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Cloud Foundry User Account and Authentication (UAA) Server
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/*******************************************************************************
 * Cloud Foundry
 * Copyright (c) [2009-2015] Pivotal Software, Inc. All Rights Reserved.
 * 
 * This product is licensed to you under the Apache License, Version 2.0 (the "License").
 * You may not use this product except in compliance with the License.
 * 
 * This product includes a number of subcomponents with
 * separate copyright notices and license terms. Your use of these
 * subcomponents is subject to the terms and conditions of the
 * subcomponent's license, as noted in the LICENSE file.
 *******************************************************************************/

package org.cloudfoundry.identity.uaa.zone;

import com.fasterxml.jackson.annotation.*;
import org.cloudfoundry.identity.uaa.oauth.token.TokenConstants;
import org.springframework.util.StringUtils;

import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collector;
import java.util.stream.Collectors;

import static org.cloudfoundry.identity.uaa.oauth.token.TokenConstants.TokenFormat.JWT;

@JsonIgnoreProperties(ignoreUnknown = true)
public class TokenPolicy {
    private static final Collector, ?, ? extends Map> outputCollector = Collectors.toMap(e -> e.getKey(), e -> {
        KeyInformation keyInformation = new KeyInformation();
        keyInformation.setSigningKey(e.getValue());
        return keyInformation;
    });
    private static final Collector, ?, ? extends Map> inputCollector
        = Collectors.toMap(e -> e.getKey(), e -> e.getValue().getSigningKey());

    private int accessTokenValidity;
    private int refreshTokenValidity;
    private boolean jwtRevocable = false;
    private boolean refreshTokenUnique = false;
    private String refreshTokenFormat = JWT.getStringValue();

    @JsonGetter("keys")
    @JsonInclude(JsonInclude.Include.NON_NULL)
    private Map getKeysLegacy() {
        Map keys = getKeys();
        return (keys == null || keys.isEmpty()) ? null : keys.entrySet().stream().collect(outputCollector);
    }

    @JsonSetter("keys")
    private void setKeysLegacy(Map keys) {
        setKeys(keys == null ? null : keys.entrySet().stream().collect(inputCollector));
    }

    private Map keys;
    private String activeKeyId;

    public TokenPolicy() {
        accessTokenValidity = refreshTokenValidity = -1;
    }

    public TokenPolicy(int accessTokenValidity, int refreshTokenValidity) {
        this.accessTokenValidity = accessTokenValidity;
        this.refreshTokenValidity = refreshTokenValidity;
    }

    public TokenPolicy(int accessTokenValidity, int refreshTokenValidity, Map> signingKeysMap) {
        this(accessTokenValidity, refreshTokenValidity);
        setKeysLegacy(signingKeysMap.entrySet().stream().collect(Collectors.toMap(e -> e.getKey(), e -> {
            KeyInformation keyInformation = new KeyInformation();
            keyInformation.setSigningKey(e.getValue().get("signingKey"));
            return keyInformation;
        })));
    }

    public int getAccessTokenValidity() {
        return accessTokenValidity;
    }

    public void setAccessTokenValidity(int accessTokenValidity) {
        this.accessTokenValidity = accessTokenValidity;
    }

    public int getRefreshTokenValidity() {
        return refreshTokenValidity;
    }

    public void setRefreshTokenValidity(int refreshTokenValidity) {
        this.refreshTokenValidity = refreshTokenValidity;
    }

    @JsonIgnore
    public Map getKeys() {
        return this.keys == null ? Collections.EMPTY_MAP : new HashMap<>(this.keys);
    }

    @JsonIgnore
    public void setKeys(Map keys) {
        if (keys != null) {
            keys.entrySet().stream().forEach(e -> {
                if (!StringUtils.hasText(e.getValue()) || !StringUtils.hasText(e.getKey())) {
                    throw new IllegalArgumentException("KeyId and Signing key should not be null or empty");
                }
            });
        }
        this.keys = keys == null ? null : new HashMap<>(keys);
    }

    public boolean isRefreshTokenUnique() {
        return refreshTokenUnique;
    }

    public void setRefreshTokenUnique(boolean refreshTokenUnique) {
        this.refreshTokenUnique = refreshTokenUnique;
    }

    public String getRefreshTokenFormat() {
        return refreshTokenFormat;
    }

    public void setRefreshTokenFormat(String refreshTokenFormat) {
        if(TokenConstants.TokenFormat.fromStringValue(refreshTokenFormat) == null) {
            List validFormats = TokenConstants.TokenFormat.getStringValues();
            String message = String.format("Invalid refresh token format %s. Acceptable values are: %s", refreshTokenFormat, validFormats.toString());
            throw new IllegalArgumentException(message);
        }
        this.refreshTokenFormat = refreshTokenFormat.toLowerCase();
    }

    @JsonIgnoreProperties(ignoreUnknown = true)
    private static class KeyInformation {
        private String signingKey;

        public String getSigningKey() {
            return signingKey;
        }

        public void setSigningKey(String signingKey) {
            this.signingKey = signingKey;
        }
    }

    public String getActiveKeyId() {
        return activeKeyId;
    }

    public void setActiveKeyId(String activeKeyId) {
        this.activeKeyId = activeKeyId;
    }

    public boolean isJwtRevocable() {
        return jwtRevocable;
    }

    public void setJwtRevocable(boolean jwtRevocable) {
        this.jwtRevocable = jwtRevocable;
    }
}