// 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/plugins/plugin_metadata.h"

#include <stddef.h>

#include <algorithm>

#include "base/logging.h"
#include "base/strings/pattern.h"
#include "base/strings/string_util.h"
#include "content/public/common/webplugininfo.h"

// static
const char PluginMetadata::kAdobeReaderGroupName[] = "Adobe Reader";
const char PluginMetadata::kJavaGroupName[] = "Java(TM)";
const char PluginMetadata::kQuickTimeGroupName[] = "QuickTime Player";
const char PluginMetadata::kShockwaveGroupName[] = "Adobe Shockwave Player";
const char PluginMetadata::kRealPlayerGroupName[] = "RealPlayer";
const char PluginMetadata::kSilverlightGroupName[] = "Silverlight";
const char PluginMetadata::kWindowsMediaPlayerGroupName[] =
    "Windows Media Player";
const char PluginMetadata::kGoogleTalkGroupName[] = "Google Talk";
const char PluginMetadata::kGoogleEarthGroupName[] = "Google Earth";

PluginMetadata::PluginMetadata(const std::string& identifier,
                               const base::string16& name,
                               bool url_for_display,
                               const GURL& plugin_url,
                               const GURL& help_url,
                               const base::string16& group_name_matcher,
                               const std::string& language)
    : identifier_(identifier),
      name_(name),
      group_name_matcher_(group_name_matcher),
      url_for_display_(url_for_display),
      plugin_url_(plugin_url),
      help_url_(help_url),
      language_(language) {
}

PluginMetadata::~PluginMetadata() {
}

void PluginMetadata::AddVersion(const Version& version,
                                SecurityStatus status) {
  DCHECK(versions_.find(version) == versions_.end());
  versions_[version] = status;
}

void PluginMetadata::AddMimeType(const std::string& mime_type) {
  all_mime_types_.push_back(mime_type);
}

void PluginMetadata::AddMatchingMimeType(const std::string& mime_type) {
  matching_mime_types_.push_back(mime_type);
}

bool PluginMetadata::HasMimeType(const std::string& mime_type) const {
  return std::find(all_mime_types_.begin(), all_mime_types_.end(), mime_type) !=
      all_mime_types_.end();
}

bool PluginMetadata::MatchesPlugin(const content::WebPluginInfo& plugin) {
  for (size_t i = 0; i < matching_mime_types_.size(); ++i) {
    // To have a match, every one of the |matching_mime_types_|
    // must be handled by the plugin.
    size_t j = 0;
    for (; j < plugin.mime_types.size(); ++j) {
      if (plugin.mime_types[j].mime_type == matching_mime_types_[i])
        break;
    }
    if (j == plugin.mime_types.size())
      return false;
  }

  return base::MatchPattern(plugin.name, group_name_matcher_);
}

// static
bool PluginMetadata::ParseSecurityStatus(
    const std::string& status_str,
    PluginMetadata::SecurityStatus* status) {
  if (status_str == "up_to_date")
    *status = SECURITY_STATUS_UP_TO_DATE;
  else if (status_str == "out_of_date")
    *status = SECURITY_STATUS_OUT_OF_DATE;
  else if (status_str == "requires_authorization")
    *status = SECURITY_STATUS_REQUIRES_AUTHORIZATION;
  else
    return false;

  return true;
}

PluginMetadata::SecurityStatus PluginMetadata::GetSecurityStatus(
    const content::WebPluginInfo& plugin) const {
  if (versions_.empty()) {
    // Unknown plugins require authorization.
    return SECURITY_STATUS_REQUIRES_AUTHORIZATION;
  }

  Version version;
  content::WebPluginInfo::CreateVersionFromString(plugin.version, &version);
  if (!version.IsValid())
    version = Version("0");

  // |lower_bound| returns the latest version that is not newer than |version|.
  std::map<Version, SecurityStatus, VersionComparator>::const_iterator it =
      versions_.lower_bound(version);
  // If there is at least one version defined, everything older than the oldest
  // defined version is considered out-of-date.
  if (it == versions_.end())
    return SECURITY_STATUS_OUT_OF_DATE;

  return it->second;
}

bool PluginMetadata::VersionComparator::operator() (const Version& lhs,
                                                    const Version& rhs) const {
  // Keep versions ordered by newest (biggest) first.
  return lhs.CompareTo(rhs) > 0;
}

scoped_ptr<PluginMetadata> PluginMetadata::Clone() const {
  PluginMetadata* copy = new PluginMetadata(identifier_,
                                            name_,
                                            url_for_display_,
                                            plugin_url_,
                                            help_url_,
                                            group_name_matcher_,
                                            language_);
  copy->versions_ = versions_;
  return make_scoped_ptr(copy);
}