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/*
* Copyright 2017 Lukáš Petrovický
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.github.triceo.robozonky.app.investing;
import java.time.OffsetDateTime;
import java.util.Optional;
import java.util.function.Function;
import javax.ws.rs.ServiceUnavailableException;
import com.github.triceo.robozonky.api.confirmations.Confirmation;
import com.github.triceo.robozonky.api.confirmations.ConfirmationProvider;
import com.github.triceo.robozonky.api.confirmations.RequestId;
import com.github.triceo.robozonky.api.remote.ZonkyApi;
import com.github.triceo.robozonky.api.remote.entities.Investment;
import com.github.triceo.robozonky.api.strategies.Recommendation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class ZonkyProxy {
private static final Logger LOGGER = LoggerFactory.getLogger(ZonkyProxy.class);
public static final class Builder {
private String username = "";
private boolean isDryRun = false;
private ConfirmationProvider provider;
private RequestId requestId;
public ZonkyProxy.Builder usingConfirmation(final ConfirmationProvider provider, final String username,
final char... password) {
this.provider = provider;
this.requestId = new RequestId(username, password);
return this;
}
public ZonkyProxy.Builder asUser(final String username) {
this.username = username;
return this;
}
public ZonkyProxy.Builder asDryRun() {
this.isDryRun = true;
return this;
}
public boolean isDryRun() {
return isDryRun;
}
public ZonkyProxy build(final ZonkyApi zonky) {
if (this.provider == null) {
return new ZonkyProxy(username, zonky, isDryRun);
} else {
return new ZonkyProxy(username, zonky, provider, requestId, isDryRun);
}
}
}
static Investment convertToInvestment(final Recommendation r, final Confirmation confirmation) {
final int amount = (confirmation == null || !confirmation.getAmount().isPresent()) ?
r.getRecommendedInvestmentAmount() :
confirmation.getAmount().getAsInt();
return new Investment(r.getLoanDescriptor().getLoan(), amount);
}
private final String username;
private final ZonkyApi zonky;
private final boolean isDryRun;
private final RequestId requestId;
private final ConfirmationProvider provider;
private ZonkyProxy(final String username, final ZonkyApi zonky, final ConfirmationProvider provider,
final RequestId requestId, final boolean isDryRun) {
this.username = username;
this.zonky = zonky;
this.isDryRun = isDryRun;
this.provider = provider;
this.requestId = requestId;
}
public boolean isDryRun() {
return isDryRun;
}
private ZonkyProxy(final String username, final ZonkyApi zonky, final boolean isDryRun) {
this(username, zonky, null, null, isDryRun);
}
public T execute(final Function operation) {
return operation.apply(this.zonky);
}
public String getUsername() {
return this.username;
}
public Optional getConfirmationProviderId() {
return (this.provider == null) ? Optional.empty() : Optional.of(this.provider.getId());
}
public ZonkyResponse invest(final Recommendation recommendation, final boolean alreadySeenBefore) {
if (this.isDryRun) {
ZonkyProxy.LOGGER.debug("Dry run. Otherwise would attempt investing: {}.", recommendation);
return new ZonkyResponse(recommendation.getRecommendedInvestmentAmount());
} else if (alreadySeenBefore) {
ZonkyProxy.LOGGER.debug("Loan seen before.");
final boolean protectedByCaptcha = recommendation.getLoanDescriptor().getLoanCaptchaProtectionEndDateTime()
.map(date -> OffsetDateTime.now().isBefore(date))
.orElse(false);
final boolean confirmationRequired = recommendation.isConfirmationRequired();
if (!protectedByCaptcha && !confirmationRequired) {
/*
* investment is no longer protected by CAPTCHA and no confirmation is required. therefore we invest.
*/
return this.investLocallyFailingOnCaptcha(recommendation);
} else {
/*
* protected by captcha or confirmation required. yet already seen from a previous investment session.
