From 1a6d34ac598a665a051043479f1299d7fdcaf79f Mon Sep 17 00:00:00 2001
From: Ben Grant <benjamin.grantGRA0007@gmail.com>
Date: Sun, 28 May 2023 23:15:58 +1000
Subject: [PATCH] View event availabilities

---
 frontend/src/app/[id]/EventAvailabilities.tsx | 118 ++++++++++++++++++
 frontend/src/app/[id]/layout.tsx              |  17 +++
 frontend/src/app/[id]/not-found.tsx           |  17 +++
 frontend/src/app/[id]/page.module.scss        |  66 ++++++++++
 frontend/src/app/[id]/page.tsx                |  41 ++++++
 .../components/Copyable/Copyable.module.scss  |   7 ++
 frontend/src/components/Copyable/Copyable.tsx |  33 +++++
 .../src/components/CreateForm/CreateForm.tsx  |  20 +--
 .../EventInfo/EventInfo.module.scss           |   8 --
 .../components/EventInfo/EventInfo.tsx        |  19 +--
 .../src/components/Login/Login.module.scss    |  23 ++++
 frontend/src/components/Login/Login.tsx       | 100 +++++++++++++++
 frontend/src/components/Stats/Stats.tsx       |  11 +-
 frontend/src/components/index.ts              |  18 ---
 frontend/src/config/api.ts                    |  39 +++++-
 frontend/src/utils/expandTimes.ts             |  13 ++
 frontend/src/utils/index.ts                   |   1 +
 17 files changed, 483 insertions(+), 68 deletions(-)
 create mode 100644 frontend/src/app/[id]/EventAvailabilities.tsx
 create mode 100644 frontend/src/app/[id]/layout.tsx
 create mode 100644 frontend/src/app/[id]/not-found.tsx
 create mode 100644 frontend/src/app/[id]/page.module.scss
 create mode 100644 frontend/src/app/[id]/page.tsx
 create mode 100644 frontend/src/components/Copyable/Copyable.module.scss
 create mode 100644 frontend/src/components/Copyable/Copyable.tsx
 create mode 100644 frontend/src/components/Login/Login.module.scss
 create mode 100644 frontend/src/components/Login/Login.tsx
 delete mode 100644 frontend/src/components/index.ts
 create mode 100644 frontend/src/utils/expandTimes.ts

