Timezone Control in the GUIDE

src/electron/frontend/core/components/pages/guided-mode/setup/Preform.js

@@ -3,6 +3,8 @@ import { JSONSchemaForm } from "../../../JSONSchemaForm.js";
 import { Page } from "../../Page.js";
 import { onThrow } from "../../../../errors";
 
+import timezoneSchema from "../../../../../../../schemas/timezone.schema";
+
 // ------------------------------------------------------------------------------
 // ------------------------ Preform Configuration -------------------------------
 // ------------------------------------------------------------------------------
@@ -55,6 +57,11 @@ const questions = {
         },
     },
 
+    timezone: {
+        ...timezoneSchema,
+        title: "What timezone is your data in?",
+    },
+
     upload_to_dandi: {
         type: "boolean",
         title: "Would you like to upload your data to DANDI?",

src/schemas/base-metadata.schema.ts

@@ -6,6 +6,7 @@ import baseMetadataSchema from './json/base_metadata_schema.json' assert { type:
 
 import { merge } from '../electron/frontend/core/components/pages/utils'
 import { drillSchemaProperties } from '../electron/frontend/core/components/pages/guided-mode/data/utils'
+import { localTimeZone } from './timezone.schema'
 
 const UV_MATH_FORMAT = `&micro;V`; //`<math xmlns="http://www.w3.org/1998/Math/MathML"><mo>&micro;</mo><mi>V</mi></math>`
 const UV_PROPERTIES = ["gain_to_uV", "offset_to_uV"]
@@ -41,11 +42,17 @@ function getSpeciesInfo(species: any[][] = []) {
 }
 
 
-// Borrowed from https://stackoverflow.com/a/29774197/7290573
-function getCurrentDate() {
-    const date = new Date()
-    const offset = date.getTimezoneOffset();
-    return (new Date(date.getTime() - (offset*60*1000))).toISOString();
+
+function getISODateInTimezone(
+    timezone = localTimeZone
+) {
+    const date = new Date();
+    const utcDate = new Date(date.toLocaleString('en-US', { timeZone: 'UTC' }));
+    const tzDate = new Date(date.toLocaleString('en-US', { timeZone: timezone }));
+    const offset = utcDate.getTime() - tzDate.getTime();
+
+    const adjustedDate = new Date(date.getTime() - offset);
+    return adjustedDate.toISOString();
 }
 
 
@@ -101,6 +108,10 @@ export const preprocessMetadataSchema = (schema: any = baseMetadataSchema, globa
 
     copy.order = [ "NWBFile", "Subject" ]
 
+    const minDate = "1900-01-01T00:00"
+    const maxDate = getISODateInTimezone().slice(0, -2)
+
+
     // Add unit to weight
     const subjectProps = copy.properties.Subject.properties
     subjectProps.weight.unit = 'kg'
@@ -121,13 +132,18 @@ export const preprocessMetadataSchema = (schema: any = baseMetadataSchema, globa
         strict: false,
         description: 'The species of your subject.'
     }
-    subjectProps.date_of_birth.minimum = "1900-01-01T00:00"
-    subjectProps.date_of_birth.maximum = getCurrentDate().slice(0, -2)
+
+    subjectProps.date_of_birth.minimum = minDate
+    subjectProps.date_of_birth.maximum = maxDate
 
     // copy.order = ['NWBFile', 'Subject']
 
-    copy.properties.NWBFile.title = 'General Metadata'
     const nwbProps = copy.properties.NWBFile.properties
+    copy.properties.NWBFile.title = 'General Metadata'
+
+    nwbProps.session_start_time.minimum = minDate
+    nwbProps.session_start_time.maximum = maxDate
+
     nwbProps.keywords.items.description = "Provide a single keyword (e.g. Neural circuits, V1, etc.)"
 
     // Resolve species suggestions

src/schemas/timezone.schema.ts

@@ -0,0 +1,41 @@
+
+// const timezones = Intl.supportedValuesOf('timeZone');
+
+const mostCommonTimezonesWithUTCOffset = {
+    'Pacific/Honolulu': '-10:00',
+    'America/Anchorage': '-09:00',
+    'America/Los_Angeles': '-08:00',
+    'America/Denver': '-07:00',
+    'America/Chicago': '-06:00',
+    'America/New_York': '-05:00',
+    'America/Sao_Paulo': '-03:00',
+    'Atlantic/Azores': '-01:00',
+    'Europe/London': '+00:00',
+    'Europe/Paris': '+01:00',
+    'Europe/Athens': '+02:00',
+    'Asia/Jerusalem': '+02:00',
+    'Europe/Moscow': '+03:00',
+    'Asia/Dubai': '+04:00',
+    'Asia/Karachi': '+05:00',
+    'Asia/Dhaka': '+06:00',
+    'Asia/Jakarta': '+07:00',
+    'Asia/Shanghai': '+08:00',
+    'Asia/Tokyo': '+09:00',
+    'Australia/Sydney': '+10:00',
+    'Pacific/Auckland': '+12:00'
+};
+
+
+export const localTimeZone = Intl.DateTimeFormat().resolvedOptions().timeZone;
+
+export default {
+    type: "string",
+    description: "Provide a base timezone for all date and time operations in the GUIDE.",
+    default: localTimeZone,
+    enum: Object.keys(mostCommonTimezonesWithUTCOffset),
+    enumLabels: Object.entries(mostCommonTimezonesWithUTCOffset).reduce((acc, [ name, offset ]) => {
+        acc[name] = `${name} (${offset})`
+        return acc
+    }),
+    strict: true
+}