Add an interactive "shell" mode of operation to avoid having to type in the password many times

src/main.rs

@@ -1,7 +1,7 @@
 use crypto::hmac::Hmac;
 use crypto::mac::{Mac, MacResult};
 use crypto::sha2::Sha256;
-use dialoguer::{theme::ColorfulTheme, Input, PasswordInput};
+use dialoguer::{theme::ColorfulTheme, Input, PasswordInput, Select};
 use docopt::Docopt;
 use log::debug;
 use rand::rngs::OsRng;
@@ -21,6 +21,7 @@ Usage:
   foil set [--namespace=<ns>] [--db=<db>]
   foil get [--namespace=<ns>] [--db=<db>]
   foil list [--namespace=<ns>] [--db=<db>]
+  foil shell [--namespace=<ns>] [--db=<db>]
   foil dump [--db=<db>]
   foil generate <spec>
   foil (-h | --help)
@@ -40,6 +41,7 @@ struct Args {
     cmd_list: bool,
     cmd_generate: bool,
     cmd_dump: bool,
+    cmd_shell: bool,
     flag_db: Option<String>,
     flag_src: Option<String>,
     flag_namespace: String,
@@ -92,7 +94,7 @@ fn get_master_key(db_conn: &mut db::DbHandle) -> [u8; 32] {
     master_key
 }
 
-fn list(mut db_conn: db::DbHandle, master_key: [u8; 32], namespace: &str) {
+fn list(db_conn: &mut db::DbHandle, master_key: [u8; 32], namespace: &str) {
     for note in db_conn.read_notes(master_key).unwrap() {
         if note.namespace == namespace && note.category == "account" {
             println!("{}", note.title);
@@ -100,7 +102,7 @@ fn list(mut db_conn: db::DbHandle, master_key: [u8; 32], namespace: &str) {
     }
 }
 
-fn get(mut db_conn: db::DbHandle, master_key: [u8; 32], namespace: &str) {
+fn get(db_conn: &mut db::DbHandle, master_key: [u8; 32], namespace: &str) {
     println!("Reading a site from the database");
     let host: String = Input::with_theme(&ColorfulTheme::default())
         .with_prompt("hostname")
@@ -118,7 +120,7 @@ fn get(mut db_conn: db::DbHandle, master_key: [u8; 32], namespace: &str) {
     }
 }
 
-fn set(mut db_conn: db::DbHandle, master_key: [u8; 32], namespace: &str) {
+fn set(db_conn: &mut db::DbHandle, master_key: [u8; 32], namespace: &str) {
     println!("Adding a site to the database");
     let host: String = Input::with_theme(&ColorfulTheme::default())
         .with_prompt("hostname")
@@ -146,7 +148,7 @@ fn set(mut db_conn: db::DbHandle, master_key: [u8; 32], namespace: &str) {
     println!("Successfully added password");
 }
 
-fn dump(mut db_conn: db::DbHandle, master_key: [u8; 32]) {
+fn dump(db_conn: &mut db::DbHandle, master_key: [u8; 32]) {
     for note in db_conn.read_notes(master_key).unwrap() {
         println!("===== note =====");
         println!("namespace: {}", note.namespace);
@@ -156,6 +158,37 @@ fn dump(mut db_conn: db::DbHandle, master_key: [u8; 32]) {
     }
 }
 
+fn shell_generate() {
+    let spec: String = Input::with_theme(&ColorfulTheme::default())
+        .with_prompt("Password Spec")
+        .default("30,AAAa111..".to_owned())
+        .interact()
+        .unwrap();
+
+    generate::generate(&spec);
+}
+
+fn shell(db_conn: &mut db::DbHandle, master_key: [u8; 32], namespace: &str) {
+    loop {
+        let selections = &["get", "list", "set", "generate", "exit"];
+
+        let selection = Select::with_theme(&ColorfulTheme::default())
+            .with_prompt("Main Menu")
+            .default(0)
+            .items(&selections[..])
+            .interact()
+            .unwrap();
+        match selections[selection] {
+            "get" => get(db_conn, master_key, namespace),
+            "list" => list(db_conn, master_key, namespace),
+            "set" => set(db_conn, master_key, namespace),
+            "generate" => shell_generate(),
+            "exit" => break,
+            _ => panic!("Unrecognized command"),
+        };
+    }
+}
+
 fn main() -> Result<(), Box<dyn Error>> {
     pretty_env_logger::init();
     let args: Args = Docopt::new(USAGE)
@@ -173,13 +206,15 @@ fn main() -> Result<(), Box<dyn Error>> {
     let master_key: [u8; 32] = get_master_key(&mut db_conn);
 
     if args.cmd_set {
-        set(db_conn, master_key, &args.flag_namespace);
+        set(&mut db_conn, master_key, &args.flag_namespace);
     } else if args.cmd_get {
-        get(db_conn, master_key, &args.flag_namespace);
+        get(&mut db_conn, master_key, &args.flag_namespace);
     } else if args.cmd_list {
-        list(db_conn, master_key, &args.flag_namespace);
+        list(&mut db_conn, master_key, &args.flag_namespace);
     } else if args.cmd_dump {
-        dump(db_conn, master_key);
+        dump(&mut db_conn, master_key);
+    } else if args.cmd_shell {
+        shell(&mut db_conn, master_key, &args.flag_namespace);
     }
 
     Ok(())