User-to-user direct email contact
=================================

A Launchpad user can contact another Launchpad user directly, even if
the recipient is hiding their email addresses.

    >>> def create_view(sender, recipient, form=None):
    ...     return create_initialized_view(
    ...         recipient, '+contactuser',
    ...         form=form, principal=sender)

    >>> def print_notifications(view):
    ...     for notification in view.request.notifications:
    ...         print notification.message

For example, let's say No Privileges Person wants to contact Salgado...

    >>> from zope.component import getUtility
    >>> from lp.registry.interfaces.person import IPersonSet
    >>> person_set = getUtility(IPersonSet)
    >>> no_priv = person_set.getByName('no-priv')
    >>> salgado = person_set.getByName('salgado')

...No Priv would start by going to Salgado's +contactuser page.

    >>> from canonical.launchpad.ftests import login
    >>> login_person(no_priv)
    >>> view = create_view(no_priv, salgado)

This contact is allowed.

    >>> print view.label
    Contact user

    >>> view.contact_is_allowed
    True

No Priv changes her mind though.

    >>> print view.cancel_url
    http://launchpad.dev/~salgado

No Priv decides, what the heck, let's contact Salgado after all.

    >>> view = create_view(
    ...     no_priv, salgado, {
    ...     'field.field.from_': 'no-priv@canonical.com',
    ...     'field.subject': 'Hello Salgado',
    ...     'field.message': 'Can you tell me about your project?',
    ...     'field.actions.send': 'Send',
    ...     })
    >>> print_notifications(view)
    Message sent to Guilherme Salgado

    # Capture the date of the last contact for later.

    >>> from canonical.config import config
    >>> from lp.services.messages.model.message import UserToUserEmail
    >>> from lazr.config import as_timedelta
    >>> from storm.locals import Store
    >>> first_contact = Store.of(no_priv).find(
    ...     UserToUserEmail,
    ...     UserToUserEmail.sender == no_priv).one()
    >>> expires = first_contact.date_sent + as_timedelta(
    ...     config.launchpad.user_to_user_throttle_interval)

No Priv sends two more messages to Salgado.  Each of these are allowed
too.

    >>> view = create_view(
    ...     no_priv, salgado, {
    ...     'field.field.from_': 'no-priv@canonical.com',
    ...     'field.subject': 'Hello Salgado',
    ...     'field.message': 'Can you tell me about your project?',
    ...     'field.actions.send': 'Send',
    ...     })
    >>> print_notifications(view)
    Message sent to Guilherme Salgado

    >>> view = create_view(
    ...     no_priv, salgado, {
    ...     'field.field.from_': 'no-priv@canonical.com',
    ...     'field.subject': 'Hello Salgado',
    ...     'field.message': 'Can you tell me about your project?',
    ...     'field.actions.send': 'Send',
    ...     })
    >>> print_notifications(view)
    Message sent to Guilherme Salgado

Now however, No Priv had reached her quota for direct user-to-user
contact and is not allowed to send a fourth message today.

    >>> view = create_view(no_priv, salgado)
    >>> view.contact_is_allowed
    False

No Priv can try again later.

    >>> view.next_try == expires
    True

As a corner case, let's say the number of notifications allowed was
greater yesterday than it was today.

    >>> config.push('seven_allowed', """\
    ...    [launchpad]
    ...    user_to_user_max_messages: 7
    ...    """)

No Priv can actually try again right now.

    >>> from datetime import datetime
    >>> import pytz
    >>> view.next_try <= datetime.now(pytz.timezone('UTC'))
    True

So, No Priv sends four more emails.

    >>> for i in range(4):
    ...     assert create_view(no_priv, salgado).contact_is_allowed, (
    ...         'Contact was not allowed? %s' % i)
    ...     view = create_view(
    ...         no_priv, salgado, {
    ...         'field.field.from_': 'no-priv@canonical.com',
    ...         'field.subject': 'Hello Salgado',
    ...         'field.message': 'Can you tell me about your project?',
    ...         'field.actions.send': 'Send',
    ...         })
    ...     print_notifications(view)
    Message sent to Guilherme Salgado
    Message sent to Guilherme Salgado
    Message sent to Guilherme Salgado
    Message sent to Guilherme Salgado

No Priv has once again reached her limit of emails.

