feat(rome_js_analyze): noNamespace (#4283)

Co-authored-by: Victorien ELVINGER <victorien@elvinger.fr>

crates/rome_diagnostics_categories/src/categories.rs

@@ -98,6 +98,7 @@ define_categories! {
     "lint/nursery/noSvgWithoutTitle": "https://docs.rome.tools/lint/rules/noSvgWithoutTitle",
     "lint/nursery/noUselessCatch": "https://docs.rome.tools/lint/rules/noUselessCatch",
 "lint/nursery/noParameterAssign": "https://docs.rome.tools/lint/rules/noParameterAssign",
+"lint/nursery/noNamespace": "https://docs.rome.tools/lint/rules/noNamespace",
     // Insert new nursery rule here
     "lint/nursery/noRedeclaration": "https://docs.rome.tools/lint/rules/noRedeclaration",
     "lint/nursery/useNamespaceKeyword": "https://docs.rome.tools/lint/rules/useNamespaceKeyword",

crates/rome_js_analyze/src/analyzers/nursery/no_namespace.rs

@@ -0,0 +1,83 @@
+use rome_analyze::{context::RuleContext, declare_rule, Ast, Rule, RuleDiagnostic};
+use rome_console::markup;
+use rome_js_syntax::TsModuleDeclaration;
+use rome_rowan::AstNode;
+
+declare_rule! {
+    /// Disallow the use of TypeScript's `namespace`s.
+    ///
+    /// Namespaces are an old way to organize your code in TypeScript.
+    /// They are not recommended anymore and should be replaced by ES6 modules
+    /// (the `import`/`export` syntax).
+    ///
+    /// Source: https://typescript-eslint.io/rules/no-namespace
+    ///
+    /// ## Examples
+    ///
+    /// ### Invalid
+    ///
+    /// ```ts,expect_diagnostic
+    /// module foo {}
+    /// ```
+    ///
+    /// ```ts,expect_diagnostic
+    /// declare module foo {}
+    /// ```
+    ///
+    /// ```ts,expect_diagnostic
+    /// namespace foo {}
+    /// ```
+    ///
+    /// ```ts,expect_diagnostic
+    /// declare namespace foo {}
+    /// ```
+    ///
+    /// ## Valid
+    ///
+    /// ```ts
+    /// import foo from 'foo';
+    /// export { bar };
+    /// ```
+    ///
+    /// ```ts
+    /// declare global {}
+    /// ```
+    ///
+    /// ```ts
+    /// declare module 'foo' {}
+    /// ```
+    ///
+    pub(crate) NoNamespace {
+        version: "12.0.0",
+        name: "noNamespace",
+        recommended: true,
+    }
+}
+
+impl Rule for NoNamespace {
+    type Query = Ast<TsModuleDeclaration>;
+    type State = ();
+    type Signals = Option<Self::State>;
+    type Options = ();
+
+    fn run(_: &RuleContext<Self>) -> Self::Signals {
+        Some(())
+    }
+
+    fn diagnostic(ctx: &RuleContext<Self>, _: &Self::State) -> Option<RuleDiagnostic> {
+        let node = ctx.query();
+
+        Some(
+            RuleDiagnostic::new(
+                rule_category!(),
+                node.syntax().text_trimmed_range(),
+                markup! {
+                    "TypeScript's namespaces are an oudated way to organize code."
+                },
+            )
+            .note(markup! {
+                "Prefer the ES6 modules (import/export) over namespaces."
+            }),
+        )
+    }
+}

crates/rome_js_analyze/tests/specs/nursery/noNamespace/invalid.ts

@@ -0,0 +1,5 @@
+module foo {}
+declare module foo {}
+
+namespace foo {}
+declare namespace foo {}

crates/rome_js_analyze/tests/specs/nursery/noNamespace/invalid.ts.snap

@@ -0,0 +1,79 @@
+---
+source: crates/rome_js_analyze/tests/spec_tests.rs
+expression: invalid.ts
+---
+# Input
+```js
+module foo {}
+declare module foo {}
+
+namespace foo {}
+declare namespace foo {}
+
+```
+
+# Diagnostics
+```
+invalid.ts:1:1 lint/nursery/noNamespace ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+  ! TypeScript's namespaces are an oudated way to organize code.
+  
+  > 1 │ module foo {}
+      │ ^^^^^^^^^^^^^
+    2 │ declare module foo {}
+    3 │ 
+  
+  i Prefer the ES6 modules (import/export) over namespaces.
+  
+
+```
+
+```
+invalid.ts:2:9 lint/nursery/noNamespace ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+  ! TypeScript's namespaces are an oudated way to organize code.
+  
+    1 │ module foo {}
+  > 2 │ declare module foo {}
+      │         ^^^^^^^^^^^^^
+    3 │ 
+    4 │ namespace foo {}
+  
+  i Prefer the ES6 modules (import/export) over namespaces.
+  
+
+```
+
+```
+invalid.ts:4:1 lint/nursery/noNamespace ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+  ! TypeScript's namespaces are an oudated way to organize code.
+  
+    2 │ declare module foo {}
+    3 │ 
+  > 4 │ namespace foo {}
+      │ ^^^^^^^^^^^^^^^^
+    5 │ declare namespace foo {}
+    6 │ 
+  
+  i Prefer the ES6 modules (import/export) over namespaces.
+  
+
+```
+
+```
+invalid.ts:5:9 lint/nursery/noNamespace ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+  ! TypeScript's namespaces are an oudated way to organize code.
+  
+    4 │ namespace foo {}
+  > 5 │ declare namespace foo {}
+      │         ^^^^^^^^^^^^^^^^
+    6 │ 
+  
+  i Prefer the ES6 modules (import/export) over namespaces.
+  
+
+```
+
+

crates/rome_js_analyze/tests/specs/nursery/noNamespace/valid.ts

@@ -0,0 +1,7 @@
+/* should not generate diagnostics */
+
+export {};
+
+declare global {}
+
+declare module "foo" {}

crates/rome_js_analyze/tests/specs/nursery/noNamespace/valid.ts.snap

@@ -0,0 +1,17 @@
+---
+source: crates/rome_js_analyze/tests/spec_tests.rs
+expression: valid.ts
+---
+# Input
+```js
+/* should not generate diagnostics */
+
+export {};
+
+declare global {}
+
+declare module "foo" {}
+
+```
+
+