link-hooks: deactivated and deleted state

This commit is contained in:
Logan Allen 2020-08-19 16:21:42 -07:00
parent a4e21da3f0
commit 291ec5526b
2 changed files with 47 additions and 945 deletions

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@ -1,644 +1,42 @@
:: link-listen-hook: get your friends' bookmarks
:: link-listen-hook: no longer in use
::
:: keeps track of a listening=(set app-path). users can manually add to and
:: remove from this set.
::
:: for all ships in groups associated with those resources, we subscribe to
:: their link's local-pages and annotations at the resource path (through
:: link-proxy-hook), and forward all entries into our link-store as
:: submissions and comments.
::
:: if a subscription to a target fails, we assume it's because their
:: metadata+groups definition hasn't been updated to include us yet.
:: we retry with exponential backoff, maxing out at one hour timeouts.
:: to expede this process, we prod other potential listeners when we add
:: them to our metadata+groups definition.
::
::
/- listen-hook=link-listen-hook, *metadata-store, *group, *link
/+ mdl=metadata, default-agent, verb, dbug, group-store, grpl=group, resource, store=link-store
/+ default-agent, verb, dbug
::
~% %link-listen-hook-top ..is ~
|%
+$ versioned-state
$% [%0 state-0]
[%1 state-1]
[%2 state-2]
[%3 state-3]
$% [%0 *]
[%1 *]
[%2 *]
[%3 *]
[%4 ~]
==
+$ state-3 state-1
+$ state-2 state-1
+$ state-1
$: listening=(set app-path)
state-0
==
+$ state-0
$: retry-timers=(map target @dr)
:: reasoning: the resources we're subscribed to,
:: and the groups that cause that.
::
:: we don't strictly need to track this in state, but doing so heavily
:: simplifies logic and reduces the amount of big scries we do.
:: this also gives us the option to check & restore subscriptions,
:: should we ever need that.
::
reasoning=(jug [ship app-path] group-path)
==
::
+$ what-target ?(%local-pages %annotations)
+$ target
$: what=what-target
who=ship
where=path
==
++ wire-to-target
|= =wire
^- target
?> ?=([what-target @ ^] wire)
[i.wire (slav %p i.t.wire) t.t.wire]
++ target-to-wire
|= target
^- wire
[what (scot %p who) where]
::
+$ card card:agent:gall
--
::
=| [%3 state-3]
=| [%4 ~]
=* state -
::
%- agent:dbug
%+ verb |
^- agent:gall
=<
|_ =bowl:gall
+* this .
do ~(. +> bowl)
def ~(. (default-agent this %|) bowl)
::
++ on-init
^- (quip card _this)
:_ this
~[watch-metadata:do watch-groups:do]
::
++ on-save !>(state)
++ on-load
|= =vase
^- (quip card _this)
=/ old=versioned-state
!<(versioned-state vase)
=| cards=(list card)
|-
=* upgrade-loop $
?- -.old
%3 [cards this(state old)]
::
%2
:_ this(state [%3 +.old])
%+ welp cards
:~ [%pass /groups %agent [our.bowl %group-store] %leave ~]
watch-groups:do
==
::
%1
:: the upgrade from 0 left out local-only collections.
:: here, we pull those back in.
::
=. listening.old
(~(run in ~(key by reasoning.old)) tail)
=/ resources=(list [=group-path =app-path])
%~ tap in
%. %link
%~ get ju
.^ (jug app-name [group-path app-path])
%gy
(scot %p our.bowl)
%metadata-store
(scot %da now.bowl)
/app-indices
==
|-
?~ resources
upgrade-loop(old [%2 +.old])
=, i.resources
=/ members=(set ship)
(members-from-path:grp:do group-path)
:: if we're the only group member, this got incorrectly ignored
:: during 0's upgrade logic. watch it now.
