Query Correlation Samples

function queryCorrelationSamples(
  typeIdentifier: CorrelationTypeIdentifier,
  options: QueryOptionsWithSortOrder
): Promise<readonly CorrelationSample[]>

import { queryCorrelationSamples } from '@kingstinct/react-native-healthkit'

// Query blood pressure readings
const bloodPressureReadings = await queryCorrelationSamples(
  'HKCorrelationTypeIdentifierBloodPressure',
  {
    limit: 10,
    ascending: false, // newest first
  }
)

for (const reading of bloodPressureReadings) {
  console.log('Blood Pressure:', {
    date: reading.startDate,
    uuid: reading.uuid,
  })
  
  // Extract systolic and diastolic values
  for (const obj of reading.objects) {
    if ('quantityType' in obj) {
      console.log(`${obj.quantityType}: ${obj.quantity} ${obj.unit}`)
    }
  }
}

// Query food entries from last week
const weekAgo = new Date()
weekAgo.setDate(weekAgo.getDate() - 7)

const foodEntries = await queryCorrelationSamples(
  'HKCorrelationTypeIdentifierFood',
  {
    filter: {
      startDate: weekAgo,
    },
    limit: -1, // all entries
    ascending: true,
  }
)

for (const food of foodEntries) {
  console.log('Food:', {
    date: food.startDate,
    foodType: food.metadataFoodType,
  })
  
  // Extract nutritional values
  for (const obj of food.objects) {
    if ('quantityType' in obj) {
      console.log(`${obj.quantityType}: ${obj.quantity} ${obj.unit}`)
    }
  }
}

function queryCorrelationSamplesWithAnchor(
  typeIdentifier: CorrelationTypeIdentifier,
  options: QueryOptionsWithAnchor
): Promise<QueryCorrelationSamplesWithAnchorResponse>

import { queryCorrelationSamplesWithAnchor } from '@kingstinct/react-native-healthkit'

// Initial query
let anchor: string | undefined

const initialResult = await queryCorrelationSamplesWithAnchor(
  'HKCorrelationTypeIdentifierBloodPressure',
  {
    limit: 100,
    anchor: undefined, // first query
  }
)

console.log(`Initial: ${initialResult.correlations.length} readings`)
anchor = initialResult.newAnchor

// Subsequent query - only gets changes since last query
const updateResult = await queryCorrelationSamplesWithAnchor(
  'HKCorrelationTypeIdentifierBloodPressure',
  {
    limit: 100,
    anchor, // use saved anchor
  }
)

console.log(`New readings: ${updateResult.correlations.length}`)
console.log(`Deleted readings: ${updateResult.deletedSamples.length}`)
anchor = updateResult.newAnchor // save for next time

// Handle deletions
for (const deleted of updateResult.deletedSamples) {
  console.log(`Reading ${deleted.uuid} was deleted on ${deleted.deletedDate}`)
}