Summary:
Depends on D18702. Ref T13008. This replaces the old hard-coded single rate limit with multiple flexible limits, and defines two types of limits:
- Rate: reject requests if a client has completed too many requests recently.
- Connection: reject requests if a client has too many more connections than disconnections recently.
The connection limit adds +1 to the score for each connection, then adds -1 for each disconnection. So the overall number is how many open connections they have, at least approximately.
Supporting multiple limits will let us do limiting by Hostname and by remote address (e.g., a specific IP can't exceed a low limit, and all requests to a hostname can't exceed a higher limit).
Configuring the new limits looks something like this:
```
PhabricatorStartup::addRateLimit(new PhabricatorClientRateLimit())
->setLimitKey('rate')
->setClientKey($_SERVER['REMOTE_ADDR'])
->setLimit(5);
PhabricatorStartup::addRateLimit(new PhabricatorClientConnectionLimit())
->setLimitKey('conn')
->setClientKey($_SERVER['REMOTE_ADDR'])
->setLimit(2);
```
Test Plan:
- Configured limits as above.
- Made a lot of requests, got cut off by the rate limit.
- Used `curl --limit-rate -F 'data=@the_letter_m.txt' ...` to upload files really slowly. Got cut off by the connection limit. With `enable_post_data_reading` off, this correctly killed the connections //before// the uploads finished.
- I'll send this stuff to `secure` before production to give it more of a chance.
Reviewers: amckinley
Reviewed By: amckinley
Maniphest Tasks: T13008
Differential Revision: https://secure.phabricator.com/D18703
Summary: Noticed a couple of typos in the docs, and then things got out of hand.
Test Plan:
- Stared at the words until my eyes watered and the letters began to swim on the screen.
- Consulted a dictionary.
Reviewers: #blessed_reviewers, epriestley
Reviewed By: #blessed_reviewers, epriestley
Subscribers: epriestley, yelirekim, PHID-OPKG-gm6ozazyms6q6i22gyam
Differential Revision: https://secure.phabricator.com/D18693
Summary: Adds a very basic list of all inline comments, threaded, and their status. Kept this a little simpler than the mock, mostly because sorting here feels a little strange given threads would be all over the place. Not sure sorted is needed in practice anyways. I'd probably lean towards just adding a JS checkbox to hide certain rows if needed in the future.
Test Plan:
Test various commenting structures:
- Leave Comment
- Update Diff
- Leave new comment
- Reply to comment
- Reply to comment as revision author
- Mark items as done
- Update diff again
{F4996915}
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin, epriestley
Differential Revision: https://secure.phabricator.com/D18112
Summary: We seem to already support this, just takes it fully there. We don't need to see things like "Flag", etc, on certain subpages of projects/people/etc.
Test Plan: Review Members, Subproject pages, no longer see "Flag for Later" which only is for the Project itself. Check manage, still there.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin
Differential Revision: https://secure.phabricator.com/D17897
Summary: Ref T12509. This encourages code to move away from HMAC+SHA1 by making the method name more obviously undesirable.
Test Plan: `grep`, browsed around.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T12509
Differential Revision: https://secure.phabricator.com/D17632
Summary: Ref T8628.
Test Plan: Performed an action that uses the redirect controller (trying to visit a repo page while not logged in). Logged in and was redirected as expected
Reviewers: #blessed_reviewers, epriestley
Reviewed By: #blessed_reviewers, epriestley
Subscribers: epriestley, yelirekim
Maniphest Tasks: T8628
Differential Revision: https://secure.phabricator.com/D16571
Summary: Getting rid of some code! This method has no callsites so it should be safe to remove completely. Ref T9690
Test Plan: Removed method and clicked around to make sure nothing broke.
Reviewers: #blessed_reviewers, epriestley
Reviewed By: #blessed_reviewers, epriestley
Subscribers: yelirekim, epriestley
Maniphest Tasks: T9690
Differential Revision: https://secure.phabricator.com/D16439
Summary:
Ref T11179. Alternative to D16152. I think this turned out a bit better than the other one did.
