In order to limit issues with duplicate inline CSS definitions, this will now deduplicate inline CSS styles with the "last-to-be-defined-wins" strategy.
Also removes unecessary whitespaces in inline styles.
Context - https://meta.discourse.org/t/resolve-final-styles-in-email-notifications/310219
Co-authored-by: Thomas Kalka <thomas.kalka@gmail.com>
This fix handles the case where an In-Reply-To mail header
can contain multiple Message-IDs. We use this header to
try look up an EmailLog record to find the post to reply
to in the group email inbox flow.
Since the case where multiple In-Reply-To Message-IDs is
rare (we've only seen a couple of instances of this causing
errors in the wild), we are just going to use the first one
in the array.
Also, Discourse does not support replying to multiple posts
at once, so it doesn't really make sense to use multiple
In-Reply-To Message-IDs anyway.
Constants should always be only assigned once. The logical OR assignment
of a constant is a relic of the past before we used zeitwerk for
autoloading and had bugs where a file could be loaded twice resulting in
constant redefinition warnings.
This change how we present attachments from incoming emails to now be "hidden" in a "[details]" so they don't "hang" at the end of the post.
This is especially useful when using Discourse as a support tool where email is the main communication channel. For various reasons, images are often duplicated by email user agents, and hiding them behind the details block help keep the conversation focused on the isssue at hand.
Internal ref t/122333
This change eliminates a couple of instances where subfolder urls are badly formatted, in most cases we can use Discourse.base_url_no_prefix to prevent adding the subfolder to the base url.
Followup 96a0781bc1
When sending emails where secure uploads is enabled
and secure_uploads_allow_embed_images_in_emails is
true, we attach the images to the email, and we
do some munging with the final email so the structure
of the MIME parts looks like this:
```
multipart/mixed
multipart/alternative
text/plain
text/html
image/jpeg
image/jpeg
image/png
```
However, we were not specifying the `boundary` of the
`multipart/mixed` main content-type of the email, so
sometimes the email would come through appearing to
have an empty body with the entire thing attached as
one attachment, and some mail parsers considered the
entire email as the "epilogue" and/or "preamble".
This commit fixes the issue by specifying the boundary
in the content-type header per https://www.w3.org/Protocols/rfc1341/7_2_Multipart.html
We recently fixed a problem where secure upload images weren't re-attached when sending the activity summary e-mail.
This fix contained a bug that would lead to n copies of the e-mail body being included, n being the number of duplicates. This is because #fix_parts_after_attachments! was called once per attachment, and adding more parts to the multipart e-mail.
This PR fixes that by:
Adding a failing test case for the above.
Moving the looping over multiple posts into #fix_parts_after_attachments! itself.
In #26642 we introduced a change that re-attaches securely uploaded images in the digest e-mail. However, this change assumed that the type argument to the Email::Sender constructor would be a symbol, but when it is coming from the UserEmail job it is a string. This PR fixes that.
Introduced back in 2022 in
e3d495850d,
our new more specific message-id format for inbound and
outbound emails has now been in use for a very long time,
we can remove the support for the old formats:
`topic/:topic_id/:post_id.:random@:host`
`topic/:topic_id@:host`
`topic/:topic_id.:random@:host`
* DEV: allow reply_by_email, visit_link_to_respond strings to be modified by plugins
* DEV: separate visit_link_to_respond and reply_by_email modifiers out
This is a follow up of 5fcb7c262d
It was missing the case where secure uploads is enabled, which creates a copy of the upload no matter what.
So this checks for the original_sha1 of the uploads as well when checking for duplicates.
For e-mails, secure uploads redacts all secure images, and later uses the access control post to re-attached allowed ones. We pass the ID of this post through the X-Discourse-Post-Id header. As the name suggests, this assumes there's only ever one access control post. This is not true for activity summary e-mails, as they summarize across posts.
This adds a new header, X-Discourse-Post-Ids, which is used the same way as the old header, but also works for the case where an e-mail is associated with multiple posts.
## What?
Depending on the email software used, when you reply to an email that has some attachments, they will be sent along, since they're part of the embedded (replied to) email.
