Prepare database to manage recurring events

dev/ical/event_recu.txt

+Example fo recurring event, 1 week, no end, exported by Google
+
+# The recurring event were recorded every monday the 20150518. This is the Recurrence-id, but then
+# first occurence was moved on tuesday. So this record were added.
+BEGIN:VEVENT
+DTSTART;TZID=Europe/Paris:20150519T100000
+DTEND;TZID=Europe/Paris:20150519T110000
+DTSTAMP:20150517T175754Z
+UID:9026chuafli29ns5soshvckamc@google.com
+RECURRENCE-ID;TZID=Europe/Paris:20150518T100000
+CREATED:20150517T174404Z
+DESCRIPTION:
+LAST-MODIFIED:20150517T175008Z
+LOCATION:
+SEQUENCE:1
+STATUS:CONFIRMED
+SUMMARY:aaa
+TRANSP:OPAQUE
+END:VEVENT
+
+# The recurring event were recorded every monday the 20150518.
+BEGIN:VEVENT
+DTSTART;TZID=Europe/Paris:20150518T100000
+DTEND;TZID=Europe/Paris:20150518T110000
+RRULE:FREQ=WEEKLY;BYDAY=MO
+DTSTAMP:20150517T175754Z
+UID:9026chuafli29ns5soshvckamc@google.com
+CREATED:20150517T174404Z
+DESCRIPTION:
+LAST-MODIFIED:20150517T174404Z
+LOCATION:
+SEQUENCE:0
+STATUS:CONFIRMED
+SUMMARY:aaa
+TRANSP:OPAQUE
+END:VEVENT
+
+
+
+
+Example fo recurring event, every 2 month, no end, exported by Google
+
+BEGIN:VEVENT
+DTSTART;TZID=Europe/Paris:20150519T080000
+DTEND;TZID=Europe/Paris:20150519T090000
+RRULE:FREQ=MONTHLY;INTERVAL=2;BYMONTHDAY=19
+DTSTAMP:20150517T175754Z
+UID:urkq3ih1mlaqeu4dbkpdh4i61s@google.com
+CREATED:20150517T175658Z
+DESCRIPTION:
+LAST-MODIFIED:20150517T175658Z
+LOCATION:
+SEQUENCE:0
+STATUS:CONFIRMED
+SUMMARY:bbbbb
+TRANSP:OPAQUE
+END:VEVENT

htdocs/install/mysql/migration/3.7.0-3.8.0.sql

@@ -626,6 +626,8 @@ ALTER TABLE llx_actioncomm ADD COLUMN email_sender varchar(256);
 ALTER TABLE llx_actioncomm ADD COLUMN email_to varchar(256);
 ALTER TABLE llx_actioncomm ADD COLUMN errors_to varchar(256);
 ALTER TABLE llx_actioncomm ADD COLUMN recurid varchar(128);
+ALTER TABLE llx_actioncomm ADD COLUMN recurrule varchar(128);
+ALTER TABLE llx_actioncomm ADD COLUMN ecurdateend datetime;
 
 ALTER TABLE llx_stcomm ADD COLUMN picto varchar(128);
 

htdocs/install/mysql/tables/llx_actioncomm.sql

@@ -61,7 +61,9 @@ create table llx_actioncomm
   errors_to			varchar(256),					-- when event was an email, we store here the erros_to
   
   recurid           varchar(128),                  -- used to store event id to link all recurring event records each other  
-  
+  recurrule         varchar(128),					-- contains string with ical format recurring rule like "FREQ=MONTHLY;INTERVAL=2;BYMONTHDAY=19" or "FREQ=WEEKLY;BYDAY=MO"
+  recurdateend      datetime,
+     
   fk_element		integer DEFAULT NULL,
   elementtype		varchar(32) DEFAULT NULL