Currently, we render two copies of the menu (one for mobile, one for desktop). A big chunk of this is sharing the nodes instead: when you open the mobile dropdown menu, it steals the nodes from the document. When you close it, it puts them back. Magic! Sneaky!
Test Plan:
{F1695499}
{F1695500}
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T11179
Differential Revision: https://secure.phabricator.com/D16157
Summary:
Ref T11098. This primarily fixes Conduit calls to `*.edit` methods failing when trying to access user preferences.
(The actual access is a little weird, since it seems like we're building some UI stuff inside a policy query, but that's an issue for another time.)
To fix this, consolidate the "we're about to run some kind of request with this user" code and run it consistently for web, conduit, and SSH sessions.
Additionally, make sure we swap things to the user's translation.
Test Plan:
- Ran `maniphest.edit` via `arc call-conduit`, no more settings exception.
- Set translation to ALL CAPS, got all caps output from `ssh` and Conduit.
Reviewers: avivey, chad
Reviewed By: chad
Maniphest Tasks: T11098
Differential Revision: https://secure.phabricator.com/D16066
Summary:
Ref T4103. Currently, we issue a `SELECT * FROM user_preferences ... WHERE userPHID = ...` on every page to load the viewer's settings.
There are several other questionable data accesses on every page too, most of which could benefit from improved caching strategies (see T4103#178122).
This query will soon get more expensive, since it may need to load several objects (e.g., the user's settings and their "role profile" settings). Although we could put that data on the User and do both in one query, it's nicer to put it on the Preferences object ("This inherits from profile X") which means we need to do several queries.
Rather than paying a greater price, we can cheat this stuff into the existing query where we load the user's session by providing a user cache table and doing some JOIN magic. This lets us issue one query and try to get cache hits on a bunch of caches cheaply (well, we'll be in trouble at the MySQL JOIN limit of 61 tables, but have some headroom).
For now, just get it working:
- Add the table.
- Try to get user settings "for free" when we load the session.
- If we miss, fill user settings into the cache on-demand.
- We only use this in one place (DarkConsole) for now. I'll use it more widely in the next diff.
Test Plan:
- Loaded page as logged-in user.
- Loaded page as logged-out user.
- Examined session query to see cache joins.
- Changed settings, saw database cache fill.
- Toggled DarkConsole on and off.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T4103
Differential Revision: https://secure.phabricator.com/D16001
Summary: Moves over everything except Maniphest, which has some special behavior.
Test Plan:
- Viewed a badge.
- Viewed a calendar event.
- Viewed a countdown.
- Viewed a Fund initiative.
- Viewed a Herald rule.
- Viewed a macro.
- Viewed an application.
- Viewed an owners package.
- Viewed a credential.
- Viewed a Ponder question.
- Viewed a poll.
Reviewers: chad
Reviewed By: chad
Differential Revision: https://secure.phabricator.com/D15416
Summary:
This opens up the new action column to have specialized rendering and behavior. Briefly:
- Converted applications (right now, only Paste) render a `CurtainView` to build the column content.
- This view uses new extensions to build panels (projects, subscribers, tokens).
- The panel extension code and rendering can be changed without breaking old stuff.
Minor changes:
- Token awards now load their tokens, for consistency/simplicity.
- Removed the rest of the "fork of" / "forked from" UI in Paste -- I essentially removed these features a while ago, and no one has complained.
Test Plan:
UI is a bit rough, but works, and it's going to get changed now anyway:
{F1160550}
{F1160551}
Reviewers: chad
Reviewed By: chad
Differential Revision: https://secure.phabricator.com/D15414
Summary: Mostly for consistency, we're not using other forms of icons and this makes all classes that use an icon call it in the same way.
Test Plan: tested uiexamples, lots of other random pages.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin
Differential Revision: https://secure.phabricator.com/D15125
Summary: Removes all calls to addExtraQuicksandConfig Ref T9690
Test Plan: grep for addExtraQuicksandConfig, view a Pholio Page with and without chatbar, edit a pholio mock, save mock.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin
Maniphest Tasks: T9690
Differential Revision: https://secure.phabricator.com/D14622
Summary:
Ref T9690. The "meta viewport" tag got dropped by accident because of the sort of weird logic on the old flow.
