From 501e44c193cc6dd1299956f1ab85465a444b84a2 Mon Sep 17 00:00:00 2001
From: Akshay <nerdy@peppe.rs>
Date: Tue, 30 Jun 2020 10:11:31 +0530
Subject: basic command mode and parsing

---
 src/command.rs | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 src/command.rs

diff --git a/src/command.rs b/src/command.rs
new file mode 100644
index 0000000..5391266
--- /dev/null
+++ b/src/command.rs
@@ -0,0 +1,49 @@
+use cursive::view::Resizable;
+use cursive::views::{Dialog, EditView};
+use cursive::Cursive;
+
+use crate::app::App;
+
+pub fn open_command_window(s: &mut Cursive) {
+    let command_window = Dialog::around(EditView::new().on_submit(call_on_app).fixed_width(40));
+    s.add_layer(command_window);
+}
+
+fn call_on_app(s: &mut Cursive, input: &str) {
+    s.call_on_name("Main", |view: &mut App| {
+        view.parse_command(input);
+    });
+    s.pop_layer();
+}
+
+pub enum Command {
+    Add(String, String, Option<u32>),
+    Delete,
+    Blank,
+}
+
+impl Command {
+    pub fn from_string<P: AsRef<str>>(input: P) -> Self {
+        let mut strings: Vec<&str> = input.as_ref().trim().split(' ').collect();
+        if strings.is_empty() {
+            return Command::Blank;
+        }
+
+        let first = strings.first().unwrap().to_string();
+        let mut args: Vec<String> = strings.iter_mut().skip(1).map(|s| s.to_string()).collect();
+        match first.as_ref() {
+            "add" | "a" => {
+                if args.len() < 2 {
+                    return Command::Blank;
+                }
+                let goal = args.get(2).map(|g| g.parse::<u32>().ok()).flatten();
+                return Command::Add(
+                    args.get_mut(0).unwrap().to_string(),
+                    args.get_mut(1).unwrap().to_string(),
+                    goal,
+                );
+            }
+            _ => return Command::Blank,
+        }
+    }
+}
-- 
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