::
?. &(=(1 ~(wyt in members)) (~(has in members) our.bowl))
$(resources t.resources)
=^ more-cards state
(handle-listen-action:do %watch app-path)
$(resources t.resources, cards (weld more-cards cards))
::
%0
=/ listening=(set app-path)
(~(run in ~(key by reasoning.old)) tail)
$(old [%1 listening +.old])
==
::
++ on-agent
|= [=wire =sign:agent:gall]
^- (quip card _this)
=^ cards state
?+ wire ~|([dap.bowl %weird-agent-wire wire] !!)
[%metadata ~]
(take-metadata-sign:do sign)
::
[%groups ~]
(take-groups-sign:do sign)
::
[%links ?(%local-pages %annotations) @ ^]
(take-link-sign:do (wire-to-target t.wire) sign)
::
[%forward ^]
(take-forward-sign:do t.wire sign)
::
[%prod *]
?> ?=(%poke-ack -.sign)
?~ p.sign [~ state]
%- (slog leaf+"prod failed" u.p.sign)
[~ state]
==
[cards this]
::
++ on-poke
|= [=mark =vase]
?+ mark (on-poke:def mark vase)
%link-listen-poke
=/ =path !<(path vase)
:_ this
%+ weld
(take-retry:do %local-pages src.bowl path)
(take-retry:do %annotations src.bowl path)
::
%link-listen-action
?> (team:title [our src]:bowl)
=^ cards state
~| p.vase
(handle-listen-action:do !<(action:listen-hook vase))
[cards this]
==
::
++ on-arvo
|= [=wire =sign-arvo]
^- (quip card _this)
?+ sign-arvo (on-arvo:def wire sign-arvo)
[%g %done *]
?~ error.sign-arvo [~ this]
=/ =tank leaf+"{(trip dap.bowl)}'s message went wrong!"
%- (slog tank tang.u.error.sign-arvo)
[~ this]
::
[%b %wake *]
?> ?=([%retry @ @ ^] wire)
?^ error.sign-arvo
=/ =tank leaf+"wake on {(spud wire)} went wrong!"
%- (slog tank u.error.sign-arvo)
[~ this]
:_ this
(take-retry:do (wire-to-target t.wire))
==
::
++ on-peek
|= =path
^- (unit (unit cage))
?+ path ~
[%x %listening ~] ``noun+!>(listening)
[%x %listening ^] ``noun+!>((~(has in listening) t.t.path))
==
::
++ on-watch
|= =path
^- (quip card _this)
?. ?=([%listening ~] path) (on-watch:def path)
?> (team:title [our src]:bowl)
:_ this
[%give %fact ~ %link-listen-update !>([%listening listening])]~
::
++ on-leave on-leave:def
++ on-fail on-fail:def
--
::
::
|_ =bowl:gall
+* md ~(. mdl bowl)
++ grp ~(. grpl bowl)
+* this .
def ~(. (default-agent this %|) bowl)
::
:: user actions & updates
++ on-init [~ this]
++ on-save !>(state)
++ on-load
|= =vase
^- (quip card _this)
:_ this
[%pass /groups %agent [our.bowl %group-store] %leave ~]~
::
++ handle-listen-action
|= =action:listen-hook
^- (quip card _state)
::NOTE no-opping where appropriate happens further down the call stack.
:: we *could* no-op here, as %watch when we're already listening should
:: result in no-ops all the way down, but walking through everything
:: makes this a nice "resurrect if broken unexpectedly" option.
::
=* app-path path.action
=^ cards listening
^- (quip card _listening)
=/ had=? (~(has in listening) app-path)
?- -.action
%watch
:_ (~(put in listening) app-path)
?:(had ~ [(send-update action)]~)
::
%leave
:_ (~(del in listening) app-path)
?.(had ~ [(send-update action)]~)
==
=/ groups=(list group-path)
(groups-from-resource:md %link app-path)
|-
?~ groups [cards state]
=^ more-cards state
?- -.action
%watch (listen-to-group app-path i.groups)
%leave (leave-from-group app-path i.groups)
==
$(cards (weld cards more-cards), groups t.groups)
::
++ send-update
|= =update:listen-hook
^- card
[%give %fact ~[/listening] %link-listen-update !>(update)]
::
:: metadata subscription
::
++ watch-metadata
^- card
[%pass /metadata %agent [our.bowl %metadata-store] %watch /app-name/link]
::
++ take-metadata-sign
|= =sign:agent:gall
^- (quip card _state)
?- -.sign
%poke-ack ~|([dap.bowl %unexpected-poke-ack /metadata] !!)
