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package moe.yuuta.dn42peering.asn;
import io.vertx.core.*;
import io.vertx.core.buffer.Buffer;
import io.vertx.core.http.HttpHeaders;
import io.vertx.core.impl.logging.Logger;
import io.vertx.core.impl.logging.LoggerFactory;
import io.vertx.core.json.JsonObject;
import io.vertx.ext.mail.MailClient;
import io.vertx.ext.mail.MailConfig;
import io.vertx.ext.mail.MailMessage;
import io.vertx.ext.mail.MailResult;
import io.vertx.ext.web.Router;
import io.vertx.ext.web.common.template.TemplateEngine;
import io.vertx.ext.web.handler.BodyHandler;
import io.vertx.ext.web.templ.freemarker.FreeMarkerTemplateEngine;
import io.vertx.ext.web.validation.RequestParameters;
import io.vertx.ext.web.validation.RequestPredicate;
import io.vertx.ext.web.validation.ValidationHandler;
import io.vertx.ext.web.validation.builder.Bodies;
import io.vertx.json.schema.SchemaParser;
import io.vertx.json.schema.SchemaRouter;
import io.vertx.json.schema.SchemaRouterOptions;
import io.vertx.json.schema.common.dsl.ObjectSchemaBuilder;
import moe.yuuta.dn42peering.jaba.Pair;
import moe.yuuta.dn42peering.portal.FormException;
import moe.yuuta.dn42peering.portal.HTTPException;
import moe.yuuta.dn42peering.portal.ISubRouter;
import moe.yuuta.dn42peering.whois.IWhoisService;
import moe.yuuta.dn42peering.whois.WhoisObject;
import org.apache.commons.text.RandomStringGenerator;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.util.*;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import static io.vertx.json.schema.common.dsl.Schemas.objectSchema;
import static io.vertx.json.schema.common.dsl.Schemas.stringSchema;
public class ASNHandler implements ISubRouter {
private final Logger logger = LoggerFactory.getLogger(getClass().getSimpleName());
@Nonnull
@Override
public Router mount(@Nonnull Vertx vertx) {
final IASNService asnService = IASNService.createProxy(vertx, IASNService.ADDRESS);
final IWhoisService whoisService = IWhoisService.createProxy(vertx, IWhoisService.ADDRESS);
// Preserve. We need to get email address out of it later.
final JsonObject mailConfig = vertx.getOrCreateContext().config().getJsonObject("mail");
final MailClient mailClient = MailClient.create(vertx, new MailConfig(mailConfig));
final TemplateEngine engine = FreeMarkerTemplateEngine.create(vertx, "ftlh");
final Router router = Router.router(vertx);
router.get("/")
.produces("text/html")
.handler(ctx -> {
renderIndex(engine, null, null, res -> {
if(res.succeeded()) {
ctx.response()
.putHeader(HttpHeaders.CONTENT_TYPE, "text/html")
.end(res.result());
} else {
ctx.fail(res.cause());
logger.error("Cannot render /asn.", res.cause());
}
});
});
final ObjectSchemaBuilder registerSchema = objectSchema()
.allowAdditionalProperties(false)
.requiredProperty("asn", stringSchema());
final SchemaParser parser = SchemaParser.createDraft7SchemaParser(
SchemaRouter.create(vertx, new SchemaRouterOptions()));
router.post().handler(BodyHandler.create().setBodyLimit(100 * 1024));
router.post("/")
.produces("text/html")
.handler(ValidationHandler
.builder(parser)
.body(Bodies.formUrlEncoded(registerSchema))
.predicate(RequestPredicate.BODY_REQUIRED)
.build())
.handler(ctx -> {
final JsonObject parameters = ctx.<RequestParameters>get(ValidationHandler.REQUEST_CONTEXT_KEY)
.body().getJsonObject();
final String upperASN = parameters.getString("asn").toUpperCase();
// Start: Check if the ASN exists.
