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#include "format.h"
#include "grammar.h"
#include <yql/essentials/sql/v1/complete/antlr4/vocabulary.h>
#include <util/generic/hash_set.h>
#include <util/charset/utf8.h>
namespace NSQLComplete {
namespace {
const THashSet<std::string> Keywords = [] {
const auto& grammar = GetSqlGrammar();
const auto& vocabulary = grammar.GetVocabulary();
THashSet<std::string> keywords;
for (auto& token : grammar.GetKeywordTokens()) {
keywords.emplace(Display(vocabulary, token));
}
return keywords;
}();
} // namespace
TString FormatKeywords(const TVector<TString>& seq) {
if (seq.empty()) {
return "";
}
TString text = seq[0];
for (size_t i = 1; i < seq.size(); ++i) {
const auto& token = seq[i];
if (Keywords.contains(token)) {
text += " ";
}
text += token;
}
return text;
}
bool IsPlain(TStringBuf content) {
return GetSqlGrammar().IsPlainIdentifier(content);
}
bool IsQuoted(TStringBuf content) {
return 2 <= content.size() && content.front() == '`' && content.back() == '`';
}
TString Quoted(TString content) {
content.prepend('`');
content.append('`');
return content;
}
TStringBuf Unquoted(TStringBuf content) {
Y_ENSURE(IsQuoted(content));
return content.SubStr(1, content.size() - 2);
}
bool IsBinding(TStringBuf content) {
return 1 <= content.size() && content.front() == '$';
}
TStringBuf Unbinded(TStringBuf content) {
Y_ENSURE(IsBinding(content));
return content.SubStr(1);
}
} // namespace NSQLComplete
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