%kick [[watch-metadata]~ state]
::
%watch-ack
?~ p.sign [~ state]
=/ =tank
:- %leaf
"{(trip dap.bowl)} failed subscribe to metadata store. very wrong!"
%- (slog tank u.p.sign)
[~ state]
::
%fact
=* mark p.cage.sign
=* vase q.cage.sign
?. ?=(%metadata-update mark)
~| [dap.bowl %unexpected-mark mark]
!!
%- handle-metadata-update
!<(metadata-update vase)
==
::
++ handle-metadata-update
|= upd=metadata-update
^- (quip card _state)
?+ -.upd [~ state]
%add
?> =(%link app-name.resource.upd)
:: auto-listen to collections in unmanaged groups only
::
=/ rid=resource
(de-path:resource group-path.upd)
=/ =group
(need (scry-group:grp rid))
?. hidden.group
[~ state]
=, resource.upd
=^ update listening
^- (quip card _listening)
?: (~(has in listening) app-path)
[~ listening]
:- [(send-update %watch app-path)]~
(~(put in listening) app-path)
=^ cards state
(listen-to-group app-path group-path.upd)
[(weld update cards) state]
::
%remove
?> =(%link app-name.resource.upd)
=? listening
?=(~ (groups-from-resource:md %link app-path.resource.upd))
(~(del in listening) app-path.resource.upd)
(leave-from-group app-path.resource.upd group-path.upd)
==
::
:: groups subscriptions
::
++ watch-groups
^- card
[%pass /groups %agent [our.bowl %group-store] %watch /groups]
::
++ take-groups-sign
|= =sign:agent:gall
^- (quip card _state)
?- -.sign
%poke-ack ~|([dap.bowl %unexpected-poke-ack /groups] !!)
%kick [[watch-groups]~ state]
::
%watch-ack
?~ p.sign [~ state]
=/ =tank
:- %leaf
"{(trip dap.bowl)} failed subscribe to groups. very wrong!"
%- (slog tank u.p.sign)
[~ state]
::
%fact
=* mark p.cage.sign
=* vase q.cage.sign
?+ mark ~|([dap.bowl %unexpected-mark mark] !!)
%group-initial [~ state] ::NOTE initial handled using metadata
%group-update (handle-group-update !<(update:group-store vase))
==
==
::
++ handle-group-update
|= upd=update:group-store
^- (quip card _state)
?. ?=(?(%add-members %initial-group %remove-members) -.upd)
[~ state]
=/ =path
(en-path:resource resource.upd)
=/ socs=(list app-path)
(app-paths-from-group:md %link path)
=/ whos=(list ship)
?- -.upd
%add-members ~(tap in ships.upd)
%remove-members ~(tap in ships.upd)
%initial-group ~(tap in members.group.upd)
==
=| cards=(list card)
|-
=* loop-socs $
?~ socs [cards state]
?. (~(has in listening) i.socs)
loop-socs(socs t.socs)
|-
=* loop-whos $
?~ whos loop-socs(socs t.socs)
=^ caz state
?. ?=(%remove-members -.upd)
(listen-to-peer i.socs path i.whos)
?: =(our.bowl i.whos)
(handle-listen-action %leave i.socs)
(leave-from-peer i.socs path i.whos)
loop-whos(whos t.whos, cards (weld cards caz))
::
:: link subscriptions
::
++ listen-to-group
|= [=app-path =group-path]
^- (quip card _state)
=/ peers=(list ship)
~| group-path
%~ tap in
(members-from-path:grp group-path)
=| cards=(list card)
|-
?~ peers [cards state]
=^ caz state
(listen-to-peer app-path group-path i.peers)
$(peers t.peers, cards (weld cards caz))
::
++ leave-from-group
|= [=app-path =group-path]
^- (quip card _state)
=/ peers=(list ship)
%~ tap in
(members-from-path:grp group-path)
