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|
use serde_json::{Number, Value};
use select::cmp::*;
use select::{FilterKey, to_f64};
#[derive(Debug, PartialEq)]
pub(super) enum ExprTerm<'a> {
String(String),
Number(Number),
Bool(bool),
Json(Option<Vec<&'a Value>>, Option<FilterKey>, Vec<&'a Value>),
}
impl<'a> ExprTerm<'a> {
fn cmp<C1: Cmp, C2: Cmp>(
&self,
other: &Self,
cmp_fn: &C1,
reverse_cmp_fn: &C2,
) -> ExprTerm<'a> {
match &self {
ExprTerm::String(s1) => match &other {
ExprTerm::String(s2) => ExprTerm::Bool(cmp_fn.cmp_string(s1, s2)),
ExprTerm::Json(_, _, _) => other.cmp(&self, reverse_cmp_fn, cmp_fn),
_ => ExprTerm::Bool(cmp_fn.default()),
},
ExprTerm::Number(n1) => match &other {
ExprTerm::Number(n2) => ExprTerm::Bool(cmp_fn.cmp_f64(to_f64(n1), to_f64(n2))),
ExprTerm::Json(_, _, _) => other.cmp(&self, reverse_cmp_fn, cmp_fn),
_ => ExprTerm::Bool(cmp_fn.default()),
},
ExprTerm::Bool(b1) => match &other {
ExprTerm::Bool(b2) => ExprTerm::Bool(cmp_fn.cmp_bool(*b1, *b2)),
ExprTerm::Json(_, _, _) => other.cmp(&self, reverse_cmp_fn, cmp_fn),
_ => ExprTerm::Bool(cmp_fn.default()),
},
ExprTerm::Json(rel, fk1, vec1) => {
let ret: Vec<&Value> = match &other {
ExprTerm::String(s2) => vec1
.iter()
.filter(|v1| match v1 {
Value::String(s1) => cmp_fn.cmp_string(s1, s2),
Value::Object(map1) => {
if let Some(FilterKey::String(k)) = fk1 {
if let Some(Value::String(s1)) = map1.get(k) {
return cmp_fn.cmp_string(s1, s2);
}
}
cmp_fn.default()
}
_ => cmp_fn.default(),
})
.cloned()
.collect(),
ExprTerm::Number(n2) => vec1
.iter()
.filter(|v1| match v1 {
Value::Number(n1) => cmp_fn.cmp_f64(to_f64(n1), to_f64(n2)),
Value::Object(map1) => {
if let Some(FilterKey::String(k)) = fk1 {
if let Some(Value::Number(n1)) = map1.get(k) {
return cmp_fn.cmp_f64(to_f64(n1), to_f64(n2));
}
}
cmp_fn.default()
}
_ => cmp_fn.default(),
})
.cloned()
.collect(),
ExprTerm::Bool(b2) => vec1
.iter()
.filter(|v1| match v1 {
Value::Bool(b1) => cmp_fn.cmp_bool(*b1, *b2),
Value::Object(map1) => {
if let Some(FilterKey::String(k)) = fk1 {
if let Some(Value::Bool(b1)) = map1.get(k) {
return cmp_fn.cmp_bool(*b1, *b2);
}
}
cmp_fn.default()
}
_ => cmp_fn.default(),
})
.cloned()
.collect(),
ExprTerm::Json(parent, _, vec2) => {
if let Some(vec1) = rel {
cmp_fn.cmp_json(vec1, vec2)
} else if let Some(vec2) = parent {
cmp_fn.cmp_json(vec1, vec2)
} else {
cmp_fn.cmp_json(vec1, vec2)
}
}
};
if ret.is_empty() {
ExprTerm::Bool(cmp_fn.default())
} else if let Some(rel) = rel {
if let ExprTerm::Json(_, _, _) = &other {
ExprTerm::Json(Some(rel.to_vec()), None, ret)
} else {
let mut tmp = Vec::new();
for rel_value in rel {
if let Value::Object(map) = rel_value {
for map_value in map.values() {
for result_value in &ret {
if map_value.eq(*result_value) {
tmp.push(*rel_value);
