Commit Graph

541 Commits (431503bae2dc6e12bdade7d5d20f707112c2f7c2)

Author SHA1 Message Date
beatrix 04508868b0
Merge pull request #212 from aschmitz/feat/mute-reblogs
Allow hiding reblogs on a per-follow basis
2017-11-15 12:01:17 -05:00
David Yip 656d54e945 Maintain case-insensitivity when merging multiple matchers (#213)
When given two regexps, Regexp.union preserves the options set (or not
set) on each regex; this meant that none of the multiline (m),
case-insensitivity (i), or extended syntax (x) options were set.  Our
regexps are written expecting the m, i, and x options were set on all of
them, so we need to make sure that we preserve that behavior.
2017-11-13 11:06:02 -06:00
aschmitz 5128c4261e Updates per code review
Thanks, @valerauko!
2017-11-11 14:37:23 -06:00
aschmitz b95c48748c Per-user reblog hiding implementation/fixes/tests
Note that this will only hide/show *future* reblogs by a user, and does
nothing to remove/add reblogs that are already in the timeline. I don't
think that's a particularly confusing behavior, and it's a lot easier
to implement (similar to mutes, I believe).
2017-11-10 22:04:54 -06:00
aschmitz 4944515020 "Show reblogs" per-follower UI/database changes
TODO:

* Tests (particularly for FollowRequests).
* Anything to respect the setting when putting reblogs in timelines.
2017-11-09 08:41:10 -06:00
David Yip 870d71b78b Merge branch 'master' into gs-master 2017-10-27 09:45:25 -05:00
nullkal 781105293c Feature: Unlisted custom emojis (#5485) 2017-10-27 16:11:30 +02:00
beatrix a2612d0d38 Merge pull request #179 from glitch-soc/keyword-mute
Keyword muting
2017-10-25 17:37:48 -04:00
David Yip 42f2045c21 Merge remote-tracking branch 'STJrInuyasha/feature/direct-timeline' into gs-direct-timeline 2017-10-25 16:01:20 -05:00
David Yip e40fe4092d Remove nil check in Glitch::KeywordMute#=~.
@regex can no longer be nil, so we don't need to check it.
2017-10-24 19:03:59 -05:00
David Yip f5a3283976 Switch to Regexp.union for building the mute expression.
Also make the keyword-building methods private: they always probably
should have been private, but now I have encoded enough fun and games
into them that it now seems wrong for them to *not* be private.
2017-10-24 18:31:34 -05:00
David Yip 8410d33b49 Only cache the regex text, not the regex itself.
It is possible to cache a Regexp object, but I'm not sure what happens
if e.g. that object remains in cache across two different Ruby versions.
Caching a string seems to raise fewer questions.
2017-10-23 19:31:59 -05:00
Matthew Walsh 3db80f75a6 Added a timeline for Direct statuses
* Lists all Direct statuses you've sent and received
* Displayed in Getting Started
* Streaming server support for direct TL
2017-10-22 18:35:14 -07:00
David Yip af8f06413e KeywordMute matcher: more closely mimic Regexp#=~ behavior.
Regexp#=~ returns nil if it does not match.  An empty mute set does not
match any status, so KeywordMute::Matcher#=~ ought to return nil also.
2017-10-22 01:12:21 -05:00
David Yip 4b68e82a19 Don't add \b to whole-word keywords that don't start with word characters.
Ditto for ending with \b.

Consider muting the phrase "(hot take)".  I stipulate it is reasonable
to enter this with the default "match whole word" behavior.  Under the
old behavior, this would be encoded as

    \b\(hot\ take\)\b

However, if \b is before the first character in the string and the first
character in the string is not a word character, then the match will
fail.  Ditto for after.  In our example, "(" is not a word character, so
this will not match statuses containing "(hot take)", and that's a very
surprising behavior.

To address this, we only add leading and trailing \b to keywords that
start or end with word characters.
2017-10-22 00:38:54 -05:00
David Yip ad86c86fa8 Apply keyword mutes to reblogs. 2017-10-21 15:44:47 -05:00
David Yip 670e6a33f8 Move KeywordMute into Glitch namespace.
There are two motivations for this:

1. It looks like we're going to add other features that require
   server-side storage (e.g. user notes).

2. Namespacing glitchsoc modifications is a good idea anyway: even if we
   do not end up doing (1), if upstream introduces a keyword-mute feature
   that also uses a "KeywordMute" model, we can avoid some merge
   conflicts this way and work on the more interesting task of
   choosing which implementation to use.
2017-10-21 14:54:36 -05:00
David Yip 4a64181461 Allow keywords to match either substrings or whole words.
Word-boundary matching only works as intended in English and languages
that use similar word-breaking characters; it doesn't work so well in
(say) Japanese, Chinese, or Thai.  It's unacceptable to have a feature
that doesn't work as intended for some languages.  (Moreso especially
considering that it's likely that the largest contingent on the Mastodon
bit of the fediverse speaks Japanese.)

