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use std::ffi::{CStr, CString};
use crate::ffi;
pub struct AddressParserResponse {
pub tokens: Vec<String>,
pub labels: Vec<String>,
}
impl AddressParserResponse {
pub fn new() -> AddressParserResponse {
AddressParserResponse {
tokens: Vec::new(),
labels: Vec::new(),
}
}
}
impl IntoIterator for AddressParserResponse {
type Item = (String, String);
type IntoIter = std::iter::Zip<std::vec::IntoIter<String>, std::vec::IntoIter<String>>;
fn into_iter(self) -> Self::IntoIter {
self.labels.into_iter().zip(self.tokens)
}
}
pub struct AddressParserOptions<'a> {
language: Option<&'a str>,
country: Option<&'a str>,
}
impl<'a> AddressParserOptions<'a> {
pub fn new(language: Option<&'a str>, country: Option<&'a str>) -> AddressParserOptions<'a> {
let (mut default_l, mut default_c) = (None, None);
if language.is_none() || country.is_none() {
let (l, c) = Self::get_default_options();
default_l = l;
default_c = c;
}
let language = language.or(default_l);
let country = country.or(default_c);
AddressParserOptions { language, country }
}
fn get_default_options() -> (Option<&'a str>, Option<&'a str>) {
let (mut language, mut country) = (None, None);
unsafe {
let options = ffi::libpostal_get_address_parser_default_options();
if !options.language.is_null() {
language = Some(CStr::from_ptr(options.language).to_str().unwrap());
}
if !options.country.is_null() {
country = Some(CStr::from_ptr(options.language).to_str().unwrap());
}
}
(language, country)
}
unsafe fn as_ffi_options(&self) -> ffi::libpostal_address_parser_options {
let (language, country): (*const libc::c_char, *const libc::c_char);
if self.language.is_none() {
language = std::ptr::null();
} else {
language = self.language.unwrap().as_ptr() as *const libc::c_char;
}
if self.country.is_none() {
country = std::ptr::null();
} else {
country = self.country.unwrap().as_ptr() as *const libc::c_char;
}
ffi::libpostal_address_parser_options { language, country }
}
}
pub fn parse_address(
address: &str,
language: Option<&str>,
country: Option<&str>,
) -> AddressParserResponse {
let address = CString::new(address).unwrap();
let mut response = AddressParserResponse::new();
let options = AddressParserOptions::new(language, country);
unsafe {
let options = options.as_ffi_options();
let raw = ffi::libpostal_parse_address(address.as_ptr() as *const libc::c_char, options);
if let Some(parsed) = raw.as_ref() {
for i in 0..parsed.num_components {
let component = CStr::from_ptr(*parsed.components.add(i));
let label = CStr::from_ptr(*parsed.labels.add(i));
response
.tokens
.push(String::from(component.to_str().unwrap()));
response.labels.push(String::from(label.to_str().unwrap()));
}
};
ffi::libpostal_address_parser_response_destroy(raw);
}
response
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn default_address_parser_options() {
let options = AddressParserOptions::new(None, None);
assert_eq!(options.language, None);
assert_eq!(options.country, None);
let options = AddressParserOptions::new(None, Some("EN"));
assert_eq!(options.language, None);
assert_eq!(options.country, Some("EN"));
}
}