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package org.zwobble.mammoth.internal.results;
import org.zwobble.mammoth.Result;
import org.zwobble.mammoth.internal.documents.Style;
import java.util.List;
import java.util.Optional;
import java.util.Set;
import java.util.function.BiFunction;
import java.util.function.Function;
import static org.zwobble.mammoth.internal.util.Iterables.lazyConcat;
import static org.zwobble.mammoth.internal.util.Iterables.lazyFlatMap;
import static org.zwobble.mammoth.internal.util.Lists.eagerMap;
import static org.zwobble.mammoth.internal.util.Lists.list;
import static org.zwobble.mammoth.internal.util.Sets.toSet;
public class InternalResult<T> {
public static <T, R> InternalResult<List<R>> flatMap(Iterable<T> iterable, Function<T, InternalResult<R>> function) {
List<InternalResult<R>> results = eagerMap(iterable, function);
return new InternalResult<>(
eagerMap(results, result -> result.value),
lazyFlatMap(results, result -> result.warnings));
}
public static <T1, T2, R> InternalResult<R> flatMap(
InternalResult<T1> first,
InternalResult<T2> second,
BiFunction<T1, T2, InternalResult<R>> function)
{
InternalResult<R> intermediateResult = function.apply(first.value, second.value);
return new InternalResult<>(
intermediateResult.value,
lazyConcat(lazyConcat(first.warnings, second.warnings), intermediateResult.warnings));
}
public static <T1, T2, R> InternalResult<R> map(
InternalResult<T1> first,
InternalResult<T2> second,
BiFunction<T1, T2, R> function)
{
return new InternalResult<>(
function.apply(first.value, second.value),
lazyConcat(first.warnings, second.warnings));
}
public static InternalResult<Optional<Style>> empty() {
return new InternalResult<>(Optional.empty(), list());
}
public static <T> InternalResult<T> success(T value) {
return new InternalResult<>(value, list());
}
private final T value;
private final Iterable<String> warnings;
public InternalResult(T value, Iterable<String> warnings) {
this.value = value;
this.warnings = warnings;
}
public T getValue() {
return value;
}
public Iterable<String> getWarnings() {
return warnings;
}
public <R> InternalResult<R> map(Function<T, R> function) {
return new InternalResult<>(function.apply(value), warnings);
}
public <R> InternalResult<R> flatMap(Function<T, InternalResult<R>> function) {
InternalResult<R> intermediateResult = function.apply(value);
return new InternalResult<>(
intermediateResult.value,
lazyConcat(warnings, intermediateResult.warnings));
}
public Result<T> toResult() {
Set<String> warnings = toSet(this.warnings);
return new Result<T>() {
@Override
public T getValue() {
return value;
}
@Override
public Set<String> getWarnings() {
return warnings;
}
};
}
}
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