There are rules specified in Unicode TR29[1] for word-breaking across
all languages supported by Unicode, but the rules deliberately do not
cover all cases.  In fact, TR29 states

    For example, reliable detection of word boundaries in languages such
    as Thai, Lao, Chinese, or Japanese requires the use of dictionary
    lookup, analogous to English hyphenation.

So we aren't going to be able to make word detection work with regexes
within Mastodon (or glitchsoc).  However, for a first pass (even if it's
kind of punting) we can allow the user to choose whether they want word
or substring detection and warn about the limitations of this
implementation in, say, docs.

[1]: https://unicode.org/reports/tr29/
     https://web.archive.org/web/20171001005125/https://unicode.org/reports/tr29/
2017-10-21 14:54:36 -05:00
David Yip b4b657eb1d Invalidate cached matcher objects on KeywordMute commit. #164. 2017-10-21 14:54:36 -05:00
David Yip 693c66dfde Use more idiomatic string concatentation. #164.
The intent of the previous concatenation was to minimize object
allocations, which can end up being a slow killer.  However, it turns
out that under MRI 2.4.x, the shove-strings-in-an-array-and-join method
is not only arguably more common but (in this particular case) actually
allocates *fewer* objects than the string concatenation.

Or, at least, that's what I gather by running this:

    words = %w(palmettoes nudged hibernation bullish stockade's tightened Hades
    Dixie's formalize superego's commissaries Zappa's viceroy's apothecaries
    tablespoonful's barons Chennai tollgate ticked expands)

    a = Account.first

    KeywordMute.transaction do
      words.each { |w| KeywordMute.create!(keyword: w, account: a) }

      GC.start

      s1 = GC.stat

      re = String.new.tap do |str|
        scoped = KeywordMute.where(account: a)
        keywords = scoped.select(:id, :keyword)
        count = scoped.count

        keywords.find_each.with_index do |kw, index|
          str << Regexp.escape(kw.keyword.strip)
          str << '|' if index < count - 1
        end
      end

      s2 = GC.stat

      puts s1.inspect, s2.inspect

      raise ActiveRecord::Rollback
    end

vs this:

    words = %w( palmettoes nudged hibernation bullish stockade's tightened Hades Dixie's
    formalize superego's commissaries Zappa's viceroy's apothecaries tablespoonful's
    barons Chennai tollgate ticked expands
    )

    a = Account.first

    KeywordMute.transaction do
      words.each { |w| KeywordMute.create!(keyword: w, account: a) }

      GC.start

      s1 = GC.stat

      re = [].tap do |arr|
        KeywordMute.where(account: a).select(:keyword, :id).find_each do |m|
          arr << Regexp.escape(m.keyword.strip)
        end
      end.join('|')

      s2 = GC.stat

      puts s1.inspect, s2.inspect

      raise ActiveRecord::Rollback
    end

Using rails r, here is a comparison of the total_allocated_objects and
malloc_increase_bytes GC stat data:

                 total_allocated_objects        malloc_increase_bytes
string concat    3200241 -> 3201428 (+1187)     1176 -> 45216 (44040)
array join       3200380 -> 3201299 (+919)      1176 -> 36448 (35272)
2017-10-21 14:54:36 -05:00
David Yip a4851100fd Make use of the regex attr_reader. #164.
It would also have been valid to get rid of the attr_reader, but I like
being able to reach inside KeywordMute::Matcher without resorting to
instance_variable_get tomfoolery.
2017-10-21 14:54:36 -05:00
David Yip 603cf02b70 Rework KeywordMute interface to use a matcher object; spec out matcher. #164.
A matcher object that builds a match from KeywordMute data and runs it
over text is, in my view, one of the easier ways to write examples for
this sort of thing.
2017-10-21 14:54:36 -05:00
David Yip 4745d6eeca Spec out KeywordMute interface. #164. 2017-10-21 14:54:21 -05:00
David Yip 9093e2de7a Add KeywordMute model.
Gist of the proposed keyword mute implementation:

