frontend/components/ui/form/useFormField.ts

import {
    FieldContextKey,
    useFieldError,
    useIsFieldDirty,
    useIsFieldTouched,
    useIsFieldValid,
} from "vee-validate";
import { inject } from "vue";
import { FORM_ITEM_INJECTION_KEY } from "./injectionKeys";

export function useFormField() {
    const fieldContext = inject(FieldContextKey);
    const fieldItemContext = inject(FORM_ITEM_INJECTION_KEY);

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

    const { name } = fieldContext;
    const id = fieldItemContext;

    const fieldState = {
        valid: useIsFieldValid(name),
        isDirty: useIsFieldDirty(name),
        isTouched: useIsFieldTouched(name),
        error: useFieldError(name),
    };

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