    >>> view = create_view(no_priv, salgado)
    >>> view.contact_is_allowed
    False

    >>> view.next_try == expires
    True

The configuration changes back to allow only three emails.

    >>> config.pop('seven_allowed')
    (...)

    >>> contacts = Store.of(no_priv).find(
    ...     UserToUserEmail,
    ...     UserToUserEmail.sender == no_priv)
    >>> contact = list(contacts)[4]
    >>> expires = contact.date_sent + as_timedelta(
    ...     config.launchpad.user_to_user_throttle_interval)


Non-ASCII names
---------------

Carlos has non-ASCII characters in his name.  When he sends a message to
a user, his real name will be properly RFC 2047 encoded.

    >>> transaction.abort()
    >>> from lp.services.mail import stub
    >>> del stub.test_emails[:]
    >>> len(stub.test_emails)
    0

    >>> carlos = person_set.getByName('carlos')
    >>> login('carlos@canonical.com')
    >>> view = create_view(
    ...     carlos, no_priv, {
    ...     'field.field.from_': 'carlos@canonical.com',
    ...     'field.subject': 'Hello No Priv',
    ...     'field.message': 'I see funny characters',
    ...     'field.actions.send': 'Send',
    ...     })
    >>> transaction.commit()

    >>> len(stub.test_emails)
    1

    >>> from_addr, to_addrs, raw_msg = stub.test_emails.pop()
    >>> print raw_msg
    Content-Type: text/plain; charset="us-ascii"
    ...
    From: =?utf-8?q?Carlos_Perell=C3=B3_Mar=C3=ADn?= <carlos@canonical.com>
    To: No Privileges Person <no-priv@canonical.com>
    ...

Similarly, if Carlos is the recipient of a message, his real name will
be properly RFC 2047 encoded as well.

    >>> del stub.test_emails[:]

    >>> login('no-priv@canonical.com')
    >>> view = create_view(
    ...     no_priv, carlos, {
    ...     'field.field.from_': 'no-priv@canonical.com',
    ...     'field.subject': 'Hello Carlos',
    ...     'field.message': 'I see funny characters',
    ...     'field.actions.send': 'Send',
    ...     })
    >>> transaction.commit()

    >>> len(stub.test_emails)
    1

    >>> from_addr, to_addrs, raw_msg = stub.test_emails.pop()
    >>> print raw_msg
    Content-Type: text/plain; charset="us-ascii"
    ...
    From: No Privileges Person <no-priv@canonical.com>
    To: =?utf-8?q?Carlos_Perell=C3=B3_Mar=C3=ADn?= <carlos@canonical.com>
    ...


Hidden addresses
----------------

Salgado decides to hide his email addresses.

    >>> login_person(salgado)
    >>> salgado.hide_email_addresses = True

Anne contacts Salgado even though his email addresses are hidden.

    >>> anne = factory.makePerson(email='anne@example.com', name='anne')
    >>> logout()
    >>> login_person(anne)

    >>> view = create_view(
    ...     anne, salgado, {
    ...         'field.field.from_': 'anne@example.com',
    ...         'field.subject': 'Hello Salgado',
    ...         'field.message': 'It is nice to meet you',
    ...         'field.actions.send': 'Send',
    ...         })
    >>> print_notifications(view)
    Message sent to Guilherme Salgado


Contacting teams
----------------

Teams can also be contacted directly, regardless of whether they have no
official contact address, use a Launchpad mailing list, or have the
contact address set to an explicit address.

