Add initial Glint types

.glintrc.yml

@@ -0,0 +1,4 @@
+environment: ember-loose
+include:
+  - 'addon/**'
+  - 'tests/**'

README.md

@@ -31,6 +31,14 @@ except: ['camelize'] // imports all helpers except `camelize`
 only: ['camelize'] // imports only `camelize`
 ```
 
+## Glint types
+To enable Glint template typechecking for the addon, add:
+```js
+import 'ember-cli-string-helpers/glint';
+```
+anywhere you put your app's global types into, e.g. `types/global.d.ts`.
+See also [Glint documentation](https://typed-ember.gitbook.io/glint/using-glint/ember/using-addons)
+
 ## Available helpers
 
 * [`camelize`](#camelize)

glint.d.ts

@@ -0,0 +1,58 @@
+import { HelperLike } from '@glint/template';
+
+declare module '@glint/environment-ember-loose/registry' {
+  export default interface Registry {
+    camelize: HelperLike<{
+      Args: { Positional: [str: string] };
+      Return: string;
+    }>;
+    capitalize: HelperLike<{
+      Args: { Positional: [str: string] };
+      Return: string;
+    }>;
+    classify: HelperLike<{
+      Args: { Positional: [str: string] };
+      Return: string;
+    }>;
+    dasherize: HelperLike<{
+      Args: { Positional: [str: string] };
+      Return: string;
+    }>;
+    'html-safe': HelperLike<{
+      Args: { Positional: [str: string] };
+      Return: string;
+    }>;
+    humanize: HelperLike<{
+      Args: { Positional: [str: string] };
+      Return: string;
+    }>;
+    lowercase: HelperLike<{
+      Args: { Positional: [str: string] };
+      Return: string;
+    }>;
+    titleize: HelperLike<{
+      Args: { Positional: [str: string] };
+      Return: string;
+    }>;
+    trim: HelperLike<{
+      Args: { Positional: [str: string] };
+      Return: string;
+    }>;
+    truncate: HelperLike<{
+      Args: { Positional: [str: string | undefined, characterLimit?: number, useEllipsis?: boolean] };
+      Return: string;
+    }>;
+    underscore: HelperLike<{
+      Args: { Positional: [str: string] };
+      Return: string;
+    }>;
+    uppercase: HelperLike<{
+      Args: { Positional: [str: string] };
+      Return: string;
+    }>;
+    w: HelperLike<{
+      Args: { Positional: [str: string | string[]] };
+      Return: string[];
+    }>;
+  }
+}

package.json

@@ -4,6 +4,7 @@
   "description": "String helpers for Ember",
   "scripts": {
     "build": "ember build",
+    "glint": "node node_modules/@glint/core/bin/glint.js",
     "lint:hbs": "ember-template-lint .",
     "lint:js": "eslint .",
     "start": "ember serve",
@@ -16,6 +17,8 @@
   "devDependencies": {
     "@ember/optional-features": "^2.0.0",
     "@embroider/test-setup": "^0.37.0",
+    "@glint/core": "^0.9.7",
+    "@glint/environment-ember-loose": "^0.9.7",
     "broccoli-asset-rev": "^3.0.0",
     "chai": "^4.2.0",
     "ember-ajax": "^5.0.0",