use std::fmt::Debug;
use std::io::Cursor;
use crate::{
ewkb::{read_ewkb_header, write_ewkb_header, EwkbSerializable, GeometryType, BIG_ENDIAN},
points::Dimension,
polygon::{read_polygon_body, write_polygon},
types::*,
};
use byteorder::{BigEndian, LittleEndian, ReadBytesExt, WriteBytesExt};
use diesel::{
deserialize::{self, FromSql},
pg::{self, Pg},
serialize::{self, IsNull, Output, ToSql},
};
use crate::sql_types::*;
impl<T> MultiPolygon<T>
where
T: PointT + Clone,
{
pub fn new(srid: Option<u32>) -> Self {
Self::with_capacity(srid, 0)
}
pub fn with_capacity(srid: Option<u32>, cap: usize) -> Self {
MultiPolygon {
polygons: Vec::with_capacity(cap),
srid,
}
}
pub fn add_empty_polygon<'a>(&'a mut self) -> &mut Self {
self.add_empty_polygon_with_capacity(0)
}
pub fn add_empty_polygon_with_capacity<'a>(&'a mut self, cap: usize) -> &mut Self {
self.polygons.push(Polygon {
rings: Vec::with_capacity(cap),
srid: self.srid,
});
self
}
pub fn add_point<'a>(&'a mut self, point: T) -> &mut Self {
if self.polygons.is_empty() {
self.add_empty_polygon();
}
self.polygons.last_mut().unwrap().add_point(point);
self
}
pub fn add_points<'a>(&'a mut self, points: impl IntoIterator<Item = T>) -> &mut Self {
if self.polygons.is_empty() {
self.add_empty_polygon();
}
let last = self.polygons.last_mut().unwrap();
for point in points {
last.add_point(point);
}
self
}
pub fn dimension(&self) -> u32 {
let mut dimension = Dimension::None as u32;
if let Some(polygon) = self.polygons.first() {
dimension |= polygon.dimension();
}
dimension
}
}
impl<T> EwkbSerializable for MultiPolygon<T>
where
T: PointT + Clone,
{
fn geometry_type(&self) -> u32 {
let mut g_type = GeometryType::MultiPolygon as u32;
if let Some(polygon) = self.polygons.first() {
g_type |= polygon.dimension();
}
g_type
}
}
impl<T> ToSql<Geometry, Pg> for MultiPolygon<T>
where
T: PointT + Debug + PartialEq + Clone + EwkbSerializable,
{
fn to_sql(&self, out: &mut Output<Pg>) -> serialize::Result {
write_multi_polygon(self, self.srid, out)
}
}
impl<T> ToSql<Geography, Pg> for MultiPolygon<T>
where
T: PointT + Debug + PartialEq + Clone + EwkbSerializable,
{
fn to_sql(&self, out: &mut Output<Pg>) -> serialize::Result {
write_multi_polygon(self, self.srid, out)
}
}
impl<T> FromSql<Geometry, Pg> for MultiPolygon<T>
where
T: PointT + Debug + Clone,
{
fn from_sql(bytes: pg::PgValue) -> deserialize::Result<Self> {
let mut r = Cursor::new(bytes.as_bytes());
let end = r.read_u8()?;
if end == BIG_ENDIAN {
read_multi_polygon::<BigEndian, T>(&mut r)
} else {
read_multi_polygon::<LittleEndian, T>(&mut r)
}
}
}
impl<T> FromSql<Geography, Pg> for MultiPolygon<T>
where
T: PointT + Debug + Clone,
{
fn from_sql(bytes: pg::PgValue) -> deserialize::Result<Self> {
FromSql::<Geometry, Pg>::from_sql(bytes)
}
}
pub fn write_multi_polygon<T>(
multipolygon: &MultiPolygon<T>,
srid: Option<u32>,
out: &mut Output<Pg>,
) -> serialize::Result
where
T: PointT + EwkbSerializable + Clone,
{
write_ewkb_header(multipolygon, srid, out)?;
out.write_u32::<LittleEndian>(multipolygon.polygons.len() as u32)?;
for polygon in multipolygon.polygons.iter() {
write_polygon(polygon, None, out)?;
}
Ok(IsNull::No)
}
fn read_multi_polygon<T, P>(cursor: &mut Cursor<&[u8]>) -> deserialize::Result<MultiPolygon<P>>
where
T: byteorder::ByteOrder,
P: PointT + Clone,
{
let g_header = read_ewkb_header::<T>(cursor)?.expect(GeometryType::MultiPolygon)?;
read_multi_polygon_body::<T, P>(g_header.g_type, g_header.srid, cursor)
}
pub fn read_multi_polygon_body<T, P>(
g_type: u32,
srid: Option<u32>,
cursor: &mut Cursor<&[u8]>,
) -> deserialize::Result<MultiPolygon<P>>
where
T: byteorder::ByteOrder,
P: PointT + Clone,
{
let polygons_n = cursor.read_u32::<T>()?;
let mut polygon = MultiPolygon::with_capacity(srid, polygons_n as usize);
for _i in 0..polygons_n {
cursor.read_u8()?;
cursor.read_u32::<T>()?;
polygon
.polygons
.push(read_polygon_body::<T, P>(g_type, srid, cursor)?);
}
Ok(polygon)
}