Force/advice user to enter mandatory fields when adding entry

[Heineken]

Problem:
The user can add an entry without description, but he cannot upload it and he doesn't know why.

Proposed fix (one or all of these):

• If e.g. the description is required for an upload (to mundraub.org), a new entry shouldn't be accepted without a description.
• There should be a warning.
• There should be a message explaining why the upload is not possible

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[niccokunzmann]

I would like a text to guide the user, because I would like to decouple the plant information from the API of the platform. So, when I create a plant, I would like to be in control over the information I provide at the moment or later. The platforms may differ in what they expect. So, I would like to be guided on what is required for upload.

Related Code:

mundraub-android/app/src/main/java/eu/quelltext/mundraub/plant/Plant.java

Line 330 in 9259921

public boolean hasRequiredFieldsFilled() {

There could be a second method named:
int getMessageToHelpFillTheRequiredFields()
which then returns the R.string.id for what to do.

This, then can be put into the GUI. Where would you like to see it?

[Heineken]

Decouple means that validity for a platform shouldn't be checked on data entry but only before upload, right?
If so, either

• the upload button should be greyed out and the message in red below
  or
• the message should appear in a popup when pressing "upload"