Implement spoiler functionality

[FoxxMD]

I wasn't originally planning to do this but a user in my server forced my hand after generating some truly heinous images. :smiling_face_with_tear:

• channel-wide spoiler option available via /settings
• per /draw option
• force spoiler on role, option available via /settings

Closes #168

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In /settings it shows formatted role name when present

Can use remove_spoiler_role boolean in settings to entirely remove role in which case it displays spoiler_role - None

The spoiler option in /settings is a default for the channel that can be overridden using the spoiler option in the /draw command

Finally, the entire channel can be forced to use spoilers if the spoiler_role is set to @everyone

[sebaxakerhtc]

It's a really nice PR! Copied it to my repo, thank you!

@FoxxMD There's a PR about Live preview Can you help with Live preview too?

Because if it will be merged - we will need to anyhow hide it.

I try but something wrong here

        with contextlib.ExitStack() as stack:
            buffer = stack.enter_context(io.BytesIO())
            image.save(buffer, 'PNG')
            buffer.seek(0)
            file = discord.File(fp=buffer, filename=f'{queue_object.seed}.png')

How to add your part right way?

            if queue_object.spoiler:
                filename=f'SPOILER_{queue_object.seed}.png'

I tried this way

        with contextlib.ExitStack() as stack:
            buffer = stack.enter_context(io.BytesIO())
            image.save(buffer, 'PNG')
            buffer.seek(0)
            filename=f'{queue_object.seed}.png'
            if queue_object.spoiler:
                filename=f'SPOILER_{queue_object.seed}.png'
            file = discord.File(fp=buffer, filename)

But it gives me SyntaxError: positional argument follows keyword argument

Upd. Solved this way:

        with contextlib.ExitStack() as stack:
            buffer = stack.enter_context(io.BytesIO())
            image.save(buffer, 'PNG')
            buffer.seek(0)
            filename=f'{queue_object.seed}.png'
            if queue_object.spoiler:
                filename=f'SPOILER_{queue_object.seed}.png'
            fp=buffer
            file = discord.File(fp, filename)

Working like a charm!

[Kilvoctu]

Heya, looks nice. Thanks for the PR 👍