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#include "sql_complete.h"
#include <yql/essentials/sql/v1/complete/text/word.h>
#include <yql/essentials/sql/v1/complete/name/static/name_service.h>
#include <yql/essentials/sql/v1/complete/syntax/local.h>
#include <yql/essentials/sql/v1/complete/syntax/format.h>
#include <util/generic/algorithm.h>
#include <util/charset/utf8.h>
namespace NSQLComplete {
class TSqlCompletionEngine: public ISqlCompletionEngine {
public:
explicit TSqlCompletionEngine(
TLexerSupplier lexer,
INameService::TPtr names,
ISqlCompletionEngine::TConfiguration configuration)
: Configuration(std::move(configuration))
, SyntaxAnalysis(MakeLocalSyntaxAnalysis(lexer))
, Names(std::move(names))
{
}
TCompletion Complete(TCompletionInput input) {
if (
input.CursorPosition < input.Text.length() &&
IsUTF8ContinuationByte(input.Text.at(input.CursorPosition)) ||
input.Text.length() < input.CursorPosition) {
ythrow yexception()
<< "invalid cursor position " << input.CursorPosition
<< " for input size " << input.Text.size();
}
TLocalSyntaxContext context = SyntaxAnalysis->Analyze(input);
TStringBuf prefix = input.Text.Head(input.CursorPosition);
TCompletedToken completedToken = GetCompletedToken(prefix);
return {
.CompletedToken = std::move(completedToken),
.Candidates = GetCanidates(std::move(context), completedToken),
};
}
private:
TCompletedToken GetCompletedToken(TStringBuf prefix) {
return {
.Content = LastWord(prefix),
.SourcePosition = LastWordIndex(prefix),
};
}
TVector<TCandidate> GetCanidates(TLocalSyntaxContext context, const TCompletedToken& prefix) {
TNameRequest request = {
.Prefix = TString(prefix.Content),
.Limit = Configuration.Limit,
};
for (const auto& [first, _] : context.Keywords) {
request.Keywords.emplace_back(first);
}
if (context.Pragma) {
TPragmaName::TConstraints constraints;
constraints.Namespace = context.Pragma->Namespace;
request.Constraints.Pragma = std::move(constraints);
}
if (context.IsTypeName) {
request.Constraints.Type = TTypeName::TConstraints();
}
if (context.Function) {
TFunctionName::TConstraints constraints;
constraints.Namespace = context.Function->Namespace;
request.Constraints.Function = std::move(constraints);
}
if (context.Hint) {
THintName::TConstraints constraints;
constraints.Statement = context.Hint->StatementKind;
request.Constraints.Hint = std::move(constraints);
}
if (request.IsEmpty()) {
return {};
}
// User should prepare a robust INameService
TNameResponse response = Names->Lookup(std::move(request)).ExtractValueSync();
return Convert(std::move(response.RankedNames), std::move(context.Keywords));
}
TVector<TCandidate> Convert(TVector<TGenericName> names, TLocalSyntaxContext::TKeywords keywords) {
TVector<TCandidate> candidates;
for (auto& name : names) {
candidates.emplace_back(std::visit([&](auto&& name) -> TCandidate {
using T = std::decay_t<decltype(name)>;
if constexpr (std::is_base_of_v<TKeyword, T>) {
TVector<TString>& seq = keywords[name.Content];
seq.insert(std::begin(seq), name.Content);
return {ECandidateKind::Keyword, FormatKeywords(seq)};
}
if constexpr (std::is_base_of_v<TPragmaName, T>) {
return {ECandidateKind::PragmaName, std::move(name.Indentifier)};
}
if constexpr (std::is_base_of_v<TTypeName, T>) {
return {ECandidateKind::TypeName, std::move(name.Indentifier)};
}
if constexpr (std::is_base_of_v<TFunctionName, T>) {
name.Indentifier += "(";
return {ECandidateKind::FunctionName, std::move(name.Indentifier)};
}
if constexpr (std::is_base_of_v<THintName, T>) {
return {ECandidateKind::HintName, std::move(name.Indentifier)};
}
}, std::move(name)));
}
return candidates;
}
TConfiguration Configuration;
ILocalSyntaxAnalysis::TPtr SyntaxAnalysis;
INameService::TPtr Names;
};
ISqlCompletionEngine::TPtr MakeSqlCompletionEngine(
TLexerSupplier lexer,
INameService::TPtr names,
ISqlCompletionEngine::TConfiguration configuration) {
return ISqlCompletionEngine::TPtr(
new TSqlCompletionEngine(lexer, std::move(names), std::move(configuration)));
}
} // namespace NSQLComplete
template <>
void Out<NSQLComplete::ECandidateKind>(IOutputStream& out, NSQLComplete::ECandidateKind kind) {
switch (kind) {
case NSQLComplete::ECandidateKind::Keyword:
out << "Keyword";
break;
case NSQLComplete::ECandidateKind::PragmaName:
out << "PragmaName";
break;
case NSQLComplete::ECandidateKind::TypeName:
out << "TypeName";
break;
case NSQLComplete::ECandidateKind::FunctionName:
out << "FunctionName";
break;
case NSQLComplete::ECandidateKind::HintName:
out << "HintName";
break;
}
}
template <>
void Out<NSQLComplete::TCandidate>(IOutputStream& out, const NSQLComplete::TCandidate& candidate) {
out << "{" << candidate.Kind << ", \"" << candidate.Content << "\"}";
}
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