refactor: major refactoring of the code base

`opts` was renamed to `cli` to conform to upstreams (clap) naming
convention

`lib` was renamed to `utils`

The whole style module was split up - the styles as defined in the theme
are now part of the theme module. The `utils` module contains a simple
method to convert the style definition from the theme to a string.

`theme` is now a submodule of `config`

The `DateProperty` is now part of the theme as well.

The `date`, `calendar` and `agenda` modules where moved to a new
`output` module.

src/opts.rs → src/cli.rs

@@ -2,14 +2,14 @@
 //
 // SPDX-License-Identifier: MIT
 
-use crate::lib::types::ChronoDate;
+use crate::utils::ChronoDate;
 use anyhow::{anyhow, Result};
 use chrono::prelude::*;
 use clap::{crate_authors, crate_name, crate_version, Parser};
 
 #[derive(Parser)]
 #[clap(version = crate_version!(), author = crate_authors!(","), about = "Display a calendar")]
-pub struct Opts {
+pub struct Cli {
  #[clap(short = '1', long = "one", help = "show only current month (default)", conflicts_with_all = &["three", "year"])]
  pub one: bool,
  #[clap(
@@ -39,9 +39,9 @@ pub struct Opts {
  pub date: Vec<String>,
 }
 
-impl Default for Opts {
+impl Default for Cli {
  fn default() -> Self {
- Opts {
+ Cli {
  one: true,
  three: false,
  year: false,
@@ -56,7 +56,7 @@ impl Default for Opts {
  }
 }
 
-impl Opts {
+impl Cli {
  pub fn validate_date(&self) -> Result<ChronoDate> {
  let mut today: ChronoDate = Local::now().date_naive();
  let mut year: i32 = today.year();
@@ -148,13 +148,13 @@ mod tests {
  #[test]
  fn test_validate_date_defaults_to_now() {
  let today: ChronoDate = Local::now().date_naive();
- let o: Opts = Opts::default();
+ let o: Cli = Cli::default();
  assert_eq!(today, o.validate_date().unwrap());
  }
  #[test]
  fn test_validate_date_default_to_now_with_custom_year() {
  let today: ChronoDate = Local::now().date_naive().with_year(2007).unwrap();
- let mut o: Opts = Opts::default();
+ let mut o: Cli = Cli::default();
  o.date = vec![String::from("2007")];
  assert_eq!(today, o.validate_date().unwrap());
  }
@@ -166,7 +166,7 @@ mod tests {
  .unwrap()
  .with_month(1)
  .unwrap();
- let mut o: Opts = Opts::default();
+ let mut o: Cli = Cli::default();
  o.date = vec![String::from("2007"), String::from("1")];
  assert_eq!(today, o.validate_date().unwrap());
  }
@@ -180,14 +180,14 @@ mod tests {
  .unwrap()
  .with_day(28)
  .unwrap();
- let mut o: Opts = Opts::default();
+ let mut o: Cli = Cli::default();
  o.date = vec![String::from("2007"), String::from("1"), String::from("28")];
  assert_eq!(today, o.validate_date().unwrap());
  }
  #[test]
  fn test_validate_date_defaults_to_now_with_ambiguous_arguments() {
  let today: ChronoDate = Local::now().date_naive();
- let mut o: Opts = Opts::default();
+ let mut o: Cli = Cli::default();
  o.date = vec![
  String::from("2007"),
  String::from("1"),
@@ -198,19 +198,19 @@ mod tests {
  }
  #[test]
  fn test_validate_date_errors_with_wrong_month() {
- let mut o: Opts = Opts::default();
+ let mut o: Cli = Cli::default();
  o.date = vec![String::from("2007"), String::from("13"), String::from("28")];
  assert!(o.validate_date().is_err());
  }
  #[test]
  fn test_validate_date_errors_with_wrong_day() {
- let mut o: Opts = Opts::default();
+ let mut o: Cli = Cli::default();
  o.date = vec![String::from("2007"), String::from("11"), String::from("33")];
  assert!(o.validate_date().is_err());
  }
  #[test]
  fn test_validate_date_errors_with_wrong_year() {
- let mut o: Opts = Opts::default();
+ let mut o: Cli = Cli::default();
  o.date = vec![
  String::from("999999"),
  String::from("11"),
@@ -220,13 +220,13 @@ mod tests {
  }
  #[test]
  fn test_validate_date_errors_with_unparsable_year() {
- let mut o: Opts = Opts::default();
+ let mut o: Cli = Cli::default();
  o.date = vec![String::from("foo"), String::from("13"), String::from("28")];
  assert!(o.validate_date().is_err());
  }
  #[test]
  fn test_validate_date_errors_with_unparsable_month() {
- let mut o: Opts = Opts::default();
+ let mut o: Cli = Cli::default();
  o.date = vec![
  String::from("2007"),
  String::from("foo"),
@@ -236,7 +236,7 @@ mod tests {
  }
  #[test]
  fn test_validate_date_errors_with_unparsable_day() {
- let mut o: Opts = Opts::default();
+ let mut o: Cli = Cli::default();
  o.date = vec![
  String::from("2007"),
  String::from("11"),
@@ -247,7 +247,7 @@ mod tests {
  #[test]
  fn test_validate_date_errors_with_non_existent_date() {
  let today: ChronoDate = Local::now().date_naive();
- let mut o: Opts = Opts::default();
+ let mut o: Cli = Cli::default();
  o.date = vec![String::from("2007"), String::from("2"), String::from("30")];
  assert_eq!(today, o.validate_date().unwrap());
  }