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use {
super::{Value, ValueError},
crate::result::{Error, Result},
chrono::{offset::Utc, DateTime},
core::str::FromStr,
serde_json::{Map as JsonMap, Number as JsonNumber, Value as JsonValue},
std::collections::HashMap,
uuid::Uuid,
};
impl Value {
pub fn parse_json_map(value: &str) -> Result<Value> {
let value = serde_json::from_str(value).map_err(|_| ValueError::InvalidJsonString)?;
if !matches!(value, JsonValue::Object(_)) {
return Err(ValueError::JsonObjectTypeRequired.into());
}
value.try_into()
}
pub fn parse_json_list(value: &str) -> Result<Value> {
let value = serde_json::from_str(value).map_err(|_| ValueError::InvalidJsonString)?;
if !matches!(value, JsonValue::Array(_)) {
return Err(ValueError::JsonArrayTypeRequired.into());
}
value.try_into()
}
}
impl TryFrom<Value> for JsonValue {
type Error = Error;
fn try_from(value: Value) -> Result<Self> {
match value {
Value::Bool(v) => Ok(JsonValue::Bool(v)),
Value::I8(v) => Ok(v.into()),
Value::I16(v) => Ok(v.into()),
Value::I32(v) => Ok(v.into()),
Value::I64(v) => Ok(v.into()),
Value::I128(v) => JsonNumber::from_str(&v.to_string())
.map(JsonValue::Number)
.map_err(|_| ValueError::UnreachableJsonNumberParseFailure(v.to_string()).into()),
Value::U8(v) => Ok(v.into()),
Value::F64(v) => Ok(v.into()),
Value::Decimal(v) => JsonNumber::from_str(&v.to_string())
.map(JsonValue::Number)
.map_err(|_| ValueError::UnreachableJsonNumberParseFailure(v.to_string()).into()),
Value::Str(v) => Ok(v.into()),
Value::Bytea(v) => Ok(hex::encode(v).into()),
Value::Date(v) => Ok(v.to_string().into()),
Value::Timestamp(v) => Ok(DateTime::<Utc>::from_utc(v, Utc).to_string().into()),
Value::Time(v) => Ok(v.to_string().into()),
Value::Interval(v) => Ok(String::from(&v).into()),
Value::Uuid(v) => Ok(Uuid::from_u128(v).hyphenated().to_string().into()),
Value::Map(v) => v
.into_iter()
.map(|(key, value)| value.try_into().map(|value| (key, value)))
.collect::<Result<Vec<(String, JsonValue)>>>()
.map(|v| JsonMap::from_iter(v).into()),
Value::List(v) => v
.into_iter()
.map(|value| value.try_into())
.collect::<Result<Vec<JsonValue>>>()
.map(|v| v.into()),
Value::Null => Ok(JsonValue::Null),
}
}
}
impl TryFrom<JsonValue> for Value {
type Error = Error;
fn try_from(json_value: JsonValue) -> Result<Self> {
match json_value {
JsonValue::Null => Ok(Value::Null),
JsonValue::Bool(v) => Ok(Value::Bool(v)),
JsonValue::Number(v) => {
if let Some(value) = v.as_i64().map(Value::I64) {
return Ok(value);
}
v.as_f64().map(Value::F64).ok_or_else(|| {
ValueError::UnreachableJsonNumberParseFailure(v.to_string()).into()
})
}
JsonValue::String(v) => Ok(Value::Str(v)),
JsonValue::Array(json_array) => json_array
.into_iter()
.map(Value::try_from)
.collect::<Result<Vec<Value>>>()
.map(Value::List),
JsonValue::Object(json_map) => json_map
.into_iter()
.map(|(key, value)| value.try_into().map(|value| (key, value)))
.collect::<Result<HashMap<String, Value>>>()
.map(Value::Map),
}
}
}
#[cfg(test)]
mod tests {
use {
crate::data::{value::uuid::parse_uuid, Interval, Value, ValueError},
chrono::{NaiveDate, NaiveTime},
rust_decimal::Decimal,
