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@@ -58,6 +58,7 @@ class BookController extends Controller
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$book['toc'] = $this->getBookToc($bookRaw->book, $bookRaw->para, $channelId, 2, 7);
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$book['categories'] = $this->getBookCategory($bookRaw->book, $bookRaw->para);
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$book['tags'] = [];
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+ $book['pagination'] = $this->pagination($bookRaw);
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$book['content'] = $this->getBookContent($id);
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return view('library.book.read', compact('book'));
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}
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@@ -222,6 +223,100 @@ class BookController extends Controller
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return $result;
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}
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+
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+ public function pagination($book)
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+ {
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+ $currBook = $this->bookStart($book->book, $book->para);
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+ $start = $currBook->paragraph;
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+ $end = $currBook->paragraph + $currBook->chapter_len - 1;
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+ // 查询起始段落
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+ $paragraphs = PaliText::where('book', $book->book)
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+ ->whereBetween('paragraph', [$start, $end])
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+ ->where('level', '<', 8)
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+ ->orderBy('paragraph')
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+ ->get();
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+ $curr = $paragraphs->firstWhere('paragraph', $book->para);
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+ $current = $curr; //实际显示的段落
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+ $endParagraph = $curr->paragraph + $curr->chapter_len - 1;
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+ if ($curr->chapter_strlen > $this->maxChapterLen) {
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+ //太大了，修改结束位置 找到下一级
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+ foreach ($paragraphs as $key => $paragraph) {
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+ if ($paragraph->paragraph > $curr->paragraph) {
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+ if ($paragraph->chapter_strlen <= $this->maxChapterLen) {
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+ $endParagraph = $paragraph->paragraph + $paragraph->chapter_len - 1;
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+ $current = $paragraph;
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+ break;
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+ }
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+ if ($paragraph->level <= $curr->level) {
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+ //不能往下走了，就是它了
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+ $endParagraph = $paragraphs[$key - 1]->paragraph + $paragraphs[$key - 1]->chapter_len - 1;
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+ $current = $paragraph;
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+ break;
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+ }
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+ }
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+ }
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+ }
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+ $start = $curr->paragraph;
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+ $end = $endParagraph;
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+ $nextPali = $this->next($current->book, $current->paragraph, $current->level);
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+ $prevPali = $this->prev($current->book, $current->paragraph, $current->level);
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+
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+ $next = null;
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+ if ($nextPali) {
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+ $nextTranslation = ProgressChapter::with('channel.owner')
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+ ->where('book', $nextPali->book)
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+ ->where('para', $nextPali->paragraph)
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+ ->where('channel_id', $book->channel_id)
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+ ->first();
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+ if ($nextTranslation) {
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+ if (!empty($nextTranslation->title)) {
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+ $next['title'] = $nextTranslation->title;
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+ } else {
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+ $next['title'] = $nextPali->toc;
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+ }
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+ $next['id'] = $nextTranslation->uid;
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+ }
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+ }
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+
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+ $prev = null;
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+ if ($prevPali) {
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+ $prevTranslation = ProgressChapter::with('channel.owner')
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+ ->where('book', $prevPali->book)
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+ ->where('para', $prevPali->paragraph)
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+ ->where('channel_id', $book->channel_id)
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+ ->first();
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+ if ($prevTranslation) {
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+ if (!empty($prevTranslation->title)) {
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+ $prev['title'] = $prevTranslation->title;
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+ } else {
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+ $prev['title'] = $prevPali->toc;
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+ }
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+ $prev['id'] = $prevTranslation->uid;
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+ }
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+ }
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+
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+ return compact('start', 'end', 'next', 'prev');
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+ }
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+
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+ public function next($book, $paragraph, $level)
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+ {
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+ $next = PaliText::where('book', $book)
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+ ->where('paragraph', '>', $paragraph)
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+ ->where('level', $level)
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+ ->orderBy('paragraph')
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+ ->first();
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+ return $next ?? null;
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+ }
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+ public function prev($book, $paragraph, $level)
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+ {
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+ $prev = PaliText::where('book', $book)
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+ ->where('paragraph', '<', $paragraph)
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+ ->where('level', $level)
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+ ->orderBy('paragraph', 'desc')
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+ ->first();
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+
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+ return $prev ?? null;
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+ }
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public function show2($id)
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{
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// Sample book data (replace with database query)
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visuddhinanda