Like the FETCH_COMPLETE and ABANDON_END actions, the PREVIEW_SHOW action
was delayed but not conditionally reduced. As ABANDON_END is delayed,
there's a potential for a race and if ABANDON_END is reduced before
PREVIEW_SHOW, then there's no interaction to reduce the action into,
which causes an error, e.g. T159490#3165276 and T162373. Making
PREVIEW_SHOW require a token stops the error occurring in this scenario.
An alternative would be to clear the timeout created in
ext.popups.Preview#show in #hide. However, this would be inconsistent
with actions#fetch and actions#abandon.
Bug: T159490
Change-Id: Ibd2c0c6f45e4392582cc6ed08517f6ca1146d57a
Mirroring all other actions that are dispatched after some delay, add
the token to the PREVIEW_SHOW action.
Supporting changes:
* Pass the token to ext.popups.Preview#show so that it can be passed to
actions#previewShow.
Bug: T159490
Change-Id: I128fd56e770ed09d5d0dc55db73d11b013049c79
The ABANDON_START action test cases were (accidentally?) nested under
the FETCH_COMPLETE action test cases...
Bug: T162373
Change-Id: Ia7866178162512602dedd7f70d62c17995ee5076
... instead of using the active element.
In the case of the eventLogging reducer, this fixes scenario 4.1 from
T159490#3150331, which was caused by late FETCH_COMPLETE actions being
reduced regardless of whether interaction had been finalised or a new
interaction had started.
Bug: T159490
Change-Id: If9d718625b0302ea2f75a778005643b4eef62bde
Treat these responses not as an API failure. Show a generic
preview whenever the server responds with a 404.
Bug: T160744
Change-Id: Id6169d9d4c7493f5b6511cc78fe65d448cdadc03
I6d9ff52b introduced a regression where if a logged out user clicks the
settings cog then an error is thrown.
For now, passing the event to the behavior for further processing is
required. However, it's clear that this makes the
ext.Popups.PreviewBehavior abstraction leaky.
Bug: T162324
Change-Id: I9dea04eb7435f9349e60d477f5701ec5dd655ebd
We have to be careful about the namespaces here, and then we don't
need the awful `.html( .html() )` hack. (I honestly have no idea
why that even worked for some browsers, it really shouldn't have.
The comment next to it is wrong.)
* Construct the 'svg:svg' element with the right namespace
* Set 'xlink:href' attribute on 'svg:image' element with the right namespace
Doing this correctly makes the thumbnails work in Opera 12, and it also
works as before in (at least) Chromium 57, Firefox 53, IE 11 and Edge.
I can't find out what version of Safari the other hack here was
supposed to apply to, but the code was wrong in both cases, and the
hack was mistakenly also applied to modern Chromium.
Useful resources for dealing with SVG embedded in HTML while scripting:
* http://stackoverflow.com/questions/6701705/programmatically-creating-an-svg-image-element-with-javascript
* http://jsfiddle.net/UVFBj/8/
* https://www.w3.org/Graphics/SVG/WG/wiki/Href#xlink:href
Bug: T161799
Change-Id: I30b2a1291811296424018e013bd07055ae7551d7
Require that two promises are resolved (or one is rejected) before the
FETCH_COMPLETE action is dispatched. The first promise represents the
gateway request and the second represents an arbitrarily long delay. If
the first resolves before the second, then there'll be a delay until the
second resolves; whereas if the first rejects, then there's no delay.
Change-Id: I496fe317337745c593594efff26688c46d661bf3
The delay/timeout logic in actions#fetch will require more than one wait
call, for example.
Changes:
* Update the stub created in setupWait to store all deferred-promise
pairs and update the integration tests so that they don't use the stub
accidentally.
* Remove all references to the waitDeferred/waitPromise properties.
* Fix tests that relied on the waitDeferred/waitPromise properties being
available regardless of whether wait had been called.
* Update outdated or brittle - in the sense that it didn't reference
constants but their values - inline documentation.
