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use std::sync::mpsc::Sender;
pub use versatile_data::search::{Field, Number, Term};
use versatile_data::{
Activity, Condition as VersatileDataCondition, RowSet, Search as VersatileDataSearch,
};
use crate::{Collection, Database, Depend, RelationIndex};
#[derive(Clone)]
pub enum Condition {
Activity(Activity),
Term(Term),
Row(Number),
Uuid(u128),
LastUpdated(Number),
Field(String, Field),
Narrow(Vec<Condition>),
Wide(Vec<Condition>),
Depend(Depend),
}
pub struct Search {
collection_id: i32,
conditions: Vec<Condition>,
}
impl Search {
pub fn new(collection: &Collection) -> Self {
Self {
collection_id: collection.id(),
conditions: Vec::new(),
}
}
pub fn search(mut self, condition: Condition) -> Self {
self.conditions.push(condition);
self
}
pub fn default(mut self) -> Self {
self.conditions
.push(Condition::Term(Term::In(chrono::Local::now().timestamp())));
self.conditions.push(Condition::Activity(Activity::Active));
self
}
pub fn depend(mut self, condition: Depend) -> Self {
self.conditions.push(Condition::Depend(condition));
self
}
pub fn field(self, field_name: impl Into<String>, condition: Field) -> Self {
self.search(Condition::Field(field_name.into(), condition))
}
fn exec_cond(
collection: &Collection,
relation: &RelationIndex,
condtion: &Condition,
tx: Sender<RowSet>,
) {
match condtion {
Condition::Activity(c) => {
VersatileDataSearch::search_exec_cond(
&collection.data,
&VersatileDataCondition::Activity(*c),
tx,
);
}
Condition::Term(c) => {
VersatileDataSearch::search_exec_cond(
&collection.data,
&VersatileDataCondition::Term(c.clone()),
tx,
);
}
Condition::Row(c) => {
VersatileDataSearch::search_exec_cond(
&collection.data,
&VersatileDataCondition::Row(c.clone()),
tx,
);
}
Condition::Uuid(c) => {
VersatileDataSearch::search_exec_cond(
&collection.data,
&VersatileDataCondition::Uuid(c.clone()),
tx,
);
}
Condition::LastUpdated(c) => {
VersatileDataSearch::search_exec_cond(
&collection.data,
&VersatileDataCondition::LastUpdated(c.clone()),
tx,
);
}
Condition::Field(key, condition) => {
VersatileDataSearch::search_exec_cond(
&collection.data,
&VersatileDataCondition::Field(key.to_owned(), condition.clone()),
tx,
);
}
Condition::Depend(depend) => {
let rel = relation.pends(depend.key(), depend.collection_row());
let collection_id = collection.id();
std::thread::spawn(move || {
let mut tmp = RowSet::default();
for r in rel {
if r.collection_id() == collection_id {
tmp.insert(r.row());
}
}
let tx = tx.clone();
tx.send(tmp).unwrap();
});
}
Condition::Narrow(conditions) => {
let (tx_inner, rx) = std::sync::mpsc::channel();
for c in conditions {
let tx_inner = tx_inner.clone();
Self::exec_cond(collection, relation, c, tx_inner);
}
drop(tx_inner);
std::thread::spawn(move || {
let mut is_1st = true;
let mut tmp = RowSet::default();
for mut rs in rx {
if is_1st {
tmp = rs;
is_1st = false;
} else {
tmp = tmp.intersection(&mut rs).map(|&x| x).collect();
}
}
tx.send(tmp).unwrap();
});
}
Condition::Wide(conditions) => {
let (tx_inner, rx) = std::sync::mpsc::channel();
for c in conditions {
let tx_inner = tx_inner.clone();
Self::exec_cond(collection, relation, c, tx_inner);
}
drop(tx_inner);
std::thread::spawn(move || {
let mut tmp = RowSet::default();
for ref mut rs in rx {
tmp.append(rs);
}
tx.send(tmp).unwrap();
});
}
}
}
pub(super) fn result(&self, database: &Database) -> RowSet {
let mut rows = RowSet::default();
if let Some(collection) = database.collection(self.collection_id) {
if self.conditions.len() > 0 {
let (tx, rx) = std::sync::mpsc::channel();
for c in &self.conditions {
Self::exec_cond(collection, &database.relation, c, tx.clone());
}
drop(tx);
let mut fst = true;
for rs in rx {
if fst {
rows = rs;
fst = false;
} else {
rows = rows.intersection(&rs).map(|&x| x).collect()
}
}
} else {
for row in collection.data.all() {
rows.insert(row);
}
}
}
rows
}
}