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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/indexed_db/instance/index_writer.h"
#include <stddef.h>
#include <cstdint>
#include <memory>
#include <string>
#include <utility>
#include <vector>
#include "base/strings/utf_string_conversions.h"
#include "content/browser/indexed_db/instance/transaction.h"
#include "content/browser/indexed_db/status.h"
#include "third_party/blink/public/common/indexeddb/indexeddb_metadata.h"
#include "third_party/blink/public/mojom/indexeddb/indexeddb.mojom.h"
using blink::IndexedDBIndexKeys;
using blink::IndexedDBIndexMetadata;
using blink::IndexedDBKey;
using blink::IndexedDBObjectStoreMetadata;
namespace content::indexed_db {
IndexWriter::IndexWriter(const IndexedDBIndexMetadata& index_metadata)
: index_metadata_(index_metadata) {}
IndexWriter::IndexWriter(const IndexedDBIndexMetadata& index_metadata,
std::vector<IndexedDBKey> keys)
: index_metadata_(index_metadata), keys_(std::move(keys)) {}
IndexWriter::~IndexWriter() {}
bool IndexWriter::VerifyIndexKeys(BackingStore::Transaction* transaction,
int64_t object_store_id,
int64_t index_id,
bool* can_add_keys,
const IndexedDBKey& primary_key,
std::string* error_message) const {
*can_add_keys = false;
for (const auto& key : keys_) {
bool ok = AddingKeyAllowed(transaction, object_store_id, index_id, key,
primary_key, can_add_keys);
if (!ok) {
return false;
}
if (!*can_add_keys) {
if (error_message) {
*error_message = "Unable to add key to index '" +
base::UTF16ToUTF8(index_metadata_.name) +
"': at least one key does not satisfy the uniqueness "
"requirements.";
}
return true;
}
}
*can_add_keys = true;
return true;
}
Status IndexWriter::WriteIndexKeys(
const BackingStore::RecordIdentifier& record_identifier,
BackingStore::Transaction* transaction,
int64_t object_store_id) const {
int64_t index_id = index_metadata_.id;
for (const auto& key : keys_) {
Status s = transaction->PutIndexDataForRecord(object_store_id, index_id,
key, record_identifier);
if (!s.ok()) {
return s;
}
}
return Status::OK();
}
bool IndexWriter::AddingKeyAllowed(BackingStore::Transaction* transaction,
int64_t object_store_id,
int64_t index_id,
const IndexedDBKey& index_key,
const IndexedDBKey& primary_key,
bool* allowed) const {
*allowed = false;
if (!index_metadata_.unique) {
*allowed = true;
return true;
}
std::unique_ptr<IndexedDBKey> found_primary_key;
bool found = false;
Status s = transaction->KeyExistsInIndex(object_store_id, index_id, index_key,
&found_primary_key, &found);
if (!s.ok()) {
return false;
}
if (!found ||
(primary_key.IsValid() && found_primary_key->Equals(primary_key))) {
*allowed = true;
}
return true;
}
bool MakeIndexWriters(Transaction* transaction,
const IndexedDBObjectStoreMetadata& object_store,
const IndexedDBKey& primary_key,
bool key_was_generated,
std::vector<IndexedDBIndexKeys> index_keys,
std::vector<std::unique_ptr<IndexWriter>>* index_writers,
std::string* error_message,
bool* completed) {
*completed = false;
for (IndexedDBIndexKeys& it : index_keys) {
auto found = object_store.indexes.find(it.id);
if (found == object_store.indexes.end()) {
continue;
}
const IndexedDBIndexMetadata& index = found->second;
// A copy is made because additional keys may be added.
std::vector<IndexedDBKey> keys = std::move(it.keys);
// If the object_store is using a key generator to produce the primary key,
// and the store uses in-line keys, index key paths may reference it.
if (key_was_generated && !object_store.key_path.IsNull()) {
if (index.key_path == object_store.key_path) {
// The index key path is the same as the store's key path - no index key
// will have been sent by the front end, so synthesize one here.
keys.emplace_back(primary_key.Clone());
} else if (index.key_path.type() == blink::mojom::IDBKeyPathType::Array) {
// An index with compound keys for a store with a key generator and
// in-line keys may need subkeys filled in. These are represented as
// "holes", which are not otherwise allowed.
for (size_t i = 0; i < keys.size(); ++i) {
if (keys[i].HasHoles()) {
keys[i] = keys[i].FillHoles(primary_key);
}
}
}
}
std::unique_ptr<IndexWriter> index_writer(
std::make_unique<IndexWriter>(index, std::move(keys)));
bool can_add_keys = false;
bool backing_store_success = index_writer->VerifyIndexKeys(
transaction->BackingStoreTransaction(), object_store.id, index.id,
&can_add_keys, primary_key, error_message);
if (!backing_store_success) {
return false;
}
if (!can_add_keys) {
return true;
}
index_writers->push_back(std::move(index_writer));
}
*completed = true;
return true;
}
} // namespace content::indexed_db
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