From d6874a6775ae3ab47c992f611c5131a8b3853bfb Mon Sep 17 00:00:00 2001
From: Daiki48 <daiki48.engineer@gmail.com>
Date: Fri, 26 Aug 2022 16:30:28 +0900
Subject: [PATCH] first commit

---
 .gitignore   |  1 +
 Cargo.lock   | 39 +++++++++++++++++++++++++++++
 Cargo.toml   |  9 +++++++
 README.md    | 19 ++++++++++++++
 data/db.json |  5 ++++
 src/main.rs  | 71 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 6 files changed, 144 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Cargo.lock
 create mode 100644 Cargo.toml
 create mode 100644 README.md
 create mode 100644 data/db.json
 create mode 100644 src/main.rs

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..6aa8701
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,39 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "itoa"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c8af84674fe1f223a982c933a0ee1086ac4d4052aa0fb8060c12c6ad838e754"
+
+[[package]]
+name = "ryu"
+version = "1.0.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4501abdff3ae82a1c1b477a17252eb69cee9e66eb915c1abaa4f44d873df9f09"
+
+[[package]]
+name = "serde"
+version = "1.0.144"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0f747710de3dcd43b88c9168773254e809d8ddbdf9653b84e2554ab219f17860"
+
+[[package]]
+name = "serde_json"
+version = "1.0.85"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e55a28e3aaef9d5ce0506d0a14dbba8054ddc7e499ef522dd8b26859ec9d4a44"
+dependencies = [
+ "itoa",
+ "ryu",
+ "serde",
+]
+
+[[package]]
+name = "todoapp_cli"
+version = "0.1.0"
+dependencies = [
+ "serde_json",
+]
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..9f3dd8d
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "todoapp_cli"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+serde_json = "1.0.60"
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..c28a95b
--- /dev/null
+++ b/README.md
@@ -0,0 +1,19 @@
+# This is Todo App with Rust lang.
+
+CLI's Todo App.
+
+## Usage
+
+### For Example
+
+Input command
+
+```
+$ cargo run -- add "todo test1"
+```
+
+confirmation
+
+```
+$ cat ./data/db.json
+```
diff --git a/data/db.json b/data/db.json
new file mode 100644
index 0000000..91ad1f3
--- /dev/null
+++ b/data/db.json
@@ -0,0 +1,5 @@
+{
+  "second test": true,
+  "code test": true,
+  "first test": false
+}
\ No newline at end of file
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..0b10691
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,71 @@
+use std::collections::HashMap;
+
+struct Todo {
+    map: HashMap<String, bool>,
+}
+
+impl Todo {
+    fn insert(&mut self, key: String) {
+        // insert a new item into our map.
+        // we pass true as value
+        self.map.insert(key, true);
+    }
+
+    fn save(self) -> Result<(), Box<dyn std::error::Error>> {
+        let content = std::fs::OpenOptions::new()
+            .write(true)
+            .create(true)
+            .truncate(true)
+            .open("./data/db.json")?;
+        serde_json::to_writer_pretty(content, &self.map)?;
+        Ok(())
+    }
+
+    fn new() -> Result<Todo, std::io::Error> {
+        let list = std::fs::OpenOptions::new()
+            .write(true)
+            .create(true)
+            .read(true)
+            .open("./data/db.json")?;
+
+        match serde_json::from_reader(list) {
+            Ok(map) => Ok(Todo {map}),
+            Err(e) if e.is_eof() => Ok(Todo {
+                map: HashMap::new(),
+            }),
+            Err(e) => panic!("An error occurred: {}", e),
+        }
+    }
+
+    fn complete(&mut self, key: &String) -> Option<()> {
+        match self.map.get_mut(key) {
+            Some(v) => Some(*v = false),
+            None => None,
+        }
+    }
+
+
+}
+
+fn main() {
+    let action = std::env::args().nth(1).expect("Please specify an action");
+    let item = std::env::args().nth(2).expect("Please specify an item");
+
+    let mut todo = Todo::new().expect("Initialisation of db failed");
+
+    if action == "add" {
+        todo.insert(item);
+        match todo.save() {
+            Ok(_) => println!("todo saved"),
+            Err(why) => println!("An error occurred: {}", why),
+        }
+    } else if action == "complete" {
+        match todo.complete(&item) {
+            None => println!("'{}' is not present in the list", item),
+            Some(_) => match todo.save() {
+                Ok(_) => println!("todo saved"),
+                Err(why) => println!("An error occurred: {}", why),
+            },
+        }
+    }
+}