From e25478e4d7e5ae8df93f3cab4948e71fd0652119 Mon Sep 17 00:00:00 2001
From: Matthias Beyer <mail@beyermatthias.de>
Date: Fri, 25 Aug 2017 15:03:46 +0200
Subject: [PATCH] Impl "month" subcommand

---
 imag-timetrack/src/month.rs | 112 +++++++++++++++++++++++++++++++++++-
 1 file changed, 111 insertions(+), 1 deletion(-)

diff --git a/imag-timetrack/src/month.rs b/imag-timetrack/src/month.rs
index 61d974d7..0f9872c3 100644
--- a/imag-timetrack/src/month.rs
+++ b/imag-timetrack/src/month.rs
@@ -17,9 +17,119 @@
 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 //
 
+use std::cmp::Ord;
+use std::cmp::Ordering;
+use std::str::FromStr;
+
+use filters::ops::not::Not;
+use filters::filter::Filter;
+use itertools::Itertools;
+use itertools::MinMaxResult;
+use chrono::NaiveDateTime;
+
+use libimagerror::trace::trace_error;
+use libimagerror::trace::MapErrTrace;
+use libimagerror::iter::TraceIterator;
+use libimagstore::store::FileLockEntry;
+use libimagentrytimetrack::timetrackingstore::TimeTrackStore;
+use libimagentrytimetrack::timetracking::TimeTracking;
+use libimagentrytimetrack::tag::TimeTrackingTag;
+use libimagentrytimetrack::iter::filter::*;
+
 use libimagrt::runtime::Runtime;
 
 pub fn month(rt: &Runtime) -> i32 {
-    unimplemented!()
+    let cmd = rt.cli().subcommand().1.unwrap(); // checked in main
+
+    let filter = {
+        use chrono::offset::Local;
+        use chrono::naive::NaiveDate;
+        use chrono::Weekday;
+        use chrono::Datelike;
+
+        let now = Local::now();
+
+        let start = match cmd.value_of("start").map(::chrono::naive::NaiveDateTime::from_str) {
+            None => NaiveDate::from_ymd(now.year(), now.month(), 1).and_hms(0, 0, 0),
+            Some(Ok(dt)) => dt,
+            Some(Err(e)) => {
+                trace_error(&e);
+                return 1
+            }
+        };
+
+        let end = match cmd.value_of("end").map(::chrono::naive::NaiveDateTime::from_str) {
+            None => {
+
+                // Is it much harder to go to the last second of the current month than to the first
+                // second of the next month, right?
+                let (year, month)  = if now.month() == 12 {
+                    (now.year() + 1, 1)
+                } else {
+                    (now.year(), now.month())
+                };
+
+                NaiveDate::from_ymd(year, month, 1).and_hms(0, 0, 0)
+            },
+            Some(Ok(dt)) => dt,
+            Some(Err(e)) => {
+                trace_error(&e);
+                return 1
+            }
+        };
+
+        let tags = cmd
+            .values_of("tags")
+            .map(|ts| ts.into_iter().map(String::from).map(TimeTrackingTag::from).collect());
+
+        let start_time_filter = has_start_time_where(move |dt: &NaiveDateTime| {
+            start <= *dt
+        });
+
+        let end_time_filter = has_end_time_where(move |dt: &NaiveDateTime| {
+            end >= *dt
+        });
+
+        let tags_filter = move |fle: &FileLockEntry| {
+            match tags {
+                Some(ref tags) => has_one_of_tags(&tags).filter(fle),
+                None => true,
+            }
+        };
+
+        tags_filter.and(start_time_filter).and(end_time_filter)
+    };
+
+    rt.store()
+        .get_timetrackings()
+        .and_then(|iter| {
+            iter.trace_unwrap()
+                .filter(|e| filter.filter(e))
+                .fold(Ok(()), |acc, e| {
+                    acc.and_then(|_| {
+                        debug!("Processing {:?}", e.get_location());
+
+                        let tag   = try!(e.get_timetrack_tag());
+                        debug!(" -> tag = {:?}", tag);
+
+                        let start = try!(e.get_start_datetime());
+                        debug!(" -> start = {:?}", start);
+
+                        let end   = try!(e.get_end_datetime());
+                        debug!(" -> end = {:?}", end);
+
+                        match (start, end) {
+                            (None, _)          => println!("{} has no start time.", tag),
+                            (Some(s), None)    => println!("{} | {} - ...", tag, s),
+                            (Some(s), Some(e)) => println!("{} | {} - {}", tag, s, e),
+                        }
+
+                        Ok(())
+                    })
+                })
+        })
+        .map(|_| 0)
+        .map_err_trace()
+        .unwrap_or(1)
 }