Add date column to the built-in search engine

Adds a date column to the built-in search engine to show when a torrent was published/uploaded on the engine site.
When a plugin wants to show a date, it can now add a `pub_date` entry to its result dict. The value format is a unix timestamp (an integer representing seconds since epoch).
Plugins with no date support will keep working.

PR #20703.

src/base/search/searchhandler.cpp

@@ -55,6 +55,7 @@ namespace
         PL_LEECHS,
         PL_ENGINE_URL,
         PL_DESC_LINK,
+        PL_PUB_DATE,
         NB_PLUGIN_COLUMNS
     };
 }
@@ -176,7 +177,7 @@ bool SearchHandler::parseSearchResult(const QStringView line, SearchResult &sear
     const QList<QStringView> parts = line.split(u'|');
     const int nbFields = parts.size();
 
-    if (nbFields < (NB_PLUGIN_COLUMNS - 1)) return false; // -1 because desc_link is optional
+    if (nbFields <= PL_ENGINE_URL) return false; // Anything after ENGINE_URL is optional
 
     searchResult = SearchResult();
     searchResult.fileUrl = parts.at(PL_DL_LINK).trimmed().toString(); // download URL
@@ -194,9 +195,17 @@ bool SearchHandler::parseSearchResult(const QStringView line, SearchResult &sear
         searchResult.nbLeechers = -1;
 
     searchResult.siteUrl = parts.at(PL_ENGINE_URL).trimmed().toString(); // Search site URL
-    if (nbFields == NB_PLUGIN_COLUMNS)
+
+    if (nbFields > PL_DESC_LINK)
         searchResult.descrLink = parts.at(PL_DESC_LINK).trimmed().toString(); // Description Link
 
+    if (nbFields > PL_PUB_DATE)
+    {
+        const qint64 secs = parts.at(PL_PUB_DATE).trimmed().toLongLong(&ok);
+        if (ok && (secs > 0))
+            searchResult.pubDate = QDateTime::fromSecsSinceEpoch(secs); // Date
+    }
+
     return true;
 }
 

src/base/search/searchhandler.h

@@ -30,6 +30,7 @@
 #pragma once
 
 #include <QByteArray>
+#include <QDateTime>
 #include <QList>
 #include <QObject>
 #include <QString>
@@ -47,6 +48,7 @@ struct SearchResult
     qlonglong nbLeechers = 0;
     QString siteUrl;
     QString descrLink;
+    QDateTime pubDate;
 };
 
 class SearchPluginManager;