feat: Added rule to enforce quotes type (#475)

* feat: new quotes rule

* chore: change error messaging to specifying string literals

Co-authored-by: Angelica Bocanegra <[email protected]>

Author: ab-angelica

.README/README.md

@@ -174,6 +174,7 @@ When `true`, only checks files with a [`@flow` annotation](http://flowtype.org/d
 {"gitdown": "include", "file": "./rules/no-weak-types.md"}
 {"gitdown": "include", "file": "./rules/object-type-curly-spacing.md"}
 {"gitdown": "include", "file": "./rules/object-type-delimiter.md"}
+{"gitdown": "include", "file": "./rules/quotes.md"}
 {"gitdown": "include", "file": "./rules/require-compound-type-alias.md"}
 {"gitdown": "include", "file": "./rules/require-exact-type.md"}
 {"gitdown": "include", "file": "./rules/require-indexer-name.md"}

.README/rules/quotes.md

@@ -0,0 +1,12 @@
+### `quotes`
+
+Enforces single quotes or double quotes around string literals.
+
+#### Options
+
+The rule has string options of:
+
+* `"double"` (default) requires double quotes around string literals.
+* `"single"` requires single quotes around string literals.
+
+<!-- assertions quotes -->

README.md

@@ -36,6 +36,7 @@
         * [`no-weak-types`](#eslint-plugin-flowtype-rules-no-weak-types)
         * [`object-type-curly-spacing`](#eslint-plugin-flowtype-rules-object-type-curly-spacing)
         * [`object-type-delimiter`](#eslint-plugin-flowtype-rules-object-type-delimiter)
+        * [`quotes`](#eslint-plugin-flowtype-rules-quotes)
         * [`require-compound-type-alias`](#eslint-plugin-flowtype-rules-require-compound-type-alias)
         * [`require-exact-type`](#eslint-plugin-flowtype-rules-require-exact-type)
         * [`require-indexer-name`](#eslint-plugin-flowtype-rules-require-indexer-name)
@@ -2836,12 +2837,79 @@ type Foo = { a: Foo, b: Bar }
 
 
 
+<a name="eslint-plugin-flowtype-rules-quotes"></a>
+### <code>quotes</code>
+
+Enforces single quotes or double quotes around string literals.
+
+<a name="eslint-plugin-flowtype-rules-quotes-options-3"></a>
+#### Options
+
+The rule has string options of:
+
+* `"double"` (default) requires double quotes around string literals.
+* `"single"` requires single quotes around string literals.
+
+The following patterns are considered problems:
+
+```js
+type T = 'hi'
+// Message: String literals must use double quote.
+
+// Options: ["double"]
+type T = { test: 'hello' | 'test' }
+// Message: String literals must use double quote.
+// Message: String literals must use double quote.
+
+// Options: ["double"]
+type T = { test: "hello" | 'test', t: 'hello' }
+// Message: String literals must use double quote.
+// Message: String literals must use double quote.
+
+// Options: ["single"]
+type T = "hi"
+// Message: String literals must use single quote.
+
+// Options: ["single"]
+type T = { test: "hello" | "test" }
+// Message: String literals must use single quote.
+// Message: String literals must use single quote.
+
+// Options: ["single"]
+type T = { test: "hello" | 'test', t: 'hello' }
+// Message: String literals must use single quote.
+```
+
+The following patterns are not considered problems:
+
+```js
+// Options: ["double"]
+type T = "hi"
+
+// Options: ["double"]
+type T = { test: "hello" | "test" }
+
+// Options: ["double"]
+type T = { test: "hello" | "test", t: "hello" }
+
+// Options: ["single"]
+type FooType = 'hi'
+
+// Options: ["single"]
+type T = { test: 'hello' | 'test' }
+
+// Options: ["single"]
+type T = { test: 'hello' | 'test', t: 'hello' }
+```
+
+
+
 <a name="eslint-plugin-flowtype-rules-require-compound-type-alias"></a>
 ### <code>require-compound-type-alias</code>
 
 Requires to make a type alias for all [union](https://flow.org/en/docs/types/unions/) and [intersection](https://flow.org/en/docs/types/intersections/) types. If these are used in "raw" forms it might be tempting to just copy & paste them around the code. However, this brings sort of a source code pollution and unnecessary changes on several parts when these compound types need to be changed.
 
