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use std::{
num::{NonZeroI64, NonZeroU32},
ops::Deref,
path::Path,
time::{SystemTime, UNIX_EPOCH},
};
use async_recursion::async_recursion;
use hashbrown::HashMap;
use crate::{
session::{Depends, SessionData, SessionOperation, TemporaryData, TemporaryDataEntity},
CollectionRow, Depend, SessionDatabase, SessionRecord, Term,
};
impl SessionDatabase {
#[async_recursion(?Send)]
pub(super) async fn update_recursive(
&self,
session_data: &mut SessionData,
temporary_data: &mut TemporaryData,
session_dir: &Path,
sequence_number: usize,
records: &Vec<SessionRecord>,
depend_by_pend: Option<(&'async_recursion str, NonZeroU32)>,
) -> Vec<CollectionRow> {
let mut ret = vec![];
for record in records.into_iter() {
let session_row = session_data.sequence.insert(sequence_number);
match record {
SessionRecord::Update {
collection_id, //Negative values contain session rows
row,
activity,
term_begin,
term_end,
fields,
depends,
pends,
} => {
if let Some(row) = row {
let collection_id = *collection_id;
ret.push(CollectionRow::new(collection_id, *row));
let in_session = collection_id.get() < 0;
let master_collection_id = if in_session {
-collection_id
} else {
collection_id
};
let term_begin = match *term_begin {
Term::Overwrite(term_begin) => term_begin,
Term::Default => (!in_session)
.then(|| {
self.collection(master_collection_id)
.map(|collection| collection.term_begin(*row).unwrap_or(0))
})
.and_then(|v| v)
.unwrap_or_else(|| {
SystemTime::now()
.duration_since(UNIX_EPOCH)
.unwrap()
.as_secs()
}),
};
let term_end = if let Term::Overwrite(term_end) = *term_end {
term_end
} else {
0
};
let temporary_collection = temporary_data
.entry(master_collection_id)
.or_insert(HashMap::new());
let uuid = {
if in_session {
session_data.uuid.get(*row).map_or_else(
|| semilattice_database::create_uuid(),
|uuid| *uuid.deref(),
)
} else {
if let Some(collection) = self.collection(master_collection_id) {
let uuid = collection.uuid(*row).unwrap_or(0);
if uuid == 0 {
semilattice_database::create_uuid()
} else {
uuid
}
} else {
unreachable!();
}
}
};
futures::join!(
async {
session_data
.collection_id
.update(session_row, collection_id.get())
},
async {
session_data
.operation
.update(session_row, SessionOperation::Update)
},
);
session_data
.update(
session_dir,
session_row,
row.get(),
activity,
term_begin,
term_end,
uuid,
fields,
)
.await;
let mut tmp_depends = vec![];
match depends {
Depends::Default => {
if in_session {
session_data
.relation
.from_session_row(*row, session_row)
.await;
} else {
for i in self.relation().index_pend().iter_by(|v| {
v.cmp(&CollectionRow::new(collection_id, *row))
}) {
if let Some(depend) = self.relation().depend(i) {
let key = self.relation().key(i).to_owned();
session_data
.relation
.insert(&key, session_row, depend.clone())
.await;
tmp_depends.push(Depend::new(key, depend.clone()));
}
}
}
}
Depends::Overwrite(depends) => {
for (key, depend) in depends.into_iter() {
session_data
.relation
.insert(key, session_row, depend.clone())
.await;
tmp_depends.push(Depend::new(key, depend.clone()));
}
}
}
temporary_collection
.entry(
NonZeroI64::new(if in_session {
-(row.get() as i64)
} else {
row.get() as i64
})
.unwrap(),
)
.or_insert(TemporaryDataEntity {
activity: *activity,
term_begin,
term_end,
uuid,
operation: SessionOperation::Update,
fields: fields
.iter()
.map(|(field_name, value)| (field_name.clone(), value.to_vec()))
.collect(),
depends: tmp_depends,
});
if let Some((key, depend_session_row)) = depend_by_pend {
session_data
.incidentally_depend(session_row, key, depend_session_row)
.await;
}
for pend in pends.into_iter() {
self.update_recursive(
session_data,
temporary_data,
session_dir,
sequence_number,
&pend.records,
Some((&pend.key, session_row)),
)
.await;
}
} else {
let session_collection_id = -*collection_id;
ret.push(CollectionRow::new(session_collection_id, session_row));
let term_begin = if let Term::Overwrite(term_begin) = *term_begin {
term_begin
} else {
SystemTime::now()
.duration_since(UNIX_EPOCH)
.unwrap()
.as_secs()
};
let term_end = if let Term::Overwrite(term_end) = *term_end {
term_end
} else {
0
};
let uuid = semilattice_database::create_uuid();
futures::join!(
async {
session_data
.collection_id
.update(session_row, session_collection_id.get())
},
async {
session_data
.operation
.update(session_row, SessionOperation::New)
},
);
session_data
.update(
session_dir,
session_row,
0,
activity,
term_begin,
term_end,
uuid,
fields,
)
.await;
let temprary_collection = temporary_data
.entry(-session_collection_id)
.or_insert(HashMap::new());
temprary_collection.insert(
(-(session_row.get() as i64)).try_into().unwrap(),
TemporaryDataEntity {
activity: *activity,
term_begin,
term_end,
uuid,
operation: SessionOperation::New,
fields: fields
.iter()
.map(|(field_name, value)| (field_name.clone(), value.to_vec()))
.collect(),
depends: if let Depends::Overwrite(depends) = depends {
let mut tmp = vec![];
for (key, depend) in depends.into_iter() {
session_data
.relation
.insert(key, session_row, depend.clone())
.await;
tmp.push(Depend::new(key, depend.clone()));
}
tmp
} else {
vec![]
},
},
);
if let Some((key, depend_session_row)) = depend_by_pend {
session_data
.incidentally_depend(session_row, key, depend_session_row)
.await;
}
for pend in pends.into_iter() {
self.update_recursive(
session_data,
temporary_data,
session_dir,
sequence_number,
&pend.records,
Some((&pend.key, session_row)),
)
.await;
}
}
}
SessionRecord::Delete { collection_id, row } => {
futures::join!(
async {
session_data
.collection_id
.update(session_row, collection_id.get())
},
async { session_data.row.update(session_row, row.get()) },
async {
session_data
.operation
.update(session_row, SessionOperation::Delete)
}
);
}
}
}
ret
}
}