1 files changed, 244 insertions, 0 deletions
diff --git a/xbmc/utils/ExecString.cpp b/xbmc/utils/ExecString.cpp
new file mode 100644
index 0000000..37650e0
--- /dev/null
+++ b/xbmc/utils/ExecString.cpp
@@ -0,0 +1,244 @@
+/*
+ *  Copyright (C) 2022 Team Kodi
+ *  This file is part of Kodi - https://kodi.tv
+ *
+ *  SPDX-License-Identifier: GPL-2.0-or-later
+ *  See LICENSES/README.md for more information.
+ */
+
+#include "ExecString.h"
+
+#include "FileItem.h"
+#include "ServiceBroker.h"
+#include "URL.h"
+#include "music/tags/MusicInfoTag.h"
+#include "settings/AdvancedSettings.h"
+#include "settings/SettingsComponent.h"
+#include "utils/StringUtils.h"
+#include "utils/Variant.h"
+#include "utils/log.h"
+#include "video/VideoInfoTag.h"
+
+CExecString::CExecString(const std::string& execString)
+{
+  m_valid = Parse(execString);
+}
+
+CExecString::CExecString(const std::string& function, const std::vector<std::string>& params)
+  : m_function(function), m_params(params)
+{
+  m_valid = !m_function.empty();
+
+  if (m_valid)
+    SetExecString();
+}
+
+CExecString::CExecString(const CFileItem& item, const std::string& contextWindow)
+{
+  m_valid = Parse(item, contextWindow);
+}
+
+namespace
+{
+void SplitParams(const std::string& paramString, std::vector<std::string>& parameters)
+{
+  bool inQuotes = false;
+  bool lastEscaped = false; // only every second character can be escaped
+  int inFunction = 0;
+  size_t whiteSpacePos = 0;
+  std::string parameter;
+  parameters.clear();
+  for (size_t pos = 0; pos < paramString.size(); pos++)
+  {
+    char ch = paramString[pos];
+    bool escaped = (pos > 0 && paramString[pos - 1] == '\\' && !lastEscaped);
+    lastEscaped = escaped;
+    if (inQuotes)
+    { // if we're in a quote, we accept everything until the closing quote
+      if (ch == '"' && !escaped)
+      { // finished a quote - no need to add the end quote to our string
+        inQuotes = false;
+      }
+    }
+    else
+    { // not in a quote, so check if we should be starting one
+      if (ch == '"' && !escaped)
+      { // start of quote - no need to add the quote to our string
+        inQuotes = true;
+      }
+      if (inFunction && ch == ')')
+      { // end of a function
+        inFunction--;
+      }
+      if (ch == '(')
+      { // start of function
+        inFunction++;
+      }
+      if (!inFunction && ch == ',')
+      { // not in a function, so a comma signifies the end of this parameter
+        if (whiteSpacePos)
+          parameter = parameter.substr(0, whiteSpacePos);
+        // trim off start and end quotes
+        if (parameter.length() > 1 && parameter[0] == '"' &&
+            parameter[parameter.length() - 1] == '"')
+          parameter = parameter.substr(1, parameter.length() - 2);
+        else if (parameter.length() > 3 && parameter[parameter.length() - 1] == '"')
+        {
+          // check name="value" style param.
+          size_t quotaPos = parameter.find('"');
+          if (quotaPos > 1 && quotaPos < parameter.length() - 1 && parameter[quotaPos - 1] == '=')
+          {
+            parameter.erase(parameter.length() - 1);
+            parameter.erase(quotaPos);
+          }
+        }
+        parameters.push_back(parameter);
+        parameter.clear();
+        whiteSpacePos = 0;
+        continue;
+      }
+    }
+    if ((ch == '"' || ch == '\\') && escaped)
+    { // escaped quote or backslash
+      parameter[parameter.size() - 1] = ch;
+      continue;
+    }
+    // whitespace handling - we skip any whitespace at the left or right of an unquoted parameter
+    if (ch == ' ' && !inQuotes)
+    {
+      if (parameter.empty()) // skip whitespace on left
+        continue;
+      if (!whiteSpacePos) // make a note of where whitespace starts on the right
+        whiteSpacePos = parameter.size();
+    }
+    else
+      whiteSpacePos = 0;
+    parameter += ch;
+  }
+  if (inFunction || inQuotes)
+    CLog::Log(LOGWARNING, "{}({}) - end of string while searching for ) or \"", __FUNCTION__,
+              paramString);
+  if (whiteSpacePos)
+    parameter.erase(whiteSpacePos);
+  // trim off start and end quotes
+  if (parameter.size() > 1 && parameter[0] == '"' && parameter[parameter.size() - 1] == '"')
+    parameter = parameter.substr(1, parameter.size() - 2);
+  else if (parameter.size() > 3 && parameter[parameter.size() - 1] == '"')
+  {
+    // check name="value" style param.
