first commit

common/Database/Metrics/Traits/GeneratesTrendResults.php

@@ -0,0 +1,44 @@
+<?php
+
+namespace Common\Database\Metrics\Traits;
+
+use Carbon\CarbonInterface;
+use Common\Database\Metrics\MetricDateRange;
+
+trait GeneratesTrendResults
+{
+    protected function getAllPossibleDateResults(
+        MetricDateRange $dateRange,
+    ): array {
+        $format = $dateRange->getGroupingFormat();
+
+        // dates in range will already be in correct timezone
+        $possibleDateResults = [];
+        foreach ($dateRange->period as $date) {
+            $possibleDateResults[
+                (string) $date->format($format)
+            ] = $this->formatTrendResult($dateRange->granularity, $date);
+        }
+
+        return $possibleDateResults;
+    }
+
+    protected function formatTrendResult(
+        string $granularity,
+        CarbonInterface $date,
+        int $value = 0,
+    ): array {
+        if ($granularity === $this->dateRange::WEEK) {
+            return [
+                'date' => $date->startOfWeek()->toISOString(),
+                'endDate' => $date->endOfWeek()->toISOString(),
+                'value' => $value,
+            ];
+        } else {
+            return [
+                'date' => $date->toISOString(),
+                'value' => $value,
+            ];
+        }
+    }
+}