Commit Graph

411 Commits

Author SHA1 Message Date
Kenia 51db157fab ui: Redesign - Service Detail Page (#7655)
* Create ConsulServiceInstanceList with styling and test
* Implement ConsulServiceInstanceList to Service Detail page
* Implement ConsulExternalSource to Services Show page header
* Update services/show page object

* Update the styling of CompositeRow

* Refactor ConsulServiceList component and styling

* Update ConsulExternalSource to say 'Registered via...'

* Upgrade consul-api-double to patch 2.14.1

* Fix up tests to not use Kind in service models

* Update ListCollection with clickFirstAnchor action

* Add $typo-size-450 to typography base variables
2020-05-12 17:14:27 +00:00
John Cowen 8e9fca9be6 ui: Per Service Intentions Tab (#7615)
* Add model layer support for filtering intentions by service

* Add Route, Controller and template for services.show.intentions tab

We are still loading the intentions themselves in the parent Route for
the moment

* Load the intentions in in the parent route for the moment

* Temporarily add support for returning to history -1

Once we have an intention form underneath the service/intention tab this
will no longer be needed

* Add the new tab and enable blocking queries for it

* Add some further acceptance testing around intention listings
2020-05-12 17:14:26 +00:00
Kenia 288316432b ui: Redesign - Create ConsulExternalSource (#7632)
* Create ConsulExternalSource with test and styling

* Implement ConsulExternalSource to Service list page

* Update icons for redesign

* Refactor ListCollection and CompositeRow styling
2020-05-12 17:14:25 +00:00
Kenia f39671d568 ui: Redesign Service List page (#7605)
* Create GridCollection for nodes page with styling

* Update ListCollection styling

* Update TagList styling

* Create CompositeRow styling component

* Update ConsulServiceList component with styling

* Create service health-checks helper

* Add InstanceCount to the service model

* Add tag-svg to codebase

* Create and update tests for service-list page

* Upgrade @hashicorp/consul-api-double to 2.14.0
2020-05-12 17:14:25 +00:00
John Cowen 4bf1daef0a ui: Logout button (#7604)
* ui: Logout button

This commit adds an easier way to logout of the UI using a logout button

Notes:

- Added a Logout button to the main navigation when you are logged in,
meaning you have easy access to a way to log out of the UI.
- Changed all wording to use 'Log in/out' vocabulary instad of 'stop
using'.
- The logout button opens a panel to show you your current ACL
token and a logout button in order to logout.
- When using legacy ACLs we don't show the current ACL token as legacy
ACLs tokens only have secret values, whereas the new ACLs use a
non-secret ID plus a secret ID (that we don't show).
- We also added a new `<EmptyState />` component to use for all our
empty states. We currently only use this for the ACLs disabled screen to
provide more outgoing links to more readind material/documentation to
help you to understand and enable ACLs.
- The `<DataSink />` component is the sibling to our `<DataSource />`
component and whilst is much simpler (as it doesn't require polling
support), its tries to use the same code patterns for consistencies
sake.
- We had a fun problem with ember-data's `store.unloadAll` here, and in
the end went with `store.init` to empty the ember-data store instead due
to timing issues.
- We've tried to use already existing patterns in the Consul UI here
such as our preexisting `feedback` service, although these are likely to
change in the future. The thinking here is to add this feature with as
little change as possible.

Overall this is a precursor to a much larger piece of work centered on
auth in the UI. We figured this was a feature complete piece of work as
it is and thought it was worthwhile to PR as a feature on its own, which
also means the larger piece of work will be a smaller scoped PR also.
2020-05-12 17:14:24 +00:00
John Cowen 32a619ae99 ui: Add tab navigation to the browser history/URLs (#7592)
* ui: Add tab navigation to the browser history/URLs

This commit changes all our tabbed UI interfaces in the catalog to use
actual URL changes rather than only updating the content in the page
using CSS.

Originally we had decided not to add tab clicks into the browser
history for a variety of reasons. As the UI has progressed these tabs
are a fairly common pattern we are using and as the UI grows and
stabilizes around certain UX patterns we've decided to make these tabs
'URL changing'.