diff --git a/frontend/src/app/[id]/EventAvailabilities.tsx b/frontend/src/app/[id]/EventAvailabilities.tsx
new file mode 100644
index 0000000..56f1021
--- /dev/null
+++ b/frontend/src/app/[id]/EventAvailabilities.tsx
@@ -0,0 +1,118 @@
+'use client'
+
+import { useMemo, useState } from 'react'
+import { Trans } from 'react-i18next/TransWithoutContext'
+
+import AvailabilityViewer from '/src/components/AvailabilityViewer/AvailabilityViewer'
+import Content from '/src/components/Content/Content'
+import Login from '/src/components/Login/Login'
+import Section from '/src/components/Section/Section'
+import SelectField from '/src/components/SelectField/SelectField'
+import { EventResponse, PersonResponse } from '/src/config/api'
+import { useTranslation } from '/src/i18n/client'
+import timezones from '/src/res/timezones.json'
+import { expandTimes, makeClass } from '/src/utils'
+
+import styles from './page.module.scss'
+
+const EventAvailabilities = ({ event, people }: { event: EventResponse, people: PersonResponse[] }) => {
+  const { t, i18n } = useTranslation('event')
+
+  const expandedTimes = useMemo(() => expandTimes(event.times), [event.times])
+
+  const [user, setUser] = useState<PersonResponse>()
+  const [password, setPassword] = useState<string>()
+
+  const [tab, setTab] = useState<'group' | 'you'>('group')
+  const [timezone, setTimezone] = useState(Intl.DateTimeFormat().resolvedOptions().timeZone)
+
+  return <>
+    <Section id="login">
+      <Content>
+        <Login eventId={event.id} user={user} onChange={(u, p) => {
+          setUser(u)
+          setPassword(p)
+        }} />
+
+        <SelectField
+          label={t('form.timezone')}
+          name="timezone"
+          id="timezone"
+          isInline
+          value={timezone}
+          onChange={event => setTimezone(event.currentTarget.value)}
+          options={timezones}
+        />
+
+        {event?.timezone && event.timezone !== timezone && <p>
+          <Trans i18nKey="form.created_in_timezone" t={t} i18n={i18n}>
+            {/* eslint-disable-next-line */}
+            {/* @ts-ignore */}
+            _<strong>{{timezone: event.timezone}}</strong>
+            _<a href="#" onClick={e => {
+              e.preventDefault()
+              setTimezone(event.timezone)
+            }}>_</a>_
+          </Trans>
+        </p>}
+
+        {((
+          Intl.DateTimeFormat().resolvedOptions().timeZone !== timezone
+          && (event?.timezone && event.timezone !== Intl.DateTimeFormat().resolvedOptions().timeZone)
+        ) || (
+          event?.timezone === undefined
+          && Intl.DateTimeFormat().resolvedOptions().timeZone !== timezone
+        )) && (
+          <p>
+            <Trans i18nKey="form.local_timezone" t={t} i18n={i18n}>
+              {/* eslint-disable-next-line */}
+              {/* @ts-ignore */}
+              _<strong>{{timezone: Intl.DateTimeFormat().resolvedOptions().timeZone}}</strong>
+              _<a href="#" onClick={e => {
+                e.preventDefault()
+                setTimezone(Intl.DateTimeFormat().resolvedOptions().timeZone)
+              }}>_</a>_
+            </Trans>
+          </p>
+        )}
+      </Content>
+    </Section>
+
+    <Content>
+      <div className={styles.tabs}>
+        <button
+          className={makeClass(
+            styles.tab,
+            tab === 'you' && styles.tabSelected,
+            !user && styles.tabDisabled,
+          )}
+          type="button"
+          onClick={() => {
+            if (user) {
+              setTab('you')
+            } else {
+              document.dispatchEvent(new CustomEvent('focusName'))
+            }
+          }}
+          title={user ? '' : t<string>('tabs.you_tooltip')}
+        >{t('tabs.you')}</button>
+        <button
+          className={makeClass(
+            styles.tab,
+            tab === 'group' && styles.tabSelected,
+          )}
+          type="button"
+          onClick={() => setTab('group')}
+        >{t('tabs.group')}</button>
+      </div>
+    </Content>
+
+    {tab === 'group' && <AvailabilityViewer
+      times={expandedTimes}
+      people={people}
+      timezone={timezone}
+    />}
+  </>
+}
+
+export default EventAvailabilities
diff --git a/frontend/src/app/[id]/layout.tsx b/frontend/src/app/[id]/layout.tsx
new file mode 100644
index 0000000..2717856
--- /dev/null
+++ b/frontend/src/app/[id]/layout.tsx
@@ -0,0 +1,17 @@
+import Content from '/src/components/Content/Content'
+import Footer from '/src/components/Footer/Footer'
+import Header from '/src/components/Header/Header'
+
+const Layout = async ({ children }: { children: React.ReactNode }) => <>
+  <Content>
+    {/* @ts-expect-error Async Server Component */}
+    <Header />
+  </Content>
+
+  {children}
+
+  {/* @ts-expect-error Async Server Component */}
+  <Footer />
+</>
+
+export default Layout
diff --git a/frontend/src/app/[id]/not-found.tsx b/frontend/src/app/[id]/not-found.tsx
new file mode 100644
index 0000000..d118932
--- /dev/null
+++ b/frontend/src/app/[id]/not-found.tsx
@@ -0,0 +1,17 @@
+import Content from '/src/components/Content/Content'
+import { useTranslation } from '/src/i18n/server'
+
+import styles from './page.module.scss'
+
+const NotFound = async () => {
+  const { t } = await useTranslation('event')
+
+  return <Content>
+    <div style={{ marginBlock: 100 }}>
+      <h1 className={styles.name}>{t('error.title')}</h1>
+      <p className={styles.info}>{t('error.body')}</p>
+    </div>
+  </Content>
+}
+
+export default NotFound
diff --git a/frontend/src/app/[id]/page.module.scss b/frontend/src/app/[id]/page.module.scss
