Support json as an output option for most commands

AUTHORS.txt

@@ -54,3 +54,4 @@ Raúl Medina - raulmgcontact [at] gmail (dot] com
 Matthew Rademaker - matthew.rademaker [at] gmail [dot] com
 Valentin Iovene - val [at] too [dot] gy
 Julian Wollrath
+Mattori Birnbaum - me [at] mattori [dot] com - https://mattori.com

CHANGELOG.rst

@@ -17,6 +17,7 @@ not released yet
 * NEW properties of ikhal themes (dark and light) can now be overriden from the
   config file (via the new [palette] section, check the documenation)
 * NEW timedelta strings can now have a leading `+`, e.g. `+1d`
+* NEW Add `--json` option to output event data as JSON objects
 
 0.11.2
 ======

doc/source/usage.rst

@@ -171,8 +171,21 @@ Several options are common to almost all of :program:`khal`'s commands
    url-separator
         A separator: " :: " that appears when there is a url.
 
+   duration
+       The duration of the event in terms of days, hours, months, and seconds
+       (abbreviated to `d`, `h`, `m`, and `s` respectively).
+
+   repeat-pattern
+       The raw iCal recurrence rule if the event is repeating.
+
+   all-day
+       A boolean indicating whether it is an all-day event or not.
+
+   categories
+       The categories of the event.
+
    By default, all-day events have no times. To see a start and end time anyway simply
-   add `-full` to the end of any template with start/end, for instance
+   add `-full` to the end of any template with start/end or duration, for instance
    `start-time` becomes `start-time-full` and will always show start and end times (instead
    of being empty for all-day events).
 
@@ -191,6 +204,40 @@ Several options are common to almost all of :program:`khal`'s commands
            khal list --format "{title} {description}"
 
 
+.. option:: --json FIELD ...
+
+   Works similar to :option:`--format`, but instead of defining a format string a JSON
+   object is created for each specified field. The matching events are collected into
+   a JSON array. This option accepts the following subset of :option:`--format`
+   template options
+
+   ::
+
+           title, description, uid, start, start-long, start-date,
+           start-date-long, start-time, end, end-long, end-date,
+           end-date-long, end-time, start-full, start-long-full,
+           start-date-full, start-date-long-full, start-time-full,
+           end-full, end-long-full, end-date-full, end-date-long-full,
+           end-time-full, repeat-symbol, location, calendar,
+           calendar-color, start-style, to-style, end-style,
+           start-end-time-style, end-necessary, end-necessary-long,
+           status, cancelled, organizer, url, duration, duration-full,
+           repeat-pattern, all-day, categories
+
+
+   Note that `calendar-color` will be the actual color name rather than the ANSI color code,
+   and the `repeat-symbol`, `status`, and `cancelled` values will have leading/trailing
+   whitespace stripped.  Additionally, if only the special value `all` is specified then
+   all fields will be enabled.
+
+   Below is an example command which prints a JSON list of objects containing the title and
+   description of all events today.
+
+   ::
+
+           khal list --json title --json description
+
+
 .. option:: --day-format DAYFORMAT
 
    works similar to :option:`--format`, but for day headings. It only has a few
@@ -231,8 +278,9 @@ shows all events scheduled for a given date (or datetime) range, with custom
 formatting:
 ::
 
-        khal list [-a CALENDAR ... | -d CALENDAR ...] [--format FORMAT]
-        [--day-format DAYFORMAT] [--once] [--notstarted] [START [END | DELTA] ]
+        khal list [-a CALENDAR ... | -d CALENDAR ...]
+        [--format FORMAT] [--json FIELD ...] [--day-format DAYFORMAT]
+        [--once] [--notstarted] [START [END | DELTA] ]
 
 START and END can both be given as dates, datetimes or times (it is assumed
 today is meant in the case of only a given time) in the formats configured in
@@ -270,7 +318,8 @@ start.
 
 ::
 
-        khal at [-a CALENDAR ... | -d CALENDAR ...] [--format FORMAT]
+        khal at [-a CALENDAR ... | -d CALENDAR ...]
+        [--format FORMAT] [--json FIELD ...]
         [--notstarted] [[START DATE] TIME | now]
 
 calendar

khal/cli.py

@@ -34,6 +34,7 @@
 from .exceptions import FatalError
 from .settings import InvalidSettingsError, NoConfigFile, get_config
 from .terminal import colored
+from .utils import human_formatter, json_formatter
 
