pcm.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2021 Andrew Lutsenko, anlutsenko at gmail dot com
 * Copyright (C) 1992-2022, 2024 KiCad Developers, see AUTHORS.txt for contributors.
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
// kicad_curl.h *must be* included before any wxWidgets header to avoid conflicts
// at least on Windows/msys2
#include "kicad_curl/kicad_curl_easy.h"
#include <kicad_curl/kicad_curl.h>
 
#include "core/wx_stl_compat.h"
#include <env_vars.h>
#include <background_jobs_monitor.h>
#include "build_version.h"
#include "paths.h"
#include "pcm.h"
#include "pgm_base.h"
#include "picosha2.h"
#include "settings/settings_manager.h"
#include <wx_filename.h>
 
#include <fstream>
#include <iomanip>
#include <memory>
#include <wx/dir.h>
#include <wx/filefn.h>
#include <wx/image.h>
#include <wx/mstream.h>
#include <wx/tokenzr.h>
#include <wx/wfstream.h>
#include <wx/zipstrm.h>
 
 
static const wxChar tracePcm[] = wxT( "KICAD_PCM" );
 
 
const std::tuple<int, int, int> PLUGIN_CONTENT_MANAGER::m_kicad_version =
 GetMajorMinorPatchTuple();
 
 
class THROWING_ERROR_HANDLER : public nlohmann::json_schema::error_handler
{
 void error( const json::json_pointer& ptr, const json& instance,
 const std::string& message ) override
 {
 throw std::invalid_argument( std::string( "At " ) + ptr.to_string() + ", value:\n"
 + instance.dump() + "\n" + message + "\n" );
 }
};
 
 
PLUGIN_CONTENT_MANAGER::PLUGIN_CONTENT_MANAGER(
 std::function<void( int )> aAvailableUpdateCallback ) :
 m_dialog( nullptr ),
 m_availableUpdateCallback( aAvailableUpdateCallback )
{
 ReadEnvVar();
 
 // Read and store pcm schema
 wxFileName schema_file( PATHS::GetStockDataPath( true ), wxS( "pcm.v1.schema.json" ) );
 schema_file.Normalize( FN_NORMALIZE_FLAGS | wxPATH_NORM_ENV_VARS );
 schema_file.AppendDir( wxS( "schemas" ) );
 
 std::ifstream schema_stream( schema_file.GetFullPath().fn_str() );
 nlohmann::json schema;
 
 try
 {
 schema_stream >> schema;
 m_schema_validator.set_root_schema( schema );
 }
 catch( std::exception& e )
 {
 if( !schema_file.FileExists() )
 {
 wxLogError( wxString::Format( _( "schema file '%s' not found" ),
 schema_file.GetFullPath() ) );
 }
 else
 {
 wxLogError( wxString::Format( _( "Error loading schema: %s" ), e.what() ) );
 }
 }
 
 // Load currently installed packages
 wxFileName f( PATHS::GetUserSettingsPath(), wxT( "installed_packages.json" ) );
 
 if( f.FileExists() )
 {
 std::ifstream installed_stream( f.GetFullPath().fn_str() );
 nlohmann::json installed;
 
 try
 {
 installed_stream >> installed;
 
 if( installed.contains( "packages" ) && installed["packages"].is_array() )
 {
 for( const auto& js_entry : installed["packages"] )
 {
 PCM_INSTALLATION_ENTRY entry = js_entry.get<PCM_INSTALLATION_ENTRY>();
 m_installed.emplace( entry.package.identifier, entry );
 }
 }
 }
 catch( std::exception& e )
 {
 wxLogError( wxString::Format( _( "Error loading installed packages list: %s" ),
 e.what() ) );
 }
 }
 
