supabase/apps/design-system/registry/default/example/combobox-form.tsx

'use client'

import { zodResolver } from '@hookform/resolvers/zod'
import { Check, ChevronsUpDown } from 'lucide-react'
import { useForm } from 'react-hook-form'
import { toast } from 'sonner'
import { z } from 'zod'

import { cn } from '@/lib/utils'
import {
  Button,
  Command_Shadcn_,
  CommandEmpty_Shadcn_,
  CommandGroup_Shadcn_,
  CommandInput_Shadcn_,
  CommandItem_Shadcn_,
  CommandList_Shadcn_,
} from 'ui'
import {
  Form_Shadcn_,
  FormControl_Shadcn_,
  FormDescription_Shadcn_,
  FormField_Shadcn_,
  FormItem_Shadcn_,
  FormLabel_Shadcn_,
  FormMessage_Shadcn_,
  Popover_Shadcn_,
  PopoverContent_Shadcn_,
  PopoverTrigger_Shadcn_,
} from 'ui'

const languages = [
  { label: 'English', value: 'en' },
  { label: 'French', value: 'fr' },
  { label: 'German', value: 'de' },
  { label: 'Spanish', value: 'es' },
  { label: 'Portuguese', value: 'pt' },
  { label: 'Russian', value: 'ru' },
  { label: 'Japanese', value: 'ja' },
  { label: 'Korean', value: 'ko' },
  { label: 'Chinese', value: 'zh' },
] as const

const FormSchema = z.object({
  language: z.string({
    required_error: 'Please select a language.',
  }),
})

export default function ComboboxForm() {
  const form = useForm<z.infer<typeof FormSchema>>({
    resolver: zodResolver(FormSchema),
  })

  function onSubmit(data: z.infer<typeof FormSchema>) {
    toast('You submitted the following values:', {
      description: (
        <pre className="mt-2 w-[340px] rounded-md bg-slate-950 p-4">
          <code className="text-white">{JSON.stringify(data, null, 2)}</code>
        </pre>
      ),
    })
  }

  return (
    <Form_Shadcn_ {...form}>
      <form onSubmit={form.handleSubmit(onSubmit)} className="space-y-6">
        <FormField_Shadcn_
          control={form.control}
          name="language"
          render={({ field }) => (
            <FormItem_Shadcn_ className="flex flex-col">
              <FormLabel_Shadcn_>Language</FormLabel_Shadcn_>
              <Popover_Shadcn_>
                <PopoverTrigger_Shadcn_ asChild>
                  <FormControl_Shadcn_>
                    <Button
                      type="default"
                      role="combobox"
                      className={cn(
                        'w-[200px] justify-between',
                        !field.value && 'text-muted-foreground'
                      )}
                      size="small"
                      iconRight={
                        <ChevronsUpDown
                          className="ml-2 h-4 w-4 shrink-0 opacity-50"
                          strokeWidth={1}
                        />
                      }
                    >
                      {field.value
                        ? languages.find((language) => language.value === field.value)?.label
                        : 'Select language'}
                    </Button>
                  </FormControl_Shadcn_>
                </PopoverTrigger_Shadcn_>
                <PopoverContent_Shadcn_ className="w-[200px] p-0">
                  <Command_Shadcn_>
                    <CommandInput_Shadcn_ placeholder="Search language..." />
                    <CommandList_Shadcn_>
                      <CommandEmpty_Shadcn_>No language found.</CommandEmpty_Shadcn_>
                      <CommandGroup_Shadcn_>
                        {languages.map((language) => (
                          <CommandItem_Shadcn_
                            value={language.label}
                            key={language.value}
                            onSelect={() => {
                              form.setValue('language', language.value)
                            }}
                          >
                            <Check
                              className={cn(
                                'mr-2 h-4 w-4',
                                language.value === field.value ? 'opacity-100' : 'opacity-0'
                              )}
                            />
                            {language.label}
                          </CommandItem_Shadcn_>
                        ))}
                      </CommandGroup_Shadcn_>
                    </CommandList_Shadcn_>
                  </Command_Shadcn_>
                </PopoverContent_Shadcn_>
              </Popover_Shadcn_>
              <FormDescription_Shadcn_>
                This is the language that will be used in the dashboard.
              </FormDescription_Shadcn_>
              <FormMessage_Shadcn_ />
            </FormItem_Shadcn_>
          )}
        />
        <Button htmlType="submit" type="secondary" size="small">
          Submit
        </Button>
      </form>
    </Form_Shadcn_>
  )
}