🐛 Fix attachment regex to allow lowercase characters and underscores

Also, since we're now being less strict with the regex, I'll add the restriction that the attachment should be the first thing in the message to help avoid false positives. HOPEFULLY this assumption won't bite me in the ass later

As always we also have to check for the LTR / RTL characters because whatsapp really loves them

Closes #260

src/parser.ts

@@ -19,7 +19,8 @@ const regexParserSystem = new RegExp(
   sharedRegex.source + messageRegex.source,
   'i',
 );
-const regexAttachment = /<.+:(.+)>|([A-Z\d-]+\.\w+)\s[(<].+[)>]/;
+const regexAttachment =
+  /^(?:\u200E|\u200F)*(?:<.+:(.+)>|([\w-]+\.\w+)\s[(<].+[)>])/;
 
 /**
  * Takes an array of lines and detects the lines that are part of a previous

tests/parser.test.ts

@@ -207,11 +207,14 @@ describe('parser.js', () => {
           '3/6/18, 1:55 p.m. - a: IMG-20210428-WA0001.jpg (file attached)';
         const format3 =
           '3/6/18, 1:55 p.m. - a: 2015-08-04-PHOTO-00004762.jpg <‎attached>';
+        const format4 =
+          '3/6/18, 1:55 p.m. - a: ‎4f2680f1db95a8454775cc2eefc95bfc.jpg (Datei angehängt)\nDir auch frohe Ostern.';
         const messages = [
           { system: false, msg: format1 },
           { system: false, msg: '3/6/18, 1:55 p.m. - a: m' },
           { system: false, msg: format2 },
           { system: false, msg: format3 },
+          { system: false, msg: format4 },
         ];
         const parsedWithoutAttachments = parseMessages(messages, {
           parseAttachments: false,
@@ -245,6 +248,12 @@ describe('parser.js', () => {
             '2015-08-04-PHOTO-00004762.jpg',
           );
         });
+
+        it('should correctly parse the attachment string with format #4', () => {
+          expect(parsedWithAttachments[4]?.attachment?.fileName).toBe(
+            '4f2680f1db95a8454775cc2eefc95bfc.jpg',
+          );
+        });
       });
     });
   });