Summary:
The goal is to make fulltext search back-ends more extensible, configurable and robust.
When this is finished it will be possible to have multiple search storage back-ends and
potentially multiple instances of each.
Individual instances can be configured with roles such as 'read', 'write' which control
which hosts will receive writes to the index and which hosts will respond to queries.
These two roles make it possible to have any combination of:
* read-only
* write-only
* read-write
* disabled
This 'roles' mechanism is extensible to add new roles should that be needed in the future.
In addition to supporting multiple elasticsearch and mysql search instances, this refactors
the connection health monitoring infrastructure from PhabricatorDatabaseHealthRecord and
utilizes the same system for monitoring the health of elasticsearch nodes. This will
allow Wikimedia's phabricator to be redundant across data centers (mysql already is,
elasticsearch should be as well).
The real-world use-case I have in mind here is writing to two indexes (two elasticsearch clusters
in different data centers) but reading from only one. Then toggling the 'read' property when
we want to migrate to the other data center (and when we migrate from elasticsearch 2.x to 5.x)
Hopefully this is useful in the upstream as well.
Remaining TODO:
* test cases
* documentation
Test Plan:
(WARNING) This will most likely require the elasticsearch index to be deleted and re-created due to schema changes.
Tested with elasticsearch versions 2.4 and 5.2 using the following config:
```lang=json
"cluster.search": [
{
"type": "elasticsearch",
"hosts": [
{
"host": "localhost",
"roles": { "read": true, "write": true }
}
],
"port": 9200,
"protocol": "http",
"path": "/phabricator",
"version": 5
},
{
"type": "mysql",
"roles": { "write": true }
}
]
Also deployed the same changes to Wikimedia's production Phabricator instance without any issues whatsoever.
```
Reviewers: epriestley, #blessed_reviewers
Reviewed By: epriestley, #blessed_reviewers
Subscribers: Korvin, epriestley
Tags: #elasticsearch, #clusters, #wikimedia
Differential Revision: https://secure.phabricator.com/D17384
Summary:
Ref T12271. Don't do anything with this yet, but store who accepted/rejected/whatever on behalf of reviewers.
In the future, we could use this to render stuff like "Blessed Committers (accepted by epriestley)" or whatever. I don't know that this is necessarily super useful, but it's easy to track, seems likely to be useful, and would be a gigantic pain to backfill later if we decide we want it.
Test Plan: Accepted/rejected a revision, saw reviewers update appropriately.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T12271
Differential Revision: https://secure.phabricator.com/D17537
Summary:
Ref T10967. We still have double writes, so all reviewers are being written to both old and new storage. This migrates all the data in the old storage to the new storage, so both storage tables should have a complete set of data and be getting identical updates as we move forward.
After this, I can move readers over one at a time and eventually get rid of the old writes and old storage.
This loads all of the edge data into memory in a big chunk. I reached out to one install to get some more information about their data size. Ours is quite manageable and I think even large installs will probably fit into memory, but we can do this in chunks if not.
However, because the Edge table doesn't have an `id` column, we can't use either the `RawMigrationIterator` or the `MigrationIterator`, and would need to write a new `EdgeMigrationIterator`. This isn't tons of work but might not be necessary.
Test Plan: Ran the migration locally, spot-checked the results in the database for sanity and correctness.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10967
Differential Revision: https://secure.phabricator.com/D17515
Summary:
Ref T10967. We have a "commented" state to help reviewers get a better sense of who is part of a discussion, and a "last action" state to help distinguish between "accept" and "accepted an older version", for the purposes of sticky accepts and as a UI hint.
Currently, these are first-class states, partly beacuse we were somewhat limited in what we could do with edges. However, a more flexible way to represent them is as flags separate from the primary state flag.
In the new storage, write them as separate state information: `lastActionDiffPHID` stores the Diff PHID of the last review action (accept, reject, etc). `lastCommentDiffPHID` stores the Diff PHID of the last comment (top-level or inline).