new file mode 100644
index 0000000..a903f86
--- /dev/null
+++ b/frontend/src/app/[id]/page.module.scss
@@ -0,0 +1,66 @@
+.name {
+  text-align: center;
+  font-weight: 800;
+  margin: 20px 0 5px;
+}
+
+.info {
+  margin: 6px 0;
+  text-align: center;
+  font-size: 15px;
+}
+
+.noPrint {
+  @media print {
+    display: none;
+  }
+}
+
+.date {
+  display: block;
+  text-align: center;
+  font-size: 14px;
+  opacity: .8;
+  margin: 0 0 10px;
+  font-weight: 500;
+  letter-spacing: .01em;
+
+  @media print {
+    &::after {
+      content: ' - ' attr(title);
+    }
+  }
+}
+
+.tabs {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  margin: 30px 0 20px;
+}
+
+.tab {
+  user-select: none;
+  display: block;
+  color: var(--text);
+  padding: 8px 18px;
+  background-color: var(--surface);
+  border: 1px solid var(--primary);
+  border-bottom: 0;
+  margin: 0 4px;
+  font: inherit;
+  border-top-left-radius: 5px;
+  border-top-right-radius: 5px;
+  cursor: pointer;
+}
+
+.tabSelected {
+  color: #FFF;
+  background-color: var(--primary);
+  border-color: var(--primary);
+}
+
+.tabDisabled {
+  opacity: .5;
+  cursor: not-allowed;
+}
diff --git a/frontend/src/app/[id]/page.tsx b/frontend/src/app/[id]/page.tsx
new file mode 100644
index 0000000..046700c
--- /dev/null
+++ b/frontend/src/app/[id]/page.tsx
@@ -0,0 +1,41 @@
+import { Trans } from 'react-i18next/TransWithoutContext'
+import { notFound } from 'next/navigation'
+import { Temporal } from '@js-temporal/polyfill'
+
+import Content from '/src/components/Content/Content'
+import Copyable from '/src/components/Copyable/Copyable'
+import { getEvent, getPeople } from '/src/config/api'
+import { useTranslation } from '/src/i18n/server'
+import { makeClass, relativeTimeFormat } from '/src/utils'
+
+import EventAvailabilities from './EventAvailabilities'
+import styles from './page.module.scss'
+
+const Page = async ({ params }: { params: { id: string } }) => {
+  const event = await getEvent(params.id).catch(() => undefined)
+  const people = await getPeople(params.id).catch(() => undefined)
+  if (!event || !people) notFound()
+
+  const { t, i18n } = await useTranslation(['common', 'event'])
+
+  return <>
+    <Content>
+      <h1 className={styles.name}>{event.name}</h1>
+      <span
+        className={styles.date}
+        title={Temporal.Instant.fromEpochSeconds(event.created_at).toLocaleString(i18n.language, { dateStyle: 'long' })}
+      >{t('common:created', { date: relativeTimeFormat(Temporal.Instant.fromEpochSeconds(event.created_at), i18n.language) })}</span>
+
+      <Copyable className={styles.info}>
+        {`https://crab.fit/${event.id}`}
+      </Copyable>
+      <p className={makeClass(styles.info, styles.noPrint)}>
+        <Trans i18nKey="event:nav.shareinfo" t={t} i18n={i18n}>_<a href={`mailto:?subject=${encodeURIComponent(t<string>('event:nav.email_subject', { event_name: event.name }))}&body=${encodeURIComponent(`${t('event:nav.email_body')} https://crab.fit/${event.id}`)}`}>_</a>_</Trans>
+      </p>
+    </Content>
+
+    <EventAvailabilities event={event} people={people} />
+  </>
+}
+
+export default Page
diff --git a/frontend/src/components/Copyable/Copyable.module.scss b/frontend/src/components/Copyable/Copyable.module.scss
new file mode 100644
index 0000000..a988948
--- /dev/null
+++ b/frontend/src/components/Copyable/Copyable.module.scss
@@ -0,0 +1,7 @@
+.copyable {
+  cursor: pointer;
+
+  &:hover {
+    color: var(--secondary);
+  }
+}
diff --git a/frontend/src/components/Copyable/Copyable.tsx b/frontend/src/components/Copyable/Copyable.tsx
new file mode 100644
index 0000000..e7f90e1
--- /dev/null
+++ b/frontend/src/components/Copyable/Copyable.tsx
@@ -0,0 +1,33 @@
+'use client'
+
+import { useState } from 'react'
+
+import { useTranslation } from '/src/i18n/client'
+import { makeClass } from '/src/utils'
+
+import styles from './Copyable.module.scss'
+
+interface CopyableProps extends Omit<React.ComponentProps<'p'>, 'children'> {
+  children: string
+}
+
+const Copyable = ({ children, className, ...props }: CopyableProps) => {
+  const { t } = useTranslation('event')
+
+  const [copied, setCopied] = useState<React.ReactNode>()
+
+  return <p
+    onClick={() => navigator.clipboard?.writeText(children)
+      .then(() => {
+        setCopied(t('nav.copied'))
+        setTimeout(() => setCopied(undefined), 1000)
+      })
+      .catch(e => console.error('Failed to copy', e))
+    }
+    title={navigator.clipboard ? t<string>('nav.title') : undefined}
+    className={makeClass(className, 'clipboard' in navigator && styles.copyable)}
+    {...props}
+  >{copied ?? children}</p>
+}
+
+export default Copyable
diff --git a/frontend/src/components/CreateForm/CreateForm.tsx b/frontend/src/components/CreateForm/CreateForm.tsx
index a8ff770..83d9a57 100644
--- a/frontend/src/components/CreateForm/CreateForm.tsx
+++ b/frontend/src/components/CreateForm/CreateForm.tsx
@@ -12,7 +12,7 @@ import { default as ErrorAlert } from '/src/components/Error/Error'
 import SelectField from '/src/components/SelectField/SelectField'
 import TextField from '/src/components/TextField/TextField'
 import TimeRangeField from '/src/components/TimeRangeField/TimeRangeField'
-import { API_BASE, EventResponse } from '/src/config/api'
+import { createEvent, EventResponse } from '/src/config/api'
 import { useTranslation } from '/src/i18n/client'
 import timezones from '/src/res/timezones.json'
 import useRecentsStore from '/src/stores/recentsStore'
@@ -94,22 +94,10 @@ const CreateForm = ({ noRedirect }: { noRedirect?: boolean }) => {
         return setError(t('form.errors.no_time'))
       }
 