=| cards=(list card)
|-
?~ peers [cards state]
=^ caz state
(leave-from-peer app-path group-path i.peers)
$(peers t.peers, cards (weld cards caz))
::
++ listen-to-peer
|= [=app-path =group-path who=ship]
^- (quip card _state)
?: =(our.bowl who)
[~ state]
:_ =- state(reasoning -)
(~(put ju reasoning) [who app-path] group-path)
:- (prod-other-listener who app-path)
?^ (~(get ju reasoning) [who app-path])
~
(start-link-subscriptions who app-path)
::
++ leave-from-peer
|= [=app-path =group-path who=ship]
^- (quip card _state)
?: =(our.bowl who)
[~ state]
=. reasoning (~(del ju reasoning) [who app-path] group-path)
::NOTE leaving is always safe, so we just do it unconditionally
(end-link-subscriptions who app-path)
::
++ start-link-subscriptions
|= [=ship =app-path]
^- (list card)
:~ (start-link-subscription %local-pages ship app-path)
(start-link-subscription %annotations ship app-path)
==
::
++ start-link-subscription
|= =target
^- card
:* %pass
[%links (target-to-wire target)]
%agent
[who.target %link-proxy-hook]
%watch
?- what.target
%local-pages [what where]:target
%annotations [what %$ where]:target
==
==
::
++ end-link-subscriptions
|= [who=ship where=path]
^- (quip card _state)
=. retry-timers (~(del by retry-timers) [%local-pages who where])
=. retry-timers (~(del by retry-timers) [%annotations who where])
:_ state
|^ ~[(end %local-pages) (end %annotations)]
::
++ end
|= what=what-target
:* %pass
[%links (target-to-wire what who where)]
%agent
[who %link-proxy-hook]
%leave
~
==
--
::
++ prod-other-listener
|= [who=ship where=path]
^- card
:* %pass
[%prod (scot %p who) where]
%agent
[who %link-listen-hook]
%poke
%link-listen-poke
!>(where)
==
::
++ take-link-sign
|= [=target =sign:agent:gall]
^- (quip card _state)
?- -.sign
%poke-ack ~|([dap.bowl %unexpected-poke-ack /links target] !!)
%kick [[(start-link-subscription target)]~ state]
::
%watch-ack
?~ p.sign
=. retry-timers (~(del by retry-timers) target)
[~ state]
:: our subscription request got rejected,
:: most likely because our group definition is out of sync with theirs.
:: set timer for retry.
::
(start-retry target)
::
%fact
=* mark p.cage.sign
=* vase q.cage.sign
?+ mark ~|([dap.bowl %unexpected-mark mark] !!)
%link-initial
%- handle-link-initial
[who.target where.target !<(initial:store vase)]
::
%link-update
%- handle-link-update
[who.target where.target !<(update:store vase)]
==
==
::
++ start-retry
|= =target
^- (quip card _state)
=/ timer=@dr
%+ min ~h1
%+ mul 2
(~(gut by retry-timers) target ~s15)
=. retry-timers
(~(put by retry-timers) target timer)
:_ state
:_ ~
:* %pass
[%retry (target-to-wire target)]
[%arvo %b %wait (add now.bowl timer)]
==
::
++ take-retry
|= =target
^- (list card)
:: relevant: whether :who is still associated with resource :where
::
=; relevant=?
?. relevant ~
[(start-link-subscription target)]~
?. (~(has in listening) where.target)
|
?: %- ~(has by wex.bowl)
[[%links (target-to-wire target)] who.target %link-proxy-hook]
|
%+ lien (groups-from-resource:md %link where.target)
|= =group-path
^- ?
