Port Calendar module to Drupal 8

I also have the same question

There are no plans for Drupal 8 at this time, although anyone who can create a Drupal 8 port is very welcome to attach it here for review.

Has anyone tried working with the Drupal Module Upgrader? I found it a while back and I wonder if it'd be useful here.

pjonckiere and I are making an attempt to port this to drupal 8.
If anyone feels like helping check https://github.com/geertvd/calendar

I'll post back here when we've made some progress.

Great work geertvd! Let us know when you feel it's ready for use.

That are good news geertvd, as soon as this module is ported to D8 i can start porting one of my modules based on the calendar module. I will try to help with patches.

@pjonckiere Great work! I wasn't able to create a calendar. Can you please give us a list of steps to create a simple calendar?

@pjonckiere Excellent work! :-) I've merged your GitHub tree into the 8.x-1.x branch here.

I've given geertvd and you commit access. Please feel free to continue your work on Drupal.org and create issues in the queue for remaining tasks. We can update this issue's summary with links to new subissues.

Good work!! Thanks for outlining the steps. Did the work and got it working on d8rc2. Formating the display obviously needs some work. I'll be following this closely!!

@pjonckiere: Nice work and @fizk thanks for committing that to the Calendar D8 dev.

I have a Beta15 test site that I've migrated a 5 year old D6 site to and I was able to create a month Calendar that renders the calendar type content without having to revisit or reformat the content type. This goes a long way to make migrations more efficient. I'll have to dig in and look at rendering the different months but wow, this is a great start.

@pjonckiere, @fizk and @geertvd. I would like to help out on this project. I am working with Acquia to port modules to Drupal 8 for upcoming projects so I might have significant time available.

Let me know how I can help. I have a fair amount experience in Drupal 8 module development including a couple contrib modules and I am pretty experienced with Views handlers and hooks in Drupal 7.

Should I just grab 8.x issues that aren't assigned?

Thanks

@tedbow @pjonckiere Thanks guys, I'm happy to see so much traction happening here.

Ouch. So for the moment, calendar-heavy apps should stick with Drupal 7?

Does your crystal ball say anything about when that might change?

Hi @dankegel. Your crystal ball is right over here: https://www.drupal.org/project/issues/calendar?version=8.x-1.x-dev

@tedbow is doing some great work with porting and fixing issues. Please help make this change by installing the D8 version, testing and posting / contributing to the issue queue above.

OK, I guess I'll join you at the coalface, then :-)

I just tested the latest dev on a fresh install. I added a date field to Article Content Type. Then used Devel to generated 50 contents. I created a Views and set the display style to Calendar. I added the date field and title in the Views.

Then, the error below came out:

\Drupal\calendar\Plugin\views\style\CalendarStyle: A calendar date argument is required when using the calendar style, but it is missing or is not using the default date.

I tried, but couldn't find a way to provide this date argument to the display style. Where is this setting?

@dankegel Sounds good ;)

@skyredwang - It's probably best creating a new issue for this tagged for 8.x-1.x-dev, as your error will probably be missed here on this porting issue. Haven't seen this one myself yet though.

Hi folks,
can someone expand on that recipe in comment #12 for how to create a test calendar?
I tried to follow it, and got lost at "row plugin".

I'm using drupal 8.0.1 (installed by hand per http://kegel.com/d8demo.txt)

In the meantime I'll keep futzing and see if I can get a calendar to display.

@ dankegel:
Drupal 8.0.1 here,
- the #12 approach didn’t work for me, no matter what I tried
- the #26 "add view from template" worked, but with no "end date" available on the date field, calendar is unusable for events, so...
any idea?

@JotaMG, re:

but with no "end date" available on the date field, calendar is unusable for events, so...

Yes this is a limitation of Date in core in 8.0.x. Hopefully this will be added in 8.1 or the Date module.
You add second date field for the end of events but this won't be reflected in Calendar.

You add second date field for the end of events but this won't be reflected in Calendar.

What you mean?
If for instance I add a second date field and name it something like "field_end_date" will it not be recognized by Calendar?
It is not perfect but can work, if Calendar knows what to do with it.

So, this is a Calendar problem??
And, if you have the "Allowed number of values" of the Date field to "unlimited", why does the second date is not stored as "value2" ??
1) If that happens, then the end date will work??
2) Or, why not have a "Range Date" field, based on Date?

Well I'm a newbie, I've started with Drupal only a week ago...
(coming from Plone)
But I'm really surprised by this issue, it is so basic!
I want to help, but I need some pointers to guide me...
Could I create a new Range Date field that can work with the current 8.x Calendar?
Or should I hack the current Date field?
Where to start?
Who decided that "all end dates are currently set to the start date"??
And, why??
J.