-      const res = await fetch(new URL('/event', API_BASE), {
-        method: 'POST',
-        headers: { 'Content-Type': 'application/json' },
-        body: JSON.stringify({
-          name,
-          times,
-          timezone,
-        }),
-      })
-
-      if (!res.ok) {
-        console.error(res)
+      const newEvent = await createEvent({ name, times, timezone }).catch(e => {
+        console.error(e)
         throw new Error('Failed to create event')
-      }
-
-      const newEvent = EventResponse.parse(await res.json())
+      })
 
       if (noRedirect) {
         // Show event link
diff --git a/frontend/src/components/CreateForm/components/EventInfo/EventInfo.module.scss b/frontend/src/components/CreateForm/components/EventInfo/EventInfo.module.scss
index 911322d..e977ea7 100644
--- a/frontend/src/components/CreateForm/components/EventInfo/EventInfo.module.scss
+++ b/frontend/src/components/CreateForm/components/EventInfo/EventInfo.module.scss
@@ -9,11 +9,3 @@
   font-size: 15px;
   padding: 10px 0;
 }
-
-.copyable {
-  cursor: pointer;
-
-  &:hover {
-    color: var(--secondary);
-  }
-}
diff --git a/frontend/src/components/CreateForm/components/EventInfo/EventInfo.tsx b/frontend/src/components/CreateForm/components/EventInfo/EventInfo.tsx
index ccaad6e..e589cb6 100644
--- a/frontend/src/components/CreateForm/components/EventInfo/EventInfo.tsx
+++ b/frontend/src/components/CreateForm/components/EventInfo/EventInfo.tsx
@@ -1,9 +1,8 @@
-import { useState } from 'react'
 import { Trans } from 'react-i18next/TransWithoutContext'
 