serde_json::{json, Number as JsonNumber, Value as JsonValue},
};
#[test]
fn parse_json() {
assert_eq!(
Value::parse_json_map("[1, 2, 3]"),
Err(ValueError::JsonObjectTypeRequired.into())
);
assert_eq!(
Value::parse_json_list(r#"{ "a": 30 }"#),
Err(ValueError::JsonArrayTypeRequired.into())
);
}
#[test]
fn value_to_json() {
assert_eq!(Value::Bool(true).try_into(), Ok(JsonValue::Bool(true)));
assert_eq!(Value::I8(16).try_into(), Ok(JsonValue::Number(16.into())));
assert_eq!(
Value::I16(100).try_into(),
Ok(JsonValue::Number(100.into()))
);
assert_eq!(
Value::I32(100).try_into(),
Ok(JsonValue::Number(100.into()))
);
assert_eq!(
Value::I64(100).try_into(),
Ok(JsonValue::Number(100.into()))
);
assert_eq!(
Value::I128(100).try_into(),
Ok(JsonValue::Number(100.into()))
);
assert_eq!(Value::U8(100).try_into(), Ok(JsonValue::Number(100.into())));
assert!(JsonValue::try_from(Value::I128(i128::MAX)).is_ok());
assert_eq!(
Value::F64(1.23).try_into(),
Ok(JsonValue::Number(JsonNumber::from_f64(1.23).unwrap()))
);
assert_eq!(
Value::Decimal(Decimal::ONE).try_into(),
Ok(JsonValue::Number(1.into()))
);
assert_eq!(
Value::Str("abc".to_owned()).try_into(),
Ok(JsonValue::String("abc".to_owned()))
);
assert_eq!(
Value::Bytea(hex::decode("a1b2").unwrap()).try_into(),
Ok(JsonValue::String("a1b2".to_owned()))
);
assert_eq!(
Value::Date(NaiveDate::from_ymd(2020, 1, 3)).try_into(),
Ok(JsonValue::String("2020-01-03".to_owned()))
);
assert_eq!(
Value::Timestamp(NaiveDate::from_ymd(2022, 6, 11).and_hms(13, 30, 1)).try_into(),
Ok(JsonValue::String("2022-06-11 13:30:01 UTC".to_owned()))
);
assert_eq!(
Value::Time(NaiveTime::from_hms(20, 11, 59)).try_into(),
Ok(JsonValue::String("20:11:59".to_owned()))
);
assert_eq!(
Value::Interval(Interval::Month(17)).try_into(),
Ok(JsonValue::String("'1-5' YEAR TO MONTH".to_owned()))
);
let uuid = "43185717-59af-4e2b-9cd3-3264bf3691a4";
assert_eq!(
Value::Uuid(parse_uuid(uuid).unwrap()).try_into(),
Ok(JsonValue::String(uuid.to_owned()))
);
assert_eq!(
Value::parse_json_map(r#"{ "a": 10, "b": { "c": true, "d": "hello" }}"#)
.unwrap()
.try_into(),
Ok(json!({
"a": 10,
"b": {
"c": true,
"d": "hello",
}
}))
);
assert_eq!(
Value::parse_json_list(r#"[1, 2, { "a": 3 }]"#)
.unwrap()
.try_into(),
Ok(json!([1, 2, { "a": 3 }]))
);
assert_eq!(Value::Null.try_into(), Ok(JsonValue::Null));
}
#[test]
fn json_to_value() {
assert!(Value::try_from(JsonValue::Null).unwrap().is_null());
assert_eq!(JsonValue::Bool(false).try_into(), Ok(Value::Bool(false)));
assert_eq!(
JsonValue::Number(54321.into()).try_into(),
Ok(Value::I32(54321))
);
assert_eq!(
JsonValue::Number(54321.into()).try_into(),
Ok(Value::I64(54321))
);
assert_eq!(
JsonValue::Number(54321.into()).try_into(),
Ok(Value::I128(54321))
);
assert_eq!(
JsonValue::Number(JsonNumber::from_f64(3.21).unwrap()).try_into(),
Ok(Value::F64(3.21))
);
assert_eq!(
JsonValue::String("world".to_owned()).try_into(),
Ok(Value::Str("world".to_owned()))
);
assert_eq!(
JsonValue::Array(vec![JsonValue::Bool(true)]).try_into(),
Ok(Value::List(vec![Value::Bool(true)]))
);
assert_eq!(
json!({ "a": true }).try_into(),
Ok(Value::Map(
[("a".to_owned(), Value::Bool(true))].into_iter().collect()
))
);
}
}