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use crate::field_mapper::base::field_group_list2::{FieldGroup, FieldGroupList};
use crate::field_mapper::base::single_field_mapper::ConnectOp;
use crate::field_mapper::base::MultiFieldMapper;
use crate::field_mapper::base::SingleFieldMapper;
use crate::{FieldDef, KeywordsEscaper};
use proc_macro2::TokenStream;
use quote::quote;
pub trait Connector2: MultiFieldMapper {
fn _connect<'a, T>(&self, fields: T, escaper: &dyn KeywordsEscaper) -> TokenStream
where
T: IntoIterator<Item = &'a FieldDef<'a>> + Clone,
{
let field_group_list = FieldGroupList::from(fields);
let mut stream = quote! {
let mut s = String::default();
let mut has_prev = false;
};
let groups = field_group_list.groups;
for group in groups.iter() {
match group {
FieldGroup::LeadingRequired { fields, comma_type } => {
stream.extend(self.map_to_stream(
fields,
escaper,
false,
*comma_type,
ConnectOp::Comma,
false,
));
stream.extend(quote! { has_prev = true; });
}
FieldGroup::LeadingFailRequired { fields, comma_type }
| FieldGroup::TrailingRequired { fields, comma_type } => {
stream.extend(self.map_to_stream(
fields,
escaper,
false,
*comma_type,
ConnectOp::Comma,
false
));
}
FieldGroup::LeadingOptional { field, comma_type }
| FieldGroup::FollowingOptional { field, comma_type }
| FieldGroup::TrailingOptional { field, comma_type } => {
stream.extend(self.map_single_optional(
field,
escaper,
false,
*comma_type,
ConnectOp::Comma,
false,
false
));
}
}
}
quote! {
{
#stream
s
}
}
}
fn _connect_indexed<'a, T>(&self, fields: T, escaper: &dyn KeywordsEscaper) -> TokenStream
where
T: IntoIterator<Item = &'a FieldDef<'a>> + Clone,
{
let field_group_list = FieldGroupList::from(fields);
let mut stream = quote! {
let mut s = String::default();
let mut has_prev = false;
let mut index = 0;
};
let groups = field_group_list.groups;
for group in groups.iter() {
match group {
FieldGroup::LeadingRequired { fields, comma_type } => {
stream.extend(self.map_to_stream(
fields,
escaper,
true,
*comma_type,
ConnectOp::Comma,
false
));
stream.extend(quote! { has_prev = true; });
let len = fields.len();
stream.extend(quote! { index += #len; });
}
FieldGroup::LeadingFailRequired { fields, comma_type }
| FieldGroup::TrailingRequired { fields, comma_type } => {
let s = self.map_dynamic_fields(
fields,
escaper,
false,
true,
*comma_type,
ConnectOp::Comma,
false,
false
);
stream.extend(s)
}
FieldGroup::LeadingOptional { field, comma_type }
| FieldGroup::FollowingOptional { field, comma_type }
| FieldGroup::TrailingOptional { field, comma_type } => {
stream.extend(self.map_single_optional(
field,
escaper,
true,
*comma_type,
ConnectOp::Comma,
false,
false
));
}
}
}
quote! {
{
#stream
s
}
}
}
fn _connect_expr<'a, T>(
&self,
fields: T,
escaper: &dyn KeywordsEscaper,
indexed: bool,
is_enum: bool,
) -> TokenStream
where
T: IntoIterator<Item = &'a FieldDef<'a>> + Clone,
{
let field_group_list = FieldGroupList::from(fields);
let mut stream = quote! {
let mut s = String::default();
let mut has_prev = false;
};
if indexed {
stream.extend(quote! { let mut index = 0; });
}
let groups = field_group_list.groups;
for group in groups.iter() {
match group {
FieldGroup::LeadingRequired { fields, comma_type } => {
let s = self.map_dynamic_fields(
fields,
escaper,
false,
indexed,
*comma_type,
ConnectOp::And,
is_enum,
true
);
stream.extend(s);
stream.extend(quote! { has_prev = true; });
}
FieldGroup::LeadingFailRequired { fields, comma_type }
| FieldGroup::TrailingRequired { fields, comma_type } => {
let s = self.map_dynamic_fields(
fields,
escaper,
false,
indexed,
*comma_type,
ConnectOp::And,
is_enum,
true
);
stream.extend(s);
}
FieldGroup::LeadingOptional { field, comma_type } => {
stream.extend(self.map_single_optional(
field,
escaper,
false,
*comma_type,
ConnectOp::And,
is_enum,
true
));
}
FieldGroup::FollowingOptional { field, comma_type }
| FieldGroup::TrailingOptional { field, comma_type } => {
stream.extend(self.map_single_optional(
field,
escaper,
false,
*comma_type,
ConnectOp::And,
is_enum,
true
));
}
}
}
quote! {
{
#stream
s
}
}
}
}
impl<T: MultiFieldMapper> Connector2 for T {}