    # Clear out left over crud.

    >>> transaction.commit()
    >>> del stub.test_emails[:]

    >>> from email import message_from_string
    >>> def print_messages():
    ...     message_count = 0
    ...     message_subjects = set()
    ...     message_senders = set()
    ...     message_recipients = set()
    ...     message_bodies = set()
    ...     while stub.test_emails:
    ...         from_addr, to_addrs, raw_msg = stub.test_emails.pop()
    ...         message = message_from_string(raw_msg)
    ...         message_count += 1
    ...         message_subjects.add(message['subject'])
    ...         message_senders.add(message['from'])
    ...         message_recipients.add(message['to'])
    ...         message_bodies.add(message.get_payload())
    ...     print 'Senders:', message_senders
    ...     print 'Subjects:', message_subjects
    ...     print 'Bodies:'
    ...     for body in sorted(message_bodies):
    ...         print body
    ...     print '# of Messages:', message_count
    ...     print 'Recipients:'
    ...     for recipient in sorted(message_recipients):
    ...         print '   ', recipient


Non-member to team
..................

Non-members may only contact the team owner.

    >>> guadamen = person_set.getByName('guadamen')
    >>> bart = factory.makePerson(email='bart@example.com', name='bart')
    >>> login_person(bart)

    >>> view = create_view(
    ...     bart, guadamen, {
    ...         'field.field.from_': 'bart@example.com',
    ...         'field.subject': 'Hello Guadamen',
    ...         'field.message': 'Can one of you help me?',
    ...         'field.actions.send': 'Send',
    ...         })
    >>> print_notifications(view)
    Message sent to GuadaMen

    >>> transaction.commit()
    >>> print_messages()
    Senders: set(['Bart <bart@example.com>'])
    Subjects: set(['Hello Guadamen'])
    Bodies:
    Can one of you help me?
    --
    This message was sent from Launchpad by
    Bart (http://launchpad.dev/~bart)
    using the "Contact this team's owner" link on the GuadaMen team page
    (http://launchpad.dev/~guadamen).
    For more information see
    https://help.launchpad.net/YourAccount/ContactingPeople
    # of Messages: 1
    Recipients:
        Foo Bar <foo.bar@canonical.com>


Member to team
..............

Foo Bar is a member of Guadamen team, he is not restricted to contacting
the team owner. The Guadamen team has no contact address, so contacting
them contacts all its members directly.

    >>> login('foo.bar@canonical.com')
    >>> foo_bar = person_set.getByName('name16')
    >>> view = create_view(
    ...     foo_bar, guadamen, {
    ...         'field.field.from_': 'foo.bar@canonical.com',
    ...         'field.subject': 'Hello Guadamen',
    ...         'field.message': 'Can one of you help me?',
    ...         'field.actions.send': 'Send',
    ...         })
    >>> print_notifications(view)
    Message sent to GuadaMen

There are 10 members of the team, so exactly 10 unique copies of the
message are sent, one to each team member. Everyone gets a message with
the same subject and body from the same sender.

    >>> transaction.commit()
    >>> print_messages()
    Senders: set(['Foo Bar <foo.bar@canonical.com>'])
    Subjects: set(['Hello Guadamen'])
    Bodies:
    Can one of you help me?
    --
    This message was sent from Launchpad by
    Foo Bar (http://launchpad.dev/~name16)
    to each member of the GuadaMen team using the "Contact this team" link on
    the GuadaMen team page (http://launchpad.dev/~guadamen).
    For more information see
    https://help.launchpad.net/YourAccount/ContactingPeople
    # of Messages: 10
    Recipients:
        Alexander Limi <limi@plone.org>
        Celso Providelo <celso.providelo@canonical.com>
        Colin Watson <colin.watson@ubuntulinux.com>
        Daniel Silverstone <daniel.silverstone@canonical.com>
        Edgar Bursic <edgar@monteparadiso.hr>
        Foo Bar <foo.bar@canonical.com>
        Jeff Waugh <jeff.waugh@ubuntulinux.com>
        Mark Shuttleworth <mark@example.com>
        Steve Alexander <steve.alexander@ubuntulinux.com>
        Ubuntu Team <support@ubuntu.com>

The Guadamen team creates a mailing list but does not set it to be the
contact address. The mailing list will not be used.

