Cleanup Tool WebUI: Add functionality to the Scan button

chrome/browser/ui/webui/cleanup_tool/cleanup_action_handler.cc

 // Copyright 2017 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/ui/webui/cleanup_tool/cleanup_action_handler.h"
 
 #include "base/bind.h"
+#include "base/timer/timer.h"
 #include "base/values.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/component_updater/sw_reporter_installer_win.h"
+
+namespace {
+
+bool IsCleanupComponentRegistered() {
+  component_updater::ComponentUpdateService* cus =
+      g_browser_process->component_updater();
+  std::vector<std::string> component_ids = cus->GetComponentIDs();
+
+  return std::find(component_ids.begin(), component_ids.end(),
+                   component_updater::kSwReporterComponentId) !=
+         component_ids.end();
+}
+
+constexpr char kDetectionOkText[] = "No problems detected";

[ftirelo, 2017/04/18 13:50:59]

Nit: please add a comment saying that these are placeholders that will be
replaced once we connect to the reporter runner.

[proberge, 2017/04/18 15:28:17]

I don't think the strings will come from the reporter so omitting that part.
Otherwise done. 

+constexpr char kDetectionUwSText[] = "2 potentially harmful programs detected";
+constexpr char kDetectionTimeText[] = "Last scanned today";
+constexpr char kCleanupUnsupportedText[] = "Chrome Cleanup is not supported.";
+constexpr char kUnsupportedHelpText[] = "Please try reinstalling Chrome";
+
+}  // namespace
 
 CleanupActionHandler::CleanupActionHandler() {}
 
 CleanupActionHandler::~CleanupActionHandler() {}
 
 void CleanupActionHandler::RegisterMessages() {
   web_ui()->RegisterMessageCallback(
       "requestLastScanResult",
       base::Bind(&CleanupActionHandler::HandleRequestLastScanResult,
                  base::Unretained(this)));
+  web_ui()->RegisterMessageCallback(
+      "startScan", base::Bind(&CleanupActionHandler::HandleStartScan,
+                              base::Unretained(this)));
 }
 
 void CleanupActionHandler::HandleRequestLastScanResult(
     const base::ListValue* args) {
   std::string webui_callback_id;
   CHECK_EQ(1U, args->GetSize());
   bool success = args->GetString(0, &webui_callback_id);
   DCHECK(success);
 
   base::DictionaryValue last_scan_results;
   // TODO(proberge): Return real information about the last run.
   // TODO(proberge): Localize strings once they are finalized.
   last_scan_results.SetBoolean("hasScanResults", false);
   last_scan_results.SetBoolean("isInfected", false);
-  last_scan_results.SetString("detectionStatusText", "No problems detected");
-  last_scan_results.SetString("detectionTimeText", "Last scanned today");
+  last_scan_results.SetString("detectionStatusText", kDetectionOkText);
+  last_scan_results.SetString("detectionTimeText", kDetectionTimeText);
 
   AllowJavascript();
   ResolveJavascriptCallback(base::Value(webui_callback_id), last_scan_results);
 }
+
+void CleanupActionHandler::HandleStartScan(const base::ListValue* args) {
+  std::string webui_callback_id;
+  CHECK_EQ(1U, args->GetSize());
+  bool success = args->GetString(0, &webui_callback_id);
+  DCHECK(success);
+
+  if (!IsCleanupComponentRegistered()) {
+    base::DictionaryValue scan_results;
+    // TODO(proberge): Localize strings once they are finalized.
+    scan_results.SetBoolean("hasScanResults", false);
+    scan_results.SetBoolean("isInfected", false);
+    scan_results.SetString("detectionStatusText", kCleanupUnsupportedText);
+    scan_results.SetString("detectionTimeText", kUnsupportedHelpText);
+
+    AllowJavascript();
+    ResolveJavascriptCallback(base::Value(webui_callback_id), scan_results);
+    return;
+  }
+
+  component_updater::RegisterUserInitiatedSwReporterScan(
+      base::Bind(&CleanupActionHandler::ReportScanResults,
+                 base::Unretained(this), webui_callback_id));
+}
+
+void CleanupActionHandler::ReportScanResults(const std::string& callback_id) {
+  base::DictionaryValue scan_results;
+  // TODO(proberge): Return real information about the scan.
+  // TODO(proberge): Localize strings once they are finalized.
+  scan_results.SetBoolean("hasScanResults", true);
+  scan_results.SetBoolean("isInfected", true);
+  scan_results.SetString("detectionStatusText", kDetectionUwSText);
+  scan_results.SetString("detectionTimeText", kDetectionTimeText);
+
+  AllowJavascript();
+  ResolveJavascriptCallback(base::Value(callback_id), scan_results);
+}