687 lines
21 KiB
Rust
687 lines
21 KiB
Rust
use crate::parser::types::{BaseType as ParsedBaseType, Type as ParsedType};
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use crate::validators::InputValueValidator;
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use crate::{model, Any, Type as _, Value};
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use indexmap::map::IndexMap;
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use indexmap::set::IndexSet;
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use itertools::Itertools;
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use std::collections::{HashMap, HashSet};
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use std::fmt::Write;
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use std::sync::Arc;
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fn strip_brackets(type_name: &str) -> Option<&str> {
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if let Some(rest) = type_name.strip_prefix('[') {
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Some(&rest[..rest.len() - 1])
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} else {
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None
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}
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}
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#[derive(Clone, Copy, PartialEq, Debug)]
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pub enum MetaTypeName<'a> {
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List(&'a str),
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NonNull(&'a str),
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Named(&'a str),
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}
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impl<'a> std::fmt::Display for MetaTypeName<'a> {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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match self {
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MetaTypeName::Named(name) => write!(f, "{}", name),
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MetaTypeName::NonNull(name) => write!(f, "{}!", name),
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MetaTypeName::List(name) => write!(f, "[{}]", name),
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}
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}
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}
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impl<'a> MetaTypeName<'a> {
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pub fn create(type_name: &str) -> MetaTypeName {
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if let Some(type_name) = type_name.strip_suffix('!') {
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MetaTypeName::NonNull(type_name)
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} else if let Some(type_name) = strip_brackets(type_name) {
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MetaTypeName::List(type_name)
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} else {
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MetaTypeName::Named(type_name)
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}
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}
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pub fn concrete_typename(type_name: &str) -> &str {
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match MetaTypeName::create(type_name) {
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MetaTypeName::List(type_name) => Self::concrete_typename(type_name),
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MetaTypeName::NonNull(type_name) => Self::concrete_typename(type_name),
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MetaTypeName::Named(type_name) => type_name,
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}
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}
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pub fn is_non_null(&self) -> bool {
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matches!(self, MetaTypeName::NonNull(_))
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}
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pub fn unwrap_non_null(&self) -> Self {
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match self {
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MetaTypeName::NonNull(ty) => MetaTypeName::create(ty),
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_ => *self,
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}
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}
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pub fn is_subtype(&self, sub: &MetaTypeName<'_>) -> bool {
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match (self, sub) {
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(MetaTypeName::NonNull(super_type), MetaTypeName::NonNull(sub_type))
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| (MetaTypeName::Named(super_type), MetaTypeName::NonNull(sub_type)) => {
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MetaTypeName::create(super_type).is_subtype(&MetaTypeName::create(sub_type))
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}
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(MetaTypeName::Named(super_type), MetaTypeName::Named(sub_type)) => {
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super_type == sub_type
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}
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(MetaTypeName::List(super_type), MetaTypeName::List(sub_type)) => {
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MetaTypeName::create(super_type).is_subtype(&MetaTypeName::create(sub_type))
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}
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_ => false,
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}
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}
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}
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#[derive(Clone)]
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pub struct MetaInputValue {
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pub name: &'static str,
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pub description: Option<&'static str>,
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pub ty: String,
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pub default_value: Option<String>,
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pub validator: Option<Arc<dyn InputValueValidator>>,
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}
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#[derive(Clone)]
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pub struct MetaField {
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pub name: String,
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pub description: Option<&'static str>,
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pub args: IndexMap<&'static str, MetaInputValue>,
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pub ty: String,
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pub deprecation: Option<&'static str>,
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pub cache_control: CacheControl,
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pub external: bool,
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pub requires: Option<&'static str>,
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pub provides: Option<&'static str>,
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}
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#[derive(Clone)]
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pub struct MetaEnumValue {
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pub name: &'static str,
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pub description: Option<&'static str>,
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pub deprecation: Option<&'static str>,
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}
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/// Cache control values
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///
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/// # Examples
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///
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/// ```rust
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/// use async_graphql::*;
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///
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/// struct QueryRoot;
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///
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/// #[Object(cache_control(max_age = 60))]
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/// impl QueryRoot {
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/// #[field(cache_control(max_age = 30))]
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/// async fn value1(&self) -> i32 {
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/// 0
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/// }
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///
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/// #[field(cache_control(private))]
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/// async fn value2(&self) -> i32 {
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/// 0
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/// }
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/// }
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///
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/// #[async_std::main]
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/// async fn main() {
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/// let schema = Schema::new(QueryRoot, EmptyMutation, EmptySubscription);
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/// assert_eq!(schema.execute("{ value1 }").await.unwrap().cache_control, CacheControl { public: true, max_age: 30 });
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/// assert_eq!(schema.execute("{ value2 }").await.unwrap().cache_control, CacheControl { public: false, max_age: 60 });
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/// assert_eq!(schema.execute("{ value1 value2 }").await.unwrap().cache_control, CacheControl { public: false, max_age: 30 });
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/// }
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/// ```
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#[derive(Clone, Copy, PartialEq, Eq, Debug)]
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pub struct CacheControl {
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/// Scope is public, default is true.