    >>> team, mailing_list = factory.makeTeamAndMailingList(
    ...     guadamen.name, guadamen.teamowner.name)

    # Ignore the 'new mailing list message'

    >>> transaction.commit()
    >>> del stub.test_emails[:]

Foo Bar now contacts them again, which he can do because his quota is
still not met. This message includes a "%s" combination; it is not a
interpolation instruction.

    >>> view = create_view(
    ...     foo_bar, guadamen, {
    ...         'field.field.from_': 'foo.bar@canonical.com',
    ...         'field.subject': 'My last question for Guadamen',
    ...         'field.message': 'Can one of you help me with "%s" usage!',
    ...         'field.actions.send': 'Send',
    ...         })
    >>> print_notifications(view)
    Message sent to GuadaMen

Foo Bar's message gets sent to each individual member of he team.

    >>> transaction.commit()
    >>> print_messages()
    Senders: set(['Foo Bar <foo.bar@canonical.com>'])
    Subjects: set(['My last question for Guadamen'])
    Bodies:
    Can one of you help me with "%s" usage!
    --
    This message was sent from Launchpad by
    Foo Bar (http://launchpad.dev/~name16)
    to each member of the GuadaMen team
    using the "Contact this team" link on the GuadaMen
    team page (http://launchpad.dev/~guadamen).
    For more information see
    https://help.launchpad.net/YourAccount/ContactingPeople
    # of Messages: 10
    Recipients:
        Alexander Limi <limi@plone.org>
        Celso Providelo <celso.providelo@canonical.com>
        Colin Watson <colin.watson@ubuntulinux.com>
        Daniel Silverstone <daniel.silverstone@canonical.com>
        Edgar Bursic <edgar@monteparadiso.hr>
        Foo Bar <foo.bar@canonical.com>
        Jeff Waugh <jeff.waugh@ubuntulinux.com>
        Mark Shuttleworth <mark@example.com>
        Steve Alexander <steve.alexander@ubuntulinux.com>
        Ubuntu Team <support@ubuntu.com>

The Guadamen team now registers an external contact address (they could
have also used their Launchpad mailing list address).

    >>> from canonical.launchpad.interfaces.emailaddress import (
    ...     IEmailAddressSet)
    >>> email_set = getUtility(IEmailAddressSet)
    >>> address = email_set.new('guadamen@example.com', guadamen)
    >>> guadamen.setContactAddress(address)

Foo Bar contacts the Guadamen team again, which is allowed because his
quota was not met by his first message.  This time only one message is
sent, and that to the new contact address.

    >>> view = create_view(
    ...     foo_bar, guadamen, {
    ...         'field.field.from_': 'foo.bar@canonical.com',
    ...         'field.subject': 'Hello again Guadamen',
    ...         'field.message': 'Can one of you help me?',
    ...         'field.actions.send': 'Send',
    ...         })
    >>> print_notifications(view)
    Message sent to GuadaMen

    >>> transaction.commit()
    >>> len(stub.test_emails)
    1

    >>> from_addr, to_addrs, raw_msg = stub.test_emails.pop()
    >>> print from_addr, to_addrs
    bounces@canonical.com [u'GuadaMen <guadamen@example.com>']

    >>> print raw_msg
    Content-Type: text/plain; charset="us-ascii"
    ...
    From: Foo Bar <foo.bar@canonical.com>
    To: GuadaMen <guadamen@example.com>
    Subject: Hello again Guadamen
    ...
    X-Launchpad-Message-Rationale: ContactViaWeb member (guadamen team)
    ...
    <BLANKLINE>
    Can one of you help me?
    --
    This message was sent from Launchpad by
    Foo Bar (http://launchpad.dev/~name16)
    using the "Contact this team" link on the GuadaMen team page
    (http://launchpad.dev/~guadamen).
    For more information see
    https://help.launchpad.net/YourAccount/ContactingPeople


Message quota
-------------

The EmailToPersonView provides two properties that check that the user
is_allowed to send emails because he has not exceeded the daily quota.
The next_try property is the date when the user will be allowed to send
emails again. The is_possible property will be False if is_allowed is
False.