Test Plan: Applied storage changes, commented and acted on a revision. Saw appropriate state reflected in the database.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10967
Differential Revision: https://secure.phabricator.com/D17514
Summary:
Via HackerOne. When you view a raw file in Differential, we currently generate a permanent file with default permissions. This may be incorrect: default permissions may be broader than the diff's permissions.
The other three methods of downloading/viewing raw files ("Download" in Diffusion and Differential, "View Raw" in Diffusion and Differential) already apply policies correctly and generate temporary files. However, this workflow was missed when other workflows were updated.
Beyond updating the workflow, delete any files we've generated in the past. This wipes the slate clean on any security issues and frees up a little disk space.
Test Plan:
- Ran migration script, saw existing files get purged.
- Did "View Raw File", got a new file.
- Verified that the file was temporary and properly attached to the diff, with "NO ONE" permissions.
- Double-checked that Diffusion already runs policy logic correctly and applies appropriate policies.
- Double-checked that "Download Raw Diff" in Differential already runs policy logic correctly.
- Double-chekced that "Download Raw Diff" in Diffusion already runs policy logic correctly.
Reviewers: chad
Reviewed By: chad
Differential Revision: https://secure.phabricator.com/D17504
Summary:
Ref T10967. This is an incremental step toward removing "reviewers" back to a dedicated storage table so we can handle changes like T11050.
This adds the storage table, and starts doing double writes to it (so new or updated reviewers write to both the old edge table and the new "reviewers" table).
Then we can do a migration, swap readers over one at a time, and eventually remove the old write and old storage and then implement new features.
This change has no user-facing impact, it just causes us to write new data to two places instead of one.
This is not completely exhaustive: the Herald "Add Reviewers" action is still doing a manual EDGE transaction. I'll clean that up next and do another pass to look for anything else I missed.
This is also a bit copy/pastey for now but the logic around "RESIGN" is a little different in the two cases until T11050. I'll unify it in future changes.
Test Plan:
- Did a no-op edit.
- Did a no-op comment.
- Added reviewers.
- Removed reviewers.
- Accepted and rejected revisions.
After all of these edits, did a `SELECT * FROM differential_reviewer` manually and saw consistent-looking rows in the database.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10967
Differential Revision: https://secure.phabricator.com/D17495
Summary: Ref T10319. Adds in database columns for upcoming default generated avatar support.
Test Plan: Ran storage upgrade, log into local site to verify it didn't blow up.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin
Maniphest Tasks: T10319
Differential Revision: https://secure.phabricator.com/D17459
Summary: Ref T12314. Provides a field on tasks for storing subtypes. Does nothing interesting yet.
Test Plan:
- Ran storage upgrade.
- Created some tasks.
- Looked in the database.
- Used Conduit to query some tasks.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T12314
Differential Revision: https://secure.phabricator.com/D17441
Summary:
Ref T12314. This adds storage so EditEngine forms can later be marked as edit fields for particular types of objects (like an "animal edit form" vs a "plant edit form").
We'll take you to the right edit form when you click "Edit" by selecting among forms with the same subtype as the task.
This doesn't do anything very interesting on its own.
Test Plan:
- Ran `bin/storage upgrade`.
- Verified database got the field with proper values.
- Created a new form, checked the database.
- Ran unit tests.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T12314
Differential Revision: https://secure.phabricator.com/D17439
Summary: Ref T11957. Needs some more polish, but I think everything here is square.
Test Plan: Add personal/global items to home, test mobile. Test workboards / colors.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: 20after4, rfreebern, Korvin
Maniphest Tasks: T11957
Differential Revision: https://secure.phabricator.com/D17259
Summary: Removes the often funny, but never really used but will cause us bug reports someday.... cat facts.
Test Plan: Install cat facts, run storage upgrade, see no cat facts in menu.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin
Maniphest Tasks: T12126
Differential Revision: https://secure.phabricator.com/D17233
Summary: Fixes T12090. In obscure situations lost to the mists of time, the `changes` column could be `null`. Force a string cast so the migration finishes, even though these changesets are likely meaningless.
