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use std::{borrow::Cow, marker::PhantomData};
use crate::{
connection::{edge::Edge, ConnectionNameType, EdgeNameType, PageInfo},
types::connection::{CursorType, EmptyFields},
Object, ObjectType, OutputType, TypeName,
};
pub struct Connection<
Name,
EdgeName,
Cursor,
Node,
ConnectionFields = EmptyFields,
EdgeFields = EmptyFields,
> where
Name: ConnectionNameType,
EdgeName: EdgeNameType,
Cursor: CursorType + Send + Sync,
Node: OutputType,
ConnectionFields: ObjectType,
EdgeFields: ObjectType,
{
_mark1: PhantomData<Name>,
_mark2: PhantomData<EdgeName>,
pub edges: Vec<Edge<EdgeName, Cursor, Node, EdgeFields>>,
pub additional_fields: ConnectionFields,
pub has_previous_page: bool,
pub has_next_page: bool,
}
impl<Name, EdgeName, Cursor, Node, EdgeFields>
Connection<Name, EdgeName, Cursor, Node, EmptyFields, EdgeFields>
where
Name: ConnectionNameType,
EdgeName: EdgeNameType,
Cursor: CursorType + Send + Sync,
Node: OutputType,
EdgeFields: ObjectType,
{
#[inline]
pub fn new(has_previous_page: bool, has_next_page: bool) -> Self {
Connection {
_mark1: PhantomData,
_mark2: PhantomData,
additional_fields: EmptyFields,
has_previous_page,
has_next_page,
edges: Vec::new(),
}
}
}
impl<Name, EdgeName, Cursor, Node, ConnectionFields, EdgeFields>
Connection<Name, EdgeName, Cursor, Node, ConnectionFields, EdgeFields>
where
Name: ConnectionNameType,
EdgeName: EdgeNameType,
Cursor: CursorType + Send + Sync,
Node: OutputType,
ConnectionFields: ObjectType,
EdgeFields: ObjectType,
{
#[inline]
pub fn with_additional_fields(
has_previous_page: bool,
has_next_page: bool,
additional_fields: ConnectionFields,
) -> Self {
Connection {
_mark1: PhantomData,
_mark2: PhantomData,
additional_fields,
has_previous_page,
has_next_page,
edges: Vec::new(),
}
}
}
#[Object(internal, name_type)]
impl<Name, EdgeName, Cursor, Node, ConnectionFields, EdgeFields>
Connection<Name, EdgeName, Cursor, Node, ConnectionFields, EdgeFields>
where
Name: ConnectionNameType,
EdgeName: EdgeNameType,
Cursor: CursorType + Send + Sync,
Node: OutputType,
ConnectionFields: ObjectType,
EdgeFields: ObjectType,
{
async fn page_info(&self) -> PageInfo {
PageInfo {
has_previous_page: self.has_previous_page,
has_next_page: self.has_next_page,
start_cursor: self.edges.first().map(|edge| edge.cursor.0.encode_cursor()),
end_cursor: self.edges.last().map(|edge| edge.cursor.0.encode_cursor()),
}
}
#[inline]
async fn edges(&self) -> &[Edge<EdgeName, Cursor, Node, EdgeFields>] {
&self.edges
}
#[graphql(flatten)]
#[inline]
async fn additional_fields(&self) -> &ConnectionFields {
&self.additional_fields
}
}
impl<Name, EdgeName, Cursor, Node, ConnectionFields, EdgeFields> TypeName
for Connection<Name, EdgeName, Cursor, Node, ConnectionFields, EdgeFields>
where
Name: ConnectionNameType,
EdgeName: EdgeNameType,
Cursor: CursorType + Send + Sync,
Node: OutputType,
ConnectionFields: ObjectType,
EdgeFields: ObjectType,
{
#[inline]
fn type_name() -> Cow<'static, str> {
Name::type_name::<Node>().into()
}
}