增加一些 get 方法，类似 cvrf

Signed-off-by: Jia Chao <jiac13@chinaunicom.cn>

src/lib.rs

@@ -54,6 +54,47 @@ impl CSAF {
         return ""
     }
 
+    /// 详细的公告描述信息
+    pub fn affected_component(&self) -> &str {
+        for note in &self.document.notes {
+            if note.title == "Affected Component" {
+                return &note.text
+            }
+        }
+
+        return ""
+    }
+
+    /// 受影响的产品列表
+    pub fn affected_products(&self) -> Vec<&Product> {
+        let mut products = vec![];
+        for product_branch in &self.product_tree.branches {
+            for branch in &product_branch.branches {
+                if &branch.name == "openEuler" {
+                    products.push(&branch.branches[0].product);
+                    break;
+                }
+            }
+        }
+
+        products
+    }
+
+    /// 已修复的 src 产品列表
+    pub fn fixed_srcs(&self) -> Vec<&Product> {
+        let mut srcs = vec![];
+        for product_branch in &self.product_tree.branches {
+            for branch in &product_branch.branches {
+                if &branch.name == "src" {
+                    srcs.push(&branch.branches[0].product);
+                    break;
+                }
+            }
+        }
+
+        srcs
+    }
+
     /// 安全公告所涉及的所有 CVE 的列表
     pub fn cves(&self) -> Vec<CVE> {
         let mut cves = vec![];