matchを使わない形に修正

src/detections/detection.rs

@@ -8,7 +8,6 @@ use crate::models::event;
 use evtx::EvtxParser;
 use quick_xml::de::DeError;
 use std::collections::BTreeMap;
-use std::collections::HashMap;
 
 #[derive(Debug)]
 pub struct Detection {

src/detections/security.rs

@@ -42,10 +42,9 @@ impl Security {
     // Special privileges assigned to new logon (possible admin access)
     //
     fn se_debug_privilege(&mut self, event_data: HashMap<String, String>) {
-        match event_data.get("PrivilegeList") {
-            Some(privileage_list) => {
-                match privileage_list.find("SeDebugPrivilege") {
-                    Some(_data) => {
+
+        if let Some(privileage_list) = event_data.get("PrivilegeList") {
+            if let Some(_data) = privileage_list.find("SeDebugPrivilege") {
                 // alert_all_adminが有効であれば、標準出力して知らせる
                 // DeepBlueCLIでは必ず0になっていて、基本的には表示されない。
                 if self.alert_all_admin == 1 {
@@ -88,10 +87,6 @@ impl Security {
                     }
                 }
             }
-                    None => (),
-                }
-            }
-            None => (),
         }
     }
 }

src/main.rs

@@ -4,7 +4,7 @@ extern crate serde;
 use clap::{App, AppSettings, Arg};
 use evtx::EvtxParser;
 use quick_xml::de::DeError;
-use std::{env, path::PathBuf, process};
+use std::{path::PathBuf, process};
 use yamato_event_analyzer::detections::detection;
 
 fn build_app() -> clap::App<'static, 'static> {
@@ -38,9 +38,8 @@ fn main() -> Result<(), DeError> {
     let args = build_app().get_matches();
     let filepath: Option<&str> = args.value_of("filepath");
 
-    match filepath {
-        Some(filepath) => parse_file(filepath),
-        None => (),
+    if let Some(filepath) = filepath {
+        parse_file(filepath);
     }
 
     Ok(())

src/models/event.rs

@@ -85,12 +85,11 @@ impl Evtx {
     // 文字列データを取得する
     //
     fn get_string(v: &Data) -> String {
-        match &v.text {
-            Some(text) => {
-                return text.to_string();
-            }
-            _ => return "".to_string(),
+        let mut ret = "".to_string();
+        if let Some(text) = &v.text {
+            ret = text.to_string();
         }
+        return ret;
     }
 
     //
@@ -99,22 +98,15 @@ impl Evtx {
     pub fn parse_event_data(&self) -> HashMap<String, String> {
         let mut values = HashMap::new();
 
-        match &self.event_data {
-            Some(event_data) => match &event_data.data {
-                Some(data) => {
+        if let Some(event_data) = &self.event_data {
+            if let Some(data) = &event_data.data {
                 for v in data.iter() {
-                        match &v.name {
-                            Some(name) => {
+                    if let Some(name) = &v.name {
                         values.insert(name.to_string(), Evtx::get_string(v));
                     }
-                            None => (),
                 }
             }
         }
-                None => (),
-            },
-            None => (),
-        }
 
         values
     }