update getting started guide and add llm gateway and prompt gateway samples (#330)

crates/common/src/path.rs

@@ -0,0 +1,82 @@
+use std::collections::HashMap;
+
+pub fn replace_params_in_path(path: &str, params: &HashMap<String, String>) -> Result<String, String> {
+    let mut result = String::new();
+    let mut in_param = false;
+    let mut current_param = String::new();
+
+    for c in path.chars() {
+        if c == '{' {
+            in_param = true;
+        } else if c == '}' {
+            in_param = false;
+            let param_name = current_param.clone();
+            if let Some(value) = params.get(&param_name) {
+                result.push_str(value);
+            } else {
+                return Err(format!("Missing value for parameter `{}`", param_name));
+            }
+            current_param.clear();
+        } else {
+            if in_param {
+                current_param.push(c);
+            } else {
+                result.push(c);
+            }
+        }
+    }
+
+    Ok(result)
+}
+
+#[cfg(test)]
+mod test {
+    #[test]
+    fn test_replace_path() {
+        let path = "/cluster.open-cluster-management.io/v1/managedclusters/{cluster_name}";
+        let params = vec![("cluster_name".to_string(), "test1".to_string())]
+            .into_iter()
+            .collect();
+        assert_eq!(
+            super::replace_params_in_path(path, &params),
+            Ok("/cluster.open-cluster-management.io/v1/managedclusters/test1".to_string())
+        );
+
+        let path = "/cluster.open-cluster-management.io/v1/managedclusters";
+        let params = vec![].into_iter().collect();
+        assert_eq!(
+            super::replace_params_in_path(path, &params),
+            Ok("/cluster.open-cluster-management.io/v1/managedclusters".to_string())
+        );
+
+        let path = "/foo/{bar}/baz";
+        let params = vec![("bar".to_string(), "qux".to_string())]
+            .into_iter()
+            .collect();
+        assert_eq!(
+            super::replace_params_in_path(path, &params),
+            Ok("/foo/qux/baz".to_string())
+        );
+
+        let path = "/foo/{bar}/baz/{qux}";
+        let params = vec![
+            ("bar".to_string(), "qux".to_string()),
+            ("qux".to_string(), "quux".to_string()),
+        ]
+        .into_iter()
+        .collect();
+        assert_eq!(
+            super::replace_params_in_path(path, &params),
+            Ok("/foo/qux/baz/quux".to_string())
+        );
+
+        let path = "/foo/{bar}/baz/{qux}";
+        let params = vec![("bar".to_string(), "qux".to_string())]
+            .into_iter()
+            .collect();
+        assert_eq!(
+            super::replace_params_in_path(path, &params),
+            Err("Missing value for parameter `qux`".to_string())
+        );
+    }
+}