 // As a fall back populate installed from names of directories
 
 for( const wxString& dir : PCM_PACKAGE_DIRECTORIES )
 {
 wxFileName d( m_3rdparty_path, wxEmptyString );
 d.AppendDir( dir );
 
 if( d.DirExists() )
 {
 wxDir package_dir( d.GetPath() );
 
 if( !package_dir.IsOpened() )
 continue;
 
 wxString subdir;
 bool more = package_dir.GetFirst( &subdir, "", wxDIR_DIRS | wxDIR_HIDDEN );
 
 while( more )
 {
 wxString actual_package_id = subdir;
 actual_package_id.Replace( '_', '.' );
 
 if( m_installed.find( actual_package_id ) == m_installed.end() )
 {
 PCM_INSTALLATION_ENTRY entry;
 wxFileName subdir_file( d.GetPath(), subdir );
 
 // wxFileModificationTime bugs out on windows for directories
 wxStructStat stat;
 int stat_code = wxStat( subdir_file.GetFullPath(), &stat );
 
 entry.package.name = subdir;
 entry.package.identifier = actual_package_id;
 entry.current_version = "0.0";
 entry.repository_name = wxT( "<unknown>" );
 
 if( stat_code == 0 )
 entry.install_timestamp = stat.st_mtime;
 
 PACKAGE_VERSION version;
 version.version = "0.0";
 version.status = PVS_STABLE;
 version.kicad_version = GetMajorMinorVersion();
 
 entry.package.versions.emplace_back( version );
 
 m_installed.emplace( actual_package_id, entry );
 }
 
 more = package_dir.GetNext( &subdir );
 }
 }
 }
 
 // Calculate package compatibility
 std::for_each( m_installed.begin(), m_installed.end(),
 [&]( std::pair<const wxString, PCM_INSTALLATION_ENTRY>& entry )
 {
 PreparePackage( entry.second.package );
 } );
}
 
 
void PLUGIN_CONTENT_MANAGER::ReadEnvVar()
{
 // Get 3rd party path
 const ENV_VAR_MAP& env = Pgm().GetLocalEnvVariables();
 
 if( std::optional<wxString> v = ENV_VAR::GetVersionedEnvVarValue( env, wxT( "3RD_PARTY" ) ) )
 m_3rdparty_path = *v;
 else
 m_3rdparty_path = PATHS::GetDefault3rdPartyPath();
}
 
 
bool PLUGIN_CONTENT_MANAGER::DownloadToStream( const wxString& aUrl, std::ostream* aOutput,
 PROGRESS_REPORTER* aReporter,
 const size_t aSizeLimit )
{
 bool size_exceeded = false;
 
 TRANSFER_CALLBACK callback = [&]( size_t dltotal, size_t dlnow, size_t ultotal, size_t ulnow )
 {
 if( aSizeLimit > 0 && ( dltotal > aSizeLimit || dlnow > aSizeLimit ) )
 {
 size_exceeded = true;
 
 // Non zero return means abort.
 return true;
 }
 
 if( dltotal > 1000 )
 {
 aReporter->SetCurrentProgress( dlnow / (double) dltotal );
 aReporter->Report( wxString::Format( _( "Downloading %lld/%lld kB" ), dlnow / 1000,
 dltotal / 1000 ) );
 }
 else
 {
 aReporter->SetCurrentProgress( 0.0 );
 }
 
 return !aReporter->KeepRefreshing();
 };
 
 KICAD_CURL_EASY curl;
 curl.SetOutputStream( aOutput );
 curl.SetURL( aUrl.ToUTF8().data() );
 curl.SetFollowRedirects( true );
 curl.SetTransferCallback( callback, 250000L );
 
 int code = curl.Perform();
 
 if( !aReporter->IsCancelled() )
 aReporter->SetCurrentProgress( 1.0 );
 
 if( code != CURLE_OK )
 {
 if( m_dialog )
 {
 if( code == CURLE_ABORTED_BY_CALLBACK && size_exceeded )
 wxMessageBox( _( "Download is too large." ) );
 else if( code != CURLE_ABORTED_BY_CALLBACK )
 wxLogError( wxString( curl.GetErrorText( code ) ) );
 }
 
