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Get carousel books from the DB

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This commit is contained in:
Mike Colagrosso 2024-06-29 11:41:56 -06:00 • committed by Alex Cabal
parent 402dae95ff
commit 2d5e66f2f2
2 changed files with 30 additions and 40 deletions
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41
lib/Library.php
View file

@ -126,19 +126,6 @@ class Library{
return self::GetFromApcu('author-' . $wwwFilesystemPath);
}
/**
* @return array<Ebook>
*/
public static function GetEbooksByTag(string $tag): array{
try{
/** @var array<Ebook> */
return apcu_fetch('tag-' . $tag) ?? [];
}
catch(Safe\Exceptions\ApcuException){
return [];
}
}
/**
* @return array<Collection>
* @throws Exceptions\AppException
@ -173,6 +160,34 @@ class Library{
return $ebooks;
}
/**
* @return array<Ebook>
*/
public static function GetRelatedEbooks(Ebook $ebook, int $count, ?EbookTag $relatedTag): array{
if($relatedTag !== null){
$relatedEbooks = Db::Query('
SELECT e.*
from Ebooks e
inner join EbookTags et using (EbookId)
where et.TagId = ?
and et.EbookId != ?
order by RAND()
limit ?
', [$relatedTag->TagId, $ebook->EbookId, $count], Ebook::class);
}
else{
$relatedEbooks = Db::Query('
SELECT *
from Ebooks
where EbookId != ?
order by RAND()
limit ?
', [$ebook->EbookId, $count], Ebook::class);
}
return $relatedEbooks;
}
/**
* @return array<EbookTag>
*/

29
www/ebooks/ebook.php
View file

@ -12,6 +12,7 @@ $scanSources = [];
$otherSources = [];
$carousel = [];
$carouselTag = null;
$targetCarouselSize = 5;
try{
$urlPath = trim(str_replace('.', '', HttpInput::Str(GET, 'url-path') ?? ''), '/'); // Contains the portion of the URL (without query string) that comes after https://standardebooks.org/ebooks/
@ -64,36 +65,10 @@ try{
}
}
// Generate the bottom carousel.
// Pick a random tag from this ebook, and get ebooks in the same tag
$ebooks = [];
if(sizeof($ebook->Tags) > 0){
$carouselTag = $ebook->Tags[rand(0, sizeof($ebook->Tags) - 1)];
$ebooks = Library::GetEbooksByTag(strtolower($carouselTag->Name));
}
else{
$ebooks = Library::GetEbooks();
}
shuffle($ebooks);
$targetCarouselSize = 5;
// Use <= here because we want to exclude the ebook we're looking at from the carousel.
// One of the matching ebooks will always be the current ebook.
if(sizeof($ebooks) <= $targetCarouselSize){
$targetCarouselSize = sizeof($ebooks) - 1;
}
if($targetCarouselSize > 0){
$i = 0;
while(sizeof($carousel) < $targetCarouselSize){
if(isset($ebooks[$i]) && $ebooks[$i]->Url !== $ebook->Url){
$carousel[] = $ebooks[$i];
}
$i++;
}
}
$carousel = Library::GetRelatedEbooks($ebook, $targetCarouselSize, $carouselTag);
}
catch(Exceptions\SeeOtherEbookException $ex){
http_response_code(301);