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Allow ebooks in a collection to share the same position, like Ford Madox Ford's Parade's End books in the Modern Library's 100 Best Novels list

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Alex Cabal 2021-01-04 14:27:38 -06:00
parent 2bfcb41ec3
commit f3f6eaaa0b
1 changed files with 25 additions and 6 deletions
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31
lib/Library.php
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@ -222,12 +222,19 @@ class Library{
$collections[$urlSafeCollection] = [];
}
// Some items may have the same position in a collection,
// like _Some Do Not..._ and _No More Parades_ are both #57 in the Modern Library's 100 best novels.
// To accomodate that, we create an anonymous object that holds the sequence number as a separate value,
// then later we sort by that instead of by array index.
$sortItem = new stdClass();
$sortItem->Ebook = $ebook;
if($collection->SequenceNumber !== null){
$collections[$urlSafeCollection][$collection->SequenceNumber] = $ebook;
$sortItem->Ordinal = $collection->SequenceNumber;
}
else{
$collections[$urlSafeCollection][] = $ebook;
$sortItem->Ordinal = 1;
}
$collections[$urlSafeCollection][] = $sortItem;
}
// Create the tags cache
@ -265,10 +272,22 @@ class Library{
// Now store various collections
apcu_delete(new APCUIterator('/^collection-/'));
foreach($collections as $collection => $ebooks){
// Sort the array by key, then reindex to 0 with array_values
ksort($ebooks);
apcu_store('collection-' . $collection, array_values($ebooks));
foreach($collections as $collection => $sortItems){
// Sort the array by the ebook's ordinal in the collection. We use this custom sort function
// because an ebook may share the same place in a collection with another ebook; see above.
usort($sortItems, function($a, $b) {
if ($a->Ordinal == $b->Ordinal) {
return 0;
}
return ($a->Ordinal < $b->Ordinal) ? -1 : 1;
});
// Now pull the actual ebooks out of the anonymous objects we just sorted
$ebooks = [];
foreach($sortItems as $sortItem){
$ebooks[] = $sortItem->Ebook;
}
apcu_store('collection-' . $collection, $ebooks);
}
apcu_delete(new APCUIterator('/^tag-/'));