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/**
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 *
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 */
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package in.shop2020.serving.controllers;
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import java.io.File;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.List;
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import in.shop2020.model.v1.catalog.InventoryServiceException;
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import in.shop2020.serving.utils.FileUtils;
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import in.shop2020.serving.utils.Utils;
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import in.shop2020.thrift.clients.CatalogServiceClient;
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import org.apache.log4j.Logger;
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import org.apache.struts2.rest.DefaultHttpHeaders;
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import org.apache.struts2.rest.HttpHeaders;
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import org.apache.thrift.TException;
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/**
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 * get best sellers items from the catalog service
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 * @author rajveer
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 *
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 */
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public class BestSellersController extends BaseController {
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	private static final long serialVersionUID = 3380274695464543863L;
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	private static Logger log = Logger.getLogger(Class.class);
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	private static final int windowSize = 20;
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	private long beginIndex = 0;
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	private long totalItems;
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	private String id;
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	List<Long> items = null;
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	CatalogServiceClient catalogClientService = null;
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	public BestSellersController() {
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		super();
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		try {
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			catalogClientService = new CatalogServiceClient();
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		} catch (Exception e) {
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			log.error("Unable to get catalog service client.", e);
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		}
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	}
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    // GET /index
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    public HttpHeaders index() throws Exception {
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        long categoryId = Long.parseLong(request.getParameter("categoryid"));
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        String brandName = request.getParameter("brand");
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        //Right now if we have brand name, we can just send back data for all categories
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        if(brandName!=null){
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            categoryId = -1;
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        }
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    	in.shop2020.model.v1.catalog.InventoryService.Client client = catalogClientService.getClient();
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    	this.items = client.getBestSellersCatalogIds(beginIndex, windowSize, brandName, categoryId);
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    	return new DefaultHttpHeaders("index");
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    }
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    // GET /show
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    public HttpHeaders show() {
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    	in.shop2020.model.v1.catalog.InventoryService.Client client = catalogClientService.getClient();
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    	try {
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			this.setTotalItems(client.getBestSellersCount());
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			this.items = client.getBestSellersCatalogIds(beginIndex, windowSize, null, -1);
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		} catch (InventoryServiceException e) {
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			log.error("Unable to get best sellers from inventory service.", e);
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		} catch (TException e) {
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			log.error("Unable to get best sellers from inventory service.", e);
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		}
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    	return new DefaultHttpHeaders("show");
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    }
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    public List<String> getItems() {
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    	ArrayList<String> snippets = new ArrayList<String>();
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    	if(items != null){
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    		for(long item: items){
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				try {
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					snippets.add(FileUtils.read(Utils.EXPORT_ENTITIES_PATH + item + File.separator +"CategorySnippet.html"));
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				} catch (IOException ioex) {
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					log.error("Error while getting the snippet for: " + item, ioex);
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				}
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			}
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    	}
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    	return snippets;
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    }
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	public void setId(String id) {
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		this.id = id;
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		this.beginIndex = windowSize * (Long.parseLong(id)-1);
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	}
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	public String getId() {
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		return id;
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	}
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	public long getBeginIndex(){
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		if(totalItems>0)
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			return beginIndex+1;
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		return beginIndex;
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	}
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	public void setTotalItems(long totalItems) {
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		this.totalItems = totalItems;
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	}
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	public long getTotalItems() {
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		return totalItems;
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	}
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	public long getTotalPages() {
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		return 1 + totalItems/windowSize;
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	}
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	public long getCurrentPage() {
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		return Long.parseLong(getId());
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	}
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}