How do I get the total per day?

[bitdelve]

I see that the returned results for getDailyStepCountSamples returns multiple objects per day. Is there a way to have it return the total for each day?

[seanblonien]

not that I am aware of. I use the getDailyStepCountSamples API and then simply do the aggregation into a day with the given start/end timestamps myself. I am unsure if the API guarantees a standard interval/range for each object returned, so knowing that, it is left up to you to decide how to aggregate the data according to your domain/user requirements.

for example, your definition of what a "day" is may change if you are doing absolute timing (i.e. every time is in UTC) vs. doing day aggregations based on relative timing (i.e. in a timezone offset). I recommend always store data as UTC, and simply present it to your users in their local timezone, but the point is it is YOUR decision as the developer what constitutes a "day" and so you have to program that aggregation yourself

it's quite simply tho conceptually, in rough pseudo code for it:

// ⬇️ your specific aggregate function below
// ...may be simply determining if same calendar day for example
const getHealthValueKey = (value: HealthValue) => { //... } 

const steps: HealthValue[] = getDailyStepCountSamples();

const stepsAggregatedByDay = steps.reduce((accum, current) => {
    const key = getKey(current);
    const existingValue = accum[key];

    if (existingValue) {
      existingValue.value += current.value; // Aggregate the value for the same key
    } else {
      accum[key] = { ...current }; // Create a new entry for this key
    }

    return accum;
  }, {});

const stepsAggregatedByDayArray = Object.values(stepsAggregatedByDay);