Remove irdi_parser dependency

Previously, we used the [irdi_parser] project as
a dependency to parse IRDI identifiers.
However, we had problems getting a fully automatic
building of a Docker image to run, as it failed
at this dependency for some reason.

We therefore decide to remove the dependency, but
still refer to the source of the regular
expression used to match the IRDI.

[irdi_parser](https://github.com/moritzsommer/irdi-parser)

semantic_id_resolver/resolver.py

@@ -3,9 +3,9 @@
 from typing import Optional, Dict
 from urllib.parse import urlparse
 import json
+import re
 
 import dns.resolver
-from parser.irdi_parser import IRDIParser
 
 
 class DebugSemanticMatchingServiceEndpoints:
@@ -35,16 +35,39 @@ def get_debug_endpoint(self, semantic_id: str) -> Optional[str]:
         return self.debug_endpoints.get(semantic_id)
 
 
+def matches_irdi(s: str) -> bool:
+    # (2024-09-11, s-heppner)
+    # This pattern stems from the wonderful IRDI-Parser project:
+    # https://github.com/moritzsommer/irdi-parser
+    # Sadly, we had problems with Docker installing and finding the package, so we decided to eliminate the dependency.
+    irdi_pattern = re.compile(
+        # International Code Designator (4 digits)
+        r'^(?P<icd>\d{4})-'
+        # Organization Identifier (4 safe characters)
+        r'(?P<org_id>[a-zA-Z0-9]{4})'
+        # Optional Additional Information (4 safe characters)
+        r'(-(?P<add_info>[a-zA-Z0-9]{4}))?'
+        # Separator Character
+        r'#'
+        # Code Space Identifier (2 safe characters)
+        r'(?P<csi>[a-zA-Z0-9]{2})-'
+        # Item Code (6 safe characters)
+        r'(?P<item_code>[a-zA-Z0-9]{6})'
+        # Separator Character
+        r'#'
+        # Version Identifier (1 digit)
+        r'(?P<version>\d)$'
+    )
+    return bool(irdi_pattern.match(s))
+
+
 def is_iri_not_irdi(semantic_id: str) -> Optional[bool]:
     """
     :return: `True`, if `semantic_id` is an IRI, False if it is an IRDI, None for neither
     """
     # Check IRDI
-    try:
-        IRDIParser().parse(semantic_id)
+    if matches_irdi(semantic_id):
         return False
-    except ValueError:
-        pass
     # Check IRI
     parsed_url = urlparse(semantic_id)
     if parsed_url.scheme: