[StringUtils] Add Trim, ToMap methods

Author: CastagnaIT

src/utils/StringUtils.cpp

@@ -11,6 +11,7 @@
 #include "kodi/tools/StringUtils.h"
 
 #include <algorithm>
+#include <cctype> // isspace
 #include <charconv> // from_chars
 #include <cstdio>
 #include <cstring> // strstr
@@ -249,3 +250,56 @@ bool UTILS::STRING::GetLine(std::stringstream& ss, std::string& line)
 
   return true;
 }
+
+std::map<std::string_view, std::string_view> UTILS::STRING::ToMap(std::string_view str,
+                                                                  const char delimiter,
+                                                                  const char separator)
+{
+  std::map<std::string_view, std::string_view> mapped;
+
+  size_t keyPos = 0;
+  size_t keyEnd;
+  size_t valPos;
+  size_t valEnd;
+
+  while ((keyEnd = str.find(delimiter, keyPos)) != std::string::npos)
+  {
+    valPos = str.find_first_not_of(delimiter, keyEnd);
+    if (valPos == std::string::npos)
+      break;
+
+    valEnd = str.find(separator, valPos);
+    mapped.emplace(str.substr(keyPos, keyEnd - keyPos), str.substr(valPos, valEnd - valPos));
+
+    keyPos = valEnd;
+    if (keyPos != std::string::npos)
+      ++keyPos;
+  }
+
+  return mapped;
+}
+
+std::string_view UTILS::STRING::Trim(std::string_view str)
+{
+  auto left = str.begin();
+  while (left != str.end())
+  {
+    if (!std::isspace(*left))
+      break;
+
+    left++;
+  }
+
+  if (left == str.end())
+    return {};
+
+  auto right = str.end() - 1;
+  while (right > left && std::isspace(*right))
+  {
+    right--;
+  }
+
+  //! @todo: when we will switch to C++20 replace return code with:
+  //!   return {left, std::distance(left, right) + 1};
+  return str.substr(left - str.begin(), std::distance(left, right) + 1);
+}

src/utils/StringUtils.h

@@ -9,6 +9,7 @@
 #pragma once
 
 #include <cstdint>
+#include <map>
 #include <set>
 #include <string>
 #include <string_view>
@@ -157,5 +158,22 @@ bool CompareNoCase(std::string_view str1, std::string_view str2);
  */
 bool GetLine(std::stringstream& ss, std::string& line);
 
+/*!
+ * \brief Convert a string to a map.
+ * \param str The string to convert
+ * \param delimiter The character separating the key from the value
+ * \param separator The character separating more key/value pairs
+ * \return The mapped string.
+ */
+std::map<std::string_view, std::string_view> ToMap(std::string_view str,
+                                                   const char delimiter,
+                                                   const char separator);
+
+/*!
+ * \brief Trim a string with remove of not wanted spaces at begin and end of string.
+ * \return The changed string.
+ */
+std::string_view Trim(std::string_view str);
+
 } // namespace STRING
 } // namespace UTILS