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pub public: bool,
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/// Cache max age, default is 0.
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pub max_age: usize,
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}
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impl Default for CacheControl {
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fn default() -> Self {
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Self {
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public: true,
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max_age: 0,
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}
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}
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}
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impl CacheControl {
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/// Get 'Cache-Control' header value.
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#[must_use]
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pub fn value(&self) -> Option<String> {
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if self.max_age > 0 {
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Some(format!(
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"max-age={}{}",
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self.max_age,
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if self.public { "" } else { ", private" }
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))
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} else {
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None
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}
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}
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}
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impl CacheControl {
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pub(crate) fn merge(&mut self, other: &CacheControl) {
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self.public = self.public && other.public;
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self.max_age = if self.max_age == 0 {
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other.max_age
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} else if other.max_age == 0 {
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self.max_age
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} else {
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self.max_age.min(other.max_age)
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};
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}
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}
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pub enum MetaType {
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Scalar {
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name: String,
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description: Option<&'static str>,
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is_valid: fn(value: &Value) -> bool,
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},
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Object {
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name: String,
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description: Option<&'static str>,
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fields: IndexMap<String, MetaField>,
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cache_control: CacheControl,
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extends: bool,
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keys: Option<Vec<String>>,
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},
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Interface {
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name: String,
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description: Option<&'static str>,
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fields: IndexMap<String, MetaField>,
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possible_types: IndexSet<String>,
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extends: bool,
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keys: Option<Vec<String>>,
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},
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Union {
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name: String,
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description: Option<&'static str>,
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possible_types: IndexSet<String>,
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},
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Enum {
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name: String,
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description: Option<&'static str>,
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enum_values: IndexMap<&'static str, MetaEnumValue>,
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},
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InputObject {
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name: String,
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description: Option<&'static str>,
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input_fields: IndexMap<String, MetaInputValue>,
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},
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}
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impl MetaType {
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pub fn field_by_name(&self, name: &str) -> Option<&MetaField> {
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self.fields().and_then(|fields| fields.get(name))
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}
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pub fn fields(&self) -> Option<&IndexMap<String, MetaField>> {
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match self {
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MetaType::Object { fields, .. } => Some(&fields),
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MetaType::Interface { fields, .. } => Some(&fields),
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_ => None,
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}
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}
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pub fn name(&self) -> &str {
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match self {
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MetaType::Scalar { name, .. } => &name,
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MetaType::Object { name, .. } => name,
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MetaType::Interface { name, .. } => name,
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MetaType::Union { name, .. } => name,
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MetaType::Enum { name, .. } => name,
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MetaType::InputObject { name, .. } => name,
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}
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}
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pub fn is_composite(&self) -> bool {
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match self {
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MetaType::Object { .. } => true,
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MetaType::Interface { .. } => true,
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MetaType::Union { .. } => true,
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_ => false,
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}
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}
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pub fn is_abstract(&self) -> bool {
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match self {
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MetaType::Interface { .. } => true,
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MetaType::Union { .. } => true,
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_ => false,
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}
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}
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pub fn is_leaf(&self) -> bool {
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match self {
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MetaType::Enum { .. } => true,
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MetaType::Scalar { .. } => true,
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_ => false,
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}
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}
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pub fn is_input(&self) -> bool {
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match self {
