Please provide getSectionCount() and getSection(position)

[ghost]

Please, correct me, if I'm doing something wrong. I have sections with header and items. Each section has id. When I need to add\remove\update item in this section I do:

for (s in 0 until adapter.groupCount) {
	val section = adapter.getGroup(s) as DFLineSection
	if (section.sectionKey != tournamentId) continue
	val groupCount = section.groupCount
	for (i in 1 until groupCount) { // 1 to ignore header
		val item = section.getGroup(i) as DFLineItem
		if (item.event.key != serverMarket.key.eventId) continue
...

The problem - adapter.groupCount returns number of all items I have in the list, not sections. adapter.getGroup(s) works almost correctly - for each s it returns correct section, but as many times as many items this section has.
What I believe would be very useful - possibility to get number of and then navigate directly by sections.

Also I would like to have adapter.removeSection(position) and section.removeItem(position), now it is only possible to remove using section\item as argument.

[ValCanBuild]

A Section is a subclass of a Group and GroupAdapter already provides methods for removing Groups. You've got remove(Group) and removeGroup(index) which you can use.

Groupie is built with composability in mind. Your adapter could be built from many sections, each with subsections and subsubsections etc. If you want to keep a track of a particular Group/Section you want to update then store a reference to it and just directly update it.

[ghost]

Well, but then there is non obvious point:
adapter.groupCount returns sections count, but adapter.getGroup(position) returns group containing item with raw position
Let's imagine situation

section1
   item
section2
   item

adapter.groupCount returns 2
but adapter.getGroup(1) returns section1
Finally I managed to understand what is happening, but I believe it should be better explained in docs.

[ValCanBuild]

@AlexMatiash agreed on that point. Those methods need to be named better. Perhaps it'll be useful to have a getTopLevelGroup(topLevelGroupPosition) type method. I agree the current naming is confusing.

I'll explore for the next release

[ValCanBuild]

@AlexMatiash PR opened #296

[ValCanBuild]

Now deployed in 2.7.0