Prestashop 1.7 - City field as dropdown or autocomplete - prestashop

Question

I am using Prestashop 1.7 and I need to change the city input field.
I have a billing software that only allows me to use predefined cities. So I have created a table ps_cities with the entries (id an city name).
I know how to write a dropdown or a autocomplete script, but I do not know where to change the input type in the Prestashop files.
On the 1.6 version you have the input field in a theme file, but somehow I fail to find in the new version.

Answer 1

In PrestaShop 1.7.7.X I've created a module that includes some new (and cool!) hooks like showing below. I consider this one a good option because it will be easier to maintain in the next PrestaShop releases.
Some assumptions here: I created a relationship model CityAddress with two fields id_city and id_address and a City model with fields like name, id_state, id_country, also I continued using Address::city string name for compatibility.
/**
* #see /classes/form/CustomerAddressFormatter.php#L156
* #param array $param [
* #var array $fields
* ]
*/
public function hookAdditionalCustomerAddressFields($params)
{
($params['fields']['city'])->setType('hidden');
// New field
$formField = $params['fields'];
$formField = (new FormField())
->setName('id_city')
->setLabel($this->l('City'))
->setRequired(true)
->setType('select')
;
// If an address already exits, select the default city
if (Tools::getIsset('id_address')) {
$address = new Address(Tools::getValue('id_address'));
if (!empty($address->id_state)) {
$cities = City::getCitiesByIdState((int) $address->id_state);
if (!empty($cities)) {
foreach ($cities as $city) {
$formField->addAvailableValue(
$city['id_city'],
$city['name']
);
}
$id_city = CityAddress::getIdCityByIdAddress((int) $address->id);
$formField->setValue($id_city);
}
}
}
// Add the id_city field in the position of the city field
$keys = array_keys($params['fields']);
$search = 'city';
foreach ($keys as $key => $value) {
if ($value == $search) {
break;
}
}
$part1 = array_slice($params['fields'], 0, $key + 1);
$part2 = array_slice($params['fields'], $key + 1);
$part1['id_city'] = $formField;
$params['fields'] = array_merge($part1, $part2);
}
This one to validate the field:
/**
* #see /classes/form/CustomerAddressForm.php#L123
* #param array $param [
* #var CustomerAddressForm $form
* ]
*/
public function hookActionValidateCustomerAddressForm($params)
{
if (empty(Tools::getValue('id_city'))
|| empty(Tools::getValue('city'))) {
return false;
}
$form = $params['form'];
$idCityField = $form->getField('id_city');
$idCity = (int) Tools::getValue('id_city');
$cityObj = new City($idCity);
$city = pSQL(Tools::getValue('city'));
if ($cityObj->name !== $city) {
$idCityField->addError(sprintf(
$this->l('Invalid name in field id_city %s and city %s'),
$cityObj->name,
$city
));
return false;
}
return true;
}
And the submitted field:
/**
* #see /classes/form/CustomerAddressForm.php#L153
* #param array $param [
* #var Address $address
* ]
*/
public function hookActionSubmitCustomerAddressForm($params)
{
/** #var Address */
$address = $params['address'];
$address->save();
if (!Validate::isLoadedObject($address)) {
throw new PrestaShopException($this->l('Address object error while trying to save city'));
}
// If address has a previous value then update it
$cityAddress = CityAddress::getCityAddressByIdAddress((int) $address->id);
$city = City::getCityByNameAndIdState($address->city, $address->id_state);
$cityAddress->id_city = $city->id;
$cityAddress->id_address = $address->id;
$cityAddress->save();
}
It is possible if you have this line in the additionalCustomerAddressFields hook:
https://github.com/PrestaShop/PrestaShop/blob/develop/classes/form/CustomerAddressFormatter.php#L150
For previous version I included ['fields' => &$format] as a parameter.

Answer 2

You can find all form fields of the Front Office in your theme's /templates/_partials/form-fields.tpl file