Pros:

- Deeplinking
- Potentially smaller Route files with a more concentrated scope of the
contents of a tab rather than the entire page.
- Tab clicks now go into your history meaning backwards and forwards
buttons take you through the tabs not just the pages.
- The majority of our partials are now fully fledged templates (Octane
🎉)

Cons:

- Tab clicks now go into your history meaning backwards and forwards
buttons take you through the tabs not just the pages. (Could be good and
bad from a UX perspective)
- Many more Route and Controller files (yet as mentioned above each of these
have a more reduced scope)
- Moving around the contents of these tabs, or changing the visual names
of them means updates to the URL structure, which then should
potentially entail redirects, therefore what things that seem like
straightforwards design reorganizations are now a little more impactful.

It was getting to the point that the Pros outweight the Cons

Apart from moving some files around we made a few more tiny tweaks to
get this all working:

- Our freetext-filter component now performs the initial search rather
than this happening in the Controller (remove of the search method in
the Controllers and the new didInsertElement hook in the component)
- All of the <TabNav>'s were changed to use its alternative href
approach.
- <TabPanel>s usage was mostly removed. This is th thing I dislike the
most. I think this needs removing, but I'd also like to remove the HTML
it creates. You'll see that every new page is wrappe din the HTML for
the old <TabPanel>, this is to continue to use the same HTML structure
and id's as before to avoid making further changes to any CSS that might
use this and being able to target things during testing. We could have
also removed these here, but it would have meant a much larger changeset
and can just as easily be done at a later date.
- We made a new `tabgroup` page-object component, which is almost
identical to the previous `radiogroup` one and injected that instead
where needed during testing.

* Make sure we pick up indexed routes when nspaces are enabled

* Move session invalidation to the child (session) route

* Revert back to not using didInsertElement for updating the searching

This adds a way for the searchable to remember the last search result
instead, which changes less and stick to the previous method of
searching.
2020-05-12 17:14:23 +00:00
John Cowen fb49d0473b ui: Changes our global LEARN link to start at root instead of /consul (#7573)
In case we ever need to link to anywhere on learn that isn't in the
`/consul` sub directory, this will let us do that whilst still using the
global env var.
2020-05-12 17:14:22 +00:00
John Cowen 5dad95faf1 ui: Add `<ConsulMetadataList />` and use it in 2 places (#7568)
We previoulsy had some pretty straightforward duplicated code for
rendering our metadata list for both Service Metadata and Node Metadata.

This moves this code into a component.
2020-05-12 17:14:21 +00:00
John Cowen c20cff9bf5 ui: Moves intentions listing and form into components (#7549)
Whilst we tried to do this with the smallest amount of changes possible,
our acceptance tests for trying to submit a blank form started failing
due to usage of `destroyRecord`, its seems that the correct way to
achieve the same thing is to use `rollbackAttributes` instead. We
changed that here and the tests pass once again. Furture work related to
this will involve change the rest of the UI where we use `destroyRecord`
to achieve the same thing, to use `rollbackAttributes` instead
2020-05-12 17:14:21 +00:00
John Cowen 80960c9d54 ui: Add `<State /> and `{{state-matches}}` ember component/helper (#7556)
This commit adds 2 ember component/helpers and a service to contain the
shared functionality for matching/rendering content dependent on state
identifiers. Currently a `service.state` method has been added to easily
make manual state objects, but these are built towards using `xstate` to
manage UI state in some of our future components.

We've added some tests here, and we aren't currently using these
components anywhere in this commit.
2020-05-12 17:14:20 +00:00
John Cowen 0afb8a1074 ui: Exposes the <ToggleButton /> 'click' action (#7479)
This exposes an api for <ToggleButton /> so you can call it from
elsewhere, specifically here we use the api.click to close the dropdown
menus which is required is the DOM containing the toggle button isn't
redrawn as is the case with external links in a dropdown menu
2020-05-12 17:14:19 +00:00
John Cowen 2413244b77 ui: Add DataSource component (#7448)
* ui: Add data-source component and related services (#6486)

* ui: Add data-source component and related services:

1. DataSource component
2. Repository manager for retrieving repositories based on URIs
3. Blocking data service for injection to the data-source component to
support blocking query types of data sources
4. 'Once' promise based data service for injection for potential
fallback to old style promise based data (would need to be injected via
an initial runtime variable)
5. Several utility functions taken from elsewhere
  - maybeCall - a replication of code from elsewhere for condition
  calling a function based on the result of a promise
  - restartWhenAvailable - used for restarting blocking queries when a
  tab is brought to the front
  - ifNotBlocking - to check if blocking is NOT enabled

