export function filterResources()

in _includes/relatedresources/RelatedResources.11ty.tsx [23:65]

29 lines of code
6 McCabe index (conditional complexity)


export function filterResources({
	currentResource,
	items,
}: FilterItemsProps): Resource[] {
	const currentTopics = currentResource.topics;
	let scoredItems: ScoredItem[] = items
		// Never include the current resource as a related resource
		.filter((item) => item.url !== currentResource.url)

		// Check channels
		.filter((item) => {
			if (!currentResource.channel) {
				// This request didn't ask for a channel
				return true;
			} else {
				if (item.channel === undefined) {
					// Allow resources outside a channel
					return true;
				}
				// Check if this item's channel matches this resource's channel
				return item.channel === currentResource.channel;
			}
		})

		// Now get a tuple of (intersectionCount, resource) to "score" the
		// overlap between the tags
		.map((resource) => {
			// currentResource and/or this item might not have a topics field
			let score: number = 0;
			if (currentTopics && currentTopics.length) {
				score = currentTopics.filter((x) => {
					return resource.topics && resource.topics.includes(x);
				}).length;
			}
			return { score, item: resource };
		});

	// Reverse sort the scored items
	scoredItems.sort((a, b) => b.score - a.score);

	// Unpack just the resource
	return scoredItems.map((scoredItem) => scoredItem.item).slice(0, ITEM_LIMIT);
}