urbit/pkg/arvo/app/chat-hook.hoon

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:: chat-hook:
:: mirror chat data from foreign to local based on read permissions
:: allow sending chat messages to foreign paths based on write perms
::
/- *permission-store, *chat-hook
/+ *chat-json
|%
+$ move [bone card]
::
+$ card
$% [%diff [%chat-update chat-update]]
[%quit ~]
[%poke wire dock poke]
[%pull wire dock ~]
[%peer wire dock path]
==
::
+$ state
$% [%0 state-zero]
==
::
+$ state-zero
$: synced=(map path ship)
boned=(map wire (list bone))
==
::
+$ poke
$% [%chat-action chat-action]
[%permission-action permission-action]
==
::
--
::
|_ [bol=bowl:gall state]
::
++ this .
::
++ prep
|= old=(unit state)
^- (quip move _this)
?~ old
:_ this
[ost.bol %peer /permissions [our.bol %permission-store] /updates]~
[~ this(+<+ u.old)]
::
++ poke-noun
|= a=*
^- (quip move _this)
~& synced
~& boned
[~ this]
::
++ poke-json
|= jon=json
^- (quip move _this)
(poke-chat-action (json-to-action jon))
::
++ poke-chat-action
|= act=chat-action
^- (quip move _this)
?> ?=(%message -.act)
:: local
:_ this
?: (team:title our.bol src.bol)
?. (~(has by synced) path.act)
~
=/ ship (~(got by synced) path.act)
=/ appl ?:(=(ship our.bol) %chat-store %chat-hook)
[ost.bol %poke / [ship appl] [%chat-action act]]~
:: foreign
=/ ship (~(get by synced) path.act)
?~ ship
~
?. =(u.ship our.bol)
~
:: scry permissions to check if write is permitted
?. (permitted-scry [(scot %p src.bol) %chat (weld path.act /write)])
~
=: author.envelope.act src.bol
when.envelope.act now.bol
==
[ost.bol %poke / [our.bol %chat-store] [%chat-action act]]~
::
++ poke-chat-hook-action
|= act=chat-hook-action
^- (quip move _this)
?- -.act
%add-owned
?> (team:title our.bol src.bol)
=/ chat-path [%mailbox path.act]
?: (~(has by synced) path.act)
[~ this]
=. synced (~(put by synced) path.act our.bol)
:_ (track-bone chat-path)
%+ weld
[ost.bol %peer chat-path [our.bol %chat-store] chat-path]~
(create-permission [%chat path.act] security.act)
::
%add-synced
?> (team:title our.bol src.bol)
=/ chat-path [%mailbox (scot %p ship.act) path.act]
?: (~(has by synced) [(scot %p ship.act) path.act])
[~ this]
=. synced (~(put by synced) [(scot %p ship.act) path.act] ship.act)
:_ (track-bone chat-path)
[ost.bol %peer chat-path [ship.act %chat-hook] chat-path]~
::
%remove
=/ ship (~(get by synced) path.act)
?~ ship
[~ this]
?: &(=(u.ship our.bol) (team:title our.bol src.bol))
:: delete one of our.bol own paths
:_ %_ this
synced (~(del by synced) path.act)
boned (~(del by boned) [%mailbox path.act])
==
%- zing
:~ (pull-wire [%mailbox path.act])
(delete-permission [%chat path.act])
^- (list move)
%+ turn (prey:pubsub:userlib [%mailbox path.act] bol)
|= [=bone *]
^- move
[bone %quit ~]
==
?. |(=(u.ship src.bol) (team:title our.bol src.bol))
:: if neither ship = source or source = us, do nothing
[~ this]
:: delete a foreign ship's path
:- (pull-wire [%mailbox path.act])
%_ this
synced (~(del by synced) path.act)
boned (~(del by boned) [%mailbox path.act])
==
==
::
++ peer-mailbox
|= pax=path
^- (quip move _this)
?> ?=([* ^] pax)
?> (~(has by synced) pax)
:: scry permissions to check if read is permitted
?> (permitted-scry [(scot %p src.bol) %chat (weld pax /read)])
=/ box (chat-scry pax)
?~ box !!
