src/lib/form_utils.ts


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export interface Error {
  field_div_id: string;
  field_input_id: string;
  message: string;
}

export function deleteEmptyFields(form: FormData) {
  const trimmed_form = new FormData();

  for(const key of form.keys()) {
    if(form.get(key) != '')
      trimmed_form.append(key, form.get(key));
  }

  return trimmed_form;
}

export function setFormErrorsInSessionStorage(errors: Array<any>) {
    for(const [key, value] of Object.entries(errors)) {
      sessionStorage.setItem(key, value);
    }
}

export function formHasErrors(fields: Array<string>) {
  for(const field_key of fields) {
    if(sessionStorage.getItem(field_key))
      return true;
  }

  return false;
}

export function renderErrors(errors: Array<Error>) {
  for(const error of errors) {
    const field_div = document.getElementById(error.field_div_id);
    const input_label = field_div?.querySelector("label");
    const input_field = field_div?.querySelector("input");
    input_label?.classList.add("text-red-700");
    input_field?.classList.add("bg-red-50 border border-red-500 text-red-900 placeholder-red-700 focus:ring-red-500 dark:bg-gray-700 focus:border-red-500");
  }
}