Add kairos support in "list" subcommand

This patch adds kairos support in the "list" subcommand for the "-f" and
"-t" parameters which limit the entries to show.

Something like

    imag timetrack list --from yesterday

is now possible.

bin/domain/imag-timetrack/Cargo.toml

@@ -25,6 +25,7 @@ chrono = "0.4"
 filters = "0.2"
 itertools = "0.7"
 prettytable-rs = "0.6"
+kairos = "0.1"
 
 libimagstore     = { version = "0.7.0", path = "../../../lib/core/libimagstore" }
 libimagrt        = { version = "0.7.0", path = "../../../lib/core/libimagrt" }

bin/domain/imag-timetrack/src/list.rs

@@ -17,13 +17,14 @@
 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 //
 
-use std::str::FromStr;
-
 use chrono::NaiveDateTime;
 use filters::filter::Filter;
 use prettytable::Table;
 use prettytable::row::Row;
 use prettytable::cell::Cell;
+use kairos::parser::Parsed;
+use kairos::parser::parse as kairos_parse;
+use clap::ArgMatches;
 
 use libimagerror::trace::trace_error;
 use libimagerror::trace::MapErrTrace;
@@ -39,23 +40,38 @@ pub fn list(rt: &Runtime) -> i32 {
     let (_, cmd) = rt.cli().subcommand();
     let cmd = cmd.unwrap(); // checked in main()
 
-    let start = match cmd.value_of("start-time").map(::chrono::naive::NaiveDateTime::from_str) {
-        None         => None,
-        Some(Ok(dt)) => Some(dt),
-        Some(Err(e)) => {
-            trace_error(&e);
-            None
-        }
-    };
-    let end = match cmd.value_of("end-time").map(::chrono::naive::NaiveDateTime::from_str) {
-        None         => None,
-        Some(Ok(dt)) => Some(dt),
-        Some(Err(e)) => {
-            trace_error(&e);
-            None
+    let gettime = |cmd: &ArgMatches, name| {
+        match cmd.value_of(name).map(kairos_parse) {
+            Some(Ok(Parsed::TimeType(tt))) => match tt.calculate() {
+                Ok(tt) => {
+                    let dt = tt.get_moment().unwrap_or_else(|| {
+                        error!("Failed to get date from '{}'", cmd.value_of(name).unwrap());
+                        ::std::process::exit(1)
+                    });
+
+                    Some(dt.clone())
+                },
+                Err(e) => {
+                    error!("Failed to calculate date from '{}': {:?}",
+                           cmd.value_of(name).unwrap(), e);
+                    ::std::process::exit(1)
+                },
+            },
+            Some(Ok(Parsed::Iterator(_))) => {
+                error!("Expected single point in time, got '{}', which yields a list of dates", cmd.value_of(name).unwrap());
+                ::std::process::exit(1)
+            },
+            Some(Err(e)) => {
+                trace_error(&e);
+                ::std::process::exit(1)
+            }
+            None => None,
         }
     };
 
+    let start = gettime(&cmd, "start-time");
+    let end   = gettime(&cmd, "end-time");
+
     let list_not_ended = cmd.is_present("list-not-ended");
 
     list_impl(rt, start, end, list_not_ended)

bin/domain/imag-timetrack/src/main.rs

@@ -25,6 +25,7 @@ extern crate chrono;
 extern crate filters;
 extern crate itertools;
 extern crate prettytable;
+extern crate kairos;
 
 extern crate libimagerror;
 extern crate libimagstore;

doc/src/09020-changelog.md

@@ -19,6 +19,9 @@ Version 0.y.z and thus we can break the API like we want and need to.
 This section contains the changelog from the last release to the next release.
 
 * Major changes
+    * `imag-timetrack list --from/--to` now have `kairos` support - that means
+      that complex `--from/--to` arguments (like `yesterday` or `today-2weeks`)
+      are now possible
 * Minor changes
 * Bugfixes