#399

frontend/src/components/common/DateTimeField.tsx

@@ -8,13 +8,27 @@ import type { ComponentPropsWithoutRef, FC, FocusEvent } from 'react'
 const pad = (n: number): string => n.toString ().padStart (2, '0')
 
 
-const toDateTimeLocalValue = (d: Date) => {
-  const y = d.getFullYear ()
-  const m = pad (d.getMonth () + 1)
-  const day = pad (d.getDate ())
-  const h = pad (d.getHours ())
-  const min = pad (d.getMinutes ())
-  return `${ y }-${ m }-${ day }T${ h }:${ min }:00`
+const toDateTimeLocalValue = (value: Date) => {
+  const y = value.getFullYear ()
+  const m = pad (value.getMonth () + 1)
+  const day = pad (value.getDate ())
+  const h = pad (value.getHours ())
+  const min = pad (value.getMinutes ())
+  return `${ y }-${ m }-${ day }T${ h }:${ min }`
+}
+
+
+const toMinutePrecisionIsoUtc = (value: string) => {
+  const date = new Date (value)
+  if (Number.isNaN (date.getTime ()))
+    return value
+
+  const y = date.getUTCFullYear ()
+  const m = pad (date.getUTCMonth () + 1)
+  const day = pad (date.getUTCDate ())
+  const h = pad (date.getUTCHours ())
+  const min = pad (date.getUTCMinutes ())
+  return `${ y }-${ m }-${ day }T${ h }:${ min }Z`
 }
 
 
@@ -47,14 +61,16 @@ const DateTimeField: FC<Props> = ({ value, onChange, className, onBlur, invalid,
 			     'focus:ring-2 focus:ring-blue-200']),
 			 className)}
 	  type="datetime-local"
+	  step={60}
 	  value={local}
 	  aria-invalid={invalid}
 	  onChange={ev => {
 	    const v = ev.target.value
 	    setLocal (v)
-	    onChange?.(v ? (new Date (v)).toISOString () : null)
+	    onChange?.(v ? toMinutePrecisionIsoUtc (v) : null)
 	  }}
 	  onBlur={onBlur}/>)
 }
 
 export default DateTimeField
+export { toMinutePrecisionIsoUtc }