xbmc/filesystem/XbtManager.cpp

   1 /*
   2  *  Copyright (C) 2015-2018 Team Kodi
   3  *  This file is part of Kodi - https://kodi.tv
   4  *
   5  *  SPDX-License-Identifier: GPL-2.0-or-later
   6  *  See LICENSES/README.md for more information.
   7  */
   8
   9 #include "XbtManager.h"
  10
  11 #include "URL.h"
  12 #include "guilib/XBTF.h"
  13 #include "guilib/XBTFReader.h"
  14
  15 #include <utility>
  16
  17 namespace XFILE
  18 {
  19
  20 CXbtManager::CXbtManager() = default;
  21
  22 CXbtManager::~CXbtManager() = default;
  23
  24 CXbtManager& CXbtManager::GetInstance()
  25 {
  26   static CXbtManager xbtManager;
  27   return xbtManager;
  28 }
  29
  30 bool CXbtManager::HasFiles(const CURL& path) const
  31 {
  32   return ProcessFile(path) != m_readers.end();
  33 }
  34
  35 bool CXbtManager::GetFiles(const CURL& path, std::vector<CXBTFFile>& files) const
  36 {
  37   const auto& reader = ProcessFile(path);
  38   if (reader == m_readers.end())
  39     return false;
  40
  41   files = reader->second.reader->GetFiles();
  42   return true;
  43 }
  44
  45 bool CXbtManager::GetReader(const CURL& path, CXBTFReaderPtr& reader) const
  46 {
  47   const auto& it = ProcessFile(path);
  48   if (it == m_readers.end())
  49     return false;
  50
  51   reader = it->second.reader;
  52   return true;
  53 }
  54
  55 void CXbtManager::Release(const CURL& path)
  56 {
  57   const auto& it = GetReader(path);
  58   if (it == m_readers.end())
  59     return;
  60
  61   RemoveReader(it);
  62 }
  63
  64 CXbtManager::XBTFReaders::iterator CXbtManager::GetReader(const CURL& path) const
  65 {
  66   return GetReader(NormalizePath(path));
  67 }
  68
  69 CXbtManager::XBTFReaders::iterator CXbtManager::GetReader(const std::string& path) const
  70 {
  71   if (path.empty())
  72     return m_readers.end();
  73
  74   return m_readers.find(path);
  75 }
  76
  77 void CXbtManager::RemoveReader(XBTFReaders::iterator readerIterator) const
  78 {
  79   if (readerIterator == m_readers.end())
  80     return;
  81
  82   // close the reader
  83   readerIterator->second.reader->Close();
  84
  85   // and remove it from the map
  86   m_readers.erase(readerIterator);
  87 }
  88
  89 CXbtManager::XBTFReaders::const_iterator CXbtManager::ProcessFile(const CURL& path) const
  90 {
  91   std::string filePath = NormalizePath(path);
  92
  93   // check if the file is known
  94   auto it = GetReader(filePath);
  95   if (it != m_readers.end())
  96   {
  97     // check if the XBT file has been modified
  98     if (it->second.reader->GetLastModificationTimestamp() <= it->second.lastModification)
  99       return it;
 100
 101     // the XBT file has been modified so close and remove it from the cache
 102     // it will be re-opened by the following logic
 103     RemoveReader(it);
 104   }
 105
 106   // try to read the file
 107   CXBTFReaderPtr reader(new CXBTFReader());
 108   if (!reader->Open(filePath))
 109     return m_readers.end();
 110
 111   XBTFReader xbtfReader = {
 112     reader,
 113     reader->GetLastModificationTimestamp()
 114   };
 115   std::pair<XBTFReaders::iterator, bool> result = m_readers.insert(std::make_pair(filePath, xbtfReader));
 116   return result.first;
 117 }
 118
 119 std::string CXbtManager::NormalizePath(const CURL& path)
 120 {
 121   if (path.IsProtocol("xbt"))
 122     return path.GetHostName();
 123
 124   return path.Get();
 125 }
 126
 127 }