commit c9f713390c35d056aa3b08d159f7bdd478139248
Author: Julio Biason <julio.biason@gmail.com>
Date:   Sun May 3 20:51:24 2020 -0300

    Add an event

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..b94e3a6
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+/target
+events.toml
+.idea
+*.sw?
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..4ceeb6c
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,231 @@
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+ "winapi-i686-pc-windows-gnu",
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..10479dd
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,13 @@
+[package]
+name = "tu"
+description = "TimeUP!"
+version = "0.1.0"
+authors = ["Julio Biason <julio.biason@gmail.com>"]
+edition = "2018"
+
+[dependencies]
+chrono = "0.4.11"
+clap = "2.33.0"
+serde = "*"
+serde_derive = "*"
+toml = "0.5"
diff --git a/src/args/mod.rs b/src/args/mod.rs
new file mode 100644
index 0000000..46e8f63
--- /dev/null
+++ b/src/args/mod.rs
@@ -0,0 +1,75 @@
+use clap::crate_authors;
+use clap::crate_description;
+use clap::crate_name;
+use clap::crate_version;
+use clap::App;
+use clap::Arg;
+use clap::ArgMatches;
+use clap::SubCommand;
+
+mod validators;
+
+type Description = String;
+type Date = String;
+type Time = String;
+
+#[derive(Debug)]
+pub enum Action {
+    List,
+    Add(Description, Date),
+    AddWithTime(Description, Date, Time),
+}
+
+pub fn parse() -> Result<Action, ()> {
+    let params = App::new(crate_name!())
+        .version(crate_version!())
+        .author(crate_authors!())
+        .about(crate_description!())
+        .subcommand(
+            SubCommand::with_name("add")
+                .about("Add a new event")
+                .arg(
+                    Arg::with_name("date")
+                        .required(true)
+                        .takes_value(true)
+                        .validator(validators::date)
+                        .help("Date for the event, in YYYY-MM-DD format"),
+                )
+                .arg(
+                    Arg::with_name("description")
+                        .required(true)
+                        .takes_value(true)
+                        .help("Event description"),
+                )
+                .arg(
+                    Arg::with_name("time")
+                        .short("t")
+                        .long("time")
+                        .takes_value(true)
+                        .required(false)
+                        .validator(validators::time)
+                        .help("Time for the event"),
+                ),
+        );
+    let matches = params.get_matches();
+
+    match matches.subcommand() {
+        ("", _) => Ok(Action::List),
+        ("add", Some(arguments)) => parse_add(arguments),
+        (_, _) => Err(()),
+    }
+}
+
+fn parse_add(arguments: &ArgMatches) -> Result<Action, ()> {
+    let description = arguments.value_of("description").unwrap();
+    let date = arguments.value_of("date").unwrap();
+    if let Some(time) = arguments.value_of("time") {
+        Ok(Action::AddWithTime(
+            description.into(),
+            date.into(),
+            time.into(),
+        ))
+    } else {
+        Ok(Action::Add(description.into(), date.into()))
+    }
+}
diff --git a/src/args/validators.rs b/src/args/validators.rs
new file mode 100644
index 0000000..df94bbc
--- /dev/null
+++ b/src/args/validators.rs
@@ -0,0 +1,19 @@
+use chrono::prelude::*;
+
+pub fn date(input: String) -> Result<(), String> {
+    let fake_datetime = format!("{} 00:00:00", input);
+    if let Ok(_) = dbg!(Utc.datetime_from_str(&fake_datetime, "%Y-%m-%d %H:%M:%S")) {
+        Ok(())
+    } else {
+        Err(format!("Invalid date: '{}'", input))
+    }
+}
+
+pub fn time(input: String) -> Result<(), String> {
+    let fake_datetime = format!("2020-01-01 {}:00", input);
+    if let Ok(_) = dbg!(Utc.datetime_from_str(&fake_datetime, "%Y-%m-%d %H:%M:%S")) {
+        Ok(())
+    } else {
+        Err(format!("Invalid time: '{}'", input))
+    }
+}
diff --git a/src/eventlist/event.rs b/src/eventlist/event.rs
new file mode 100644
index 0000000..0613acd
--- /dev/null
+++ b/src/eventlist/event.rs
@@ -0,0 +1,47 @@
+use chrono::prelude::*;
+use serde_derive::Deserialize;
+use serde_derive::Serialize;
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct Date {
+    year: i32,
+    month: u32,
+    day: u32,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct Time {
+    hour: u32,
+    min: u32,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+#[serde(tag = "due", content = "datetime")]
+pub enum EventDateType {
+    AllDay(Date),
+    AtTime(Date, Time),
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct Event {
+    description: String,
+    due: EventDateType,
+}
+
+impl Event {
+    pub fn new_on_date(description: &str, date: &str) -> Self {
+        let fake_datetime = format!("{} 00:00:00", date);
+        if let Ok(dt) = Utc.datetime_from_str(&fake_datetime, "%Y-%m-%d %H:%M:%S") {
+            Self {
+                description: description.into(),
+                due: EventDateType::AllDay(Date {
+                    year: dt.year(),
+                    month: dt.month(),
+                    day: dt.day(),
+                }),
+            }
+        } else {
+            panic!("Failed to parse the date");
+        }
+    }
+}
diff --git a/src/eventlist/eventlist.rs b/src/eventlist/eventlist.rs
new file mode 100644
index 0000000..4a69d8b
--- /dev/null
+++ b/src/eventlist/eventlist.rs
@@ -0,0 +1,42 @@
+use serde_derive::Deserialize;
+use serde_derive::Serialize;
+use std::fs::File;
+use std::io::{Read, Write};
+use toml;
+
+use crate::eventlist::event::Event;
+
+static FILENAME: &str = "events.toml";
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct EventList {
+    events: Vec<Event>,
+}
+
+impl EventList {
+    fn empty() -> Self {
+        Self { events: Vec::new() }
+    }
+
+    pub fn load() -> Self {
+        if let Ok(mut fp) = File::open(FILENAME) {
+            let mut content = String::new();
+            fp.read_to_string(&mut content)
+                .expect("Your event file is corrupted");
+            toml::from_str(&content).unwrap_or(EventList::empty())
+        } else {
+            EventList::empty()
+        }
+    }
+
+    pub fn push(&mut self, event: Event) {
+        self.events.push(event);
+    }
+
+    pub fn save(&self) {
+        let content = toml::to_string(&self).unwrap();
+        if let Ok(mut fp) = File::create(FILENAME) {
+            fp.write_all(content.as_bytes()).unwrap();
+        }
+    }
+}
diff --git a/src/eventlist/mod.rs b/src/eventlist/mod.rs
new file mode 100644
index 0000000..52256bd
--- /dev/null
+++ b/src/eventlist/mod.rs
@@ -0,0 +1,2 @@
+pub mod event;
+pub mod eventlist;
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..87107ce
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,26 @@
+mod args;
+mod eventlist;
+
+use crate::eventlist::event::Event;
+use crate::eventlist::eventlist::EventList;
+
+fn main() {
+    if let Ok(command) = dbg!(args::parse()) {
+        match command {
+            args::Action::List => list(),
+            args::Action::Add(description, date) => add_with_date(&description, &date),
+            _ => println!("Unknown command"),
+        }
+    }
+}
+
+fn list() {
+    unimplemented!()
+}
+
+fn add_with_date(description: &str, date: &str) {
+    let event = Event::new_on_date(description, date);
+    let mut event_list = dbg!(EventList::load());
+    event_list.push(event);
+    event_list.save();
+}