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      1 // Copyright 2014 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "chrome/browser/drive/drive_app_registry.h"
      6 
      7 #include <algorithm>
      8 #include <set>
      9 #include <utility>
     10 
     11 #include "base/callback.h"
     12 #include "base/files/file_path.h"
     13 #include "chrome/browser/drive/drive_app_registry_observer.h"
     14 #include "chrome/browser/drive/drive_service_interface.h"
     15 #include "content/public/browser/browser_thread.h"
     16 #include "google_apis/drive/drive_api_parser.h"
     17 #include "google_apis/google_api_keys.h"
     18 
     19 using content::BrowserThread;
     20 
     21 namespace {
     22 
     23 // Add {selector -> app_id} mapping to |map|.
     24 void AddAppSelectorList(const ScopedVector<std::string>& selectors,
     25                         const std::string& app_id,
     26                         std::multimap<std::string, std::string>* map) {
     27   for (size_t i = 0; i < selectors.size(); ++i)
     28     map->insert(std::make_pair(*selectors[i], app_id));
     29 }
     30 
     31 // Append list of app ids in |map| looked up by |selector| to |matched_apps|.
     32 void FindAppsForSelector(const std::string& selector,
     33                          const std::multimap<std::string, std::string>& map,
     34                          std::vector<std::string>* matched_apps) {
     35   typedef std::multimap<std::string, std::string>::const_iterator iterator;
     36   std::pair<iterator, iterator> range = map.equal_range(selector);
     37   for (iterator it = range.first; it != range.second; ++it)
     38     matched_apps->push_back(it->second);
     39 }
     40 
     41 void RemoveAppFromSelector(const std::string& app_id,
     42                            std::multimap<std::string, std::string>* map) {
     43   typedef std::multimap<std::string, std::string>::iterator iterator;
     44   for (iterator it = map->begin(); it != map->end(); ) {
     45     iterator now = it++;
     46     if (now->second == app_id)
     47       map->erase(now);
     48   }
     49 }
     50 
     51 }  // namespace
     52 
     53 namespace drive {
     54 
     55 DriveAppInfo::DriveAppInfo() {
     56 }
     57 
     58 DriveAppInfo::DriveAppInfo(
     59     const std::string& app_id,
     60     const std::string& product_id,
     61     const IconList& app_icons,
     62     const IconList& document_icons,
     63     const std::string& app_name,
     64     const GURL& create_url,
     65     bool is_removable)
     66     : app_id(app_id),
     67       product_id(product_id),
     68       app_icons(app_icons),
     69       document_icons(document_icons),
     70       app_name(app_name),
     71       create_url(create_url),
     72       is_removable(is_removable) {
     73 }
     74 
     75 DriveAppInfo::~DriveAppInfo() {
     76 }
     77 
     78 DriveAppRegistry::DriveAppRegistry(DriveServiceInterface* drive_service)
     79     : drive_service_(drive_service),
     80       is_updating_(false),
     81       weak_ptr_factory_(this) {
     82 }
     83 
     84 DriveAppRegistry::~DriveAppRegistry() {
     85 }
     86 
     87 void DriveAppRegistry::GetAppsForFile(
     88     const base::FilePath::StringType& file_extension,
     89     const std::string& mime_type,
     90     std::vector<DriveAppInfo>* apps) const {
     91   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
     92 
     93   std::vector<std::string> matched_apps;
     94   if (!file_extension.empty()) {
     95     const std::string without_dot =
     96         base::FilePath(file_extension.substr(1)).AsUTF8Unsafe();
     97     FindAppsForSelector(without_dot, extension_map_, &matched_apps);
     98   }
     99   if (!mime_type.empty())
    100     FindAppsForSelector(mime_type, mimetype_map_, &matched_apps);
    101 
    102   // Insert found Drive apps into |apps|, but skip duplicate results.
    103   std::set<std::string> inserted_app_ids;
    104   for (size_t i = 0; i < matched_apps.size(); ++i) {
    105     if (inserted_app_ids.count(matched_apps[i]) == 0) {
    106       inserted_app_ids.insert(matched_apps[i]);
    107       std::map<std::string, DriveAppInfo>::const_iterator it =
    108           all_apps_.find(matched_apps[i]);
    109       DCHECK(it != all_apps_.end());
    110       apps->push_back(it->second);
    111     }
    112   }
    113 }
    114 
    115 void DriveAppRegistry::GetAppList(std::vector<DriveAppInfo>* apps) const {
    116   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
    117 
    118   apps->clear();
    119   for (std::map<std::string, DriveAppInfo>::const_iterator
    120           it = all_apps_.begin(); it != all_apps_.end(); ++it) {
    121     apps->push_back(it->second);
    122   }
    123 }
    124 
    125 void DriveAppRegistry::Update() {
    126   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
    127 
    128   if (is_updating_)  // There is already an update in progress.
