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Lines changed: 23 additions & 35 deletions

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application/src/main/java/org/togetherjava/tjbot/features/utils/LinkDetection.java

Lines changed: 23 additions & 35 deletions
Original file line numberDiff line numberDiff line change
@@ -1,18 +1,17 @@
11
package org.togetherjava.tjbot.features.utils;
22

3-
import java.net.URI;
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import java.net.http.HttpClient;
5-
import java.net.http.HttpRequest;
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import java.net.http.HttpResponse;
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import java.util.concurrent.CompletableFuture;
8-
93
import com.linkedin.urls.Url;
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import com.linkedin.urls.detection.UrlDetector;
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import com.linkedin.urls.detection.UrlDetectorOptions;
126

7+
import java.net.URI;
8+
import java.net.http.HttpClient;
9+
import java.net.http.HttpRequest;
10+
import java.net.http.HttpResponse;
1311
import java.util.List;
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import java.util.Optional;
1513
import java.util.Set;
14+
import java.util.concurrent.CompletableFuture;
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/**
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* Utility class to detect links.
@@ -63,25 +62,21 @@ public static List<String> extractLinks(String content, Set<LinkFilter> filter)
6362
public static boolean containsLink(String content) {
6463
return !(new UrlDetector(content, UrlDetectorOptions.BRACKET_MATCH).detect().isEmpty());
6564
}
65+
6666
public static CompletableFuture<Boolean> isLinkBroken(String url) {
6767
HttpClient client = HttpClient.newHttpClient();
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6969
HttpRequest request = HttpRequest.newBuilder(URI.create(url))
70-
.method("HEAD", HttpRequest.BodyPublishers.noBody())
71-
.build();
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.method("HEAD", HttpRequest.BodyPublishers.noBody())
71+
.build();
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7373
return client.sendAsync(request, HttpResponse.BodyHandlers.discarding())
74-
.thenApply(response -> response.statusCode() >= 400)
75-
.exceptionally(ignored -> true);
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.thenApply(response -> response.statusCode() >= 400)
75+
.exceptionally(ignored -> true);
7676
}
77-
public static CompletableFuture<String> replaceDeadLinks(
78-
String text,
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String replacement
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) {
81-
Set<LinkFilter> filters = Set.of(
82-
LinkFilter.SUPPRESSED,
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LinkFilter.NON_HTTP_SCHEME
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);
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78+
public static CompletableFuture<String> replaceDeadLinks(String text, String replacement) {
79+
Set<LinkFilter> filters = Set.of(LinkFilter.SUPPRESSED, LinkFilter.NON_HTTP_SCHEME);
8580

8681
List<String> links = extractLinks(text, filters);
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@@ -91,25 +86,18 @@ public static CompletableFuture<String> replaceDeadLinks(
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9287
StringBuilder result = new StringBuilder(text);
9388

94-
List<CompletableFuture<Void>> checks = links.stream()
95-
.map(link ->
96-
isLinkBroken(link).thenAccept(isDead -> {
97-
if (isDead) {
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int index = result.indexOf(link);
99-
if (index != -1) {
100-
result.replace(
101-
index,
102-
index + link.length(),
103-
replacement
104-
);
105-
}
106-
}
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})
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)
109-
.toList();
89+
List<CompletableFuture<Void>> checks =
90+
links.stream().map(link -> isLinkBroken(link).thenAccept(isDead -> {
91+
if (isDead) {
92+
int index = result.indexOf(link);
93+
if (index != -1) {
94+
result.replace(index, index + link.length(), replacement);
95+
}
96+
}
97+
})).toList();
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11199
return CompletableFuture.allOf(checks.toArray(new CompletableFuture[0]))
112-
.thenApply(v -> result.toString());
100+
.thenApply(v -> result.toString());
113101
}
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115103
private static Optional<String> toLink(Url url, Set<LinkFilter> filter) {

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