urbit/pkg/arvo/ted/group/on-leave.hoon

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/- spider, grp=group-store, gra=graph-store, met=metadata-store, hook=metadata-hook
/+ strandio, res=resource
::
=* strand strand:spider
=* raw-poke raw-poke:strandio
=* scry scry:strandio
::
^- thread:spider
|= arg=vase
=/ m (strand ,vase)
^- form:m
=+ !<([=update:grp ~] arg)
?. ?=(%remove-group -.update)
(pure:m !>(~))
;< =bowl:spider bind:m get-bowl:strandio
:: stop serving or syncing metadata associated with group
::
;< ~ bind:m
%+ raw-poke
[our.bowl %metadata-hook]
:- %metadata-hook-action
!> ^- metadata-hook-action:hook
[%remove (en-path:res resource.update)]
::
:: get metadata associated with group
;< =associations:met bind:m
%+ scry associations:met
;: weld
/gx/metadata-store/group
(en-path:res resource.update)
/noun
==
=/ entries=(list [g=group-path:met m=md-resource:met])
~(tap in ~(key by associations))
|- ^- form:m
=* loop $
?~ entries
(pure:m !>(~))
:: remove metadata associated with group
::
;< ~ bind:m
%+ raw-poke
[our.bowl %metadata-store]
:- %metadata-action
!> ^- metadata-action:met
[%remove g.i.entries m.i.entries]
:: archive graph associated with group
::
;< ~ bind:m
%+ raw-poke
[our.bowl %graph-store]
:- %graph-update
!> ^- update:gra
[%0 now.bowl [%archive-graph (de-path:res app-path.m.i.entries)]]
loop(entries t.entries)