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Broderick Labs for fluent vaadin flow. Inherits common Vaadin components.

There is a newer version: 22.0.1

package org.bklab.flow.util.url;

import com.vaadin.flow.component.Component;
import com.vaadin.flow.component.UI;
import com.vaadin.flow.function.SerializableSupplier;
import com.vaadin.flow.router.QueryParameters;

import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.util.*;
import java.util.function.Consumer;
import java.util.function.Function;
import java.util.function.Predicate;
import java.util.stream.Collectors;
import java.util.stream.Stream;

public class QueryParameterBuilder implements SerializableSupplier {

    private final Map> map;

    public QueryParameterBuilder() {
        this.map = new LinkedHashMap<>();
    }

    public QueryParameterBuilder(QueryParameters queryParameters) {
        this.map = queryParameters.getParameters();
    }

    @SafeVarargs
    public final  QueryParameterBuilder add(Function function, String name, T... params) {
        this.map.put(name, params == null || params.length < 1
                ? Collections.emptyList()
                : Stream.of(params).map(function).collect(Collectors.toList()));
        return this;
    }

    public QueryParameterBuilder add(String name, Object... params) {
        this.map.put(name, params == null || params.length < 1
                ? Collections.emptyList()
                : Stream.of(params).map(String::valueOf).collect(Collectors.toList()));
        return this;
    }

    public QueryParameterBuilder encode(String name, Object ... params) {
        return add(name, Arrays.stream(params).map(String::valueOf)
                .map(s -> URLEncoder.encode(s, StandardCharsets.UTF_8))
                .collect(Collectors.toList()).toArray(new Object[]{}));
    }

    public QueryParameterBuilder add(boolean add, String name, Object... params) {
        return add ? add(name, params) : this;
    }

    @SafeVarargs
    public final  QueryParameterBuilder add(Predicate add, String name, T... params) {
        return add(name, params == null ? Collections.emptyList()
                : Stream.of(params).filter(add).collect(Collectors.toList()));
    }

    public QueryParameterBuilder peek(Consumer consumer) {
        consumer.accept(this);
        return this;
    }

    @Override
    public QueryParameters get() {
        return new QueryParameters(map);
    }


    public > Consumer getNavigateConsumer(C target) {
        return ui -> navigate(ui, target);
    }

    public > QueryParameterBuilder navigate(C target) {
        return navigate(UI.getCurrent(), target);
    }

    public > QueryParameterBuilder navigate(UI ui, C target) {
        ui.getInternals().getRouter().getRegistry().getTargetUrl(target).ifPresent(uri -> ui.navigate(uri, get()));
        return this;
    }
}