Make the default device-ready, then just turn it off for the tiny number of non-device pages.
Test Plan:
- Verified meta viewport tag appears on normal pages again.
- Verified it doesn't show up on non-mobile pages like Maniphest Reports.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T9690
Differential Revision: https://secure.phabricator.com/D14396
Summary:
Ref T9132. Ref T4768. This is a rough v0 of ApplicationEditor, which replaces the edit workflow in Paste.
This mostly looks and works like ApplicationSearch, and is heavily modeled on it.
Roughly, we define a set of editable fields and the ApplicationEditor stuff builds everything else.
This has no functional changes, except:
- I removed "Fork Paste" since I don't think it's particularly useful now that pastes are editable. We could restore it if users miss it.
- Subscribers are now editable.
- Form field order is a little goofy (this will be fixed in a future diff).
- Subscribers and projects are now race-resistant.
The race-resistance works like this: instead of submitting just the new value ("subscribers=apple, dog") and doing a set operation ("set subscribers = apple, dog"), we submit the old and new values ("original=apple" + "new=apple, dog") then apply the user's changes as an add + remove ("add=dog", "remove=<none>"). This means that two users who do "Edit Paste" at around the same time and each add or remove a couple of subscribers won't overwrite each other, unless they actually add or remove the exact same subscribers (in which case their edits legitimately conflict). Previously, the last user to save would win, and whatever was in their field would overwrite the prior state, potentially losing the first user's edits.
Test Plan:
- Created pastes.
- Created pastes via API.
- Edited pastes.
- Edited every field.
- Opened a paste in two windows and did project/subscriber edits in each, saved in arbitrary order, had edits respected.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T4768, T9132
Differential Revision: https://secure.phabricator.com/D14390
Summary:
Fixes T5752. This obsoletes a bunch of old patterns and I'll follow up on those with a big "go do a bunch of mechanical code changes" task. Major goals are:
- Don't load named queries multiple times on search pages.
- Don't require extra code to get standard navigation right on mobile.
- Reduce the amount of boilerplate in ListControllers.
- Reduce the amount of boilerplate around navigation/menus in all controllers.
Specifically, here's what this does:
- The StandardPage is now a smarter/more structured object with `setNavigation()` and `setCrumbs()` methods. More rendering decisions are delayed until the last possible moment.
- It uses this to automatically add crumb actions to the application menu.
- It uses this to automatically reuse one SearchEngine instead of running queries multiple times.
- The new preferred way to build responses is `$this->newPage()` (like `$this->newDialog()`), which has structured methods for adding stuff (`setTitle()`, etc).
- SearchEngine exposes a new convenience method so you don't have to do all the controller delegation stuff.
- Building menus is generally simpler.
Test Plan:
- Tested paste list, view, edit, comment, raw controllers for functionality, mobile menu, crumbs, navigation menu.
- Edited saved queries.
- Tested Differential, Maniphest (no changes).
- Verified the paste pages don't run any duplicate NamedQuery queries.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T5752
Differential Revision: https://secure.phabricator.com/D14382
Summary:
This implements `PHUIDocumentViewPro` which should move to be the base for all documents (Phame, Phriction, Legalpad, Diviner). Overall this feels really good to me, but I'd like to roll it out into Diviner specifically first to work through the issues and then move into other apps and drop `PHUIDocumentView` once everything is converted. Some features are:
- White Background, no border on page
- Table of Contents is move to hidden menu (more space for documentation)
- Property List sits under the document
Some design decisions above are in anticipation of Phriction v3 and Unbeta Phame, specifically commenting and maybe some cool new Remarkup text layout options for Phame.
Test Plan:
Went through tons of pages on Diviner on Desktop, Tablet, Mobile. Bounce back to Phriction to make sure DocumentView CSS changes actually look better there.
