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* Recurrence rule extensionsLars Henriksen2020-04-286-25/+847
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Terms and concepts are from RFC 5545 (the iCalendar specification). Overall design -------------- Calcurse is extended with full support for BYMONTH, BYDAY and BYMONTHDAY recurrence rule (rrule) parts. The three rule parts are lists of, respectively, months, weekdays and monthdays. The lists are added to 'struct rpt' as linked lists of integers, and the data file format is extended accordingly (details below). Load and save of the lists follow the pattern of the existing list of exception dates, also in 'struct rpt'. The function recur_item_find_occurence() is split into a front-end and a back-end. The back-end, called find_occurrence(), is the original function extended with rrule reductions; the front-end retains the original name and performs rrule expansions. Front-end plus back-end are backwards compatible and require no changes in calling functions. There is no user interface in this patch. Data file extensions -------------------- The BYMONTH, BYDAY and BYMONTHDAY lists are added to that part of an item line which describes the recurrence rule (the "{...}" part). Each list is - like the list of exception days - a space-separated string of values identified by the initial character. Each list is optional and, if present, must follow the until date and precede the exception day list. The lists must appear in order BYMONTHDAY list, BYDAY list and BYMONTH list. The possible list values are - BYMONTH: m1, m2, ..., m12 - BYDAY: w0, w1, ..., w6, w7, w-7, w8, w-8, ..., w377, w-377 - BYMONTHDAY: d1, d2, ..., d31, d-1, d-2, ..., d-31 which are interpreted as (cf. RFC 5545) - BYMONTH: January, February, ..., December. - BYDAY: SU, MO, ..., SA, +1SU, -1SU, +1MO, -1MO, ..., +53SA, -53SA - BYMONTHDAY: the first, the second, ..., the 31st, the last, the last but one, ..., the last but 30 day of the month Examples: Thursday, TH, is w4; Saturday, SA, is w6. The seventh Thursday, +7TH, is w53 (7 * 7 + 4 = 53); the last but second Saturday, -2SA, is w-20 (2 * 7 + 6 = 20); the last day of the month is d-1. Note that the values w-1, w-2, ..., w-6 are not used. A recurrent appointment with a BYDAY rule part: 06/23/2019 @ 12:00 -> 06/23/2019 @ 13:00 {1W w0 w6} |every week on Sunday and Saturday An event with a BYDAY and a BYMONTH rule part: 10/27/2019 [1] {1Y w-7 m10} every year on last Sunday in October An event with until date, a BYMONTH rule part and an exception day: 06/23/2019 [1] {1Y -> 08/31/2021 m5 m6 m7 !07/23/2020} every year on the 23rd in May, June and July for three years, starting on Sunday, 23 June 2019, but not on 23 July 2020. Recurrence set expansion and reduction --------------------------------------- In calcurse a recurrence rule is a quadruple (s, d, r, e) consisting of start, duration, repetition pattern and exception days and is implemented as: (time_t start, long dur, struct rpt *rpt, llist_t *exc) In RFC 5545 parlance, a recurrence rule defines a recurrence set consisting of all recurrence instances (occurrences) not earlier than start which match the rule pattern. With this concept in mind, recur_item_find_occurremce() may be thought of as a membership function for a recurrence set. The call recur_item_find_occurrence(s, d, r, e, day, occurrence) returns true if day belongs to the recurrence set of (s, d, r, e); if so occurrence points to the recurrence instance (the set member). For a recurrence rule with only the basic DAYLY, WEEKLY, MONTHLY or YEARLY type and frequency the recurrence set consists of periodically repeated instances. The BYxxx rule parts modify the recurrence set by reducing or expanding it as specified by RFC 5545. Expansion is implemented in the front-end by modifications of start and/or frequency of the rule (s, d, r, e), often several times, in such a way that the desired recurrence instances are included in the recurrence set. This is possible because the front-end as the very first thing checks for early days (day < s). When day is known not to be early, start (s) can safely be moved backwards. Likewise, if frequency must be changed, the front-end checks whether the frequency repetition applies to the week, month or year of day. Reduction is easier and is performed in the back-end along with the existing validity checks. It consists in checking whether month, day of month or weekday of a found occurrence is on the appropriate list. Signed-off-by: Lars Henriksen <LarsHenriksen@get2net.dk> Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Refactor edit of exception daysLars Henriksen2020-04-283-24/+34
| | | | | | | | | | | | | | | The patch contains no functional changes, but is a necessary precondition for extensions of update_rept() (in ui-day.c) with further recurrence rules. The reason is that recurrence parameters must be treated as a whole: if an edit session is cancelled at any point, no value should change, and all parameters should remain as they were. Hence, the new values must only be set after all of them have been determined. This was not the case for the list of exception days, but as long as it was treated last, it did not matter. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Improve data load error reportingLars Henriksen2020-04-285-53/+54