Test Plan:
I did a force-reapply as a sanity check:
```
$ ./bin/storage upgrade -f --apply phabricator:20161213.diff.01.hunks.php
```
That went cleanly; it would only have caught dramatic errors, but I didn't completely butcher things.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T12090
Differential Revision: https://secure.phabricator.com/D17168
Summary:
Fixes T10968. In rare situations, we can generate a diff, then hit an error which causes this update to fail.
When it does, we tend to get stuck in a loop creating diffs, which can fill the database up with garbage. We saw this once in the Phacility cluster, and one instance hit it, too.
Instead: when we create a diff, keep track of which commit we generated it from. The next time through, reuse it if we already built it.
Test Plan:
- Used `bin/differential attach-commit <commit> <revision>` to hit this code.
- Simulated a filesystem write failure, saw the diff get reused.
- Also did a normal update, which worked properly.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10968
Differential Revision: https://secure.phabricator.com/D17164
Summary: Ref T5867, adds a customPHID field, nullable, and lets you query by it... i think? Not fully able to grok all the EditEngine stuff, but I think this is the right place for the query.
Test Plan: Not wired to anything, but pulling up project menu, editing, all still works.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin
Maniphest Tasks: T5867
Differential Revision: https://secure.phabricator.com/D17149
Summary: Build ngram indexs, adds search by name capability.
Test Plan: Search for a dashboard by partial name, search for a panel by partial name.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin
Differential Revision: https://secure.phabricator.com/D17090
Summary: Fixes T12020. These callsites to `getPhrictionSlug()` were missed when that method was removed. They're very old (early 2014, late 2011).
Test Plan:
These are tricky to test because the migrations are so ancient, but `bin/storage upgrade --force --apply phabricator:20140521.projectslug.2.mig.php` gave me //plausible// results.
The other migration is so ancient that it can't apply to a modern database so I'm just kind of winging that one. We probably have essentially no installs which will ever apply it again, though.
Reviewers: chad, avivey
Reviewed By: avivey
Maniphest Tasks: T12020
Differential Revision: https://secure.phabricator.com/D17060
Summary:
Ref T8475. This forces installs to migrate hunks to the modern format.
We stopped writing to the legacy format a very long time ago (2+ years?) without issues.
This doesn't destroy any data. T8623 has guidance and I'll publish more changelog guidance.
Test Plan: Faked some legacy data and migrated it.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T8475
Differential Revision: https://secure.phabricator.com/D17039
Summary: Didn't grep this good enough.
Test Plan: `bin/storage upgrade -f --apply ..`, got a clean apply.
Reviewers: chad
Reviewed By: chad
Differential Revision: https://secure.phabricator.com/D17046
Summary: Allows users set an icon (for reuse on upcoming home) for their dashboard based on 16 descriminating choices.
Test Plan: Create a new dashboard, set new icon. Edit an existing dashboard, set icon.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin
Differential Revision: https://secure.phabricator.com/D17042
Summary: Adds authorPHID to panels so we can default to the panels you made.
Test Plan: Run upgrade, visit manage panels, see my panels. Create a new panel. Edit a panel.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin
Differential Revision: https://secure.phabricator.com/D17036
Summary: Adds an authorPHIDs, populates olds ones.
Test Plan: Make a new Dashboard, see that I created it.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin
Differential Revision: https://secure.phabricator.com/D17022
Summary:
Ref T11957. This renames the Configuration storage, transaction, query, and PHID type.
No rename on the actual menu item types yet, that's next (and should be the end of this, I think).
Test Plan:
- Viewed projects.
- Viewed profiles.
- Edited a project menu.
- Grepped for all renamed symbols, I think?
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T11957
Differential Revision: https://secure.phabricator.com/D17027
Summary:
Ref T11922. After updating to HEAD of `master`, you need to manually rebuild the index. We don't do this during `bin/storage upgrade` because it can take a very long time (`secure.phabricator.com` took roughly an hour) and can happen while Phabricator is running.
However, if we don't warn users about this they'll just get a broken index unless they go read the changelog (or file an issue, then we tell them to go read the changelog).