@JotaMG, please notice the current status of this porting is still in progress. Once it's finished, there will be a stable release. You have two options: 1. Understand all the related problems to this issue and try to work with the community and contribute back; 2. Implement a quick and dirty solution in your custom code.

Re #26, #28, and #29 -- I don't see an "add view from template" option on in admin/structure/views.
I'm using drupal 8.0.1 and calendar 8.x-1.x-dev.

Worse, I can't add a field of type calendar datetime, it doesn't show up in the list of choices when adding a field to a content type.

Sure could use a step by step guide to trying out calendar with drupal 8.

A stupid question for you, but I would like to understand exactly what is the difference between "the core and date contrib module" ?
When you say a "stand-alone date range module", you mean a module that only implements a date range field, right?

that is the default behaviour if no end date is identified

How is done this identification? Where is the code, so I can take a look?

@dankegel:
Do you have views_templates installed?
I'm using version 8.x-1.0-alpha1 with Calendar 8.x-1.x-dev, and it works.

@jotaMG: "drush pm-list | egrep "Calendar|views_templates" says

Date/Time Calendar (calendar) Module Enabled 8.x-1.x-dev
Date/Time Calendar Datetime (calendar_datetime) Module Enabled 8.x-1.x-dev
Views Views templates (views_templates) Module Enabled 8.x-1.0-alpha1

So I think I have the same versions as you, more or less. I installed mine two days ago, maybe they're fresher and more broken?
Here's the procedure I used to install: https://github.com/dankegel/d8demo
i.e. composer to create a new d8 project, drush to run d8 "install" process. Is that incorrect?

Can you give me a quick and dirty step by step of how to create a trivial event content type and a calendar page that uses it?
I can try it and reply with a screenshot of where I get stuck, and anything else you like.

I did not wrote down the steps, I was not expecting it to work... :-)
I did create a new CT, with a Date field

body 	Text (formatted, long, with summary) 	
field_date_of_event 	Date
...

I named it "date_of_event" but I presume you can call any other name
Added content to my CT
Then views -> add view from template, and choose my CT, I think it is all I did?

Oh.

My Views page does not have "add view from template". Why does yours, I wonder?

When I created an Event type using Date, added a view via "add new view" and formatted Event as a Calendar, I got the error

\Drupal\calendar\Plugin\views\style\CalendarStyle: A calendar date argument is required when using the calendar style, but it is missing or is not using the default date.

when trying to save the view.

Reading the README as it now stands would probably have gotten me a long ways, thanks.
I'll open a support ticket for any further problems I hit.

Thanks to @jotamg's ideas and @dankegel's questions, I managed to write up a tutorial on this if people are stuck: https://www.ostraining.com/blog/drupal/d8-calendar/

Thanks for the progress. Seems that I will take a look to the modul next days ...

@date start - end: there is still a "date combo" modul available required by MERCI. Maybe this is usefull ... (but cant find the source at the moment) [update: its called now interval field https://www.drupal.org/project/interval]

What the status of translation.

My D8 installation say, it cant find translation files neither at http://ftp.drupal.org/files/translations/8.x/calendar/calendar-8.x-1.x.d... nor at translations://calendar-8.x-1.x.de.po

I would like to see a translation file for German, were i can help to translate the text.

@MartinMa end date is going to be added to DRupal core at which time this module will need to be updated.

see #2543958: [META] DateTime Module Improvements
for that other date related core issues.

Note that the patch at #2161337: Add a Date Range field type with support for end date is working pretty well, so that core Date fields can now include the end date. I've been testing it in 8.1.0-beta2 with the latest Calendar 8.x.dev and the Views Templates 8.1.alpha modules and have a calendar functioning.

The exception of course is no display of multiday events - Calendar has end date set to start date at the moment. In DateFieldWrapper.php the function getEndTimeStamp() returns getStartTimeStamp() as someone mentions above I believe. Step 1 in getting multiday events to work seems to be to copy getStartTimeStamp() to getEndTimeStamp(), changing 'value' to 'value2'.

Beyond that, I've narrowed down the work that needs to be done to calendar\Plugin\views\row\Calendar - the prerender, render, and explode functions - plus CalendarHelper::dateViewFields. In case anyone wants to take a look...

I am not sure if this is currently broken or if I am doing something wrong. I have a content type with a date field that is set to unlimited values. I added the calendar view through the views template (A calendar view of the 'Date' field in the 'Content' base table), but events with multiple dates are only shown on the first date that's stored in the field. The other values are ignored. I expected the event to be listed on every date that's stored in the date field.

