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use idx_sized::IdSet;
use crate::ConditionField;
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 enum SearchCondition{
Activity(ConditionActivity)
,Term(ConditionTerm)
,Field(String,ConditionField)
}
#[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
}
pub fn search(mut self,condition: SearchCondition)->Self{
if self.result.len()>0{
let search=self.data.search(condition);
self.reduce(search.result);
}
self
}
pub fn reduce_default(mut self)->Self{
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();
for i in newset.intersection(&self.result){
ret.insert(*i);
}
self.result=ret;
}
}