+import Copyable from '/src/components/Copyable/Copyable'
 import { EventResponse } from '/src/config/api'
 import { useTranslation } from '/src/i18n/client'
-import { makeClass } from '/src/utils'
 
 import styles from './EventInfo.module.scss'
 
@@ -14,21 +13,11 @@ interface EventInfoProps {
 const EventInfo = ({ event }: EventInfoProps) => {
   const { t, i18n } = useTranslation('event')
 
-  const [copied, setCopied] = useState<React.ReactNode>()
-
   return <div className={styles.wrapper}>
     <h2>{event.name}</h2>
-    <p
-      className={makeClass(styles.info, styles.copyable)}
-      onClick={() => navigator.clipboard?.writeText(`https://crab.fit/${event.id}`)
-        .then(() => {
-          setCopied(t('nav.copied'))
-          setTimeout(() => setCopied(undefined), 1000)
-        })
-        .catch(e => console.error('Failed to copy', e))
-      }
-      title={navigator.clipboard ? t<string>('nav.title') : undefined}
-    >{copied ?? `https://crab.fit/${event.id}`}</p>
+    <Copyable className={styles.info}>
+      {`https://crab.fit/${event.id}`}
+    </Copyable>
     <p className={styles.info}>
       <Trans i18nKey="event:nav.shareinfo_alt" t={t} i18n={i18n}>_<a href={`mailto:?subject=${encodeURIComponent(t<string>('nav.email_subject', { event_name: event.name }))}&body=${encodeURIComponent(`${t('nav.email_body')} https://crab.fit/${event.id}`)}`} target="_blank">_</a>_</Trans>
     </p>
diff --git a/frontend/src/components/Login/Login.module.scss b/frontend/src/components/Login/Login.module.scss
new file mode 100644
index 0000000..307631c
--- /dev/null
+++ b/frontend/src/components/Login/Login.module.scss
@@ -0,0 +1,23 @@
+.form {
+  display: grid;
+  grid-template-columns: 1fr 1fr auto;
+  align-items: flex-end;
+  grid-gap: 18px;
+
+  @media (max-width: 500px) {
+    grid-template-columns: 1fr 1fr;
+  }
+  @media (max-width: 400px) {
+    grid-template-columns: 1fr;
+
+    & div:last-child {
+      --btn-width: 100%;
+    }
+  }
+}
+
+.info {
+  margin: 18px 0;
+  opacity: .75;
+  font-size: 12px;
+}
diff --git a/frontend/src/components/Login/Login.tsx b/frontend/src/components/Login/Login.tsx
new file mode 100644
index 0000000..8aa64ff
--- /dev/null
+++ b/frontend/src/components/Login/Login.tsx
@@ -0,0 +1,100 @@
+import { useCallback, useEffect, useState } from 'react'
+import { SubmitHandler, useForm } from 'react-hook-form'
+
+import Button from '/src/components/Button/Button'
+import Error from '/src/components/Error/Error'
+import TextField from '/src/components/TextField/TextField'
+import { getPerson, PersonResponse } from '/src/config/api'
+import { useTranslation } from '/src/i18n/client'
+
+import styles from './Login.module.scss'
+
+const defaultValues = {
+  username: '',
+  password: '',
+}
+
+interface LoginProps {
+  eventId: string
+  user: PersonResponse | undefined
+  onChange: (user: PersonResponse | undefined, password?: string) => void
+}
+
+const Login = ({ eventId, user, onChange }: LoginProps) => {
+  const { t } = useTranslation('event')
+
+  const {
+    register,
+    handleSubmit,
+    setFocus,
+    reset,
+    setValue,
+  } = useForm({ defaultValues })
+
+  const [error, setError] = useState<React.ReactNode>()
+  const [isLoading, setIsLoading] = useState(false)
+
+  const focusName = useCallback(() => setFocus('username'), [setFocus])
+  useEffect(() => {
+    document.addEventListener('focusName', focusName)
+    return () => document.removeEventListener('focusName', focusName)
+  }, [])
+
+  const onSubmit: SubmitHandler<typeof defaultValues> = async ({ username, password }) => {
+    if (username.length === 0) {
+      focusName()
+      return setError(t('form.errors.name_required'))
+    }
+
+    setIsLoading(true)
+    setError(undefined)
+
+    try {
+      const resUser = await getPerson(eventId, username, password || undefined)
+      onChange(resUser, password || undefined)
+      reset()
+    } catch (e) {
+      if (e && typeof e === 'object' && 'status' in e && e.status === 401) {
+        setError(t('form.errors.password_incorrect'))
+        setValue('password', '')
+      } else {
+        setError(t('form.errors.unknown'))
+      }
+    } finally {
+      setIsLoading(false)
+    }
+  }
+
+  return user ? <div style={{ display: 'flex', alignItems: 'center', justifyContent: 'space-between', margin: '20px 0', flexWrap: 'wrap', gap: '10px' }}>
+    <h2 style={{ margin: 0 }}>{t('form.signed_in', { name: user.name })}</h2>
+    <Button isSmall onClick={() => onChange(undefined)}>{t('form.logout_button')}</Button>
+  </div> : <>
+    <h2>{t('form.signed_out')}</h2>
+    <form className={styles.form} onSubmit={handleSubmit(onSubmit)}>
+      <TextField
+        label={t('form.name')}
+        type="text"
+        isInline
+        required
+        {...register('username')}
+      />
+
+      <TextField
+        label={t('form.password')}
+        type="password"
+        isInline
+        {...register('password')}
+      />
+
+      <Button
+        type="submit"
+        isLoading={isLoading}
+        disabled={isLoading}
+      >{t('form.button')}</Button>
+    </form>
+    <Error onClose={() => setError(undefined)}>{error}</Error>
+    <p className={styles.info}>{t('form.info')}</p>
+  </>
+}
+
+export default Login
diff --git a/frontend/src/components/Stats/Stats.tsx b/frontend/src/components/Stats/Stats.tsx
index df2addd..1366904 100644
--- a/frontend/src/components/Stats/Stats.tsx
+++ b/frontend/src/components/Stats/Stats.tsx
@@ -1,17 +1,10 @@
-import { API_BASE, StatsResponse } from '/src/config/api'
+import { getStats } from '/src/config/api'
 import { useTranslation } from '/src/i18n/server'
 
