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use biome_analyze::{
AddVisitor, FromServices, Phase, Phases, QueryKey, QueryMatch, Queryable, RuleDomain, RuleKey,
RuleMetadata, ServiceBag, ServicesDiagnostic, SyntaxVisitor,
};
use biome_js_semantic::SemanticModel;
use biome_js_syntax::{
AnyJsBinding, AnyJsExpression, AnyJsFunction, AnyJsRoot, JsClassDeclaration, JsClassExpression,
JsLanguage, JsObjectExpression, JsReferenceIdentifier, JsSyntaxNode,
};
use biome_js_type_info::Type;
use biome_module_graph::ModuleResolver;
use biome_rowan::{AstNode, TextRange};
use std::sync::Arc;
/// Service for use with type inference rules.
///
/// This service is used for retrieving [`Type`] instances for arbitrary
/// expressions or function definitions from the module graph.
#[derive(Clone)]
pub struct TypedService {
resolver: Option<Arc<ModuleResolver>>,
model: Option<SemanticModel>,
}
impl TypedService {
/// Returns the [`Type`] for the given `expression`.
pub fn type_of_expression(&self, expression: &AnyJsExpression) -> Type {
self.resolver
.as_ref()
.map(|resolver| resolver.resolved_type_of_expression(expression))
.unwrap_or_default()
}
/// Returns the [`Type`] of the value with the given `name`, as defined
/// in the scope that contains `range`.
pub fn type_of_named_value(&self, range: TextRange, name: &str) -> Type {
self.resolver
.as_ref()
.map(|resolver| resolver.resolved_type_of_named_value(range, name))
.unwrap_or_default()
}
/// Returns the [`Type`] for the given `function`.
pub fn type_of_function(&self, function: &AnyJsFunction) -> Type {
match function {
AnyJsFunction::JsArrowFunctionExpression(expr) => {
self.type_of_expression(&AnyJsExpression::JsArrowFunctionExpression(expr.clone()))
}
AnyJsFunction::JsFunctionDeclaration(decl) => decl
.id()
.ok()
.as_ref()
.and_then(AnyJsBinding::as_js_identifier_binding)
.and_then(|identifier| identifier.name_token().ok())
.and_then(|name| {
self.resolver.as_ref().map(|resolver| {
resolver.resolved_type_of_named_value(function.range(), name.text())
})
})
.unwrap_or_default(),
AnyJsFunction::JsFunctionExportDefaultDeclaration(_decl) => self
.resolver
.as_ref()
.and_then(|resolver| resolver.resolved_type_of_default_export())
.unwrap_or_default(),
AnyJsFunction::JsFunctionExpression(expr) => {
self.type_of_expression(&AnyJsExpression::JsFunctionExpression(expr.clone()))
}
}
}
/// Returns the [`Type`] for a class/object member by navigating to the
/// parent and looking up the member by name.
pub fn type_of_member(&self, member_syntax: &JsSyntaxNode, member_name: &str) -> Type {
let parent_type = member_syntax
.ancestors()
.find_map(|ancestor| {
if let Some(class) = JsClassDeclaration::cast(ancestor.clone()) {
return class
.id()
.ok()
.and_then(|id| id.as_js_identifier_binding().cloned())
.and_then(|id| id.name_token().ok())
.map(|name| {
let trimmed = name.token_text_trimmed();
self.type_of_named_value(name.text_trimmed_range(), trimmed.text())
});
}
if let Some(class_expr) = JsClassExpression::cast(ancestor.clone()) {
return Some(
self.type_of_expression(&AnyJsExpression::JsClassExpression(class_expr)),
);
}
if let Some(obj_expr) = JsObjectExpression::cast(ancestor.clone()) {
return Some(
self.type_of_expression(&AnyJsExpression::JsObjectExpression(obj_expr)),
);
}
None
})
.unwrap_or_default();
parent_type
.find_member_type(member_name)
.unwrap_or_default()
}
pub fn has_binding(&self, reference: &JsReferenceIdentifier) -> bool {
self.model
.as_ref()
.is_some_and(|model| model.binding(reference).is_some())
}
}
impl FromServices for TypedService {
fn from_services(
rule_key: &RuleKey,
rule_metadata: &RuleMetadata,
services: &ServiceBag,
) -> Result<Self, ServicesDiagnostic> {
if cfg!(debug_assertions) {
let has_project_domain = rule_metadata
.domains
.iter()
.any(|d| d == &RuleDomain::Types);
if !has_project_domain {
panic!("The rule {rule_key} uses TypedService, but it is not in the Types domain.");
}
}
let resolver: Option<&Option<Arc<ModuleResolver>>> = services.get_service();
let resolver = resolver.and_then(|resolver| resolver.as_ref().map(Arc::clone));
let model = services.get_service::<SemanticModel>().cloned();
Ok(Self { resolver, model })
}
}
impl Phase for TypedService {
fn phase() -> Phases {
Phases::Semantic
}
}
/// Query type usable by lint rules that wish to perform type inference on
/// nodes.
#[derive(Clone)]
pub struct Typed<N>(N);
impl<N> QueryMatch for Typed<N>
where
N: AstNode<Language = JsLanguage> + 'static,
{
fn text_range(&self) -> TextRange {
self.0.range()
}
}
impl<N> Queryable for Typed<N>
where
N: AstNode<Language = JsLanguage> + 'static,
{
type Input = JsSyntaxNode;
type Output = N;
type Language = JsLanguage;
type Services = TypedService;
fn build_visitor(analyzer: &mut impl AddVisitor<JsLanguage>, _root: &AnyJsRoot) {
analyzer.add_visitor(Phases::Semantic, SyntaxVisitor::default);
}
fn key() -> QueryKey<Self::Language> {
QueryKey::Syntax(N::KIND_SET)
}
fn unwrap_match(_: &ServiceBag, node: &Self::Input) -> Self::Output {
N::unwrap_cast(node.clone())
}
}