// Copyright (c) 2010 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.

// Defines common functionality used by the implementation of the Chrome
// Extensions Cookies API implemented in
// chrome/browser/extensions/extension_cookies_api.cc. This separate interface
// exposes pieces of the API implementation mainly for unit testing purposes.

#ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_COOKIES_HELPERS_H_
#define CHROME_BROWSER_EXTENSIONS_EXTENSION_COOKIES_HELPERS_H_
#pragma once

#include <string>

#include "net/base/cookie_monster.h"

class Browser;
class DictionaryValue;
class Extension;
class ListValue;
class Profile;

namespace extension_cookies_helpers {

// Returns either the original profile or the incognito profile, based on the
// given store ID.  Returns NULL if the profile doesn't exist or is not allowed
// (e.g. if incognito mode is not enabled for the extension).
Profile* ChooseProfileFromStoreId(const std::string& store_id,
                                  Profile* profile,
                                  bool include_incognito);

// Returns the store ID for a particular user profile.
const char* GetStoreIdFromProfile(Profile* profile);

// Constructs a Cookie object as defined by the cookies API. This function
// allocates a new DictionaryValue object; the caller is responsible for
// freeing it.
DictionaryValue* CreateCookieValue(
    const net::CookieMonster::CanonicalCookie& cookie,
    const std::string& store_id);

// Constructs a CookieStore object as defined by the cookies API. This function
// allocates a new DictionaryValue object; the caller is responsible for
// freeing it.
DictionaryValue* CreateCookieStoreValue(Profile* profile,
                                        ListValue* tab_ids);

// Retrieves all cookies from the given cookie store corresponding to the given
// URL. If the URL is empty, all cookies in the cookie store are retrieved.
// This can only be called on the IO thread.
net::CookieList GetCookieListFromStore(
    net::CookieStore* cookie_store, const GURL& url);

// Constructs a URL from a cookie's information for use in checking
// a cookie against the extension's host permissions. The Secure
// property of the cookie defines the URL scheme, and the cookie's
// domain becomes the URL host.
GURL GetURLFromCanonicalCookie(
    const net::CookieMonster::CanonicalCookie& cookie);

// Looks through all cookies in the given cookie store, and appends to the
// match list all the cookies that both match the given URL and cookie details
// and are allowed by extension host permissions.
void AppendMatchingCookiesToList(
    const net::CookieList& all_cookies,
    const std::string& store_id,
    const GURL& url, const DictionaryValue* details,
    const Extension* extension,
    ListValue* match_list);

// Appends the IDs of all tabs belonging to the given browser to the
// given list.
void AppendToTabIdList(Browser* browser, ListValue* tab_ids);

// A class representing the cookie filter parameters passed into
// cookies.getAll().
// This class is essentially a convenience wrapper for the details dictionary
// passed into the cookies.getAll() API by the user. If the dictionary contains
// no filter parameters, the MatchFilter will always trivially
// match all cookies.
class MatchFilter {
 public:
  // Takes the details dictionary argument given by the user as input.
  // This class does not take ownership of the lifetime of the DictionaryValue
  // object.
  explicit MatchFilter(const DictionaryValue* details);

  // Returns true if the given cookie matches the properties in the match
  // filter.
  bool MatchesCookie(const net::CookieMonster::CanonicalCookie& cookie);

 private:
  // Returns true if the details dictionary contains a string with the given
  // key and value. Also returns true if the dictionary doesn't contain the
  // given key at all (trival match).
  bool MatchesString(const char* key, const std::string& value);

  // Returns true if the details dictionary contains a boolean with the given
  // key and value. Also returns true if the dictionary doesn't contain the
  // given key at all (trival match).
  bool MatchesBoolean(const char* key, bool value);

  // Returns true if the given cookie domain string matches the filter's
  // domain. Any cookie domain which is equal to or is a subdomain of the
  // filter's domain will be matched; leading '.' characters indicating
  // host-only domains have no meaning in the match filter domain (for
  // instance, a match filter domain of 'foo.bar.com' will be treated the same
  // as '.foo.bar.com', and both will match cookies with domain values of
  // 'foo.bar.com', '.foo.bar.com', and 'baz.foo.bar.com'.
  bool MatchesDomain(const std::string& domain);

  const DictionaryValue* details_;
};

}  // namespace extension_cookies_helpers

#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_COOKIES_HELPERS_H_