Keyword mutes are represented server-side as one keyword per record.
For each account, there exists a keyword regex that is generated as one
big alternation of all keywords.  This regex is cached (in Redis, I
guess) so we can quickly get it when filtering in FeedManager.
2017-10-21 14:53:41 -05:00
David Yip dbb1fce94d Merge remote-tracking branch 'upstream/master' into gs-master 2017-10-16 09:23:59 -05:00
Nolan Lawson fa0be3f834 Add option to reduce motion (#5393)
* Add option to reduce motion

* Use HOC to wrap all Motion calls

* fix case-sensitive issue

* Avoid updating too frequently

* Get rid of unnecessary change to _simple_status.html.haml
2017-10-16 09:36:15 +02:00
David Yip 6cd5b3bbe5 Merge remote-tracking branch 'origin/master' into gs-master 2017-10-16 01:29:02 -05:00
unarist a1c54220e8 Optimize Status#permitted_for 500x (account timeline) (#5373)
The main change of this PR is removing `order by visibility` hack.

This was introduced to force using of `index_statuses_on_account_id` instead of PK index, but it seems no longer needed probably due to `index_statuses_on_account_id_id`. Removing this avoids reading all rows, so really improves first fetching of the user who has lot of statuses.

I have also changed JOIN to IN + subquery, which slightly faster in most cases.
2017-10-13 16:53:43 +02:00
Eugen Rochko b8db386e05 Fix UserTrackingConcern firing on every request, optimize some queries (#5368)
- For some reason, :if option on before_action did not work. It got
  executed every time, returned false, and the action run anyway,
  which led to the current_sign_in_at and sign_in_count being
  updated on every request
- Return "do not filter" early in FeedManager#filter_from_home? if
  the status is authored by receiver. Usually this method is not
  called for own statuses at all, but it is called when Feed#get
  uses the database
- Return early if #reload_stale_associations! has nothing to load
  to save a database query with WHERE 1=0
2017-10-13 16:44:29 +02:00
Lex Alexander b8bae96647 Retoot count increases without reason (#5363)
* Retoot count increases without reason

-The store_uri method for Statuses was being called on after_create and causing reblogs to be incremented twice.
-This calls it when the transaction is finished by using after_create_commit.
-Fixes #4916.

* Added test case for after_create_commit callback for checking reblog count.

* Rewrote test to keep original, but added one for only the after_create_commit callback.
2017-10-13 02:52:09 +02:00
kibigo! 8d6b9ba494 Merge upstream 2.0ish #165 2017-10-11 10:43:10 -07:00
nullkal 6c54d2e583 foreign_key, non-nullable, dependent: destroy in account_moderation_notes (#5294)
* Add foreign key constraint to column `account` in `account_moderation_notes`

* Change account_id and target_account_id to non-nullable in account_moderation_notes

* Add dependent: :destroy to account and target_account in account_moderation_notes
2017-10-10 13:12:17 +02:00
beatrix f0a2a6c875 try to tighten up local only toot stuff, like... properly (#163)
* try to tighten up local only toot stuff, like... properly

* try to un-break tests
2017-10-09 09:56:17 -04:00
Eugen Rochko 0717d9b3e6 Set snowflake IDs for backdated statuses (#5260)
- Rename Mastodon::TimestampIds into Mastodon::Snowflake for clarity
- Skip for statuses coming from inbox, aka delivered in real-time
- Skip for statuses that claim to be from the future
2017-10-08 17:34:34 +02:00
DJ Sundog 979b0d66a7 update indentation 2017-10-07 13:53:46 -07:00
DJ Sundog 6ca03a7f58 add faststart to audio transcoding 2017-10-07 19:59:22 +00:00
DJ Sundog 96ba3482b9 adding support for audio uploads, transcoded to mp4 videos 2017-10-07 19:54:10 +00:00
nullkal 633426b261 Add moderation note (#5240)
* Add moderation note

* Add frozen_string_literal

* Make rspec pass
2017-10-07 20:26:43 +02:00
Eugen Rochko 3a3475450e Encode custom emojis as resolveable objects in ActivityPub (#5243)
* Encode custom emojis as resolveable objects in ActivityPub

