[gsoc-admin] EventConfig: Parse ics

[Lasse Schuirmann <lschuirma src gnome org>]

commit 07bf31a225aeeaf43c02ca491430efc5136da956
Author: Lasse Schuirmann <lasse schuirmann gmail com>
Date:   Wed Aug 12 14:27:03 2015 +0200

    EventConfig: Parse ics

 data/config.cfg |    2 +-
 email/config.py |   16 ++++++++++++++--
 2 files changed, 15 insertions(+), 3 deletions(-)
---
diff --git a/data/config.cfg b/data/config.cfg
index cdb9984..db01259 100644
--- a/data/config.cfg
+++ b/data/config.cfg
@@ -9,7 +9,7 @@ path = data/{year}/students
 [FINAL_EVALS]
 type = date
 ics_source = GSoC_Dates
-ics_description = .*[fF]inal evaluation deadline.*
+description_regex = .*[fF]inal evaluation deadline.*
 
 [FOO]
 type = mail_template
diff --git a/email/config.py b/email/config.py
index 20bbc2b..2703a79 100644
--- a/email/config.py
+++ b/email/config.py
@@ -4,6 +4,7 @@ import configparser
 import datetime
 import csv
 from ics import Calendar
+import re
 
 
 def apply_substitutions(uri):
@@ -37,7 +38,7 @@ class EventConfig:
     def __init__(self):
         self.ics_sources = {}
         self.mail_templates = []
-        self.dates = []
+        self.dates = {}
         self.csvs = {}
 
     def append_from_section(self, section):
@@ -55,7 +56,18 @@ class EventConfig:
             return self.append_csv_from_section(section)
 
     def append_date_from_section(self, section):
-        raise NotImplementedError
+        events = self.ics_sources[section['ics_source']].events
+        regex = section['description_regex']
+        if not regex.endswith('$'):
+            regex += '$'
+        possible = list(filter(lambda ev:
+                               re.match(regex, ev.description) is not None,
+                               events))
+        assert len(possible) == 1, ("There are {num} possible events that "
+                                    "match the given regex '{regex}', only 1 "
+                                    "allowed.".format(num=len(possible),
+                                                      regex=regex))
+        self.dates[section.name] = possible[0]
 
     def append_mail_from_section(self, section):
         raise NotImplementedError