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354 lines
8.3 KiB
Plaintext
354 lines
8.3 KiB
Plaintext
:: lib/pull-hook: helper for creating a push hook
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::
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:: lib/pull-hook is a helper for automatically pulling data from a
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:: corresponding push-hook to a store.
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::
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:: ## Interfacing notes:
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::
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:: The inner door may interact with the library by producing cards.
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:: Do not pass any cards on a wire beginning with /helper as these
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:: wires are reserved by this library. Any watches/pokes/peeks not
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:: listed below will be routed to the inner door.
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::
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:: ## Subscription paths
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::
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:: /tracking: The set of resources we are pulling
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::
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:: ## Pokes
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::
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:: %pull-hook-action: Add/remove a resource from pulling.
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::
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/- *pull-hook
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/+ default-agent, resource
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::
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::
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|%
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+$ card card:agent:gall
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::
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:: $config: configuration for the pull hook
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::
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:: .store-name: name of the store to send subscription updates to.
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:: .update-mark: mark that updates will be tagged with
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:: .push-hook-name: name of the corresponding push-hook
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::
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+$ config
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$: store-name=term
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update=mold
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update-mark=term
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push-hook-name=term
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==
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::
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:: $base-state-0: state for the pull hook
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::
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:: .tracking: a map of resources we are pulling, and the ships that
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:: we are pulling them from.
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:: .inner-state: state given to internal door
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::
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+$ base-state-0
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$: tracking=(map resource ship)
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inner-state=vase
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==
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::
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+$ state-0 [%0 base-state-0]
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::
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+$ state-1 [%1 base-state-0]
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::
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+$ versioned-state
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$% state-0
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state-1
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==
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::
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++ default
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|* [pull-hook=* =config]
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|_ =bowl:gall
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::
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++ on-pull-nack
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|= [=resource =tang]
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=/ =tank leaf+"subscribe failed from {<dap.bowl>} for {<resource>}"
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%- (slog tank tang)
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[~ pull-hook]
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::
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++ on-pull-kick
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|= =resource
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*(unit path)
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--
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::
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++ pull-hook
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|* config
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$_ ^|
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|_ bowl:gall
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:: +on-pull-nack: handle failed pull subscription
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::
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:: This arm is called when a pull subscription fails. lib/pull-hook
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:: will automatically delete the resource from .tracking by the
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:: time this arm is called.
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::
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++ on-pull-nack
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|~ [resource tang]
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*[(list card) _^|(..on-init)]
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:: +on-pull-kick: produce any additional resubscribe path
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::
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:: If non-null, the produced path is appended to the original
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:: subscription path. This should be used to encode extra
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:: information onto the path in order to reduce the payload of a
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:: kick and resubscribe.
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::
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:: If null, a resubscribe is not attempted
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::
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++ on-pull-kick
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|~ resource
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*(unit path)
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::
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:: from agent:gall
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++ on-init
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*[(list card) _^|(..on-init)]
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::
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++ on-save
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*vase
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::
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++ on-load
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|~ vase
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*[(list card) _^|(..on-init)]
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::
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++ on-poke
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|~ [mark vase]
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*[(list card) _^|(..on-init)]
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::
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++ on-watch
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|~ path
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*[(list card) _^|(..on-init)]
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::
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++ on-leave
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|~ path
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*[(list card) _^|(..on-init)]
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::
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++ on-peek
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|~ path
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*(unit (unit cage))
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::
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++ on-agent
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|~ [wire sign:agent:gall]
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*[(list card) _^|(..on-init)]
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::
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++ on-arvo
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|~ [wire sign-arvo]
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*[(list card) _^|(..on-init)]
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::
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++ on-fail
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|~ [term tang]
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*[(list card) _^|(..on-init)]
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--
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++ agent
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|* =config
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|= =(pull-hook config)
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=| state-1
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=* state -
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^- agent:gall
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=<
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|_ =bowl:gall
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+* this .
