Fix: Search not showing next page button when a next page exists

[ChunkyProgrammer]

closes #1708

Similar to (part of): #3864

This PR checks for a continuation token to determine whether a next page button should be shown. A good example to test this with is when adding videos to a playlist.

Test case:

• create a playlist
• go to page to add videos to playlist
• search "yo mama"
• See next page button if using this PR, don't see it if not using this pr

Whether there's a next page or not is not included in the api as it would have to be a breaking change

[syeopite]

Suggested change

	if new_node = node["itemSectionRenderer"]?
	raw_items << new_node["contents"].as_a
	end
	if node["continuationItemRenderer"]?
	raw_items.push([node])
	end
	if new_node = node["itemSectionRenderer"]?
	raw_items << new_node["contents"].as_a
	elsif node["continuationItemRenderer"]?
	raw_items.push([node])
	end

[ChunkyProgrammer]

Iirc they're both in the same object which is why i didnt do an elsif. I can probably double check in a few days (not at my computer right now)

[SamantazFox]

I'm wondering, what's the use case for that?
If I understand correctly, it will extract the continuation for shelf renderers and alike?

[ChunkyProgrammer]

Yeah, for the search page, the continuation seems to be in the same json object as the itemSectionRenderer

[SamantazFox]

@syeopite improving upon your suggestion with the use of <<
@ChunkyProgrammer after that I think we're all good ^^

Suggested change

	if new_node = node["itemSectionRenderer"]?
	raw_items << new_node["contents"].as_a
	end
	if node["continuationItemRenderer"]?
	raw_items.push([node])
	end
	if new_node = node["itemSectionRenderer"]?
	raw_items << new_node["contents"].as_a
	elsif node["continuationItemRenderer"]?
	raw_items << node
	end

[ChunkyProgrammer]

There seems to still be continuation tokens but no next page... (the button displays but clicking the button leads to a blank page)

[ChunkyProgrammer]

There's some issues with this PR so I'll be closing it for the time being, I might open another PR in a few weeks that should hopefully work better