package com.github.scribejava.apis.examples;

import com.github.scribejava.apis.SlackApi;

import com.github.scribejava.apis.slack.SlackOAuth2AccessToken;

import com.github.scribejava.core.builder.ServiceBuilder;

import com.github.scribejava.core.model.OAuth2AccessToken;

import com.github.scribejava.core.model.OAuthRequest;

import com.github.scribejava.core.model.Response;

import com.github.scribejava.core.model.Verb;

import com.github.scribejava.core.oauth.OAuth20Service;

import java.io.IOException;

import java.util.HashMap;

import java.util.Map;

import java.util.Scanner;

import java.util.concurrent.ExecutionException;

public class SlackExample {

private static final String NETWORK_NAME = "Slack.com";

private static final String BOT_RESOURCE_URL = "https://slack.com/api/channels.list";

private static final String BOT_SCOPE = "channels:read";

private static final String USER_RESOURCE_URL = "https://slack.com/api/users.list";

private static final String USER_SCOPE = "users:read";

private static final String PAYLOAD = "null";

private static final String CONTENT_TYPE_NAME = "Content-Type";

private static final String CONTENT_TYPE_VALUE = "application/json";

private SlackExample() {

}

@SuppressWarnings("PMD.SystemPrintln")

public static void main(String... args) throws IOException, InterruptedException, ExecutionException {

// Replace these with your client id and secret

final String clientId = "client-id";

final String clientSecret = "client-secret";

final OAuth20Service service = new ServiceBuilder(clientId)

.apiSecret(clientSecret)

.callback("https://www.example.com/oauth_callback/")

.defaultScope(BOT_SCOPE)

.build(SlackApi.instance());

final Scanner in = new Scanner(System.in);

System.out.println("=== " + NETWORK_NAME + "'s OAuth Workflow ===");

System.out.println();

// Obtain the Authorization URL

System.out.println("Fetching the Authorization URL...");

final Map<String, String> additionalParams = new HashMap<>();

// define user scope if any

additionalParams.put("user_scope", USER_SCOPE);

final String authorizationUrl = service.createAuthorizationUrlBuilder()

.additionalParams(additionalParams)

.build();

System.out.println("Got the Authorization URL!");

System.out.println("Now go and authorize ScribeJava here:");

System.out.println(authorizationUrl);

System.out.println("And paste the authorization code here");

System.out.print(">>");

final String code = in.nextLine();

System.out.println();

System.out.println("Trading the Authorization Code for an Access Token...");

final OAuth2AccessToken accessToken = service.getAccessToken(code);

System.out.println("Got the Access Token!");

System.out.println("(The raw response looks like this: " + accessToken.getRawResponse() + "')");

System.out.println();

System.out.println("Getting info using BOT token...");

final OAuthRequest request = new OAuthRequest(Verb.GET, BOT_RESOURCE_URL);

request.addHeader(CONTENT_TYPE_NAME, CONTENT_TYPE_VALUE);

request.setPayload(PAYLOAD);

service.signRequest(accessToken, request);

try (Response response = service.execute(request)) {

System.out.println("Got it! Lets see what we found...");

System.out.println();

System.out.println(response.getCode());

System.out.println(response.getBody());

System.out.println();

}

System.out.println("Getting info using USER token...");

final OAuthRequest userRequest = new OAuthRequest(Verb.GET, USER_RESOURCE_URL);

userRequest.addHeader(CONTENT_TYPE_NAME, CONTENT_TYPE_VALUE);

userRequest.setPayload(PAYLOAD);

final SlackOAuth2AccessToken token = (SlackOAuth2AccessToken) accessToken;

service.signRequest(token.getUserAccessToken(), userRequest);

try (Response response = service.execute(userRequest)) {

System.out.println("Got it! Lets see what we found...");

System.out.println();

System.out.println(response.getCode());

System.out.println(response.getBody());

}

System.out.println();

System.out.println("Thats it man! Go and build something awesome with ScribeJava! :)");

}

}