Foo Bar has now reached his quota and can send no more contact messages
today.

    >>> view = create_view(
    ...     foo_bar, guadamen, {
    ...         'field.field.from_': 'foo.bar@canonical.com',
    ...         'field.subject': 'My last question for Guadamen',
    ...         'field.message': 'Really, can one of you help me!',
    ...         'field.actions.send': 'Send',
    ...         })
    >>> view.contact_is_allowed
    False

    >>> view.next_try
    datetime.datetime...

    >>> view.contact_is_possible
    False

    >>> print_notifications(view)
    Your message was not sent because you have exceeded your daily quota of
    3 messages to contact users. Try again in ...

Bart has sent 1 message, he may send more messages.

    >>> login_person(bart)
    >>> view = create_view(bart, guadamen)
    >>> view.contact_is_allowed
    True

    >>> view.contact_is_possible
    True


Identifying information
-----------------------

Every contact message has a special Launchpad header so that people can
tell that the message came to them through Launchpad. It has a footer
that contains an explanation as well.

    >>> cris = factory.makePerson(email='cris@example.com', name='cris')
    >>> dave = factory.makePerson(email='dave@example.com', name='dave')
    >>> login_person(cris)

    >>> view = create_view(
    ...     cris, dave, {
    ...         'field.field.from_': 'cris@example.com',
    ...         'field.subject': 'Hi Dave',
    ...         'field.message': 'Can you help me?' ,
    ...         'field.actions.send': 'Send',
    ...         })
    >>> transaction.commit()
    >>> from_addr, to_addrs, raw_msg = stub.test_emails.pop()
    >>> print raw_msg
    Content-Type: text/plain; charset="us-ascii"
    ...
    From: Cris <cris@example.com>
    To: Dave <dave@example.com>
    Subject: Hi Dave
    ...
    X-Launchpad-Message-Rationale: ContactViaWeb user
    ...
    <BLANKLINE>
    Can you help me?
    --
    This message was sent from Launchpad by
    Cris (http://launchpad.dev/~cris)
    using the "Contact this user" link on your profile page
    (http://launchpad.dev/~dave).
    For more information see
    https://help.launchpad.net/YourAccount/ContactingPeople


Message wrapping
----------------

The message body is wrapped at 72 characters. The footer is not wrapped,
but a new line is started after the names of the sender and the recient
to minimise long lines.

    >>> login('test@canonical.com')
    >>> sample_person = person_set.getByEmail('test@canonical.com')
    >>> landscape_developers = person_set.getByName('landscape-developers')
    >>> view = create_view(
    ...     sample_person, landscape_developers, {
    ...         'field.field.from_': 'test@canonical.com',
    ...         'field.subject': 'Wrapping test ',
    ...         'field.message': 'Can you help me? ' * 8,
    ...         'field.actions.send': 'Send',
    ...         })
    >>> transaction.commit()
    >>> from_addr, to_addrs, raw_msg = stub.test_emails.pop()
    >>> header, body =  raw_msg.split('\n\n')
    >>> for line in body.split('\n'):
    ...     print "^%s$" % line
    ^Can you help me? Can you help me? Can you help me? Can you help me? Can$
    ^you help me? Can you help me? Can you help me? Can you help me?$
    ^-- $
    ^This message was sent from Launchpad by$
    ^Sample Person (http://launchpad.dev/~name12)$
    ^to each member of the Landscape Developers team using the "Contact this$
    ^team" link on the Landscape Developers team page$
    ^(http://launchpad.dev/~landscape-developers).$
    ^For more information see$
    ^https://help.launchpad.net/YourAccount/ContactingPeople$