Subversion Repositories SmartDukaan

package in.shop2020.ui.util;

import in.shop2020.metamodel.core.Bullet;

import in.shop2020.metamodel.core.Entity;

import in.shop2020.metamodel.core.Feature;

import in.shop2020.metamodel.core.PrimitiveDataObject;

import in.shop2020.metamodel.definitions.Catalog;

import in.shop2020.metamodel.util.CreationUtils;

import in.shop2020.metamodel.util.ExpandedBullet;

import in.shop2020.metamodel.util.ExpandedEntity;

import in.shop2020.metamodel.util.ExpandedFeature;

import in.shop2020.metamodel.util.ExpandedSlide;

import in.shop2020.util.Utils;

import java.io.BufferedWriter;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.io.OutputStreamWriter;

import java.net.URLEncoder;

import java.text.DecimalFormat;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import java.util.Properties;

import org.apache.velocity.Template;

import org.apache.velocity.VelocityContext;

import org.apache.velocity.app.Velocity;

import org.apache.velocity.exception.ParseErrorException;

import org.apache.velocity.exception.ResourceNotFoundException;

import org.json.JSONObject;

/**

 * Utility class to merge Java data objects with VTL scripts.

 * Also generates images and other required stuff for rendering content

 * 

 * @author rajveer

 *

 */

public class NewVUI {

	String contentVersion;  

	public NewVUI(Long contentVersion) throws Exception {

		this.contentVersion = contentVersion.toString();

	}

	/**

	 * Utility method to delete a directory.

	 * @param dir

	 * @return

	 */

	private boolean deleteDir(File dir) {

	    if (dir.isDirectory()) {

	        String[] children = dir.list();

	        for (int i=0; i<children.length; i++) {

	            boolean success = deleteDir(new File(dir, children[i]));

	            if (!success) {

	                return false;

	            }

	        }

	    }

	    // The directory is now empty so delete it

	    return dir.delete();

	}

	/**

	 * Delete old resources of the entity for which content needs to be regenerated  

	 * @param mediaPath

	 * @param contentPath

	 */

	private void deleteOldResources(String mediaPath, String contentPath) {

		File f = new File(contentPath);

		if(f.exists()){

			deleteDir(f);

		}

		f = new File(mediaPath);

		if(f.exists()){

			deleteDir(f);

		}

	}

	/**

	 * It Actually copies the images from some given directory to export directory.

	 * It also attaches the imagePrefix at the end of image name. 

	 * @param catalogId

	 * @param imagePrefix

	 * @throws IOException

	 */

	private void generateImages(long catalogId, String imagePrefix) throws IOException {

		String globalImageDirPath = Utils.CONTENT_DB_PATH + "media" + File.separator;

		String globalDefaultImagePath = globalImageDirPath + "default.jpg";

		String imageDirPath = globalImageDirPath + catalogId + File.separator;

		String defaultImagePath = imageDirPath + "default.jpg";

		/*

		 * Create the directory for this entity if it didn't exist.

		 */

		File f = new File(globalImageDirPath + catalogId);

		if (!f.exists()) {

			f.mkdir();

		}

		/*

		 * If the default image is not present for this entity, copy the global

		 * default image.

		 * TODO: This part will be moved to the Jython Script

		 */

		File f3 = new File(defaultImagePath);

		if (!f3.exists()) {

		        copyFile(globalDefaultImagePath, defaultImagePath);

		    }

		String exportPath = Utils.EXPORT_MEDIA_PATH + catalogId;

		/*

		 * Copying the generated content from db/media to export/media. This

		 * will also insert a timestamp tag in the file names.

		 */

		File sourceFile = new File(globalImageDirPath + catalogId);

		File destinationFile = new File(exportPath);

		copyDirectory(sourceFile, destinationFile, imagePrefix);

		/*

		 * Copy the thumbnail and the icon files. This is required so that we can display the

		 * thumbnail on the cart page and icon on the facebook.

