pluralized for occurrences vs occurrence (elastic#74564)

Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>
# Conflicts:
#	x-pack/plugins/apm/public/components/app/ErrorGroupDetails/Distribution/index.tsx

x-pack/plugins/apm/public/components/app/ErrorGroupDetails/Distribution/index.tsx

@@ -0,0 +1,129 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+
+import { EuiTitle } from '@elastic/eui';
+import theme from '@elastic/eui/dist/eui_theme_light.json';
+import numeral from '@elastic/numeral';
+import { i18n } from '@kbn/i18n';
+import d3 from 'd3';
+import { scaleUtc } from 'd3-scale';
+import { mean } from 'lodash';
+import React from 'react';
+import { asRelativeDateTimeRange } from '../../../../utils/formatters';
+import { getTimezoneOffsetInMs } from '../../../shared/charts/CustomPlot/getTimezoneOffsetInMs';
+// @ts-ignore
+import Histogram from '../../../shared/charts/Histogram';
+import { EmptyMessage } from '../../../shared/EmptyMessage';
+
+interface IBucket {
+  key: number;
+  count: number | undefined;
+}
+
+// TODO: cleanup duplication of this in distribution/get_distribution.ts (ErrorDistributionAPIResponse) and transactions/distribution/index.ts (TransactionDistributionAPIResponse)
+interface IDistribution {
+  noHits: boolean;
+  buckets: IBucket[];
+  bucketSize: number;
+}
+
+interface FormattedBucket {
+  x0: number;
+  x: number;
+  y: number | undefined;
+}
+
+export function getFormattedBuckets(
+  buckets: IBucket[],
+  bucketSize: number
+): FormattedBucket[] | null {
+  if (!buckets) {
+    return null;
+  }
+
+  return buckets.map(({ count, key }) => {
+    return {
+      x0: key,
+      x: key + bucketSize,
+      y: count,
+    };
+  });
+}
+
+interface Props {
+  distribution: IDistribution;
+  title: React.ReactNode;
+}
+
+const tooltipHeader = (bucket: FormattedBucket) =>
+  asRelativeDateTimeRange(bucket.x0, bucket.x);
+
+export function ErrorDistribution({ distribution, title }: Props) {
+  const buckets = getFormattedBuckets(
+    distribution.buckets,
+    distribution.bucketSize
+  );
+
+  if (!buckets) {
+    return (
+      <EmptyMessage
+        heading={i18n.translate('xpack.apm.errorGroupDetails.noErrorsLabel', {
+          defaultMessage: 'No errors were found',
+        })}
+      />
+    );
+  }
+
+  const averageValue = mean(buckets.map((bucket) => bucket.y)) || 0;
+  const xMin = d3.min(buckets, (d) => d.x0);
+  const xMax = d3.max(buckets, (d) => d.x);
+  const tickFormat = scaleUtc().domain([xMin, xMax]).tickFormat();
+
+  return (
+    <div>
+      <EuiTitle size="xs">
+        <span>{title}</span>
+      </EuiTitle>
+      <Histogram
+        height={180}
+        noHits={distribution.noHits}
+        tooltipHeader={tooltipHeader}
+        verticalLineHover={(bucket: FormattedBucket) => bucket.x}
+        xType="time-utc"
+        formatX={(value: Date) => {
+          const time = value.getTime();
+          return tickFormat(new Date(time - getTimezoneOffsetInMs(time)));
+        }}
+        buckets={buckets}
+        bucketSize={distribution.bucketSize}
+        formatYShort={(value: number) =>
+          i18n.translate('xpack.apm.errorGroupDetails.occurrencesShortLabel', {
+            defaultMessage: '{occCount} occ.',
+            values: { occCount: value },
+          })
+        }
+        formatYLong={(value: number) =>
+          i18n.translate('xpack.apm.errorGroupDetails.occurrencesLongLabel', {
+            defaultMessage:
+              '{occCount} {occCount, plural, one {occurrence} other {occurrences}}',
+            values: { occCount: value },
+          })
+        }
+        legends={[
+          {
+            color: theme.euiColorVis1,
+            // 0a abbreviates large whole numbers with metric prefixes like: 1000 = 1k, 32000 = 32k, 1000000 = 1m
+            legendValue: numeral(averageValue).format('0a'),
+            title: i18n.translate('xpack.apm.errorGroupDetails.avgLabel', {
+              defaultMessage: 'Avg.',
+            }),
+            legendClickDisabled: true,
+          },
+        ]}
+      />
+    </div>
+  );
+}