%. who.target
~(has in (members-from-path:grp group-path))
::
++ do-link-action
|= [=wire =action:store]
^- card
:* %pass
wire
%agent
[our.bowl %link-store]
%poke
%link-action
!>(action)
==
::
++ handle-link-initial
|= [who=ship where=path =initial:store]
^- (quip card _state)
?> =(src.bowl who)
?+ -.initial ~|([dap.bowl %unexpected-initial -.initial] !!)
%local-pages
=/ =pages (~(got by pages.initial) where)
(handle-link-update who where [%local-pages where pages])
::
%annotations
=/ urls=(list [=url =notes])
~(tap by (~(got by notes.initial) where))
=| cards=(list card)
|- ^- (quip card _state)
?~ urls [cards state]
=^ caz state
^- (quip card _state)
=, i.urls
(handle-link-update who where [%annotations where url notes])
$(urls t.urls, cards (weld cards caz))
==
::
++ handle-link-update
|= [who=ship where=path =update:store]
^- (quip card _state)
?> =(src.bowl who)
:_ state
?+ -.update ~|([dap.bowl %unexpected-update -.update] !!)
%local-pages
%+ turn pages.update
|= =page
%+ do-link-action
[%forward %local-page (scot %p who) where]
[%hear where who page]
::
%annotations
%+ turn notes.update
|= =note
^- card
%+ do-link-action
`wire`[%forward %annotation (scot %p who) where]
`action:store`[%read where url.update `comment`[who note]]
==
::
++ take-forward-sign
|= [=wire =sign:agent:gall]
^- (quip card _state)
~| [%unexpected-sign on=[%forward wire] -.sign]
?> ?=(%poke-ack -.sign)
?~ p.sign [~ state]
=/ =tank
:- %leaf
;: weld
(trip dap.bowl)
" failed to save submission from "
(spud wire)
==
%- (slog tank u.p.sign)
[~ state]
::
++ scry-for
|* [=mold =app-name =path]
.^ mold
%gx
(scot %p our.bowl)
app-name
(scot %da now.bowl)
(snoc `^path`path %noun)
==
++ on-agent on-agent:def
++ on-poke on-poke:def
++ on-arvo on-arvo:def
++ on-peek on-peek:def
++ on-watch on-watch:def
++ on-leave on-leave:def
++ on-fail on-fail:def
--

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@ -1,337 +1,41 @@
:: link-proxy-hook: make local pages available to foreign ships
:: link-proxy-hook: no longer in use
::
:: this is a "proxy" style hook, relaying foreign subscriptions into local
:: stores if permission conditions are met.
:: the patterns herein should one day be generalized into a proxy-hook lib.
::
:: this uses metadata-store to discover resources and their associated
:: groups. it sets the permission condition to be that a ship must be in a
:: group associated with the resource it's subscribing to.
:: we check this on-watch, but also subscribe to metadata & groups so that
:: we can kick subscriptions if needed (eg ship removed from group).
::
:: we deduplicate incoming subscriptions on the same path, ensuring we have
:: exactly one local subscription per unique incoming subscription path.
:: this comes at the cost of assuming that the store's initial response is
:: whatever's returned by the scry at that path, but perhaps that should
:: become part of the stores standard anyway.
::
:: when adding support for new paths, the only things you'll likely want
:: to touch are +permitted, +initial-response, & +kick-proxies.
::
/- *link, *metadata-store, *group
/+ metadata, default-agent, verb, dbug, group-store, grpl=group,
resource, store=link-store
/+ default-agent, verb, dbug
~% %link-proxy-hook-top ..is ~
|%
+$ state-0
$: %0
::TODO we use this to detect "first sub started" and "last sub left",
:: but can't we use [wex sup]:bowl for that?
active=(map path (set ship))
==
+$ state-1
$: %1
active=(map path (set ship))
==
::
+$ versioned-state
$% state-0
state-1
$% [%0 *]
[%1 *]
[%2 ~]
==
::
+$ card card:agent:gall
--
::
=| state-1
=| [%2 ~]
=* state -
::
%- agent:dbug
%+ verb |
^- agent:gall
=<
|_ =bowl:gall
+* this .