		 */

		copyFile(imageDirPath + "thumbnail.jpg", exportPath + File.separator + "thumbnail.jpg");

		copyFile(imageDirPath + "icon.jpg", exportPath + File.separator + "icon.jpg");

		}

	/**

	 * Copies the contents of the input file into the output file. Creates the

	 * output file if it doesn't exist already.

	 * 

	 * @param inputFile

	 *            File to be copied.

	 * @param outputFile

	 *            File to be created.

	 * @throws IOException

	 */

	private void copyFile(String inputFile, String outputFile) throws IOException {

		File sourceFile = new File(inputFile);

		File destinationFile = new File(outputFile);

		if (!destinationFile.exists())

			destinationFile.createNewFile();

		InputStream in = new FileInputStream(sourceFile);

	    OutputStream out = new FileOutputStream(destinationFile);

		// Copy the bits from instream to outstream

		byte[] buf = new byte[1024];

		int len;

		while ((len = in.read(buf)) > 0) {

			out.write(buf, 0, len);

		}

		in.close();

		out.close();

	}

	/**

	 * Copy the images from one directory to other. It also renames files while copying.

	 * If targetLocation does not exist, it will be created.

	 * @param sourceLocation

	 * @param targetLocation

	 * @param imagePrefix

	 * @throws IOException

	 */

	public void copyDirectory(File sourceLocation , File targetLocation, String imagePrefix) throws IOException {

	    if (sourceLocation.isDirectory()) {

	        if (!targetLocation.exists()) {

	            targetLocation.mkdir();

	        }

	        String[] children = sourceLocation.list();

	        for (int i=0; i<children.length; i++) {

	            copyDirectory(new File(sourceLocation, children[i]), new File(targetLocation, children[i]), imagePrefix);

	        }

	    } else {

	        InputStream in = new FileInputStream(sourceLocation);

        	String fileName = targetLocation.getName().split("\\.")[0];

        	String fileExt = targetLocation.getName().split("\\.")[1];

        	String newFileName = targetLocation.getParent() + File.separator + imagePrefix + "-" + fileName + "-" + this.contentVersion + "." + fileExt; 

	        //String fileName = targetLocation

	        OutputStream out = new FileOutputStream(newFileName);

	        // Copy the bits from instream to outstream

	        byte[] buf = new byte[1024];

	        int len;

	        while ((len = in.read(buf)) > 0) {

	            out.write(buf, 0, len);

	        }

	        in.close();

	        out.close();

	    }

	}

	/**

	 * Get the commonly used product properties and store them in a file.  

	 * @param expEntity

	 * @param exportPath

	 */

	private  void getProductPropertiesSnippet(ExpandedEntity expEntity, String exportPath) {

        long catalogId = expEntity.getID();

        try {

            expEntity = CreationUtils.getExpandedEntity(catalogId);

        } catch (Exception e) {

            e.printStackTrace();

        }

        String metaDescription = "";

        String metaKeywords = "";

        String entityUrl = getEntityURL(expEntity);

        String title = "";

        List<Feature>  features = expEntity.getSlide(130054).getFeatures();

        for(Feature feature: features){

            if(feature.getFeatureDefinitionID() == 120132){

                PrimitiveDataObject dataObject= (PrimitiveDataObject)feature.getBullets().get(0).getDataObject();

                title = dataObject.getValue(); 

            }

            if(feature.getFeatureDefinitionID() == 120133){

                PrimitiveDataObject dataObject= (PrimitiveDataObject)feature.getBullets().get(0).getDataObject();

                metaDescription = dataObject.getValue();

            }

            if(feature.getFeatureDefinitionID() == 120134){

                PrimitiveDataObject dataObject= (PrimitiveDataObject)feature.getBullets().get(0).getDataObject();

                metaKeywords = dataObject.getValue();

            }

        }

        try {

            JSONObject props = new JSONObject();

            props.put("metaDescription", metaDescription);

            props.put("metaKeywords", metaKeywords);

            props.put("entityUrl", entityUrl);

            props.put("title", title);

            props.put("name", getProductName(expEntity));

            String exportFileName = exportPath + catalogId + File.separator

                    + "ProductPropertiesSnippet.vm";

            File exportFile = new File(exportFileName);

            if (!exportFile.exists()) {

                exportFile.createNewFile();

            }

            BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(

                    new FileOutputStream(exportFile)));

            writer.write(props.toString());

            writer.flush();

            writer.close();

        } catch (Exception e) {

            e.printStackTrace();

        }

	}

	/**

	 * Get slide names and write them in a file. This file will be used in comparison.

