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// Copyright 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 "chrome/common/extensions/permissions/permission_message_util.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/utf_string_conversions.h"
#include "content/public/common/url_constants.h"
#include "extensions/common/permissions/permission_message.h"
#include "extensions/common/permissions/permission_set.h"
#include "extensions/common/url_pattern_set.h"
#include "grit/generated_resources.h"
#include "net/base/registry_controlled_domains/registry_controlled_domain.h"
#include "ui/base/l10n/l10n_util.h"
using extensions::PermissionMessage;
using extensions::PermissionSet;
using extensions::URLPatternSet;
namespace {
// Helper for GetDistinctHosts(): com > net > org > everything else.
bool RcdBetterThan(const std::string& a, const std::string& b) {
if (a == b)
return false;
if (a == "com")
return true;
if (a == "net")
return b != "com";
if (a == "org")
return b != "com" && b != "net";
return false;
}
} // namespace
namespace permission_message_util {
PermissionMessage CreateFromHostList(const std::set<std::string>& hosts) {
std::vector<std::string> host_list(hosts.begin(), hosts.end());
DCHECK(host_list.size());
PermissionMessage::ID message_id;
base::string16 message;
base::string16 details;
switch (host_list.size()) {
case 1:
message_id = PermissionMessage::kHosts1;
message = l10n_util::GetStringFUTF16(IDS_EXTENSION_PROMPT_WARNING_1_HOST,
base::UTF8ToUTF16(host_list[0]));
break;
case 2:
message_id = PermissionMessage::kHosts2;
message = l10n_util::GetStringFUTF16(IDS_EXTENSION_PROMPT_WARNING_2_HOSTS,
base::UTF8ToUTF16(host_list[0]),
base::UTF8ToUTF16(host_list[1]));
break;
case 3:
message_id = PermissionMessage::kHosts3;
message = l10n_util::GetStringFUTF16(IDS_EXTENSION_PROMPT_WARNING_3_HOSTS,
base::UTF8ToUTF16(host_list[0]),
base::UTF8ToUTF16(host_list[1]),
base::UTF8ToUTF16(host_list[2]));
break;
default:
message_id = PermissionMessage::kHosts4OrMore;
const int kRetainedFilesMessageIDs[6] = {
IDS_EXTENSION_PROMPT_WARNING_HOSTS_DEFAULT,
IDS_EXTENSION_PROMPT_WARNING_HOST_SINGULAR,
IDS_EXTENSION_PROMPT_WARNING_HOSTS_ZERO,
IDS_EXTENSION_PROMPT_WARNING_HOSTS_TWO,
IDS_EXTENSION_PROMPT_WARNING_HOSTS_FEW,
IDS_EXTENSION_PROMPT_WARNING_HOSTS_MANY,
};
std::vector<int> message_ids;
for (size_t i = 0; i < arraysize(kRetainedFilesMessageIDs); i++) {
message_ids.push_back(kRetainedFilesMessageIDs[i]);
}
message = l10n_util::GetPluralStringFUTF16(message_ids, host_list.size());
for (size_t i = 0; i < host_list.size(); ++i) {
if (i > 0)
details += base::ASCIIToUTF16("\n");
details += l10n_util::GetStringFUTF16(
IDS_EXTENSION_PROMPT_WARNING_HOST_LIST_ENTRY,
base::UTF8ToUTF16(host_list[i]));
}
}
return PermissionMessage(message_id, message, details);
}
std::set<std::string> GetDistinctHosts(
const URLPatternSet& host_patterns,
bool include_rcd,
bool exclude_file_scheme) {
// Use a vector to preserve order (also faster than a map on small sets).
// Each item is a host split into two parts: host without RCDs and
// current best RCD.
typedef std::vector<std::pair<std::string, std::string> > HostVector;
HostVector hosts_best_rcd;
for (URLPatternSet::const_iterator i = host_patterns.begin();
i != host_patterns.end(); ++i) {
if (exclude_file_scheme && i->scheme() == chrome::kFileScheme)
continue;
std::string host = i->host();
// Add the subdomain wildcard back to the host, if necessary.
if (i->match_subdomains())
host = "*." + host;
// If the host has an RCD, split it off so we can detect duplicates.
std::string rcd;
size_t reg_len = net::registry_controlled_domains::GetRegistryLength(
host,
net::registry_controlled_domains::EXCLUDE_UNKNOWN_REGISTRIES,
net::registry_controlled_domains::EXCLUDE_PRIVATE_REGISTRIES);
if (reg_len && reg_len != std::string::npos) {
if (include_rcd) // else leave rcd empty
rcd = host.substr(host.size() - reg_len);
host = host.substr(0, host.size() - reg_len);
}
// Check if we've already seen this host.
HostVector::iterator it = hosts_best_rcd.begin();
for (; it != hosts_best_rcd.end(); ++it) {
if (it->first == host)
break;
}
// If this host was found, replace the RCD if this one is better.
if (it != hosts_best_rcd.end()) {
if (include_rcd && RcdBetterThan(rcd, it->second))
it->second = rcd;
} else { // Previously unseen host, append it.
hosts_best_rcd.push_back(std::make_pair(host, rcd));
}
}
// Build up the final vector by concatenating hosts and RCDs.
std::set<std::string> distinct_hosts;
for (HostVector::iterator it = hosts_best_rcd.begin();
it != hosts_best_rcd.end(); ++it)
distinct_hosts.insert(it->first + it->second);
return distinct_hosts;
}
} // namespace permission_message_util
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