{F930518}
{F930519}
{F930520}
{F930521}
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: tycho.tatitscheff, joshuaspence, Korvin
Differential Revision: https://secure.phabricator.com/D14374
Summary:
Ref T1806. Ref T5752. Currently, `handleRequest()` needs to return an `AphrontResponse`, but sometimes it's really convenient to return some other object, like a Dialog, and let that convert into a response elsewhere.
Formalize this and clean up some of the existing hacks for it so there's less custom/magical code in Phabricator-specific classes and more general code in Aphront classes.
More broadly, I want to clean up T5752 before pursuing T9132, since I'm generally happy with how `SearchEngine` works except for how it interacts with side navs / application menus. I want to fix that first so a new Editor (which will have a lot in common with SearchEngine in terms of how controllers interact with it) doesn't make the problem twice as bad.
Test Plan:
- Loaded a bunch of normal pages.
- Loaded dialogs.
- Loaded proxy responses (submitted empty comments in Maniphest).
Reviewers: chad
Reviewed By: chad
Subscribers: joshuaspence
Maniphest Tasks: T1806, T5752
Differential Revision: https://secure.phabricator.com/D14032
Summary:
Ref T8449. If a user doesn't have access to any spaces, most applications just don't work, and they fail in confusing ways.
Just lock users out of everything explicitly up front with a clear message instead of letting them stumble into a big broken mess.
Test Plan: Locked a user out of all spaces, saw error to that effect.
Reviewers: btrahan, eadler
Reviewed By: eadler
Subscribers: eadler, epriestley
Maniphest Tasks: T8449
Differential Revision: https://secure.phabricator.com/D13545
Summary: Ref T6367.
Test Plan:
- Added and executed unit tests.
- Sent mail to A (en_US) and B (en_A*).
- Got one mail in English and one mail in ENGLISH.
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T6367
Differential Revision: https://secure.phabricator.com/D13142
Summary: Fixes T7913. Collapse the separate board dropdown into the board projects behavior; we always need that anyway and now we can install the listener more granularly.
Test Plan:
- visted project board
- invoked create task, cancelled dialog
- visited project feed
- visited project board
- invoked create task, cancelled dialog (FAILED pre patch...!)
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin, epriestley
Maniphest Tasks: T7913
Differential Revision: https://secure.phabricator.com/D12599
Summary: Fixes T7685. This required making the global drag and drop behavior able to "uninstall" itself so to speak, and then it re-installs it self as necessary.
Test Plan:
Did the following all successfully
- uploaded a file to homepage
- homepage -> differential -- no way to upload via drag and drop
- homepage -> differential -> homepage -- uploaded a file
- homepage -> differential -> browser back button to homepage -- uploaded a file
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin, epriestley
Maniphest Tasks: T7685
Differential Revision: https://secure.phabricator.com/D12534
Summary: Ref T7803. Remove these in favor of more generalized paging and ordering.
Test Plan: Sorted and paged results in various applications.
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T7803
Differential Revision: https://secure.phabricator.com/D12378
Summary: Fixes T7689. I'm not going to go clean up all the rest of the `loadViewerHandles()` calls right now since a lot of them are kind of a pain and they aren't really hurting anything so it doesn't feel very leveraged, but at least deprecate it and document the new hotness.
Test Plan:
have a look
in a book
reading rainbow
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T7689
Differential Revision: https://secure.phabricator.com/D12343
Summary: These arrays looks a little odd, most likely due to the autofix applied by `ArcanistXHPASTLinter::LINT_ARRAY_SEPARATOR`. See D12296 in which I attempt to improve the autocorrection from this linter rule.
Test Plan: N/A
Reviewers: epriestley, #blessed_reviewers
Reviewed By: epriestley, #blessed_reviewers
Subscribers: epriestley
Differential Revision: https://secure.phabricator.com/D12281
Summary: Ref T7061. Quicksand still needs an ajax-style response here.
Test Plan: Clicked a file detail page (this redirects) with column open, ended up in the right place.