 return false;
 }
 
 return true;
}
 
 
bool PLUGIN_CONTENT_MANAGER::FetchRepository( const wxString& aUrl, PCM_REPOSITORY& aRepository,
 PROGRESS_REPORTER* aReporter )
{
 std::stringstream repository_stream;
 
 aReporter->SetTitle( _( "Fetching repository" ) );
 
 if( !DownloadToStream( aUrl, &repository_stream, aReporter, 20480 ) )
 {
 if( m_dialog )
 wxLogError( _( "Unable to load repository url" ) );
 
 return false;
 }
 
 nlohmann::json repository_json;
 
 try
 {
 repository_stream >> repository_json;
 
 ValidateJson( repository_json, nlohmann::json_uri( "#/definitions/Repository" ) );
 
 aRepository = repository_json.get<PCM_REPOSITORY>();
 }
 catch( const std::exception& e )
 {
 if( m_dialog )
 {
 wxLogError( wxString::Format( _( "Unable to parse repository: %s" ), e.what() ) );
 wxLogError( _( "The given repository URL does not look like a valid KiCad package "
 "repository. Please double check the URL." ) );
 }
 
 return false;
 }
 
 return true;
}
 
 
void PLUGIN_CONTENT_MANAGER::ValidateJson( const nlohmann::json& aJson,
 const nlohmann::json_uri& aUri ) const
{
 THROWING_ERROR_HANDLER error_handler;
 m_schema_validator.validate( aJson, error_handler, aUri );
}
 
 
bool PLUGIN_CONTENT_MANAGER::fetchPackages( const wxString& aUrl,
 const std::optional<wxString>& aHash,
 std::vector<PCM_PACKAGE>& aPackages,
 PROGRESS_REPORTER* aReporter )
{
 std::stringstream packages_stream;
 
 aReporter->SetTitle( _( "Fetching repository packages" ) );
 
 if( !DownloadToStream( aUrl, &packages_stream, aReporter ) )
 {
 if( m_dialog )
 wxLogError( _( "Unable to load repository packages url." ) );
 
 return false;
 }
 
 std::istringstream isstream( packages_stream.str() );
 
 if( aHash && !VerifyHash( isstream, *aHash ) )
 {
 if( m_dialog )
 wxLogError( _( "Packages hash doesn't match. Repository may be corrupted." ) );
 
 return false;
 }
 
 try
 {
 nlohmann::json packages_json = nlohmann::json::parse( packages_stream.str() );
 ValidateJson( packages_json, nlohmann::json_uri( "#/definitions/PackageArray" ) );
 
 aPackages = packages_json["packages"].get<std::vector<PCM_PACKAGE>>();
 }
 catch( std::exception& e )
 {
 if( m_dialog )
 {
 wxLogError( wxString::Format( _( "Unable to parse packages metadata:\n\n%s" ),
 e.what() ) );
 }
 
 return false;
 }
 
 return true;
}
 
 
bool PLUGIN_CONTENT_MANAGER::VerifyHash( std::istream& aStream, const wxString& aHash ) const
{
 std::vector<unsigned char> bytes( picosha2::k_digest_size );
 
 picosha2::hash256( std::istreambuf_iterator<char>( aStream ), std::istreambuf_iterator<char>(),
 bytes.begin(), bytes.end() );
 std::string hex_str = picosha2::bytes_to_hex_string( bytes.begin(), bytes.end() );
 
 return aHash.compare( hex_str ) == 0;
}
 
 
const PCM_REPOSITORY&
PLUGIN_CONTENT_MANAGER::getCachedRepository( const wxString& aRepositoryId ) const
{
 wxASSERT_MSG( m_repository_cache.find( aRepositoryId ) != m_repository_cache.end(),
 wxT( "Repository is not cached." ) );
 