When Discourse processes the reply as an incoming email, it will automatically add all the (valid) attachments at the end of the post. Including those that were sent as part of the "embedded reply".
This generates posts in Discourse with duplicate attachments 🙁
## How?
When processing attachments of an incoming email, before we add it to the bottom of the post, we check it against all the previous uploads in the same topic. If there already is an `Upload` record, it means that it's a duplicate and it is _therefore_ skipped.
All the inline attachments are left untouched since they're more likely new attachments added by the sender.
This change refactors the check `user.groups.any?` and instead uses
`user.staged?` to check if the user is staged or not.
Also fixes several tests to ensure the users have their auto trust level
groups created.
Follow up to:
- 8a45f84277
- 447d9b2105
- c89edd9e86
This change converts the `email_in_min_trust` site setting to
`email_in_allowed_groups`.
See: https://meta.discourse.org/t/283408
- Hides the old setting
- Adds the new site setting
- Add a deprecation warning
- Updates to use the new setting
- Adds a migration to fill in the new setting if the old setting was
changed
- Adds an entry to the site_setting.keywords section
- Updates tests to account for the new change
After a couple of months we will remove the
`email_in_min_trust` setting entirely.
Internal ref: /t/115696
There are cases where a user can copy image markdown from a public
post (such as via the discourse-templates plugin) into a PM which
is then sent via an email. Since a PM is a secure context (via the
.with_secure_uploads? check on Post), the image will get a secure
URL in the PM post even though the backing upload is not secure.
This fixes the bug in that case where the image would be stripped
from the email (since it had a /secure-uploads/ URL) but not re-attached
further down the line using the secure_uploads_allow_embed_images_in_emails
setting because the upload itself was not secure.
The flow in Email::Sender for doing this is still not ideal, but
there are chicken and egg problems around when to strip the images,
how to fit in with other attachments and email size limits, and
when to apply the images inline via Email::Styles. It's convoluted,
but at least this fixes the Template use case for now.
While we are unable to support OAUTH2 with pop3 (due to upstream dependency ruby/net-pop#16), we are adding the support for mail pollers plugin. Doing so, it would be possible to write a plugin which then uses other ways (microsoft graph sdk for example) to poll emails from a mailbox.
The idea is that a plugin would define a class which inherits from Email::Poller and defines a poll_mailbox static method which returns an array of strings. Then the plugin could call register_mail_poller(<class_name>) to have it registered. All the configuration (oauth2 tokens, email, etc) could be managed by sitesettings defined in the plugin.
https://meta.discourse.org/t/improving-mailman-email-parsing/253041
When mirroring a public mailling list which uses mailman, there were some cases where the incoming email was not associated to the proper user.
As it happens, for various (undertermined) reasons, the email from the sender is often not in the `From` header but can be in any of the following headers: `Reply-To`, `CC`, `X-Original-From`, `X-MailFrom`.
It might be in other headers as well, but those were the ones we found the most reliable.
Currently processing emails that are blank or have a nil value for the mail will cause several errors.
This update allows emails with blank body or missing sender to log the blank email error to the mail logs rather than throwing an error.
In #21498, we split `BaseStore#download` into a "safe" version which returns nil on errors, and an "unsafe" version which raises an exception, which was the old behaviour of `#download`.
This change updates call sites that used the old `#download`, which raised exceptions, to use the new `#download!` to preserve behaviour (and silence deprecation warnings.)
It also silences the deprecation warning in tests.
This header is used by Microsoft Exchange to indicate when certain types of
autoresponses should not be generated for an email.
It triggers our "is this mail autogenerated?" detection, but should not be used
for this purpose.
The #pluck_first freedom patch, first introduced by @danielwaterworth has served us well, and is used widely throughout both core and plugins. It seems to have been a common enough use case that Rails 6 introduced it's own method #pick with the exact same implementation. This allows us to retire the freedom patch and switch over to the built-in ActiveRecord method.
There is no replacement for #pluck_first!, but a quick search shows we are using this in a very limited capacity, and in some cases incorrectly (by assuming a nil return rather than an exception), which can quite easily be replaced with #pick plus some extra handling.