* Move to a different organization based on protocols

* Don't call open twice when eager

* Workaround new ember error for reading and writing at the same time

* Add first draft of a README.mdx file
2020-05-12 17:14:18 +00:00
John Cowen 6f32981c76 ui: Adds blueprint for creating css-components (#7460)
* ui: Adds blueprint for creating css-components

CSS Components are CSS only components, which can be one of 2 types:

1. A composable CSS component that is not commonly used on its own
2. A CSS component that is commonly used along with a HTML/JS component,
potentially made up of other composable CSS components.

For type 1. you probably don't need the ./styles/component-name.scss
file. But instead of complicating matters with options for the blueprint
right now, we just rely on the user to delete the
./styles/component-name.scss file if they don't need it.

We also don't automatically add this import to the
./styles/components/index.scss file for 2 reasons:

1. We are potentially going to be moving the
./styles/components/index.scss file to ./styles/components.scss.
2. If we aren't going to provide a CLI swicth to ask whether this is of
component type 1. or component type 2. we don't want to automatically
include things that the user might not need.

Both of these 2 reasons are a little TBD and at some point in the future
we'll probably iterate on this blueprint to make it even easier to make
either type of CSS component.
2020-05-12 17:14:17 +00:00
John Cowen 64b07dcafe ui: Move <Ref /> docs to README.mdx (#7459)
README.mdx file are auto displayed in GH. Also added note on it being
renderless, which is useful to know from a CSS standpoint
2020-05-12 17:14:17 +00:00
John Cowen 5e98ef3f51 ui: Add Ref component (#7442)
* ui: Add Ref component
2020-05-12 17:14:16 +00:00
John Cowen 8986b6ad7b ui: Move to new ember nested file structure for components (#7403)
* ui: Move components to the new nested structure

* Move data-test attribute to the correct HTML element

We don't currently rely on this, but was incorrectly placed on the input
rather than the label tag

* Fix up left over curly bracket components that were causing issues

For some reason the combination of:

1. Old style curly bracket components
2. data-test-* attributes
3. Moving to the new component file structure

Meant that our data-test-* selectors where no longer being rendered.
Whilst this had no effect on the app, it meant our tests suite could no
longer select DOM elements in order to assert various things.

Moving the old style curly bracket components to the new style XML/Angle
bracket format fixes the issue

* Update ui-v2/app/templates/dc/nodes/-services.hbs

Co-Authored-By: Greg Hoin <1416421+gregone@users.noreply.github.com>

* Update ui-v2/app/templates/dc/nodes/-services.hbs

Co-Authored-By: Greg Hoin <1416421+gregone@users.noreply.github.com>

Co-authored-by: Greg Hoin <1416421+gregone@users.noreply.github.com>
2020-05-12 17:14:15 +00:00
Kenia 69598b6803 ui: Update the shadows for radio buttons and the cards (#7391)
* Update box-shadowing for cards and radio buttons to low
* Update box-shadowing for hover cards to middle
* Create a new box-shadow CSS variable for form elements
2020-05-12 17:14:14 +00:00
John Cowen 2ad0f652e7 ui: Install ref modifier and use it instead of dom selecting (#7383) 2020-05-12 17:14:14 +00:00
John Cowen bda515abe9 ui: Remove settings.findHeaders now we can use promises in our adapters (#7375)
Previously the API around setting headers wasn't within a Promised like
code path, so we needed a little 'cheat' function to get a token from
localStorage syncronously.

Since we refactored our adapter layer, we now have a Promised codepath
where we need to access this localStorage value and set our headers.
This means we can remove our little 'cheat' function.
2020-05-12 17:14:13 +00:00
Kenia f0ce300204 ui: Delete the Promise rsvp imports from codebase (#7372) 2020-05-12 17:14:12 +00:00
John Cowen 27e8276e81 ui: Updates Consul blueprints to be compatible with new ED version (#7370) 2020-05-12 17:14:11 +00:00
John Cowen a8de3f3081 ui: Split out product css component into its separate elements (#7342)
* Remove old %action-group