| | | | | | | | | | | The last part of loading appointments and events is performed by four "scan" functions called from io_load_app(). Failure in this part of data load does not use io_load_error(). The four "scan" functions are changed to return an error message on failure and NULL otherwise (the previous return value was not used). Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Refactor function calls: recurrence parameters as a single argumentLars Henriksen2020-04-285-189/+151
| | | | | | | | | | | | | | | | | | | | | The recurrence parameters are type, frequency, until date and exception list (in RFC 5545 parlance FREQ, INTERVAL, UNTIL and EXDATE's). When these are passed in a function call, the argument list becomes long and not very readable. When support for extended recurrence rules is implemented, the number of recurrence parameters increases, and function signatures must be amended. Solution: The "struct rpt" is extended with the exception list; any future recurrence parameters are added here. A pointer to this structure replaces the recurrence parameters in function calls. Note: Each recurrent event and appoinment instance has (a pointer to) a "struct rpt" and in addition an exception list. The latter is retained to avoid the derived changes, and the exception list in the structure is initialized to an empty list when the recurrent instance is created. Signed-off-by: Lars Henriksen <LarsHenriksen@get2net.dk> Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Use "struct rpt" to shorten argument listsLars Henriksen2020-04-284-95/+78
| | | | | | | Also, prepare for extension of the structure, shorten names and rearrange comments. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Extend use of note file for iCal importLars Henriksen2020-04-287-77/+479
| | | | | | | | | | iCal import to an item note file is extended from DESCRIPTION to LOCATION, COMMENT and STATUS for both events and todos. Addresses GitHub issue #9. Signed-off-by: Lars Henriksen <LarsHenriksen@get2net.dk> Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Accept empty DESCRIPTION in ical importLars Henriksen2020-04-282-7/+3
| | | | | | | Adresses GitHub issue #274. Signed-off-by: Lars Henriksen <LarsHenriksen@get2net.dk> Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Fix formatting of DTSTART for recurrent eventsJerem-K2020-04-281-1/+1
| | | | Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Fix typos in calcurse.1.txtMatthias Braun2020-04-281-3/+3
| | | | Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Release 4.6.0v4.6.0Lukas Fleischer2020-03-273-2/+33
| | | | Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* po/: Translation updates from TransifexLukas Fleischer2020-03-278-133/+362
| | | | Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Fix missing EOL in imported noteLars Henriksen2020-03-271-1/+6
| | | | | Signed-off-by: Lars Henriksen <LarsHenriksen@get2net.dk> Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Extend iCalendar import testsLars Henriksen2020-03-227-1/+165
| | | | | | | | Tests ical-010.sh and ical-011.sh assume that Github issue #265 has been fixed (escape-encoding by export). Signed-off-by: Lars Henriksen <LarsHenriksen@get2net.dk> Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Fix decoding of escaped characters in imported textLars Henriksen2020-03-223-14/+23
| | | | | | | | Stick strictly to RFC 5545, 3.3.11, Text, for SUMMARY and DESCRIPTION. Adresses Github issue #271. Signed-off-by: Lars Henriksen <LarsHenriksen@get2net.dk> Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Fix ical import loggingLars Henriksen2020-03-221-29/+59
| | | | | | | | | | | | | | | | | | | | | | | | The following issues have been fixed: Functions ical_read_event() and ical_read__todo() do not check the return value of functions which may fail, in which case an item is not skipped even though a problem may have been logged by the called function. Function ical_read_note() fails on empty DESCRIPTION, but does not log it. Function ical_read_exdate() may log a failure, but cannot fail itself. Function ical_read_summary() can fail, but not log a failure. Function ical_read_todo() do not skip a todo with an invalid priority. Additionally: A safety check has been added to ical_get_value(), and log messages resulting from failures have been made uniform. Signed-off-by: Lars Henriksen <LarsHenriksen@get2net.dk> Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Fix display of interactively imported todosLars Henriksen2020-03-221-0/+1
| | | | | | | Todos were imported (and saved), but not loaded into the listbox for display. Signed-off-by: Lars Henriksen <LarsHenriksen@get2net.dk> Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Improve ical import loggingLars Henriksen2020-03-2212-40/+49
