Optimize empty password checking

cli/src/cmd/arg/password.rs

@@ -2,7 +2,7 @@ use clap::{Arg, ArgMatches};
 
 use cmd::matcher::{MainMatcher, Matcher};
 use super::{CmdArg, CmdArgFlag, CmdArgOption};
-use util::{ErrorHintsBuilder, quit_error_msg, prompt_password};
+use util::{check_empty_password, prompt_password};
 
 /// The password argument.
 pub struct ArgPassword { }
@@ -44,17 +44,8 @@ impl<'a> CmdArgOption<'a> for ArgPassword {
             None => prompt_password(&matcher_main),
         };
 
-        // Do not allow empty passwords unless forced
-        if !matcher_main.force() && password.is_empty() {
-            quit_error_msg(
-                "An empty password is not supported by the web interface",
-                ErrorHintsBuilder::default()
-                    .force(true)
-                    .verbose(false)
-                    .build()
-                    .unwrap(),
-            )
-        }
+        // Check for empty passwords
+        check_empty_password(&password, &matcher_main);
 
         Some(password)
     }

cli/src/cmd/matcher/password.rs

@@ -3,7 +3,8 @@ use ffsend_api::url::Url;
 use rpassword::prompt_password_stderr;
 
 use cmd::arg::{ArgOwner, ArgPassword, ArgUrl, CmdArgOption};
-use super::Matcher;
+use cmd::matcher::{MainMatcher, Matcher};
+use util::check_empty_password;
 
 /// The password command matcher.
 pub struct PasswordMatcher<'a> {
@@ -30,7 +31,7 @@ impl<'a: 'b, 'b> PasswordMatcher<'a> {
     /// Get the password.
     pub fn password(&'a self) -> String {
         // Get the password, or prompt for it
-        match ArgPassword::value(self.matches) {
+        let password = match ArgPassword::value(self.matches) {
             Some(password) => password,
             None => {
                 // Prompt for the password
@@ -39,7 +40,15 @@ impl<'a: 'b, 'b> PasswordMatcher<'a> {
                 prompt_password_stderr("New password: ")
                     .expect("failed to read password from stdin")
             },
-        }
+        };
+
+        // Create a main matcher
+        let matcher_main = MainMatcher::with(self.matches).unwrap();
+
+        // Check for empty passwords
+        check_empty_password(&password, &matcher_main);
+
+        password
     }
 }
 

cli/src/util.rs

@@ -163,6 +163,23 @@ pub fn set_clipboard(content: String) -> Result<(), Box<StdError>> {
     context.set_contents(content)
 }
 
+/// Check for an emtpy password in the given `password`.
+/// If the password is emtpy the program will quit with an error unless
+/// forced.
+// TODO: move this to a better module
+pub fn check_empty_password(password: &str, matcher_main: &MainMatcher) {
+    if !matcher_main.force() && password.is_empty() {
+        quit_error_msg(
+            "An empty password is not supported by the web interface",
+            ErrorHintsBuilder::default()
+                .force(true)
+                .verbose(false)
+                .build()
+                .unwrap(),
+        )
+    }
+}
+
 /// Prompt the user to enter a password.
 ///
 /// If `empty` is `false`, emtpy passwords aren't allowed unless forced.