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MetaType::Enum { .. } => true,
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MetaType::Scalar { .. } => true,
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MetaType::InputObject { .. } => true,
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_ => false,
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}
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}
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pub fn is_possible_type(&self, type_name: &str) -> bool {
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match self {
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MetaType::Interface { possible_types, .. } => possible_types.contains(type_name),
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MetaType::Union { possible_types, .. } => possible_types.contains(type_name),
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MetaType::Object { name, .. } => name == type_name,
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_ => false,
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}
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}
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pub fn possible_types(&self) -> Option<&IndexSet<String>> {
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match self {
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MetaType::Interface { possible_types, .. } => Some(possible_types),
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MetaType::Union { possible_types, .. } => Some(possible_types),
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_ => None,
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}
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}
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pub fn type_overlap(&self, ty: &MetaType) -> bool {
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if self as *const MetaType == ty as *const MetaType {
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return true;
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}
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match (self.is_abstract(), ty.is_abstract()) {
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(true, true) => self
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.possible_types()
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.iter()
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.copied()
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.flatten()
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.any(|type_name| ty.is_possible_type(type_name)),
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(true, false) => self.is_possible_type(ty.name()),
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(false, true) => ty.is_possible_type(self.name()),
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(false, false) => false,
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}
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}
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}
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pub struct MetaDirective {
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pub name: &'static str,
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pub description: Option<&'static str>,
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pub locations: Vec<model::__DirectiveLocation>,
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pub args: IndexMap<&'static str, MetaInputValue>,
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}
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pub struct Registry {
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pub types: HashMap<String, MetaType>,
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pub directives: HashMap<String, MetaDirective>,
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pub implements: HashMap<String, HashSet<String>>,
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pub query_type: String,
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pub mutation_type: Option<String>,
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pub subscription_type: Option<String>,
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}
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impl Registry {
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pub fn create_type<T: crate::Type, F: FnMut(&mut Registry) -> MetaType>(
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&mut self,
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mut f: F,
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) -> String {
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let name = T::type_name();
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if !self.types.contains_key(name.as_ref()) {
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// Inserting a fake type before calling the function allows recursive types to exist.
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self.types.insert(
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name.clone().into_owned(),
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MetaType::Object {
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name: "".to_string(),
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description: None,
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fields: Default::default(),
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cache_control: Default::default(),
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extends: false,
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keys: None,
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},
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);
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let ty = f(self);
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*self.types.get_mut(&*name).unwrap() = ty;
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}
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T::qualified_type_name()
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}
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pub fn add_directive(&mut self, directive: MetaDirective) {
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self.directives
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.insert(directive.name.to_string(), directive);
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}
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pub fn add_implements(&mut self, ty: &str, interface: &str) {
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self.implements
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.entry(ty.to_string())
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.and_modify(|interfaces| {
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interfaces.insert(interface.to_string());
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})
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.or_insert({
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let mut interfaces = HashSet::new();
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interfaces.insert(interface.to_string());
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interfaces
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});
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}
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pub fn add_keys(&mut self, ty: &str, keys: &str) {
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let all_keys = match self.types.get_mut(ty) {
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Some(MetaType::Object { keys: all_keys, .. }) => all_keys,
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Some(MetaType::Interface { keys: all_keys, .. }) => all_keys,
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_ => return,
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};
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if let Some(all_keys) = all_keys {
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all_keys.push(keys.to_string());
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} else {
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*all_keys = Some(vec![keys.to_string()]);
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}
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}
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pub fn concrete_type_by_name(&self, type_name: &str) -> Option<&MetaType> {
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self.types.get(MetaTypeName::concrete_typename(type_name))
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}
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pub fn concrete_type_by_parsed_type(&self, query_type: &ParsedType) -> Option<&MetaType> {
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match &query_type.base {
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ParsedBaseType::Named(name) => self.types.get(name.as_str()),
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ParsedBaseType::List(ty) => self.concrete_type_by_parsed_type(ty),
