refactor: define interfaces for Google API clients#58
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Add interface definitions for Gmail, Calendar, and Contacts clients to enable unit testing through mock implementations. - GmailClientInterface: GetMessage, SearchMessages, GetThread, FetchLabels, GetLabelName, GetLabels, GetAttachments, DownloadAttachment, DownloadInlineAttachment - CalendarClientInterface: ListCalendars, ListEvents, GetEvent - ContactsClientInterface: ListContacts, SearchContacts, GetContact, ListContactGroups Each interface includes compile-time verification that the concrete Client type implements it. Closes #35
This was referenced Jan 25, 2026
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Summary
Adds interface definitions for Gmail, Calendar, and Contacts clients to enable unit testing through mock implementations.
Interfaces defined:
GmailClientInterface: GetMessage, SearchMessages, GetThread, FetchLabels, GetLabelName, GetLabels, GetAttachments, DownloadAttachment, DownloadInlineAttachmentCalendarClientInterface: ListCalendars, ListEvents, GetEventContactsClientInterface: ListContacts, SearchContacts, GetContact, ListContactGroupsEach interface includes compile-time verification that the concrete
Clienttype implements it viavar _ Interface = (*Client)(nil).Test plan
make test)make lint)Closes #35