1 files changed, 225 insertions, 0 deletions

diff --git a/application/netscape/NetscapeBookmarkUtils.php b/application/netscape/NetscapeBookmarkUtils.php
new file mode 100644
index 00000000..2bf928c2
--- /dev/null
+++ b/application/netscape/NetscapeBookmarkUtils.php
@@ -0,0 +1,225 @@
+<?php
+
+namespace Shaarli\Netscape;
+
+use DateTime;
+use DateTimeZone;
+use Exception;
+use Psr\Log\LogLevel;
+use Shaarli\Bookmark\LinkDB;
+use Shaarli\Config\ConfigManager;
+use Shaarli\History;
+use Shaarli\NetscapeBookmarkParser\NetscapeBookmarkParser;
+use Katzgrau\KLogger\Logger;
+
+/**
+ * Utilities to import and export bookmarks using the Netscape format
+ * TODO: Not static, use a container.
+ */
+class NetscapeBookmarkUtils
+{
+
+    /**
+     * Filters links and adds Netscape-formatted fields
+     *
+     * Added fields:
+     * - timestamp  link addition date, using the Unix epoch format
+     * - taglist    comma-separated tag list
+     *
+     * @param LinkDB $linkDb         Link datastore
+     * @param string $selection      Which links to export: (all|private|public)
+     * @param bool   $prependNoteUrl Prepend note permalinks with the server's URL
+     * @param string $indexUrl       Absolute URL of the Shaarli index page
+     *
+     * @throws Exception Invalid export selection
+     *
+     * @return array The links to be exported, with additional fields
+     */
+    public static function filterAndFormat($linkDb, $selection, $prependNoteUrl, $indexUrl)
+    {
+        // see tpl/export.html for possible values
+        if (!in_array($selection, array('all', 'public', 'private'))) {
+            throw new Exception(t('Invalid export selection:') . ' "' . $selection . '"');
+        }
+
+        $bookmarkLinks = array();
+        foreach ($linkDb as $link) {
+            if ($link['private'] != 0 && $selection == 'public') {
+                continue;
+            }
+            if ($link['private'] == 0 && $selection == 'private') {
+                continue;
+            }
+            $date = $link['created'];
+            $link['timestamp'] = $date->getTimestamp();
+            $link['taglist'] = str_replace(' ', ',', $link['tags']);
+
+            if (startsWith($link['url'], '?') && $prependNoteUrl) {
+                $link['url'] = $indexUrl . $link['url'];
+            }
+
+            $bookmarkLinks[] = $link;
+        }
+
+        return $bookmarkLinks;
+    }
+
+    /**
+     * Generates an import status summary
+     *
+     * @param string $filename       name of the file to import
+     * @param int    $filesize       size of the file to import
+     * @param int    $importCount    how many links were imported
+     * @param int    $overwriteCount how many links were overwritten
+     * @param int    $skipCount      how many links were skipped
+     * @param int    $duration       how many seconds did the import take
+     *
+     * @return string Summary of the bookmark import status
+     */
+    private static function importStatus(
+        $filename,
+        $filesize,
+        $importCount = 0,
+        $overwriteCount = 0,
+        $skipCount = 0,
+        $duration = 0
+    ) {
+        $status = sprintf(t('File %s (%d bytes) '), $filename, $filesize);
+        if ($importCount == 0 && $overwriteCount == 0 && $skipCount == 0) {
+            $status .= t('has an unknown file format. Nothing was imported.');
+        } else {
+            $status .= vsprintf(
+                t(
+                    'was successfully processed in %d seconds: '
+                    . '%d links imported, %d links overwritten, %d links skipped.'
