) -> Result<Self::Ok> {
        self.check_limit()
    }
}

// Tuple variants are a little different. Refer back to the
// `serialize_tuple_variant` method above:
//
//    self.output += "{";
//    variant.serialize(&mut *self)?;
//    self.output += ":[";
//
// So the `end` method in this impl is responsible for closing both the `]` and
// the `}`.
impl ser::SerializeTupleVariant for &mut BinarySerializer {
    type Ok = ();
    type Error = Error;

    fn serialize_field<T>(&mut self, value: &T) -> Result<Self::Ok>
    where
        T: ?Sized + Serialize,
    {
        value.serialize(&mut **self)
    }

    fn end(self) -> Result<Self::Ok> {
        self.check_limit()
    }
}

// Some `Serialize` types are not able to hold a key and value in memory at the
// same time so `SerializeMap` implementations are required to support
// `serialize_key` and `serialize_value` individually.
//
// There is a third optional method on the `SerializeMap` trait. The
// `serialize_entry` method allows serializers to optimize for the case where
// key and value are both available simultaneously. In JSON it doesn't make a
// difference so the default behavior for `serialize_entry` is fine.
impl ser::SerializeMap for &mut BinarySerializer {
    type Ok = ();
    type Error = Error;

    // The Serde data model allows map keys to be any serializable type. JSON
    // only allows string keys so the implementation below will produce invalid
    // JSON if the key serializes as something other than a string.
    //
    // A real JSON serializer would need to validate that map keys are strings.
    // This can be done by using a different Serializer to serialize the key
    // (instead of `&mut **self`) and having that other serializer only
    // implement `serialize_str` and return an error on any other data type.
    fn serialize_key<T>(&mut self, key: &T) -> Result<Self::Ok>
    where
        T: ?Sized + Serialize,
    {
        key.serialize(&mut **self)
    }

    // It doesn't make a difference whether the colon is printed at the end of
    // `serialize_key` or at the beginning of `serialize_value`. In this case
    // the code is a bit simpler having it here.
    fn serialize_value<T>(&mut self, value: &T) -> Result<Self::Ok>
    where
        T: ?Sized + Serialize,
    {
        value.serialize(&mut **self)
    }

    fn end(self) -> Result<Self::Ok> {
        self.check_limit()
    }
}

// Structs are like maps in which the keys are constrained to be compile-time
// constant strings.
impl ser::SerializeStruct for &mut BinarySerializer {
    type Ok = ();
    type Error = Error;

    fn serialize_field<T>(&mut self, _key: &'static str, value: &T) -> Result<Self::Ok>
    where
        T: ?Sized + Serialize,
    {
        value.serialize(&mut **self)
    }

    fn end(self) -> Result<Self::Ok> {
        self.check_limit()
    }
}

// Similar to `SerializeTupleVariant`, here the `end` method is responsible for
// closing both of the curly braces opened by `serialize_struct_variant`.
impl ser::SerializeStructVariant for &mut BinarySerializer {
    type Ok = ();
    type Error = Error;

    fn serialize_field<T>(&mut self, key: &'static str, value: &T) -> Result<Self::Ok>
    where
        T: ?Sized + Serialize,
    {
        let _ = key;
        value.serialize(&mut **self)
    }

    fn end(self) -> Result<Self::Ok> {
        self.check_limit()
    }
}