* Remove old variables we no longer need

* Use the discovery-chain component in the same manner as others

* Split `product` out into its separate components
2020-05-12 17:14:11 +00:00
John Cowen 2f28232df0 ui: Upgrade to ember 3.16 Octane Edition (#7334)
* v3.12.0...v3.16.0

* Upgrades

* Remove old wormhole fix

* Fixup ember power select (camelcasing)

* Fixup immedaitely closing dropdown

When clicking on the syntax selector, it seemed like an extra click
event was firing from the label, which then immediately closed the
dropdown. By adding a for="" attribute this event isn't passed to the
dropdown menu and therefore doesn't immediately close

* Fix up integration tests with new style (plus standardize titles)

* Temporarily disable some template linting rules

* Add required methods (even though they aren't used anywhere)

* Ensure event sources get closed on destruction
2020-05-12 17:14:10 +00:00
Kenia 397757ae62 ui: Create CSS variables for box-shadowing consistency (#7337)
* Table - Lowest (on-hover of table items)
* Buttons - Middle
* Form-elements - Removed, no box-shadowing in input forms mocks.
* Menu-panel -High
* Modal-dialog - Highest
* Stats-card -Middle/High(Active)
* Tooltip - Middle
* Card - Middle
* Expanded-single-select - Middle
* Tabular-details - High
* Discovery chain - High
2020-05-12 17:14:09 +00:00
John Cowen 64ff304585 ui: Make a specific CI coverage make target ensuring use of CI cache (#7335) 2020-05-12 17:14:08 +00:00
Kenia 191496e4a5 ui: Create a helper to show the last 8 characters of token Accessor ID (#7327)
* Create substr helper
* Create a test for the new substr helper
* Display the last 8 characters of token Accessor ID in the Token lists page
2020-05-12 17:14:07 +00:00
Kenia 95031f9f90 ui: Add box-shadow to table items on hover 2020-05-12 17:14:06 +00:00
John Cowen aea3d00a9d ui: Move to angle brackets for ember components (#7321)
* Modify templates with codemods angle brackets

* ui: Fix up problem with intention filter action attribute

Co-authored-by: Kenia <19161242+kaxcode@users.noreply.github.com>
2020-05-12 17:14:05 +00:00
John Cowen 4be566e545 ui: Upgrade ember-cli-api-double (#7322)
* ui: Upgrade ember-cli-api-double
2020-05-12 17:14:04 +00:00
John Cowen 8e5cb78c1c ui: Add new Help menu with links to docs, learn and GH (#7310) 2020-05-12 17:14:03 +00:00
John Cowen f306c753e2 ui: HTTP Body testing (#7290)
* ui: Test Coverage Reporting (#7027)

* Serve up the /coverage folder whilst developing

* Upgrade ember-cli-api-double now it supports passthrough per url

* ui: make env into a service and use it where we need to be injectable

* Give http/client a body method so we can use it on its own for testing

* Add test helper for testing with and without nspaces enabled

* Add two tests, one thay needs nspaces and one that doesn't

* Keep cleaning up client/http, whilst figuring out a immutable bug

* Convert tests to new return format ([actual, leftovers])
2020-05-12 17:14:02 +00:00
John Cowen f9bd3a0b93 ui: Use a service-proxy to test service removal notification (#7315) 2020-05-12 17:14:01 +00:00
John Cowen 59e8261936 ui: Upgrade ember-cli-api-double and ember-data to fix up stage/preview site (#7316) 2020-05-12 17:14:00 +00:00
John Cowen 1a7a1fb4f1 Upgrade to use structure-icons 1.8 (plus additional mask placeholders) (#7287) 2020-05-12 17:13:58 +00:00
John Cowen e9ed49d9aa ui: Test coverage developer experience (#7275)
* ui: Add getSplitters unit test and additional getResolvers test

* Make ordering of makefile target consistent
2020-05-12 17:13:57 +00:00
John Cowen 771973a713 ui: Add consul-service-list presentational component (#7279)
This commit moves our service list into a new presentational component,
and is therefore mainly just moving things around. The main thing moved
here is the logic required to resizing columns correctly is now moved to
a component instead of the controller
2020-05-12 17:13:56 +00:00
John Cowen 7dc5201676 ui: Remove `next` from usage from discovery-chain component (#7273)
In a previous iteration of discovery-chain wrapping some event listeners
in a call to `next` (i.e. do this on next tick) was necessary. We added
a comment in here to see if we could get rid of it at a later date.