This adds a very simple table for notes to administrators so we can write a "you need to go rebuild the index" note, then adds one.
Administrators clear the note by completing the activity and running `bin/config done reindex`. This isn't automatic because there are various strategies you can use to approach the issue, which I'll discuss in greater detail in the linked documentation.
Also, fix an issue where `bin/storage upgrade --apply <patch>` could try to re-mark an already-applied patch as applied.
Test Plan:
- Ran storage ugrades.
- Got instructions to rebuild search index.
- Cleared instructions with `bin/config done reindex`.
Reviewers: chad
Reviewed By: chad
Subscribers: avivey
Maniphest Tasks: T11922
Differential Revision: https://secure.phabricator.com/D16965
Summary:
Ref T6740. When we index a document, also save a copy of the stemmed version.
When querying, search the combined corpus for the terms.
(We may need to tune this a bit later since it's possible for literal, quoted terms to match in the stemmed section, but I think this wil rarely cause issues in practice.)
A downside here is that search sort of breaks if you upgrade into this and don't reindex. I wasn't able to find a way to issue the query that remained compatible with older indexes and didn't have awful performance, so my plan is:
- Put this on `secure`.
- Rebuild the index.
- If things look good after a couple of days, add a way that we can tell people they need to rebuild the search index with a setup warning.
We might get some reports between now and then, but if this is super awful we should know by the end of the weekend.
Test Plan:
WOW AMAZING
{F2021466}
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T6740
Differential Revision: https://secure.phabricator.com/D16947
Summary:
Ref T11741. InnoDB uses a stopwords table instead of a stopwords file.
During `storage upgrade`, synchronize the table from the stopwords file on disk.
Test Plan:
- Ran `storage upgrade`.
- Ran `select * from stopwords`, saw stopwords.
- Added some garbage to the table.
- Ran `storage upgrade`, saw it remove it.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T11741
Differential Revision: https://secure.phabricator.com/D16940
Summary:
Ref T11044. One popular tool in a modern operations environment is Puppet. The primary purpose of this tool is to randomly revert hosts to older or different configurations.
Introducing an element of chaotic unpredictability into operations trains staff to be on high alert at all times, rather than lulled into complacency by predictability or consistency.
When Puppet reverts a Phabricator host's configuration to an older version, we might start writing data to a lot of crazy places where it shouldn't go. This will create a big sticky mess that is virtually impossible to undo, mostly because we'll get two files with ID 123 or two tasks with ID 456 or whatever else and good luck with that.
Instead, after changing the partition layout, require `bin/storage partition` to be run. This writes a copy of the config everywhere.
Then, when we start serving web requests, make sure every database has the exact same config. This will foil Puppet by refusing to run requests on hosts it has reverted.
Test Plan:
- Changed partition configuration.
- Ran Phabricator.
- FOILED!
- Ran `bin/storage partition` to sync config.
- Things worked again.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T11044
Differential Revision: https://secure.phabricator.com/D16910
Summary: Adds a headerimage and lets you set it on posts for added reverence. Is that a word?
Test Plan:
Add an image, see an image.
{F1923010}
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin
Differential Revision: https://secure.phabricator.com/D16873
Summary: No view engine yet (adding header image next), but adds subtitle to display like PhameBlog
Test Plan: Add a subtitle, remove a subtitle.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin
Differential Revision: https://secure.phabricator.com/D16871
Summary:
Ref T11816.
- Now that we can do something meaningful with them, bring back the yellow dots for "busy".
- Default to "busy" when attending events (we could make this "busy" for short events and "away" for long events or something).
- Let users pick how to display their attending status on the event page.
- Also show which event the user is attending since I had to mess with the cache code anyway. We can get rid of this again if it doesn't feel good.
Test Plan:
{F1904179}
{F1904180}
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T11816
Differential Revision: https://secure.phabricator.com/D16802
Summary: Ref T11809. These have been replaced with more flexible storage that accommodates a wider range of behaviors, including those in the ICS format and RRULEs.