 return m_repository_cache.at( aRepositoryId );
}
 
 
bool PLUGIN_CONTENT_MANAGER::CacheRepository( const wxString& aRepositoryId )
{
 if( m_repository_cache.find( aRepositoryId ) != m_repository_cache.end() )
 return true;
 
 const auto repository_tuple =
 std::find_if( m_repository_list.begin(), m_repository_list.end(),
 [&aRepositoryId]( const std::tuple<wxString, wxString, wxString>& t )
 {
 return std::get<0>( t ) == aRepositoryId;
 } );
 
 if( repository_tuple == m_repository_list.end() )
 return false;
 
 wxString url = std::get<2>( *repository_tuple );
 
 nlohmann::json js;
 PCM_REPOSITORY current_repo;
 PCM_REPOSITORY& current_repo_ref = current_repo;
 
 std::shared_ptr<PROGRESS_REPORTER> reporter;
 
 if( m_dialog )
 reporter = std::make_shared<WX_PROGRESS_REPORTER>( m_dialog, wxEmptyString, 1 );
 else
 reporter = m_updateBackgroundJob->m_reporter;
 
 if( !FetchRepository( url, current_repo, reporter.get() ) )
 return false;
 
 bool packages_cache_exists = false;
 
 // First load repository data from local filesystem if available.
 wxFileName repo_cache = wxFileName( PATHS::GetUserCachePath(), wxT( "repository.json" ) );
 repo_cache.AppendDir( wxT( "pcm" ) );
 repo_cache.AppendDir( aRepositoryId );
 wxFileName packages_cache( repo_cache.GetPath(), wxT( "packages.json" ) );
 
 if( repo_cache.FileExists() && packages_cache.FileExists() )
 {
 std::ifstream repo_stream( repo_cache.GetFullPath().fn_str() );
 PCM_REPOSITORY saved_repo;
 try
 {
 repo_stream >> js;
 saved_repo = js.get<PCM_REPOSITORY>();
 }
 catch( ... )
 {
 if( m_dialog )
 wxLogError( _( "Failed to parse locally stored repository.json." ) );
 }
 
 if( saved_repo.packages.update_timestamp == current_repo.packages.update_timestamp )
 {
 // Cached repo is up to date, use data on disk
 js.clear();
 std::ifstream packages_cache_stream( packages_cache.GetFullPath().fn_str() );
 
 try
 {
 packages_cache_stream >> js;
 saved_repo.package_list = js["packages"].get<std::vector<PCM_PACKAGE>>();
 
 for( size_t i = 0; i < saved_repo.package_list.size(); i++ )
 {
 PreparePackage( saved_repo.package_list[i] );
 saved_repo.package_map[saved_repo.package_list[i].identifier] = i;
 }
 
 m_repository_cache[aRepositoryId] = std::move( saved_repo );
 
 packages_cache_exists = true;
 }
 catch( ... )
 {
 if( m_dialog )
 {
 wxLogError( _( "Packages cache for current repository is corrupted, it will "
 "be redownloaded." ) );
 }
 }
 }
 }
 
 if( !packages_cache_exists )
 {
 // Cache doesn't exist or is out of date
 if( !fetchPackages( current_repo.packages.url, current_repo.packages.sha256,
 current_repo.package_list, reporter.get() ) )
 {
 return false;
 }
 
 for( size_t i = 0; i < current_repo.package_list.size(); i++ )
 {
 PreparePackage( current_repo.package_list[i] );
 current_repo.package_map[current_repo.package_list[i].identifier] = i;
 }
 
 repo_cache.Mkdir( wxS_DIR_DEFAULT, wxPATH_MKDIR_FULL );
 
 std::ofstream repo_cache_stream( repo_cache.GetFullPath().fn_str() );
 repo_cache_stream << std::setw( 4 ) << nlohmann::json( current_repo ) << std::endl;
 
 std::ofstream packages_cache_stream( packages_cache.GetFullPath().fn_str() );
 js.clear();
 js["packages"] = nlohmann::json( current_repo.package_list );
 packages_cache_stream << std::setw( 4 ) << js << std::endl;
 
