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Add find nearest feature 

Signed-off-by: Fred Boniface <fred@fjla.uk>
This commit is contained in:
Fred Boniface 2024-06-30 21:23:22 +01:00
parent 2a9050940d
commit 9031eb53c6
3 changed files with 17 additions and 11 deletions
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14
package-lock.json generated
View File

@ -3138,12 +3138,12 @@
}
},
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"version": "3.0.3",
"resolved": "https://registry.npmjs.org/braces/-/braces-3.0.3.tgz",
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"dev": true,
"dependencies": {
"fill-range": "^7.0.1"
"fill-range": "^7.1.1"
},
"engines": {
"node": ">=8"
@ -4297,9 +4297,9 @@
}
},
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"version": "7.0.1",
"resolved": "https://registry.npmjs.org/fill-range/-/fill-range-7.0.1.tgz",
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"dev": true,
"dependencies": {
"to-regex-range": "^5.0.1"

3
src/services/ldb.services.js
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@ -179,10 +179,11 @@ async function getReasonCode(code) {
}
async function getNearestStations(lat, long) {
logger.debug(`ldbService.getNearestStations: Fetching nearest stations`)
let pipeline = findStationsByDistancePipeline(4, lat, long)
try {
return await db.queryAggregate(pipeline)
return await db.queryAggregate("stations", pipeline)
} catch (err) {
logger.error(err, `ldbService.getNearestStations`)
}

11
src/utils/ldbPipeline.utils.ts
View File

@ -1,11 +1,13 @@
export function findStationsByDistancePipeline(count: number, latitude: number, longitude: number) {
return [
export function findStationsByDistancePipeline(count: number, latitude: string, longitude: string) {
const numericLatitude = parseFloat(latitude)
const numericLongitude = parseFloat(longitude)
const pipeline = [
{
'$geoNear': {
'near': {
'type': 'Point',
'coordinates': [
longitude, latitude
numericLongitude, numericLatitude
]
},
'distanceField': 'distance'
@ -39,4 +41,7 @@ export function findStationsByDistancePipeline(count: number, latitude: number,
}
}
]
//console.log(JSON.stringify(pipeline))
return pipeline
}