# All files / src/components/ui form.tsx

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     "use client"

    import * as React from "react"
    import * as LabelPrimitive from "@radix-ui/react-label"
    import { Slot } from "@radix-ui/react-slot"
    import {
      Controller,
      FormProvider,
      useFormContext,
      useFormState,
      type ControllerProps,
      type FieldPath,
      type FieldValues} from "react-hook-form"

    import { cn } from "@/lib/utils"
    import { Label } from "@/components/ui/label"

    const Form = FormProvider

    type FormFieldContextValue<
      TFieldValues extends FieldValues = FieldValues,
      TName extends FieldPath<TFieldValues> = FieldPath<TFieldValues>,
    > = {
      name: TName
    }

    const FormFieldContext = React.createContext<FormFieldContextValue>(
      {} as FormFieldContextValue
    )

    const FormField = <
      TFieldValues extends FieldValues = FieldValues,
      TName extends FieldPath<TFieldValues> = FieldPath<TFieldValues>,
    >({
      ...props
    }: ControllerProps<TFieldValues, TName>) => {
      return (
        <FormFieldContext.Provider value={{ name: props.name }}>
          <Controller {...props} />
        </FormFieldContext.Provider>
      )
    }

    const useFormField = () => {
      const fieldContext = React.useContext(FormFieldContext)
      const itemContext = React.useContext(FormItemContext)
      const { getFieldState } = useFormContext()
      const formState = useFormState({ name: fieldContext.name })
      const fieldState = getFieldState(fieldContext.name, formState)

      if (!fieldContext) {
        throw new Error("useFormField should be used within <FormField>")
      }

      const { id } = itemContext

      return {
        id,
        name: fieldContext.name,
        formItemId: `${id}-form-item`,
        formDescriptionId: `${id}-form-item-description`,
        formMessageId: `${id}-form-item-message`,
        ...fieldState}
    }

    type FormItemContextValue = {
      id: string
    }

    const FormItemContext = React.createContext<FormItemContextValue>(
      {} as FormItemContextValue
    )

    function FormItem({ className, ...props }: React.ComponentProps<"div">) {
      const id = React.useId()

      return (
        <FormItemContext.Provider value={{ id }}>
          <div
            data-slot="form-item"
            className={cn("grid gap-2", className)}
            {...props}
          />
        </FormItemContext.Provider>
      )
    }

    function FormLabel({
      className,
      ...props
    }: React.ComponentProps<typeof LabelPrimitive.Root>) {
      const { error, formItemId } = useFormField()

      return (
        <Label
          data-slot="form-label"
          data-error={!!error}
          className={cn("data-[error=true]:text-destructive", className)}
          htmlFor={formItemId}
          {...props}
        />
      )
    }

    function FormControl({ ...props }: React.ComponentProps<typeof Slot>) {
      const { error, formItemId, formDescriptionId, formMessageId } = useFormField()

      return (
        <Slot
          data-slot="form-control"
          id={formItemId}
          aria-describedby={
            !error
              ? `${formDescriptionId}`
              : `${formDescriptionId} ${formMessageId}`
          }
          aria-invalid={!!error}
          {...props}
        />
      )
    }

    function FormDescription({ className, ...props }: React.ComponentProps<"p">) {
      const { formDescriptionId } = useFormField()

      return (
        <p
          data-slot="form-description"
          id={formDescriptionId}
          className={cn("text-muted-foreground text-sm", className)}
          {...props}
        />
      )
    }

    function FormMessage({ className, ...props }: React.ComponentProps<"p">) {
      const { error, formMessageId } = useFormField()
      const body = error ? String(error?.message ?? "") : props.children

      if (!body) {
        return null
      }

      return (
        <p
          data-slot="form-message"
          id={formMessageId}
          className={cn("text-destructive text-sm", className)}
          {...props}
        >
          {body}
        </p>
      )
    }

    export {
      useFormField,
      Form,
      FormItem,
      FormLabel,
      FormControl,
      FormDescription,
      FormMessage,
      FormField}