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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// 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/indexed_db_index_writer.h"
#include "base/logging.h"
#include "base/strings/utf_string_conversions.h"
#include "content/browser/indexed_db/indexed_db_backing_store.h"
#include "content/browser/indexed_db/indexed_db_tracing.h"
#include "content/browser/indexed_db/indexed_db_transaction.h"
#include "content/common/indexed_db/indexed_db_key.h"
#include "content/common/indexed_db/indexed_db_key_path.h"
#include "content/common/indexed_db/indexed_db_key_range.h"
using base::ASCIIToUTF16;
namespace content {
IndexWriter::IndexWriter(
const IndexedDBIndexMetadata& index_metadata)
: index_metadata_(index_metadata) {}
IndexWriter::IndexWriter(
const IndexedDBIndexMetadata& index_metadata,
const IndexedDBDatabase::IndexKeys& index_keys)
: index_metadata_(index_metadata), index_keys_(index_keys) {}
IndexWriter::~IndexWriter() {}
bool IndexWriter::VerifyIndexKeys(
IndexedDBBackingStore* backing_store,
IndexedDBBackingStore::Transaction* transaction,
int64 database_id,
int64 object_store_id,
int64 index_id,
bool* can_add_keys,
const IndexedDBKey& primary_key,
base::string16* error_message) const {
*can_add_keys = false;
DCHECK_EQ(index_id, index_keys_.first);
for (size_t i = 0; i < index_keys_.second.size(); ++i) {
bool ok = AddingKeyAllowed(backing_store,
transaction,
database_id,
object_store_id,
index_id,
(index_keys_.second)[i],
primary_key,
can_add_keys);
if (!ok)
return false;
if (!*can_add_keys) {
if (error_message) {
*error_message = ASCIIToUTF16("Unable to add key to index '") +
index_metadata_.name +
ASCIIToUTF16("': at least one key does not satisfy "
"the uniqueness requirements.");
}
return true;
}
}
*can_add_keys = true;
return true;
}
void IndexWriter::WriteIndexKeys(
const IndexedDBBackingStore::RecordIdentifier& record_identifier,
IndexedDBBackingStore* backing_store,
IndexedDBBackingStore::Transaction* transaction,
int64 database_id,
int64 object_store_id) const {
int64 index_id = index_metadata_.id;
DCHECK_EQ(index_id, index_keys_.first);
for (size_t i = 0; i < index_keys_.second.size(); ++i) {
leveldb::Status s =
backing_store->PutIndexDataForRecord(transaction,
database_id,
object_store_id,
index_id,
index_keys_.second[i],
record_identifier);
// This should have already been verified as a valid write during
// verify_index_keys.
DCHECK(s.ok());
}
}
bool IndexWriter::AddingKeyAllowed(
IndexedDBBackingStore* backing_store,
IndexedDBBackingStore::Transaction* transaction,
int64 database_id,
int64 object_store_id,
int64 index_id,
const IndexedDBKey& index_key,
const IndexedDBKey& primary_key,
bool* allowed) const {
*allowed = false;
if (!index_metadata_.unique) {
*allowed = true;
return true;
}
scoped_ptr<IndexedDBKey> found_primary_key;
bool found = false;
leveldb::Status s = backing_store->KeyExistsInIndex(transaction,
database_id,
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(
IndexedDBTransaction* transaction,
IndexedDBBackingStore* backing_store,
int64 database_id,
const IndexedDBObjectStoreMetadata& object_store,
const IndexedDBKey& primary_key, // makes a copy
bool key_was_generated,
const std::vector<IndexedDBDatabase::IndexKeys>& index_keys,
ScopedVector<IndexWriter>* index_writers,
base::string16* error_message,
bool* completed) {
*completed = false;
for (const auto& it : index_keys) {
IndexedDBObjectStoreMetadata::IndexMap::const_iterator found =
object_store.indexes.find(it.first);
if (found == object_store.indexes.end())
continue;
const IndexedDBIndexMetadata& index = found->second;
IndexedDBDatabase::IndexKeys keys = it;
// If the object_store is using auto_increment, then any indexes with an
// identical key_path need to also use the primary (generated) key as a key.
if (key_was_generated && (index.key_path == object_store.key_path))
keys.second.push_back(primary_key);
scoped_ptr<IndexWriter> index_writer(new IndexWriter(index, keys));
bool can_add_keys = false;
bool backing_store_success =
index_writer->VerifyIndexKeys(backing_store,
transaction->BackingStoreTransaction(),
database_id,
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(index_writer.release());
}
*completed = true;
return true;
}
} // namespace content
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