From 43c1f67b33979d507415db669aaaa10e91eecd0b Mon Sep 17 00:00:00 2001
From: Tim <135014430+nagisa77@users.noreply.github.com>
Date: Wed, 30 Jul 2025 20:19:05 +0800
Subject: [PATCH] feat: add dynamic sitemap endpoint

---
 .../controller/SitemapController.java         | 67 +++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 src/main/java/com/openisle/controller/SitemapController.java

diff --git a/src/main/java/com/openisle/controller/SitemapController.java b/src/main/java/com/openisle/controller/SitemapController.java
new file mode 100644
index 000000000..32c316e3e
--- /dev/null
+++ b/src/main/java/com/openisle/controller/SitemapController.java
@@ -0,0 +1,67 @@
+package com.openisle.controller;
+
+import com.openisle.model.Post;
+import com.openisle.model.PostStatus;
+import com.openisle.repository.PostRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.List;
+
+/**
+ * Controller for dynamic sitemap generation.
+ */
+@RestController
+@RequiredArgsConstructor
+public class SitemapController {
+    private final PostRepository postRepository;
+
+    @Value("${app.website-url:https://www.open-isle.com}")
+    private String websiteUrl;
+
+    @GetMapping(value = "/sitemap.xml", produces = MediaType.APPLICATION_XML_VALUE)
+    public ResponseEntity<String> sitemap() {
+        List<Post> posts = postRepository.findByStatus(PostStatus.PUBLISHED);
+
+        StringBuilder body = new StringBuilder();
+        body.append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");
+        body.append("<urlset xmlns=\"http://www.sitemaps.org/schemas/sitemap/0.9\">\n");
+
+        List<String> staticRoutes = List.of(
+                "/",
+                "/about",
+                "/activities",
+                "/login",
+                "/signup"
+        );
+
+        for (String path : staticRoutes) {
+            body.append("  <url><loc>")
+                .append(websiteUrl)
+                .append(path)
+                .append("</loc></url>\n");
+        }
+
+        for (Post p : posts) {
+            body.append("  <url>\n")
+                .append("    <loc>")
+                .append(websiteUrl)
+                .append("/posts/")
+                .append(p.getId())
+                .append("</loc>\n")
+                .append("    <lastmod>")
+                .append(p.getCreatedAt())
+                .append("</lastmod>\n")
+                .append("  </url>\n");
+        }
+
+        body.append("</urlset>");
+        return ResponseEntity.ok()
+                .contentType(MediaType.APPLICATION_XML)
+                .body(body.toString());
+    }
+}