urbit/pkg/arvo/app/dns-collector.hoon
2019-07-18 11:51:34 -07:00

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/- dns
::
:: app types and boilerplate
::
=> |%
+$ app-state
$: %0
requested=(map ship address:dns)
completed=(map ship binding:dns)
==
+$ peek-data [%noun (list (pair ship address:dns))]
+$ in-poke-data
$% [%dns-address =address:dns]
[%dns-complete =ship =binding:dns]
==
+$ out-poke-data
$% [%drum-unlink =dock]
==
+$ out-peer-data
$% [%dns-binding =binding:dns]
[%dns-request =request:dns]
==
+$ card
$% [%diff out-peer-data]
[%poke wire =dock out-poke-data]
==
+$ move [bone card]
--
::
=| moves=(list move)
|_ [=bowl:gall state=app-state]
::
++ this .
::
++ abet
^- (quip move _this)
[(flop moves) this(moves ~)]
::
++ emit
|= mov=move
^+ this
this(moves [mov moves])
::
++ emil
|= moz=(list move)
|- ^+ this
?~ moz
this
$(moz t.moz, ..this (emit i.moz))
::
++ poke-app
|= [=wire =dock =out-poke-data]
^+ this
(emit [ost.bowl %poke wire dock out-poke-data])
::
++ give-result
|= [=the=path =out-peer-data]
^+ this
%- emil
%+ turn
^- (list bone)
%+ murn ~(tap by sup.bowl)
|= [ost=bone =ship =sub=path]
`(unit bone)`?.(=(the-path sub-path) ~ (some ost))
|= =bone
[bone %diff out-peer-data]
::
++ prep
|= old=(unit app-state)
^- (quip move _this)
=< abet
?~ old
(poke-app /unlink [[our %hood] [%drum-unlink our dap]]:bowl)
this(state u.old)
::
++ poke
|= =in-poke-data
^- (quip move _this)
=< abet
?- -.in-poke-data
%dns-address
=* who src.bowl
=* adr address.in-poke-data
=/ rac (clan:title who)
?. ?=(?(%king %duke) rac)
~| [%dns-collector-bind-invalid who] !!
?: (reserved:eyre if.adr)
~| [%dns-collector-reserved-address who if.adr] !!
::
=/ req=(unit address:dns) (~(get by requested.state) who)
=/ dun=(unit binding:dns) (~(get by completed.state) who)
?: &(?=(^ dun) =(adr address.u.dun))
=. requested.state (~(del by requested.state) who)
(give-result /(scot %p who) %dns-binding u.dun)
::
?: &(?=(^ req) =(adr u.req))
this
:: XX check address?
=/ =request:dns [who adr]
=. requested.state (~(put by requested.state) request)
(give-result /requests %dns-request request)
::
%dns-complete
:: XX or confirm valid binding?
::
?. (team:title [our src]:bowl)
~| %complete-yoself !!
=* who ship.in-poke-data
=* adr address.binding.in-poke-data
=* tuf turf.binding.in-poke-data
=/ req=(unit address:dns) (~(get by requested.state) who)
:: ignore established bindings that don't match requested
::
?: ?& ?=(^ req)
!=(adr u.req)
==
this
=: requested.state (~(del by requested.state) who)
completed.state (~(put by completed.state) who [adr tuf])
==
(give-result /(scot %p who) %dns-binding adr tuf)
==
::
++ peek
|= =path
^- (unit (unit peek-data))
~& path
?+ path [~ ~]
[%x %requested ~]
[~ ~ %noun ~(tap by requested.state)]
==
::
++ peer
|= =path
^- (quip move _this)
=< abet
:: will be immediately unlinked, see +prep
::
?: ?=([%sole *] path)
this
?. ?=([@ ~] path)
~| %invalid-path !!
?: ?=(%requests i.path)
=/ requests ~(tap by requested.state)
|- ^+ this
=* loop $
?~ requests
this
=. ..this (give-result path %dns-request i.requests)
loop(requests t.requests)
::
=/ who=(unit @p) (slaw %p i.path)
?~ who
~| %invalid-path !!
?~ dun=(~(get by completed.state) u.who)
this
(give-result path %dns-binding u.dun)
--