 import styles from './Stats.module.scss'
 
-const getStats = async () => {
-  const res = await fetch(new URL('/stats', API_BASE))
-    .catch(console.warn)
-  if (!res?.ok) return
-  return StatsResponse.parse(await res.json())
-}
-
 const Stats = async () => {
-  const stats = await getStats()
+  const stats = await getStats().catch(() => undefined)
   const { t } = await useTranslation('home')
 
   return stats ? <div className={styles.wrapper}>
diff --git a/frontend/src/components/index.ts b/frontend/src/components/index.ts
deleted file mode 100644
index 71ee668..0000000
--- a/frontend/src/components/index.ts
+++ /dev/null
@@ -1,18 +0,0 @@
-// export { default as TextField } from './TextField/TextField'
-// export { default as SelectField } from './SelectField/SelectField'
-// export { default as CalendarField } from './CalendarField/CalendarField'
-// export { default as TimeRangeField } from './TimeRangeField/TimeRangeField'
-// export { default as ToggleField } from './ToggleField/ToggleField'
-
-// export { default as Legend } from './Legend/Legend'
-// export { default as AvailabilityViewer } from './AvailabilityViewer/AvailabilityViewer'
-// export { default as AvailabilityEditor } from './AvailabilityEditor/AvailabilityEditor'
-// export { default as Loading } from './Loading/Loading'
-
-// export { default as Center } from './Center/Center'
-// export { default as Settings } from './Settings/Settings'
-// export { default as Egg } from './Egg/Egg'
-// export { default as TranslateDialog } from './TranslateDialog/TranslateDialog'
-
-// export const _GoogleCalendar = () => import('./GoogleCalendar/GoogleCalendar')
-// export const _OutlookCalendar = () => import('./OutlookCalendar/OutlookCalendar')
diff --git a/frontend/src/config/api.ts b/frontend/src/config/api.ts
index daa4abd..4c172ab 100644
--- a/frontend/src/config/api.ts
+++ b/frontend/src/config/api.ts
@@ -1,4 +1,4 @@
-// TODO: Write a simple rust crate that generates these from the OpenAPI spec
+// TODO: Potentially write a simple rust crate that generates these from the OpenAPI spec
 
