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Prototype OPML exporter

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J. King 2019-03-28 21:53:04 -04:00
parent de615c671a
commit 25b7b47e0a
1 changed files with 59 additions and 0 deletions
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lib/ImportExport/OPML.php Normal file
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<?php
/** @license MIT
* Copyright 2017 J. King, Dustin Wilson et al.
* See LICENSE and AUTHORS files for details */
declare(strict_types=1);
namespace JKingWeb\Arsse\ImportExport;
use JKingWeb\Arsse\Arsse;
class OPML {
public function export(string $user, bool $flat = false): string {
$folders = [];
$parents = [0 => null];
$tags = [];
$document = new \DOMDocument("1.0", "utf-8");
$document->formatOutput = true;
$document->appendChild($document->createElement("opml"));
$document->documentElement->setAttribute("version", "2.0");
$document->documentElement->appendChild($document->createElement("head"));
// create the "root folder" node (the body node, in OPML terms)
$folders[0] = $document->createElement("body");
$transaction = Arsse::$db->begin();
foreach (Arsse::$db->tagSummarize($user) as $r) {
$sub = $r['subscription'];
$tag = $r['name'];
$tag = str_replace(",", "", $tag);
if (!isset($tags[$sub])) {
$tags[$sub] = [];
}
$tags[$sub][] = $tag;
}
if (!$flat) {
foreach (Arsse::$db->folderList($user) as $r) {
$parents[$r['id']] = $r['parent'] ?? 0;
$el = $document->createElement("outline");
$el->setAttribute("text", $r['name']);
$folders[$r['id']] = $el;
}
}
foreach (Arsse::$db->subscriptionList($user) as $r) {
$el = $document->createElement(("outline"));
$el->setAttribute("text", $r['title']);
$el->setAttribute("type", "rss");
$el->setAttribute("xmlUrl", $r['url']);
if (sizeof($tags[$r['id']])) {
$el->setAttribute("category", implode(",", $tags[$r['id']]));
}
($folders[$r['folder'] ?? 0] ?? $folders[0])->appendChild($el);
}
$transaction->rollback();
foreach ($folders as $id => $el) {
$parent = $parents[$id] ?? $document->documentElement;
$parent->appendChild($el);
}
// return the serialization
return $document->saveXML();
}
}