agenda does't work if I use Arabic Language

[Mo-dot2]

Describe
I can't add or view events when I use Arabic Language

To Reproduce

1. change platform language to Arabic (or user language, user selected language)
2. Click on 'personal agenda' (in Arabic "أجندتي")
   or clicking on agenda icon from any course, or clicking on global agenda from administration tab.
3. you'll see "loading" as shown in screenshot and you won't be able to add or view any events

Expected behavior
you'll see "loading" as shown in screenshot and you won't be able to add or view any events.

Screenshots

Desktop (please complete the following information):

• OS: [Windows 10]
• Browser [chrome Version 72.0.3626.119 and firefox 65.0.1]
  I also tried it on chrome mobile application running on android 7

**Server
I have this error in ♥ Chamilo ♥ version 1.11.4 on php 7
also I had the same error in ♥ Chamilo ♥ version 1.11.8 on php 7.2
OS (linux)

Additional context
I experience this error only when language is set on Arabic, but there is no problem when I change the language back to English.

[ywarnier]

Hi @Haboubi92
Thanks for reporting issues with the Arabic language. We have no beta-tester in Arabic so far, so your report is very welcome. We'll have a look and hopefully get that fixed for you before the release of 1.11.10 (this week or the next).
Also, if you feel like we should improve other aspects (we're by no means considering we're doing a good job for Arabic) don't hesitate to open new issues. One issue opening per problem/improvement please.

[Mo-dot2]

Hi @Haboubi92
Thanks for reporting issues with the Arabic language. We have no beta-tester in Arabic so far, so your report is very welcome. We'll have a look and hopefully get that fixed for you before the release of 1.11.10 (this week or the next).
Also, if you feel like we should improve other aspects (we're by no means considering we're doing a good job for Arabic) don't hesitate to open new issues. One issue opening per problem/improvement please.

thank you so much for your reply ♥

[ywarnier]

OK, so the first issue here (not the only one apparently) is that we are missing the translations for the calendar UI, which is a bit tricky because we depend on a plugin of jquery-ui-calendar for that.

The best way to deal with this would be for you to translate the corresponding file here: https://github.com/trentrichardson/jQuery-Timepicker-Addon/tree/master/dist/i18n

Apparently someone already did that here: trentrichardson/jQuery-Timepicker-Addon#956 but the author of the library did not accept it yet (since September). I'm adding a comment there to ask him to do so. I suggest you also do it, so it is included.

This is not all though, there seems to be another issue.

[ywarnier]

I've sent the previous change to Chamilo to prevent the page from failing on the missing .ar.js file. I'm having another issue now but I'm not entirely sure this is not some caching side-effect (of attempting to just create the .ar.js file, which didn't work as is).

[ywarnier]

OK, so the remaining issue with adding an event is that the ajax is called with arabic characters for the dates: /main/inc/ajax/agenda.ajax.php?type=personal&a=get_events&start=٢٠١٩-٠١-٢٨&end=٢٠١٩-٠٣-١١&_=1551747984935
This is... unexpected

[ywarnier]

@jmontoyaa it looks like we are doing one convertion to Arabic in the start and end variables that we shouldn't do (or if we do, we should also convert it back to English universal dates in order to store them in the database).
Any thought?

[ywarnier]

@Haboubi92 not sure that is you, but if it is: thank you for updating the translation to Arabic from https://translate.chamilo.org/ ! Much appreciated.

[Mo-dot2]

@ywarnier
it's my duty to translate ♥ Chamilo ♥ to Arabic
there's a lot of variables to translate
I hope I would finish most of theme in the next few days before 1.11.10 update