gdata: Add GCache Contents section to chrome:drive-internals

chrome/browser/ui/webui/chromeos/drive_internals_ui.cc

Index: chrome/browser/ui/webui/chromeos/drive_internals_ui.cc
diff --git a/chrome/browser/ui/webui/chromeos/drive_internals_ui.cc b/chrome/browser/ui/webui/chromeos/drive_internals_ui.cc
index c2149932478dd3b5284bdff89fa7eaac89da7450..d667a36cb5924ac062a16e3a3c91815f76ad5ad0 100644
--- a/chrome/browser/ui/webui/chromeos/drive_internals_ui.cc
+++ b/chrome/browser/ui/webui/chromeos/drive_internals_ui.cc
@@ -5,13 +5,17 @@
 #include "chrome/browser/ui/webui/chromeos/drive_internals_ui.h"
 
 #include "base/bind.h"
+#include "base/file_util.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/chromeos/gdata/gdata_auth_service.h"
+#include "chrome/browser/chromeos/gdata/gdata_cache.h"
 #include "chrome/browser/chromeos/gdata/gdata_documents_service.h"
 #include "chrome/browser/chromeos/gdata/gdata_system_service.h"
+#include "chrome/browser/chromeos/gdata/gdata_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/webui/chrome_web_ui_data_source.h"
 #include "chrome/common/url_constants.h"
+#include "content/public/browser/browser_thread.h"
 #include "content/public/browser/web_ui.h"
 #include "content/public/browser/web_ui_message_handler.h"
 #include "grit/browser_resources.h"
@@ -20,6 +24,59 @@ namespace chromeos {
 
 namespace {
 
+// Gets metadata of all files and directories in |root_path|
+// recursively. Stores the result as a list of dictionaries like:
+//
+// [{ path: 'GCache/v1/tmp/<resource_id>',
+//    size: 12345,
+//    is_directory: false,
+//    last_modified: '2005-08-09T09:57:00-08:00',
+//  },...]
+//
+// The list is sorted by the path.
+void GetGCacheContents(const FilePath& root_path,
+                       base::ListValue* gcache_contents) {
+  using file_util::FileEnumerator;
+  // Use this map to sort the result list by the path.
+  std::map<FilePath, DictionaryValue*> files;
+
+  const int options = (file_util::FileEnumerator::FILES |
+                       file_util::FileEnumerator::DIRECTORIES |
+                       file_util::FileEnumerator::SHOW_SYM_LINKS);
+  FileEnumerator enumerator(
+      root_path,
+      true,  // recursive
+      static_cast<FileEnumerator::FileType>(options));
+
+  for (FilePath current = enumerator.Next(); !current.empty();
+       current = enumerator.Next()) {
+    FileEnumerator::FindInfo find_info;
+    enumerator.GetFindInfo(&find_info);
+    int64 size = FileEnumerator::GetFilesize(find_info);
+    const bool is_directory = FileEnumerator::IsDirectory(find_info);
+    const bool is_symbolic_link = FileEnumerator::IsLink(find_info);
+    const base::Time last_modified =
+        FileEnumerator::GetLastModifiedTime(find_info);
+
+    base::DictionaryValue* entry = new base::DictionaryValue;
+    entry->SetString("path", current.value());
+    // Use double instead of integer for large files.
+    entry->SetDouble("size", size);
+    entry->SetBoolean("is_directory", is_directory);
+    entry->SetBoolean("is_symbolic_link", is_symbolic_link);
+    entry->SetString("last_modified",
+                     gdata::util::FormatTimeAsString(last_modified));
+
+    files[current] = entry;
+  }
+
+  // Convert |files| into |gcache_contents|.
+  for (std::map<FilePath, DictionaryValue*>::const_iterator
+           iter = files.begin(); iter != files.end(); ++iter) {
+    gcache_contents->Append(iter->second);
+  }
+}
+
 // Class to handle messages from chrome://drive-internals.
 class DriveInternalsWebUIHandler : public content::WebUIMessageHandler {
  public:
@@ -59,6 +116,23 @@ class DriveInternalsWebUIHandler : public content::WebUIMessageHandler {
     auth_status.SetBoolean("has-access-token",
                            documents_service->HasAccessToken());
     web_ui()->CallJavascriptFunction("UpdateAuthStatus", auth_status);
+
+    // Start updating the GCache contents section.
+    const FilePath root_path =
+        gdata::GDataCache::GetCacheRootPath(profile);
+    base::ListValue* gcache_contents = new ListValue;
+    content::BrowserThread::PostBlockingPoolTaskAndReply(
+        FROM_HERE,
+        base::Bind(&GetGCacheContents, root_path, gcache_contents),
+        base::Bind(&DriveInternalsWebUIHandler::OnGetGCacheContents,
+                   weak_ptr_factory_.GetWeakPtr(),
+                   base::Owned(gcache_contents)));
+  }
+
+  // Called when GetGCacheContents() is complete.
+  void OnGetGCacheContents(base::ListValue* gcache_contents) {
+    DCHECK(gcache_contents);
+    web_ui()->CallJavascriptFunction("UpdateGCacheContents", *gcache_contents);
   }
 
   base::WeakPtrFactory<DriveInternalsWebUIHandler> weak_ptr_factory_;
@@ -73,6 +147,7 @@ DriveInternalsUI::DriveInternalsUI(content::WebUI* web_ui)
 
   ChromeWebUIDataSource* source =
       new ChromeWebUIDataSource(chrome::kChromeUIDriveInternalsHost);
+  source->add_resource_path("drive_internals.css", IDR_DRIVE_INTERNALS_CSS);
   source->add_resource_path("drive_internals.js", IDR_DRIVE_INTERNALS_JS);
   source->set_default_resource(IDR_DRIVE_INTERNALS_HTML);