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}
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}
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fn create_federation_fields<'a, I: Iterator<Item = &'a MetaField>>(sdl: &mut String, it: I) {
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for field in it {
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if field.name.starts_with("__") || matches!(&*field.name, "_service" | "_entities") {
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continue;
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}
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if !field.args.is_empty() {
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write!(
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sdl,
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"\t{}({}): {}",
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field.name,
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field
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.args
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.values()
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.map(|arg| federation_input_value(arg))
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.join(", "),
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field.ty
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)
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.ok();
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} else {
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write!(sdl, "\t{}: {}", field.name, field.ty).ok();
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}
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if field.external {
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write!(sdl, " @external").ok();
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}
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if let Some(requires) = field.requires {
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write!(sdl, " @requires(fields: \"{}\")", requires).ok();
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}
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if let Some(provides) = field.provides {
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write!(sdl, " @provides(fields: \"{}\")", provides).ok();
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}
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writeln!(sdl).ok();
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}
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}
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fn create_federation_type(&self, ty: &MetaType, sdl: &mut String) {
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match ty {
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MetaType::Scalar { name, .. } => {
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const SYSTEM_SCALARS: &[&str] = &["Int", "Float", "String", "Boolean", "ID", "Any"];
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if !SYSTEM_SCALARS.contains(&name.as_str()) {
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writeln!(sdl, "scalar {}", name).ok();
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}
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}
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MetaType::Object {
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name,
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fields,
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extends,
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keys,
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..
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} => {
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if name == &self.query_type && fields.len() == 4 {
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// Is empty query root, only __schema, __type, _service, _entities fields
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return;
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}
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if let Some(subscription_type) = &self.subscription_type {
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if name == subscription_type {
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return;
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}
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}
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if *extends {
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write!(sdl, "extend ").ok();
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}
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write!(sdl, "type {} ", name).ok();
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if let Some(implements) = self.implements.get(name) {
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if !implements.is_empty() {
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write!(sdl, "implements {}", implements.iter().join(" & ")).ok();
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}
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}
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if let Some(keys) = keys {
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for key in keys {
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write!(sdl, "@key(fields: \"{}\") ", key).ok();
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}
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}
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writeln!(sdl, "{{").ok();
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Self::create_federation_fields(sdl, fields.values());
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writeln!(sdl, "}}").ok();
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}
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MetaType::Interface {
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name,
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fields,
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extends,
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keys,
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..
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} => {
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if *extends {
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write!(sdl, "extend ").ok();
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}
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write!(sdl, "interface {} ", name).ok();
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if let Some(keys) = keys {
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for key in keys {
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write!(sdl, "@key(fields: \"{}\") ", key).ok();
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}
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}
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writeln!(sdl, "{{").ok();
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Self::create_federation_fields(sdl, fields.values());
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writeln!(sdl, "}}").ok();
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}
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MetaType::Enum {
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name, enum_values, ..
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} => {
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write!(sdl, "enum {} ", name).ok();
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writeln!(sdl, "{{").ok();
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for value in enum_values.values() {
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writeln!(sdl, "{}", value.name).ok();
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}
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writeln!(sdl, "}}").ok();
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}
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MetaType::InputObject {
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name, input_fields, ..
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} => {
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write!(sdl, "input {} ", name).ok();
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writeln!(sdl, "{{").ok();
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for field in input_fields.values() {
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writeln!(sdl, "{}", federation_input_value(&field)).ok();
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}
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writeln!(sdl, "}}").ok();
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}
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MetaType::Union {
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name,
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possible_types,
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..
