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      1 // Copyright (c) 2012 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/chromeos/dbus/printer_service_provider.h"
      6 
      7 #include "ash/session_state_delegate.h"
      8 #include "ash/shell.h"
      9 #include "ash/wm/window_util.h"
     10 #include "base/bind.h"
     11 #include "base/bind_helpers.h"
     12 #include "base/metrics/histogram.h"
     13 #include "base/strings/stringprintf.h"
     14 #include "chrome/browser/profiles/profile_manager.h"
     15 #include "chrome/browser/ui/browser.h"
     16 #include "chrome/browser/ui/browser_tabstrip.h"
     17 #include "chrome/browser/ui/browser_window.h"
     18 #include "chrome/browser/ui/scoped_tabbed_browser_displayer.h"
     19 #include "chrome/browser/ui/tab_contents/tab_contents_iterator.h"
     20 #include "chrome/browser/ui/tabs/tab_strip_model.h"
     21 #include "content/public/browser/browser_thread.h"
     22 #include "content/public/browser/web_contents.h"
     23 #include "dbus/bus.h"
     24 #include "dbus/exported_object.h"
     25 #include "dbus/message.h"
     26 #include "net/base/escape.h"
     27 #include "third_party/cros_system_api/dbus/service_constants.h"
     28 #include "ui/aura/window.h"
     29 
     30 namespace {
     31 
     32 const char kPrinterAdded[] = "PrinterAdded";
     33 
     34 enum PrinterServiceEvent {
     35   PRINTER_ADDED,
     36   PAGE_DISPLAYED,
     37   PRINTER_SERVICE_EVENT_MAX,
     38 };
     39 
     40 // TODO(vitalybuka): update URL with more relevant information.
     41 const char kCloudPrintLearnUrl[] =
     42     "https://www.google.com/landing/cloudprint/index.html";
     43 
     44 void ActivateContents(Browser* browser, content::WebContents* contents) {
     45   browser->tab_strip_model()->ActivateTabAt(
     46       browser->tab_strip_model()->GetIndexOfWebContents(contents), false);
     47 }
     48 
     49 Browser* ActivateAndGetBrowserForUrl(GURL url) {
     50   for (TabContentsIterator it; !it.done(); it.Next()) {
     51     if (it->GetLastCommittedURL() == url) {
     52       ActivateContents(it.browser(), *it);
     53       return it.browser();
     54     }
     55   }
     56   return NULL;
     57 }
     58 
     59 void FindOrOpenCloudPrintPage(const std::string& /* vendor */,
     60                               const std::string& /* product */) {
     61   UMA_HISTOGRAM_ENUMERATION("PrinterService.PrinterServiceEvent", PRINTER_ADDED,
     62                             PRINTER_SERVICE_EVENT_MAX);
     63   if (!ash::Shell::GetInstance()->session_state_delegate()->
     64           IsActiveUserSessionStarted() ||
     65       ash::Shell::GetInstance()->session_state_delegate()->IsScreenLocked()) {
     66     return;
     67   }
     68 
     69   Profile* profile = ProfileManager::GetLastUsedProfile();
     70   if (!profile)
     71     return;
     72 
     73   GURL url(kCloudPrintLearnUrl);
     74 
     75   if (!ActivateAndGetBrowserForUrl(url)) {
     76     chrome::ScopedTabbedBrowserDisplayer displayer(
     77         profile, chrome::HOST_DESKTOP_TYPE_ASH);
     78     UMA_HISTOGRAM_ENUMERATION("PrinterService.PrinterServiceEvent",
     79                               PAGE_DISPLAYED, PRINTER_SERVICE_EVENT_MAX);
     80     chrome::AddSelectedTabWithURL(displayer.browser(), url,
     81                                   content::PAGE_TRANSITION_LINK);
     82   }
     83 }
     84 
     85 }  // namespace
     86 
     87 namespace chromeos {
     88 
     89 PrinterServiceProvider::PrinterServiceProvider()
     90     : weak_ptr_factory_(this) {
     91 }
     92 
     93 PrinterServiceProvider::~PrinterServiceProvider() {
     94 }
     95 
     96 void PrinterServiceProvider::Start(
     97     scoped_refptr<dbus::ExportedObject> exported_object) {
     98 
     99   exported_object_ = exported_object;
    100   DVLOG(1) << "PrinterServiceProvider started";
    101   exported_object_->ExportMethod(
    102       kLibCrosServiceInterface,
    103       kPrinterAdded,
    104       base::Bind(&PrinterServiceProvider::PrinterAdded,
    105                  weak_ptr_factory_.GetWeakPtr()),
    106       base::Bind(&PrinterServiceProvider::OnExported,
    107                  weak_ptr_factory_.GetWeakPtr()));
    108 }
    109 
    110 void PrinterServiceProvider::OnExported(
    111     const std::string& interface_name,
    112     const std::string& method_name,
    113     bool success) {
    114   if (!success) {
    115     LOG(ERROR) << "Failed to export " << interface_name << "."
    116                << method_name;
    117   }
    118   DVLOG(1) << "Method exported: " << interface_name << "." << method_name;
    119 }
    120 
    121 void PrinterServiceProvider::ShowCloudPrintHelp(const std::string& vendor,
    122                                                 const std::string& product) {
    123   content::BrowserThread::PostTask(content::BrowserThread::UI, FROM_HERE,
    124                                    base::Bind(&FindOrOpenCloudPrintPage, vendor,
    125                                               product));
    126 }
    127 
    128 void PrinterServiceProvider::PrinterAdded(
    129     dbus::MethodCall* method_call,
    130     dbus::ExportedObject::ResponseSender response_sender) {
    131   DVLOG(1) << "PrinterAdded " << method_call->ToString();
    132 
    133   dbus::MessageReader reader(method_call);
    134   std::string vendor;
    135   std::string product;
    136   // Don't check for error, parameters are optional. If some string is empty
    137   // web server will show generic help page.
    138   reader.PopString(&vendor);
    139   reader.PopString(&product);
    140   ShowCloudPrintHelp(vendor, product);
    141 
    142   // Send an empty response.
    143   response_sender.Run(dbus::Response::FromMethodCall(method_call));
    144 }
    145 
    146 }  // namespace chromeos
    147 
    148