Add authentication

src/main/kotlin/top/fatweb/api/util/ApiVersionCondition.kt

@@ -0,0 +1,26 @@
+package top.fatweb.api.util
+
+import jakarta.servlet.http.HttpServletRequest
+import org.springframework.web.servlet.mvc.condition.RequestCondition
+import java.util.regex.Pattern
+
+class ApiVersionCondition(private val apiVersion: Int) : RequestCondition<ApiVersionCondition> {
+    private val versionPrefixPattern: Pattern = Pattern.compile(".*v(\\d+).*")
+
+    override fun combine(other: ApiVersionCondition): ApiVersionCondition = ApiVersionCondition(other.apiVersion)
+
+    override fun getMatchingCondition(request: HttpServletRequest): ApiVersionCondition? {
+        val matcher = versionPrefixPattern.matcher(request.requestURI)
+        if (matcher.find()) {
+            val version = matcher.group(1).toInt()
+            if (version >= this.apiVersion) {
+                return this
+            }
+        }
+
+        return null
+    }
+
+    override fun compareTo(other: ApiVersionCondition, request: HttpServletRequest): Int =
+        other.apiVersion - this.apiVersion
+}