feat(types): provide strong typing for locales (#363)

1 files changed, 33 insertions, 0 deletions

diff --git a/src/definitions/system.ts b/src/definitions/system.ts
new file mode 100644
index 00000000..5c9039b4
--- /dev/null
+++ b/src/definitions/system.ts
@@ -0,0 +1,33 @@
+import { allOf } from './utils';
+
+/**
+ * The possible definitions related to files and the system.
+ */
+export interface SystemDefinitions {
+  /**
+   * Returns some common file paths.
+   */
+  directoryPaths: string[];
+  /**
+   * The mime type definitions with some additional information.
+   */
+  mimeTypes: { [mimeType: string]: SystemMimeTypeEntryDefinitions };
+}
+
+/**
+ * The mime type entry details.
+ */
+export interface SystemMimeTypeEntryDefinitions {
+  source?: string;
+  extensions?: string[];
+  compressible?: boolean;
+  charset?: string;
+}
+
+/**
+ * Internal: A list of all keys for the SystemDefinitions.
+ */
+export const SYSTEM = allOf<keyof SystemDefinitions>()(
+  'directoryPaths',
+  'mimeTypes'
+);