int SLNSessionGetFileInfo(SLNSessionRef const session, strarg_t const URI, SLNFileInfo *const info) {
DB_env *db = NULL;
int rc = SLNSessionDBOpen(session, SLN_RDONLY, &db);
if(rc < 0) return rc;
DB_txn *txn = NULL;
rc = db_txn_begin(db, NULL, DB_RDONLY, &txn);
if(rc < 0) {
SLNSessionDBClose(session, &db);
return rc;
}
DB_cursor *cursor;
rc = db_txn_cursor(txn, &cursor);
assert(!rc);
DB_range fileIDs[1];
SLNURIAndFileIDRange1(fileIDs, txn, URI);
DB_val URIAndFileID_key[1];
rc = db_cursor_firstr(cursor, fileIDs, URIAndFileID_key, NULL, +1);
DB_val file_val[1];
if(rc >= 0) {
strarg_t URI2;
uint64_t fileID;
SLNURIAndFileIDKeyUnpack(URIAndFileID_key, txn, &URI2, &fileID);
assert(0 == strcmp(URI, URI2));
if(info) {
DB_val fileID_key[1];
SLNFileByIDKeyPack(fileID_key, txn, fileID);
rc = db_get(txn, fileID_key, file_val);
}
}
if(rc < 0) {
db_txn_abort(txn); txn = NULL;
SLNSessionDBClose(session, &db);
return rc;
}
if(info) {
// Clear padding for later assert_zeroed.
memset(info, 0, sizeof(*info));
strarg_t const internalHash = db_read_string(file_val, txn);
strarg_t const type = db_read_string(file_val, txn);
uint64_t const size = db_read_uint64(file_val);
info->hash = strdup(internalHash);
info->path = SLNRepoCopyInternalPath(SLNSessionGetRepo(session), internalHash);
info->type = strdup(type);
info->size = size;
if(!info->hash || !info->path || !info->type) {
SLNFileInfoCleanup(info);
db_txn_abort(txn); txn = NULL;
SLNSessionDBClose(session, &db);
return DB_ENOMEM;
}
}
db_txn_abort(txn); txn = NULL;
SLNSessionDBClose(session, &db);
return 0;
}
int SLNSessionCopyLastSubmissionURIs(SLNSessionRef const session, str_t *const outFileURI, str_t *const outMetaURI) {
DB_env *db = NULL;
DB_txn *txn = NULL;
int rc = SLNSessionDBOpen(session, SLN_RDWR, &db);
if(rc < 0) goto cleanup;
rc = db_txn_begin(db, NULL, DB_RDONLY, &txn);
if(rc < 0) goto cleanup;
if(outFileURI) {
DB_val key[1], val[1];
DB_VAL_STORAGE(key, DB_VARINT_MAX*2);
db_bind_uint64(key, SLNLastFileURIBySessionID);
db_bind_uint64(key, session->sessionID);
DB_VAL_STORAGE_VERIFY(key);
rc = db_get(txn, key, val);
if(rc >= 0) {
strarg_t const URI = db_read_string(val, txn);
strlcpy(outFileURI, URI, SLN_URI_MAX);
} else if(DB_NOTFOUND == rc) {
outFileURI[0] = '\0';
rc = 0;
} else {
goto cleanup;
}
}
if(outMetaURI) {
DB_val key[1], val[1];
DB_VAL_STORAGE(key, DB_VARINT_MAX*2);
db_bind_uint64(key, SLNLastMetaURIBySessionID);
db_bind_uint64(key, session->sessionID);
DB_VAL_STORAGE_VERIFY(key);
rc = db_get(txn, key, val);
if(rc >= 0) {
strarg_t const URI = db_read_string(val, txn);
strlcpy(outMetaURI, URI, SLN_URI_MAX);
} else if(DB_NOTFOUND == rc) {
outMetaURI[0] = '\0';
rc = 0;
} else {
goto cleanup;
}
}
cleanup:
db_txn_abort(txn); txn = NULL;
SLNSessionDBClose(session, &db);
return rc;
}
int SLNFilterCopyURI(SLNFilterRef const filter, uint64_t const fileID, bool const meta, DB_txn *const txn, str_t **const out) {
DB_val fileID_key[1], file_val[1];
SLNFileByIDKeyPack(fileID_key, txn, fileID);
int rc = db_get(txn, fileID_key, file_val);
if(rc < 0) return rc;
strarg_t const hash = db_read_string(file_val, txn);
db_assert(hash);
str_t *URI = NULL;
if(!meta) {
URI = SLNFormatURI(SLN_INTERNAL_ALGO, hash);
if(!URI) return DB_ENOMEM;
} else {
DB_val key[1], val[1];
SLNMetaFileByIDKeyPack(key, txn, fileID);
rc = db_get(txn, key, val);
if(rc < 0) return rc;
uint64_t f;
strarg_t target = NULL;
SLNMetaFileByIDValUnpack(val, txn, &f, &target);
db_assert(target);
URI = aasprintf("hash://%s/%s -> %s", SLN_INTERNAL_ALGO, hash, target);
if(!URI) return DB_ENOMEM;
}
*out = URI; URI = NULL;
return 0;
}
