BookmarkClient can add extra nodes to BookmarkModel.

components/bookmarks/browser/managed_bookmarks_tracker.cc

Index: components/bookmarks/browser/managed_bookmarks_tracker.cc
diff --git a/components/bookmarks/browser/managed_bookmarks_tracker.cc b/components/bookmarks/browser/managed_bookmarks_tracker.cc
new file mode 100644
index 0000000000000000000000000000000000000000..27e0170d4775462e4dedce9910a6b310ae96cf14
--- /dev/null
+++ b/components/bookmarks/browser/managed_bookmarks_tracker.cc
@@ -0,0 +1,170 @@
+// Copyright 2014 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 "components/bookmarks/browser/managed_bookmarks_tracker.h"
+
+#include <string>
+
+#include "base/bind.h"
+#include "base/bind_helpers.h"
+#include "base/prefs/pref_service.h"
+#include "base/strings/utf_string_conversions.h"
+#include "base/values.h"
+#include "components/bookmarks/browser/bookmark_model.h"
+#include "components/bookmarks/browser/bookmark_node.h"
+#include "components/bookmarks/common/bookmark_pref_names.h"
+#include "grit/components_strings.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "url/gurl.h"
+
+const char ManagedBookmarksTracker::kName[] = "name";
+const char ManagedBookmarksTracker::kUrl[] = "url";
+const char ManagedBookmarksTracker::kChildren[] = "children";
+
+ManagedBookmarksTracker::ManagedBookmarksTracker(BookmarkModel* model,
+                                                 PrefService* prefs)
+    : model_(model), prefs_(prefs) {}
+
+ManagedBookmarksTracker::~ManagedBookmarksTracker() {}
+
+scoped_ptr<base::ListValue>
+ManagedBookmarksTracker::GetInitialManagedBookmarks() {
+  const base::ListValue* list = prefs_->GetList(prefs::kManagedBookmarks);
+  return make_scoped_ptr(list->DeepCopy());
+}
+
+// static
+int64 ManagedBookmarksTracker::LoadInitial(BookmarkNode* folder,
+                                           const base::ListValue* list,
+                                           int64 next_node_id) {
+  for (size_t i = 0; i < list->GetSize(); ++i) {
+    // Extract the data for the next bookmark from the |list|.
+    base::string16 title;
+    GURL url;
+    const base::ListValue* children = NULL;
+    if (!LoadBookmark(list, i, &title, &url, &children))
+      continue;
+
+    BookmarkNode* child = new BookmarkNode(next_node_id++, url);
+    child->SetTitle(title);
+    folder->Add(child, folder->child_count());
+    if (children) {
+      child->set_type(BookmarkNode::FOLDER);
+      child->set_date_folder_modified(base::Time::Now());
+      next_node_id = LoadInitial(child, children, next_node_id);
+    } else {
+      child->set_type(BookmarkNode::URL);
+      child->set_date_added(base::Time::Now());
+    }
+  }
+
+  return next_node_id;
+}
+
+void ManagedBookmarksTracker::Init() {
+  registrar_.Init(prefs_);
+  registrar_.Add(prefs::kManagedBookmarks,
+                 base::Bind(&ManagedBookmarksTracker::ReloadManagedBookmarks,
+                            base::Unretained(this)));
+  // Reload now just in case something changed since the initial load started.
+  ReloadManagedBookmarks();
+}
+
+void ManagedBookmarksTracker::ReloadManagedBookmarks() {
+  // Update the managed bookmarks folder title, in case the user just signed
+  // into or out of a managed account.
+  base::string16 title;
+  std::string domain = model_->client()->GetManagedBookmarksDomain();
+  if (domain.empty()) {
+    title =
+        l10n_util::GetStringUTF16(IDS_BOOKMARK_BAR_MANAGED_FOLDER_DEFAULT_NAME);
+  } else {
+    title = l10n_util::GetStringFUTF16(
+        IDS_BOOKMARK_BAR_MANAGED_FOLDER_DOMAIN_NAME, base::UTF8ToUTF16(domain));
+  }
+  const BookmarkNode* managed_node = model_->managed_node();
+  model_->SetTitle(managed_node, title);
+
+  // Recursively update all the managed bookmarks and folders.
+  const base::ListValue* list = prefs_->GetList(prefs::kManagedBookmarks);
+  UpdateBookmarks(managed_node, list);
+
+  // The managed bookmarks folder isn't visible when that policy isn't present.
+  model_->SetPermanentNodeVisible(BookmarkNode::MANAGED,
+                                  !managed_node->empty());
+}
+
+void ManagedBookmarksTracker::UpdateBookmarks(const BookmarkNode* folder,
+                                              const base::ListValue* list) {
+  int folder_i = 0;
+  for (size_t i = 0; i < list->GetSize(); ++i) {
+    // Extract the data for the next bookmark from the |list|.
+    base::string16 title;
+    GURL url;
+    const base::ListValue* children = NULL;
+    if (!LoadBookmark(list, i, &title, &url, &children)) {
+      // Skip this bookmark from |list| but don't advance |folder_i|.
+      continue;
+    }
+
+    // Look for a bookmark at |folder_i| or ahead that matches the current
+    // bookmark from the pref.
+    const BookmarkNode* existing = NULL;
+    for (int k = folder_i; k < folder->child_count(); ++k) {
+      const BookmarkNode* node = folder->GetChild(k);
+      if (node->GetTitle() == title &&
+          ((children && node->is_folder()) ||
+           (!children && node->url() == url))) {
+        existing = node;
+        break;
+      }
+    }
+
+    if (existing) {
+      // Reuse the existing node. The Move() is a nop if |existing| is already
+      // at |folder_i|.
+      model_->Move(existing, folder, folder_i);
+      if (children)
+        UpdateBookmarks(existing, children);
+    } else {
+      // Create a new node for this bookmark now.
+      if (children) {
+        const BookmarkNode* sub = model_->AddFolder(folder, folder_i, title);
+        UpdateBookmarks(sub, children);
+      } else {
+        model_->AddURL(folder, folder_i, title, url);
+      }
+    }
+
+    // The |folder_i| index of |folder| has been updated, so advance it.
+    ++folder_i;
+  }
+
+  // Remove any extra children of |folder| that haven't been reused.
+  while (folder->child_count() != folder_i)
+    model_->Remove(folder, folder_i);
+}
+
+// static
+bool ManagedBookmarksTracker::LoadBookmark(const base::ListValue* list,
+                                           size_t index,
+                                           base::string16* title,
+                                           GURL* url,
+                                           const base::ListValue** children) {
+  std::string spec;
+  *url = GURL();
+  *children = NULL;
+  const base::DictionaryValue* dict = NULL;
+  if (!list->GetDictionary(index, &dict) ||
+      !dict->GetString(kName, title) ||
+      (!dict->GetString(kUrl, &spec) &&
+       !dict->GetList(kChildren, children))) {
+    // Should never happen after policy validation.
+    NOTREACHED();
+    return false;
+  }
+  if (!*children)
+    *url = GURL(spec);
+  return true;
+}