feat: add authorize redirection

1 files changed, 28 insertions, 0 deletions

diff --git a/src/main/java/moe/nea/prickly/util/QueryParameterHelper.java b/src/main/java/moe/nea/prickly/util/QueryParameterHelper.java
new file mode 100644
index 0000000..191dae8
--- /dev/null
+++ b/src/main/java/moe/nea/prickly/util/QueryParameterHelper.java
@@ -0,0 +1,28 @@
+/* (C) 2025 Linnea Gräf - Licensed to everyone under the BSD 3 Clause License */
+package moe.nea.prickly.util;
+
+import com.google.common.net.UrlEscapers;
+import java.net.URI;
+import java.util.Map;
+import org.jspecify.annotations.Nullable;
+
+public class QueryParameterHelper {
+	public static URI appendQuery(URI uri, Map<String, @Nullable String> extraArgs) {
+		var uriBuilder = new StringBuilder();
+		uriBuilder.append(uri);
+		var escaper = UrlEscapers.urlFormParameterEscaper();
+		var first = true;
+		for (var entry : extraArgs.entrySet()) {
+			if (entry.getValue() == null) continue;
+			if (first) {
+				char c = uriBuilder.charAt(uriBuilder.length() - 1);
+				if (c != '?' && c != '&') uriBuilder.append((uri.getQuery() == null) ? '?' : '&');
+				first = false;
+			} else {
+				uriBuilder.append('&');
+			}
+			uriBuilder.append(escaper.escape(entry.getKey())).append('=').append(escaper.escape(entry.getValue()));
+		}
+		return URI.create(uriBuilder.toString());
+	}
+}