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Keep order of chapters when removing duplicates

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This commit is contained in:
schroda
2024-04-29 12:37:11 +02:00
parent 045c60c828
commit 3f507e0a30
1 changed files with 12 additions and 9 deletions
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21
src/lib/data/Chapters.ts
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@@ -320,15 +320,18 @@ export class Chapters {
static removeDuplicates<T extends ChapterScanlatorInfo & ChapterNumberInfo>(currentChapter: T, chapters: T[]): T[] {
const chapterNumberToChapters = Object.groupBy(chapters, ({ chapterNumber }) => chapterNumber);
return Object.values(chapterNumberToChapters)
.map(
(groupedChapters) =>
// the result of groupBy can't result in undefined values
groupedChapters!.find((chapter) => chapter.id === currentChapter.id) ??
groupedChapters!.findLast((chapter) => chapter.scanlator === currentChapter.scanlator) ??
groupedChapters!.slice(-1)[0],
)
.sort((a, b) => b.chapterNumber - a.chapterNumber);
const uniqueChapters = Object.values(chapterNumberToChapters).map(
(groupedChapters) =>
// the result of groupBy can't result in undefined values
groupedChapters!.find((chapter) => chapter.id === currentChapter.id) ??
groupedChapters!.findLast((chapter) => chapter.scanlator === currentChapter.scanlator) ??
groupedChapters!.slice(-1)[0],
);
// keep the chapters in the same order as they were passed
return chapters
.map(({ id }) => uniqueChapters.find((chapter) => chapter.id === id))
.filter((chapter): chapter is T => !!chapter);
}
static getNextChapter<Chapter extends ChapterScanlatorInfo & ChapterNumberInfo & ChapterReadInfo>(