Add name, created_at and updated_at informations into main index

meilidb-core/src/store/main.rs

@@ -1,17 +1,22 @@
+use chrono::{DateTime, Utc};
 use crate::RankedMap;
-use heed::types::{ByteSlice, OwnedType, SerdeBincode, Str};
 use heed::Result as ZResult;
+use heed::types::{ByteSlice, OwnedType, SerdeBincode, Str};
 use meilidb_schema::Schema;
 use std::sync::Arc;
 
+const CREATED_AT: &str = "created-at";
 const CUSTOMS_KEY: &str = "customs-key";
+const NAME: &str = "name";
 const NUMBER_OF_DOCUMENTS_KEY: &str = "number-of-documents";
 const RANKED_MAP_KEY: &str = "ranked-map";
 const SCHEMA_KEY: &str = "schema";
-const SYNONYMS_KEY: &str = "synonyms";
 const STOP_WORDS_KEY: &str = "stop-words";
+const SYNONYMS_KEY: &str = "synonyms";
 const WORDS_KEY: &str = "words";
 
+type SerdeDatetime = SerdeBincode<DateTime<Utc>>;
+
 #[derive(Copy, Clone)]
 pub struct Main {
     pub(crate) main: heed::PolyDatabase,
@@ -22,6 +27,22 @@ impl Main {
         self.main.clear(writer)
     }
 
+    pub fn name(self, reader: &heed::RoTxn) -> ZResult<Option<String>> {
+        Ok(self.main.get::<Str, Str>(reader, NAME)?.map(|name| name.to_owned()))
+    }
+
+    pub fn put_name(self, writer: &mut heed::RwTxn, name: &str) -> ZResult<()> {
+        self.main.put::<Str, Str>(writer, NAME, name)
+    }
+
+    pub fn created_at(self, reader: &heed::RoTxn) -> ZResult<Option<DateTime<Utc>>> {
+        self.main.get::<Str, SerdeDatetime>(reader, CREATED_AT)
+    }
+
+    pub fn put_created_at(self, writer: &mut heed::RwTxn) -> ZResult<()> {
+        self.main.put::<Str, SerdeDatetime>(writer, CREATED_AT, &Utc::now())
+    }
+
     pub fn put_words_fst(self, writer: &mut heed::RwTxn, fst: &fst::Set) -> ZResult<()> {
         let bytes = fst.as_fst().as_bytes();
         self.main.put::<Str, ByteSlice>(writer, WORDS_KEY, bytes)