 try:
     from setproctitle import setproctitle
@@ -313,11 +314,12 @@ def calendar(ctx, include_calendar, exclude_calendar, daterange, once,
                   )
     @click.option('--notstarted', help=('Print only events that have not started.'),
                   is_flag=True)
+    @click.option('--json', help=("Fields to output in json"), multiple=True)
     @click.argument('DATERANGE', nargs=-1, required=False,
                     metavar='[DATETIME [DATETIME | RANGE]]')
     @click.pass_context
     def klist(ctx, include_calendar, exclude_calendar,
-              daterange, once, notstarted, format, day_format):
+              daterange, once, notstarted, json, format, day_format):
         """List all events between a start (default: today) and (optional)
         end datetime."""
         try:
@@ -332,7 +334,8 @@ def klist(ctx, include_calendar, exclude_calendar,
                 once=once,
                 notstarted=notstarted,
                 conf=ctx.obj['conf'],
-                env={"calendars": ctx.obj['conf']['calendars']}
+                env={"calendars": ctx.obj['conf']['calendars']},
+                json=json
             )
             if event_column:
                 click.echo('\n'.join(event_column))
@@ -358,14 +361,15 @@ def klist(ctx, include_calendar, exclude_calendar,
                   help=('Stop an event repeating on this date.'))
     @click.option('--format', '-f',
                   help=('The format to print the event.'))
+    @click.option('--json', help=("Fields to output in json"), multiple=True)
     @click.option('--alarms', '-m',
                   help=('Alarm times for the new event as DELTAs comma separated'))
     @click.option('--url', help=("URI for the event."))
     @click.argument('info', metavar='[START [END | DELTA] [TIMEZONE] [SUMMARY] [:: DESCRIPTION]]',
                     nargs=-1)
     @click.pass_context
     def new(ctx, calendar, info, location, categories, repeat, until, alarms, url, format,
-            interactive):
+            json, interactive):
         '''Create a new event from arguments.
 
         START and END can be either dates, times or datetimes, please have a
@@ -413,6 +417,7 @@ def new(ctx, calendar, info, location, categories, repeat, until, alarms, url, f
                 alarms=alarms,
                 url=url,
                 format=format,
+                json=json
             )
         except FatalError as error:
             logger.debug(error, exc_info=True)
@@ -583,9 +588,10 @@ def printics(ctx, ics, format):
     @multi_calendar_option
     @click.option('--format', '-f',
                   help=('The format of the events.'))
+    @click.option('--json', help=("Fields to output in json"), multiple=True)
     @click.argument('search_string')
     @click.pass_context
-    def search(ctx, format, search_string, include_calendar, exclude_calendar):
+    def search(ctx, format, json, search_string, include_calendar, exclude_calendar):
         '''Search for events matching SEARCH_STRING.
 
         For recurring events, only the master event and different overwritten
@@ -604,8 +610,13 @@ def search(ctx, format, search_string, include_calendar, exclude_calendar):
             term_width, _ = get_terminal_size()
             now = dt.datetime.now()
             env = {"calendars": ctx.obj['conf']['calendars']}
+            if len(json) == 0:
+                formatter = human_formatter(format)
+            else:
+                formatter = json_formatter(json)
             for event in events:
-                desc = textwrap.wrap(event.format(format, relative_to=now, env=env), term_width)
+                desc = textwrap.wrap(formatter(
+                    event.attributes(relative_to=now, env=env)), term_width)
                 event_column.extend(
                     [colored(d, event.color,
                              bold_for_light_color=ctx.obj['conf']['view']['bold_for_light_color'])
@@ -655,9 +666,10 @@ def edit(ctx, format, search_string, show_past, include_calendar, exclude_calend
                   help=('The format of the day line.'))
     @click.option('--notstarted', help=('Print only events that have not started'),
                   is_flag=True)
+    @click.option('--json', help=("Fields to output in json"), multiple=True)
     @click.argument('DATETIME', nargs=-1, required=False, metavar='[[START DATE] TIME | now]')
     @click.pass_context
-    def at(ctx, datetime, notstarted, format, day_format, include_calendar, exclude_calendar):
+    def at(ctx, datetime, notstarted, format, day_format, json, include_calendar, exclude_calendar):
         '''Print all events at a specific datetime (defaults to now).'''
         if not datetime:
             datetime = ("now",)
@@ -675,7 +687,8 @@ def at(ctx, datetime, notstarted, format, day_format, include_calendar, exclude_
                 once=True,
                 notstarted=notstarted,
                 conf=ctx.obj['conf'],
-                env={"calendars": ctx.obj['conf']['calendars']}
+                env={"calendars": ctx.obj['conf']['calendars']},
+                json=json
             )
             if rows:
                 click.echo('\n'.join(rows))