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feat: add support for Google Wallet passes
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14 changes: 14 additions & 0 deletions
14
src/main/java/ch/wisv/events/core/service/googlewallet/GoogleWalletService.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,14 @@ | ||
| package ch.wisv.events.core.service.googlewallet; | ||
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| import ch.wisv.events.core.exception.normal.TicketPassFailedException; | ||
| import ch.wisv.events.core.model.ticket.Ticket; | ||
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| public interface GoogleWalletService { | ||
| /** | ||
| * Get Google Wallet pass for a Ticket. | ||
| * @param ticket of type Ticket. | ||
| * @return A link the user can use to add the ticket to their wallet. | ||
| * @throws TicketPassFailedException when pass is not generated | ||
| */ | ||
| String getPass(Ticket ticket) throws TicketPassFailedException; | ||
| } |
206 changes: 206 additions & 0 deletions
206
src/main/java/ch/wisv/events/core/service/googlewallet/GoogleWalletServiceImpl.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,206 @@ | ||
| package ch.wisv.events.core.service.googlewallet; | ||
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| import org.springframework.beans.factory.annotation.Value; | ||
| import org.springframework.stereotype.Service; | ||
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| import ch.wisv.events.core.exception.normal.TicketPassFailedException; | ||
| import ch.wisv.events.core.model.event.Event; | ||
| import ch.wisv.events.core.model.product.Product; | ||
| import ch.wisv.events.core.model.ticket.Ticket; | ||
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| import com.auth0.jwt.JWT; | ||
| import com.auth0.jwt.algorithms.Algorithm; | ||
| import com.google.api.services.walletobjects.WalletobjectsScopes; | ||
| import com.google.api.services.walletobjects.model.*; | ||
| import com.google.auth.oauth2.ServiceAccountCredentials; | ||
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| import jakarta.validation.constraints.NotNull; | ||
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| import java.io.IOException; | ||
| import java.security.interfaces.RSAPrivateKey; | ||
| import java.time.Instant; | ||
| import java.time.LocalDateTime; | ||
| import java.time.ZoneOffset; | ||
| import java.time.format.DateTimeFormatter; | ||
| import java.util.Arrays; | ||
| import java.util.HashMap; | ||
| import java.util.List; | ||
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| @Service | ||
| public class GoogleWalletServiceImpl implements GoogleWalletService { | ||
| /** Service account credentials for Google Wallet APIs. */ | ||
| public static ServiceAccountCredentials credentials; | ||
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| @Value("${googleWallet.issuerId}") | ||
| @NotNull | ||
| private String issuerId; | ||
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| @Value("${googleWallet.baseUrl}") | ||
| @NotNull | ||
| private String baseUrl; | ||
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| @Value("${googleWallet.origin}") | ||
| @NotNull | ||
| private String origin; | ||
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| @Value("${links.gtc}") | ||
| @NotNull | ||
| private String linkGTC; | ||
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| /** | ||
| * Get Google Wallet pass for a Ticket. | ||
| * | ||
| * @param ticket of type Ticket. | ||
| * @return A link the user can use to add the ticket to their wallet. | ||
| * @throws TicketPassFailedException when pass is not generated | ||
| */ | ||
| public String getPass(Ticket ticket) throws TicketPassFailedException { | ||
| if (credentials == null) { | ||
| try { | ||
| credentials = (ServiceAccountCredentials) ServiceAccountCredentials | ||
| .getApplicationDefault() | ||
| .createScoped(List.of(WalletobjectsScopes.WALLET_OBJECT_ISSUER)); | ||
| credentials.refresh(); | ||
| } catch (IOException e) { | ||
| System.out.println("WARN: Failed to authenticate with Google"); | ||
| return "https://pay.google.com/gp/v/save/FAILED"; | ||
| } | ||
| } | ||
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| Product product = ticket.getProduct(); | ||
| EventTicketClass newClass = this.createClass(product); | ||
| EventTicketObject newObject = this.createObject(ticket); | ||
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| HashMap<String, Object> claims = new HashMap<String, Object>(); | ||
| claims.put("iss", credentials.getClientEmail()); | ||
| claims.put("aud", "google"); | ||
| claims.put("origins", List.of(origin)); | ||
| claims.put("typ", "savetowallet"); | ||
| claims.put("iat", Instant.now().getEpochSecond()); | ||
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| HashMap<String, Object> payload = new HashMap<String, Object>(); | ||
| payload.put("eventTicketClasses", List.of(newClass)); | ||
| payload.put("eventTicketObjects", List.of(newObject)); | ||
| claims.put("payload", payload); | ||
