fix default video save directory

Signed-off-by: 21pages <pages21@163.com>

src/platform/linux.rs

@@ -4,6 +4,7 @@ use hbb_common::{allow_err, bail, log};
 use libc::{c_char, c_int, c_void};
 use std::{
     cell::RefCell,
+    path::PathBuf,
     sync::{
         atomic::{AtomicBool, Ordering},
         Arc,
@@ -516,6 +517,17 @@ pub fn get_active_username() -> String {
     get_value_of_seat0(2)
 }
 
+pub fn get_active_user_home() -> Option<PathBuf> {
+    let username = get_active_username();
+    if !username.is_empty() {
+        let home = PathBuf::from(format!("/home/{}", username));
+        if home.exists() {
+            return Some(home);
+        }
+    }
+    None
+}
+
 pub fn is_prelogin() -> bool {
     let n = get_active_userid().len();
     n < 4 && n > 1

src/platform/macos.rs

@@ -20,6 +20,7 @@ use hbb_common::{bail, log};
 use include_dir::{include_dir, Dir};
 use objc::{class, msg_send, sel, sel_impl};
 use scrap::{libc::c_void, quartz::ffi::*};
+use std::path::PathBuf;
 
 static PRIVILEGES_SCRIPTS_DIR: Dir =
     include_dir!("$CARGO_MANIFEST_DIR/src/platform/privileges_scripts");
@@ -374,6 +375,17 @@ pub fn get_active_userid() -> String {
     get_active_user("-n")
 }
 
+pub fn get_active_user_home() -> Option<PathBuf> {
+    let username = get_active_username();
+    if !username.is_empty() {
+        let home = PathBuf::from(format!("/Users/{}", username));
+        if home.exists() {
+            return Some(home);
+        }
+    }
+    None
+}
+
 pub fn is_prelogin() -> bool {
     get_active_userid() == "0"
 }

src/platform/windows.rs

@@ -10,6 +10,7 @@ use std::io::prelude::*;
 use std::{
     ffi::{CString, OsString},
     fs, io, mem,
+    path::PathBuf,
     sync::{Arc, Mutex},
     time::{Duration, Instant},
 };
@@ -734,6 +735,18 @@ pub fn get_active_username() -> String {
         .to_owned()
 }
 
+pub fn get_active_user_home() -> Option<PathBuf> {
+    let username = get_active_username();
+    if !username.is_empty() {
+        let drive = std::env::var("SystemDrive").unwrap_or("C:".to_owned());
+        let home = PathBuf::from(format!("{}\\Users\\{}", drive, username));
+        if home.exists() {
+            return Some(home);
+        }
+    }
+    None
+}
+
 pub fn is_prelogin() -> bool {
     let username = get_active_username();
     username.is_empty() || username == "SYSTEM"