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} => {
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writeln!(
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sdl,
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"union {} = {}",
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name,
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possible_types.iter().join(" | ")
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)
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.ok();
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}
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}
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}
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|
pub fn create_federation_sdl(&self) -> String {
|
|
let mut sdl = String::new();
|
|
for ty in self.types.values() {
|
|
if ty.name().starts_with("__") {
|
|
continue;
|
|
}
|
|
const FEDERATION_TYPES: &[&str] = &["_Any", "_Entity", "_Service"];
|
|
if FEDERATION_TYPES.contains(&ty.name()) {
|
|
continue;
|
|
}
|
|
self.create_federation_type(ty, &mut sdl);
|
|
}
|
|
sdl
|
|
}
|
|
|
|
pub(crate) fn has_entities(&self) -> bool {
|
|
self.types.values().any(|ty| match ty {
|
|
MetaType::Object {
|
|
keys: Some(keys), ..
|
|
} => !keys.is_empty(),
|
|
MetaType::Interface {
|
|
keys: Some(keys), ..
|
|
} => !keys.is_empty(),
|
|
_ => false,
|
|
})
|
|
}
|
|
|
|
fn create_entity_type(&mut self) {
|
|
let possible_types = self
|
|
.types
|
|
.values()
|
|
.filter_map(|ty| match ty {
|
|
MetaType::Object {
|
|
name,
|
|
keys: Some(keys),
|
|
..
|
|
} if !keys.is_empty() => Some(name.clone()),
|
|
MetaType::Interface {
|
|
name,
|
|
keys: Some(keys),
|
|
..
|
|
} if !keys.is_empty() => Some(name.clone()),
|
|
_ => None,
|
|
})
|
|
.collect();
|
|
|
|
self.types.insert(
|
|
"_Entity".to_string(),
|
|
MetaType::Union {
|
|
name: "_Entity".to_string(),
|
|
description: None,
|
|
possible_types,
|
|
},
|
|
);
|
|
}
|
|
|
|
pub fn create_federation_types(&mut self) {
|
|
Any::create_type_info(self);
|
|
|
|
self.types.insert(
|
|
"_Service".to_string(),
|
|
MetaType::Object {
|
|
name: "_Service".to_string(),
|
|
description: None,
|
|
fields: {
|
|
let mut fields = IndexMap::new();
|
|
fields.insert(
|
|
"sdl".to_string(),
|
|
MetaField {
|
|
name: "sdl".to_string(),
|
|
description: None,
|
|
args: Default::default(),
|
|
ty: "String".to_string(),
|
|
deprecation: None,
|
|
cache_control: Default::default(),
|
|
external: false,
|
|
requires: None,
|
|
provides: None,
|
|
},
|
|
);
|
|
fields
|
|
},
|
|
cache_control: Default::default(),
|
|
extends: false,
|
|
keys: None,
|
|
},
|
|
);
|
|
|
|
self.create_entity_type();
|
|
|
|
let query_root = self.types.get_mut(&self.query_type).unwrap();
|
|
if let MetaType::Object { fields, .. } = query_root {
|
|
fields.insert(
|
|
"_service".to_string(),
|
|
MetaField {
|
|
name: "_service".to_string(),
|
|
description: None,
|
|
args: Default::default(),
|
|
ty: "_Service!".to_string(),
|
|
deprecation: None,
|
|
cache_control: Default::default(),
|
|
external: false,
|
|
requires: None,
|
|
provides: None,
|
|
},
|
|
);
|
|
|
|
fields.insert(
|
|
"_entities".to_string(),
|
|
MetaField {
|
|
name: "_entities".to_string(),
|
|
description: None,
|
|
args: {
|
|
let mut args = IndexMap::new();
|
|
args.insert(
|
|
"representations",
|
|
MetaInputValue {
|
|
name: "representations",
|
|
description: None,
|
|
ty: "[_Any!]!".to_string(),
|
|
default_value: None,
|
|
validator: None,
|
|
},
|
|
);
|
|
args
|
|
},
|
|
ty: "[_Entity]!".to_string(),
|
|
deprecation: None,
|
|
cache_control: Default::default(),
|
|
external: false,
|
|
requires: None,
|
|
provides: None,
|
|
},
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
fn federation_input_value(input_value: &MetaInputValue) -> String {
|
|
if let Some(default_value) = &input_value.default_value {
|
|
format!(
|
|
"{}: {} = {}",
|
|
input_value.name, input_value.ty, default_value
|
|
)
|
|
} else {
|
|
format!("{}: {}", input_value.name, input_value.ty)
|
|
}
|
|
}
|