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T7061
Differential Revision: https://secure.phabricator.com/D12206
Summary: Fixes T7159.
Test Plan:
Created a legalpad document that needed a signature and I was required to sign it no matter what page I hit. Signed it and things worked! Added a new legalpad document and I had to sign again!
Ran unit tests and they passed!
Logged out as a user who was roadblocked into signing a bunch of stuff and it worked!
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin, epriestley
Maniphest Tasks: T7159
Differential Revision: https://secure.phabricator.com/D11759
Summary:
Ref T7152. Ref T1139. This updates Phabricator so third-party libraries can translate their own stuff. Also:
- Hide "All Caps" when not in development mode, since some users have found this a little confusing.
- With other changes, adds a "Raw Strings" mode (development mode only).
- Add an example silly translation to make sure the serious business flag works.
- Add a basic British English translation.
- Simplify handling of translation overrides.
Test Plan:
- Flipped serious business / development on and off and saw silly/development translations drop off.
- Switched to "All Caps" and saw all caps.
- Switched to Very English, Wow!
- Switched to British english and saw "colour".
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T7152, T1139
Differential Revision: https://secure.phabricator.com/D11747
Summary:
Ref T2086. Ref T7014. With the persistent column, there is significant value in retaining chrome state through navigation events, because the user may have a lot of state in the chat window (scroll position, text selection, room juggling, partially entered text, etc). We can do this by capturing navigation events and faking them with Javascript.
(This can also improve performance, albeit slightly, and I believe there are better approaches to tackle performance any problems which exist with the chrome in many cases).
At Facebook, this system was "Photostream" in photos and then "Quickling" in general, and the technical cost of the system was //staggering//. I am loathe to pursue it again. However:
- Browsers are less junky now, and we target a smaller set of browsers. A large part of the technical cost of Quickling was the high complexity of emulating nagivation events in IE, where we needed to navigate a hidden iframe to make history entries. All desktop browsers which we might want to use this system on support the History API (although this prototype does not yet implement it).
- Javelin and Phabricator's architecture are much cleaner than Facebook's was. A large part of the technical cost of Quickling was inconsistency, inlined `onclick` handlers, and general lack of coordination and abstraction. We will have //some// of this, but "correctly written" behaviors are mostly immune to it by design, and many of Javelin's architectural decisions were influenced by desire to avoid issues we encountered building this stuff for Facebook.
- Some of the primitives which Quickling required (like loading resources over Ajax) have existed in a stable state in our codebase for a year or more, and adoption of these primitives was trivial and uneventful (vs a huge production at Facebook).
- My hubris is bolstered by recent success with WebSockets and JX.Scrollbar, both of which I would have assessed as infeasibly complex to develop in this project a few years ago.
To these points, the developer cost to prototype Photostream was several weeks; the developer cost to prototype this was a bit less than an hour. It is plausible to me that implementing and maintaining this system really will be hundreds of times less complex than it was at Facebook.
Test Plan:
My plan for this and D11497 is:
- Get them in master.
- Some secret key / relatively-hidden preference activates the column.
- Quicksand activates //only// when the column is open.
- We can use column + quicksand for a long period of time (i.e., over the course of Conpherence v2 development) and hammer out the long tail of issues.
- When it derps up, you just hide the column and you're good to go.
Reviewers: btrahan, chad
Reviewed By: chad
Subscribers: epriestley
Maniphest Tasks: T2086, T7014
Differential Revision: https://secure.phabricator.com/D11507
Summary: Ref T6822. This method needs to be `public` because it is called from `PhabricatorApplicationSearchController::buildApplicationMenu()`.
Test Plan: I wouldn't expect //increasing// method visibility to break anything.
Reviewers: #blessed_reviewers, epriestley
Reviewed By: #blessed_reviewers, epriestley
Subscribers: Korvin, epriestley
Maniphest Tasks: T6822
Differential Revision: https://secure.phabricator.com/D11416
Summary: Fixes T6731. I don't really understand the intent behind the two view classes here, but to get this to work I need to pass yet more data to the lower-level class.