Is this a bug?

@pjonckier Thanks. I did a clean install with only D8 and the calendar module and it worked as expected. I need to investigate what's wrong with my other setup and eventually open another issue when I found the reason.

Re #53:
I've opened an issue #2699477: Steps towards handling end dates in Calendar 8 with some notes and code snippets which yield a calendar that handles multiday events. No patches yet - mostly a guideline to the areas that need revision for handling End Dates.

Any ideas why I need to change

$item_start_date = \DateTime::createFromFormat($storage_format, $row->{$info['query_name']});
$item_end_date = \DateTime::createFromFormat($storage_format, $row->{$info['query_name']});

in /modules/contrib/calendar/src/Plugin/views/row/Calendar.php

to

$item_start_date = \DateTime::createFromFormat('U', $row->{$info['query_name']});
$item_end_date = \DateTime::createFromFormat('U', $row->{$info['query_name']});

when working with "authored on" date field? field stores timestamp format and seems like I can't use anything else other than 'U' format ... How can I change $storage_format format?

Audrius

Hi Guys,
I've noticed a small oddity with the month display in that the "today" class is not updating itself on a day to day basis. If that last time the site cache cleared was last Wednesday then the "today" class remains on last Wednesday's date. Clear the cache and it corrects itself.

Any thoughts?

Andrew

#56 Sorry for not answering sooner, I created a separate issue for this just now #2769085: Authored on calendar view throwing errors, will try to look into it soon

#57 seems like a caching issue indeed, mind splitting this up in a separate issue? I'm planning to do some Calendar work over the weekend and this might be a nice one to work on.

Hi,

Thanks for porting the Calendar module. I have one small problem. Name of months and fully writen days are in english and not in dutch. Where can i do the correct setting?

Thanks,
Fred

Guess it can be related to https://www.drupal.org/node/2701413

Hi,
Drupal 8.0.2 beta2 now has an - experimental - daterange field. I tried it out but noticed that when building a calendar this field is not shown in the list of views from templates. So basically you can't use this new field in D8 calendars.
Not sure if this is the right place to post this. But would be great to have daterange ie start en end dates in calendar on D8 no?

Kind greetings
Frank

Same issue/request as #61.

Am trying to get calendarscript up and running am having success using it in page mode as a view hooked to my main menu. When I expose the view as a block and install the block the calendar comes up as it did in 7 and looks fine. However, when I change months in the block view only I am getting a page not found error when trying to go back and forth in months from the current month.

I have looked and tried several things. I have cleared and disabled caching both on site and views level. I have tweaked and turned every setting in views and nothing is working.

Any ideas ?

--posted incorrectly--

Hi all,
So from Drupal 8.2.x we have new field type Datetime Range.
Make sense use this field instead of datetime type field?

I think calendar should support Datetime range too, but not just that, because Datetime Range field always needs an end date and it is not possible to define just a start date (time). But it is an absolutely possible use case.

For those wanting to add a calendar block to the sidebar, I found that adding a BLOCK display output to the view simply didn't work as expected, so my work around was to use the 'Month' page view and using the 'Insert View' filter module created a custom block with [view:view_name=view_display_name] as its content.

I'm looking forward to seeing this module become a full D8 release.

There is still an issue with an event time zone shown in a calendar.

Example: content date/time field has value of 9pm, View field output field shows correct 9pm, BUT position in day list is 10am (-11 hours) which for me here in Australia is the correct GMT difference.

Also getting random '\Drupal\calendar\Plugin\views\style\CalendarStyle: A calendar date argument is required when using the calendar style, but it is missing or is not using the default date' error.

Clearing cache sometimes helps but not always. There is no reason why the view works one moment and then returns the error the next without any site config or content changes.

Hi all !
Does anybody manage to make it work with following configuration (everything up-to-date at this time) :

• Drupal 8.2.2
• viiews_templates 8.x-1.0-alpha1+0-dev
• calendar source code cloned from git today (11/11/16)

With this configuration, calendar is empty, no error message.
Tested with template or with a new field, followed the debug page strictly... sorry...

Any idea ?

Why is this issue so lazy ? Nobody use D8 and calendar anymore ?

@labiloute@neuf.fr It is an open source project in which people typically work on issues in their free time for free. There can be a lot of reasons if something do not shows quick progress. And there are a lot of ways to help something go forward.

By the way there were 3 new commits in November (https://www.drupal.org/node/92594/commits) and there are a lot of issues to resolve (https://www.drupal.org/project/issues/calendar?text=&status=Open&priorit...)

@labiloute@neuf.fr: To answer your earlier query, here's how I have been using the Drupal 8 version of the Calendar module.

