feat(file): Added functionality to retrieve magic bytes from files and detect file types using magic bytes.

ts/classes.metadata.ts

@@ -31,10 +31,24 @@ export class MetaData {
   public async getFileType(optionsArg?: {
     useFileExtension?: boolean;
     useMagicBytes?: boolean;
-  }): Promise<string> {
-    if ((optionsArg && optionsArg.useFileExtension) || optionsArg.useFileExtension === undefined) {
-      return plugins.path.extname(this.fileRef.name);
+  }): Promise<plugins.smartmime.IFileTypeResult | undefined> {
+    if ((optionsArg && optionsArg.useFileExtension) || !optionsArg) {
+      const fileType = await plugins.smartmime.detectMimeType({
+        path: this.fileRef.name,
+      });
+
+      return fileType;
     }
+    if (optionsArg && optionsArg.useMagicBytes) {
+      const fileType = await plugins.smartmime.detectMimeType({
+        buffer: await this.fileRef.getMagicBytes({
+          length: 100,
+        })
+      });
+
+      return fileType;
+    }
+    throw new Error('optionsArg.useFileExtension and optionsArg.useMagicBytes cannot both be false');
   }
 
   /**