DEV: Improve user generic bulk importer anonymization (#27307)

* DEV: Improve user generic bulk importer anonymization

Add support for properly anonymizing:
 - email
 - date_of_birth
 - location
 - website
 - bio

* DEV: Remove uneeded anon username check in `import_user_emails`

script/bulk_import/generic_bulk.rb

@@ -415,17 +415,11 @@ class BulkImport::Generic < BulkImport::Base
       end
 
       if row["anonymized"] == 1
-        while true
-          anon_suffix = (SecureRandom.random_number * 100_000_000).to_i
-          break if !@anonymized_user_suffixes.include?(anon_suffix)
-        end
-
-        row["username"] = "anon_#{anon_suffix}"
+        row["username"] = "anon_#{anon_username_suffix}"
         row["email"] = "#{row["username"]}#{UserAnonymizer::EMAIL_SUFFIX}"
         row["name"] = nil
         row["registration_ip_address"] = nil
-
-        @anonymized_user_suffixes << anon_suffix
+        row["date_of_birth"] = nil
       end
 
       {
@@ -455,7 +449,7 @@ class BulkImport::Generic < BulkImport::Base
     existing_user_ids = UserEmail.pluck(:user_id).to_set
 
     users = query(<<~SQL)
-      SELECT id, email, created_at
+      SELECT id, email, created_at, anonymized
       FROM users
       ORDER BY id
     SQL
@@ -464,6 +458,11 @@ class BulkImport::Generic < BulkImport::Base
       user_id = user_id_from_imported_id(row["id"])
       next if user_id && existing_user_ids.include?(user_id)
 
+      if row["anonymized"] == 1
+        username = username_from_id(user_id)
+        row["email"] = "#{username}#{UserAnonymizer::EMAIL_SUFFIX}"
+      end
+
       { user_id: user_id, email: row["email"], created_at: to_datetime(row["created_at"]) }
     end
 
@@ -474,7 +473,7 @@ class BulkImport::Generic < BulkImport::Base
     puts "", "Importing user profiles..."
 
     users = query(<<~SQL)
-      SELECT id, bio, location
+      SELECT id, bio, location, website, anonymized
       FROM users
       ORDER BY id
     SQL
@@ -485,7 +484,13 @@ class BulkImport::Generic < BulkImport::Base
       user_id = user_id_from_imported_id(row["id"])
       next if user_id && existing_user_ids.include?(user_id)
 
-      { user_id: user_id, bio_raw: row["bio"], location: row["location"] }
+      if row["anonymized"] == 1
+        row["bio"] = nil
+        row["location"] = nil
+        row["website"] = nil
+      end
+
+      { user_id: user_id, bio_raw: row["bio"], location: row["location"], website: row["website"] }
     end
 
     users.close
@@ -2408,6 +2413,16 @@ class BulkImport::Generic < BulkImport::Base
   def to_boolean(value)
     value == 1
   end
+
+  def anon_username_suffix
+    while true
+      suffix = (SecureRandom.random_number * 100_000_000).to_i
+      break if @anonymized_user_suffixes.exclude?(suffix)
+    end
+
+    @anonymized_user_suffixes << suffix
+    suffix
+  end
 end
 
 BulkImport::Generic.new(ARGV[0], ARGV[1]).start