}
}
}
}
}
ExprTerm::Json(Some(tmp), None, ret)
}
} else {
ExprTerm::Json(None, None, ret)
}
}
}
}
pub fn eq(&self, other: &Self, ret: &mut Option<ExprTerm<'a>>) {
debug!("eq - {:?} : {:?}", &self, &other);
let _ = ret.take();
let tmp = self.cmp(other, &CmpEq, &CmpEq);
debug!("eq = {:?}", tmp);
*ret = Some(tmp);
}
pub fn ne(&self, other: &Self, ret: &mut Option<ExprTerm<'a>>) {
debug!("ne - {:?} : {:?}", &self, &other);
let _ = ret.take();
let tmp = self.cmp(other, &CmpNe, &CmpNe);
debug!("ne = {:?}", tmp);
*ret = Some(tmp);
}
pub fn gt(&self, other: &Self, ret: &mut Option<ExprTerm<'a>>) {
debug!("gt - {:?} : {:?}", &self, &other);
let _ = ret.take();
let tmp = self.cmp(other, &CmpGt, &CmpLt);
debug!("gt = {:?}", tmp);
*ret = Some(tmp);
}
pub fn ge(&self, other: &Self, ret: &mut Option<ExprTerm<'a>>) {
debug!("ge - {:?} : {:?}", &self, &other);
let _ = ret.take();
let tmp = self.cmp(other, &CmpGe, &CmpLe);
debug!("ge = {:?}", tmp);
*ret = Some(tmp);
}
pub fn lt(&self, other: &Self, ret: &mut Option<ExprTerm<'a>>) {
debug!("lt - {:?} : {:?}", &self, &other);
let _ = ret.take();
let tmp = self.cmp(other, &CmpLt, &CmpGt);
debug!("lt = {:?}", tmp);
*ret = Some(tmp);
}
pub fn le(&self, other: &Self, ret: &mut Option<ExprTerm<'a>>) {
debug!("le - {:?} : {:?}", &self, &other);
let _ = ret.take();
let tmp = self.cmp(other, &CmpLe, &CmpGe);
debug!("le = {:?}", tmp);
*ret = Some(tmp);
}
pub fn and(&self, other: &Self, ret: &mut Option<ExprTerm<'a>>) {
debug!("and - {:?} : {:?}", &self, &other);
let _ = ret.take();
let tmp = self.cmp(other, &CmpAnd, &CmpAnd);
debug!("and = {:?}", tmp);
*ret = Some(tmp);
}
pub fn or(&self, other: &Self, ret: &mut Option<ExprTerm<'a>>) {
debug!("or - {:?} : {:?}", &self, &other);
let _ = ret.take();
let tmp = self.cmp(other, &CmpOr, &CmpOr);
debug!("or = {:?}", tmp);
*ret = Some(tmp);
}
}
impl<'a> From<&Vec<&'a Value>> for ExprTerm<'a> {
fn from(vec: &Vec<&'a Value>) -> Self {
if vec.len() == 1 {
match &vec[0] {
Value::Number(v) => return ExprTerm::Number(v.clone()),
Value::String(v) => return ExprTerm::String(v.clone()),
Value::Bool(v) => return ExprTerm::Bool(*v),
_ => {}
}
}
ExprTerm::Json(None, None, vec.to_vec())
}
}
#[cfg(test)]
mod expr_term_inner_tests {
use serde_json::{Number, Value};
use select::expr_term::ExprTerm;
#[test]
fn value_vec_into() {
let v = Value::Bool(true);
let vec = &vec![&v];
let term: ExprTerm = vec.into();
assert_eq!(term, ExprTerm::Bool(true));
let v = Value::String("a".to_string());
let vec = &vec![&v];
let term: ExprTerm = vec.into();
assert_eq!(term, ExprTerm::String("a".to_string()));
let v = serde_json::from_str("1.0").unwrap();
let vec = &vec![&v];
let term: ExprTerm = vec.into();
assert_eq!(term, ExprTerm::Number(Number::from_f64(1.0).unwrap()));
}
}
|