There was an issue where if hashtag-cooked HTML was sent
to the ExcerptParser without the keep_svg option, we would
end up with empty </use> and </svg> tags on the parts of the
excerpt where the hashtag was, in this case when a post
push notification was sent.
Fixed this, and also added a way to only display a plaintext
version of the hashtag for cases like this via PrettyText#excerpt.
This commit does a couple of things:
1. Changes the limit of tags to include a subject for a
notification email to the `max_tags_per_topic` setting
instead of the arbitrary 3 limit
2. Adds both an X-Discourse-Tags and X-Discourse-Category
custom header to outbound emails containing the tags
and category from the subject, so people on mail clients
that allow advanced filtering (i.e. not Gmail) can filter
mail by tags and category, which is useful for mailing
list mode users
c.f. https://meta.discourse.org/t/headers-for-email-notifications-so-that-gmail-users-can-filter-on-tags/249982/17
When sending emails out via group SMTP, if we
are sending them to non-staged users we want
to mask those emails with BCC, just so we don't
expose them to anyone we shouldn't. Staged users
are ones that have likely only interacted with
support via email, and will likely include other
people who were CC'd on the original email to the
group.
Co-authored-by: Martin Brennan <martin@discourse.org>
* DEV: Remove enable_whispers site setting
Whispers are enabled as long as there is at least one group allowed to
whisper, see whispers_allowed_groups site setting.
* DEV: Always enable whispers for admins if at least one group is allowed.
In some cases (e.g. user notification emails) we
are passing an excerpted/stripped version of the
post HTML to Email::Styles, at which point the
<span> elements surrounding the hashtag text have
been stripped. This caused an error when trying to
remove that element to replace the text.
Instead we can just remove all elements inside
a.hashtag-cooked and replace with the raw #hashtag
text which will work in more cases.
This commit fleshes out and adds functionality for the new `#hashtag` search and
lookup system, still hidden behind the `enable_experimental_hashtag_autocomplete`
feature flag.
**Serverside**
We have two plugin API registration methods that are used to define data sources
(`register_hashtag_data_source`) and hashtag result type priorities depending on
the context (`register_hashtag_type_in_context`). Reading the comments in plugin.rb
should make it clear what these are doing. Reading the `HashtagAutocompleteService`
in full will likely help a lot as well.
Each data source is responsible for providing its own **lookup** and **search**
method that returns hashtag results based on the arguments provided. For example,
the category hashtag data source has to take into account parent categories and
how they relate, and each data source has to define their own icon to use for the
hashtag, and so on.
The `Site` serializer has two new attributes that source data from `HashtagAutocompleteService`.
There is `hashtag_icons` that is just a simple array of all the different icons that
can be used for allowlisting in our markdown pipeline, and there is `hashtag_context_configurations`
that is used to store the type priority orders for each registered context.
When sending emails, we cannot render the SVG icons for hashtags, so
we need to change the HTML hashtags to the normal `#hashtag` text.
**Markdown**
The `hashtag-autocomplete.js` file is where I have added the new `hashtag-autocomplete`
markdown rule, and like all of our rules this is used to cook the raw text on both the clientside
and on the serverside using MiniRacer. Only on the server side do we actually reach out to
the database with the `hashtagLookup` function, on the clientside we just render a plainer
version of the hashtag HTML. Only in the composer preview do we do further lookups based
on this.
This rule is the first one (that I can find) that uses the `currentUser` based on a passed
in `user_id` for guardian checks in markdown rendering code. This is the `last_editor_id`
for both the post and chat message. In some cases we need to cook without a user present,
so the `Discourse.system_user` is used in this case.
**Chat Channels**
This also contains the changes required for chat so that chat channels can be used
as a data source for hashtag searches and lookups. This data source will only be
used when `enable_experimental_hashtag_autocomplete` is `true`, so we don't have
to worry about channel results suddenly turning up.
