1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 #ifndef CHROME_BROWSER_SUPERVISED_USER_SUPERVISED_USER_DENYLIST_H_
6 #define CHROME_BROWSER_SUPERVISED_USER_SUPERVISED_USER_DENYLIST_H_
7 
8 #include <stddef.h>
9 
10 #include <memory>
11 #include <string>
12 #include <vector>
13 
14 #include "base/callback_forward.h"
15 #include "base/hash/sha1.h"
16 #include "base/macros.h"
17 #include "base/memory/weak_ptr.h"
18 
19 namespace base {
20 class FilePath;
21 }
22 
23 class GURL;
24 
25 // Compact list of (SHA1 hashes of) blocked hosts.
26 // Checking for URLs is thread-safe, loading is not.
27 class SupervisedUserDenylist {
28  public:
29   struct Hash {
HashHash30     Hash() {}
31     explicit Hash(const std::string& host);
32     bool operator<(const Hash& rhs) const;
33 
34     unsigned char data[base::kSHA1Length];
35   };
36 
37   SupervisedUserDenylist();
38   ~SupervisedUserDenylist();
39 
40   // Asynchronously read a denylist from the given file, replacing any previous
41   // entries. |done_callback| will be run after reading finishes (successfully
42   // or not), but not if the SupervisedUserDenylist is destroyed before that.
43   void ReadFromFile(const base::FilePath& path,
44                     const base::Closure& done_callback);
45 
46   bool HasURL(const GURL& url) const;
47 
48   size_t GetEntryCount() const;
49 
50  private:
51   void OnReadFromFileCompleted(const base::Closure& done_callback,
52                                std::unique_ptr<std::vector<Hash>> host_hashes);
53 
54   std::vector<Hash> host_hashes_;
55 
56   base::WeakPtrFactory<SupervisedUserDenylist> weak_ptr_factory_{this};
57 
58   DISALLOW_COPY_AND_ASSIGN(SupervisedUserDenylist);
59 };
60 
61 #endif  // CHROME_BROWSER_SUPERVISED_USER_SUPERVISED_USER_DENYLIST_H_
62