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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 "chrome/browser/extensions/api/declarative/initializing_rules_registry.h"
#include "base/logging.h"
#include "base/stringprintf.h"
#include "base/values.h"
namespace {
std::string ToId(int identifier) {
return base::StringPrintf("_%d_", identifier);
}
} // namespace
namespace extensions {
InitializingRulesRegistry::InitializingRulesRegistry(
scoped_refptr<RulesRegistry> delegate)
: delegate_(delegate),
last_generated_rule_identifier_id_(0) {
}
std::string InitializingRulesRegistry::AddRules(
const std::string& extension_id,
const std::vector<linked_ptr<RulesRegistry::Rule> >& rules) {
std::string error = CheckAndFillInOptionalRules(extension_id, rules);
if (!error.empty())
return error;
FillInOptionalPriorities(rules);
return delegate_->AddRules(extension_id, rules);
}
std::string InitializingRulesRegistry::RemoveRules(
const std::string& extension_id,
const std::vector<std::string>& rule_identifiers) {
std::string error = delegate_->RemoveRules(extension_id, rule_identifiers);
if (!error.empty())
return error;
RemoveUsedRuleIdentifiers(extension_id, rule_identifiers);
return std::string();
}
std::string InitializingRulesRegistry::RemoveAllRules(
const std::string& extension_id) {
std::string error = delegate_->RemoveAllRules(extension_id);
if (!error.empty())
return error;
RemoveAllUsedRuleIdentifiers(extension_id);
return std::string();
}
std::string InitializingRulesRegistry::GetRules(
const std::string& extension_id,
const std::vector<std::string>& rule_identifiers,
std::vector<linked_ptr<RulesRegistry::Rule> >* out) {
return delegate_->GetRules(extension_id, rule_identifiers, out);
}
std::string InitializingRulesRegistry::GetAllRules(
const std::string& extension_id,
std::vector<linked_ptr<RulesRegistry::Rule> >* out) {
return delegate_->GetAllRules(extension_id, out);
}
void InitializingRulesRegistry::OnExtensionUnloaded(
const std::string& extension_id) {
delegate_->OnExtensionUnloaded(extension_id);
}
content::BrowserThread::ID InitializingRulesRegistry::GetOwnerThread() const {
return delegate_->GetOwnerThread();
}
InitializingRulesRegistry::~InitializingRulesRegistry() {}
bool InitializingRulesRegistry::IsUniqueId(
const std::string& extension_id,
const std::string& rule_id) const {
RuleIdentifiersMap::const_iterator identifiers =
used_rule_identifiers_.find(extension_id);
if (identifiers == used_rule_identifiers_.end())
return true;
return identifiers->second.find(rule_id) == identifiers->second.end();
}
std::string InitializingRulesRegistry::GenerateUniqueId(
const std::string& extension_id) {
while (!IsUniqueId(extension_id, ToId(last_generated_rule_identifier_id_)))
++last_generated_rule_identifier_id_;
return ToId(last_generated_rule_identifier_id_);
}
std::string InitializingRulesRegistry::CheckAndFillInOptionalRules(
const std::string& extension_id,
const std::vector<linked_ptr<RulesRegistry::Rule> >& rules) {
// IDs we have inserted, in case we need to rollback this operation.
std::vector<std::string> rollback_log;
// First we insert all rules with existing identifier, so that generated
// identifiers cannot collide with identifiers passed by the caller.
for (std::vector<linked_ptr<RulesRegistry::Rule> >::const_iterator i =
rules.begin(); i != rules.end(); ++i) {
RulesRegistry::Rule* rule = i->get();
if (rule->id.get()) {
std::string id = *(rule->id);
if (!IsUniqueId(extension_id, id)) {
RemoveUsedRuleIdentifiers(extension_id, rollback_log);
return "Id " + id + " was used multiple times.";
}
used_rule_identifiers_[extension_id].insert(id);
}
}
// Now we generate IDs in case they were not specificed in the rules. This
// cannot fail so we do not need to keep track of a rollback log.
for (std::vector<linked_ptr<RulesRegistry::Rule> >::const_iterator i =
rules.begin(); i != rules.end(); ++i) {
RulesRegistry::Rule* rule = i->get();
if (!rule->id.get()) {
rule->id.reset(new std::string(GenerateUniqueId(extension_id)));
used_rule_identifiers_[extension_id].insert(*(rule->id));
}
}
return std::string();
}
void InitializingRulesRegistry::FillInOptionalPriorities(
const std::vector<linked_ptr<RulesRegistry::Rule> >& rules) {
std::vector<linked_ptr<RulesRegistry::Rule> >::const_iterator i;
for (i = rules.begin(); i != rules.end(); ++i) {
if (!(*i)->priority.get())
(*i)->priority.reset(new int(DEFAULT_PRIORITY));
}
}
void InitializingRulesRegistry::RemoveUsedRuleIdentifiers(
const std::string& extension_id,
const std::vector<std::string>& identifiers) {
std::vector<std::string>::const_iterator i;
for (i = identifiers.begin(); i != identifiers.end(); ++i)
used_rule_identifiers_[extension_id].erase(*i);
}
void InitializingRulesRegistry::RemoveAllUsedRuleIdentifiers(
const std::string& extension_id) {
used_rule_identifiers_.erase(extension_id);
}
} // namespace extensions
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