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| Algorithm algorithm = Algorithm.RSA256( | ||
| null, (RSAPrivateKey) credentials.getPrivateKey()); | ||
| String token = JWT.create().withPayload(claims).sign(algorithm); | ||
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| return String.format("https://pay.google.com/gp/v/save/%s", token); | ||
| } | ||
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| /** | ||
| * Create the passes class based on the product. | ||
| * | ||
| * @param product The product to base it on. | ||
| * @return A Google compatible Ticket class. | ||
| */ | ||
| private EventTicketClass createClass(Product product) { | ||
| String homePage = product.getEvent().hasExternalProductUrl() | ||
| ? product.getEvent().getExternalProductUrl() | ||
| : baseUrl; | ||
| Uri tnc = new Uri() | ||
| .setUri(linkGTC) | ||
| .setDescription("Terms & Conditions") | ||
| .setId("LINK_GTC"); | ||
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| return new EventTicketClass() | ||
| .setId(this.getClassId(product)) | ||
| .setIssuerName("Christiaan Huygens") | ||
| .setReviewStatus("UNDER_REVIEW") | ||
| .setHexBackgroundColor("#1e274a") | ||
| .setEventName(this.makeLocalString(this.formatProduct(product))) | ||
| .setWideLogo(this.makeImage(String.format("%s/images/ch-logo.png", baseUrl))) | ||
| .setLogo(this.makeImage(String.format("%s/icons/apple-touch-icon.png", baseUrl))) | ||
| .setLinksModuleData(new LinksModuleData().setUris(Arrays.asList(tnc))) | ||
| .setHomepageUri(new Uri() | ||
| .setUri(homePage) | ||
| .setDescription("Events")) | ||
| .setVenue(new EventVenue() | ||
| .setName(this.makeLocalString(product.getEvent().getLocation())) | ||
| .setAddress(this.makeLocalString("Mekelweg 4, 2628 CD Delft"))) | ||
| .setDateTime(new EventDateTime() | ||
| .setStart(this.formatDate(product.getEvent().getStart())) | ||
| .setEnd(this.formatDate(product.getEvent().getEnding()))); | ||
| } | ||
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| private EventTicketObject createObject(Ticket ticket) { | ||
| Money cost = new Money().setCurrencyCode("EUR").setMicros((long) (ticket.getProduct().cost * 1000000)); | ||
| Uri tnc = new Uri() | ||
| .setUri(linkGTC) | ||
| .setDescription("Terms & Conditions") | ||
| .setId("LINK_GTC"); | ||
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| return new EventTicketObject() | ||
| .setId(this.getObjectId(ticket)) | ||
| .setClassId(this.getClassId(ticket.getProduct())) | ||
| .setState("ACTIVE") | ||
| .setTicketNumber(ticket.getKey()) | ||
| .setTicketHolderName(ticket.getOwner().getName()) | ||
| .setHexBackgroundColor("#1e274a") | ||
| .setFaceValue(cost) | ||
| .setBarcode(new Barcode().setType("QR_CODE").setValue(ticket.getUniqueCode())) | ||
| .setLinksModuleData(new LinksModuleData().setUris(Arrays.asList(tnc))); | ||
| } | ||
|
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| /** | ||
| * Get the ID of a product. | ||
| * | ||
| * @param product The product to derive the ID. | ||
| * @return The ID | ||
| */ | ||
| private String getClassId(Product product) { | ||
| return String.format("%s.%s", issuerId, product.getKey()); | ||
| } | ||
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| /** | ||
| * Get the object ID of a ticket. | ||
| * | ||
| * @param ticket The ticket to get the ID for. | ||
| * @return The ID | ||
| */ | ||
| private String getObjectId(Ticket ticket) { | ||
| return String.format("%s-%s", this.getClassId(ticket.getProduct()), ticket.getKey()); | ||
| } | ||
|
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| /** | ||
| * Format the product name accorting to if they have a second product | ||
| * | ||
| * @param product | ||
| * @return | ||
| */ | ||
| private String formatProduct(Product product) { | ||
| Event event = product.getEvent(); | ||
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| if (event.getProducts().size() <= 1) { | ||
| return event.getTitle(); | ||
| } else { | ||
| return String.format("%s - %s", event.getTitle(), product.getTitle()); | ||
| } | ||
| } | ||
|
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| /** | ||
| * Format a local date to the string format Google expects. | ||
| * | ||
| * @param localDate The Java date object. | ||
| * @return The date in string form. | ||
| */ | ||
| private String formatDate(LocalDateTime localDate) { | ||
| DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSX"); | ||
| String formattedDate = localDate.atOffset(ZoneOffset.UTC).format(formatter); | ||
| return formattedDate; | ||
| } | ||
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| private LocalizedString makeLocalString(String str) { | ||
| TranslatedString defaultLang = new TranslatedString() | ||
| .setLanguage("en-US") | ||
| .setValue(str); | ||
| return new LocalizedString().setDefaultValue(defaultLang); | ||
| } | ||
|
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| private Image makeImage(String src) { | ||
| ImageUri uri = new ImageUri().setUri(src); | ||
| return new Image().setSourceUri(uri); | ||
| } | ||
| } |
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