add a simple CLI

src/bin/task.rs

@@ -0,0 +1,39 @@
+extern crate clap;
+use clap::{App, Arg, SubCommand};
+use ot::{Replica, DB};
+use uuid::Uuid;
+
+fn main() {
+    let matches = App::new("Rask")
+        .version("0.1")
+        .author("Dustin J. Mitchell <dustin@v.igoro.us>")
+        .about("Replacement for TaskWarrior")
+        .subcommand(
+            SubCommand::with_name("add")
+                .about("adds a task")
+                .arg(Arg::with_name("title").help("task title").required(true)),
+        )
+        .subcommand(SubCommand::with_name("list").about("lists tasks"))
+        .get_matches();
+
+    let mut replica = Replica::new(DB::new().into());
+
+    match matches.subcommand() {
+        ("add", Some(matches)) => {
+            let uuid = Uuid::new_v4();
+            replica.create_task(uuid).unwrap();
+            replica
+                .update_task(uuid, "title", Some(matches.value_of("title").unwrap()))
+                .unwrap();
+        }
+        ("list", _) => {
+            for task in replica.all_tasks() {
+                println!("{:?}", task);
+            }
+        }
+        ("", None) => {
+            unreachable!();
+        }
+        _ => unreachable!(),
+    };
+}

src/lib.rs

@@ -8,5 +8,6 @@ mod server;
 mod taskdb;
 
 pub use operation::Operation;
+pub use replica::Replica;
 pub use server::Server;
 pub use taskdb::DB;

src/replica.rs

@@ -6,7 +6,7 @@ use std::collections::HashMap;
 use uuid::Uuid;
 
 /// A replica represents an instance of a user's task data.
-struct Replica {
+pub struct Replica {
     taskdb: Box<DB>,
 }
 
@@ -46,6 +46,11 @@ impl Replica {
         })
     }
 
+    /// Get all tasks as an iterator of (&Uuid, &HashMap)
+    pub fn all_tasks(&self) -> impl Iterator<Item = (&Uuid, &HashMap<String, String>)> {
+        self.taskdb.tasks().iter()
+    }
+
     /// Get an existing task by its UUID
     pub fn get_task(&self, uuid: &Uuid) -> Option<&HashMap<String, String>> {
         self.taskdb.tasks().get(&uuid)