Add tool for updating a contact

[mattt]

(Sorry to inform you that you're no longer a Pisces in my book, @carlpeaslee 🐟)

[Copilot]

Pull Request Overview

This PR adds a new tool for updating a contact, allowing selective modification of contact properties.

• Introduces a new "contacts_update" tool with a comprehensive input schema.
• Implements updates for various contact fields such as name, phone numbers, email addresses, postal addresses, and birthday.

[Copilot]

Consider using a custom Swift Error type instead of NSError for a more idiomatic error handling approach in Swift.

Suggested change

	throw NSError(
	domain: "ContactsService", code: 1,
	userInfo: [NSLocalizedDescriptionKey: "Valid contact identifier required"]
	)
	throw ContactsServiceError.invalidIdentifier

[mattt]

Heh, valid

[Copilot]

[nitpick] Consider extracting the mapping logic for updating phone numbers, as well as the similar sections for email addresses and postal addresses, into helper functions to reduce repetition and improve maintainability.

Suggested change

	mutableContact.phoneNumbers = phoneNumbers.compactMap { entry in
	guard case let .string(value) = entry.value
	else {
	return nil
	}
	let labelValue =
	entry.key == "mobile"
	? CNLabelPhoneNumberMobile
	: entry.key == "work"
	? CNLabelWork : entry.key == "home" ? CNLabelHome : entry.key
	return CNLabeledValue(
	label: labelValue,
	value: CNPhoneNumber(stringValue: value)
	)
	}
	mutableContact.phoneNumbers = mapToLabeledValues(
	input: phoneNumbers,
	labelMapping: [
	"mobile": CNLabelPhoneNumberMobile,
	"work": CNLabelWork,
	"home": CNLabelHome
	],
	valueTransformer: { CNPhoneNumber(stringValue: $0) }
	)

[mattt]

Good call. Maybe another time.