RWU/EasyDrop
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

#39 Added basic implementation

Browse Source
This commit is contained in:
Marvin Scham
2023-05-23 02:58:10 +02:00
parent 175140451d
commit 70221d26a6
5 changed files with 304 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
src/main/java/de/rwu/easydrop/Main.java
View File

@@ -1,5 +1,8 @@
package de.rwu.easydrop;
import de.rwu.easydrop.api.client.AmazonProductDataSource;
import de.rwu.easydrop.util.ConfigUtil;
/**
* Kickoff point for the service.
*
@@ -19,6 +22,11 @@ public final class Main {
* @param args
*/
public static void main(final String[] args) {
System.out.println("I'm alive!");
String amznBaseUrl = ConfigUtil.getConfig("AMAZON_API_URL");
String amznApiKey = ConfigUtil.getConfig("AMAZON_API_KEY");
AmazonProductDataSource amznSrc = new AmazonProductDataSource(amznBaseUrl, amznApiKey);
System.out.print(amznSrc.getProductDTOById("B096Y2TYKV").toString());
}
}

121
src/main/java/de/rwu/easydrop/api/client/AmazonProductDataSource.java Normal file
View File

@@ -0,0 +1,121 @@
package de.rwu.easydrop.api.client;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import org.json.JSONException;
import org.json.JSONObject;
import de.rwu.easydrop.api.dto.ProductDTO;
/**
* Interface to an Amazon data source.
*
* @since 0.1.0
*/
public final class AmazonProductDataSource implements DataSource {
/**
* Name of this data source.
*/
private static final String DATA_ORIGIN = "Amazon";
/**
* Base URL to the Amazon data source.
*/
private String baseUrl;
/**
* Credential key to authorize acccess.
*/
private String apiKey;
/**
* Product region parameter required for data access.
*/
private static final String PRODUCT_REGION = "DE";
/**
* Locale parameter required for data access.
*/
private static final String LOCALE = "de_DE";
/**
* Sets up instance with Base URL and API Key.
*
* @param newBaseUrl
* @param newApiKey
*/
public AmazonProductDataSource(final String newBaseUrl, final String newApiKey) {
this.baseUrl = newBaseUrl;
this.apiKey = newApiKey;
}
@Override
public ProductDTO getProductDTOById(final String productId) {
JSONObject offer = null;
ProductDTO product = new ProductDTO(productId, DATA_ORIGIN);
try {
URL apiUrl = new URL(
baseUrl
+ "/products/2020-08-26/products/"
+ productId
+ "/offers?productRegion="
+ PRODUCT_REGION
+ "&locale="
+ LOCALE);
HttpURLConnection connection = (HttpURLConnection) apiUrl.openConnection();
connection.setRequestMethod("GET");
connection.setRequestProperty("Credential", apiKey);
int responseCode = connection.getResponseCode();
BufferedReader reader;
if (responseCode == HttpURLConnection.HTTP_OK) {
reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
} else {
return product;
}
String line;
StringBuilder response = new StringBuilder();
while ((line = reader.readLine()) != null) {
response.append(line);
}
reader.close();
offer = new JSONObject(response.toString());
} catch (IOException e) {
e.printStackTrace();
}
if (offer == null) {
return product;
}
try {
offer = offer.getJSONObject("featuredOffer");
product.setDataOrigin(DATA_ORIGIN);
product.setAvailable(offer
.getString("availability")
.equals("available"));
product.setCurrentPrice(offer
.getJSONObject("price")
.getJSONObject("value")
.getDouble("amount"));
product.setDeliveryPrice(offer
.getJSONArray("shippingOptions")
.getJSONObject(0)
.getJSONObject("shippingCost")
.getJSONObject("value")
.getDouble("amount"));
product.setMerchant(offer
.getJSONObject("merchant")
.getString("name"));
} catch (JSONException e) {
return product;
}
return product;
}
}