-<a name="eslint-plugin-flowtype-rules-require-compound-type-alias-options-3"></a>
+<a name="eslint-plugin-flowtype-rules-require-compound-type-alias-options-4"></a>
 #### Options
 
 The rule has two options:
@@ -2935,7 +3003,7 @@ _The `--fix` option on the command line automatically fixes problems reported by
 
 This rule enforces [exact object types](https://flow.org/en/docs/types/objects/#toc-exact-object-types).
 
-<a name="eslint-plugin-flowtype-rules-require-exact-type-options-4"></a>
+<a name="eslint-plugin-flowtype-rules-require-exact-type-options-5"></a>
 #### Options
 
 The rule has one string option:
@@ -3088,7 +3156,7 @@ _The `--fix` option on the command line automatically fixes problems reported by
 
 This rule validates Flow object indexer name.
 
-<a name="eslint-plugin-flowtype-rules-require-indexer-name-options-5"></a>
+<a name="eslint-plugin-flowtype-rules-require-indexer-name-options-6"></a>
 #### Options
 
 The rule has a string option:
@@ -3133,7 +3201,7 @@ type foo = { [string]: number };
 
 This rule enforces explicit inexact object types.
 
-<a name="eslint-plugin-flowtype-rules-require-inexact-type-options-6"></a>
+<a name="eslint-plugin-flowtype-rules-require-inexact-type-options-7"></a>
 #### Options
 
 The rule has one string option:
@@ -3242,7 +3310,7 @@ type foo = number;
 
 Requires that all function parameters have type annotations.
 
-<a name="eslint-plugin-flowtype-rules-require-parameter-type-options-7"></a>
+<a name="eslint-plugin-flowtype-rules-require-parameter-type-options-8"></a>
 #### Options
 
 You can skip all arrow functions by providing the `excludeArrowFunctions` option with `true`.
@@ -3602,7 +3670,7 @@ function Foo(props: {}) { return <p /> }
 
 Requires that functions have return type annotation.
 
-<a name="eslint-plugin-flowtype-rules-require-return-type-options-8"></a>
+<a name="eslint-plugin-flowtype-rules-require-return-type-options-9"></a>
 #### Options
 
 You can skip all arrow functions by providing the `excludeArrowFunctions` option with `true`.
@@ -3964,7 +4032,7 @@ async function * foo(): AsyncIterable<number> { yield 2; }
 
 Requires all type declarations to be at the top of the file, after any import declarations.
 
-<a name="eslint-plugin-flowtype-rules-require-types-at-top-options-9"></a>
+<a name="eslint-plugin-flowtype-rules-require-types-at-top-options-10"></a>
 #### Options
 
 The rule has a string option:
@@ -4041,7 +4109,7 @@ This rule validates Flow file annotations.
 
 This rule can optionally report missing or missed placed annotations, common typos (e.g. `// @floww`), and enforce a consistent annotation style.
 
-<a name="eslint-plugin-flowtype-rules-require-valid-file-annotation-options-10"></a>
+<a name="eslint-plugin-flowtype-rules-require-valid-file-annotation-options-11"></a>
 #### Options
 
 The rule has a string option:
@@ -4234,7 +4302,7 @@ a;
 
 Requires that all variable declarators have type annotations.
 
-<a name="eslint-plugin-flowtype-rules-require-variable-type-options-11"></a>
+<a name="eslint-plugin-flowtype-rules-require-variable-type-options-12"></a>
 #### Options
 
 You can exclude variables that match a certain regex by using `excludeVariableMatch`.
@@ -4401,7 +4469,7 @@ _The `--fix` option on the command line automatically fixes problems reported by
 
 Enforces natural, case-insensitive sorting of Object annotations.
 
