Looking for some assistance in relation to a filter I’m trying to write.
Here are the steps I need the filter to take:
Find tiddlers whose primary-topic field contains the current tiddler
Extract all links ( [[ ]] ) from those tiddlers’ text fields
Deduplicate and sort those links alphabetically, then show each link to user in list.
For each link, find tiddlers that both reference the current tiddler in primary-topic AND contain that specific link in their text field
Display those tiddlers under each link
The above would be option 1. Option 2 would be the following:
Find tiddlers whose primary-topic field contains the current tiddler
Extract all links ( [[ ]] ) from those tiddlers’ text fields
Deduplicate and sort those links alphabetically, then show each link to user in list.
Allow user to select (check) one or more links. Each selection “runs” a filter that finds all tiddlers that both reference the current tiddler in primary-topic AND contains the selected links in their text field.
Display those tiddlers on the right side of the screen (or even on another tiddler…not picky here).
I would suggest not trying to jam this into one filter but use a filter in a list widget for points 1-3, then with in that list widget address items 4-5.
Maybe even break it apart further. Once you have a working solution you may be able to simplify further.
As Tony pointed out, in no way can you do this with 1 filter. Your options 1 and 2 are 2 relatively complex constructions.
Here is a text-case for the first option how I did understand it.
Create a tiddler named eg: link-backlink-primary-topic
tag: $:/tags/wiki-test-spec
caption: Link, Backlinks and primary-topic
With the following content:
title: Narrative
* Find tiddlers whose primary-topic field contains the current tiddler
* Extract all links ( [[ ]] ) from those tiddlers’ text fields
* Deduplicate and sort those links alphabetically, then show each link to user in list.
* For each link, find tiddlers that both reference the current tiddler in primary-topic AND contain that specific link in their text field
* Display those tiddlers under each link
+
title: Output
\procedure list-linksX(filter) <$text text=<<filter>>/>
\procedure list-primary(currentTiddler)
currentTiddler: <<currentTiddler>>
<ul>
<$list filter="[primary-topic<currentTiddler>]" variable="primaryItem">
<li><<currentTiddler>> is a primary-topic in: <$link to=<<primaryItem>>/></li>
<ul>
<$list filter="[<primaryItem>links[]]" variable="listItem">
<li>contains a link to: <$link to=<<listItem>>/></li>
<ul>
<<listItem>> is a primary-topic in: <$transclude $variable="list-links" filter="[primary-topic<listItem>]"/>
tiddlers that link to <<listItem>>: <$list filter="[<listItem>backlinks[]]" join=", "/><br>
tiddlers that link to <<listItem>>: <$transclude $variable="list-links" filter=`[[$(listItem)$]backlinks[]]`/>
</ul>
</$list>
</ul>
</$list>
</ul>
\end
<<list-primary "topic-1">>
---
<<list-primary "topic-2">>
+
title: topic-1
topic-1 links to [[link-1]] and [[link-2]]
+
title: topic-2
topic-1 links to [[link-3]] and [[link-4]]
+
title: link-1
primary-topic: topic-1
[[link-1-1]]
+
title: link-2
primary-topic: topic-2
[[link-2-2]]
+
title: test
primary-topic: link-1-1
+
title: test-2
[[link-1-1]]
+
title: link-1-1
link-1-1 is a primary-topic in tiddler: [[test]]
It creates a testcase widget with which you can play with.
The procedure list-linksX(filter) is for testing only.
The procedure \procedure list-primary(currentTiddler) is for easier testing and it can be converted to a template if needed.
I did try to add some text, that should explain what’s going on.
Ultimatly you could generate a lists of titles, if necessary wikifying the output of a nested list structure (Not recommended) then feed this into a new listing mechanisium that then performs a break on each source tiddler.
But the additional filter run prefixes can be used to recursive lists, but calling functions (filters)