Test Plan:
- Ran migration.
- Viewed, created, edited events.
- Grepped for all removed names/symbols.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T11809
Differential Revision: https://secure.phabricator.com/D16789
Summary:
Ref T11809. This came out of Facebook many years ago for computing the number of business days that revisions had been stale.
We removed the little staleness marker a few months ago and haven't seen complaints about it.
If we did holidays now it would make sense to integrate them more directly with Calendar as real events, but I have no plans to pursue this anytime soon. It's easy enough to add the federal holidays manually (~5 minutes of work per year?) if you want them, and they're commentable/editable and you can add local holidays if you're not in the US.
Test Plan:
- Ran `bin/storage upgrade -f`.
- Grepped for `CalendarHoliday`.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T11809
Differential Revision: https://secure.phabricator.com/D16788
Summary:
Ref T7931. I'm going to do this separate from existing infrastructure because:
- events start at different times for different users;
- I like the idea of being able to batch stuff (send one email about several upcoming events);
- triggering on ghost/recurring events is a real complicated mess.
This puts a skeleton in place that finds all the events we need to notify about and writes some silly example bodies to stdout, marking that we notified users so they don't get notified again.
Test Plan:
Ran `bin/calendar notify`, got a "great" notification in the command output.
{F1891625}
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T7931
Differential Revision: https://secure.phabricator.com/D16783
Summary:
When you edit "X and all future events", X becomes the new parent of an event series.
Currently, it loses its relationship to its original parent. Instead, retain that relationship -- it's separate from the normal "parent", but we can use it to make the UI more clear or tweak behaviors later.
This mostly just keeps us from losing/destroying data that we might need/want later.
Test Plan:
- Ran migrations.
- Cancelled "X and all future events", saw sensible-appearing beahvior in the database for "seriesParentPHID".
Reviewers: chad
Reviewed By: chad
Differential Revision: https://secure.phabricator.com/D16780
Summary: Makes a more complete PDF looking invoice form for printing in Phortune.
Test Plan: Make an invoice, click print view, print.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin
Differential Revision: https://secure.phabricator.com/D16762
Summary: Is a logo. For merchants.
Test Plan: Set a new logo, remove it. See on list.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin
Maniphest Tasks: T7607
Differential Revision: https://secure.phabricator.com/D16751
Summary:
Ref T10747. When we import a ".ics" file, represent any attendees as simple external references.
For consistency with other areas of the product, I've avoided disclosing email addresses. We'll try to get a real name if we can.
(We store addresses and could expose or use them later, or do some kind of masking junk like "epr...ley@g...l.com" which is utterly impossible to figure out.)
Test Plan: {F1888367}
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10747
Differential Revision: https://secure.phabricator.com/D16759
Summary:
Ref T10747. For URI-based (and, in the future, Google-based) imports, we can automatically refresh them periodically.
(In the general case there's no way to get a push notification for an ICS file, so we just have to do this every-so-often.)
Test Plan:
- Set an ICS file to update hourly.
- Used `bin/trigger fire --id ...` to fire it artificially.
- Saw Calendar update.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10747
Differential Revision: https://secure.phabricator.com/D16752
Summary: Part of making this look/feel/be more professional is having decent receipts for billing, including contact information (whatever we want to put in there). I'm not using this anywhere at the moment, but will.
Test Plan: Add Contact Info, see Contact Info. Also, why is Remarkup not rendering with line breaks? Seems to be a OneOff thing... anywho... bears!
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin
Maniphest Tasks: T7607
Differential Revision: https://secure.phabricator.com/D14125
Summary: Ref T11730. Removes the unused column, seen no issues during past week migrations.
Test Plan: Run migration, check database no longer contains column.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin
Maniphest Tasks: T11730
Differential Revision: https://secure.phabricator.com/D16711
Summary: Ref T10747. When stuff goes wrong (or right) let the user know what happened.
Test Plan: {F1870139}
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10747
Differential Revision: https://secure.phabricator.com/D16704
Summary:
Ref T10747. Adds a bunch of stuff so we can keep track of which events we've imported from external sources.
