fix: implement temporary schema definition to support datetime scalars

packages/graphql-scalars/src/datetime.ts

@@ -0,0 +1,100 @@
+//@TODO Remove this file when https://github.com/Urigo/graphql-scalars/pull/1641 is merged
+
+import { GraphQLScalarType, Kind } from 'graphql'
+
+function validateTime(time: string): boolean {
+  time = time?.toUpperCase()
+  const TIME_REGEX =
+    /^([01][0-9]|2[0-3]):([0-5][0-9]):([0-5][0-9])(\.\d{1,})?(([Z])|([+|-]([01][0-9]|2[0-3]):[0-5][0-9]))$/
+  return TIME_REGEX.test(time)
+}
+
+function validateDate(date: string): boolean {
+  const RFC_3339_REGEX = /^(\d{4}-(0[1-9]|1[012])-(0[1-9]|[12][0-9]|3[01]))$/
+  if (!RFC_3339_REGEX.test(date)) {
+    return false
+  }
+  // Verify the correct number of days for
+  // the month contained in the date-string.
+  const year = Number(date.substr(0, 4))
+  const month = Number(date.substr(5, 2))
+  const day = Number(date.substr(8, 2))
+  switch (month) {
+    case 2: // February
+      if (((year % 4 === 0 && year % 100 !== 0) || year % 400 === 0) && day > 29) {
+        return false
+      } else if (((year % 4 === 0 && year % 100 !== 0) || year % 400 === 0) && day > 28) {
+        return false
+      }
+      return true
+    case 4: // April
+    case 6: // June
+    case 9: // September
+    case 11: // November
+      if (day > 30) {
+        return false
+      }
+      break
+  }
+  return true
+}
+
+function validateDateTime(input: string): boolean {
+  input = input?.toUpperCase()
+  const RFC_3339_REGEX =
+    /^(\d{4}-(0[1-9]|1[012])-(0[1-9]|[12][0-9]|3[01])T([01][0-9]|2[0-3]):([0-5][0-9]):([0-5][0-9]|60))(\.\d{1,})?(([Z])|([+|-]([01][0-9]|2[0-3]):[0-5][0-9]))$/
+
+  // Validate the structure of the date-string
+  if (!RFC_3339_REGEX.test(input)) {
+    return false
+  }
+
+  // Check if it is a correct date using the javascript Date parse() method.
+  const time = Date.parse(input)
+  if (time !== time) {
+      // eslint-disable-line
+    return false
+  }
+  // Split the date-time-string up into the string-date and time-string part.
+  // and check whether these parts are RFC 3339 compliant.
+  const index = input.indexOf('T')
+  const dateString = input.substr(0, index)
+  const timeString = input.substr(index + 1)
+  return validateDate(dateString) && validateTime(timeString)
+}
+
+export const DateTime = new GraphQLScalarType({
+  name: 'DateTime',
+  description:
+    'A date-time string at UTC, such as 2007-12-03T10:15:30Z, ' +
+    'compliant with the date-time format outlined in section 5.6 of ' +
+    'the RFC 3339 profile of the ISO 8601 standard for representation ' +
+    'of dates and times using the Gregorian calendar.',
+  serialize: (dateString) => {
+    if (typeof dateString === 'string' && validateDateTime(dateString)) {
+      if (dateString.indexOf('Z') !== -1) {
+        return dateString
+      } else
+        throw new TypeError(`DateTime string must be formatted to UTC time  ${String(dateString)}.`)
+    } else
+      throw new TypeError(
+        `DateTime cannot represent an invalid date-time-string  ${String(dateString)}.`
+      )
+  },
+  parseValue: (value) => {
+    if (typeof value === 'string' && validateDateTime(value)) {
+      return value
+    } else
+      throw new TypeError(`DateTime cannot represent an invalid date-time-string ${String(value)}.`)
+  },
+  parseLiteral: (ast) => {
+    if (ast.kind !== Kind.STRING) {
+      throw new TypeError('DateTime cannot represent non string or Date type')
+    }
+    const { value } = ast
+    if (validateDateTime(value)) {
+      return value
+    }
+    throw new TypeError(`DateTime cannot represent an invalid date-time-string ${String(value)}.`)
+  },
+})

packages/graphql-scalars/src/index.ts

@@ -10,17 +10,21 @@ import {
 import {
   GraphQLCountryCode,
   GraphQLDate,
-  GraphQLDateTime,
+  //GraphQLDateTime,
   GraphQLDID,
   GraphQLTime,
 } from 'graphql-scalars'
 
 import { CeramicCommitID, CeramicStreamID } from './ceramic.js'
 
+//@TODO Remove these imports when https://github.com/Urigo/graphql-scalars/pull/1641 is merged
+import { DateTime as GraphQLDateTime } from './datetime.js'
+export { DateTime as GraphQLDateTime } from './datetime.js'
+
 export {
   GraphQLCountryCode,
   GraphQLDate,
-  GraphQLDateTime,
+  //GraphQLDateTime,
   GraphQLDID,
   GraphQLTime,
 } from 'graphql-scalars'