Change-Id: I94345cdf4126b6c540d4fb8135a7a7e4d0507bed
Mixing in the delay was introduced in If3f1a06f so that the total RTT
for an API request could be calculated. Now that the FETCH_END action is
dispatched when the gateway request ends and not when the preview model
is resolved, this additional information (state) is redundant.
Change-Id: I7e6ffe0945ffedd9425525fa7da855e729d50b77
Ideally, the preview model is resolved after 500 ms, regardless of
whether the internal gateway takes 100 or 300 ms. Given this, there's an
important distinction to be made between the "fetch" ending and it
completing and their associated actions.
Changes:
* Dispatch the FETCH_COMPLETE action when the preview model is resolved.
* Update the reducers accordingly.
Change-Id: I62c9cb0430284b76338ea80bd170cac5af4be9d0
If the user has disabled PP via the settings dialog or they aren't in
the experimental condition, then link titles shouldn't be emptied.
Because this behavior has to respond to the user enabling/disabling PP
within the same page session, change the linkTitle change listener
rather than conditionally registering it.
Bug: T161277
Change-Id: I53c1a1d3e4436e2ffe08da27da388f394f4e8817
Binding the behavior to the preview before it's shown means that the
application will respond to user interactions with the preview even
though it's transparent.
This fixes scenario 4 from T159490.
Bug: T159490
Change-Id: Ia2d06869868d07af60bdeb49d46612a4a0dc02e9
If the user abandons link A (or preview A) and immediately dwells on
link B, then log a "dismissed" or "dwelledButAbandoned" event.
In this context, "immediately" means before the ABANDON_END action is
dispatched, which, currently, is 300 ms after the ABANDON_START action
is dispatched.
Bug: T159490
Change-Id: I49f0f5dfb3e6c08844f1794fee8cb6170e93981b
Reducer changes:
* Add tests for ABANDON_END case.
* Extract the body of the ABANDON_END case into the createAbandonEvent
helper function.
Additional changes:
* totalInteractionProperty -> totalInteractionTime elsewhere in the same
file.
Bug: T159490
Change-Id: Ifff34271395f330b83cfe487e84800fe2d6f3811
Reducer changes:
* Make the eventLogging reducer queue a "tapped settings cog" event when
reducing the SETTINGS_SHOW action.
This was discovered while testing I6ce7d72b.
Bug: T159490
Change-Id: I6ce7d72b364d20c71b0e2cfed98e99f7997895e5
Like dwelling and abandoning, clicking on a preview is the same as
clicking on a link.
This fixes scenario 3 from T159490.
Bug: T159490
Change-Id: I6d9ff52b62bec93ebfcc9b6d267a46cf961852fb
For now, mirror the interaction modelling in the preview reducer in the
eventLogging reducer to handle the user either:
* Repeatedly dwelling on and abandoning a link.
* (Repeatedly) moving their mouse between the link and the preview.
This fixes scenarios 1, 2, 5, and the general issue from T159490.
Bug: T159490
Change-Id: Ia771f325e541c107348b16b47c5b786c97847652
Step 1 of T161284. Given that the median API response time (as measured
by the client) is ~115 ms [0] and the API response is artificially
delayed so that the preview starts fading in at 500 ms, we can increase
the API request delay to 150 ms without affecting the current UX while
decreasing the number of incidental HTTP requests triggered by the user
glancing their mouse over a link to another page.
[0] https://grafana.wikimedia.org/dashboard/db/reading-web-page-previews
Bug: T161284
Change-Id: I4c4a766467cdb4cd47c4231c1106c35bab67855e
When EventLogging is unavailable do not initialise the EL-related code
or try to send any events.
When EL is enabled for a brand new user we request an additional module
during boot causing an additional HTTP request. Page Previews continues
to boot normally regardless of whether the request fails.
This approach doesn't impact boot or first paint time. Once the module
is loaded once it should be cached locally, subject to the
ResourceLoader's policy. Moreover, the RL will not attempt to load the
module twice so this doesn't impact the performance of other modules.
Bug: T158999
Change-Id: I7ed7f00d52279151ece23e5aced4f2adb0f7fdc3
