Fix name parsing

Author: AA-Turner

pepreader/pep0.py

@@ -59,23 +59,29 @@ class Author(object):
 
     def __init__(self, author_and_email_tuple):
         """Parse the name and email address of an author."""
+        self.first = self.last = ''
+
         name, email = author_and_email_tuple
         self.first_last = name.strip()
         self.email = email.lower()
-        last_name_fragment, suffix = self._last_name(name)
-        name_sep = name.index(last_name_fragment)
-        self.first = name[:name_sep].rstrip()
-        self.last = last_name_fragment
-        if self.last[1] == ".":
-            # Add an escape to avoid docutils turning `v.` into `22.`.
-            self.last = "\\" + self.last
-        self.suffix = suffix
-        if not self.first:
-            self.last_first = self.last
+
+        name_dict = self._parse_name(name)
+        self.suffix = name_dict.get("suffix")
+        if name_dict.get("name"):
+            self.last_first = name_dict["name"]
+            self.nick = name_dict["name"]
         else:
+            self.first = name_dict["forename"].rstrip()
+            self.last = name_dict["surname"]
+            if self.last[1] == ".":
+                # Add an escape to avoid docutils turning `v.` into `22.`.
+                self.last = "\\" + self.last
             self.last_first = ", ".join([self.last, self.first])
-            if self.suffix:
-                self.last_first += ", " + self.suffix
+            self.nick = self.last
+
+        if self.suffix:
+            self.last_first += ", " + self.suffix
+
         if self.last == "van Rossum":
             # Special case for our beloved BDFL. :)
             if self.first == "Guido":
@@ -85,8 +91,6 @@ def __init__(self, author_and_email_tuple):
             else:
                 raise ValueError(f"unknown van Rossum {self}!")
             self.last_first += f" ({self.nick})"
-        else:
-            self.nick = self.last
 
     def __hash__(self):
         return hash(self.first_last)
@@ -107,7 +111,7 @@ def sort_by(self):
         return unicodedata.normalize("NFKD", base)
 
     @staticmethod
-    def _last_name(full_name):
+    def _parse_name(full_name):
         """Find the last name (or nickname) of a full name.
 
         If no last name (e.g, 'Aahz') then return the full name.  If there is
@@ -116,19 +120,50 @@ def _last_name(full_name):
         through a comma, then drop the suffix.
 
         """
-        name_partition = full_name.partition(",")
-        no_suffix = name_partition[0].strip()
-        suffix = name_partition[2].strip()
-        name_parts = no_suffix.split()
-        part_count = len(name_parts)
-        if part_count == 1 or part_count == 2:
-            return name_parts[-1], suffix
-        else:
-            assert part_count > 2
+        possible_suffixes = ["Jr", "Jr.", "II", "III"]
+        special_cases = ["The Python core team and community"]
+
+        if full_name in special_cases:
+            return {"name": full_name}
+
+        suffix_partition = full_name.partition(",")
+        pre_suffix = suffix_partition[0].strip()
+        suffix = suffix_partition[2].strip()
+
+        name_parts = pre_suffix.split(" ")
+        num_parts = len(name_parts)
+        name = {"suffix": suffix}
+
+        if num_parts == 0:
+            raise ValueError("Name is empty!")
+        elif num_parts == 1:
+            name.update({"name": name_parts[0]})
+        elif num_parts == 2:
+            name.update({"forename": name_parts[0], "surname": name_parts[1]})
+        elif num_parts > 2:
+            # handles III etc.
+            if name_parts[-1] in possible_suffixes:
+                new_suffix = " ".join([*name_parts[-1:], suffix]).strip()
+                name_parts.pop(-1)
+                name.update(suffix=new_suffix)
+
+            # handles von, van, v. etc.
             if name_parts[-2].islower():
-                return " ".join(name_parts[-2:]), suffix
+                forename = " ".join(name_parts[:-2])
+                surname = " ".join(name_parts[-2:])
+                name.update({"forename": forename, "surname": surname})
+            # handles double surnames after a middle initial (e.g.
+            elif any(s.endswith(".") for s in name_parts):
+                split_position = [i for i, x in enumerate(name_parts) if x.endswith(".")][-1] + 1
+                forename = " ".join(name_parts[:split_position])
+                surname = " ".join(name_parts[split_position:])
+                name.update({"forename": forename, "surname": surname})
             else:
-                return name_parts[-1], suffix
+                forename = " ".join(name_parts[:-1])
+                surname = " ".join(name_parts[-1:])
+                name.update({"forename": forename, "surname": surname})
+
+        return name
 
 
 class PEP(object):