 m_repository_cache[aRepositoryId] = std::move( current_repo );
 current_repo_ref = m_repository_cache[aRepositoryId];
 }
 
 if( current_repo_ref.resources )
 {
 // Check resources file date, redownload if needed
 PCM_RESOURCE_REFERENCE& resources = *current_repo_ref.resources;
 
 wxFileName resource_file( repo_cache.GetPath(), wxT( "resources.zip" ) );
 
 time_t mtime = 0;
 
 if( resource_file.FileExists() )
 mtime = wxFileModificationTime( resource_file.GetFullPath() );
 
 if( mtime + 600 < getCurrentTimestamp() && mtime < (time_t) resources.update_timestamp )
 {
 std::ofstream resources_stream( resource_file.GetFullPath().fn_str(),
 std::ios_base::binary );
 
 reporter->SetTitle( _( "Downloading resources" ) );
 
 // 100 Mb resource file limit
 bool success = DownloadToStream( resources.url, &resources_stream, reporter.get(),
 100 * 1024 * 1024 );
 
 resources_stream.close();
 
 if( success )
 {
 std::ifstream read_stream( resource_file.GetFullPath().fn_str(),
 std::ios_base::binary );
 
 
 if( resources.sha256 && !VerifyHash( read_stream, *resources.sha256 ) )
 {
 read_stream.close();
 
 if( m_dialog )
 {
 wxLogError( _( "Resources file hash doesn't match and will not be used. "
 "Repository may be corrupted." ) );
 }
 
 wxRemoveFile( resource_file.GetFullPath() );
 }
 }
 else
 {
 // Not critical, just clean up the file
 wxRemoveFile( resource_file.GetFullPath() );
 }
 }
 }
 
 updateInstalledPackagesMetadata( aRepositoryId );
 
 return true;
}
 
 
void PLUGIN_CONTENT_MANAGER::updateInstalledPackagesMetadata( const wxString& aRepositoryId )
{
 const PCM_REPOSITORY* repository;
 
 try
 {
 repository = &getCachedRepository( aRepositoryId );
 }
 catch( ... )
 {
 wxLogTrace( tracePcm, wxS( "Invalid/Missing repository " ) + aRepositoryId );
 return;
 }
 
 for( std::pair<const wxString, PCM_INSTALLATION_ENTRY>& pair : m_installed )
 {
 PCM_INSTALLATION_ENTRY& entry = pair.second;
 
 // If current package is not from this repository, skip it
 if( entry.repository_id != aRepositoryId )
 continue;
 
 // If current package is no longer in this repository, keep it as is
 if( repository->package_map.count( entry.package.identifier ) == 0 )
 continue;
 
 std::optional<PACKAGE_VERSION> current_version;
 
 auto current_version_it =
 std::find_if( entry.package.versions.begin(), entry.package.versions.end(),
 [&]( const PACKAGE_VERSION& version )
 {
 return version.version == entry.current_version;
 } );
 
 if( current_version_it != entry.package.versions.end() )
 current_version = *current_version_it; // copy
 
 // Copy repository metadata into installation entry
 entry.package = repository->package_list[repository->package_map.at( entry.package.identifier )];
 
 // Insert current version if it's missing from repository metadata
 current_version_it =
 std::find_if( entry.package.versions.begin(), entry.package.versions.end(),
 [&]( const PACKAGE_VERSION& version )
 {
 return version.version == entry.current_version;
 } );
 
 if( current_version_it == entry.package.versions.end() )
 {
 entry.package.versions.emplace_back( *current_version );
 