-<a name="eslint-plugin-flowtype-rules-sort-keys-options-12"></a>
+<a name="eslint-plugin-flowtype-rules-sort-keys-options-13"></a>
 #### Options
 
 The first option specifies sort order.
@@ -4753,7 +4821,7 @@ _The `--fix` option on the command line automatically fixes problems reported by
 
 Enforces consistent spacing after the type annotation colon.
 
-<a name="eslint-plugin-flowtype-rules-space-after-type-colon-options-13"></a>
+<a name="eslint-plugin-flowtype-rules-space-after-type-colon-options-14"></a>
 #### Options
 
 This rule has a string argument.
@@ -6122,7 +6190,7 @@ type foo = {test: number}; type bar = {...$Exact<foo>}
 
 Enforces a consistent naming pattern for type aliases.
 
-<a name="eslint-plugin-flowtype-rules-type-id-match-options-14"></a>
+<a name="eslint-plugin-flowtype-rules-type-id-match-options-15"></a>
 #### Options
 
 This rule requires a text RegExp:
@@ -6183,7 +6251,7 @@ import {type T, type U, type V} from '...';
 import type {T, U, V} from '...';
 ```
 
-<a name="eslint-plugin-flowtype-rules-type-import-style-options-15"></a>
+<a name="eslint-plugin-flowtype-rules-type-import-style-options-16"></a>
 #### Options
 
 The rule has a string option:

src/index.js

@@ -20,6 +20,7 @@ import noInternalFlowType from './rules/noInternalFlowType';
 import noMixed from './rules/noMixed';
 import objectTypeCurlySpacing from './rules/objectTypeCurlySpacing';
 import objectTypeDelimiter from './rules/objectTypeDelimiter';
+import quotes from './rules/quotes';
 import requireIndexerName from './rules/requireIndexerName';
 import requireCompoundTypeAlias from './rules/requireCompoundTypeAlias';
 import requireInexactType from './rules/requireInexactType';
@@ -66,6 +67,7 @@ const rules = {
   'no-weak-types': noWeakTypes,
   'object-type-curly-spacing': objectTypeCurlySpacing,
   'object-type-delimiter': objectTypeDelimiter,
+  quotes,
   'require-compound-type-alias': requireCompoundTypeAlias,
   'require-exact-type': requireExactType,
   'require-indexer-name': requireIndexerName,
@@ -117,6 +119,7 @@ export default {
     'no-weak-types': 0,
     'object-type-curly-spacing': 0,
     'object-type-delimiter': 0,
+    quotes: 0,
     'require-compound-type-alias': 0,
     'require-exact-type': 0,
     'require-parameter-type': 0,

src/rules/quotes.js

@@ -0,0 +1,51 @@
+const schema = [
+  {
+    enum: ['double', 'single'],
+    type: 'string',
+  },
+];
+
+const meta = {
+  fixable: 'code',
+};
+
+const create = (context) => {
+  const double = (context.options[0] || 'double') === 'double';
+  const sourceCode = context.getSourceCode();
+
+  return {
+    StringLiteralTypeAnnotation (node) {
+      if (double && sourceCode.text[node.range[0]] !== '"') {
+        // double
+        context.report({
+          fix: (fixer) => {
+            return [
+              fixer.replaceTextRange([node.range[0], node.range[0] + 1], '"'),
+              fixer.replaceTextRange([node.range[1] - 1, node.range[1]], '"'),
+            ];
+          },
+          message: 'String literals must use double quote.',
+          node,
+        });
+      } else if (!double && sourceCode.text[node.range[0]] !== '\'') {
+        // single
+        context.report({
+          fix: (fixer) => {
+            return [
+              fixer.replaceTextRange([node.range[0], node.range[0] + 1], '\''),
+              fixer.replaceTextRange([node.range[1] - 1, node.range[1]], '\''),
+            ];
+          },
+          message: 'String literals must use single quote.',
+          node,
+        });
+      }
+    },
+  };
+};
+
+export default {
+  create,
+  meta,
+  schema,
+};