* Improve code style
2017-10-07 17:43:42 +02:00
Eugen Rochko 49cc0eb3e7 Improve admin UI for custom emojis, add copy/disable/enable (#5231) 2017-10-05 23:42:05 +02:00
Eugen Rochko b9c76e2edb When processing custom emoji, ensure a non-animated version exists (#5230)
Use the non-animated version in web UI, but return both in API
2017-10-05 23:41:47 +02:00
utam0k b3af3f9f8c Implement EmailBlackList (#5109)
* Implement BlacklistedEmailDomain

* Use Faker::Internet.domain_name

* Remove note column

* Add frozen_string_literal comment

* Delete unnecessary codes

* Sort alphabetically

* Change of wording

* Rename BlacklistedEmailDomain to EmailDomainBlock
2017-10-04 15:16:10 +02:00
aschmitz 468523f4ad Non-Serial ("Snowflake") IDs (#4801)
* Use non-serial IDs

This change makes a number of nontrivial tweaks to the data model in
Mastodon:

* All IDs are now 8 byte integers (rather than mixed 4- and 8-byte)
* IDs are now assigned as:
  * Top 6 bytes: millisecond-resolution time from epoch
  * Bottom 2 bytes: serial (within the millisecond) sequence number
  * See /lib/tasks/db.rake's `define_timestamp_id` for details, but
    note that the purpose of these changes is to make it difficult to
    determine the number of objects in a table from the ID of any
    object.
* The Redis sorted set used for the feed will have values used to look
  up toots, rather than scores. This is almost always the same as the
  existing behavior, except in the case of boosted toots. This change
  was made because Redis stores scores as double-precision floats,
  which cannot store the new ID format exactly. Note that this doesn't
  cause problems with sorting/pagination, because ZREVRANGEBYSCORE
  sorts lexicographically when scores are tied. (This will still cause
  sorting issues when the ID gains a new significant digit, but that's
  extraordinarily uncommon.)

Note a couple of tradeoffs have been made in this commit:

* lib/tasks/db.rake is used to enforce many/most column constraints,
  because this commit seems likely to take a while to bring upstream.
  Enforcing a post-migrate hook is an easier way to maintain the code
  in the interim.
* Boosted toots will appear in the timeline as many times as they have
  been boosted. This is a tradeoff due to the way the feed is saved in
  Redis at the moment, but will be handled by a future commit.

This would effectively close Mastodon's #1059, as it is a
snowflake-like system of generating IDs. However, given how involved
the changes were simply within Mastodon, it may have unexpected
interactions with some clients, if they store IDs as doubles
(or as 4-byte integers). This was a problem that Twitter ran into with
their "snowflake" transition, particularly in JavaScript clients that
treated IDs as JS integers, rather than strings. It therefore would be
useful to test these changes at least in the web interface and popular
clients before pushing them to all users.

* Fix JavaScript interface with long IDs

Somewhat predictably, the JS interface handled IDs as numbers, which in
JS are IEEE double-precision floats. This loses some precision when
working with numbers as large as those generated by the new ID scheme,
so we instead handle them here as strings. This is relatively simple,
and doesn't appear to have caused any problems, but should definitely
be tested more thoroughly than the built-in tests. Several days of use
appear to support this working properly.

BREAKING CHANGE:

The major(!) change here is that IDs are now returned as strings by the
REST endpoints, rather than as integers. In practice, relatively few
changes were required to make the existing JS UI work with this change,
but it will likely hit API clients pretty hard: it's an entirely
different type to consume. (The one API client I tested, Tusky, handles
this with no problems, however.)

Twitter ran into this issue when introducing Snowflake IDs, and decided
to instead introduce an `id_str` field in JSON responses. I have opted
to *not* do that, and instead force all IDs to 64-bit integers
represented by strings in one go. (I believe Twitter exacerbated their
problem by rolling out the changes three times: once for statuses, once
for DMs, and once for user IDs, as well as by leaving an integer ID
value in JSON. As they said, "If you’re using the `id` field with JSON
in a Javascript-related language, there is a very high likelihood that
the integers will be silently munged by Javascript interpreters. In most
cases, this will result in behavior such as being unable to load or
delete a specific direct message, because the ID you're sending to the
API is different than the actual identifier associated with the
message." [1]) However, given that this is a significant change for API
users, alternatives or a transition time may be appropriate.

1: https://blog.twitter.com/developer/en_us/a/2011/direct-messages-going-snowflake-on-sep-30-2011.html

* Restructure feed pushes/unpushes

This was necessary because the previous behavior used Redis zset scores
to identify statuses, but those are IEEE double-precision floats, so we
can't actually use them to identify all 64-bit IDs. However, it leaves
the code in a much better state for refactoring reblog handling /
coalescing.

