Componentize HistoryDatabase

components/history/core/android/favicon_sql_handler.cc

-// Copyright (c) 2012 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/history/core/android/favicon_sql_handler.h"
-
-#include "base/logging.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/ref_counted_memory.h"
-#include "components/history/core/browser/thumbnail_database.h"
-
-using base::Time;
-
-namespace history {
-
-namespace {
-
-// The interesting columns of this handler.
-const HistoryAndBookmarkRow::ColumnID kInterestingColumns[] = {
-  HistoryAndBookmarkRow::FAVICON};
-
-}  // namespace
-
-FaviconSQLHandler::FaviconSQLHandler(ThumbnailDatabase* thumbnail_db)
-    : SQLHandler(kInterestingColumns, arraysize(kInterestingColumns)),
-      thumbnail_db_(thumbnail_db) {
-}
-
-FaviconSQLHandler::~FaviconSQLHandler() {
-}
-
-bool FaviconSQLHandler::Update(const HistoryAndBookmarkRow& row,
-                               const TableIDRows& ids_set) {
-  if (!row.favicon_valid())
-    return Delete(ids_set);
-
-  // If the image_data will be updated, it is not reasonable to find if the
-  // icon is already in database, just create a new favicon.
-  // TODO(pkotwicz): Pass in real pixel size.
-  favicon_base::FaviconID favicon_id = thumbnail_db_->AddFavicon(
-      GURL(), favicon_base::FAVICON, row.favicon(), Time::Now(), gfx::Size());
-
-  if (!favicon_id)
-    return false;
-
-  std::vector<favicon_base::FaviconID> favicon_ids;
-  for (TableIDRows::const_iterator i = ids_set.begin();
-       i != ids_set.end(); ++i) {
-    // Remove all icon mappings to favicons of type FAVICON.
-    std::vector<IconMapping> icon_mappings;
-    thumbnail_db_->GetIconMappingsForPageURL(
-        i->url, favicon_base::FAVICON, &icon_mappings);
-    for (std::vector<IconMapping>::const_iterator m = icon_mappings.begin();
-         m != icon_mappings.end(); ++m) {
-      if (!thumbnail_db_->DeleteIconMapping(m->mapping_id))
-        return false;
-
-      // Keep the old icon for deleting it later if possible.
-      favicon_ids.push_back(m->icon_id);
-    }
-    // Add the icon mapping.
-    if (!thumbnail_db_->AddIconMapping(i->url, favicon_id))
-      return false;
-  }
-  // As we update the favicon, Let's remove unused favicons if any.
-  if (!favicon_ids.empty() && !DeleteUnusedFavicon(favicon_ids))
-    return false;
-
-  return true;
-}
-
-bool FaviconSQLHandler::Delete(const TableIDRows& ids_set) {
-  std::vector<favicon_base::FaviconID> favicon_ids;
-  for (TableIDRows::const_iterator i = ids_set.begin();
-       i != ids_set.end(); ++i) {
-    // Since the URL was deleted, we delete all types of icon mappings.
-    std::vector<IconMapping> icon_mappings;
-    thumbnail_db_->GetIconMappingsForPageURL(i->url, &icon_mappings);
-    for (std::vector<IconMapping>::const_iterator m = icon_mappings.begin();
-         m != icon_mappings.end(); ++m) {
-      favicon_ids.push_back(m->icon_id);
-    }
-    if (!thumbnail_db_->DeleteIconMappings(i->url))
-      return false;
-  }
-
-  if (favicon_ids.empty())
-    return true;
-
-  if (!DeleteUnusedFavicon(favicon_ids))
-    return false;
-
-  return true;
-}
-
-bool FaviconSQLHandler::Insert(HistoryAndBookmarkRow* row) {
-  if (!row->is_value_set_explicitly(HistoryAndBookmarkRow::FAVICON) ||
-      !row->favicon_valid())
-    return true;
-
-  DCHECK(row->is_value_set_explicitly(HistoryAndBookmarkRow::URL));
-
-  // Is it a problem to give a empty URL?
-  // TODO(pkotwicz): Pass in real pixel size.
-  favicon_base::FaviconID id = thumbnail_db_->AddFavicon(
-      GURL(), favicon_base::FAVICON, row->favicon(), Time::Now(), gfx::Size());
-  if (!id)
-    return false;
-  return thumbnail_db_->AddIconMapping(row->url(), id);
-}
-
-bool FaviconSQLHandler::DeleteUnusedFavicon(
-    const std::vector<favicon_base::FaviconID>& ids) {
-  for (std::vector<favicon_base::FaviconID>::const_iterator i = ids.begin();
-       i != ids.end();
-       ++i) {
-    if (!thumbnail_db_->HasMappingFor(*i) && !thumbnail_db_->DeleteFavicon(*i))
-      return false;
-  }
-  return true;
-}
-
-}  // namespace history.