Added a management command: 'check_person_names_and_aliases'.

When we started explicitly listing draft and RFC author names on the documemnt
pages in commit [18549], it uncovered a number of links that 404'ed because
name alias entries were missing for some person entries, in particular for
authors of early RFCs and drafts.  Adding such alias entries can be done
automatically in most cases.  This new management command will do so, and also
report (and in some cases fix) additional issues, such as names incorrectly
incorporating '<>', name aliases that are email addresses, and more.

Run with -v2 (verbosity 2) it will report all found names and aliases for each
issue type, and run with -f it will fix those that can be automatically fixed.
 - Legacy-Id: 18599
Note: SVN reference [18549] has been migrated to Git commit 2899c2a65d

ietf/person/management/commands/check_person_names_and_aliases.py

@@ -0,0 +1,98 @@
+# Copyright The IETF Trust 2018-2020, All Rights Reserved
+# -*- coding: utf-8 -*-
+
+
+from tqdm import tqdm
+
+from django.core.management.base import BaseCommand
+
+import debug                            # pyflakes:ignore
+
+from ietf.person.models import Person, Alias
+
+
+class Command(BaseCommand):
+    help = ("""
+        Check for missing Alias records, and create missing record if requested.
+        Check for certain bad Alias records, and fix if requested.
+        Check for certain bad strings in Person names and fix if requested.
+        """)
+
+    def add_arguments(self, parser):
+        parser.add_argument('-f', '--fix', action='store_true', default=False,
+            help="Create missing aliases")
+
+    def handle(self, *args, **options):
+        verbosity = options['verbosity']
+        fix = options['fix']
+        system_names = ['(System)', 'IAB', 'IANA', ]
+        missing = []
+        badalias = []
+        badname = []
+        onename = []
+        addrname = []
+        for person in tqdm(Person.objects.all()):
+            email = person.email()
+            # Person names with junk
+            if '<>' in person.name:
+                name = person.name
+                if fix:
+                    person.name = name.replace('<>', '').strip()
+                    person.save()
+                badname.append((name, person.name, email))
+            if '@' in person.name:
+                # Can't fix this here, needs human intervention
+                addrname.append((person.name, '-', email))
+            #                    
+            alias_names = { n for n in [ person.name, person.ascii, person.plain_name(), person.plain_ascii(), ] if n and (' ' in n and not '@' in n) }
+            aliases = Alias.objects.filter(name__in=alias_names, person=person)
+            # Aliases that look like email addresses
+            for alias in aliases:
+                if '@' in alias.name:
+                    name = alias.name
+                    aliases = aliases.exclude(pk=alias.pk)
+                    if fix:
+                        alias.delete()
+                    badalias.append((name, '-', email))
+            # Missing aliases
+            if aliases.count() < len(alias_names):
+                for name in alias_names - { a.name for a in aliases }:
+                    if fix:
+                        Alias.objects.create(person=person, name=name)
+                    missing.append((name, person.name, email))
+            if not ' ' in person.name and not person.name in system_names:
+                name = person.name
+                # Names using Chinese ideographs don't necessary have spaces
+                if (all( 0x4E00 <= ord(c) <= 0x9FFF for c in name) or # Han
+                    all( 0xAC00 <= ord(c) <= 0xD7AF for c in name) ): # HanGul
+                        pass
+                else:
+                    onename.append((name, '-', email))
+        
+        action = "Fixed" if fix else "Found"
+        #
+        print("\n  %s %d bad names." % (action, len(badname)))
+        if verbosity > 1:
+            for n in badname:
+                print(n)
+        print("\n  %s %d missing aliases." % (action, len(missing)))
+        if verbosity > 1:
+            for n in missing:
+                print(n)
+        print("\n  %s %d bad aliases." % (action, len(badalias)))
+        if verbosity > 1:
+            for n in badalias:
+                print(n)
+        print("\n  Found %d names that could be email addresses." % (len(addrname)))
+        if verbosity > 1:
+            for n in addrname:
+                print(n)
+        else:
+            print("  Use -v2 to list them.")
+        print("\n  Found %d single-word names (names with no space)." % (len(onename), ))
+        if verbosity > 1:
+            for n in onename:
+                print(n)
+        else:
+            print("  Use -v2 to list them.")
+