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use std::str::from_utf8;
use geo_types::{Point};
use crate::decode::Decode;
use crate::error::UnexpectedNullError;
use crate::postgres::{PgTypeInfo, Postgres};
use crate::Result;
use crate::types::BigDecimal;
use crate::value::RawValue;
#[derive(Debug, Copy, Clone)]
pub enum PgData<'c> {
Binary(&'c [u8]),
Text(&'c str),
}
#[derive(Debug, Clone)]
pub struct PgValue<'c> {
type_info: Option<PgTypeInfo>,
data: Option<PgData<'c>>,
}
impl<'c> PgValue<'c> {
pub(crate) fn try_get(&self) -> crate::Result<PgData<'c>> {
match self.data {
Some(data) => Ok(data),
None => Err(crate::Error::decode(UnexpectedNullError)),
}
}
#[inline]
pub fn get(&self) -> Option<PgData<'c>> {
self.data
}
pub(crate) fn null() -> Self {
Self {
type_info: None,
data: None,
}
}
pub(crate) fn bytes(type_info: PgTypeInfo, buf: &'c [u8]) -> Self {
Self {
type_info: Some(type_info),
data: Some(PgData::Binary(buf)),
}
}
pub(crate) fn utf8(type_info: PgTypeInfo, buf: &'c [u8]) -> crate::Result<Self> {
Ok(Self {
type_info: Some(type_info),
data: Some(PgData::Text(from_utf8(&buf).map_err(crate::Error::decode)?)),
})
}
#[cfg(test)]
pub(crate) fn from_bytes(buf: &'c [u8]) -> Self {
Self {
type_info: None,
data: Some(PgData::Binary(buf)),
}
}
pub(crate) fn from_str(s: &'c str) -> Self {
Self {
type_info: None,
data: Some(PgData::Text(s)),
}
}
}
impl<'c> RawValue<'c> for PgValue<'c> {
type Database = Postgres;
fn type_info(&self) -> Option<PgTypeInfo> {
if matches!(self.data, Some(PgData::Binary(_))) {
self.type_info.clone()
} else {
None
}
}
fn try_to_json(&self) -> Result<serde_json::Value> {
if self.type_info.is_none() {
return Ok(serde_json::Value::Null);
}
let type_string = format!("{}", self.type_info.as_ref().unwrap());
match type_string.as_str() {
"NUMERIC" => {
let r: crate::Result<BigDecimal> = Decode::<'_, Postgres>::decode(self.clone());
if r.is_err() {
return Err(r.err().unwrap());
}
return Ok(serde_json::Value::from(r.unwrap().to_string()));
}
"BOOL" => {
let r: crate::Result<bool> = Decode::<'_, Postgres>::decode(self.clone());
if r.is_err() {
return Err(r.err().unwrap());
}
return Ok(serde_json::Value::from(r.unwrap()));
}
"BYTEA" => {
unimplemented!();
}
"FLOAT4" => {
let r: crate::Result<f32> = Decode::<'_, Postgres>::decode(self.clone());
if r.is_err() {
return Err(r.err().unwrap());
}
return Ok(serde_json::Value::from(r.unwrap()));
}
"FLOAT8" => {
let r: crate::Result<f64> = Decode::<'_, Postgres>::decode(self.clone());
if r.is_err() {
return Err(r.err().unwrap());
}
return Ok(serde_json::Value::from(r.unwrap()));
}
"INT2" => {
let r: crate::Result<i16> = Decode::<'_, Postgres>::decode(self.clone());
if r.is_err() {
return Err(r.err().unwrap());
}
return Ok(serde_json::Value::from(r.unwrap()));
}
"INT4" => {
let r: crate::Result<i32> = Decode::<'_, Postgres>::decode(self.clone());
if r.is_err() {
return Err(r.err().unwrap());
}
return Ok(serde_json::Value::from(r.unwrap()));
}
"INT8" => {
let r: crate::Result<i64> = Decode::<'_, Postgres>::decode(self.clone());
if r.is_err() {
return Err(r.err().unwrap());
}
return Ok(serde_json::Value::from(r.unwrap()));
}
"TEXT" | "VARCHAR" | "BPCHAR" | "CHAR" => {
let r: crate::Result<String> = Decode::<'_, Postgres>::decode(self.clone());
if r.is_err() {
return Err(r.err().unwrap());
}
return Ok(serde_json::Value::from(r.unwrap()));
}
"UUID" => {
let r: crate::Result<String> = Decode::<'_, Postgres>::decode(self.clone());
if r.is_err() {
return Err(r.err().unwrap());
}
return Ok(serde_json::Value::from(r.unwrap()));
}
"TIME" => {
let r: crate::Result<chrono::NaiveTime> = Decode::<'_, Postgres>::decode(self.clone());
if r.is_err() {
return Err(r.err().unwrap());
}
let t = serde_json::to_value(&r.unwrap());
return Ok(t.unwrap_or(serde_json::Value::Null));
}
"DATE" => {
let r: crate::Result<chrono::NaiveDate> = Decode::<'_, Postgres>::decode(self.clone());
if r.is_err() {
return Err(r.err().unwrap());
}
let t = serde_json::to_value(&r.unwrap());
return Ok(t.unwrap_or(serde_json::Value::Null));
}
"TIMESTAMP" => {
let r: crate::Result<chrono::NaiveDateTime> = Decode::<'_, Postgres>::decode(self.clone());
if r.is_err() {
return Err(r.err().unwrap());
}
let t = serde_json::to_value(&r.unwrap());
return Ok(t.unwrap_or(serde_json::Value::Null));
}
"TIMESTAMPTZ" => {
let r: crate::Result<chrono::NaiveDateTime> = Decode::<'_, Postgres>::decode(self.clone());
if r.is_err() {
return Err(r.err().unwrap());
}
let t = serde_json::to_value(&r.unwrap());
return Ok(t.unwrap_or(serde_json::Value::Null));
}
"POINT" =>{
let r: crate::Result<Point<f64>> = Decode::<'_, Postgres>::decode(self.clone());
if r.is_err() {
return Err(r.err().unwrap());
}
let t = serde_json::to_value(&r.unwrap());
return Ok(t.unwrap_or(serde_json::Value::Null));
}
_ => return Err(crate::Error::from(format!("un support database type for:{:?}!", type_string))),
}
}
}