We've taken another look at this and it looks like this `next` is no
longer required in this later iteration. Further more there is the
tiniest chance that possibly, as we are adding listeners on next tick, that the
listeners could be added after component destruction, which means when
you click on the page we try to set a property of a destroyed object and
boom.

Removing this `next` removes this tiny possibility.
2020-05-12 17:13:55 +00:00
John Cowen b6915793d0 ui: Remove custom css-vars 'polyfill' and use native CSS props (#7249)
* ui: Remove custom css-vars 'polyfill' and use native CSS props

Previously we used a sort of polyfill for certain places where we needed
CSS property-like behavior. This meant duplicating code between JS and
CSS, specifically some of our SVG icons.

We moved to CSS props only in the places where they are beneficial and
populated the variables with our already existing SASS variables.

This means we no longer have to duplicate CSS and we can remove our
custom css-var helper/polyfill.
2020-05-12 17:13:54 +00:00
John Cowen 662c28307c ui: Upgrade to node 12 LTS (#7248)
Upgrading our build tooling to use the latest node LTS and the lastest/current
Alpine version in our container
2020-05-12 17:13:53 +00:00
Alvin Huang 48a52e07da fix ember parallelization (#7221) 2020-05-12 17:13:52 +00:00
John Cowen ab8d318181 ui: Use the dart-sass implementation of sass (#7175) 2020-05-12 17:13:51 +00:00
John Cowen 79156324bf ui: Test Coverage Reporting (#7027)
* Serve up the /coverage folder whilst developing

* Upgrade ember-cli-api-double now it supports passthrough per url
2020-05-12 17:13:50 +00:00
John Cowen 7bca634087 ui: Slight refactor 'name deciding' for `request` > `rpc` (#6850)
During the refactor of the data layer we had a method that you can use
to do a request/response call i.e. adapter.request > serializer.respond

We weren't sure what to name this but eventually wanted it to live on
the HTTPAdapter itself (see removed comments in the changeset)

We've decided `rpc` is a good name and we've moved this to where we want
it. We've deprecated the old `request` method name but not removed it as
yet. There's also opportunity now to reduce the 'read/write' functions
further as they essentially do the same thing. Again we've left this for
the moment, but we are hoping to get the code for our custom Adapter down
to less than 100 LoC.
2020-05-12 17:13:50 +00:00
John Cowen 604de8758b
ui: Fix using 'ui-like' KVs when using an empty default nspace (#7734)
When using namespaces, the 'default' namespace is a little special in
that we wanted the option for all our URLs to stay the same when using
namespaces if you are using the default namespace, with the option of
also being able to explicitly specify `~default` as a namespace.

In other words both `ui/services/service-name` and
`ui/~default/services/service-name` show the same thing.

This means that if you switch between OSS and Enterprise, all of your
URLs stay the same, but you can still specifically link to the default
namespace itself.

Our routing configuration is duplicated in order to achieve this:

```
- :dc
  - :service
  - :kv
    - :edit
- :nspace
  - :dc
    - :service
    - :kv
      - :edit
```

Secondly, ember routing resolves/matches routes in the order that you specify
them, unless, its seems, when using wildcard routes, like we do in the
KV area.

When not using the wildcard routes the above routing configuration
resolves/matches a `/dc-1/kv/service` to the `dc.kv.edit` route correctly
(dc:dc-1, kv:services), that route having been configured in a higher
priority than the nspace routes.

However when configured with wildcards (required in the KV area), note
the asterisk below:

```
- :dc
    :service
  - :kv
    - *edit
- :nspace
  - :dc
    - :service
    - :kv
      - *edit
```

Given something like `/dc-1/kv/services` the router instead matches the
`nspace.dc.service` (nspace:dc-1, dc:kv, service:services) route first even
though the `dc.kv.edit` route should still match first.
Changing the `dc.kv.edit` route back to use a non-wildcard route
(:edit instead of *edit), returns the router to match the routes in the
correct order.

In order to work around this, we catch any incorrectly matched routes
(those being directed to the nspace Route but not having a `~`
character in the nspace parameter), and then recalculate the correct
route name and parameters. Lastly we use this recalculated route to
direct the user/app to the correct route.