do ~(. +> bowl)
def ~(. (default-agent this %&) bowl)
::
++ on-init
^- (quip card _this)
:_ this
~[watch-groups:do watch-metadata:do]
::
++ on-save !>(state)
++ on-load
|= old-vase=vase
^- (quip card _this)
=/ old
!<(versioned-state old-vase)
?- -.old
%1 [~ this(state old)]
::
%0
:_ this(state [%1 +.old])
:~ [%pass /groups %agent [our.bowl %group-store] %leave ~]
watch-groups:do
==
==
::
++ on-watch
|= =path
^- (quip card _this)
:: the local ship should just use link-store directly
::TODO do we want to allow this anyway, to avoid client-side target checks?
::
?< (team:title [our src]:bowl)
?> (permitted:do src.bowl path)
=^ cards state
(start-proxy:do src.bowl path)
[cards this]
::
++ on-leave
|= =path
^- (quip card _this)
=^ cards state
(stop-proxy:do src.bowl path)
[cards this]
::
++ on-agent
|= [=wire =sign:agent:gall]
^- (quip card _this)
?: ?=([%groups ~] wire)
=^ cards state
(take-groups-sign:do sign)
[cards this]
?: ?=([%proxy ^] wire)
=^ cards state
(handle-proxy-sign t.wire sign)
[cards this]
~| [dap.bowl %weird-wire wire]
!!
::
++ on-poke on-poke:def
++ on-peek on-peek:def
++ on-arvo on-arvo:def
++ on-fail on-fail:def
--
::
|_ =bowl:gall
+* md ~(. metadata bowl)
grp ~(. grpl bowl)
+* this .
def ~(. (default-agent this %&) bowl)
::
:: permissions
++ on-init on-init:def
++ on-save !>(state)
++ on-load
|= old-vase=vase
^- (quip card _this)
:_ this
[%pass /groups %agent [our.bowl %group-store] %leave ~]~
::
++ permitted
|= [who=ship =path]
^- ?
:: we only expose /local-pages and /annotations,
:: to ships in the groups associated with the resource.
:: (no url-specific annotations subscriptions, either.)
::
=/ target=(unit ^path)
?: ?=([%local-pages ^] path)
`t.path
?: ?=([%annotations ~ ^] path)
`t.t.path
~
?~ target |
%+ lien (groups-from-resource:md %link u.target)
|= =group-path
^- ?
(~(has in (members-from-path:grp group-path)) who)
::
++ kick-revoked-permissions
|= [=path who=(list ship)]
^- (list card)
%+ murn who
|= =ship
^- (unit card)
:: no need to remove to ourselves
::
?: =(our.bowl ship) ~
?: (permitted ship path) ~
`(kick-proxies ship path)
::
:: metadata subscription
::
++ watch-metadata
^- card
[%pass /metadata %agent [our.bowl %metadata-store] %watch /app-name/link]
::
++ take-metadata-sign
|= =sign:agent:gall
^- (quip card _state)
?- -.sign
%poke-ack ~|([dap.bowl %unexpected-poke-ack /metadata] !!)
%kick [[watch-metadata]~ state]
::
%watch-ack
?~ p.sign [~ state]
=/ =tank
:- %leaf
"{(trip dap.bowl)} failed subscribe to metadata store. very wrong!"
%- (slog tank u.p.sign)
[~ state]
::
%fact
=* mark p.cage.sign
=* vase q.cage.sign
?. ?=(%metadata-update mark)
~| [dap.bowl %unexpected-mark mark]
!!
%- handle-metadata-update
!<(metadata-update vase)
==
::
++ handle-metadata-update
|= upd=metadata-update
^- (quip card _state)
:_ state
?. ?=(%remove -.upd) ~
?> =(%link app-name.resource.upd)
:: if a group is no longer associated with a resource,
:: we need to re-check permissions for everyone in that group.