+                ),
+                [$duration, $importCount, $overwriteCount, $skipCount]
+            );
+        }
+        return $status;
+    }
+
+    /**
+     * Imports Web bookmarks from an uploaded Netscape bookmark dump
+     *
+     * @param array         $post    Server $_POST parameters
+     * @param array         $files   Server $_FILES parameters
+     * @param LinkDB        $linkDb  Loaded LinkDB instance
+     * @param ConfigManager $conf    instance
+     * @param History       $history History instance
+     *
+     * @return string Summary of the bookmark import status
+     */
+    public static function import($post, $files, $linkDb, $conf, $history)
+    {
+        $start = time();
+        $filename = $files['filetoupload']['name'];
+        $filesize = $files['filetoupload']['size'];
+        $data = file_get_contents($files['filetoupload']['tmp_name']);
+
+        if (preg_match('/<!DOCTYPE NETSCAPE-Bookmark-file-1>/i', $data) === 0) {
+            return self::importStatus($filename, $filesize);
+        }
+
+        // Overwrite existing links?
+        $overwrite = !empty($post['overwrite']);
+
+        // Add tags to all imported links?
+        if (empty($post['default_tags'])) {
+            $defaultTags = array();
+        } else {
+            $defaultTags = preg_split(
+                '/[\s,]+/',
+                escape($post['default_tags'])
+            );
+        }
+
+        // links are imported as public by default
+        $defaultPrivacy = 0;
+
+        $parser = new NetscapeBookmarkParser(
+            true,                           // nested tag support
+            $defaultTags,                   // additional user-specified tags
+            strval(1 - $defaultPrivacy),    // defaultPub = 1 - defaultPrivacy
+            $conf->get('resource.data_dir') // log path, will be overridden
+        );
+        $logger = new Logger(
+            $conf->get('resource.data_dir'),
+            !$conf->get('dev.debug') ? LogLevel::INFO : LogLevel::DEBUG,
+            [
+                'prefix' => 'import.',
+                'extension' => 'log',
+            ]
+        );
+        $parser->setLogger($logger);
+        $bookmarks = $parser->parseString($data);
+
+        $importCount = 0;
+        $overwriteCount = 0;
+        $skipCount = 0;
+
+        foreach ($bookmarks as $bkm) {
+            $private = $defaultPrivacy;
+            if (empty($post['privacy']) || $post['privacy'] == 'default') {
+                // use value from the imported file
+                $private = $bkm['pub'] == '1' ? 0 : 1;
+            } elseif ($post['privacy'] == 'private') {
+                // all imported links are private
+                $private = 1;
+            } elseif ($post['privacy'] == 'public') {
+                // all imported links are public
+                $private = 0;
+            }
+
+            $newLink = array(
+                'title' => $bkm['title'],
+                'url' => $bkm['uri'],
+                'description' => $bkm['note'],
+                'private' => $private,
+                'tags' => $bkm['tags']
+            );
+
+            $existingLink = $linkDb->getLinkFromUrl($bkm['uri']);
+
+            if ($existingLink !== false) {
+                if ($overwrite === false) {
+                    // Do not overwrite an existing link
+                    $skipCount++;
+                    continue;
+                }
+
+                // Overwrite an existing link, keep its date
+                $newLink['id'] = $existingLink['id'];
+                $newLink['created'] = $existingLink['created'];
+                $newLink['updated'] = new DateTime();
+                $newLink['shorturl'] = $existingLink['shorturl'];
+                $linkDb[$existingLink['id']] = $newLink;
+                $importCount++;
+                $overwriteCount++;
+                continue;
+            }
+
+            // Add a new link - @ used for UNIX timestamps
+            $newLinkDate = new DateTime('@' . strval($bkm['time']));
+            $newLinkDate->setTimezone(new DateTimeZone(date_default_timezone_get()));
+            $newLink['created'] = $newLinkDate;
+            $newLink['id'] = $linkDb->getNextId();
+            $newLink['shorturl'] = link_small_hash($newLink['created'], $newLink['id']);
+            $linkDb[$newLink['id']] = $newLink;
+            $importCount++;
+        }
+
+        $linkDb->save($conf->get('resource.page_cache'));
+        $history->importLinks();
+
+        $duration = time() - $start;
+        return self::importStatus(
+            $filename,
+            $filesize,
+            $importCount,
+            $overwriteCount,
+            $skipCount,
+            $duration
+        );
+    }
+}