| | | | | | | | | The log file is not deleted if items were skipped (adresses Github issue #269). The log file includes the import file name and time. The import line numbers have been corrected (and tests amended). Signed-off-by: Lars Henriksen <LarsHenriksen@get2net.dk> Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Escape necessary characters in SUMMARY on exportKelvin Jackson2020-03-221-5/+26
| | | | | | | Escape semicolons, commas, and backslashes when exporting a calendar item to iCal format. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* gitignore: ignore lots of auto-generated fileshoijui2020-02-181-0/+10
| | | | Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* gitignore: fix config.* ignorehoijui2020-02-181-1/+1
| | | | Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* caldav: Fix XDG_CONFIG_HOME not defaulting to ~/.configNitroretro2020-02-041-1/+1
| | | | Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Update copyright rangesLukas Fleischer2020-01-3054-56/+56
| | | | Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Update message catalogLukas Fleischer2020-01-301-4/+7
| | | | Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Refactor cut and paste registersLars Henriksen2020-01-134-16/+25
| | | | | | | | | | Register REG_BLACK_HOLE can neither be copied into nor pasted from and has been removed from the input routine. Register 36 was not used. Signed-off-by: Lars Henriksen <LarsHenriksen@get2net.dk> Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Optimize error handling in io_check_dir()Nitroretro2019-12-291-12/+13
| | | | Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Improve manual readabilityNitroretro2019-12-291-18/+39
| | | | Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Improve man page readabilityNitroretro2019-12-291-24/+19
| | | | Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Test for the directory structureNitroretro2019-12-237-0/+74
| | | | | | | | Ensure that calcurse uses the right data and configuration directories depending on the conditions. Helped-by: Lars Henriksen <LarsHenriksen@get2net.dk> Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Use $XDG_{CONFIG,DATA}_HOME in hooksNitroretro2019-12-233-19/+51
| | | | Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* calcurse-upgrade: use $XDG_CONFIG_HOMENitroretro2019-12-231-1/+1
| | | | Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* calcurse-vdirsyncer: use $XDG_DATA_HOMENitroretro2019-12-231-1/+1
| | | | Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* calcurse-caldav: use $XDG_{CONFIG,DATA}_HOMENitroretro2019-12-231-5/+15
| | | | Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Change documentation to reflect the new file structureNitroretro2019-12-2311-70/+109
| | | | Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Add XDG Base Directory SupportNitroretro2019-12-232-9/+37
| | | | | | | | | | | * Use "$XDG_DATA_HOME/calcurse" for data files * Use "$XDG_CONFIG_HOME/calcurse" for config files * "$XDG_DATA_HOME" defaults to "$HOME/.local/share" * "$XDG_CONFIG_HOME" defaults to "$HOME/.config" * If "$HOME/.calcurse" exists, then it will be used instead for backward compatibility. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Make io_check_dir() create parent directoriesNitroretro2019-12-231-5/+27
| | | | Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Fix next recurrent appointment deletedLars Henriksen2019-12-231-1/+10
| | | | | | | | | | | If the notify bar displays a recurrent appointment after midnight as next upcoming appointment, the bar is not updated when the appointment/occurrence is deleted. The problem is not seen in 4.3.0 because of the bug described in commit 8cbd456, Fix next recurring appointment. The problem and the solution is the same, this time in the function notify_same_recur_item(). Signed-off-by: Lars Henriksen <LarsHenriksen@get2net.dk> Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Fix empty string in updatestring()Lars Henriksen2019-12-231-3/+9
| | | | | | | | If the update results in an empty string (return value GETSTRING_RET), the original string remains whereas it should be empty. Signed-off-by: Lars Henriksen <LarsHenriksen@get2net.dk> Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* .gitignore: add test/*.{log,trs}Lukas Fleischer2019-12-231-0/+2
| | | | Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* calcurse-caldav: Document configuration for YahooLukas Fleischer2019-11-091-3/+26
| | | | | Suggested-by: Tony Barganski <tonybarganski@outlook.com> Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Make the text for empty days configurableLars Henriksen2019-11-035-1/+27
| | | | | | | The default is "--"; a single space makes the text invisible. Signed-off-by: Lars Henriksen <LarsHenriksen@get2net.dk> Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Allow discarding a todo item from the priority promptLukas Fleischer2019-11-031-2/+4
| | | | Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Support RET to set the todo item priority to 0Issam Maghni2019-11-031-4/+7
| | | | Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Fix save of interactively imported dataLars Henriksen2019-11-031-0/+4
| | | | | | Adresses Github issue #249. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* calcurse-caldav: handle objects with status code 404Si Yong Kim2019-11-031-0/+10
