Further reduce the bad dependency of chrome/common on chrome/browser.

TEST=none
BUG=none
Review URL: http://codereview.chromium.org/656011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@39877 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 108 insertions, 0 deletions

diff --git a/chrome/common/extensions/extension_file_util.h b/chrome/common/extensions/extension_file_util.h
new file mode 100644
index 0000000..b711df0
--- /dev/null
+++ b/chrome/common/extensions/extension_file_util.h
@@ -0,0 +1,108 @@
+// Copyright (c) 2009 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.
+
+#ifndef CHROME_COMMON_EXTENSIONS_EXTENSION_FILE_UTIL_H_
+#define CHROME_COMMON_EXTENSIONS_EXTENSION_FILE_UTIL_H_
+
+#include <set>
+#include <string>
+
+#include "base/file_path.h"
+#include "chrome/common/extensions/extension.h"
+
+class ExtensionMessageBundle;
+
+// Utilties for manipulating the on-disk storage of extensions.
+namespace extension_file_util {
+
+// The name of the directory inside the profile that we store installed
+// extension in.
+extern const char kInstallDirectoryName[];
+
+// The name of the file that contains the current version of an installed
+// extension.
+extern const char kCurrentVersionFileName[];
+
+// Move source_dir to dest_dir (it will actually be named dest_dir, not inside
+// dest_dir). If the parent path doesn't exixt, create it. If something else is
+// already there, remove it.
+bool MoveDirSafely(const FilePath& source_dir, const FilePath& dest_dir);
+
+// Updates the Current Version file inside the installed extension.
+bool SetCurrentVersion(const FilePath& dest_dir,
+                       const std::string& version,
+                       std::string* error);
+
+// Reads the Current Version file.
+bool ReadCurrentVersion(const FilePath& dir, std::string* version_string);
+
+// Determine what type of install it is (new, upgrade, overinstall, downgrade)
+// given the current version and a newly installing version. |extensions_dir| is
+// the root directory containing all extensions in the user profile.
+// |extension_id| and |current_version_str| are the id and version of the
+// extension contained in |src_dir|, if any.
+//
+// Returns the full path to the destination version directory and the type of
+// install that was attempted.
+Extension::InstallType CompareToInstalledVersion(
+    const FilePath& extensions_dir,
+    const std::string& extension_id,
+    const std::string& current_version_str,
+    const std::string& new_version_str,
+    FilePath* version_dir);
+
+// Sanity check that the directory has the minimum files to be a working
+// extension.
+bool SanityCheckExtension(const FilePath& extension_root);
+
+// Installs an extension unpacked in |src_dir|.
+//
+// On failure, also returns an error message.
+//
+// NOTE: |src_dir| is not actually copied in the case of downgrades or
+// overinstall of previous verisons of the extension. In that case, the function
+// returns true and install_type is populated.
+bool InstallExtension(const FilePath& src_dir,
+                      const FilePath& version_dir,
+                      std::string* error);
+
+// Loads and validates an extension from the specified directory. Returns NULL
+// on failure, with a description of the error in |error|.
+Extension* LoadExtension(const FilePath& extension_root,
+                         bool require_key,
+                         std::string* error);
+
+// Returns true if the given extension object is valid and consistent.
+// Otherwise, a description of the error is returned in |error|.
+bool ValidateExtension(Extension* extension, std::string* error);
+
+// Uninstalls the extension |id| from the install directory |extensions_dir|.
+void UninstallExtension(const std::string& id, const FilePath& extensions_dir);
+
+// Clean up directories that aren't valid extensions from the install directory.
+void GarbageCollectExtensions(
+    const FilePath& extensions_dir,
+    const std::set<std::string>& installed_ids,
+    const std::map<std::string, std::string>& installed_versions);
+
+// Loads extension message catalogs and returns message bundle.
+// Returns NULL on error, or if extension is not localized.
+ExtensionMessageBundle* LoadExtensionMessageBundle(
+    const FilePath& extension_path,
+    const std::string& default_locale,
+    std::string* error);
+
+// We need to reserve the namespace of entries that start with "_" for future
+// use by Chrome.
+// If any files or directories are found using "_" prefix and are not on
+// reserved list we return false, and set error message.
+bool CheckForIllegalFilenames(const FilePath& extension_path,
+                              std::string* error);
+
+// Get a relative file path from a chrome-extension:// URL.
+FilePath ExtensionURLToRelativeFilePath(const GURL& url);
+
+}  // extension_file_util
+
+#endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_FILE_UTIL_H_