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use super::{FieldSeg, KeywordsEscaper, LeadingCommaType, SingleFieldMapper};
use crate::FieldDef;
use proc_macro2::TokenStream;
use std::borrow::Cow;
use crate::field_mapper::base::LeadingCommaType::Leading;
use crate::field_mapper::base::single_field_mapper::ConnectOp;
pub trait MultiFieldMapper: SingleFieldMapper {
fn map_to_stream<'a, T>(
&self,
fields: T,
escaper: &dyn KeywordsEscaper,
indexed: bool,
leading_comma_type: LeadingCommaType,
connect_op: ConnectOp,
is_enum: bool,
) -> TokenStream
where
T: IntoIterator<Item = &'a FieldDef<'a>>,
{
let segments = if indexed {
MultiFieldMapper::map_static_indexed_fields(self, fields, escaper)
} else {
MultiFieldMapper::map_static_fields(self, fields, escaper)
};
// treat as not indexed segment
FieldSeg::from_seg(segments, false).translate(leading_comma_type, connect_op, false, is_enum)
}
fn map_static_fields<'a, T>(&self, fields: T, escaper: &dyn KeywordsEscaper) -> Cow<'a, str>
where
T: IntoIterator<Item = &'a FieldDef<'a>>,
{
let s = fields
.into_iter()
.enumerate()
.map(|(index, field)| SingleFieldMapper::map_static(self, field.as_ref(), escaper))
.collect::<Vec<Cow<'_, str>>>()
.join(",");
Cow::Owned(s)
}
fn map_static_indexed_fields<'a, T>(
&self,
fields: T,
escaper: &dyn KeywordsEscaper,
) -> Cow<'a, str>
where
T: IntoIterator<Item = &'a FieldDef<'a>>,
{
let s = fields
.into_iter()
.enumerate()
.map(|(index, field)| {
SingleFieldMapper::map_static_indexed(self, field.as_ref(), escaper, index)
})
.collect::<Vec<Cow<'_, str>>>()
.join(",");
Cow::Owned(s)
}
fn map_dynamic_fields<'a, T>(
&self,
fields: T,
escaper: &dyn KeywordsEscaper,
is_optional: bool,
indexed: bool,
comma_type: LeadingCommaType,
connect_op: ConnectOp,
is_enum: bool,
static_cond: bool
) -> TokenStream
where
T: IntoIterator<Item = &'a FieldDef<'a>>, {
let mut stream = TokenStream::new();
for (index, field) in fields.into_iter().enumerate() {
if index == 0 {
stream.extend(self.map_single(field, escaper, is_optional, indexed, comma_type, connect_op, is_enum, static_cond));
} else {
stream.extend(self.map_single(field, escaper, is_optional, indexed, Leading, connect_op, is_enum, static_cond));
}
};
stream
}
// fn map_group<'a, T>(
// &self,
// fields: T,
// escaper: &dyn KeywordsEscaper,
// indexed: bool,
// leading_comma: bool,
// ) -> TokenStream
// where
// T: IntoIterator<Item = &'a FieldDef<'a>>,
// {
// if indexed {
// MultiFieldMapper::map_indexed(self, fields, escaper, leading_comma)
// } else {
// MultiFieldMapper::map(self, fields, escaper, leading_comma)
// }
// }
//
// fn map<'a, T>(
// &self,
// fields: T,
// escaper: &dyn KeywordsEscaper,
// leading_comma: bool,
// ) -> TokenStream
// where
// T: IntoIterator<Item = &'a FieldDef<'a>>,
// {
// let origin = fields
// .into_iter()
// .enumerate()
// .map(|(index, field)| {
// SingleFieldMapper::map(self, field.as_ref(), escaper, LeadingCommaType::NoLeading)
// })
// .collect::<Vec<Cow<'_, str>>>()
// .join(",");
// let stream = if leading_comma {
// format!(",{}", origin)
// } else {
// origin
// };
// quote! {
// #stream
// }
// }
//
// fn map_indexed<'a, T>(
// &self,
// fields: T,
// escaper: &dyn KeywordsEscaper,
// leading_comma: bool,
// ) -> TokenStream
// where
// T: IntoIterator<Item = &'a FieldDef<'a>>,
// {
// let origin = fields
// .into_iter()
// .enumerate()
// .map(|(index, field)| {
// let name = SingleFieldMapper::map_indexed(
// self,
// field,
// escaper,
// LeadingCommaType::NoLeading,
// index,
// );
// name
// })
// .collect::<Vec<Cow<'_, str>>>()
// .join(",");
// let stream = if leading_comma {
// format!(",{}", origin)
// } else {
// origin
// };
// quote! {
// #stream
// }
// }
// fn map_with_leading_comma<'a, T>(&self, fields: T, escaper: &dyn KeywordsEscaper) -> TokenStream
// where
// T: IntoIterator<Item = &'a FieldDef<'a>>,
// {
// let stream = fields
// .into_iter()
// .map(|field| {
// let name = SingleFieldMapper::map(self, field, escaper, LeadingCommaType::Leading);
// name
// })
// .collect::<Vec<Cow<'_, str>>>()
// .join("");
// quote! {
// #stream
// }
// }
// fn map_indexed_with_leading_comma<'a, T>(
// &self,
// fields: T,
// escaper: &dyn KeywordsEscaper,
// ) -> TokenStream
// where
// T: IntoIterator<Item = &'a FieldDef<'a>>,
// {
// let stream = fields
// .into_iter()
// .enumerate()
// .map(|(index, field)| {
// let name = SingleFieldMapper::map_indexed(
// self,
// field,
// escaper,
// LeadingCommaType::Leading,
// index,
// );
// name
// })
// .collect::<Vec<Cow<'_, str>>>()
// .join("");
// quote! {
// #stream
// }
// }
}
impl<T: SingleFieldMapper> MultiFieldMapper for T {}