async-graphql 0.5.0

use crate::model::{__EnumValue, __Field, __InputValue, __TypeKind};
use crate::registry::Type;
use crate::{registry, Context, Result};
use async_graphql_derive::Object;

#[Object(
    internal,
    desc = r#"
The fundamental unit of any GraphQL Schema is the type. There are many kinds of types in GraphQL as represented by the `__TypeKind` enum.

Depending on the kind of a type, certain fields describe information about that type. Scalar types provide no information beyond a name and description, while Enum types provide their values. Object and Interface types provide the fields they describe. Abstract types, Union and Interface, provide the Object types possible at runtime. List and NonNull types compose other types.
"#,
    field(name = "kind", type = "__TypeKind", owned),
    field(name = "name", type = "Option<String>", owned),
    field(name = "description", type = "Option<String>", owned),
    field(
        name = "fields",
        type = "Option<Vec<__Field>>",
        owned,
        arg(name = "includeDeprecated", type = "bool")
    ),
    field(name = "interfaces", type = "Option<Vec<__Type>>", owned),
    field(name = "possibleTypes", type = "Option<Vec<__Type>>", owned),
    field(
        name = "enumValues",
        type = "Option<Vec<__EnumValue>>",
        owned,
        arg(name = "includeDeprecated", type = "bool")
    ),
    field(name = "inputFields", type = "Option<Vec<__InputValue>>", owned),
    field(name = "ofType", type = "Option<__Type>", owned)
)]
pub struct __Type<'a> {
    pub registry: &'a registry::Registry,
    pub ty: &'a registry::Type,
}

#[async_trait::async_trait]
impl<'a> __TypeFields for __Type<'a> {
    async fn kind(&self, _: &Context<'_>) -> Result<__TypeKind> {
        Ok(match self.ty {
            registry::Type::Scalar { .. } => __TypeKind::SCALAR,
            registry::Type::Object { .. } => __TypeKind::OBJECT,
            registry::Type::Interface { .. } => __TypeKind::INTERFACE,
            registry::Type::Union { .. } => __TypeKind::UNION,
            registry::Type::Enum { .. } => __TypeKind::ENUM,
            registry::Type::InputObject { .. } => __TypeKind::INPUT_OBJECT,
            registry::Type::List { .. } => __TypeKind::LIST,
            registry::Type::NonNull { .. } => __TypeKind::NON_NULL,
        })
    }

    async fn name(&self, _: &Context<'_>) -> Result<Option<String>> {
        Ok(match self.ty {
            registry::Type::Scalar { name, .. } => Some(name.clone()),
            registry::Type::Object { name, .. } => Some(name.to_string()),
            registry::Type::Interface { name, .. } => Some(name.to_string()),
            registry::Type::Union { name, .. } => Some(name.to_string()),
            registry::Type::Enum { name, .. } => Some(name.to_string()),
            registry::Type::InputObject { name, .. } => Some(name.to_string()),
            registry::Type::List { .. } => None,
            registry::Type::NonNull { .. } => None,
        })
    }

    async fn description(&self, _: &Context<'_>) -> Result<Option<String>> {
        Ok(match self.ty {
            registry::Type::Scalar { description, .. } => description.map(|s| s.to_string()),
            registry::Type::Object { description, .. } => description.map(|s| s.to_string()),
            registry::Type::Interface { description, .. } => description.map(|s| s.to_string()),
            registry::Type::Union { description, .. } => description.map(|s| s.to_string()),
            registry::Type::Enum { description, .. } => description.map(|s| s.to_string()),
            registry::Type::InputObject { description, .. } => description.map(|s| s.to_string()),
            registry::Type::List { .. } => None,
            registry::Type::NonNull { .. } => None,
        })
    }

    async fn fields<'b>(
        &'b self,
        _: &Context<'_>,
        include_deprecated: bool,
    ) -> Result<Option<Vec<__Field<'b>>>> {
        if let Type::Object { fields, .. } = self.ty {
            Ok(Some(
                fields
                    .iter()
                    .filter(|field| {
                        if include_deprecated {
                            true
                        } else {
                            field.deprecation.is_none()
                        }
                    })
                    .map(|field| __Field {
                        registry: self.registry,
                        field,
                    })
                    .collect(),
            ))
        } else {
            Ok(None)
        }
    }

    async fn interfaces<'b>(&'b self, _: &Context<'_>) -> Result<Option<Vec<__Type<'b>>>> {
        Ok(None)
    }

    async fn possible_types<'b>(&'b self, _: &Context<'_>) -> Result<Option<Vec<__Type<'b>>>> {
        Ok(None)
    }

    async fn enum_values<'b>(
        &'b self,
        _: &Context<'_>,
        include_deprecated: bool,
    ) -> Result<Option<Vec<__EnumValue<'b>>>> {
        if let Type::Enum { enum_values, .. } = self.ty {
            Ok(Some(
                enum_values
                    .iter()
                    .filter(|field| {
                        if include_deprecated {
                            true
                        } else {
                            field.deprecation.is_none()
                        }
                    })
                    .map(|value| __EnumValue {
                        registry: self.registry,
                        value,
                    })
                    .collect(),
            ))
        } else {
            Ok(None)
        }
    }

    async fn input_fields<'b>(&'b self, _: &Context<'_>) -> Result<Option<Vec<__InputValue<'b>>>> {
        if let Type::InputObject { input_fields, .. } = self.ty {
            Ok(Some(
                input_fields
                    .iter()
                    .map(|input_value| __InputValue {
                        registry: self.registry,
                        input_value,
                    })
                    .collect(),
            ))
        } else {
            Ok(None)
        }
    }

    async fn of_type<'b>(&'b self, _: &Context<'_>) -> Result<Option<__Type<'b>>> {
        Ok(None)
    }
}