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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/feed/core/v2/xsurface_datastore.h"
#include <iterator>
#include "base/logging.h"
#include "base/observer_list.h"
namespace feed {
XsurfaceDatastoreSlice::XsurfaceDatastoreSlice() = default;
XsurfaceDatastoreSlice::~XsurfaceDatastoreSlice() = default;
void XsurfaceDatastoreSlice::UpdateDatastoreEntry(const std::string& key,
const std::string& value) {
entries_[key] = value;
for (auto& o : observers_) {
o.DatastoreEntryUpdated(this, key);
}
}
void XsurfaceDatastoreSlice::RemoveDatastoreEntry(const std::string& key) {
if (!entries_.erase(key)) {
DLOG(WARNING) << "RemoveDatastoreEntry(" << key
<< "), removed key does not exist";
return;
}
for (auto& o : observers_) {
o.DatastoreEntryRemoved(this, key);
}
}
const std::string* XsurfaceDatastoreSlice::FindEntry(
const std::string& key) const {
auto iter = entries_.find(key);
return (iter != entries_.end()) ? &iter->second : nullptr;
}
std::map<std::string, std::string> XsurfaceDatastoreSlice::GetAllEntries()
const {
return entries_;
}
void XsurfaceDatastoreSlice::AddObserver(
XsurfaceDatastoreDataReader::Observer* o) {
observers_.AddObserver(o);
}
void XsurfaceDatastoreSlice::RemoveObserver(
XsurfaceDatastoreDataReader::Observer* o) {
observers_.RemoveObserver(o);
}
XsurfaceDatastoreAggregate::XsurfaceDatastoreAggregate(
std::vector<raw_ptr<XsurfaceDatastoreDataReader>> sources)
: sources_(std::move(sources)) {
for (XsurfaceDatastoreDataReader* s : sources_) {
s->AddObserver(this);
}
}
XsurfaceDatastoreAggregate::~XsurfaceDatastoreAggregate() {
for (XsurfaceDatastoreDataReader* s : sources_) {
s->RemoveObserver(this);
}
}
void XsurfaceDatastoreAggregate::AddObserver(
XsurfaceDatastoreDataReader::Observer* o) {
observers_.AddObserver(o);
}
void XsurfaceDatastoreAggregate::RemoveObserver(
XsurfaceDatastoreDataReader::Observer* o) {
observers_.RemoveObserver(o);
}
const std::string* XsurfaceDatastoreAggregate::FindEntry(
const std::string& key) const {
// It is assumed that each key provider provides a disjoint set of keys, so
// any given key should have only one entry.
for (XsurfaceDatastoreDataReader* s : sources_) {
const std::string* result = s->FindEntry(key);
if (result)
return result;
}
return nullptr;
}
void XsurfaceDatastoreAggregate::DatastoreEntryUpdated(
XsurfaceDatastoreDataReader* source,
const std::string& key) {
for (XsurfaceDatastoreDataReader::Observer& o : observers_) {
o.DatastoreEntryUpdated(this, key);
}
}
void XsurfaceDatastoreAggregate::DatastoreEntryRemoved(
XsurfaceDatastoreDataReader* source,
const std::string& key) {
for (XsurfaceDatastoreDataReader::Observer& o : observers_) {
o.DatastoreEntryRemoved(this, key);
}
}
std::map<std::string, std::string> XsurfaceDatastoreAggregate::GetAllEntries()
const {
std::map<std::string, std::string> result;
for (XsurfaceDatastoreDataReader* s : sources_) {
std::map<std::string, std::string> sub_entries = s->GetAllEntries();
result.insert(std::make_move_iterator(sub_entries.begin()),
std::make_move_iterator(sub_entries.end()));
}
return result;
}
} // namespace feed
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