77 lines
2.0 KiB
Rust
77 lines
2.0 KiB
Rust
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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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/// #[GQLObject(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.into_result().unwrap().cache_control, CacheControl { public: true, max_age: 30 });
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/// assert_eq!(schema.execute("{ value2 }").await.into_result().unwrap().cache_control, CacheControl { public: false, max_age: 60 });
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/// assert_eq!(schema.execute("{ value1 value2 }").await.into_result().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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