::
%+ kick-revoked-permissions
app-path.resource.upd
%~ tap in
(members-from-path:grp group-path.upd)
::
:: groups subscription
::TODO largely copied from link-listen-hook. maybe make a store-listener lib?
::
++ watch-groups
^- card
[%pass /groups %agent [our.bowl %group-store] %watch /groups]
::
++ take-groups-sign
|= =sign:agent:gall
^- (quip card _state)
?- -.sign
%poke-ack ~|([dap.bowl %unexpected-poke-ack /groups] !!)
%kick [[watch-groups]~ state]
::
%watch-ack
?~ p.sign [~ state]
=/ =tank
:- %leaf
"{(trip dap.bowl)} failed subscribe to group store. very wrong!"
%- (slog tank u.p.sign)
[~ state]
::
%fact
=* mark p.cage.sign
=* vase q.cage.sign
?+ mark ~|([dap.bowl %unexpected-mark mark] !!)
%group-initial [~ state]
%group-update (handle-group-update !<(update:group-store vase))
==
==
::
++ handle-group-update
|= upd=update:group-store
^- (quip card _state)
:_ state
?. ?=(%remove-members -.upd) ~
:: if someone was removed from a group, find all link resources associated
:: with that group, then kick their subscriptions if they're no longer
::
%- zing
%+ turn (app-paths-from-group:md %link (en-path:resource resource.upd))
|= =app-path
^- (list card)
%+ kick-revoked-permissions
app-path
~(tap in ships.upd)
::
:: proxy subscriptions
::
++ kick-proxies
|= [who=ship =path]
^- card
=- [%give %kick - `who]
:~ [%local-pages path]
[%annotations %$ path]
==
::
++ handle-proxy-sign
|= [=wire =sign:agent:gall]
^- (quip card _state)
?- -.sign
%poke-ack ~|([dap.bowl %unexpected-poke-ack wire] !!)
%fact [[%give %fact ~[wire] cage.sign]~ state]
%kick [[(proxy-pass-link-store wire %watch wire)]~ state]
::
%watch-ack
?~ p.sign [~ state]
=/ =tank
:- %leaf
"{(trip dap.bowl)} failed subscribe to link-store. very wrong!"
%- (slog tank u.p.sign)
[~ state]
==
::
++ proxy-pass-link-store
|= [=path =task:agent:gall]
^- card
:* %pass
[%proxy path]
%agent
[our.bowl %link-store]
task
==
::
++ initial-response
|= =path
^- card
=; =initial:store
[%give %fact ~ %link-initial !>(initial)]
?+ path !!
[%local-pages ^]
[%local-pages (scry-for (map ^path pages) %link-store path)]
::
[%annotations %$ ^]
[%annotations (scry-for (per-path-url notes) %link-store path)]
==
::
++ start-proxy
|= [who=ship =path]
^- (quip card _state)
:_ state(active (~(put ju active) path who))
:_ ~
:: if we already have a local subscription open,
::
?. =(~ (~(get ju active) path))
:: gather the initial response ourselves, and send that.
::
(initial-response path)
:: else, open a local subscription,
:: sending outward its initial response when we hear it.
::
(proxy-pass-link-store path %watch path)
::
++ stop-proxy
|= [who=ship =path]
^- (quip card _state)
=. active (~(del ju active) path who)
:_ state
:: if there are still subscriptions remaining, do nothing.
::
?. =(~ (~(get ju active) path)) ~
:: else, close the local subscription.
::
[(proxy-pass-link-store path %leave ~)]~
::
:: helpers
::
++ scry-for
|* [=mold =app-name =path]
.^ mold
%gx
(scot %p our.bowl)
app-name
(scot %da now.bowl)
(snoc `^path`path %noun)
==
++ on-watch on-watch:def
++ on-leave on-leave:def
++ on-agent on-agent:def
++ on-poke on-poke:def
++ on-peek on-peek:def
++ on-arvo on-arvo:def
++ on-fail on-fail:def
--