	 * @param expEntity

	 * @param exportPath

	 * @throws Exception

	 */

    private void getSlidenamesSnippet(ExpandedEntity expEntity, String exportPath) throws Exception{

	    long catalogId = expEntity.getID();

	    StringBuilder slideNames = new StringBuilder();

	    //TODO Investigate why brand + model number is used ?

	    slideNames.append(expEntity.getBrand() + " " + expEntity.getModelNumber() + " " + expEntity.getModelName() + "\n");

	    Map<Long, Double> slideScores = CreationUtils.getSlideComparisonScores(catalogId);

	    for(ExpandedSlide expSlide: expEntity.getExpandedSlides()){

	        if(expSlide.getSlideDefinitionID() == 130054){

	            continue;

	        }

	        slideNames.append(expSlide.getSlideDefinition().getLabel() + "!!!");

	        String bucketName = "None";

	        if(Catalog.getInstance().getDefinitionsContainer().getComparisonBucketName(expEntity.getCategoryID(), expSlide.getSlideDefinitionID()) != null){

	            bucketName = Catalog.getInstance().getDefinitionsContainer().getComparisonBucketName(expEntity.getCategoryID(), expSlide.getSlideDefinitionID());

	        }

	        slideNames.append(bucketName + "!!!");

	        double score = 0;

	        if(slideScores.get(expSlide.getSlideDefinitionID())!=null){

	            score = slideScores.get(expSlide.getSlideDefinitionID());

	        }

	        DecimalFormat oneDForm = new DecimalFormat("#.#");

	        score = Double.valueOf(oneDForm.format(score));

	        slideNames.append(score + "\n");

	    }

        String exportFileName = exportPath + catalogId + File.separator + "SlideNamesSnippet.vm";

        File exportFile = new File(exportFileName);

        if(!exportFile.exists()) {

            exportFile.createNewFile();

        }

        BufferedWriter writer = new BufferedWriter(

            new OutputStreamWriter(new FileOutputStream(exportFile)));

        writer.write(slideNames.toString());

        writer.flush();

        writer.close();

	}

    /**

     * Get the name of the product from entity. It considers null values also

     * @param expEntity

     * @return

     */

	private String getProductName(ExpandedEntity expEntity){

		//FIXME Use stringbuilder

		String productName = ((expEntity.getBrand() != null) ? expEntity.getBrand().trim() + " " : "")

		+ ((expEntity.getModelName() != null) ? expEntity.getModelName().trim() + " " : "")

		+ (( expEntity.getModelNumber() != null ) ? expEntity.getModelNumber().trim() : "" );	

		return productName;

	}

	/**

	 * Get url of the entity. 

	 * @param expEntity

	 * @return

	 */

	private String getEntityURL(ExpandedEntity expEntity){

		String url = "/" + expEntity.getCategory().getParentCategory().getLabel().toLowerCase().replace(' ', '-') + "/";

		if(expEntity.getCategory().getParentCategory().getID() == Utils.ROOT_CATAGOEY){

			url = "/" + expEntity.getCategory().getLabel().toLowerCase().replace(' ', '-') + "/";

		}

		String productName = getProductName(expEntity);

		String productUrl = productName.toLowerCase().replace(' ', '-') + "-" + expEntity.getID();

		productUrl = productUrl.replaceAll("/", "-");

		url = url + productUrl;

		url = url.replaceAll("-+", "-");

		return url;

	}

	/**

	 * get image prefix

	 * @param expEntity

	 * @return

	 */

	private String getImagePrefix(ExpandedEntity expEntity){

		String productName = getProductName(expEntity);

		String imagePrefix = productName.toLowerCase().replace(' ', '-');

		imagePrefix = imagePrefix.replaceAll("/", "-");

		imagePrefix = imagePrefix.replaceAll("-+", "-");

		return imagePrefix;

	}

	/**

	 * Get the required parameters for generating velocity content.