    129     return;
    130   is_updating_ = true;
    131 
    132   drive_service_->GetAppList(
    133       base::Bind(&DriveAppRegistry::UpdateAfterGetAppList,
    134                  weak_ptr_factory_.GetWeakPtr()));
    135 }
    136 
    137 void DriveAppRegistry::UpdateAfterGetAppList(
    138     google_apis::GDataErrorCode gdata_error,
    139     scoped_ptr<google_apis::AppList> app_list) {
    140   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
    141 
    142   DCHECK(is_updating_);
    143   is_updating_ = false;
    144 
    145   // Failed to fetch the data from the server. We can do nothing here.
    146   if (gdata_error != google_apis::HTTP_SUCCESS)
    147     return;
    148 
    149   DCHECK(app_list);
    150   UpdateFromAppList(*app_list);
    151 }
    152 
    153 void DriveAppRegistry::UpdateFromAppList(const google_apis::AppList& app_list) {
    154   all_apps_.clear();
    155   extension_map_.clear();
    156   mimetype_map_.clear();
    157 
    158   for (size_t i = 0; i < app_list.items().size(); ++i) {
    159     const google_apis::AppResource& app = *app_list.items()[i];
    160     const std::string id = app.application_id();
    161 
    162     DriveAppInfo::IconList app_icons;
    163     DriveAppInfo::IconList document_icons;
    164     for (size_t j = 0; j < app.icons().size(); ++j) {
    165       const google_apis::DriveAppIcon& icon = *app.icons()[j];
    166       if (icon.icon_url().is_empty())
    167         continue;
    168       if (icon.category() == google_apis::DriveAppIcon::APPLICATION)
    169         app_icons.push_back(std::make_pair(icon.icon_side_length(),
    170                                            icon.icon_url()));
    171       if (icon.category() == google_apis::DriveAppIcon::DOCUMENT)
    172         document_icons.push_back(std::make_pair(icon.icon_side_length(),
    173                                                 icon.icon_url()));
    174     }
    175 
    176     all_apps_[id] = DriveAppInfo(app.application_id(),
    177                                  app.product_id(),
    178                                  app_icons,
    179                                  document_icons,
    180                                  app.name(),
    181                                  app.create_url(),
    182                                  app.is_removable());
    183 
    184     // TODO(kinaba): consider taking primary/secondary distinction into account.
    185     AddAppSelectorList(app.primary_mimetypes(), id, &mimetype_map_);
    186     AddAppSelectorList(app.secondary_mimetypes(), id, &mimetype_map_);
    187     AddAppSelectorList(app.primary_file_extensions(), id, &extension_map_);
    188     AddAppSelectorList(app.secondary_file_extensions(), id, &extension_map_);
    189   }
    190 
    191   FOR_EACH_OBSERVER(DriveAppRegistryObserver,
    192                     observers_,
    193                     OnDriveAppRegistryUpdated());
    194 }
    195 
    196 void DriveAppRegistry::AddObserver(DriveAppRegistryObserver* observer) {
    197   observers_.AddObserver(observer);
    198 }
    199 
    200 void DriveAppRegistry::RemoveObserver(DriveAppRegistryObserver* observer) {
    201   observers_.RemoveObserver(observer);
    202 }
    203 
    204 void DriveAppRegistry::UninstallApp(const std::string& app_id,
    205                                     const UninstallCallback& callback) {
    206   DCHECK(!callback.is_null());
    207 
    208   drive_service_->UninstallApp(app_id,
    209                                base::Bind(&DriveAppRegistry::OnAppUninstalled,
    210                                           weak_ptr_factory_.GetWeakPtr(),
    211                                           app_id,
    212                                           callback));
    213 }
    214 
    215 void DriveAppRegistry::OnAppUninstalled(const std::string& app_id,
    216                                         const UninstallCallback& callback,
    217                                         google_apis::GDataErrorCode error) {
    218   if (error == google_apis::HTTP_NO_CONTENT) {
    219     all_apps_.erase(app_id);
    220     RemoveAppFromSelector(app_id, &mimetype_map_);
    221     RemoveAppFromSelector(app_id, &extension_map_);
    222   }
    223   callback.Run(error);
    224 }
    225 
    226 // static
    227 bool DriveAppRegistry::IsAppUninstallSupported() {
    228   return google_apis::IsGoogleChromeAPIKeyUsed();
    229 }
    230 
    231 namespace util {
    232 
    233 GURL FindPreferredIcon(const DriveAppInfo::IconList& icons,
    234                        int preferred_size) {
    235   if (icons.empty())
    236     return GURL();
    237 
    238   DriveAppInfo::IconList sorted_icons = icons;
    239   std::sort(sorted_icons.rbegin(), sorted_icons.rend());
    240 
    241   // Go forward while the size is larger or equal to preferred_size.
    242   size_t i = 1;
    243   while (i < sorted_icons.size() && sorted_icons[i].first >= preferred_size)
    244     ++i;
    245   return sorted_icons[i - 1].second;
    246 }
    247 
    248 }  // namespace util
    249 }  // namespace drive
    250