added interactive mode (#44)

Co-authored-by: kjuulh <contact@kjuulh.io>
Reviewed-on: https://git.front.kjuulh.io/kjuulh/octopush/pulls/44

crates/octopush_core/src/ui/mod.rs

@@ -0,0 +1,12 @@
+pub mod terminal_ui;
+
+use std::sync::Arc;
+
+use async_trait::async_trait;
+
+#[async_trait]
+pub trait UI {
+    async fn confirm(&self) -> eyre::Result<()>;
+}
+
+pub type DynUI = Arc<dyn UI + Send + Sync>;

crates/octopush_core/src/ui/terminal_ui.rs

@@ -0,0 +1,47 @@
+use std::{
+    io::{self, Write},
+    process::exit,
+};
+
+use async_trait::async_trait;
+
+use super::UI;
+
+pub struct TerminalUI {}
+
+impl TerminalUI {
+    pub fn new() -> Self {
+        Self {}
+    }
+
+    pub async fn query_console(&self) -> eyre::Result<()> {
+        print!("Continue? ([Y]es/[N]o): ");
+        std::io::stdout().lock().flush()?;
+        let mut input = String::new();
+        let _ = io::stdin().read_line(&mut input)?;
+
+        if input.to_lowercase().starts_with("y") {
+            return Ok(());
+        } else if input.to_lowercase().starts_with("n") {
+            exit(0)
+        } else {
+            Err(eyre::anyhow!("input not valid"))
+        }
+    }
+}
+
+#[async_trait]
+impl UI for TerminalUI {
+    async fn confirm(&self) -> eyre::Result<()> {
+        match self.query_console().await {
+            Ok(_) => Ok(()),
+            Err(e) => {
+                if e.to_string().starts_with("input not valid") {
+                    self.query_console().await
+                } else {
+                    Err(e)
+                }
+            }
+        }
+    }
+}