9
src/main/java/de/rwu/easydrop/api/client/DataSource.java
View File

@@ -12,12 +12,5 @@ public interface DataSource {
* @param productId Identifier
* @return ProductDTO
*/
ProductDTO getProductById(String productId);
/**
* Breaks the connection after specified time.
*
* @param timeoutSeconds Seconds to time out after
*/
void setConnectionTimeout(int timeoutSeconds);
ProductDTO getProductDTOById(String productId);
}

138
src/main/java/de/rwu/easydrop/api/dto/ProductDTO.java
View File

@@ -1,8 +1,146 @@
package de.rwu.easydrop.api.dto;
import de.rwu.easydrop.util.FormattingUtil;
/**
* Product data transfer object.
*
* @since 0.1.0
*/
public class ProductDTO {
/**
* Data source platform, like "Amazon".
*/
private String dataOrigin;
/**
* @return the dataOrigin
*/
public String getDataOrigin() {
return dataOrigin;
}
/**
* @param newDataOrigin the dataOrigin to set
*/
public void setDataOrigin(final String newDataOrigin) {
this.dataOrigin = newDataOrigin;
}
/**
* Platform internal product identifier.
*/
private String productId;
/**
* @return the productId
*/
public String getProductId() {
return productId;
}
/**
* @param newProductId the productId to set
*/
public void setProductId(final String newProductId) {
this.productId = newProductId;
}
/**
* Current product price per piece in Euro.
*/
private double currentPrice;
/**
* @return the currentPrice
*/
public double getCurrentPrice() {
return currentPrice;
}
/**
* @param newCurrentPrice the currentPrice to set
*/
public void setCurrentPrice(final double newCurrentPrice) {
this.currentPrice = newCurrentPrice;
}
/**
* Name of mercant offering the product on the platform.
*/
private String merchant;
/**
* @return the merchant
*/
public String getMerchant() {
return merchant;
}
/**
* @param newMerchant the merchant to set
*/
public void setMerchant(final String newMerchant) {
this.merchant = newMerchant;
}
/**
* Additional Cost for delivery in Euro.
*/
private double deliveryPrice;
/**
* @return the deliveryPrice
*/
public double getDeliveryPrice() {
return deliveryPrice;
}
/**
* @param newDeliveryPrice the deliveryPrice to set
*/
public void setDeliveryPrice(final double newDeliveryPrice) {
this.deliveryPrice = newDeliveryPrice;
}
/**
* Whether the product can be purchased at this point.
*/
private boolean available;
/**
* @return the available
*/
public boolean isAvailable() {
return available;
}
/**
* @param newAvailable the available to set
*/
public void setAvailable(final boolean newAvailable) {
this.available = newAvailable;
}
/**
* Creates ProductDTO instance.
*
* @param newProductId Interal Product indetifier
* @param newDataOrigin Data Origin
*/
public ProductDTO(final String newProductId, final String newDataOrigin) {
this.productId = newProductId;
this.dataOrigin = newDataOrigin;
}
@Override
public final String toString() {
return "ProductDTO{"
+ productId + " from "
+ merchant + " ("
+ dataOrigin + ")"
+ " at "
+ FormattingUtil.formatEuro(currentPrice) + " (available: "
+ (available ? "yes" : "no") + ")}";
}
}

36
src/main/java/de/rwu/easydrop/util/FormattingUtil.java
View File

@@ -1,5 +1,39 @@
package de.rwu.easydrop.util;
public class FormattingUtil {
import java.text.NumberFormat;
import java.util.Currency;
import java.util.Locale;
/**
* Helps format a bunch of things.
*
* @since 0.1.0
*/
public final class FormattingUtil {
/**
* Private constructor to prevent unwanted instantiation.
*
* @throws UnsupportedOperationException always
*/
private FormattingUtil() throws UnsupportedOperationException {
throw new UnsupportedOperationException("This is a utility class, don't instantiate it.");
}
/**
* Formats a price to the German Euro format.
*
* @param amount price
* @return formatted price
*/
public static String formatEuro(final double amount) {
// Set up environment
Locale locale = Locale.GERMANY;
Currency currency = Currency.getInstance("EUR");
NumberFormat numberFormat = NumberFormat.getCurrencyInstance(locale);
numberFormat.setCurrency(currency);
return numberFormat.format(amount);
}
}