Feed-management code has been consolidated in FeedManager, including:

* BatchedRemoveStatusService no longer directly manipulates feed zsets
* RemoveStatusService no longer directly manipulates feed zsets
* PrecomputeFeedService has moved its logic to FeedManager#populate_feed

(PrecomputeFeedService largely made lots of calls to FeedManager, but
didn't follow the normal adding-to-feed process.)

This has the effect of unifying all of the feed push/unpush logic in
FeedManager, making it much more tractable to update it in the future.

Due to some additional checks that must be made during, for example,
batch status removals, some Redis pipelining has been removed. It does
not appear that this should cause significantly increased load, but if
necessary, some optimizations are possible in batch cases. These were
omitted in the pursuit of simplicity, but a batch_push and batch_unpush
would be possible in the future.

Tests were added to verify that pushes happen under expected conditions,
and to verify reblog behavior (both on pushing and unpushing). In the
case of unpushing, this includes testing behavior that currently leads
to confusion such as Mastodon's #2817, but this codifies that the
behavior is currently expected.

* Rubocop fixes

I could swear I made these changes already, but I must have lost them
somewhere along the line.

* Address review comments

This addresses the first two comments from review of this feature:

https://github.com/tootsuite/mastodon/pull/4801#discussion_r139336735
https://github.com/tootsuite/mastodon/pull/4801#discussion_r139336931

This adds an optional argument to FeedManager#key, the subtype of feed
key to generate. It also tests to ensure that FeedManager's settings are
such that reblogs won't be tracked forever.

* Hardcode IdToBigints migration columns

This addresses a comment during review:
https://github.com/tootsuite/mastodon/pull/4801#discussion_r139337452

This means we'll need to make sure that all _id columns going forward
are bigints, but that should happen automatically in most cases.

* Additional fixes for stringified IDs in JSON

These should be the last two. These were identified using eslint to try
to identify any plain casts to JavaScript numbers. (Some such casts are
legitimate, but these were not.)

Adding the following to .eslintrc.yml will identify casts to numbers:

~~~
  no-restricted-syntax:
  - warn
  - selector: UnaryExpression[operator='+'] > :not(Literal)
    message: Avoid the use of unary +
  - selector: CallExpression[callee.name='Number']
    message: Casting with Number() may coerce string IDs to numbers
~~~

The remaining three casts appear legitimate: two casts to array indices,
one in a server to turn an environment variable into a number.

* Only implement timestamp IDs for Status IDs

Per discussion in #4801, this is only being merged in for Status IDs at
this point. We do this in a migration, as there is no longer use for
a post-migration hook. We keep the initialization of the timestamp_id
function as a Rake task, as it is also needed after db:schema:load (as
db/schema.rb doesn't store Postgres functions).

* Change internal streaming payloads to stringified IDs as well

This is equivalent to 591a9af356 from
#5019, with an extra change for the addition to FeedManager#unpush.

* Ensure we have a status_id_seq sequence

Apparently this is not a given when specifying a custom ID function,
so now we ensure it gets created. This uses the generic version of this
function to more easily support adding additional tables with timestamp
IDs in the future, although it would be possible to cut this down to a
less generic version if necessary. It is only run during db:schema:load
or the relevant migration, so the overhead is extraordinarily minimal.

* Transition reblogs to new Redis format

This provides a one-way migration to transition old Redis reblog entries
into the new format, with a separate tracking entry for reblogs.

It is not invertible because doing so could (if timestamp IDs are used)
require a database query for each status in each users' feed, which is
likely to be a significant toll on major instances.

* Address review comments from @akihikodaki

No functional changes.

* Additional review changes

* Heredoc cleanup

* Run db:schema:load hooks for test in development

This matches the behavior in Rails'
ActiveRecord::Tasks::DatabaseTasks.each_current_configuration, which
would otherwise break `rake db:setup` in development.

It also moves some functionality out to a library, which will be a good
place to put additional related functionality in the near future.
2017-10-04 09:56:37 +02:00
aschmitz 97c02c3389 Make IdsToBigints (mostly!) non-blocking (#5088)
* Make IdsToBigints (mostly!) non-blocking

This pulls in GitLab's MigrationHelpers, which include code to make
column changes in ways that Postgres can do without locking. In general,
this involves creating a new column, adding an index and any foreign
keys as appropriate, adding a trigger to keep it populated alongside
the old column, and then progressively copying data over to the new
column, before removing the old column and replacing it with the new
one.