This route recalcation requires walking up the route to gather up all of
the required route parameters, and although this feels like something
that could already exist in ember, it doesn't seem to. We had already
done a lot of this work a while ago when implementing our `href-mut`
helper. This commit therefore repurposes that work slighlty and externalizes
it outside of the helper itself into a more usable util so we can import
it where we need it. Tests have been added before refactoring it down
to make the code easier to follow.
2020-04-30 09:28:20 +01:00
John Cowen 04a8a77365
ui: Lazily detect HTTP protocol (#7644)
This commit includes 2 things:

1. Sometimes (seemingly due to client caching), performance entries
aren't available, even for the currently executing script. This waits
until the first retrieval of 'CONSUL_HTTP_PROTOCOL' before using the
performance entries to decide this. This means that the entries aren't
inspected until ember has initialized, which means that the entries are
always available.

2. getCurrentResource/getResourceFor could potentially return undefined
if the correct entry could not be found. This adds a default {} return
value if the resource cannot be found. This means that if for whatever
reason the correct resource cannot be found at least we don't fail with
an error and just drop back to HTTP/1 functionality.
2020-04-15 14:42:55 +01:00
John Cowen 8d4631526c
ui: Fix token duplication bug (#7552)
We need to detect whether an object is an ember-data snapshot or just a
plain object, and we where restricted from using `instanceof` due to
ember-data's `Snapshot` class being private.

We'd chosen to go with `constructor.name` instead, which seemed to work,
but when the javascript gets minifed the name of the contructor is also
minified and therefore is not what you are expecting.

This commit reverts to our original idea of checking for the existence
and type of the `.attributes` function, which is the function we require
within the conditional, and therefore is more reliable (if the function
doesn't exist it will error out during development aswell as production)
2020-04-01 09:55:20 +01:00
John Cowen 6ffe0e6fe4
ui: Use the `each key=""` parameter to force ember to reuse DOM (#7550)
Ember tries to reuse DOM elements when it can but as ember looks for
changes to objects rather than the DOM itself sometimes. This and the
fact that an objects identity may change even though its value hasn't,
results in ember occasionally re-mutating DOM when it doesn't need to.

The `each` helper includes a `key` attribute to hint to ember what it
should look for when deciding whether something has changed, rather than
the objects identity.

https://api.emberjs.com/ember/release/classes/Ember.Templates.helpers/methods/each#specifying-keys

We use this here to fix an issue where DOM was being redrawn after the
user had scrolled the page and was therefore resetting the scroll back
to 0 (the top of the page)
2020-03-31 14:58:59 +01:00
John Cowen 31b9b90bc3
ui: Ensure blocking query configuration is passed through to findInstanceBySlug (#7543)
* ui: Ensure configuration is passed through to findInstanceBySlug

Due to the addition of namespace support, this arguments passed to this
method have been increased. Whilst the nspace support continues ot work
here, the configuration for blocking queries is never passed through.
This results in a 2 second poll rather than a blocking query.

This commit fixes that

* ui: Add a basic test to check the number of arguments passed through
2020-03-30 15:23:06 +01:00
John Cowen 5f625666b4
ui: Enable recovery from an unreachable datacenter (500 error) (#7404)
For URL maintenance reasons we store the last visited DC in
localStorage incase you come back to a page (for example settings) that
doesn't have a dc in the URL.

A problem arises here if the last DC you tried to visit is unreachable.

The first fix here clears out the last visited DC from localStorage if
the API has errored out.

Secondly, our `href-mut` helper which mutates the current current and
replaces 'parts' in the URL rather than the whole thing functioned by
detecting the current route/URL you are on an 'mutating' that. A problem
arose here as even though you might be on the `/ui/dc-1/services` URL the
actual route is the 'error' route which does not have a URL that can be
changed properly.

The second fix here uses route.currentRoute.name over route.currentRouteName.

The latter is equal to error when an error occurs whereas the former gives you the name of the route before the error happened, which is actually what we want/the intent here.

ie. when `router.currentRouteName === 'error'` then
`router.currentRoute.name === Name Of Route Before It Errored` it seems
2020-03-09 09:10:47 +00:00
John Cowen 6074a1b4c8
ui: Coordinates don't require a nspace, so don't expect one in the repo (#7378)
* ui: Coordinates don't require a nspace, so don't expect one in the repo

* Add a test to prove the correct number of arguments are being passed
2020-03-04 18:12:47 +00:00