This doesn't do anything yet: you can't actually import anything.
Test Plan:
- Ran `bin/storage upgrade`.
- Clicked "Imports", saw an empty wasteland.
- Created/edited events.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10747
Differential Revision: https://secure.phabricator.com/D16696
Summary: Ref T3165. Builds an ngram table for Conpherence Room titles, allowing a tokenizer for searching a subset of rooms.
Test Plan: Say `Gabbert` in two different rooms, search all, see two rooms returned. Search specific room, see specific result.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin
Maniphest Tasks: T3165
Differential Revision: https://secure.phabricator.com/D16692
Summary:
Ref T10747. Rough flow is:
- Run a query.
- Select a new "Export Events..." action.
- This lets you define an "Export", which has a unique URL you can paste into Google Calendar or Calendar.app or whatever.
Most of this does nothing yet but here's the boilerplate.
Test Plan: Doesn't do anything yet.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10747
Differential Revision: https://secure.phabricator.com/D16675
Summary:
Ref T10747.
- Store recurrence as RRULEs internally.
- Use RRULE constants.
- Migrate existing rules to RRULEs.
Test Plan: Ran migration, nothing seemed broken?
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10747
Differential Revision: https://secure.phabricator.com/D16670
Summary:
Ref T10747. This deprecates "dateFrom", "dateTo", "allDayDateFrom", "allDayDateTo", and "recurrenceEndDate".
They are replaced with "utc*Epoch" fields (for querying) and CalendarDateTime objects (for start, end, until). These objects can represent the full range of dates and times expressible in ICS format, allowing us to import a wider range of ICS events.
Test Plan:
Ran migrations, viewed/edited Calendar, didn't catch anything catastrophcially broken.
This likely needs some followups, I'll keep it local for a bit until I'm confident I didn't break anything too catastrophically. I'm retaining the old data for now so we can likely fix things if it turns out there is some sort of issue.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10747
Differential Revision: https://secure.phabricator.com/D16664
Summary:
Ref T10747. This does double-writes and starts generating/writing CalendarDateTimes.
This greater flexibility is necessary to support the full range of ICS-specifiable events, including "floating" events.
This doesn't do anything yet.
Test Plan: Created and edited events, verified sensible representations of corresponding datetimes appeared in the database.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10747
Differential Revision: https://secure.phabricator.com/D16661
Summary:
Ref T10747. Currently, Calendar events are mostly epoch-based and cheat a little bit for all-day events.
This already felt a little flimsy, and can't reasonably accommodate the full range of `.ics` events, which include "floating" events (e.g., occurs at 3PM regardless of timezone, like "Tea Time").
As a secondary issue, we identify instances of a recurring event by instance number (1, 2, 3, etc.). This can't accommodate the full range of `.ics` events, which include arbitrary additional "RDATE" events (e.g., recurrs every week, and also on these specific extra days).
However, we do need to store some epoch information so we can do query windowing: when the user looks at "October 2016", we want to select the smallest number of events that we can from the database initially, before refining them down to generate instances. We can't reasonably query the actual dates no matter how we store them because this depends on computing things like UNTIL, COUNT, initial dates, whether events are recurring or not, timezones, etc.
Instead, when we save an event compute the earliest second it occurs on in UTC and the latest second it occurs on in UTC. We can then query for a small superset of possible events in "October 2016" for any viewer pretty easily.
Also, start laying the groundwork for using fewer epochs in the rest of the code, and for reducing the role of sequence indexes (I plan to keep some sequences indexes around, probably, since they're nice in the UI, but not all child events will have indexes since there's no index for an RDATE event).
This doesn't migrate existing events yet or actually read these new columns -- that will come later once the new code is a little more solid.
Test Plan:
- Ran `bin/storage upgrade`.
- Created a new event.
- Saved an existing event.
- Viewed database, saw sensible-looking "UTC Epoch" values.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10747
Differential Revision: https://secure.phabricator.com/D16652
