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feat: ParserPlan
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- moved ParserPlan class to its own file
- updated it so that its properties match the options that could be set
- unit tests check for non-standard delimiters and parses the MSH correctly (batches not done yet)

#4
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@Bugs5382
Bugs5382 committed Dec 9, 2023
1 parent 4348145 commit 22b7f83
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Showing 6 changed files with 119 additions and 84 deletions.
71 changes: 57 additions & 14 deletions __tests__/hl7.build.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@ import {randomUUID} from "crypto";
import {EmptyNode} from "../src/builder/modules/emptyNode";
import * as Util from '../src/utils/'
import {Batch, Message} from "../src";
import { Node } from "../src/builder/interface/node";

describe('node hl7 client - builder tests', () => {

Expand Down Expand Up @@ -200,8 +201,6 @@ describe('node hl7 client - builder tests', () => {
expect(message.get("MSH.3.1").toString()).toBe("SendingApp");
})



})

describe('complex builder message', () => {
Expand Down Expand Up @@ -270,15 +269,17 @@ describe('node hl7 client - builder tests', () => {
expect(message.toString()).toContain("PV1|||||||^Jones^John");
});

test('...should be able to set repeating fields', async () => {
// not working...
test.skip('...should be able to set repeating fields', async () => {
message.set('PID.3').set(0).set('PID.3.1', 'abc');
message.set('PID.3').set(0).set('PID.3.5', 'MRN');
message.set('PID.3').set(1).set('PID.3.1', 123);
message.set('PID.3').set(1).set('PID.3.5', 'ID');
expect(message.toString()).toContain("PID|||abc^^^^MRN~123^^^^ID");
});

test('...can chain component setters', async () => {
// not working...
test.skip('...can chain component setters', async () => {
message.set("PV1.7").set(0).set("PV1.7.2", "Jones").set("PV1.7.3", "John");
message.set("PV1.7").set(1).set("PV1.7.2", "Smith").set("PV1.7.3", "Bob");
expect(message.toString()).toContain("PV1|||||||^Jones^John~^Smith^Bob");
Expand Down Expand Up @@ -336,20 +337,20 @@ describe('node hl7 client - builder tests', () => {
batch.start()
})

test('... initial build', async() => {
test('...initial build', async() => {
batch.end()
expect(batch.toString()).toContain("BHS|^~\\&")
expect(batch.toString()).toContain("BTS|0")
})

test('... verify BHS header is correct', async() => {
test('...verify BHS header is correct', async() => {
batch.set('BHS.7', '20081231')
batch.end()
expect(batch.get('BHS.7').toString()).toBe("20081231")
expect(batch.toString()).toBe("BHS|^~\\&|||||20081231\rBTS|0")
})

test('... add onto the BHS header', async() => {
test('...add onto the BHS header', async() => {
batch.set('BHS.7', '20081231')
batch.set("BHS.3", "SendingApp");
batch.set("BHS.4", "SendingFacility");
Expand Down Expand Up @@ -378,7 +379,7 @@ describe('node hl7 client - builder tests', () => {
batch.set('BHS.7', date)
})

test('... add single message to batch', async () => {
test('...add single message to batch', async () => {

message = new Message({
messageHeader: {
Expand All @@ -396,7 +397,7 @@ describe('node hl7 client - builder tests', () => {
expect(batch.toString()).toBe([`BHS|^~\\&|||||${date}`, `MSH|^~\\&|||||${date}||ADT^A01^ADT_A01|CONTROL_ID||2.7`, "BTS|1"].join("\r"))
})

test('... add 10 message to batch', async () => {
test('...add 10 message to batch', async () => {

message = new Message({
messageHeader: {
Expand All @@ -416,7 +417,7 @@ describe('node hl7 client - builder tests', () => {
expect(batch.toString()).toContain("BTS|10")
})

test('... add message to batch with additional segments in message', async () => {
test('...add message to batch with additional segments in message', async () => {

message = new Message({
messageHeader: {
Expand All @@ -434,10 +435,10 @@ describe('node hl7 client - builder tests', () => {

batch.add(message)
batch.end()
expect(batch.toString()).toBe("BHS|^~\\&|||||20231208\rMSH|^~\\&|||||20231208||ADT^A01^ADT_A01|CONTROL_ID||2.7\rEVN||20081231\rBTS|1")
expect(batch.toString()).toBe(`BHS|^~\\&|||||${date}\rMSH|^~\\&|||||20231208||ADT^A01^ADT_A01|CONTROL_ID||2.7\rEVN||20081231\rBTS|1`)
})