 // Re-sort the versions by descending version
 std::sort( entry.package.versions.begin(), entry.package.versions.end(),
 []( const PACKAGE_VERSION& a, const PACKAGE_VERSION& b )
 {
 return a.parsed_version > b.parsed_version;
 } );
 }
 }
}
 
 
void PLUGIN_CONTENT_MANAGER::PreparePackage( PCM_PACKAGE& aPackage )
{
 // Parse package version strings
 for( PACKAGE_VERSION& ver : aPackage.versions )
 {
 int epoch = 0, major = 0, minor = 0, patch = 0;
 
 if( ver.version_epoch )
 epoch = *ver.version_epoch;
 
 wxStringTokenizer version_tokenizer( ver.version, wxT( "." ) );
 
 major = wxAtoi( version_tokenizer.GetNextToken() );
 
 if( version_tokenizer.HasMoreTokens() )
 minor = wxAtoi( version_tokenizer.GetNextToken() );
 
 if( version_tokenizer.HasMoreTokens() )
 patch = wxAtoi( version_tokenizer.GetNextToken() );
 
 ver.parsed_version = std::make_tuple( epoch, major, minor, patch );
 
 // Determine compatibility
 ver.compatible = true;
 
 auto parse_version_tuple =
 []( const wxString& version, int deflt )
 {
 int ver_major = deflt;
 int ver_minor = deflt;
 int ver_patch = deflt;
 
 wxStringTokenizer tokenizer( version, wxT( "." ) );
 
 ver_major = wxAtoi( tokenizer.GetNextToken() );
 
 if( tokenizer.HasMoreTokens() )
 ver_minor = wxAtoi( tokenizer.GetNextToken() );
 
 if( tokenizer.HasMoreTokens() )
 ver_patch = wxAtoi( tokenizer.GetNextToken() );
 
 return std::tuple<int, int, int>( ver_major, ver_minor, ver_patch );
 };
 
 if( parse_version_tuple( ver.kicad_version, 0 ) > m_kicad_version )
 ver.compatible = false;
 
 if( ver.kicad_version_max
 && parse_version_tuple( *ver.kicad_version_max, 999 ) < m_kicad_version )
 ver.compatible = false;
 
#if defined( _WIN32 )
 wxString platform = wxT( "windows" );
#elif defined( __APPLE__ )
 wxString platform = wxT( "macos" );
#else
 wxString platform = wxT( "linux" );
#endif
 
 if( ver.platforms.size() > 0
 && std::find( ver.platforms.begin(), ver.platforms.end(), platform )
 == ver.platforms.end() )
 {
 ver.compatible = false;
 }
 }
 
 // Sort by descending version
 std::sort( aPackage.versions.begin(), aPackage.versions.end(),
 []( const PACKAGE_VERSION& a, const PACKAGE_VERSION& b )
 {
 return a.parsed_version > b.parsed_version;
 } );
}
 
 
const std::vector<PCM_PACKAGE>&
PLUGIN_CONTENT_MANAGER::GetRepositoryPackages( const wxString& aRepositoryId ) const
{
 static std::vector<PCM_PACKAGE> empty{};
 
 try
 {
 return getCachedRepository( aRepositoryId ).package_list;
 }
 catch( ... )
 {
 return empty;
 }
}
 
 
void PLUGIN_CONTENT_MANAGER::SetRepositoryList( const STRING_PAIR_LIST& aRepositories )
{
 // Clean up cache folder if repository is not in new list
 for( const std::tuple<wxString, wxString, wxString>& entry : m_repository_list )
 {
 auto it = std::find_if( aRepositories.begin(), aRepositories.end(),
 [&]( const auto& new_entry )
 {
 return new_entry.first == std::get<1>( entry );
 } );
 
 if( it == aRepositories.end() )
 {
 DiscardRepositoryCache( std::get<0>( entry ) );
 }
 }
 
 m_repository_list.clear();
 m_repository_cache.clear();
 
 for( const std::pair<wxString, wxString>& repo : aRepositories )
 {
 std::string url_sha = picosha2::hash256_hex_string( repo.second );
 m_repository_list.push_back( std::make_tuple( url_sha.substr( 0, 16 ), repo.first,
 repo.second ) );
 }
}
 
