Templates: various questions not worth their own thread

[ownedbycats]

Also while making that template I noticed if I accidentally put $$fanficcat (which is a column that does not exist), the first clause returned for every book. Is this intended?

[chaley]

Do you mean the slashes in this statement?

list_re($tags, ',', '\.', '\')

For me, those are backslashes. The character '/' is a forward slash.

Unfortunately the regexp-based template language lexical analyser cannot handle escaped backslashes. To do what you want you must use some other character.

Also, how would you apply a sublist of just first item to the list_re? See the third item in the screenshot. I tried enclosing it but I broke it. This is for my #kobopath composite for a save template.

Do I understand you correctly, that you want to apply a regexp to the first item in a list? If so then do something like (not tested)

re(sublist($tags, 0, 1, ','), '^(.*?)($|\..*$)', '\1')

[chaley]

Originally Posted by ownedbycats

Also while making that template I noticed if I accidentally put $$fanficcat (which is a column that does not exist), the first clause returned for every book. Is this intended?

Yes. $$ means raw_field. A non-existent field returns 'None'.

[ownedbycats]

I found a post saying that both slashes could be used and it'll be normalized, so I switched it:

program:

if $$#fanficcat then
		re(sublist($tags, ',', 0, 1), '\.', '/')

elif $formats == 'PDF' then
   'PDF'

else
		re(sublist($tags, ',', 0, 1), '^(.*?)($|\..*$)', '\1')
fi

Unfortunately now I am getting an invalid literal for int() with base 10: ',' What happened?

[chaley]

Originally Posted by ownedbycats

I found a post saying that both slashes could be used and it'll be normalized, so I switched it:

program:

if $$#fanficcat then
		re(sublist($tags, ',', 0, 1), '\.', '/')

elif $formats == 'PDF' then
   'PDF'

else
		re(sublist($tags, ',', 0, 1), '^(.*?)($|\..*$)', '\1')
fi

Unfortunately now I am getting an invalid literal for int() with base 10: ',' What happened?

Because I (and you) didn't get the arguments to sublist right. They are

sublist(list_string, start_index, end_index, separator)

We both put the separator as the second argument instead of the 4th.

[ownedbycats]

program:

# Returns 'Fanfiction/Fandom' for fanfics
	if $$#fanficcat then
		re(sublist($tags, 0, 1, ','), '\.', '/')

# Returns 'PDF' for PDFs
	elif $formats == 'PDF' then
		'PDF'

# Returns topmost tag for all other books
	else
		re(sublist($tags, 0, 1, ','), '^(.*?)($|\..*$)', '\1')

	fi

this works!

[ownedbycats]

Question: If you have two if statements that are mutually exclusive:

program:
	if $#enum== 'foo' then
		'foo'

	else $#enum == 'bar' then
		'bar'

	fi

does it matter what order they are in, as long as the other statements are all in the right order?

[chaley]

Originally Posted by ownedbycats

Question: If you have two if statements that are mutually exclusive:

program:
	if $#enum== 'foo' then
		'foo'

	else $#enum == 'bar' then
		'bar'

	fi

does it matter what order they are in, as long as the other statements are all in the right order?

Functionally, no, as long as you can truly guarantee mutual exclusivity. However, there might be differences in performance. The most common ones should be first.

[ownedbycats]

In regards to this:

Nope, the data that is copied is the data you see, formatted as you
specify in the tweaks. Doing anything else would be magic, a DWIMNWIS
(Do What I Mean Not What I Say) moment.

If you want to copy exact timestamps then you need to use the "template"
source and raw_field() to get the full timestamp, then store that
timestamp where you wish. (Yes, it can be more complicated than this.)

Outside of Action Chain's single-field edit, where do I do this?

[chaley]

Originally Posted by ownedbycats

In regards to this:

Outside of Action Chain's single-field edit, where do I do this?

Your bug report was about multiple book search and replace. That dialog in regexp mode supports "Template" as the source field.

[ownedbycats]

I see it now.

[ownedbycats]

Question: Can a gpm statement be used for a save template?

I currently have a #kobopath gpm composite which then passes itself into my save templates; I thought I could skip that intermediary step.

[chaley]

Originally Posted by ownedbycats

Question: Can a gpm statement be used for a save template?

I currently have a #kobopath gpm composite which then passes itself into my save templates; I thought I could skip that intermediary step.

No. Save templates are basic python templates, not calibre ones. You can't do anything that isn't described here.

Why? These templates predate the template language by several years.

[ownedbycats]

Ok. That's good to know that before I started trying to kludge something together.

[ownedbycats]

This (it's still a WIP; I am still debating whether this will be better than multiple non-template rules) returns a syntax error about an unexpected end of program near "unknown." Where exactly is the mistake?

program:
	vl = $#vls;
	pc = $$#pagecount;
	fmt = $$#formats;
	lang = $$#languages

	if
		'Cleanup' in vl
	then
		
# Checks for a missing format
		if
			fmt == ''
		then
			'add_book.png'
		fi
			
# Checks for a missing pagecount
		if
			pc == 'None'
		then
			'cover_flow.png'
		fi
		
# Checks for a missing language
		if
			lang == 'None'
		then
			'languages.png'
		fi
		
# Checks for an ORIGINAL_EPUB in formats
		if
			fmt == 'ORIGINAL_EPUB'
		then
			'add_book.png'
		fi

# Returns a generic icon if no specific issue is flagged
	else 
		'polish.png'
	fi