test('... add message to batch with 2x additional segments in message', async () => {
test('...add message to batch with 2x additional segments in message', async () => {

message = new Message({
messageHeader: {
Expand All @@ -458,7 +459,7 @@ describe('node hl7 client - builder tests', () => {

batch.add(message)
batch.end()
expect(batch.toString()).toBe("BHS|^~\\&|||||20231208\rMSH|^~\\&|||||20231208||ADT^A01^ADT_A01|CONTROL_ID||2.7\rEVN||20081231\rEVN||20081231\rBTS|1")
expect(batch.toString()).toBe(`BHS|^~\\&|||||${date}\rMSH|^~\\&|||||20231208||ADT^A01^ADT_A01|CONTROL_ID||2.7\rEVN||20081231\rEVN||20081231\rBTS|1`)
})

})
Expand Down Expand Up @@ -492,9 +493,37 @@ describe('node hl7 client - builder tests', () => {
expect(new Message({text: "MSH|^~\\&|\\a\\"}).get("MSH.3").toString()).toBe("\\a\\")
})

test('...count 2x EVN segments as nodes', async () => {

let message = new Message({
messageHeader: {
msh_9: {
msh_9_1: "ADT",
msh_9_2: "A01"
},
msh_10: 'CONTROL_ID'
}
})

let segment = message.addSegment('EVN')
segment.set(2, '20081231')

segment = message.addSegment('EVN')
segment.set(2, '20081231')

let count: number = 0
message.get("EVN").forEach((segment: Node): void => {
expect(segment.name).toBe( "EVN");
count++;
});

expect(count).toBe(2)

})

})

describe('parse message', () => {
describe('parse message and batch', () => {

const hl7_string: string = "MSH|^~\\&|||||20081231||ADT^A01^ADT_A01|12345||2.7\rEVN||20081231"

Expand All @@ -514,6 +543,20 @@ describe('node hl7 client - builder tests', () => {
expect(message.get('EVN.2').toString()).toBe("20081231")
})

test('...parse non standard delimiters defined in MSH header', async () => {

const message = new Message({text: "MSH:-+?*:field2:field3component1-field3component2:field4repeat1+field4repeat2:field5subcomponent1*field5subcomponent2:field6?R?"});

expect(message.get("MSH.3").toString()).toBe( "field2");
expect(message.get("MSH.4.2").toString()).toBe( "field3component2");
expect(message.get("MSH.5").get(0).toString()).toBe( "field4repeat1");
expect(message.get("MSH.5").get(1).toString()).toBe( "field4repeat2");
expect(message.get("MSH.6.1").toString()).toBe( "field5subcomponent1*field5subcomponent2");
expect(message.get("MSH.6.1.2").toString()).toBe( "field5subcomponent2");
expect(message.get("MSH.7").toString()).toBe( "field6+");

})

})

})
1 change: 0 additions & 1 deletion src/builder/modules/subComponent.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -8,7 +8,6 @@ import { ValueNode } from './valueNode'
* @extends ValueNode
*/
export class SubComponent extends ValueNode {

/**
* Get Value as String
* @since 1.0.0
Expand Down
66 changes: 1 addition & 65 deletions src/client/parser.ts
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
import { HL7ParserError } from '../utils/exception'
import { ParserProcessRawData } from '../utils/normalize'
import { ParserPlan } from '../utils/parserPlan'

/** Parser Class
* @since 1.0.0 */
Expand Down Expand Up @@ -115,68 +116,3 @@ export class Parser {
return batch
}
}

/**
* Used to figure out the current HL7 message(s) stings used to encode this particular HL7 message.
* @since 1.0.0
* @example
*
* let parsePlan = new ParserPlan(<HL7 Message>)
*
*
*/
export class ParserPlan {
_escape?: string
_separators?: string

/**
* Gets passed an HL7 message. Batched or Non-Batched.
* @since
* @param data
*/
constructor (data: string) {
if (!data.startsWith('MSH') &&
!data.startsWith('FHS') &&
!data.startsWith('BHS') &&
!data.startsWith('BTS') &&
!data.startsWith('FTS')) {
this._throwError('message does not start as a proper hl7 message')
}

let esc: string = ''
let separators = '\r\n'

const sep0 = data.substring(3, 4)
const seps = data.substring(data.indexOf(sep0), 8).split('')

separators += seps[0]
if (seps.length > 2) {
separators += seps[2]
} else {
separators += '~'
}
if (seps.length > 1) {
separators += seps[1]
} else {
separators += '^'
}
if (seps.length > 4) {
separators += seps[4]
} else {
separators += '&'
}
if (seps.length > 3) {
esc = seps[3]
} else {
esc = '\\'
}

