Enhance import-style rule with auto-fix capability

- Updated the `import-style` rule to include an `autoFix` option, allowing automatic fixing of import styles.
- Modified the rule's documentation to reflect the new `autoFix` feature and its default behavior.
- Added test cases to verify the functionality of the new auto-fix feature for various import scenarios.

This change improves usability by enabling automatic corrections for import style violations.

Author: CasperEngl

Diff for: docs/rules/import-style.md

@@ -2,6 +2,8 @@
 
 💼 This rule is enabled in the ✅ `recommended` [config](https://github.com/sindresorhus/eslint-plugin-unicorn#preset-configs-eslintconfigjs).
 
+🔧 This rule is automatically fixable by the [`--fix` CLI option](https://eslint.org/docs/latest/user-guide/command-line-interface#--fix).
+
 <!-- end auto-generated rule header -->
 <!-- Do not manually modify this header. Run: `npm run fix:eslint-docs` -->
 
@@ -99,3 +101,19 @@ Type: `boolean`\
 Default: `true`
 
 Pass `"checkRequire": false` to disable linting of `require` calls completely.
+
+### autoFix
+
+Type: `boolean`\
+Default: `true`
+
+Pass `"autoFix": false` to disable automatic fixing of import styles. When disabled, the rule will only report violations without attempting to fix them.
+
+```js
+"unicorn/import-style": [
+	"error",
+	{
+		"autoFix": false
+	}
+]
+```

Diff for: readme.md

@@ -123,7 +123,7 @@ If you don't use the preset, ensure you use the same `env` and `parserOptions` c
 | [expiring-todo-comments](docs/rules/expiring-todo-comments.md)                                   | Add expiration conditions to TODO comments.                                                                                                                                                                       | ✅  |    |    |
 | [explicit-length-check](docs/rules/explicit-length-check.md)                                     | Enforce explicitly comparing the `length` or `size` property of a value.                                                                                                                                          | ✅  | 🔧 | 💡 |
 | [filename-case](docs/rules/filename-case.md)                                                     | Enforce a case style for filenames.                                                                                                                                                                               | ✅  |    |    |
-| [import-style](docs/rules/import-style.md)                                                       | Enforce specific import styles per module.                                                                                                                                                                        | ✅  |    |    |
+| [import-style](docs/rules/import-style.md)                                                       | Enforce specific import styles per module.                                                                                                                                                                        | ✅  | 🔧 |    |
 | [new-for-builtins](docs/rules/new-for-builtins.md)                                               | Enforce the use of `new` for all builtins, except `String`, `Number`, `Boolean`, `Symbol` and `BigInt`.                                                                                                           | ✅  | 🔧 |    |
 | [no-abusive-eslint-disable](docs/rules/no-abusive-eslint-disable.md)                             | Enforce specifying rules to disable in `eslint-disable` comments.                                                                                                                                                 | ✅  |    |    |
 | [no-anonymous-default-export](docs/rules/no-anonymous-default-export.md)                         | Disallow anonymous functions and classes as the default export.                                                                                                                                                   | ✅  |    | 💡 |

Diff for: rules/import-style.js

@@ -138,6 +138,7 @@ const create = context => {
 			checkDynamicImport = true,
 			checkExportFrom = false,
 			checkRequire = true,
+			autoFix = false,
 		} = {},
 	] = context.options;
 
@@ -183,6 +184,25 @@ const create = context => {
 			node,
 			messageId: MESSAGE_ID,
 			data,
+			fix(fixer) {
+				if (!autoFix) {
+					return;
+				}
+
+				if (node.type === 'ImportDeclaration' && allowedImportStyles.has('namespace')) {
+					const importedNames = node.specifiers
+						.filter(s => s.type === 'ImportSpecifier' || s.type === 'ImportDefaultSpecifier')
+						.map(s => s.local.name);
+
+					if (importedNames.length > 0) {
+						const namespaceIdentifier = moduleName === 'react' ? 'React' : importedNames[0];
+						return fixer.replaceText(
+							node,
+							`import * as ${namespaceIdentifier} from "${moduleName}"`,
+						);
+					}
+				}
+			},
 		});
 	};
 
@@ -322,6 +342,9 @@ const schema = {
 				extendDefaultStyles: {
 					type: 'boolean',
 				},
+				autoFix: {
+					type: 'boolean',
+				},
 				styles: {
 					$ref: '#/definitions/moduleStyles',
 				},
@@ -365,6 +388,7 @@ module.exports = {
 			description: 'Enforce specific import styles per module.',
 			recommended: true,
 		},
+		fixable: 'code',
 		schema,
 		defaultOptions: [{}],
 		messages,

Diff for: test/import-style.mjs

@@ -626,6 +626,82 @@ test({
 				},
 			}],
 		},
+
+		{
+			code: 'import {x} from "namespace"',
+			output: 'import * as x from "namespace"',
+			options: [{
+				styles: {
+					namespace: {
+						namespace: true,
+						named: false,
+					},
+				},
+				autoFix: true,
+			}],
+			errors: [namespaceError],
+		},
+		{
+			code: 'import {x, y} from "namespace"',
+			output: 'import * as x from "namespace"',
+			options: [{
+				styles: {
+					namespace: {
+						namespace: true,
+						named: false,
+					},
+				},
+				autoFix: true,
+			}],
+			errors: [namespaceError],
+		},
+		{
+			code: 'import {x as y} from "namespace"',
+			output: 'import * as y from "namespace"',
+			options: [{
+				styles: {
+					namespace: {
+						namespace: true,
+						named: false,
+					},
+				},
+				autoFix: true,
+			}],
+			errors: [namespaceError],
+		},
+		{
+			code: 'import {x} from "react"',
+			output: 'import * as React from "react"',
+			options: [{
+				styles: {
+					react: {
+						namespace: true,
+						named: false,
+					},
+				},
+				autoFix: true,
+			}],
+			errors: [{
+				messageId: 'importStyle',
+				data: {
+					allowedStyles: 'namespace',
+					moduleName: 'react',
+				},
+			}],
+		},
+		{
+			code: 'import {x} from "namespace"',
+			options: [{
+				styles: {
+					namespace: {
+						namespace: true,
+						named: false,
+					},
+				},
+				autoFix: false,
+			}],
+			errors: [namespaceError],
+		},
 	].map(test => addDefaultOptions(test)),
 });