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/*********************************************************************************
 *                                                                               *
 * The MIT License                                                               *
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 * Copyright (c) 2015-2020 aoju.org and other contributors.                      *
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 * all copies or substantial portions of the Software.                           *
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package org.aoju.bus.oauth.provider;

import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.JSONPath;
import org.aoju.bus.cache.metric.ExtendCache;
import org.aoju.bus.core.lang.Normal;
import org.aoju.bus.core.lang.Symbol;
import org.aoju.bus.core.lang.exception.AuthorizedException;
import org.aoju.bus.core.utils.StringUtils;
import org.aoju.bus.http.Httpx;
import org.aoju.bus.oauth.Builder;
import org.aoju.bus.oauth.Context;
import org.aoju.bus.oauth.Registry;
import org.aoju.bus.oauth.magic.AccToken;
import org.aoju.bus.oauth.magic.Callback;
import org.aoju.bus.oauth.magic.Message;
import org.aoju.bus.oauth.magic.Property;

import java.util.HashMap;
import java.util.Map;

/**
 * 领英登录
 *
 * @author Kimi Liu
 * @version 5.9.2
 * @since JDK 1.8+
 */
public class LinkedinProvider extends DefaultProvider {

    public LinkedinProvider(Context context) {
        super(context, Registry.LINKEDIN);
    }

    public LinkedinProvider(Context context, ExtendCache extendCache) {
        super(context, Registry.LINKEDIN, extendCache);
    }

    @Override
    protected AccToken getAccessToken(Callback Callback) {
        return this.getToken(accessTokenUrl(Callback.getCode()));
    }

    @Override
    protected Property getUserInfo(AccToken token) {
        String accessToken = token.getAccessToken();

        Map header = new HashMap<>();
        header.put("Host", "api.linkedin.com");
        header.put("Connection", "Keep-Alive");
        header.put("Authorization", "Bearer " + accessToken);

        String response = Httpx.get(userInfoUrl(token), null, header);
        JSONObject object = JSONObject.parseObject(response);

        this.checkResponse(object);

        String userName = getUserName(object);

        // 获取用户头像
        String avatar = this.getAvatar(object);

        // 获取用户邮箱地址
        String email = this.getUserEmail(accessToken);
        return Property.builder()
                .uuid(object.getString("id"))
                .username(userName)
                .nickname(userName)
                .avatar(avatar)
                .email(email)
                .token(token)
                .gender(Normal.Gender.UNKNOWN)
                .source(source.toString())
                .build();
    }

    /**
     * 获取用户的真实名
     *
     * @param userInfoObject 用户json对象
     * @return 用户名
     */
    private String getUserName(JSONObject userInfoObject) {
        String firstName, lastName;
        // 获取firstName
        if (userInfoObject.containsKey("localizedFirstName")) {
            firstName = userInfoObject.getString("localizedFirstName");
        } else {
            firstName = getUserName(userInfoObject, "firstName");
        }
        // 获取lastName
        if (userInfoObject.containsKey("localizedLastName")) {
            lastName = userInfoObject.getString("localizedLastName");
        } else {
            lastName = getUserName(userInfoObject, "lastName");
        }
        return firstName + Symbol.SPACE + lastName;
    }

    /**
     * 获取用户的头像
     *
     * @param userInfoObject 用户json对象
     * @return 用户的头像地址
     */
    private String getAvatar(JSONObject userInfoObject) {
        String avatar = null;
        JSONObject profilePictureObject = userInfoObject.getJSONObject("profilePicture");
        if (profilePictureObject.containsKey("displayImage~")) {
            JSONArray displayImageElements = profilePictureObject.getJSONObject("displayImage~")
                    .getJSONArray("elements");
            if (null != displayImageElements && displayImageElements.size() > 0) {
                JSONObject largestImageObj = displayImageElements.getJSONObject(displayImageElements.size() - 1);
                avatar = largestImageObj.getJSONArray("identifiers").getJSONObject(0).getString("identifier");
            }
        }
        return avatar;
    }

    /**
     * 获取用户的email
     *
     * @param accessToken 用户授权后返回的token
     * @return 用户的邮箱地址
     */
    private String getUserEmail(String accessToken) {
        Map header = new HashMap<>();
        header.put("Host", "api.linkedin.com");
        header.put("Connection", "Keep-Alive");
        header.put("Authorization", "Bearer " + accessToken);

        String url = "https://api.linkedin.com/v2/emailAddress?q=members&projection=(elements*(handle~))";
        String response = Httpx.get(url, null, header);

        JSONObject object = JSONObject.parseObject(response);
        this.checkResponse(object);
        Object obj = JSONPath.eval(object, "$['elements'][0]['handle~']['emailAddress']");
        return null == obj ? null : (String) obj;
    }

    private String getUserName(JSONObject userInfoObject, String nameKey) {
        String firstName;
        JSONObject firstNameObj = userInfoObject.getJSONObject(nameKey);
        JSONObject localizedObj = firstNameObj.getJSONObject("localized");
        JSONObject preferredLocaleObj = firstNameObj.getJSONObject("preferredLocale");
        firstName = localizedObj.getString(preferredLocaleObj.getString("language") + Symbol.UNDERLINE + preferredLocaleObj.getString("country"));
        return firstName;
    }

    @Override
    public Message refresh(AccToken oldToken) {
        String refreshToken = oldToken.getRefreshToken();
        if (StringUtils.isEmpty(refreshToken)) {
            throw new AuthorizedException(Builder.ErrorCode.UNSUPPORTED.getCode());
        }
        String refreshTokenUrl = refreshTokenUrl(refreshToken);
        return Message.builder()
                .errcode(Builder.ErrorCode.SUCCESS.getCode())
                .data(this.getToken(refreshTokenUrl))
                .build();
    }

    /**
     * 检查响应内容是否正确
     *
     * @param object 请求响应内容
     */
    private void checkResponse(JSONObject object) {
        if (object.containsKey("error")) {
            throw new AuthorizedException(object.getString("error_description"));
        }
    }

    /**
     * 获取token,适用于获取access_token和刷新token
     *
     * @param accessTokenUrl 实际请求token的地址
     * @return token对象
     */
    private AccToken getToken(String accessTokenUrl) {
        Map header = new HashMap<>();
        header.put("Host", "www.linkedin.com");

        String response = Httpx.get(accessTokenUrl, null, header);
        JSONObject object = JSONObject.parseObject(response);

        this.checkResponse(object);

        return AccToken.builder()
                .accessToken(object.getString("access_token"))
                .expireIn(object.getIntValue("expires_in"))
                .refreshToken(object.getString("refresh_token"))
                .build();
    }

    /**
     * 返回带{@code state}参数的授权url,授权回调时会带上这个{@code state}
     *
     * @param state state 验证授权流程的参数,可以防止csrf
     * @return 返回授权地址
     */
    @Override
    public String authorize(String state) {
        return Builder.fromUrl(source.authorize())
                .queryParam("response_type", "code")
                .queryParam("client_id", context.getAppKey())
                .queryParam("redirect_uri", context.getRedirectUri())
                .queryParam("scope", "r_liteprofile%20r_emailaddress%20w_member_social")
                .queryParam("state", getRealState(state))
                .build();
    }

    /**
     * 返回获取userInfo的url
     *
     * @param token 用户授权后的token
     * @return 返回获取userInfo的url
     */
    @Override
    protected String userInfoUrl(AccToken token) {
        return Builder.fromUrl(source.userInfo())
                .queryParam("projection", "(id,firstName,lastName,profilePicture(displayImage~:playableStreams))")
                .build();
    }

}




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