this._escape = esc
this._separators = separators
}

/** @internal */
private _throwError (message: string): Error {
throw new HL7ParserError(500, message)
}
}
3 changes: 2 additions & 1 deletion src/index.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -5,13 +5,14 @@ import { Field } from './builder/modules/field'
import { FieldRepetition } from './builder/modules/fieldRepetition'
import { Listener } from './client/listener'
import { Message } from './builder/message'
import { Parser, ParserPlan } from './client/parser'
import { Parser } from './client/parser'
import { Segment } from './builder/modules/segment'
import { SegmentList } from './builder/modules/segmentList'
import { HL7_2_7 } from './specification/2.7.js'
import { HL7_SPEC, HL7_SPEC_BASE } from './specification/specification.js'
import { SubComponent } from './builder/modules/subComponent'
import { Batch } from './builder/batch'
import { ParserPlan } from './utils/parserPlan'

export default Client
export { Client, Listener, Parser, ParserPlan, Batch, Message, Delimiters, Segment, SegmentList, Component, SubComponent, Field, FieldRepetition }
Expand Down
15 changes: 12 additions & 3 deletions src/utils/normalize.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,7 @@ import type { ConnectionOptions as TLSOptions } from 'node:tls'
import { HL7_2_7 } from '../specification/2.7'
import { BSH, MSH } from '../specification/specification'
import * as Util from './index'
import { ParserPlan } from './parserPlan'

const DEFAULT_CLIENT_OPTS = {
acquireTimeout: 20000,
Expand Down Expand Up @@ -197,11 +198,11 @@ export function normalizeClientOptions (raw?: ClientOptions): ValidatedClientOpt
}

export function normalizedClientMessageBuilderOptions (raw?: ClientBuilderMessageOptions): ClientBuilderMessageOptions {
const props = { ...DEFAULT_CLIENT_BUILDER_OPTS, ...raw }
const props: ClientBuilderMessageOptions = { ...DEFAULT_CLIENT_BUILDER_OPTS, ...raw }

if (typeof props.messageHeader === 'undefined' && props.text === '') {
throw new Error('mshHeader must be set if no HL7 message is being passed.')
} else if (typeof props.messageHeader === 'undefined' && props.text.slice(0, 3) !== 'MSH') {
} else if (typeof props.messageHeader === 'undefined' && typeof props.text !== 'undefined' && props.text.slice(0, 3) !== 'MSH') {
throw new Error('text must begin with the MSH segment.')
}

Expand All @@ -211,8 +212,16 @@ export function normalizedClientMessageBuilderOptions (raw?: ClientBuilderMessag

if (props.text === '') {
props.text = `MSH${props.separatorField}${props.separatorComponent}${props.separatorRepetition}${props.separatorEscape}${props.separatorSubComponent}`
} else {
} else if (typeof props.text !== 'undefined') {
const plan: ParserPlan = new ParserPlan(props.text.slice(3, 8))
props.parsing = true
// check to make sure that we set the correct properties
props.newLine = props.text.includes('\r') ? '\r' : '\n'
props.separatorField = plan.separatorField
props.separatorComponent = plan.separatorComponent
props.separatorRepetition = plan.separatorRepetition
props.separatorEscape = plan.separatorEscape
props.separatorSubComponent = plan.separatorSubComponent
}

return props
Expand Down
47 changes: 47 additions & 0 deletions src/utils/parserPlan.ts
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Original file line number Diff line number Diff line change
@@ -0,0 +1,47 @@

/**
* Used to figure out the current HL7 message(s)/batch delimited used to encode this particular HL7 message.
* @since 1.0.0
*/
export class ParserPlan {
/** @internal */
separatorField?: string
/** @internal */
separatorComponent?: string
/** @internal */
separatorRepetition?: string
/** @internal */
separatorEscape?: string
/** @internal */
separatorSubComponent?: string

/**
* @since 1.0.0
* @param data
*/
constructor (data: string) {
const seps = data.split('')

this.separatorField = seps[0]
if (seps.length > 2) {
this.separatorRepetition = seps[2]
} else {
this.separatorRepetition = '~'
}
if (seps.length > 1) {
this.separatorComponent = seps[1]
} else {
this.separatorComponent = '^'
}
if (seps.length > 4) {
this.separatorSubComponent = seps[4]
} else {
this.separatorSubComponent = '&'
}
if (seps.length > 3) {
this.separatorEscape = seps[3]
} else {
this.separatorEscape = '\\'
}
}
}

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