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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
use deno_ast::ModuleSpecifier;
use deno_core::error::AnyError;
use super::CacheType;
use super::Cacher;
/// Emit cache for a single file.
#[derive(Debug, Clone, PartialEq)]
pub struct SpecifierEmitCacheData {
pub source_hash: String,
pub text: String,
pub map: Option<String>,
}
pub trait EmitCache {
/// Gets the emit data from the cache.
fn get_emit_data(
&self,
specifier: &ModuleSpecifier,
) -> Option<SpecifierEmitCacheData>;
/// Sets the emit data in the cache.
fn set_emit_data(
&self,
specifier: ModuleSpecifier,
data: SpecifierEmitCacheData,
) -> Result<(), AnyError>;
/// Gets the stored hash of the source of the provider specifier
/// to tell if the emit is out of sync with the source.
/// TODO(13302): this is actually not reliable and should be removed
/// once switching to an sqlite db
fn get_source_hash(&self, specifier: &ModuleSpecifier) -> Option<String>;
/// Gets the emitted JavaScript of the TypeScript source.
/// TODO(13302): remove this once switching to an sqlite db
fn get_emit_text(&self, specifier: &ModuleSpecifier) -> Option<String>;
}
impl<T: Cacher> EmitCache for T {
fn get_emit_data(
&self,
specifier: &ModuleSpecifier,
) -> Option<SpecifierEmitCacheData> {
Some(SpecifierEmitCacheData {
source_hash: self.get_source_hash(specifier)?,
text: self.get_emit_text(specifier)?,
map: self.get(CacheType::SourceMap, specifier),
})
}
fn get_source_hash(&self, specifier: &ModuleSpecifier) -> Option<String> {
self.get(CacheType::Version, specifier)
}
fn get_emit_text(&self, specifier: &ModuleSpecifier) -> Option<String> {
self.get(CacheType::Emit, specifier)
}
fn set_emit_data(
&self,
specifier: ModuleSpecifier,
data: SpecifierEmitCacheData,
) -> Result<(), AnyError> {
self.set(CacheType::Version, &specifier, data.source_hash)?;
self.set(CacheType::Emit, &specifier, data.text)?;
if let Some(map) = data.map {
self.set(CacheType::SourceMap, &specifier, map)?;
}
Ok(())
}
}
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