A few changes to GitLab's MigrationHelpers were necessary:

* Some changes were made to remove dependencies on other GitLab code.
* We explicitly wait for index creation before forging ahead on column
  replacements.
* We use different temporary column names, to avoid running into index
  name length limits.
* We rename the generated indices back to what they "should" be after
  replacing columns.
* We rename the generated foreign keys to use the new column names when
  we had to create them. (This allows the migration to be rolled back
  without incident.)

# Big Scary Warning

There are two things here that may trip up large instances:

1. The change for tables' "id" columns is not concurrent. In
   particular, the stream_entries table may be big, and does not
   concurrently migrate its id column. (On the other hand, x_id type
   columns are all concurrent.)
2. This migration will take a long time to run, *but it should not
   lock tables during that time* (with the exception of the "id"
   columns as described above). That means this should probably be run
   in `screen` or some other session that can be run for a long time.
   Notably, the migration will take *longer* than it would without
   these changes, but the website will still be responsive during that
   time.

These changes were tested on a relatively large statuses table (256k
entries), and the service remained responsive during the migration.
Migrations both forward and backward were tested.

* Rubocop fixes

* MigrationHelpers: Support ID columns in some cases

This doesn't work in cases where the ID column is referred to as a
foreign key by another table.

* MigrationHelpers: support foreign keys for ID cols

Note that this does not yet support foreign keys on non-primary-key
columns, but Mastodon also doesn't yet have any that we've needed to
migrate.

This means we can perform fully "concurrent" migrations to change ID
column types, and the IdsToBigints migration can happen with effectively
no downtime. (A few operations require a transaction, such as renaming
columns or deleting them, but these transactions should not block for
noticeable amounts of time.)

The algorithm for generating foreign key names has changed with this,
and therefore all of those changed in schema.rb.

* Provide status, allow for interruptions

The MigrationHelpers now allow restarting the rename of a column if it
was interrupted, by removing the old "new column" and re-starting the
process.

Along with this, they now provide status updates on the changes which
are happening, as well as indications about when the changes can be
safely interrupted (when there are at least 10 seconds estimated to be
left before copying data is complete).

The IdsToBigints migration now also sorts the columns it migrates by
size, starting with the largest tables. This should provide
administrators a worst-case scenario estimate for the length of
migrations: each successive change will get faster, giving admins a
chance to abort early on if they need to run the migration later. The
idea is that this does not force them to try to time interruptions
between smaller migrations.

* Fix column sorting in IdsToBigints

Not a significant change, but it impacts the order of columns in the
database and db/schema.rb.

* Actually pause before IdsToBigints
2017-10-02 21:28:59 +02:00
Eugen Rochko f4ca116ea8 After 7 days of repeated delivery failures, give up on inbox (#5131)
- A successful delivery cancels it out
- An incoming delivery from account of the inbox cancels it out
2017-09-29 03:16:20 +02:00
Eugen Rochko 887cd94e96 Increase attachment descriptions to 420 characters (#5139)
Blaze it
2017-09-29 02:30:00 +02:00
Eugen Rochko 76f360c625 If HTTP signature is wrong and webfinger cache is stale, retry with resolve (#5129)
If the signature could not be verified and the webfinger of the account
was last retrieved longer than the cache period, try re-resolving the
account and then attempting to verify the signature again
2017-09-28 17:50:14 +02:00
Eugen Rochko 4ec1771165 Add ability to specify alternative text for media attachments (#5123)
* Fix #117 - Add ability to specify alternative text for media attachments

- POST /api/v1/media accepts `description` straight away
- PUT /api/v1/media/:id to update `description` (only for unattached ones)
- Serialized as `name` of Document object in ActivityPub
- Uploads form adjusted for better performance and description input

* Add tests

* Change undo button blend mode to difference
2017-09-28 15:31:31 +02:00
Ondřej Hruška daad07b1d5
Merge remote-tracking branch 'origin/better-themeing' into merging-upstream 2017-09-28 09:20:59 +02:00
Ondřej Hruška 83bda6c1a8
Merge commit 'b9f59ebcc68e9da0a7158741a1a2ef3564e1321e' into merging-upstream 2017-09-28 09:18:35 +02:00