implement month command

src/commands.rs

@@ -13,6 +13,7 @@ pub mod today;
 pub mod yesterday;
 pub mod sheet;
 pub mod week;
+pub mod month;
 
 pub trait Command<'a> {
     type Args: TryFrom<&'a ArgMatches<'a>>;

src/commands/month.rs

@@ -0,0 +1,60 @@
+use std::convert::TryFrom;
+use std::io::Write;
+
+use clap::ArgMatches;
+use chrono::{DateTime, Utc, Local, Datelike};
+use regex::Regex;
+
+use crate::error::{Result, Error};
+use crate::database::Database;
+use crate::formatters::Formatter;
+use crate::config::Config;
+use crate::regex::parse_regex;
+use crate::timeparse::parse_time;
+
+use super::{Command, display::{Sheet, entries_for_display}};
+
+/// Given a local datetime, returns the time of the previous monday's start
+fn beginning_of_month(now: DateTime<Local>) -> DateTime<Utc> {
+    now.date().with_day(1).unwrap().and_hms(0, 0, 0).with_timezone(&Utc)
+}
+
+#[derive(Default)]
+pub struct Args {
+    ids: bool,
+    end: Option<DateTime<Utc>>,
+    format: Formatter,
+    grep: Option<Regex>,
+    sheet: Option<Sheet>,
+}
+
+impl<'a> TryFrom<&'a ArgMatches<'a>> for Args {
+    type Error = Error;
+
+    fn try_from(matches: &'a ArgMatches) -> Result<Args> {
+        Ok(Args {
+            ids: matches.is_present("ids"),
+            end: matches.value_of("end").map(|s| parse_time(s)).transpose()?,
+            format: matches.value_of("format").unwrap().parse()?,
+            grep: matches.value_of("grep").map(parse_regex).transpose()?,
+            sheet: matches.value_of("sheet").map(|s| s.parse()).transpose()?,
+        })
+    }
+}
+
+pub struct MonthCommand { }
+
+impl<'a> Command<'a> for MonthCommand {
+    type Args = Args;
+
+    fn handle<D, O, E>(args: Self::Args, db: &mut D, out: &mut O, err: &mut E, _config: &Config) -> Result<()>
+    where
+        D: Database,
+        O: Write,
+        E: Write,
+    {
+        let start = beginning_of_month(Local::now());
+
+        entries_for_display(Some(start), args.end, args.sheet, db, out, err, args.format, args.ids, args.grep)
+    }
+}

src/main.rs

@@ -10,6 +10,7 @@ use tiempo::config::Config;
 use tiempo::commands::{
     Command, r#in::InCommand, display::DisplayCommand, sheet::SheetCommand,
     today::TodayCommand, yesterday::YesterdayCommand, week::WeekCommand,
+    month::MonthCommand,
 };
 
 fn error_trap(matches: ArgMatches) -> error::Result<()> {
@@ -26,6 +27,7 @@ fn error_trap(matches: ArgMatches) -> error::Result<()> {
         ("today", Some(matches)) => TodayCommand::handle(matches.try_into()?, &mut conn, &mut out, &mut err, &config),
         ("yesterday", Some(matches)) => YesterdayCommand::handle(matches.try_into()?, &mut conn, &mut out, &mut err, &config),
         ("week", Some(matches)) => WeekCommand::handle(matches.try_into()?, &mut conn, &mut out, &mut err, &config),
+        ("month", Some(matches)) => MonthCommand::handle(matches.try_into()?, &mut conn, &mut out, &mut err, &config),
 
         ("sheet", Some(matches)) => SheetCommand::handle(matches.try_into()?, &mut conn, &mut out, &mut err, &config),
 
@@ -177,6 +179,16 @@ fn main() {
             .arg(sheet_arg.clone())
         )
 
+        .subcommand(SubCommand::with_name("month")
+            .visible_alias("m")
+            .about("Display entries starting this month")
+            .arg(ids_arg.clone())
+            .arg(end_arg.clone())
+            .arg(format_arg.clone())
+            .arg(grep_arg.clone())
+            .arg(sheet_arg.clone())
+        )
+
         .subcommand(SubCommand::with_name("in")
             .visible_alias("i")
             .about("Start an activity in the current timesheet")