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use idx_sized::IdSet;
use crate::SearchCondition;
use crate::Data;
#[derive(Clone,Copy,PartialEq)]
pub enum ConditionActivity{
Active
,Inactive
}
#[derive(Clone,Copy,PartialEq)]
pub enum ConditionTerm{
In(i64)
,Past(i64)
,Future(i64)
}
#[derive(Clone)]
pub struct Reducer<'a>{
data:&'a Data
,result:IdSet
}
impl<'a> Reducer<'a>{
pub fn new(data:&'a Data,result:IdSet)->Reducer{
Reducer{
data
,result
}
}
pub fn get(&self)->IdSet{
self.result.clone()
}
pub fn search_activity(&'a mut self,condition: ConditionActivity)->&'a mut Reducer{
if self.result.len()>0{
let search=self.data.search_activity(condition);
self.reduce(search.result);
}
self
}
pub fn search_field(&'a mut self,field_name:&str,condition: SearchCondition)->&'a mut Reducer{
if self.result.len()>0{
let search=self.data.search_field(field_name,condition);
self.reduce(search.result);
}
self
}
pub fn search_term(&'a mut self,condition:ConditionTerm)->&'a mut Reducer{
if self.result.len()>0{
let search=self.data.search_term(condition);
self.reduce(search.result);
}
self
}
pub fn reduce_default(&'a mut self)->&'a mut Reducer{
if self.result.len()>0{
self.reduce(
self.data.search_term(ConditionTerm::In(chrono::Local::now().timestamp())).result
);
self.reduce(
self.data.search_activity(ConditionActivity::Active).result
);
}
self
}
fn reduce(&mut self,newset:IdSet){
let mut ret=IdSet::default();
if newset.len()<self.result.len(){
for i in newset{
if self.result.contains(&i){
ret.insert(i);
}
}
}else{
for i in &self.result{
if newset.contains(&i){
ret.insert(*i);
}
}
}
self.result=ret;
}
}