	 * @param expEntity

	 * @return

	 * @throws Exception

	 */

	private Map<String, String> getEntityParameters(ExpandedEntity expEntity) throws Exception{

		Map<String,String> params = new HashMap<String, String>();

		String title = getProductName(expEntity);

		String brandName = expEntity.getBrand().trim();

		String productName =  ((expEntity.getModelName() != null) ? expEntity.getModelName().trim() + " " : "")

		+ ((expEntity.getModelNumber() != null) ? expEntity.getModelNumber().trim() : "");

		String prodName = title;

		if (expEntity.getModelName() != null && !expEntity.getModelName().isEmpty() && (expEntity.getBrand().equals("Samsung") || expEntity.getBrand().equals("Sony Ericsson"))) {

			prodName = expEntity.getBrand().trim() + " " + ((expEntity.getModelName() != null) ? expEntity.getModelName().trim() : "");

		}

		String categoryName = expEntity.getCategory().getLabel();

		String tagline = "";

		String warranty = "";

		String tinySnippet = "";

		List<Feature>  features = expEntity.getSlide(130054).getFeatures();

		for(Feature feature: features){

			if(feature.getFeatureDefinitionID() == 120084){

				PrimitiveDataObject dataObject= (PrimitiveDataObject)feature.getBullets().get(0).getDataObject();

				tagline = dataObject.getValue(); 

			}

			if(feature.getFeatureDefinitionID() == 120125){

				ExpandedFeature expFeature = new ExpandedFeature(feature);

				ExpandedBullet expBullet =expFeature.getExpandedBullets().get(0);

				if(expBullet != null){

					warranty = expBullet.getValue() + " "+ expBullet.getUnit().getShortForm();

				}

			}

			if(feature.getFeatureDefinitionID() == 120089){

				PrimitiveDataObject dataObject= (PrimitiveDataObject)feature.getBullets().get(0).getDataObject();

				tinySnippet = dataObject.getValue(); 

			}

			if(feature.getFeatureDefinitionID() == 120081){

				List<Bullet> bullets = feature.getBullets();

				int count = 1;

				for(Bullet bullet: bullets){

					PrimitiveDataObject dataObject = (PrimitiveDataObject)bullet.getDataObject();

					params.put("SNIPPET_"+count++, dataObject.getValue());

				}

			}

		}

		long categoryId = expEntity.getCategory().getID();

		params.put("PROD_NAME", prodName);

		params.put("URL", getEntityURL(expEntity));

		params.put("TITLE", title);

		params.put("BRAND_NAME", brandName);

		params.put("PRODUCT_NAME", productName);

		params.put("CATEGORY_ID", ((int)categoryId)+"");

		params.put("CATEGORY_NAME", categoryName);

		params.put("CATEGORY_URL", categoryName.replaceAll(" ", "-").toLowerCase() + "/" + categoryId);

		params.put("PRODUCT_URL", URLEncoder.encode("http://www.", "UTF-8") + "${domain}"  + URLEncoder.encode(this.getEntityURL(expEntity), "UTF-8"));

		if(expEntity.getCategory().getParentCategory().getID() == Utils.MOBILE_PHONES_CATAGOEY){

			params.put("IS_MOBILE", "TRUE" );	

		}else{

			params.put("IS_MOBILE", "FALSE" );

		}

		params.put("CATALOG_ID", expEntity.getID()+"");

		params.put("TAGLINE", tagline);

		params.put("WARRANTY", warranty);

		params.put("TINY_SNIPPET", tinySnippet);

		params.put("IMAGE_PREFIX", getImagePrefix(expEntity));

		params.put("contentVersion", contentVersion);

		return params;

	}

	/**

	 * Generates content for the specified entity embedding links to the

	 * specified domain name.

