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use std::{
num::{NonZeroI32, NonZeroU32},
ops::Deref,
};
use semilattice_database::{Activity, Term};
use hashbrown::HashMap;
use crate::{
session::{SessionData, SessionOperation},
CollectionRow, Session, SessionDatabase,
};
impl SessionDatabase {
pub async fn commit(&mut self, session: &mut Session) -> Vec<CollectionRow> {
if let Some(ref mut data) = session.session_data {
let r = self.commit_inner(data).await;
self.session_clear(session);
r
} else {
vec![]
}
}
async fn commit_inner(&mut self, session_data: &SessionData) -> Vec<CollectionRow> {
let mut commit_rows = Vec::new();
let mut session_collection_row_map: HashMap<CollectionRow, CollectionRow> = HashMap::new();
let mut relation_temporary: HashMap<CollectionRow, Vec<(String, CollectionRow)>> =
HashMap::new();
for sequence in 1..=session_data.sequence_number.current() {
for session_row in session_data
.sequence
.iter_by(|v| v.cmp(&sequence))
.collect::<Vec<_>>()
.into_iter()
.rev()
{
if let (Some(op), Some(collection_id), Some(row)) = (
session_data.operation.get(session_row),
session_data.collection_id.get(session_row),
session_data.row.get(session_row),
) {
let in_session = *collection_id.deref() < 0;
let main_collection_id = NonZeroI32::new(if in_session {
-*collection_id.deref()
} else {
*collection_id.deref()
})
.unwrap();
if let Some(collection) = self.collection_mut(main_collection_id) {
let row = if *row.deref() == 0 {
session_row
} else {
unsafe { NonZeroU32::new_unchecked(*row.deref()) }
};
let fields = if *op.deref() == SessionOperation::Delete {
HashMap::new()
} else {
session_data
.fields
.iter()
.filter_map(|(field_name, field_data)| {
field_data
.bytes(session_row)
.map(|val| (field_name.clone(), val.to_owned()))
})
.collect()
};
let session_collection_row = CollectionRow::new(
NonZeroI32::new(*collection_id.deref()).unwrap(),
row,
);
match op.deref() {
SessionOperation::New | SessionOperation::Update => {
let activity = if *session_data
.activity
.get(session_row)
.unwrap()
.deref()
== 1
{
Activity::Active
} else {
Activity::Inactive
};
let term_begin = Term::Overwrite(
*session_data.term_begin.get(session_row).unwrap().deref(),
);
let term_end = Term::Overwrite(
*session_data.term_end.get(session_row).unwrap().deref(),
);
let collection_row = CollectionRow::new(
main_collection_id,
if *op.deref() == SessionOperation::New {
collection
.insert(activity, term_begin, term_end, fields)
.await
} else {
let row = if in_session {
let main_collection_row = session_collection_row_map
.get(&session_collection_row)
.unwrap();
main_collection_row.row()
} else {
row
};
collection
.update(row, activity, term_begin, term_end, fields)
.await;
row
},
);
commit_rows.push(collection_row.clone());
self.relation_mut()
.delete_pends_by_collection_row(&collection_row)
.await; //Delete once and re-register later
for relation_row in session_data
.relation
.rows
.session_row
.iter_by(|v| v.cmp(&session_row.get()))
{
if let (Some(key), Some(depend)) = (
session_data.relation.rows.key.get(relation_row),
session_data.relation.rows.depend.get(relation_row),
) {
relation_temporary
.entry(depend.deref().clone())
.or_insert_with(|| Vec::new())
.push((
unsafe {
std::str::from_utf8_unchecked(
session_data
.relation
.key_names
.bytes(
NonZeroU32::new(*key.deref())
.unwrap(),
)
.unwrap(),
)
}
.to_owned(),
session_collection_row.clone(),
));
}
}
session_collection_row_map
.insert(session_collection_row, collection_row);
}
SessionOperation::Delete => {
if in_session {
if let Some(registered) =
session_collection_row_map.get(&session_collection_row)
{
self.delete(registered).await;
}
} else {
self.delete(&CollectionRow::new(
main_collection_id,
row,
))
.await;
}
session_collection_row_map.remove(&session_collection_row);
}
}
}
}
}
}
for (depend, pends) in relation_temporary.into_iter() {
if depend.collection_id().get() < 0 {
if let Some(depend) = session_collection_row_map.get(&depend) {
self.register_relations_with_session(
depend,
pends,
&session_collection_row_map,
)
.await;
}
} else {
self.register_relations_with_session(&depend, pends, &session_collection_row_map)
.await;
}
}
commit_rows
}
}