Organic Maps sources as of 02.04.2025 (fad26bbf22ac3da75e01e62aa01e5c8e11861005)

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search/suggest.cpp

@@ -0,0 +1,46 @@
+#include "search/suggest.hpp"
+
+#include "indexer/search_string_utils.hpp"
+
+#include <algorithm>
+#include <vector>
+
+namespace search
+{
+
+std::string GetSuggestion(std::string const & name, QueryString const & query)
+{
+  auto const nTokens = NormalizeAndTokenizeString(name);
+
+  bool prefixMatched = false;
+  bool fullPrefixMatched = false;
+
+  for (auto const & token : nTokens)
+  {
+    if (StartsWith(token, query.m_prefix))
+    {
+      prefixMatched = true;
+      fullPrefixMatched = token.size() == query.m_prefix.size();
+    }
+  }
+
+  // When |name| does not match prefix or when prefix equals to some
+  // token of the |name| (for example, when user entered "Moscow"
+  // without space at the end), we should not suggest anything.
+  if (!prefixMatched || fullPrefixMatched)
+    return {};
+
+  std::string suggest;
+  for (auto const & token : query.m_tokens)
+  {
+    /// @todo Process street shorts like: st, av, ne, w, ..
+    if (std::find(nTokens.begin(), nTokens.end(), token) == nTokens.end())
+    {
+      suggest += strings::ToUtf8(token);
+      suggest += ' ';
+    }
+  }
+
+  return suggest + name + ' ';
+}
+}  // namespace search