 import { z } from 'zod'
 
@@ -6,7 +6,7 @@ if (process.env.NEXT_PUBLIC_API_URL === undefined) {
   throw new Error('Expected API url environment variable')
 }
 
-export const API_BASE = new URL(process.env.NEXT_PUBLIC_API_URL)
+const API_BASE = new URL(process.env.NEXT_PUBLIC_API_URL)
 
 export const EventInput = z.object({
   name: z.string().optional(),
@@ -42,3 +42,38 @@ export const StatsResponse = z.object({
   version: z.string(),
 })
 export type StatsResponse = z.infer<typeof StatsResponse>
+
+const get = async <S extends z.Schema>(url: string, schema: S, auth?: string): Promise<ReturnType<S['parse']>> => {
+  const res = await fetch(new URL(url, API_BASE), {
+    headers: {
+      ...auth && { Authorization: `Bearer ${auth}` },
+    }
+  })
+    .catch(console.warn)
+  if (!res?.ok) throw res
+  return schema.parse(await res.json())
+}
+
+const post = async <S extends z.Schema>(url: string, schema: S, input: unknown, auth?: string, method = 'POST'): Promise<ReturnType<S['parse']>> => {
+  const res = await fetch(new URL(url, API_BASE), {
+    method,
+    headers: {
+      'Content-Type': 'application/json',
+      ...auth && { Authorization: `Bearer ${auth}` },
+    },
+    body: JSON.stringify(input),
+  })
+    .catch(console.warn)
+  if (!res?.ok) throw res
+  return schema.parse(await res.json())
+}
+
+// Get
+export const getStats = () => get('/stats', StatsResponse)
+export const getEvent = (eventId: string) => get(`/event/${eventId}`, EventResponse)
+export const getPeople = (eventId: string) => get(`/event/${eventId}/people`, PersonResponse.array())
+export const getPerson = (eventId: string, personName: string, password?: string) => get(`/event/${eventId}/people/${personName}`, PersonResponse, password && btoa(password))
+
+// Post
+export const createEvent = (input: EventInput) => post('/event', EventResponse, EventInput.parse(input))
+export const updatePerson = (eventId: string, personName: string, input: PersonInput, password?: string) => post(`/event/${eventId}/people/${personName}`, PersonResponse, PersonInput.parse(input), password && btoa(password), 'PATCH')
diff --git a/frontend/src/utils/expandTimes.ts b/frontend/src/utils/expandTimes.ts
new file mode 100644
index 0000000..09baa9f
--- /dev/null
+++ b/frontend/src/utils/expandTimes.ts
@@ -0,0 +1,13 @@
+/**
+ * Takes times as strings that start with `HH00-`, and adds 15, 30 and 45 minute variants
+ */
+export const expandTimes = (times: string[]) =>
+  times.flatMap(time => {
+    const [hour, rest] = [time.substring(0, 2), time.substring(4)]
+    return [
+      `${hour}00${rest}`,
+      `${hour}15${rest}`,
+      `${hour}30${rest}`,
+      `${hour}45${rest}`,
+    ]
+  })
diff --git a/frontend/src/utils/index.ts b/frontend/src/utils/index.ts
index 35ef3d5..266a34c 100644
--- a/frontend/src/utils/index.ts
+++ b/frontend/src/utils/index.ts
@@ -7,3 +7,4 @@ export * from './calculateRows'
 export * from './calculateColumns'
 export * from './getWeekdayNames'
 export * from './relativeTimeFormat'
+export * from './expandTimes'