	 * 

	 * The method updates the member variable problems in any of the following

	 * four cases:

	 * <ol>

	 * <li>The entity is not ready.

	 * <li>The category has not been updated yet. (Set to -1).

	 * <li>There are no items in the catalog corresponding to this entity.

	 * <li>There are no active or content-complete items in the catalog

	 * corresponding to this entity.

	 * <li>Neither the items have been updated nor the content has been updated.

	 * </ol>

	 * 

	 * @param entity

	 *            - Entity for which the content has to be generated.

	 * @param domain

	 *            - The domain name to be used to serve static content.

	 * @param exportPath

	 *            - Local file system path where content has to be generated.

	 * @return -True if content is generated successfully, False otherwise.

	 * @throws Exception

	 */

	public void generateContentForOneEntity(Entity entity, String exportPath) throws Exception{

		String mediaPath = Utils.EXPORT_MEDIA_PATH + entity.getID(); 

		deleteOldResources(mediaPath, exportPath + entity.getID()); //Remove old resources. ie images and html content

        ExpandedEntity expEntity = new ExpandedEntity(entity);

		long catalogId = expEntity.getID();

		//Create new directory

		File exportDir = new File(exportPath + catalogId);

		if(!exportDir.exists()) {

			exportDir.mkdir();

		}

		VelocityContext context = new VelocityContext();

		context.put("imagePrefix", getImagePrefix(expEntity));

		context.put("expentity", expEntity);

		context.put("contentVersion", this.contentVersion);

		context.put("defs", Catalog.getInstance().getDefinitionsContainer());

        context.put("helpdocs", CreationUtils.getHelpdocs());

        context.put("params", getEntityParameters(expEntity));

		List<String> filenames = new ArrayList<String>();

		filenames.add("ProductDetail");

		filenames.add("WidgetSnippet");

		filenames.add("HomeSnippet");

		filenames.add("SearchSnippet");

		filenames.add("CategorySnippet");

		filenames.add("SlideGuide");

		filenames.add("PhonesIOwnSnippet");

		if(expEntity.getCategory().getParentCategory().getID() == Utils.MOBILE_PHONES_CATAGOEY){

			filenames.add("CompareProductSnippet");

			filenames.add("ComparisonSnippet");

			filenames.add("CompareProductSummarySnippet");

			// This method wont use any velocity file, So calling directly

			getSlidenamesSnippet(expEntity, exportPath);

		}

		// This method wont use any velocity file, So calling directly

		getProductPropertiesSnippet(expEntity, exportPath);

		applyVelocityTemplate(filenames,exportPath,context,catalogId);

		generateImages(expEntity.getID(), getImagePrefix(expEntity));

	}

	/**

	 * Get list of files and apply velocity templates on them

	 * @param filenames

	 * @param exportPath

	 * @param context

	 * @param catalogId

	 */

	private void applyVelocityTemplate(List<String> filenames, String exportPath, VelocityContext context, long catalogId){

		try {

			Properties p = new Properties();

			p.setProperty("resource.loader", "file");

			p.setProperty("file.resource.loader.class","org.apache.velocity.runtime.resource.loader.FileResourceLoader");

			p.setProperty( "file.resource.loader.path", Utils.VTL_SRC_PATH);

			Velocity.init(p);

			for(String filename: filenames){

				Template template = Velocity.getTemplate(filename + ".vm");

				BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(exportPath + catalogId + File.separator +filename+".vm")));

				template.merge(context, writer);

				writer.flush();

				writer.close();	

			}

		}catch (ResourceNotFoundException e) {

			// TODO Auto-generated catch block

			e.printStackTrace();

		} catch (IOException e) {

			// TODO Auto-generated catch block

			e.printStackTrace();

		} catch (ParseErrorException e) {

			// TODO Auto-generated catch block

			e.printStackTrace();

		} catch (Exception e) {

			// TODO Auto-generated catch block

			e.printStackTrace();

		}

	}

}