Improve handling of time-only fields and fix issue where time-only values were not displayed properly

packages/bbui/src/Form/Core/DatePicker/DateInput.svelte

@@ -1,5 +1,6 @@
 <script>
   import Icon from "../../../Icon/Icon.svelte"
+  import { getDateDisplayValue } from "../../../helpers"
 
   export let anchor
   export let disabled
@@ -13,20 +14,7 @@
   export let enableTime
   export let timeOnly
 
-  $: displayValue = getDisplayValue(value, enableTime, timeOnly)
-
-  const getDisplayValue = (value, enableTime, timeOnly) => {
-    if (!value?.isValid()) {
-      return ""
-    }
-    if (timeOnly) {
-      return value.format("HH:mm")
-    } else if (!enableTime) {
-      return value.format("MMMM D YYYY")
-    } else {
-      return value.format("MMMM D YYYY, HH:mm")
-    }
-  }
+  $: displayValue = getDateDisplayValue(value, { enableTime, timeOnly })
 </script>
 
 <!-- svelte-ignore a11y-no-static-element-interactions -->

packages/bbui/src/Form/Core/DatePicker/DatePicker.svelte

@@ -7,7 +7,7 @@
   import { createEventDispatcher, onMount } from "svelte"
   import TimePicker from "./TimePicker.svelte"
   import Calendar from "./Calendar.svelte"
-  import DateTimeInput from "./DateInput.svelte"
+  import DateInput from "./DateInput.svelte"
   import ActionButton from "../../../ActionButton/ActionButton.svelte"
   import { parseDate } from "../../../helpers"
 
@@ -68,9 +68,13 @@
     }
     let newValue = date.toISOString()
 
-    // If time only set date component to 2000-01-01
-    if (timeOnly) {
-      newValue = `2000-01-01T${newValue.split("T")[1]}`
+    // Time only fields always ignore timezones, otherwise they make no sense.
+    // For non-timezone-aware fields, create an ISO 8601 timestamp of the exact
+    // time picked, without timezone
+    const offsetForTimezone = (enableTime && ignoreTimezones) || timeOnly
+    if (offsetForTimezone) {
+      const offset = new Date().getTimezoneOffset() * 60000
+      newValue = new Date(date.valueOf() - offset).toISOString().slice(0, -1)
     }
 
     // For date-only fields, construct a manual timestamp string without a time
@@ -82,13 +86,6 @@
       newValue = `${year}-${month}-${day}T00:00:00.000`
     }
 
-    // For non-timezone-aware fields, create an ISO 8601 timestamp of the exact
-    // time picked, without timezone
-    else if (enableTime && ignoreTimezones) {
-      const offset = new Date().getTimezoneOffset() * 60000
-      newValue = new Date(date.valueOf() - offset).toISOString().slice(0, -1)
-    }
-
     dispatch("change", newValue)
   }
 
@@ -106,7 +103,7 @@
   })
 </script>
 
-<DateTimeInput
+<DateInput
   bind:anchor
   {disabled}
   {readonly}

packages/bbui/src/helpers.js

@@ -117,7 +117,7 @@ export const copyToClipboard = value => {
   })
 }
 
-export const parseDate = (value, { timeOnly, dateOnly } = {}) => {
+export const parseDate = (value, { dateOnly } = {}) => {
   // If empty then invalid
   if (!value) {
     return null
@@ -125,7 +125,8 @@ export const parseDate = (value, { timeOnly, dateOnly } = {}) => {
 
   // Certain string values need transformed
   if (typeof value === "string") {
-    if (timeOnly || !isNaN(new Date(`0-${value}`))) {
+    // Check for time only values
+    if (!isNaN(new Date(`0-${value}`))) {
       value = `0-${value}`
     }
 
@@ -146,3 +147,16 @@ export const parseDate = (value, { timeOnly, dateOnly } = {}) => {
   // millisecond.
   return dayjs(Math.floor(parsedDate.valueOf() / 1000) * 1000)
 }
+
+export const getDateDisplayValue = (value, { enableTime, timeOnly }) => {
+  if (!value?.isValid()) {
+    return ""
+  }
+  if (timeOnly) {
+    return value.format("HH:mm")
+  } else if (!enableTime) {
+    return value.format("MMMM D YYYY")
+  } else {
+    return value.format("MMMM D YYYY, HH:mm")
+  }
+}

packages/frontend-core/src/components/grid/cells/DateCell.svelte

@@ -14,17 +14,15 @@
 
   $: timeOnly = schema?.timeOnly
   $: dateOnly = schema?.dateOnly
-  $: format = timeOnly
-    ? "HH:mm:ss"
-    : dateOnly
-    ? "MMM D YYYY"
-    : "MMM D YYYY, HH:mm"
   $: editable = focused && !readonly
-  $: displayValue = getDisplayValue(value, timeOnly, dateOnly, format)
+  $: displayValue = getDisplayValue(value, timeOnly, dateOnly)
 
-  const getDisplayValue = (value, timeOnly, dateOnly, format) => {
-    const parsedDate = Helpers.parseDate(value, { timeOnly, dateOnly })
-    return parsedDate?.format(format) || ""
+  const getDisplayValue = (value, timeOnly, dateOnly) => {
+    const parsedDate = Helpers.parseDate(value, { dateOnly })
+    return Helpers.getDateDisplayValue(parsedDate, {
+      enableTime: !dateOnly,
+      timeOnly,
+    })
   }
 
   // Ensure we close flatpickr when unselected