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sphere-java-client
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package io.sphere.internal;

import io.sphere.client.*;
import io.sphere.client.model.VersionedId;
import io.sphere.client.shop.model.ProductUpdate;
import io.sphere.internal.command.ProductCommands;
import io.sphere.internal.command.UpdateCommand;
import io.sphere.internal.request.ProductRequestFactory;
import io.sphere.client.filters.expressions.FilterExpression;
import io.sphere.client.shop.ApiMode;
import io.sphere.client.shop.ProductService;
import io.sphere.client.shop.model.Product;
import static io.sphere.internal.util.ListUtil.list;

import com.google.common.collect.ImmutableList;
import net.jcip.annotations.Immutable;

import java.util.Locale;

@Immutable
public final class ProductServiceImpl implements ProductService {
    private final ProductRequestFactory requestFactory;
    private ApiMode apiMode;
    private final ProjectEndpoints endpoints;
    private final Locale defaultLocale;

    public ProductServiceImpl(ProductRequestFactory requestFactory, ApiMode apiMode, ProjectEndpoints endpoints, Locale defaultLocale) {
        this.requestFactory = requestFactory;
        this.apiMode = apiMode;
        this.endpoints = endpoints;
        this.defaultLocale = defaultLocale;
    }

    @Override public FetchRequest byId(String id) {
        return requestFactory.createFetchRequest(endpoints.products.byId(id), this.apiMode);
    }

    @Override public FetchRequest bySlug(Locale locale, String slug) {
        return requestFactory.createFetchRequestBasedOnQuery(endpoints.products.bySlug(locale, slug), this.apiMode);
    }

    @Override public FetchRequest bySlug(String slug) {
        return bySlug(defaultLocale, slug);
    }

    private static final ImmutableList noFilters = ImmutableList.of();
    @Override public SearchRequest all(Locale locale) {
        return filter(locale, noFilters);
    }

    @Override
    public SearchRequest all() {
        return all(defaultLocale);
    }

    @Override public SearchRequest filter(Locale locale, FilterExpression filter, FilterExpression... filters) {
        return filter(locale, list(filter, filters));
    }

    @Override
    public SearchRequest filter(FilterExpression filter, FilterExpression... filters) {
        return filter(defaultLocale, filter, filters);
    }

    @Override public SearchRequest filter(Locale locale, Iterable filters) {
        return requestFactory.createSearchRequest(endpoints.products.search(), this.apiMode, filters, locale);
    }

    @Override
    public QueryRequest query() {
        return requestFactory.createQueryRequest(endpoints.products.root(), this.apiMode);
    }

    @Override 
    public CommandRequest updateProduct(VersionedId productId, ProductUpdate update) {
        return requestFactory.createCommandRequest(
                endpoints.backendProducts.byId(productId.getId()),
                this.apiMode,
                new UpdateCommand(productId.getVersion(), update));
    }
}