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Old 10-21-2011, 04:35 PM   #1
uli
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Lightbulb Plugboard: Series Contains Star Wars formatting

I'd like the plugboard to use a different formatting when the series is Star Wars or Star Trek. So I created the following, everything works except if the title contains a comma or a parenthesis.

The calibre template guide mentions you need to escape these. How can I escape a field value?

Code:
{series:contains(Star Wars|Star Trek, {title}, {series}{series_index:0>2s| - | - }{title})}

Bad Solution:
Spoiler:

Created a custom column to escape the offending commas
Code:
#clean_title
{title:re(\,,\\,)}
Code:
{series:contains(Star Wars|Star Trek, {#clean_title}, {series}{series_index:0>2s| - | - }{#clean_title})}


The solution is to use program mode in the plugboard mentioned bellow.

Last edited by uli; 10-22-2011 at 12:52 PM. Reason: solution
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Old 10-22-2011, 01:55 AM   #2
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Quote:
Originally Posted by uli View Post
I'd like the plugboard to use a different formatting when the series is Star Wars or Star Trek. So I created the following, everything works except if the title contains a comma or a parenthesis.

The calibre template guide mentions you need to escape these. How can I escape a field value?

Code:
{series:contains(Star Wars|Star Trek, {title}, {series}{series_index:0>2s| - | - }{title})}
Using template expressions inside template expressions has lots of problems. I consider it a bug that it works at all, but if I 'fixed' it I would annoy too many people. To be precise, the templates act as macros, inserting the text from the sub-evaluation then evaluating the enclosing phrase. If the sub-evaluation results in characters that are significant, then evaluating the enclosing phrase will fail.

What you should use is general program mode (see the manual) so you have control over what is evaluated, in what context. This mode permits embedding arbitrary templates as function values. For example, the above template would be written
Code:
program: contains(field('series'), 'Star Wars|Star Trek', field('title'), template('{series}{series_index:0>2s| - | - }{title}'))
This expression says that if the series field matches the regexp 'Star Wars|Star Trek' then return the title field, otherwise return the results of evaluating the template '{series}{series_index:0>2s| - | - }{title}'.
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Old 10-22-2011, 01:03 PM   #3
uli
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uli has a complete set of Star Wars action figures.uli has a complete set of Star Wars action figures.uli has a complete set of Star Wars action figures.
 
Posts: 11
Karma: 296
Join Date: Jun 2011
Location: Montreal
Device: Kobo, Calibre
Thanks, works perfectly! Now those extra long Star Wars series are readable!

Here is the final code.

Shows series as initials for Star Wars and Star Trek
Shows full series name for everything else.
ex: 'Star Wars: The New Jedi Order...' = SWTNJO - 11 - Rebel Dream
ex: Culture - 01 - Consider Phlebas

Code:
program: contains(field('series'), 'Star Wars|Star Trek', template('{series:re(([^\s])[^\s]+(\s|$),\1)}{series_index:0>2s| - | - }{title}'), template('{series}{series_index:0>2s| - | - }{title}'))
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