Drupal core 8.2.3
Calendar 8.x-1.x-dev (2016-May-05)
Views Templates 8.x-1.0-alpha1

Note: I am using the Dev from 2016-May-05 because of an unresolved bug in the latest Dev that pushes calendar events one day forward.

Attached is a screenshot of my settings page.

@awasson is this using DateRange or multiple DateTime fields?

@labiloute@neuf.fr - Calendar is a pretty substantial module, it's a great testament to the maintainers it is already so far along. At a guess the state of Date in core is a major headache. Date is constantly being developed to add all of the missing features which should have been shipped at launch. Some of these changes are pretty fundamental so their impact on dependent modules, like Calendar will be severe.

@thamas, @awasson, @dkre,
Thanks guys, and sorry for a rude way of expressing my frustration ;)
I am myself contributing on my free time to a bunch of FOSS, but on Drupal, I have to concede that I am just a pure "consumer".

Anyhow I am surprised that one year after the official released of Drupal 8 some of the most important modules are still in dev (I think of simplenews as well)...

Anyway ! Thanks for all your advices and as soon as I can give a hand for it, I'll do !

Cheers to all and long life !

@labiloute@neuf.fr :)

Hello,

I need a calendar for the website I'm currently building. Currently I can't make "Calendar" working.

I only created a new view from template "Content Authored on Calendar" on a fresh new site.
And generating about 20 node via devel generate.

My calendar is empty and i get this error about 6 times (6 should be the number of node "created" in December I guess).

Notice: Undefined variable: rows in Drupal\calendar\Plugin\views\row\Calendar->render() (line 528 of modules/contrib/calendar/src/Plugin/views/row/Calendar.php).
Warning: Invalid argument supplied for foreach() in Drupal\calendar\Plugin\views\style\Calendar->render() (line 544 of modules/contrib/calendar/src/Plugin/views/style/Calendar.php).

(full error stack : http://pastebin.com/Jk1mnJ29)

I'm using the last drupal stable on a fresh install with only basic modules installed (devel, module_filter...)

I'll try to dig on this issue today and submit a patch if I get the module to work.

@Kgaut: Besides getting things working generally, we also need to add support for #2161337: Add a Date Range field type with support for end date as currently, or whenever the module was last working, all events were assumed to be one (1) hour in length as there was no means by which to define end times. This should add the missing piece, and is actually #2820255: need Views Template for Date Range' field data .

@geertvd: Are you still working on the port? This issue is still assigned to you. I'm seeing some D8 issues in the queue. Should we keep this issue open, or close it to work on individual issues? This one is starting to get long. Also, there are some RTBCed issues. Do you need help with module maintenance, committing patches and publishing releases? I could pitch in as a co-maintainer.

Is there a roadmap for a alpha or beta release?
Beside adding support for Date Range, is there any major task preventing a release? What can be done to help?

@colan: It's difficult to find some free time to do so. As far as this issue goes, I think we can close it since the port is already started.
New issues should be created for any problems instead of commenting here to keep a better overview.

> Do you need help with module maintenance, committing patches and publishing releases? I could pitch in as a co-maintainer.

Any help is appreciated, I know some patches have already been submitted but again haven't had time to look into those.
As for adding you as co-maintainer, I don't have enough permissions to do that. I think @fizk added @pjockiere and myself.

@rmarques: Although support Date Ranges is definitely as must before we can do a stable release it is not on top of my list for now. We still have a lot of cleanup to do and we need to fix some major regressions before we can start adding new features (I consider Date Ranges a new feature since it's a separate field type now).

For now let's focus on fixing #2604546: Timezone handling, most code for timezones is commented out at the moment, this logic is spread out all over the module and it would be nice if we could simplify this.
Besides that one, there seem to be a number of things broken after new core upgrades which definitely need attention also, I think it would be really helpful if someone picked up #2736071: Add test-coverage and help to identify all of these issues and prevent regressions in the future.

I have some free time coming up in 2 weeks, not making any promises but I will do my best to do some work in the issue queue..

@geertvd: Thanks for the detailed response. Closing as suggested.

All: Please direct issues elsewhere in the queue. Do not post issues in this ticket. Thanks!

Ok, but shouldn't there be a full Drupal 8 release before this is closed? Or perhaps a follow-up item to indicate that this is something that needs to be done?

Plus, the documentation needs to be cleaned up on the project page. The status of this issue makes it pretty confusing.

I added related issue so we can track the progress of issues we want in the first D8 release #2944547: Release a stable Drupal 9 version of Calendar

Someone should also really change the project page as I stated above. Maybe we could link to this new issue instead.