open Logarion

let last a ((t,_) as pair) = match a with
	| None -> Some pair
	| Some (t', _) as pair' ->
		if Text.newest t t' > 0 then Some pair else pair'

let last_mine a ((t, _) as pair) =
	let name = Person.Set.of_string (Sys.getenv "USER") in
	let open Text in
	match a with
	| None -> if Person.Set.subset name t.authors then Some pair else None
	| Some (t', _) as pair' ->
		if Text.newest t t' > 0 && Person.Set.subset name t'.authors
		then Some pair else pair'

let last search_mine =
	let filter = if search_mine then last_mine else last in
	match File_store.fold filter None with
	| None -> ()
	| Some (_, f) -> List.iter print_endline f

open Cmdliner
let term =
	let mine = Arg.(value & flag & info ["mine"] ~doc:"last text authored by me") in
	Term.(const last $ mine),
	Term.info "last" ~doc:"most recent text"
		~man:[ `S "DESCRIPTION"; `P "Print the filename of most recent text" ]