mark solution with Answer Overflow when users are thanked by OP

Author: danthe1st

src/main/java/net/discordjug/javabot/data/config/SystemsConfig.java

@@ -24,6 +24,11 @@ public class SystemsConfig {
 	 * The Key used for the bing-search-api.
 	 */
 	private String azureSubscriptionKey = "";
+	
+	/**
+	 * The API key of the Answer Overflow API.
+	 */
+	private String answerOverflowApiKey = "";
 
 	/**
 	 * The DSN for the Sentry API.

src/main/java/net/discordjug/javabot/systems/help/AnswerOverflowService.java

@@ -0,0 +1,50 @@
+package net.discordjug.javabot.systems.help;
+
+import java.io.IOException;
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpRequest.BodyPublishers;
+import java.net.http.HttpResponse;
+import java.net.http.HttpResponse.BodyHandlers;
+
+import lombok.extern.slf4j.Slf4j;
+import net.discordjug.javabot.data.config.BotConfig;
+import org.springframework.stereotype.Service;
+
+@Service
+@Slf4j
+public class AnswerOverflowService {
+	private final String apiKey;
+	
+	public AnswerOverflowService(BotConfig config) {
+		apiKey = config.getSystems().getAnswerOverflowApiKey();
+	}
+	
+	public void markAnswer(long postId, long messageId) {
+		if (apiKey == null || apiKey.isBlank()) {
+			return;
+		}
+		
+		try (HttpClient client = HttpClient.newHttpClient()) {
+			HttpResponse<String> response = client.send(
+					HttpRequest.newBuilder(URI.create("https://www.answeroverflow.com/api/v1/messages/" + postId))
+						.header("x-api-key", apiKey)
+						.header("Content-Type", "application/json")
+						.POST(BodyPublishers.ofString("""
+								{
+								  "solutionId": "%d"
+								}
+								""".formatted(messageId)))
+					.build(),
+					BodyHandlers.ofString());
+			if (response.statusCode() != 200) {
+				log.warn("Answer Overflow responded with unexpected status code {}, post ID: {}, message ID: {}, body: {}", response.statusCode(), postId, messageId, response.body());
+			}
+		} catch (IOException e) {
+			log.error("An exception occured trying to mark a post as an answer.", e);
+		} catch (InterruptedException e) {
+			Thread.currentThread().interrupt();
+		};
+	}
+}

src/main/java/net/discordjug/javabot/systems/help/HelpListener.java

@@ -30,6 +30,7 @@
 import xyz.dynxsty.dih4jda.util.ComponentIdBuilder;
 
 import java.util.*;
+import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
 /**
@@ -79,6 +80,7 @@ protected boolean removeEldestEntry(Map.Entry<Long, Long> eldest) {
 			return System.currentTimeMillis() > eldest.getValue() || size() >= 32;
 		}
 	};
+	private final AnswerOverflowService answerOverflowService;
 
 	@Override
 	public void onMessageReceived(@NotNull MessageReceivedEvent event) {
@@ -121,12 +123,8 @@ public void onMessageReceived(@NotNull MessageReceivedEvent event) {
 			return;
 		}
 		// cache messages
-		List<Message> messages = new ArrayList<>();
-		messages.add(event.getMessage());
-		if (HELP_POST_MESSAGES.containsKey(post.getIdLong())) {
-			messages.addAll(HELP_POST_MESSAGES.get(post.getIdLong()));
-		}
-		HELP_POST_MESSAGES.put(post.getIdLong(), messages);
+		HELP_POST_MESSAGES.computeIfAbsent(post.getIdLong(), _ -> new ArrayList<>())
+			.add(event.getMessage());
 		// suggest to close post on "problem solved"-messages
 		replyCloseSuggestionIfPatternMatches(event.getMessage());
 	}
@@ -291,17 +289,34 @@ private void handleThanksCloseButton(@NotNull ButtonInteractionEvent event, Help
 		event.getMessage().delete().queue(s -> {
 			experienceService.addMessageBasedHelpXP(post, true);
 			// thank all helpers
-			getButtonStream(event.getMessage())
-					.filter(b -> b.getCustomId() != null)
-					.filter(b -> b.isDisabled() || (b.getCustomId().equals(additionalButtonId)))
-					.forEach(b -> manager.thankHelper(
-							event.getGuild(),
-							post,
-							Long.parseLong(ComponentIdBuilder.split(b.getCustomId())[2])
-					));
+			
+			Set<Long> helpersToThank = getButtonStream(event.getMessage())
+				.filter(b -> b.getCustomId() != null)
+				.filter(b -> b.isDisabled() || (b.getCustomId().equals(additionalButtonId)))
+				.map(b -> Long.parseLong(ComponentIdBuilder.split(b.getCustomId())[2]))
+				.collect(Collectors.toSet());
+			
+			for (Long helperId : helpersToThank) {
+				manager.thankHelper(event.getGuild(), post, helperId);
+			}
+			markAnswer(post, helpersToThank);
+			HELP_POST_MESSAGES.remove(post.getIdLong());
 		});
 	}
 
+	private void markAnswer(ThreadChannel post, Set<Long> helpers) {
+		List<Message> messages = HELP_POST_MESSAGES.get(post.getIdLong());
+		if (messages == null) {
+			return;
+		}
+		for (Message msg : messages.reversed()) {
+			if (helpers.contains(msg.getAuthor().getIdLong())) {
+				answerOverflowService.markAnswer(post.getIdLong(), msg.getIdLong());
+				return;
+			}
+		}
+	}
+
 	private void handleReplyGuidelines(@NotNull IReplyCallback callback, @NotNull ForumChannel channel) {
 		callback.replyEmbeds(new EmbedBuilder().setTitle("Help Guidelines")
 				.setDescription(channel.getTopic())