From d6e68b2916d30c527b1ce922af6e86f97814f286 Mon Sep 17 00:00:00 2001
From: Michael Andres <ma@suse.de>
Date: Thu, 17 Oct 2013 16:35:07 +0200
Subject: [PATCH] Add Package isCached and cachedLocation methods

---
 zypp/Package.cc | 39 +++++++++++++++++++++++++++++++++++++++
 zypp/Package.h  |  7 +++++++
 2 files changed, 46 insertions(+)

diff --git a/zypp/Package.cc b/zypp/Package.cc
index fd138af..ecac7c9 100644
--- a/zypp/Package.cc
+++ b/zypp/Package.cc
@@ -9,6 +9,8 @@
 /** \file	zypp/Package.cc
  *
 */
+#include <fstream>
+
 #include "zypp/base/Logger.h"
 #include "zypp/base/String.h"
 #include "zypp/Package.h"
@@ -148,6 +150,43 @@ namespace zypp
   OnMediaLocation Package::location() const
   { return lookupLocation(); }
 
+  namespace
+  {
+    bool schemeIsLocalDir( const Url & url_r )
+    {
+      std::string s( url_r.getScheme() );
+      return s == "dir" || s == "file";
+    }
+  }
+
+  Pathname Package::cachedLocation() const
+  {
+    OnMediaLocation loc( location() );
+    PathInfo pi( repoInfo().packagesPath() / loc.filename() );
+
+    if ( ! pi.isExist() )
+      return Pathname();	// no file in cache
+
+    if ( loc.checksum().empty() )
+    {
+      Url url( repoInfo().url() );
+      if ( ! schemeIsLocalDir( url ) )
+	return Pathname();	// same name but no checksum to verify
+
+      // for local repos compare with the checksum in repo
+      if ( CheckSum( CheckSum::md5Type(), std::ifstream( (url.getPathName() / loc.filename()).c_str() ) )
+	!= CheckSum( CheckSum::md5Type(), std::ifstream( pi.c_str() ) ) )
+	return Pathname();	// same name but wrong checksum
+    }
+    else
+    {
+      if ( loc.checksum() != CheckSum( loc.checksum().type(), std::ifstream( pi.c_str() ) ) )
+	return Pathname();	// same name but wrong checksum
+    }
+
+    return pi.path();		// the right one
+  }
+
   std::string Package::sourcePkgName() const
   {
     // no id means same as package
diff --git a/zypp/Package.h b/zypp/Package.h
index de515c7..2219b8d 100644
--- a/zypp/Package.h
+++ b/zypp/Package.h
@@ -122,6 +122,13 @@ namespace zypp
      */
     OnMediaLocation location() const;
 
+    /** Location of the downloaded package in cache or an empty path. */
+    Pathname cachedLocation() const;
+
+    /** Whether the package is cached. */
+    bool isCached() const
+    { return ! cachedLocation().empty(); }
+
   protected:
     friend Ptr make<Self>( const sat::Solvable & solvable_r );
     /** Ctor */
-- 
2.7.4