forked from eatvio/eatvio_app
feat(insights): first isights impemetation
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misha
222
lib/features/insights/domain/insights_text_builder.dart
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222
lib/features/insights/domain/insights_text_builder.dart
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import 'package:eatvio_app/features/insights/models/insights_payload_model.dart';
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import 'package:eatvio_app/features/insights/models/insights_period.dart';
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import 'package:eatvio_app/features/profile/models/circumference_model.dart';
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import 'package:eatvio_app/features/profile/models/weight_model.dart';
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import 'package:eatvio_app/generated/l10n.dart';
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/// Собирает [InsightsPayloadModel] из сырых точек мобильного API.
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///
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/// Зеркало веб-`UserInsightsService`: порог изменения [deltaEpsilon], минимум две
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/// точки для дельты, те же категории ИМТ и формат подписей.
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class InsightsTextBuilder {
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InsightsTextBuilder(this.s);
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final S s;
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static const double deltaEpsilon = 0.05;
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static const String _emptyHeadline = '—';
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InsightsPayloadModel build({
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required List<WeightModel> weights,
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required List<CircumferenceModel> circumferences,
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required BodyPeriod period,
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int? heightCm,
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}) {
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final sortedWeights = [...weights]
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..sort((a, b) => a.createdAt.compareTo(b.createdAt));
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final sortedCircumferences = [...circumferences]
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..sort((a, b) => a.createdAt.compareTo(b.createdAt));
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return InsightsPayloadModel(
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weight: buildWeight(sortedWeights, period),
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bmi: buildBmi(sortedWeights, period, heightCm),
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measure: buildMeasure(sortedCircumferences, period),
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);
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}
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WeightChartModel buildWeight(List<WeightModel> weights, BodyPeriod period) {
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final values = weights.map((e) => e.weight).toList();
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final last = values.isEmpty ? null : values.last;
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final delta = values.length < 2 ? null : _round(values.last - values.first);
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return WeightChartModel(
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labels: weights.map((e) => formatLabel(e.createdAt)).toList(),
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values: values,
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last: last,
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delta: delta,
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headline: last == null ? _emptyHeadline : last.toStringAsFixed(1),
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unit: s.insights_unit_kg,
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deltaText: _weightDeltaText(values, period),
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);
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}
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BmiChartModel buildBmi(
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List<WeightModel> weights,
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BodyPeriod period,
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int? heightCm,
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) {
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final hasHeight = heightCm != null && heightCm > 0;
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if (!hasHeight) {
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return BmiChartModel(
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headline: _emptyHeadline,
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deltaText: s.insights_need_height,
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hint: s.insights_need_height,
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);
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}
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final points = weights.where((e) => e.bmi != null).toList();
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final values = points.map((e) => e.bmi!).toList();
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final last = values.isEmpty ? null : values.last;
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final delta = values.length < 2 ? null : _round(values.last - values.first);
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final category = last == null ? null : bmiCategory(last);
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return BmiChartModel(
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labels: points.map((e) => formatLabel(e.createdAt)).toList(),
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values: values,
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last: last,
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delta: delta,
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headline: last == null ? _emptyHeadline : last.toStringAsFixed(1),
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category: category,
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deltaText: _bmiDeltaText(values, period, category),
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hint: s.insights_bmi_hint(heightCm.toString()),
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);
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}
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MeasureChartModel buildMeasure(
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List<CircumferenceModel> circumferences,
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BodyPeriod period,
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) {
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final waist = circumferences.map((e) => e.waistCircumference).toList();
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final chest = circumferences.map((e) => e.chestCircumference).toList();
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final hips = circumferences.map((e) => e.hipCircumference).toList();
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return MeasureChartModel(
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labels: circumferences.map((e) => formatLabel(e.createdAt)).toList(),
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waist: waist,
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chest: chest,
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hips: hips,
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headline: waist.isEmpty ? _emptyHeadline : waist.last.round().toString(),
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deltaText: _measureDeltaText(
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waist: waist,
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chest: chest,
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hips: hips,
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period: period,
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),
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);
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}
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/// Категория по таблице ВОЗ из постановки #2120.
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String bmiCategory(double bmi) {
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if (bmi < 16) {
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return s.insights_bmi_severe_underweight;
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}
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if (bmi < 18.5) {
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return s.insights_bmi_underweight;
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}
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if (bmi < 25) {
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return s.insights_bmi_normal;
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}
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if (bmi < 30) {
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return s.insights_bmi_overweight;
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}
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if (bmi < 35) {
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return s.insights_bmi_obesity_1;
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}
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if (bmi < 40) {
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return s.insights_bmi_obesity_2;
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}
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return s.insights_bmi_obesity_3;
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}
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String periodLabel(BodyPeriod period) {
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switch (period) {
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case BodyPeriod.month:
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return s.insights_period_label_1;
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case BodyPeriod.threeMonths:
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return s.insights_period_label_3;
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case BodyPeriod.sixMonths:
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return s.insights_period_label_6;
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case BodyPeriod.year:
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return s.insights_period_label_12;
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case BodyPeriod.all:
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return s.insights_period_label_all;
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}
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}
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String formatLabel(DateTime date) {
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final local = date.toLocal();
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final day = local.day.toString().padLeft(2, '0');
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final month = local.month.toString().padLeft(2, '0');
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return '$day.$month';
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}
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/// Одна цифра после запятой без хвостового нуля: `3`, `3.5`.
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String formatNumber(double value) {
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final text = value.toStringAsFixed(1);
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return text.endsWith('.0') ? text.substring(0, text.length - 2) : text;
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}
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String _weightDeltaText(List<double> values, BodyPeriod period) {
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if (values.length < 2) {
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return s.insights_not_enough;
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}
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final diff = values.last - values.first;
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final periodText = periodLabel(period);
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if (diff.abs() < deltaEpsilon) {
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return s.insights_weight_same(periodText);
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}
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final value = formatNumber(diff.abs());
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return diff < 0
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? s.insights_weight_lost(value, periodText)
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: s.insights_weight_gained(value, periodText);
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}
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String _bmiDeltaText(
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List<double> values,
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BodyPeriod period,
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String? category,
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) {
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if (values.length < 2 || category == null) {
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return s.insights_not_enough;
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}
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final diff = values.last - values.first;
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final periodText = periodLabel(period);
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if (diff.abs() < deltaEpsilon) {
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return s.insights_bmi_same(periodText, category);
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}
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final value = formatNumber(diff.abs());
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return diff < 0
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? s.insights_bmi_lower(value, periodText, category)
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: s.insights_bmi_higher(value, periodText, category);
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}
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String _measureDeltaText({
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required List<double> waist,
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required List<double> chest,
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required List<double> hips,
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required BodyPeriod period,
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}) {
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if (waist.length < 2) {
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return s.insights_not_enough;
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}
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final parts = [
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_measurePart(s.insights_series_waist, waist),
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_measurePart(s.insights_series_chest, chest),
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_measurePart(s.insights_series_hips, hips),
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];
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return s.insights_measures_summary(parts.join(', '), periodLabel(period));
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}
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String _measurePart(String name, List<double> values) {
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final diff = values.last - values.first;
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if (diff.abs() < deltaEpsilon) {
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return s.insights_measure_same(name);
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}
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final value = formatNumber(diff.abs());
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return diff < 0
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? s.insights_measure_less(name, value)
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: s.insights_measure_more(name, value);
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}
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double _round(double value) => (value * 10).round() / 10;
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}
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