| | | | | | | | | Display a warning if any of the events reported by the server cannot be found instead of bailing out. Addresses GitHub issue #137 and #245. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Release 4.5.1v4.5.1Lukas Fleischer2019-10-183-2/+16
| | | | Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* test/Makefile.am: Add apts-dst to EXTRA_DISTLukas Fleischer2019-10-181-0/+1
| | | | Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Test for DST and recurrent itemsLars Henriksen2019-10-183-1/+317
| | | | | Signed-off-by: Lars Henriksen <LarsHenriksen@get2net.dk> Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* DST and recurrent itemsLars Henriksen2019-10-181-35/+36
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The patch adresses two issues with the function recur_item_find ocurrence(), one major: mktime(), and one minor: item duration. In addition, some refactoring is done. The following recurrent appointments demonstrate the problems (as described in the message) and are used as test cases in the associated test commit. 03/29/2019 @ 12:00 -> 03/30/2019 @ 11:00 {2D -> 04/03/2019} |two-day - every other day - not on 1/4 03/31/2019 @ 12:00 -> 03/31/2019 @ 13:00 {1D -> 04/01/2019} |daily - not on 31/3, twice on 1/4 03/31/2019 @ 04:00 -> 03/31/2019 @ 05:00 {1W} |weekly - appears after one week 03/31/2019 @ 12:00 -> 03/31/2019 @ 12:00 {1M} |monthly - never appears 03/31/2019 @ 12:00 -> 03/31/2019 @ 12:00 {1Y} |yearly - never appears 10/20/2019 @ 00:00 -> 10/21/2019 @ 01:00 {1W -> 11/03/2019} |25 hours - ends on 27th, but continues on 28th 03/24/2019 @ 00:00 -> 03/25/2019 @ 00:00 {1W -> 04/07/2019} |24 hours - does not continue on April 1 The root cause is two mktime() calls in recur_item_find_occurrence(), both of which use an inherited tm_isdst value in the tm structure. In such cases mktime() will "normalize" the tm stucture if tm_isdst is 0 or 1 and in disagreement with the rest of the tm contents (just like 32 May will be normalized to 1 June). Example. In 2019 DST started on 31/3 at 02:00:00 (in the European Union). If the (local) time "31/3/2018 00:00:00" is passed to mktime() with tm_isdst = 0, the return value is (say) T sec and the tm structure is unchanged, because DST is not in effect at midnight. If the same call is performed with tm_isdst = 1, the return value becomes (T - 3600) sec and the tm structure is normalized to "30/3/2018 23:00:00", tm_isdst = 0. In recur_item_find_occurrence(), the normalized tm structure with wrong day and time is used in ensuing calculations, leading to wrong dates and the errors observed. The first mktime() call is used to calculate the "day span" of the occurrence before the occurrence itself has been determined. But once the occurence is known, the "day span" is easily determined, and there is no need for the first mktime() call. Events have no explicit duration. However, recur_event_find_occurrence() and recur_event_inday() set the duration of an event to DAYINSEC before passing it on to recur_item_find_occurrence(). The value is not correct on the day when DST begins or ends. The interpretation of the daylength should be left to the called function. Hence, duration is set to -1 to signal no (explicit) duration. Signed-off-by: Lars Henriksen <LarsHenriksen@get2net.dk> Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Test cases for "Fix monthly and yearly recurrence algorithms"Lars Henriksen2019-09-063-1/+35
| | | | | Signed-off-by: Lars Henriksen <LarsHenriksen@get2net.dk> Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Set time-of-day consistently to midnight for until dayLars Henriksen2019-09-062-8/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A day begins on midnight (inclusive) and ends on midnight (exclusive). A day as a whole is represented by the initial midnight, i.e. time-of-day is 00:00. On load of recurrent appointments (but not events) time-of-day for the until day is set to 23:59. For a newly created recurrent appointment the setting depends on the input method: time-of-day is set to 00:00 if until day is given as a date (day, month and year), but to time-of-day for the start day if given as an offset (+dd). The resulting behaviour is only visible in interactive use of calcurse as proved by the following scenario. 1) Create an appointment with start time 12:00, end time 11:59 (multi day). 2) Turn it into a recurrent appointment of type daily, frequency 3, until day +3. The appointment is correctly displayed with two 2-day occurrences three days apart. 3) Edit the appointment and select Repetition. Accept existing type, frequency and end day (now as a date). The second day of the second occurrence disappears. 4) Repeat 3), but set the end day as an offset (+3). The second day of the second occurrence reappears. The inconsistencies have been eliminated, and time-of-day for the until day is now always 00:00. Also, until day may equal start day, so midnights should be compared. Signed-off-by: Lars Henriksen <LarsHenriksen@get2net.dk> Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
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