medplum / medplum / 32054444841

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Commit Message

`getIdentifierByType` and MRN support (#10201)

* feat(core): add getIdentifierByType and MRN identifier type

Add `getIdentifierByType(resource, type)`, which looks up an identifier by
`Identifier.type.coding[]` rather than by `Identifier.system`. `getIdentifier`
only keys on the assigning system, so there was no way to ask "which of these
identifiers is the MRN?" without knowing the assigner up front.

Also adds the `HL7_V2_0203` code system constant and the `MRN_IDENTIFIER_TYPE`
coding built on it.

Matching requires both the system and the code of the type coding: the same
code means different things in different code systems, so code-only matching
would be ambiguous.

Signed-off-by: Philip Knott <filupnot@proton.me>

* fix(core): match any type coding in getIdentifierByType

getCodeBySystem only inspects the first coding matching the system, so an
Identifier.type carrying two codings from the same code system would miss a
lookup for the second one. Match with some() over all codings instead.

Signed-off-by: Philip Knott <filupnot@proton.me>

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Signed-off-by: Philip Knott <filupnot@proton.me>

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