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ndb: switch to case-insensitive profile searches

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This commit is contained in:
William Casarin 2023-09-21 18:03:22 -04:00
parent 7a85ae29ca
commit 6f67c159ff
1 changed files with 46 additions and 3 deletions
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49
nostrdb/nostrdb.c
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@ -124,12 +124,33 @@ struct ndb_tsid {
uint64_t timestamp;
};
// Copies only lowercase characters to the destination string and fills the rest with null bytes.
// `dst` and `src` are pointers to the destination and source strings, respectively.
// `n` is the maximum number of characters to copy.
static void lowercase_strncpy(char *dst, const char *src, int n) {
int j = 0, i = 0;
if (!dst || !src || n == 0) {
return;
}
while (src[i] != '\0' && j < n) {
dst[j++] = tolower(src[i++]);
}
// Null-terminate and fill the destination string
while (j < n) {
dst[j++] = '\0';
}
}
static void ndb_make_search_key(struct ndb_search_key *key, unsigned char *id,
uint64_t timestamp, const char *search)
{
memcpy(key->id, id, 32);
key->timestamp = timestamp;
strncpy(key->search, search, sizeof(key->search) - 1);
lowercase_strncpy(key->search, search, sizeof(key->search) - 1);
key->search[sizeof(key->search) - 1] = '\0';
}
@ -265,8 +286,29 @@ static int ndb_migrate_user_search_indices(struct ndb *ndb)
return 1;
}
static int ndb_migrate_lower_user_search_indices(struct ndb *ndb)
{
MDB_txn *txn;
if (mdb_txn_begin(ndb->lmdb.env, NULL, 0, &txn)) {
fprintf(stderr, "ndb_migrate_lower_user_search_indices: ndb_txn_begin failed\n");
return 0;
}
// just drop the search db so we can rebuild it
if (mdb_drop(txn, ndb->lmdb.dbs[NDB_DB_PROFILE_SEARCH], 0)) {
fprintf(stderr, "ndb_migrate_lower_user_search_indices: mdb_drop failed\n");
return 0;
}
mdb_txn_commit(txn);
return ndb_migrate_user_search_indices(ndb);
}
static struct ndb_migration MIGRATIONS[] = {
{ .fn = ndb_migrate_user_search_indices }
{ .fn = ndb_migrate_user_search_indices },
{ .fn = ndb_migrate_lower_user_search_indices }
};
@ -802,12 +844,13 @@ static uint64_t ndb_get_last_key(MDB_txn *txn, MDB_dbi db)
return *((uint64_t*)key.mv_data);
}
//
// make a search key meant for user queries without any other note info
static void ndb_make_search_key_low(struct ndb_search_key *key, const char *search)
{
memset(key->id, 0, sizeof(key->id));
key->timestamp = 0;
strncpy(key->search, search, sizeof(key->search) - 1);
lowercase_strncpy(key->search, search, sizeof(key->search) - 1);
key->search[sizeof(key->search) - 1] = '\0';
}