* this must mean that the previous response was DELEGATED and the user did not respond in the
* meantime. we therefore keep the investment as delegated.
*/
return new ZonkyResponse(ZonkyResponseType.SEEN_BEFORE);
}
} else {
if (recommendation.isConfirmationRequired()) {
if (this.provider == null) {
throw new IllegalStateException("Confirmation required but no confirmation provider specified.");
} else {
return this.approveOrDelegate(recommendation);
}
} else {
return this.investOrDelegateOnCaptcha(recommendation);
}
}
}
private ZonkyResponse investLocallyFailingOnCaptcha(final Recommendation recommendation, final Confirmation confirmation) {
ZonkyProxy.LOGGER.debug("Executing investment: {}, confirmation: {}.", recommendation, confirmation);
final Investment i = ZonkyProxy.convertToInvestment(recommendation, confirmation);
this.zonky.invest(i);
ZonkyProxy.LOGGER.debug("Investment succeeded.");
return new ZonkyResponse(i.getAmount());
}
private ZonkyResponse investLocallyFailingOnCaptcha(final Recommendation recommendation) {
return this.investLocallyFailingOnCaptcha(recommendation, null);
}
ZonkyResponse investOrDelegateOnCaptcha(final Recommendation recommendation) {
final Optional captchaEndDateTime =
recommendation.getLoanDescriptor().getLoanCaptchaProtectionEndDateTime();
final boolean isCaptchaProtected = captchaEndDateTime.isPresent() &&
captchaEndDateTime.get().isAfter(OffsetDateTime.now());
final boolean confirmationSupported = this.provider != null;
if (!isCaptchaProtected) {
return this.investLocallyFailingOnCaptcha(recommendation);
} else if (confirmationSupported) {
return this.delegateOrReject(recommendation);
}
ZonkyProxy.LOGGER.warn("CAPTCHA protected, no support for delegation. Not investing: {}.", recommendation);
return new ZonkyResponse(ZonkyResponseType.REJECTED);
}
ZonkyResponse approveOrDelegate(final Recommendation recommendation) {
ZonkyProxy.LOGGER.debug("Asking to confirm investment: {}.", recommendation);
final Optional confirmation = this.provider.requestConfirmation(this.requestId,
recommendation.getLoanDescriptor().getLoan().getId(),
recommendation.getRecommendedInvestmentAmount());
return confirmation.map(result -> {
switch (result.getType()) {
case REJECTED:
ZonkyProxy.LOGGER.debug("Negative confirmation received, not investing: {}.", recommendation);
return new ZonkyResponse(ZonkyResponseType.REJECTED);
case DELEGATED:
ZonkyProxy.LOGGER.debug("Investment confirmed delegated, not investing: {}.", recommendation);
return new ZonkyResponse(ZonkyResponseType.DELEGATED);
case APPROVED:
return this.investLocallyFailingOnCaptcha(recommendation, confirmation.get());
default:
throw new IllegalStateException("No way how this could happen.");
}}).orElseThrow(() -> new ServiceUnavailableException("Confirmation provider did not respond."));
}
private ZonkyResponse delegateOrReject(final Recommendation recommendation) {
ZonkyProxy.LOGGER.debug("Asking to confirm investment: {}.", recommendation);
final Optional confirmation = this.provider.requestConfirmation(this.requestId,
recommendation.getLoanDescriptor().getLoan().getId(),
recommendation.getRecommendedInvestmentAmount());
return confirmation.map(result -> {
switch (result.getType()) {
case DELEGATED:
ZonkyProxy.LOGGER.debug("Investment confirmed delegated, not investing: {}.", recommendation);
return new ZonkyResponse(ZonkyResponseType.DELEGATED);
default:
ZonkyProxy.LOGGER.warn("Investment not delegated, not investing: {}.", recommendation);
return new ZonkyResponse(ZonkyResponseType.REJECTED);
}}).orElseThrow(() -> new ServiceUnavailableException("Confirmation provider did not respond"));
}
}
