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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/common/extensions/feature.h"
#include <map>
#include "base/lazy_instance.h"
#include "base/stringprintf.h"
namespace {
struct Mappings {
Mappings() {
extension_types["extension"] = Extension::TYPE_EXTENSION;
extension_types["theme"] = Extension::TYPE_THEME;
extension_types["packaged_app"] = Extension::TYPE_PACKAGED_APP;
extension_types["hosted_app"] = Extension::TYPE_HOSTED_APP;
extension_types["platform_app"] = Extension::TYPE_PLATFORM_APP;
contexts["privileged"] = extensions::Feature::PRIVILEGED_CONTEXT;
contexts["unprivileged"] = extensions::Feature::UNPRIVILEGED_CONTEXT;
contexts["content_script"] = extensions::Feature::CONTENT_SCRIPT_CONTEXT;
locations["component"] = extensions::Feature::COMPONENT_LOCATION;
platforms["chromeos"] = extensions::Feature::CHROMEOS_PLATFORM;
}
std::map<std::string, Extension::Type> extension_types;
std::map<std::string, extensions::Feature::Context> contexts;
std::map<std::string, extensions::Feature::Location> locations;
std::map<std::string, extensions::Feature::Platform> platforms;
};
static base::LazyInstance<Mappings> g_mappings =
LAZY_INSTANCE_INITIALIZER;
// TODO(aa): Can we replace all this manual parsing with JSON schema stuff?
void ParseSet(const DictionaryValue* value,
const std::string& property,
std::set<std::string>* set) {
ListValue* list_value = NULL;
if (!value->GetList(property, &list_value))
return;
for (size_t i = 0; i < list_value->GetSize(); ++i) {
std::string str_val;
CHECK(list_value->GetString(i, &str_val)) << property << " " << i;
set->insert(str_val);
}
}
template<typename T>
void ParseEnum(const std::string& string_value,
T* enum_value,
const std::map<std::string, T>& mapping) {
typename std::map<std::string, T>::const_iterator iter =
mapping.find(string_value);
CHECK(iter != mapping.end()) << string_value;
*enum_value = iter->second;
}
template<typename T>
void ParseEnum(const DictionaryValue* value,
const std::string& property,
T* enum_value,
const std::map<std::string, T>& mapping) {
std::string string_value;
if (!value->GetString(property, &string_value))
return;
ParseEnum(string_value, enum_value, mapping);
}
template<typename T>
void ParseEnumSet(const DictionaryValue* value,
const std::string& property,
std::set<T>* enum_set,
const std::map<std::string, T>& mapping) {
std::string property_string;
if (value->GetString(property, &property_string)) {
if (property_string == "all") {
for (typename std::map<std::string, T>::const_iterator j =
mapping.begin(); j != mapping.end(); ++j) {
enum_set->insert(j->second);
}
}
return;
}
std::set<std::string> string_set;
ParseSet(value, property, &string_set);
for (std::set<std::string>::iterator iter = string_set.begin();
iter != string_set.end(); ++iter) {
T enum_value = static_cast<T>(0);
ParseEnum(*iter, &enum_value, mapping);
enum_set->insert(enum_value);
}
}
} // namespace
namespace extensions {
Feature::Feature()
: location_(UNSPECIFIED_LOCATION),
platform_(UNSPECIFIED_PLATFORM),
min_manifest_version_(0),
max_manifest_version_(0) {
}
Feature::~Feature() {
}
// static
scoped_ptr<Feature> Feature::Parse(const DictionaryValue* value) {
scoped_ptr<Feature> feature(new Feature());
ParseSet(value, "whitelist", feature->whitelist());
ParseEnumSet<Extension::Type>(value, "extension_types",
feature->extension_types(),
g_mappings.Get().extension_types);
ParseEnumSet<Context>(value, "contexts", feature->contexts(),
g_mappings.Get().contexts);
ParseEnum<Location>(value, "location", &feature->location_,
g_mappings.Get().locations);
ParseEnum<Platform>(value, "platform", &feature->platform_,
g_mappings.Get().platforms);
value->GetInteger("min_manifest_version", &feature->min_manifest_version_);
value->GetInteger("max_manifest_version", &feature->max_manifest_version_);
return feature.Pass();
}
// static
Feature::Platform Feature::GetCurrentPlatform() {
#if defined(OS_CHROMEOS)
return CHROMEOS_PLATFORM;
#else
return UNSPECIFIED_PLATFORM;
#endif
}
// static
Feature::Location Feature::ConvertLocation(Extension::Location location) {
if (location == Extension::COMPONENT)
return COMPONENT_LOCATION;
else
return UNSPECIFIED_LOCATION;
}
std::string Feature::GetErrorMessage(Feature::Availability result) {
switch (result) {
case IS_AVAILABLE:
return "";
case NOT_FOUND_IN_WHITELIST:
return "Not allowed for specified extension ID.";
case INVALID_TYPE:
return "Not allowed for specified package type (theme, app, etc.).";
case INVALID_CONTEXT:
return "Not allowed for specified context type content script, extension "
"page, web page, etc.).";
case INVALID_LOCATION:
return "Not allowed for specified install location.";
case INVALID_PLATFORM:
return "Not allowed for specified platform.";
case INVALID_MIN_MANIFEST_VERSION:
return base::StringPrintf("Requires manifest version of at least %d.",
min_manifest_version_);
case INVALID_MAX_MANIFEST_VERSION:
return base::StringPrintf("Requires manifest version of %d or lower.",
max_manifest_version_);
default:
CHECK(false);
return "";
}
}
Feature::Availability Feature::IsAvailable(const std::string& extension_id,
Extension::Type type,
Location location,
Context context,
Platform platform,
int manifest_version) {
if (!whitelist_.empty() &&
whitelist_.find(extension_id) == whitelist_.end()) {
return NOT_FOUND_IN_WHITELIST;
}
if (!extension_types_.empty() &&
extension_types_.find(type) == extension_types_.end()) {
return INVALID_TYPE;
}
if (!contexts_.empty() &&
contexts_.find(context) == contexts_.end()) {
return INVALID_CONTEXT;
}
if (location_ != UNSPECIFIED_LOCATION && location_ != location)
return INVALID_LOCATION;
if (platform_ != UNSPECIFIED_PLATFORM && platform_ != platform)
return INVALID_PLATFORM;
if (min_manifest_version_ != 0 && manifest_version < min_manifest_version_)
return INVALID_MIN_MANIFEST_VERSION;
if (max_manifest_version_ != 0 && manifest_version > max_manifest_version_)
return INVALID_MAX_MANIFEST_VERSION;
return IS_AVAILABLE;
}
} // namespace
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