/+  *invite-json, default-agent, dbug
|%
+$  card  card:agent:gall
::
+$  versioned-state
  $%  state-zero
  ==
::
+$  state-zero
  $:  %0
      =invites
  ==
--
::
=|  state-zero
=*  state  -
%-  agent:dbug
^-  agent:gall
=<
  |_  bol=bowl:gall
  +*  this      .
      inv-core  +>
      ic        ~(. inv-core bol)
      def       ~(. (default-agent this %|) bol)
  ++  on-init   on-init:def
  ++  on-save   !>(state)
  ++  on-load
    |=  old=vase
    `this(state !<(state-zero old))
  ::
  ++  on-poke
    |=  [=mark =vase]
    ^-  (quip card _this)
    ?>  (team:title our.bol src.bol)
    =^  cards  state
      ?+  mark  (on-poke:def mark vase)
        %json           (poke-invite-action:ic (json-to-action !<(json vase)))
        %invite-action  (poke-invite-action:ic !<(invite-action vase))
      ==
    [cards this]
  ::
  ++  on-watch
    |=  =path
    ^-  (quip card _this)
    =/  cards=(list card)
      ?+    path  (on-watch:def path)
          [%all ~]         [%give %fact ~ %invite-initial !>(invites)]~
          [%updates ~]     ~
          [%invitatory *]
        =/  inv=invitatory  (~(got by invites) t.path)
        [%give %fact ~ %invite-update !>([%invitatory inv])]~
      ==
    [cards this]
  ::
  ++  on-leave  on-leave:def
  ++  on-peek
    |=  =path
    ^-  (unit (unit cage))
    ?+  path  (on-peek:def path)
      [%x %all ~]         (peek-x-all:ic t.t.path)
      [%x %invitatory *]  (peek-x-invitatory:ic t.t.path)
      [%x %invite *]      (peek-x-invite:ic t.t.path)
    ==
  ::
  ++  on-agent  on-agent:def
  ++  on-arvo   on-arvo:def
  ++  on-fail   on-fail:def
  --
::
|_  bol=bowl:gall
::
++  peek-x-all
  |=  pax=path
  ^-  (unit (unit cage))
  [~ ~ %noun !>(invites)]
::
++  peek-x-invitatory
  |=  pax=path
  ^-  (unit (unit cage))
  ?~  pax
    ~
  =/  invitatory=(unit invitatory)  (~(get by invites) pax)
  [~ ~ %noun !>(invitatory)]
::
++  peek-x-invite
  |=  pax=path
  ^-  (unit (unit cage))
  ::  /:path/:uid
  =/  pas  (flop pax)
  ?~  pas
    ~
  =/  uid=serial  (slav %uv i.pas)
  =.  pax  (scag (dec (lent pax)) `(list @ta)`pax)
  =/  invitatory=(unit invitatory)  (~(get by invites) pax)
  ?~  invitatory
    ~
  =/  invite=(unit invite)  (~(get by u.invitatory) uid)
  [~ ~ %noun !>(invite)]
::
++  poke-invite-action
  |=  action=invite-action
  ^-  (quip card _state)
  ?>  (team:title our.bol src.bol)
  ?-  -.action
      %create   (handle-create action)
      %delete   (handle-delete action)
      %invite   (handle-invite action)
      %accept   (handle-accept action)
      %decline  (handle-decline action)
  ==
::
++  handle-create
  |=  act=invite-action
  ^-  (quip card _state)
  ?>  ?=(%create -.act)
  ?:  (~(has by invites) path.act)
    [~ state]
  :-  (send-diff path.act act)
  state(invites (~(put by invites) path.act *invitatory))
::
++  handle-delete
  |=  act=invite-action
  ^-  (quip card _state)
  ?>  ?=(%delete -.act)
  ?.  (~(has by invites) path.act)
    [~ state]
  :-  (send-diff path.act act)
  state(invites (~(del by invites) path.act))
::
++  handle-invite
  |=  act=invite-action
  ^-  (quip card _state)
  ?>  ?=(%invite -.act)
  ?.  (~(has by invites) path.act)
    [~ state]
  =/  container  (~(got by invites) path.act)
  =.  uid.act  (sham eny.bol)
  =.  container  (~(put by container) uid.act invite.act)
  :-  (send-diff path.act act)
  state(invites (~(put by invites) path.act container))
::
++  handle-accept
  |=  act=invite-action
  ^-  (quip card _state)
  ?>  ?=(%accept -.act)
  ?.  (~(has by invites) path.act)
    [~ state]
  =/  container  (~(got by invites) path.act)
  =/  invite  (~(get by container) uid.act)
  ?~  invite
    [~ state]
  =.  container  (~(del by container) uid.act)
  :-  (send-diff path.act [%accepted path.act uid.act u.invite])
  state(invites (~(put by invites) path.act container))
::
++  handle-decline
  |=  act=invite-action
  ^-  (quip card _state)
  ?>  ?=(%decline -.act)
  ?.  (~(has by invites) path.act)
    [~ state]
  =/  container  (~(got by invites) path.act)
  =/  invite  (~(get by container) uid.act)
  ?~  invite
    [~ state]
  =.  container  (~(del by container) uid.act)
  :-  (send-diff path.act act)
  state(invites (~(put by invites) path.act container))
::
++  update-subscribers
  |=  [pax=path upd=invite-update]
  ^-  card
  [%give %fact ~[pax] %invite-update !>(upd)]
::
++  send-diff
  |=  [pax=path upd=invite-update]
  ^-  (list card)
  :~  (update-subscribers /all upd)
      (update-subscribers /updates upd)
      (update-subscribers [%invitatory pax] upd)
  ==
::
--