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// Copyright (c) 2012 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 "components/content_settings/core/browser/content_settings_origin_identifier_value_map.h"
#include <memory>
#include <tuple>
#include "base/compiler_specific.h"
#include "base/logging.h"
#include "base/synchronization/lock.h"
#include "base/values.h"
#include "components/content_settings/core/browser/content_settings_rule.h"
#include "components/content_settings/core/common/content_settings_types.h"
#include "url/gurl.h"
namespace content_settings {
namespace {
// This iterator is used for iterating the rules for |content_type| and
// |resource_identifier| in the precedence order of the rules.
class RuleIteratorImpl : public RuleIterator {
public:
// |RuleIteratorImpl| takes the ownership of |auto_lock|.
RuleIteratorImpl(
const OriginIdentifierValueMap::Rules::const_iterator& current_rule,
const OriginIdentifierValueMap::Rules::const_iterator& rule_end,
base::AutoLock* auto_lock)
: current_rule_(current_rule),
rule_end_(rule_end),
auto_lock_(auto_lock) {
}
~RuleIteratorImpl() override {}
bool HasNext() const override { return (current_rule_ != rule_end_); }
Rule Next() override {
DCHECK(HasNext());
Rule to_return(current_rule_->first.primary_pattern,
current_rule_->first.secondary_pattern,
current_rule_->second.value.Clone());
++current_rule_;
return to_return;
}
private:
OriginIdentifierValueMap::Rules::const_iterator current_rule_;
OriginIdentifierValueMap::Rules::const_iterator rule_end_;
std::unique_ptr<base::AutoLock> auto_lock_;
};
} // namespace
OriginIdentifierValueMap::EntryMapKey::EntryMapKey(
ContentSettingsType content_type,
const ResourceIdentifier& resource_identifier)
: content_type(content_type),
resource_identifier(resource_identifier) {
}
bool OriginIdentifierValueMap::EntryMapKey::operator<(
const OriginIdentifierValueMap::EntryMapKey& other) const {
return std::tie(content_type, resource_identifier) <
std::tie(other.content_type, other.resource_identifier);
}
OriginIdentifierValueMap::PatternPair::PatternPair(
const ContentSettingsPattern& primary_pattern,
const ContentSettingsPattern& secondary_pattern)
: primary_pattern(primary_pattern),
secondary_pattern(secondary_pattern) {
}
bool OriginIdentifierValueMap::PatternPair::operator<(
const OriginIdentifierValueMap::PatternPair& other) const {
// Note that this operator is the other way around than
// |ContentSettingsPattern::operator<|. It sorts patterns with higher
// precedence first.
return std::tie(primary_pattern, secondary_pattern) >
std::tie(other.primary_pattern, other.secondary_pattern);
}
OriginIdentifierValueMap::ValueEntry::ValueEntry(){};
OriginIdentifierValueMap::ValueEntry::~ValueEntry(){};
std::unique_ptr<RuleIterator> OriginIdentifierValueMap::GetRuleIterator(
ContentSettingsType content_type,
const ResourceIdentifier& resource_identifier,
base::Lock* lock) const {
EntryMapKey key(content_type, resource_identifier);
// We access |entries_| here, so we need to lock |lock_| first. The lock must
// be passed to the |RuleIteratorImpl| in a locked state, so that nobody can
// access |entries_| after |find()| but before the |RuleIteratorImpl| is
// created.
std::unique_ptr<base::AutoLock> auto_lock;
if (lock)
auto_lock.reset(new base::AutoLock(*lock));
auto it = entries_.find(key);
if (it == entries_.end())
return nullptr;
return std::unique_ptr<RuleIterator>(new RuleIteratorImpl(
it->second.begin(), it->second.end(), auto_lock.release()));
}
size_t OriginIdentifierValueMap::size() const {
size_t size = 0;
for (const auto& entry : entries_)
size += entry.second.size();
return size;
}
OriginIdentifierValueMap::OriginIdentifierValueMap() {}
OriginIdentifierValueMap::~OriginIdentifierValueMap() {}
const base::Value* OriginIdentifierValueMap::GetValue(
const GURL& primary_url,
const GURL& secondary_url,
ContentSettingsType content_type,
const ResourceIdentifier& resource_identifier) const {
EntryMapKey key(content_type, resource_identifier);
auto it = entries_.find(key);
if (it == entries_.end())
return nullptr;
// Iterate the entries in until a match is found. Since the rules are stored
// in the order of decreasing precedence, the most specific match is found
// first.
for (const auto& entry : it->second) {
if (entry.first.primary_pattern.Matches(primary_url) &&
entry.first.secondary_pattern.Matches(secondary_url)) {
return &entry.second.value;
}
}
return nullptr;
}
base::Time OriginIdentifierValueMap::GetLastModified(
const ContentSettingsPattern& primary_pattern,
const ContentSettingsPattern& secondary_pattern,
ContentSettingsType content_type,
const ResourceIdentifier& resource_identifier) const {
DCHECK(primary_pattern.IsValid());
DCHECK(secondary_pattern.IsValid());
EntryMapKey key(content_type, resource_identifier);
PatternPair patterns(primary_pattern, secondary_pattern);
auto it = entries_.find(key);
if (it == entries_.end())
return base::Time();
auto r = it->second.find(patterns);
if (r == it->second.end())
return base::Time();
return r->second.last_modified;
}
void OriginIdentifierValueMap::SetValue(
const ContentSettingsPattern& primary_pattern,
const ContentSettingsPattern& secondary_pattern,
ContentSettingsType content_type,
const ResourceIdentifier& resource_identifier,
base::Time last_modified,
base::Value value) {
DCHECK(primary_pattern.IsValid());
DCHECK(secondary_pattern.IsValid());
// TODO(raymes): Remove this after we track down the cause of
// crbug.com/531548.
CHECK_NE(CONTENT_SETTINGS_TYPE_DEFAULT, content_type);
EntryMapKey key(content_type, resource_identifier);
PatternPair patterns(primary_pattern, secondary_pattern);
ValueEntry* entry = &entries_[key][patterns];
entry->value = std::move(value);
entry->last_modified = last_modified;
}
void OriginIdentifierValueMap::DeleteValue(
const ContentSettingsPattern& primary_pattern,
const ContentSettingsPattern& secondary_pattern,
ContentSettingsType content_type,
const ResourceIdentifier& resource_identifier) {
EntryMapKey key(content_type, resource_identifier);
PatternPair patterns(primary_pattern, secondary_pattern);
auto it = entries_.find(key);
if (it == entries_.end())
return;
it->second.erase(patterns);
if (it->second.empty())
entries_.erase(it);
}
void OriginIdentifierValueMap::DeleteValues(
ContentSettingsType content_type,
const ResourceIdentifier& resource_identifier) {
EntryMapKey key(content_type, resource_identifier);
entries_.erase(key);
}
void OriginIdentifierValueMap::clear() {
// Delete all owned value objects.
entries_.clear();
}
} // namespace content_settings
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