Test Plan: Viewed a task with many comments. Clicked "show older". Quoted everything I could. Verified for each quote that it quoted correctly, inlcuding linking to the prior transaction.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin, epriestley
Maniphest Tasks: T6731
Differential Revision: https://secure.phabricator.com/D10973
Summary: Fixes T6693.
Test Plan:
Made a bunch of comments on a diff with differential, being sure to leave inlines here and there. This reproduced the issue in T6693. With this patch this issue no longer reproduces!
Successfully "showed older changes" in Maniphest too.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin, epriestley
Maniphest Tasks: T6693
Differential Revision: https://secure.phabricator.com/D10931
Summary: Ref T4712. This adds pagination. Future diffs will need to deploy `buildTransactionTimeline` everywhere and massage this stuff as necessary if we hit any special cases.
Test Plan: Set page size to "5" to make it need to paginate often. Verified proper transactions loaded in and the javascript actions worked.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin, epriestley
Maniphest Tasks: T4712
Differential Revision: https://secure.phabricator.com/D10887
Summary:
Ref T6238. I'm building the instance management application now, but not putting it in the upstream -- I think the only use case for it is to build SAAS. If someone comes up with a use case (maybe a college course that wants to create an instance per-class or something?) we could open it up eventually, but it seems cleaner to keep it out of the upstream until we have such a use case.
I need to add schema patches. Make it easier for a subclass to just "add all the patches in this directory", like "autopatches/" works.
Test Plan:
- Ran `bin/storage status`, saw all normal patches still valid.
- In some future diff, the instances application will use this to apply patches.
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T6238
Differential Revision: https://secure.phabricator.com/D10848
Summary: ...way way down in PhabricatorController. Use it on ManiphestTaskDetailController to test it. Ref T4712. I think the pager logic to be added as part of T4712 can safely reside entirely within this method. As I said earlier, 5 parameters is a lot, so I don't really want to add more. Next diff would do the pagination logic and the diff after that would deploy it everywhere. If while deploying it everywhere I find something off, that will be a different diff.
Test Plan: viewed maniphest tasks and they looked as spiffy as ever.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin, epriestley
Maniphest Tasks: T4712
Differential Revision: https://secure.phabricator.com/D10844
Summary:
Ref T5702. This is a forward-looking change which provides some very broad API improvements but does not implement them. In particular:
- Controllers no longer require `$request` to construct. This is mostly for T5702, directly, but simplifies things in general. Instead, we call `setRequest()` before using a controller. Only a small number of sites activate controllers, so this is less code overall, and more consistent with most constructors not having any parameters or effects.
- `$request` now offers `getURIData($key, ...)`. This is an alternate way of accessing `$data` which is currently only available on `willProcessRequest(array $data)`. Almost all controllers which implement this method do so in order to read one or two things out of the URI data. Instead, let them just read this data directly when processing the request.
- Introduce `handleRequest(AphrontRequest $request)` and deprecate (very softly) `processRequest()`. The majority of `processRequest()` calls begin `$request = $this->getRequest()`, which is avoided with the more practical signature.
- Provide `getViewer()` on `$request`, and a convenience `getViewer()` on `$controller`. This fixes `$viewer = $request->getUser();` into `$viewer = $request->getViewer();`, and converts the `$request + $viewer` two-liner into a single `$this->getViewer()`.
Test Plan:
- Browsed around in general.
- Hit special controllers (redirect, 404).
- Hit AuditList controller (uses new style).
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T5702
Differential Revision: https://secure.phabricator.com/D10698
Summary:
Ref T2787. Currently, we kill a cart and dead-end the workflow on a charge failure.
Instead, fail the charge and reset the cart so the user can try using a valid payment instrument like a normal checkout workflow would.
Some shakiness/smoothing on WePay for the moment; PayPal is still made up since we don't have a "Hold" state yet.
Test Plan: {F215214}
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T2787
Differential Revision: https://secure.phabricator.com/D10666
