urbit/pkg/arvo/lib/metadata.hoon

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:: metadata: helpers for getting data from the metadata-store
::
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/- store=metadata-store
/+ resource, grpl=group
::
|_ =bowl:gall
+* grp ~(. grpl bowl)
::
++ get-preview
|= rid=resource
|^ ^- group-preview:store
?> (can-join:grp rid src.bowl)
=/ members
~(wyt in (members:grp rid))
=/ =metadatum:store
(need (peek-metadatum %groups rid))
[rid channels members channel-count metadatum]
::
++ channels
%- ~(gas by *associations:store)
%+ scag 5
%+ skim ~(tap by (app-metadata-for-group rid %graph))
|=([=md-resource:store group=resource =metadatum:store] preview.metadatum)
::
++ channel-count
~(wyt by (app-metadata-for-group rid %graph))
--
::
++ resource-for-update
|= =vase
^- (list resource)
=/ =update:store !<(update:store vase)
?. ?=(?(%add %remove %initial-group) -.update) ~
~[group.update]
::
++ app-paths-from-group
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|= [=app-name:store group=resource]
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^- (list resource)
%+ murn
%~ tap in
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=- (~(gut by -) group ~)
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.^ (jug resource md-resource:store)
%gy
(scot %p our.bowl)
%metadata-store
(scot %da now.bowl)
/group-indices
==
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|= =md-resource:store
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^- (unit resource)
?. =(app-name.md-resource app-name) ~
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`resource.md-resource
::
++ app-metadata-for-group
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|= [group=resource =app-name:store]
^- associations:store
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=/ =associations:store
(metadata-for-group group)
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%- ~(gas by *associations:store)
%+ skim ~(tap by associations)
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|= [=md-resource:store association:store]
=(app-name app-name.md-resource)
::
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++ metadata-for-group
|= group=resource
^- associations:store
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.^ associations:store
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%gx (scot %p our.bowl) %metadata-store (scot %da now.bowl)
%group (snoc (en-path:resource group) %noun)
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==
::
++ md-resources-from-group
|= group=resource
^- (set md-resource:store)
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=- (~(get ju -) group)
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.^ (jug resource md-resource:store)
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%gy
(scot %p our.bowl)
%metadata-store
(scot %da now.bowl)
/group-indices
==
::
++ peek-association
|= [app-name=term rid=resource]
^- (unit association:store)
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.^ (unit association:store)
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%gx (scot %p our.bowl) %metadata-store (scot %da now.bowl)
%metadata app-name (snoc (en-path:resource rid) %noun)
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==
::
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++ peek-metadatum
|= =md-resource:store
^- (unit metadatum:store)
%+ bind (peek-association md-resource)
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|=(association:store metadatum)
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::
++ peek-group
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|= =md-resource:store
^- (unit resource)
%+ bind (peek-association md-resource)
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|=(association:store group)
::
++ graphs-of-group
|= group=resource
=/ =associations:store
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(metadata-for-group group)
%+ murn ~(tap in ~(key by associations))
|= [=app-name:store rid=resource]
?.(=(%graph app-name) ~ `rid)
--