------
**Known Rough Edges**
- Onebox excerpts will not render the icon svg/use tags, I plan to address that in a follow up PR
- Selecting a hashtag + pressing the Quote button will result in weird behaviour, I plan to address that in a follow up PR
- Mixed hashtag contexts for hashtags without a type suffix will not work correctly, e.g. #ux which is both a category and a channel slug will resolve to a category when used inside a post or within a [chat] transcript in that post. Users can get around this manually by adding the correct suffix, for example ::channel. We may get to this at some point in future
- Icons will not show for the hashtags in emails since SVG support is so terrible in email (this is not likely to be resolved, but still noting for posterity)
- Additional refinements and review fixes wil
This commit renames all secure_media related settings to secure_uploads_* along with the associated functionality.
This is being done because "media" does not really cover it, we aren't just doing this for images and videos etc. but for all uploads in the site.
Additionally, in future we want to secure more types of uploads, and enable a kind of "mixed mode" where some uploads are secure and some are not, so keeping media in the name is just confusing.
This also keeps compatibility with the `secure-media-uploads` path, and changes new
secure URLs to be `secure-uploads`.
Deprecated settings:
* secure_media -> secure_uploads
* secure_media_allow_embed_images_in_emails -> secure_uploads_allow_embed_images_in_emails
* secure_media_max_email_embed_image_size_kb -> secure_uploads_max_email_embed_image_size_kb
See https://meta.discourse.org/t/discourse-email-messages-are-incorrectly-threaded/233499
for thorough reasoning.
This commit changes how we generate Message-IDs and do email
threading for emails sent from Discourse. The main changes are
as follows:
* Introduce an outbound_message_id column on Post that
is either a) filled with a Discourse-generated Message-ID
the first time that post is used for an outbound email
or b) filled with an original Message-ID from an external
mail client or service if the post was created from an
incoming email.
* Change Discourse-generated Message-IDs to be more consistent
and static, in the format `discourse/post/:post_id@:host`
* Do not send References or In-Reply-To headers for emails sent
for the OP of topics.
* Make sure that In-Reply-To is filled with either a) the OP's
Message-ID if the post is not a direct reply or b) the parent
post's Message-ID
* Make sure that In-Reply-To has all referenced post's Message-IDs
* Make sure that References is filled with a chain of Message-IDs
from the OP down to the parent post of the new post.
We also are keeping X-Discourse-Post-Id and X-Discourse-Topic-Id,
headers that we previously removed, for easier visual debugging
of outbound emails.
Finally, we backfill the `outbound_message_id` for posts that have
a linked `IncomingEmail` record, using the `message_id` of that record.
We do not need to do that for posts that don't have an incoming email
since they are backfilled at runtime if `outbound_message_id` is missing.
The maximum_staged_users_per_email site setting controls how many
staged users will be invited to the topic created from an incoming
email. Previously, it counted only the new staged users.
When sending emails with delivery_method_options -> return_response
set to true, the SMTP sending code inside Mail will return the SMTP
response when calling deliver! for mail within the app. This commit
ensures that Email::Sender captures this response if it is returned
and stores it against the EmailLog created for the sent email.
A follow up PR will make this visible within the admin email UI.
When we build and send emails using MessageBuilder and Email::Sender
we add custom headers defined in SiteSetting.email_custom_headers.
However this was causing errors in cases where the custom headers
defined a header that we already specify in outbound emails (e.g.
the Precedence: list header for topic/post emails).
This commit makes it so we always use the header value defined in Discourse
core if there is a duplicate, discarding the custom header value
from the site setting.
cf. https://meta.discourse.org/t/email-notifications-fail-if-duplicate-headers-exist/222960/14
Mozilla Thunderbird email client add links into HTML as follows:
`<p>The link: <a class="moz-txt-link-freetext" href="https://google.com">https://google.com</a></p>`
Current filtering rules strip out the link, leaving only `<p>The link: </p>`.
Properly strip only unnecessary information: quote prefix, signature, forwarded message header.
This PR enables custom email dark mode styles by default that were added here.
There is currently poor support for dark mode queries in mail clients. The main beneficiary of these changes will be Apple Mail and Outlook.
Enjoy the darkness 🕶️
