# Improved participant matching with additional emails support
Closes#8991
This PR extends the participant matching system to support additional
emails in addition to primary emails for both calendar events and
messages. Previously, the system only matched participants based on
primary emails, missing matches with secondary email addresses.
- Contact creation now consider both primary and additional emails when
checking for existing contacts
- Calendar and message participant listeners now handle both primary and
additional email changes
- Added tests
## To test this PR:
Check that:
- Primary emails take precedence over additional emails in matching
- Case-insensitive email comparisons work correctly
- A contact is not created if a person already exists with the email as
its additional email
- Event listeners handle both creation and update scenarios
- Matching and unmatching logic works for complex email change scenarios
- When unmatching after a change in a primary or secondary email, events
and messages should be rematched if another person has this email as its
primary or secondary email.
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Co-authored-by: guillim <guigloo@msn.com>
eed9125945