Re: XML to ConTeXt: converting date attribute from ISO date

From: Hans Hagen <j.hagen@xs4all.nl>
To: Axel Kielhorn <tex@axelkielhorn.de>,
	"ntg-context@ntg.nl >> mailing list for ConTeXt users"
	<ntg-context@ntg.nl>
Subject: Re: XML to ConTeXt: converting date attribute from ISO date
Date: Wed, 11 Mar 2020 15:01:27 +0100	[thread overview]
Message-ID: <e1c2b63f-d50a-8df4-b071-4af31e615497@xs4all.nl> (raw)
In-Reply-To: <0A369B6F-3AB7-41E2-9682-0BA89034CAF8@axelkielhorn.de>

On 3/11/2020 2:14 PM, Axel Kielhorn wrote:
> 
> 
>> Am 15.08.2018 um 14:04 schrieb Hans Hagen <j.hagen@xs4all.nl>:
>>
>> On 8/15/2018 12:27 PM, Mike O'Connor wrote:
>>> G’Day,
>>> Having a first go at converting TEI XML to ConTeXt.
>>> Steep learning curve, but easier (for me) than XSLT, and first results were amazing.  Using http://www.pragma-ade.com/general/manuals/xml-mkiv.pdf as a guide.
>>> Currently stuck on converting an ISO format date (eg. 1908-01-10) into something more readable (eg. 10 January 1908) in the output.  I presume I should create a function (?luacode) that can take any ISO value and output the readable form.  The following works but seems to me inefficient.
>>> Grateful for any pointers.
>>> Mike
>>> Here is my MWE:
>>> \startbuffer[demo]
>>> <TEI>
>>>      <text>
>>>          <body>
>>>              <div type="letter">
>>>                  <opener>
>>>                      <date when-iso="1908-01-10" type="divDate">10.I.08</date>
>>>                  </opener>
>>>                  <closer>
>>> <date when-iso="1908-03-19" type="secondDate">19 Mar '08</date>
>>>                  </closer>
>>>              </div>
>>>          </body>
>>>      </text>
>>> </TEI>
>>> \stopbuffer
>>> \startxmlsetups xml:initialize
>>> \xmlsetsetup{#1}{date}{xml:date}
>>> \stopxmlsetups
>>> \xmlregistersetup{xml:initialize}
>>> \startxmlsetups xml:date
>>> \xmldoifelse {#1}{.[@type='divDate']} {
>>> \def\docdate{\ctxlua{
>>> local tyear = string.sub('\xmlatt{#1}{when-iso}',1,4)
>>> local tmonth = string.sub('\xmlatt{#1}{when-iso}',6,7)
>>> local tday = string.sub('\xmlatt{#1}{when-iso}',9,10)
>>> context.date{d = tday, m = tmonth, y = tyear}
>>> }}
>>> \docdate[day,month,year] = Document Date \par
>>>      } {
>>> \def\docdate{\ctxlua{
>>> local tyear = string.sub('\xmlatt{#1}{when-iso}',1,4)
>>> local tmonth = string.sub('\xmlatt{#1}{when-iso}',6,7)
>>> local tday = string.sub('\xmlatt{#1}{when-iso}',9,10)
>>> context.date{d = tday, m = tmonth, y = tyear}
>>> }}
>>> \docdate[day,month,year] = Event Date\par
>>> }
>>> \stopxmlsetups
>>> \starttext
>>> \xmlprocessbuffer{main}{demo}{}
>>> \stoptext
>> Can be wikified ...
>>
>> \startluacode
>>     function xml.finalizers.tex.MyDate(e,what,how)
>>         local t = string.split(e[1].at[what],"-")
>>         context.date(
>>             { y = t[1], m = t[2], d = t[3] },
>>             { how }
>>         )
>>     end
>> \stopluacode
>>
>> \startxmlsetups xml:date
>>
>> 	\xmldoifelse {#1}{.[@type='divDate']} {
>>         \xmlfilter{#1}{./MyDate("when-iso","day,month,year")}\
>>     	Document Date \par
>>     } {
>>         \xmlfilter{#1}{./MyDate("when-iso","day,month,year")}\
>>         Event Date\par
>>
>> 	}
>> \stopxmlsetups
> 
> I couldn’t get this to work.
> Had to change it to:
> 
> \startluacode
>     function xml.finalizers.tex.MyDate(e,what,how)
>         local ee = e[1].at[what]
>         local t = (string.split(ee,"-"))
>         context.date(
>             { y = t[1], m = t[2], d = t[3] },
>             { how }
>         )
>     end
> \stopluacode
You mean the () around the split? weird. Anyway, there's also a time 
splitter (dedicated to Alan who needed one):

print(os.time(utilities.parsers.totime("2019-03-05 12:12:12")))
print(os.time(utilities.parsers.totime("2019/03/05 12:12:12")))
print(os.time(utilities.parsers.totime("05-03-2019 12:12:12")))
print(os.time(utilities.parsers.totime("05/03/2019 12:12:12")))

inspect(utilities.parsers.totime("2019-03-05 12:12:12"))
inspect(utilities.parsers.totime("2019/03/05 12:12:12"))
inspect(utilities.parsers.totime("05-03-2019 12:12:12"))
inspect(utilities.parsers.totime("05/03/2019 12:12:12"))


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