Add ability to add and edit event logo and event header

[cangoektas]

Event logos and event headers can currently be shown in the event show view, but not added when creating an event and there's no way in changing the images.

Waiting on the backend APIs to implement this.

Related to #23

[cangoektas]

@ahmedissa I need your help for this one. I think I already implemented about 90 % of this feature but you have to make some small changes.

• Currently the file upload for event logos and event headers can only be done in the edit event view
• For the upload we use the same methods from the avatarFactory in the newly created eventImagesFactory
• I didn't know how to specify the upload for the file as an event logo/header so I think the files are currently uploaded to a avatars directory in AWS (see eventImagesFactory.uploadLogo and eventImagesFactory.uploadHeader)
• In eventShowCtrl we do not save the url of the uploaded images to the event object because currently the response of an upload is user data with the url of the event image being in the avatar field

I think you should be able to fix this in a couple minutes or what do you think?. The important files for you are:

• form-edit-event.html:
  • File select buttons defined pointing to the controller functions logoFileSelected and headerFileSelected (done)
• eventShowCtrl:
  • logoFileSelected and headerFileSelected is where
  • the logo upload functions are called from the eventImagesFactory (done)
  • where the status of the upload is updated for the view (done)
  • where the url of the uploaded image needs to be set as a property for the newly created event (TODO)
• eventImagesFactory:
  • uploadLogo needs to specify event logo instead of avatar (TODO)
  • uploadHeader needs to specify event header instead of avatar (TODO)
  • getEventLogo needs to get the event logo of an event (probably done)
  • getEventHeader needs to get the event header of an event (probably done)

In order to test all this you need to

1. Checkout to branch feature/events-file-uploads
2. Go to localhost:9000/#/event
3. Create new event
4. Click on the event
5. Click on Edit
6. Select file for event logo or event header

[cangoektas]

FYI just fixed some small issues with displaying upload status.

[cangoektas]

@ahmedissa Also removed the branch feature/event-images and replaced it with the branch feature/events-file-uploads

[cangoektas]

Same thing in #35 where we currently try to upload file attachements for an event application as an avatar...

[cangoektas]

@ahmedissa can you take a look at this and #35 in the coming days? I really think it shouldn't take too much time for you 😊