User:Chao

<!-- MAIN ARTWORK -->
{{ User:Chao | {{{1}}} | Main Artwork | | h2 | Main Artwork }}

<!-- SPRITES -->
{{#ifeq: 0 | {{#expr:
  {{#ask:[[Category:Kagura Mutsuki]][[Category:Battle]]|format=count}} +
  {{#ask:[[Category:Kagura Mutsuki]][[Category:Palette Reference]]|format=count}} + 
  {{#ask:[[Category:Kagura Mutsuki]][[Category:Portraits]]|format=count}}
  }}
  | <!-- all three subcategories are empty, don't make a section header-->
  | <h2> Sprites </h2> 
    {{ User:Chao | Kagura Mutsuki | Battle | | h3 | Battle }}
    {{ User:Chao | Kagura Mutsuki | Palette Reference | | h3 | Palette Reference }}
    {{ User:Chao | Kagura Mutsuki | Portraits | | h3 | Portraits }}
}}

Works for multiple categories (here, "Kagura Mutsuki", "Story", and (the optional) "Chrono Phantasma")
{{ User:Chao | Kagura Mutsuki | Story | Chrono Phantasma | h2 | Chrono Phantasma }}

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Technical Notes

Template: Gallery

Creates a gallery from template for the specified character. It will skip sections and subsections that the character does not have images for.

Template Usage

   {{ Gallery | {{PAGENAME}} }}   <-- with the idea that {{PAGENAME}} will evaluate to ie. Kagura Mutsuki
OR {{ Gallery | Kagura Mutsuki }} <-- this will also work

Template Code

<!-- MAIN ARTWORK -->
{{ Gallery Section | {{{1}}} | Main Artwork | | h2 | Main Artwork }}

<!-- SPRITES -->
{{#ifeq: 0 | {{#var:Battle}} + {{#var:Palette Reference}} + {{#var:Third Category}}
  | <!-- all three subcategories are empty, don't make a section header-->
  | <h2> Sprites </h2> 
    {{ Gallery Section | {{{1}}} | Battle | | h2 | Battle }}
    {{ Gallery Section | {{{1}}} | Palette Reference | | h3 | Palette Reference }}
    {{ Gallery Section | {{{1}}} | Portraits | | h2 | Portraits }}
}}

...

<!-- and so on with other categories and sub-categories -->

Template: Gallery Section

Creates a section header with the specified depth (h2, h3, h4, h5), and a gallery of all images that contain the two specified tags. If there are no images in the specified gallery, this code will not do anything. (That is, it is safe to call even when "Kagura Mutsuki" does not have images in "XBlaze" -- an extraneous "XBlaze" header will not appear on Kagura's gallery page.)

Template Usage

{{ Gallery Section
  | Kagura Mutsuki  <-- {{{1}}} Character name (Image category 1)
  | Main Artwork    <-- {{{2}}} Image Category 2
  |                 <-- {{{3}}} Optional Image Category 3
  | h2              <-- {{{4}}} Header depth (h2, h3, h4, h5)
  | Main Artwork    <-- {{{5}}} Section header. 
}}

ie. {{ Gallery Section | Kagura Mutsuki | Main Artwork | | h2 | Main Artwork }}

Template Code

{{#vardefine: {{{2}}} {{{3}}} |
  {{#ask:
    [[Category: {{{1}}} ]]
    [[Category: {{{2}}} ]]
    {{#if:{{{3|}}}
      | [[Category: {{{3}}} ]] | }}
    | format=count
  }}
}}{{#ifeq: 0 | {{#var: {{{2}}} {{{3}}} }} | <!-- do nothing if no images --> |
  {{#switch:{{{4}}}
    |h2=<h2>{{{5}}}</h2>
    |h3=<h3>{{{5}}}</h3>
  }}
  {{#ask:
    [[Category:{{{1}}}]]
    [[Category:{{{2}}}]]
    {{#if:{{{3|}}}
      | [[Category: {{{3}}} ]] | }}
    |?caption
    |format=gallery
    |autocaptions=no
    |captionproperty=?caption
    |perrow=7
    |overlay=yes
  }}
}}

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Useful References

Modules

• Overview of WikiMedia Lua
• Getting Started with MediaWiki Lua
• Basic Guide to Wikipedia Lua
• How to Write Readable Code
• Debugging Lua

Semantic MediaWiki

• Documentation for the Lua Module"s implementation of #ask, mw.smw.ask
• How to use SMW (#ask) to sort and query unions of categories
• How to use arbitrary variables in an SMW (#ask) query ie {{FULLPAGENAME}}

DPL

• https://en.wikinews.org/wiki/Wikinews:DynamicPageList
• https://www.mediawiki.org/wiki/Extension:DynamicPageList_(Wikimedia)
• http://followthescore.org/dpldemo/index.php?title=DPL:FAQ

Other things to look into later:

• CategoryTree extension
• https://meta.wikimedia.org/wiki/Help:Category
• categories of categories

Note: I believe it"s good wikimedia practice to use only ==H2== and beyond (in essence, to avoid using =H1=)