Add tag-adding logic

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

src/database/index.ts

@@ -1,2 +1,2 @@
 export { MEME_TYPE, memeTypePlural, Meme } from './meme';
-export { Tag } from './tag';
+export { Tag, deleteAllTags } from './tag';

src/database/tag.ts

@@ -19,4 +19,10 @@ class Tag extends Realm.Object<Tag> {
   };
 }
 
-export { Tag };
+const deleteAllTags = (realm: Realm) => {
+  realm.write(() => {
+    realm.delete(realm.objects<Tag>('Tag'));
+  });
+};
+
+export { Tag, deleteAllTags };