+    size_t quotaPos = parameter.find('"');
+    if (quotaPos > 1 && quotaPos < parameter.length() - 1 && parameter[quotaPos - 1] == '=')
+    {
+      parameter.erase(parameter.length() - 1);
+      parameter.erase(quotaPos);
+    }
+  }
+  if (!parameter.empty() || parameters.size())
+    parameters.push_back(parameter);
+}
+
+void SplitExecFunction(const std::string& execString,
+                       std::string& function,
+                       std::vector<std::string>& parameters)
+{
+  std::string paramString;
+
+  size_t iPos = execString.find('(');
+  size_t iPos2 = execString.rfind(')');
+  if (iPos != std::string::npos && iPos2 != std::string::npos)
+  {
+    paramString = execString.substr(iPos + 1, iPos2 - iPos - 1);
+    function = execString.substr(0, iPos);
+  }
+  else
+    function = execString;
+
+  // remove any whitespace, and the standard prefix (if it exists)
+  StringUtils::Trim(function);
+
+  SplitParams(paramString, parameters);
+}
+} // namespace
+
+bool CExecString::Parse(const std::string& execString)
+{
+  m_execString = execString;
+  SplitExecFunction(m_execString, m_function, m_params);
+
+  // Keep original function case in execstring, lowercase it in function
+  StringUtils::ToLower(m_function);
+  return true;
+}
+
+bool CExecString::Parse(const CFileItem& item, const std::string& contextWindow)
+{
+  if (item.IsFavourite())
+  {
+    const CURL url(item.GetPath());
+    Parse(CURL::Decode(url.GetHostName()));
+  }
+  else if (item.m_bIsFolder &&
+           (CServiceBroker::GetSettingsComponent()->GetAdvancedSettings()->m_playlistAsFolders ||
+            !(item.IsSmartPlayList() || item.IsPlayList())))
+  {
+    if (!contextWindow.empty())
+      Build("ActivateWindow", {contextWindow, StringUtils::Paramify(item.GetPath()), "return"});
+  }
+  else if (item.IsScript() && item.GetPath().size() > 9) // script://<foo>
+    Build("RunScript", {StringUtils::Paramify(item.GetPath().substr(9))});
+  else if (item.IsAddonsPath() && item.GetPath().size() > 9) // addons://<foo>
+  {
+    const CURL url(item.GetPath());
+    if (url.GetHostName() == "install")
+      Build("InstallFromZip", {});
+    else if (url.GetHostName() == "check_for_updates")
+      Build("UpdateAddonRepos", {"showProgress"});
+    else
+      Build("RunAddon", {StringUtils::Paramify(url.GetFileName())});
+  }
+  else if (item.IsAndroidApp() && item.GetPath().size() > 26) // androidapp://sources/apps/<foo>
+    Build("StartAndroidActivity", {StringUtils::Paramify(item.GetPath().substr(26))});
+  else // assume a media file
+  {
+    if (item.IsVideoDb() && item.HasVideoInfoTag())
+      BuildPlayMedia(item, StringUtils::Paramify(item.GetVideoInfoTag()->m_strFileNameAndPath));
+    else if (item.IsMusicDb() && item.HasMusicInfoTag())
+      BuildPlayMedia(item, StringUtils::Paramify(item.GetMusicInfoTag()->GetURL()));
+    else if (item.IsPicture())
+      Build("ShowPicture", {StringUtils::Paramify(item.GetPath())});
+    else
+    {
+      // Everything else will be treated as PlayMedia for item's path
+      BuildPlayMedia(item, StringUtils::Paramify(item.GetPath()));
+    }
+  }
+  return true;
+}
+
+void CExecString::Build(const std::string& function, const std::vector<std::string>& params)
+{
+  m_function = function;
+  m_params = params;
+  SetExecString();
+}
+
+void CExecString::BuildPlayMedia(const CFileItem& item, const std::string& target)
+{
+  std::vector<std::string> params{target};
+
+  if (item.HasProperty("playlist_type_hint"))
+    params.emplace_back("playlist_type_hint=" + item.GetProperty("playlist_type_hint").asString());
+
+  Build("PlayMedia", params);
+}
+
+void CExecString::SetExecString()
+{
+  if (m_params.empty())
+    m_execString = m_function;
+  else
+    m_execString = StringUtils::Format("{}({})", m_function, StringUtils::Join(m_params, ","));
+
+  // Keep original function case in execstring, lowercase it in function
+  StringUtils::ToLower(m_function);
+}