Future.<Void>future(f -> asnService.exists(upperASN, true, true, ar -> {
if(ar.succeeded()) {
if(ar.result()) {
f.fail(new FormException("This ASN exists in our records. Please login instead of registering."));
} else {
f.complete();
}
} else {
f.fail(ar.cause());
}
}))
// Lookup ASN
.<WhoisObject>compose(exists ->
Future.future(f -> whoisService.query(upperASN, f)))
// Lookup emails
.<List<String>>compose(asnLookup -> {
if(asnLookup == null) {
return Future.failedFuture(new FormException("The ASN is not found in the DN42 registry."));
} else {
return Future.future(f -> asnService.lookupEmails(asnLookup, ar -> {
if(ar.succeeded()) {
if(ar.result().isEmpty()) {
f.fail(new FormException("The tech-c contact for this ASN does not have emails."));
} else {
f.complete(ar.result());
}
} else {
f.fail(ar.cause());
}
}));
}
})
// Generate random password and register.
.<Pair<String /* Random password */, List<String> /* Emails */>>compose(emails -> Future.future(f -> {
final String randomPassword = new RandomStringGenerator.Builder()
.withinRange('a', 'z')
.build()
.generate(15);
asnService.registerOrChangePassword(upperASN, randomPassword, ar -> {
if(ar.succeeded()) {
f.complete(new Pair<>(randomPassword, emails));
} else {
f.fail(ar.cause());
}
});
}))
// Send mails.
.compose(pair -> CompositeFuture.any(Stream.of(pair.b)
.map(mail -> new MailMessage()
.setFrom(mailConfig.getString("from"))
.setTo(mail)
.setText(String.format("Hi %s! Welcome to dn42 peering! Your peering initial password is %s. Make sure to change it.",
upperASN,
pair.a))
.setSubject("Peering initial password"))
.map(message -> Future.<MailResult>future(f -> mailClient.sendMail(message, f)))
.collect(Collectors.toList())))
// Render HTML or report errors
.onComplete(ar -> {
if(ar.succeeded()) {
// Get MailResult's out of the future.
final List<MailResult> sendRes = ar.result().list();
renderSuccess(engine, sendRes, res -> {
if(res.succeeded()) {
ctx.response()
.putHeader(HttpHeaders.CONTENT_TYPE, "text/html")
.end(res.result());
} else {
ctx.fail(res.cause());
logger.error("Cannot render /asn (success).", res.cause());
}
});
} else {
if(ar.cause() instanceof HTTPException) {
ctx.response().setStatusCode(((HTTPException) ar.cause()).code).end();
} else if(ar.cause() instanceof FormException) {
renderIndex(engine,
Arrays.asList(((FormException) ar.cause()).errors.clone()),
upperASN,
res -> {
if(res.succeeded()) {
ctx.response()
.putHeader(HttpHeaders.CONTENT_TYPE, "text/html")
.end(res.result());
} else {
ctx.fail(res.cause());
logger.error("Cannot render /asn (with errors).", res.cause());
}
});
} else {
logger.error(String.format("Cannot register ASN %s.", upperASN), ar.cause());
ctx.fail(ar.cause());
}
}
});
});
return router;
}
private void renderIndex(@Nonnull TemplateEngine engine,
@Nullable List<String> errors,
@Nullable String asn,
@Nonnull Handler<AsyncResult<Buffer>> handler) {
final Map<String, Object> root = new HashMap<>();
root.put("input_asn", asn == null ? "" : asn);
root.put("errors", errors);
engine.render(root, "asn/index.ftlh", handler);
}
private void renderSuccess(@Nonnull TemplateEngine engine,
@Nonnull List<MailResult> sendRes,
@Nonnull Handler<AsyncResult<Buffer>> handler) {
final Map<String, Object> root = new HashMap<>();
root.put("emails", sendRes.stream()
.filter(Objects::nonNull) // Nulls mean failures.
.flatMap(res -> res.getRecipients().stream())
.collect(Collectors.toList()));
engine.render(root, "asn/success.ftlh", handler);
}
}
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