Some servers (e.g. Dovecot) use placeholder strings instead of the empty
string (e.g. "MISSING_DOMAIN") in FETCH Envelope responses when a
required address part (e.g. local part, domain) are empty.
This adds a quirk that can be enabled for such servers to check for the
placeholders and if found, replace them with empty strings.
Add a quirks object as a property so code that parses the response has
access to it. Simplify constructing server responses slightly and pass
the IMAP connection's quirks when doing so.
If an address does not have an `@`, or if the IMAP constructor is called
with empty mailbox or domain parts, then these properties will be empty.
This is not uncommon, especially on UNIX hosts where system accounts
send email.
Ensure this is handled correctly in the constructors and are
round-tripped correctly by `to_rfc822_address` and hence
`to_rfc822_string`.
Commit 37d904b5 added a partial change to how drafts are saved and
loaded - saving plain text only when not in rich text mode and
loading HTML-based drafts that don't seem to have originated from Geary
and plain-text-only drafts as the body so that Geary's composer-internal
HTML markup is still present.
However this introduced a double signature when loading plain text
drafts back since Geary would assume the body (including sig) is the
message body and appending a new sig to that.
This addresses the issue above by always saving drafts with HTML parts
even when in plain text only mode.
Ensure composer state is restored when loading draft replies and that
`referred_ids` is updated top include the messages the draft refers to.
Make the process for loading different context types more obvious by
doing the work in-place, especially for replies, and avoiding multiple
utility methods that also branch based on type.
Use standard RFC822 classes for managing In-Reply-To and References, and
merge id lists rather than simply concatenating them. Ensure both are
updated when adding additional replies to the email, and they are always
set on any composed email constructed.
Add unit tests for all of the above.
Defining an interface for the composer to access application objects
and services decouples it from Application.Controller, allowing it to be more
easily unit tested.
Replace use of Application.Client and Application.Controller in the
composer and add some basic unit tests.
Although when processing mailbox addresses lists are effectively sets,
the ordering can be important for people. As such, make `equal_to`
comparisons require identical ordering, and add new `contains_all` for
order-independent comparisons.
By defining an interface for account object access, classes that use it
are decoupled from Application.Controller, allowing them to be more
easily unit tested.
Engine mocks don't need to be in the `Geary` namespace, and including
them there makes it difficult to use them in client tests, so put them
all in their own name-space and corresponding directory.
