feat: allow display of all languages at once

Author: sinedied

HOW_TO_USE.md

@@ -27,7 +27,7 @@ You can customize the catalog view by adding the following parameters to the URL
 
 - `sub=<tag_list>`: Filter the catalog by tags (coma-separated). Tags defined in the `sub` parameter will not be displayed nor changeable by the users, and they'll be able to filter using search or additional tags as usual.
 
-- `lang=<language>`: Filter the catalog by language. The language must be a valid [ISO 639-1](https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes) 2-letter code.
+- `lang=<language>`: Filter the catalog by language. The language must be a valid [ISO 639-1](https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes) 2-letter code. You can also disable the language filter by setting the value to `all`.
 
 ## 🚀 Create a new workshop
 

packages/website/src/app/catalog/content-filter.ts

@@ -11,7 +11,7 @@ export function matchEntry(workshop: ContentEntry, filter: ContentFilter) {
   const matchTitle = searchTooShort || workshop.title.toLowerCase().includes(filter.search);
   const matchDescription = searchTooShort || workshop.description.toLowerCase().includes(filter.search);
   const matchTag = searchTooShort || workshop.tags.some((tag) => tag.toLowerCase().includes(filter.search));
-  const matchLanguage = workshop.language === filter.language;
+  const matchLanguage = filter.language === 'all' || workshop.language === filter.language;
   const matchTags = filter.tags.length === 0 || filter.tags.every((tag) => workshop.tags.includes(tag));
 
   return (matchTitle || matchDescription || matchTag) && matchLanguage && matchTags;