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og ~(. pull-hook bowl)
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hc ~(. +> bowl)
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def ~(. (default-agent this %|) bowl)
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++ on-init
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^- [(list card:agent:gall) agent:gall]
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=^ cards pull-hook
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on-init:og
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[cards this]
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++ on-load
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|= =old=vase
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=/ old
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!<(versioned-state old-vase)
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=| cards=(list card:agent:gall)
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|^
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?- -.old
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%1
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=^ og-cards pull-hook
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(on-load:og inner-state.old)
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[(weld cards og-cards) this(state old)]
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::
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%0
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%_ $
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-.old %1
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::
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cards
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(weld cards (missing-subscriptions tracking.old))
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==
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==
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++ missing-subscriptions
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|= tracking=(map resource ship)
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^- (list card:agent:gall)
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%+ murn
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~(tap by tracking)
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|= [rid=resource =ship]
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^- (unit card:agent:gall)
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=/ =path
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resource+(en-path:resource rid)
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=/ =wire
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(make-wire pull+path)
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?: (~(has by wex.bowl) [wire ship push-hook-name.config])
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~
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`[%pass wire %agent [ship push-hook-name.config] %watch path]
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--
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::
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++ on-save
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^- vase
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=. inner-state
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on-save:og
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!>(state)
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++ on-poke
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|= [=mark =vase]
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^- [(list card:agent:gall) agent:gall]
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?> (team:title our.bowl src.bowl)
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?. =(mark %pull-hook-action)
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=^ cards pull-hook
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(on-poke:og mark vase)
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[cards this]
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=^ cards state
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(poke-hook-action:hc !<(action vase))
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[cards this]
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::
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++ on-watch
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|= =path
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^- [(list card:agent:gall) agent:gall]
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?> (team:title our.bowl src.bowl)
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?. ?=([%tracking ~] path)
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=^ cards pull-hook
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(on-watch:og path)
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[cards this]
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:_ this
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~[give-update]
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::
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++ on-agent
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|= [=wire =sign:agent:gall]
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^- [(list card:agent:gall) agent:gall]
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?. ?=([%helper %pull-hook @ *] wire)
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=^ cards pull-hook
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(on-agent:og wire sign)
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[cards this]
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?. ?=([%pull %resource *] t.t.wire)
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(on-agent:def wire sign)
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=/ rid=resource
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(de-path:resource t.t.t.t.wire)
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?+ -.sign (on-agent:def wire sign)
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%kick
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=/ pax=(unit path)
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(on-pull-kick:og rid)
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?^ pax
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:_ this
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~[(watch-resource:hc rid u.pax)]
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=. tracking
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(~(del by tracking) rid)
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:_ this
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~[give-update]
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::
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%watch-ack
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?~ p.sign
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[~ this]
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=. tracking
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(~(del by tracking) rid)
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=^ cards pull-hook
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(on-pull-nack:og rid u.p.sign)
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:_ this
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[give-update cards]
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::
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%fact
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?. =(update-mark.config p.cage.sign)
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=^ cards pull-hook
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(on-agent:og wire sign)
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[cards this]
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:_ this
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~[(update-store:hc q.cage.sign)]
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==
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++ on-leave
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|= =path
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^- [(list card:agent:gall) agent:gall]
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=^ cards pull-hook
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(on-leave:og path)
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[cards this]
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::
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++ on-arvo
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|= [=wire =sign-arvo]
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^- [(list card:agent:gall) agent:gall]
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=^ cards pull-hook
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(on-arvo:og wire sign-arvo)
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[cards this]
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++ on-fail
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|= [=term =tang]
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^- [(list card:agent:gall) agent:gall]
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=^ cards pull-hook
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(on-fail:og term tang)
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[cards this]
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++ on-peek
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|= =path
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^- (unit (unit cage))
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(on-peek:og path)
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--
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|_ =bowl:gall
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+* og ~(. pull-hook bowl)
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::
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++ poke-hook-action
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|= =action
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^- [(list card:agent:gall) _state]
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|^
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?- -.action
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%add (add +.action)
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%remove (remove +.action)
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==
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++ add
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|= [=ship =resource]
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~| resource
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?< |(=(our.bowl ship) =(our.bowl entity.resource))
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?: (~(has by tracking) resource)
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[~ state]
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=. tracking
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(~(put by tracking) resource ship)
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:_ state
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~[(watch-resource resource /)]
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::
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++ remove
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|= =resource
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:- ~[(leave-resource resource)]
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state(tracking (~(del by tracking) resource))
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--
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::
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++ leave-resource
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|= rid=resource
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^- card
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=/ =ship
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(~(got by tracking) rid)
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=/ =wire
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(make-wire pull+resource+(en-path:resource rid))
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[%pass wire %agent [ship push-hook-name.config] %leave ~]
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++ watch-resource
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|= [rid=resource pax=path]
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^- card
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=/ =ship
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(~(got by tracking) rid)
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=/ =path
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(welp resource+(en-path:resource rid) pax)
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=/ =wire
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(make-wire pull+path)
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[%pass wire %agent [ship push-hook-name.config] %watch path]
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::
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++ make-wire
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|= =wire
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^+ wire
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%+ weld
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/helper/pull-hook
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wire
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::
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++ give-update
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^- card
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[%give %fact ~[/tracking] %pull-hook-update !>(tracking)]
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::
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++ update-store
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|= =vase
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^- card
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=/ =wire
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(make-wire /store)
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[%pass wire %agent [our.bowl store-name.config] %poke update-mark.config vase]
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--
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--
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