:_ this
[ost.bol %diff %chat-update [%create (slav %p i.pax) pax]]~
::
++ diff-permission-update
|= [wir=wire diff=permission-update]
^- (quip move _this)
:_ this
?- -.diff
%create ~
%delete ~
%add (handle-permissions [%add path.diff who.diff])
%remove (handle-permissions [%remove path.diff who.diff])
==
::
++ handle-permissions
|= [kind=?(%add %remove) pax=path who=(set ship)]
^- (list move)
?> ?=([* *] pax)
?. =(%chat i.pax) ~
:: check path to see if this is a %read permission
?. =(%read (snag (dec (lent pax)) `(list @t)`pax))
~
=/ sup
%- ~(gas by *(map [ship path] bone))
%+ turn ~(tap by sup.bol)
|=([=bone anchor=[ship path]] [anchor bone])
%- zing
%+ turn ~(tap in who)
|= check-ship=ship
?: (permitted-scry [(scot %p check-ship) pax])
:: if ship is permitted to be subscribed, do nothing
~
:: if ship is not permitted, quit their subscription
=/ mail-path
(oust [(dec (lent t.pax)) (lent t.pax)] `(list @t)`t.pax)
=/ bne (~(get by sup) [check-ship [%mailbox mail-path]])
?~(bne ~ [u.bne %quit ~]~)
::
++ diff-chat-update
|= [wir=wire diff=chat-update]
^- (quip move _this)
?: (team:title our.bol src.bol)
(handle-local diff)
(handle-foreign diff)
::
++ handle-local
|= diff=chat-update
^- (quip move _this)
?- -.diff
%keys [~ this]
%config [~ this]
%create [~ this]
%read [~ this]
%delete
?. (~(has by synced) path.diff)
[~ this]
:_ this(synced (~(del by synced) path.diff))
:- (chat-poke diff)
[ost.bol %pull [%mailbox path.diff] [our.bol %chat-store] ~]~
::
%message
:_ this
%+ turn (prey:pubsub:userlib [%mailbox path.diff] bol)
|= [=bone *]
^- move
[bone %diff [%chat-update diff]]
==
::
++ handle-foreign
|= diff=chat-update
^- (quip move _this)
?- -.diff
%keys [~ this]
%config [~ this]
%read [~ this]
%create
:_ this
?> ?=([* ^] path.diff)
=/ shp (~(get by synced) path.diff)
?~ shp ~
?. =(src.bol u.shp) ~
[(chat-poke [%create ship.diff t.path.diff])]~
::
%delete
?> ?=([* ^] path.diff)
=/ shp (~(get by synced) path.diff)
?~ shp
[~ this]
?. =(u.shp src.bol)
[~ this]
:_ this(synced (~(del by synced) path.diff))
:- (chat-poke diff)
[ost.bol %pull [%mailbox path.diff] [src.bol %chat-hook] ~]~
::
%message
:_ this
?> ?=([* ^] path.diff)
=/ shp (~(get by synced) path.diff)
?~ shp ~
?. =(src.bol u.shp) ~
[(chat-poke diff)]~
==
::
++ quit
|= wir=wire
^- (quip move _this)
~& chat-hook-quit+wir
?: =(wir /permissions)
:_ this
[ost.bol %peer /permissions [our.bol %permission-store] /updates]~
?> ?=([* ^] wir)
?. (~(has by synced) t.wir)
:: no-op
[~ this]
~& %chat-hook-resubscribe
:_ (track-bone wir)
[ost.bol %peer wir [(slav %p i.t.wir) %chat-hook] wir]~
::
++ reap
|= [wir=wire saw=(unit tang)]
^- (quip move _this)
?~ saw
[~ this]
?> ?=(^ wir)
~& %chat-hook-reap
[((slog u.saw) ~) this(synced (~(del by synced) t.wir))]
::
++ chat-poke
|= act=chat-action
^- move
[ost.bol %poke / [our.bol %chat-store] [%chat-action act]]
::
++ permission-poke
|= act=permission-action
^- move
[ost.bol %poke / [our.bol %permission-store] [%permission-action act]]
::
++ create-permission
|= [pax=path sec=chat-security]
^- (list move)
=/ read-perm (weld pax /read)
=/ write-perm (weld pax /write)
?- sec
%channel
:~ (permission-poke (sec-to-perm read-perm %black))
(permission-poke (sec-to-perm write-perm %black))
==
::
%village
:~ (permission-poke (sec-to-perm read-perm %white))
(permission-poke (sec-to-perm write-perm %white))
==
::
%journal
:~ (permission-poke (sec-to-perm read-perm %black))
(permission-poke (sec-to-perm write-perm %white))
==
::
%mailbox
:~ (permission-poke (sec-to-perm read-perm %white))
(permission-poke (sec-to-perm write-perm %black))
==
==
::
++ delete-permission
|= pax=path
^- (list move)
=/ read-perm (weld pax /read)
=/ write-perm (weld pax /write)
:~ (permission-poke [%delete read-perm])
(permission-poke [%delete write-perm])
==
::
++ sec-to-perm
|= [pax=path =kind]
^- permission-action
[%create pax kind *(set ship)]
::
++ chat-scry
|= pax=path
^- (unit mailbox)
=. pax ;:(weld /=chat-store/(scot %da now.bol)/mailbox pax /noun)
.^((unit mailbox) %gx pax)
::
++ permitted-scry
|= pax=path
^- ?
.^(? %gx ;:(weld /=permission-store/(scot %da now.bol)/permitted pax /noun))
::
++ track-bone
|= wir=wire
^+ this
=/ bnd (~(get by boned) wir)
?^ bnd
this(boned (~(put by boned) wir (snoc u.bnd ost.bol)))
this(boned (~(put by boned) wir [ost.bol]~))
::
++ pull-wire
|= pax=path
^- (list move)
?> ?=([* ^] pax)
=/ bnd (~(get by boned) pax)
?~ bnd ~
=/ shp (~(get by synced) t.pax)
?~ shp ~
%+ turn u.bnd
|= =bone
^- move
?: =(u.shp our.bol)
[bone %pull pax [our.bol %chat-store] ~]
[bone %pull pax [u.shp %chat-hook] ~]
::
--