On Monday, October 5, 2020 at 3:32:51 AM UTC-7, Anthony wrote:
>
> 1. When one uses the '....MMDD' date format then the event (e.g. birth) is
> also included for years before that event - I can't quite decide whether
> it's okay for this to happen so I'm wondering whether there's a way to
> include a 'start date' for a re-occurring event?
>
The "event tiddler" format is a single tiddler containing multiple events
listed as one event per line of text.
and the "start-date/end-date" fields are only used when creating individual
"Timelines and Journals" tiddlers.
As you noted, the "....MMDD" date format is for annual events, regardless
of the year.
You can, of course, specify repeating birthdays events using multiple
"YYYYMMDD" entries.
Thus:
....0724;Eric's Birthday
vs.
20200724;Eric's Birthday
20210724;Eric's Birthday
20220724;Eric's Birthday
20230724;Eric's Birthday
20240724;Eric's Birthday
2. I thought it would be appropriate to use a field to store, let's say,
> date of birth or death and then use some 'mechanism' to put the event into
> an events tagged tiddler. I'm still learning about what 'mechanism' might
> do this and I may be completely misunderstanding the use of fields but is
> this a reasonable approach?
>
You could use a button gets "birthdate" and "deathdate" values from fields,
and then generates an "events tiddler".
Here's something I just cooked up:
\define birthday_tiddler() BirthdayList
\define lifetime() [range[$(birthyear)$,$(deathyear)$]]
\define makebirthdays()
<$vars newline="
">
<$vars birthyear={{{ [{!!birthdate}split[]first[4]join[]] }}}> <!-- YYYY
-->
<$vars birthdate={{{ [{!!birthdate}split[]rest[4]join[]] }}}> <!-- MMDD
-->
<$vars deathyear={{{ [{!!deathdate}split[]first[4]join[]] }}}> <!-- YYYY
-->
<$set name="deathyear" value=<<deathyear>> emptyValue={{{
[<birthyear>add[100]] }}} >
<$button> add birthdays to <$text text=<<birthday_tiddler>>/>
<$list filter=<<lifetime>> variable="year">
<$vars event={{{ [<year>addsuffix<birthdate>addsuffix[;Birthday:
]addsuffix<currentTiddler>addsuffix<newline>] }}}>
<$list filter="[<birthday_tiddler>!search:text:literal<event>]">
<$action-setfield tag="events" type="text/plain" text={{{
[{!!text}addsuffix<event>] }}}/>
</$list>
</$vars>
</$list>
</$button>
\end
<$list filter="[<currentTiddler>has[birthdate]]"> <<makebirthdays>> </$list>
Place the above code into a tiddler, "MakeBirthdays", tagged with
"$:/tags/ViewTemplate".
Then, create a tiddler, e.g, "John Smith" with a "birthdate" field
containing a YYYYMMDD
value and an optional "deathdate" field containing another YYYYMMDD value
Because "MakeBirthdays" is tagged with $:/tags/ViewTemplate and "John Smith"
contains a "birthdate" field, this will automaticaly show the "add
birthdays" button at
the bottom of the "John Smith" tiddler. When you press the button, it will
generate
the birthday events based on the "birthdate" and "deathdate" values and add
them
to the "BirthdayList" tiddler
Here's how the code works:
1) First, we define a few "utility" macros:
* birthday_tiddler() is just a convenience so we can easily change the
output tiddler name
* lifetime() is used to construct the filter syntax needed to generate a
range of years, based on the birthdate and deathdate field values
2) Next, the makebirthdays() macro does the work:
* $vars newline=... defines a variable for inserting a literal newline into
the output tiddler. Note the linebreak in between the quotes is important!
* $vars birthyear=... extracts the YYYY from the "birthdate" field of the
current tiddler
* $vars birthdate=... extracts the MMDD from the "birthdate" field of the
current tiddler
* $vars deathyear=... extracts the YYYY from the "deathdate" field of the
current tiddler
* $set name="deathyear" ... does a "fixup" if there is no defined
"deathdate" value, using birthyear+100 as a fallback value
* $button starts the definition of the button
* The first $list filter=<<lifetime>> ... loops through the range of years
from birthyear to deathyear
* $vars event=... constructs the event syntax output for the current year
* The second $list searches the birthday_tiddler text to make sure that the
event hasn't already been added
* $action-setfield appends the event syntax for the current year to the
current content of the output tiddler
3) Following the macro:
* $list filter="[<currentTiddler>has[birthdate]]" limits the
<<makebirthdays> button to only appear in tiddlers that have a non-blank
birthdate field
Hope this all makes sense!
enjoy,
-e
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