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Discover the previous and next pages of all pages

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This commit is contained in:
Daniel Rudolf 2016-12-12 14:49:57 +01:00
parent 9b72b5c316
commit 2e880d6c7f
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GPG Key ID: A061F02CD8DE4538
1 changed files with 46 additions and 25 deletions
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lib/Pico.php
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@ -391,6 +391,7 @@ class Pico
$this->readPages(); $this->readPages();
$this->sortPages(); $this->sortPages();
$this->discoverPageSiblings();
$this->discoverCurrentPage(); $this->discoverCurrentPage();
$this->triggerEvent('onPagesLoaded', array( $this->triggerEvent('onPagesLoaded', array(
@ -1237,8 +1238,11 @@ class Pico
* | date_formatted | string | formatted date of the page | * | date_formatted | string | formatted date of the page |
* | raw_content | string | raw, not yet parsed contents of the page | * | raw_content | string | raw, not yet parsed contents of the page |
* | meta | string | parsed meta data of the page | * | meta | string | parsed meta data of the page |
* | previous_page | &array | reference to the previous page |
* | next_page | &array | reference to the next page |
* *
* @see Pico::sortPages() * @see Pico::sortPages()
* @see Pico::discoverPageSiblings()
* @see Pico::getPages() * @see Pico::getPages()
* @return void * @return void
*/ */
@ -1372,11 +1376,47 @@ class Pico
} }
} }
/**
* Walks through the list of all known pages and discovers the previous and
* next page respectively
*
* @see Pico::readPages()
* @see Pico::getPages()
* @return void
*/
protected function discoverPageSiblings()
{
if (($this->getConfig('order_by') === 'date') && ($this->getConfig('order') === 'desc')) {
$precedingPageKey = 'next_page';
$succeedingPageKey = 'previous_page';
} else {
$precedingPageKey = 'previous_page';
$succeedingPageKey = 'next_page';
}
$precedingPageId = null;
foreach ($this->pages as $id => &$pageData) {
$pageData[$precedingPageKey] = null;
$pageData[$succeedingPageKey] = null;
if ($pageData['hidden']) {
continue;
}
if ($precedingPageId !== null) {
$precedingPageData = &$this->pages[$precedingPageId];
$pageData[$precedingPageKey] = &$precedingPageData;
$precedingPageData[$succeedingPageKey] = &$pageData;
}
$precedingPageId = $id;
}
}
/** /**
* Returns the list of known pages * Returns the list of known pages
* *
* @see Pico::readPages() * @see Pico::readPages()
* @see Pico::sortPages()
* @return array[]|null the data of all pages * @return array[]|null the data of all pages
*/ */
public function getPages() public function getPages()
@ -1385,8 +1425,8 @@ class Pico
} }
/** /**
* Walks through the list of known pages and discovers the requested page * Discovers the page data of the requested page as well as the previous
* as well as the previous and next page relative to it * and next page relative to it
* *
* @see Pico::getCurrentPage() * @see Pico::getCurrentPage()
* @see Pico::getPreviousPage() * @see Pico::getPreviousPage()
@ -1395,8 +1435,6 @@ class Pico
*/ */
protected function discoverCurrentPage() protected function discoverCurrentPage()
{ {
$pageIds = array_keys($this->pages);
$contentDir = $this->getConfig('content_dir'); $contentDir = $this->getConfig('content_dir');
$contentDirLength = strlen($contentDir); $contentDirLength = strlen($contentDir);
@ -1407,27 +1445,10 @@ class Pico
} }
$currentPageId = substr($this->requestFile, $contentDirLength, -strlen($this->getConfig('content_ext'))); $currentPageId = substr($this->requestFile, $contentDirLength, -strlen($this->getConfig('content_ext')));
$currentPageIndex = array_search($currentPageId, $pageIds); if (isset($this->pages[$currentPageId])) {
if ($currentPageIndex !== false) {
$this->currentPage = &$this->pages[$currentPageId]; $this->currentPage = &$this->pages[$currentPageId];
$this->previousPage = &$this->pages[$currentPageId]['previous_page'];
if (($this->getConfig('order_by') === 'date') && ($this->getConfig('order') === 'desc')) { $this->nextPage = &$this->pages[$currentPageId]['next_page'];
$previousPageOffset = 1;
$nextPageOffset = -1;
} else {
$previousPageOffset = -1;
$nextPageOffset = 1;
}
if (isset($pageIds[$currentPageIndex + $previousPageOffset])) {
$previousPageId = $pageIds[$currentPageIndex + $previousPageOffset];
$this->previousPage = &$this->pages[$previousPageId];
}
if (isset($pageIds[$currentPageIndex + $nextPageOffset])) {
$nextPageId = $pageIds[$currentPageIndex + $nextPageOffset];
$this->nextPage = &$this->pages[$nextPageId];
}
} }
} }