 
void PLUGIN_CONTENT_MANAGER::DiscardRepositoryCache( const wxString& aRepositoryId )
{
 if( m_repository_cache.count( aRepositoryId ) > 0 )
 m_repository_cache.erase( aRepositoryId );
 
 wxFileName repo_cache = wxFileName( PATHS::GetUserCachePath(), "" );
 repo_cache.AppendDir( wxT( "pcm" ) );
 repo_cache.AppendDir( aRepositoryId );
 
 if( repo_cache.DirExists() )
 repo_cache.Rmdir( wxPATH_RMDIR_RECURSIVE );
}
 
 
void PLUGIN_CONTENT_MANAGER::MarkInstalled( const PCM_PACKAGE& aPackage, const wxString& aVersion,
 const wxString& aRepositoryId )
{
 // In case of package update remove old data but keep pinned state
 bool pinned = false;
 
 if( m_installed.count( aPackage.identifier ) )
 {
 pinned = m_installed.at( aPackage.identifier ).pinned;
 MarkUninstalled( aPackage );
 }
 
 PCM_INSTALLATION_ENTRY entry;
 entry.package = aPackage;
 entry.current_version = aVersion;
 entry.repository_id = aRepositoryId;
 
 try
 {
 if( !aRepositoryId.IsEmpty() )
 entry.repository_name = getCachedRepository( aRepositoryId ).name;
 else
 entry.repository_name = _( "Local file" );
 }
 catch( ... )
 {
 entry.repository_name = _( "Unknown" );
 }
 
 entry.install_timestamp = getCurrentTimestamp();
 entry.pinned = pinned;
 
 m_installed.emplace( aPackage.identifier, entry );
}
 
 
void PLUGIN_CONTENT_MANAGER::MarkUninstalled( const PCM_PACKAGE& aPackage )
{
 m_installed.erase( aPackage.identifier );
}
 
 
PCM_PACKAGE_STATE PLUGIN_CONTENT_MANAGER::GetPackageState( const wxString& aRepositoryId,
 const wxString& aPackageId )
{
 bool installed = m_installed.find( aPackageId ) != m_installed.end();
 
 if( aRepositoryId.IsEmpty() || !CacheRepository( aRepositoryId ) )
 return installed ? PPS_INSTALLED : PPS_UNAVAILABLE;
 
 const PCM_REPOSITORY* repo;
 
 try
 {
 repo = &getCachedRepository( aRepositoryId );
 }
 catch( ... )
 {
 return installed ? PPS_INSTALLED : PPS_UNAVAILABLE;
 }
 
 if( repo->package_map.count( aPackageId ) == 0 )
 return installed ? PPS_INSTALLED : PPS_UNAVAILABLE;
 
 const PCM_PACKAGE& pkg = repo->package_list[repo->package_map.at( aPackageId )];
 
 if( installed )
 {
 // Package is installed, check for available updates at the same or
 // higher (numerically lower) version stability level
 wxString update_version = GetPackageUpdateVersion( pkg );
 
 return update_version.IsEmpty() ? PPS_INSTALLED : PPS_UPDATE_AVAILABLE;
 }
 else
 {
 // Find any compatible version
 auto ver_it = std::find_if( pkg.versions.begin(), pkg.versions.end(),
 []( const PACKAGE_VERSION& ver )
 {
 return ver.compatible;
 } );
 
 return ver_it == pkg.versions.end() ? PPS_UNAVAILABLE : PPS_AVAILABLE;
 }
}
 
 
const wxString PLUGIN_CONTENT_MANAGER::GetPackageUpdateVersion( const PCM_PACKAGE& aPackage )
{
 wxASSERT_MSG( m_installed.find( aPackage.identifier ) != m_installed.end(),
 wxT( "GetPackageUpdateVersion called on a not installed package" ) );
 
 const PCM_INSTALLATION_ENTRY& entry = m_installed.at( aPackage.identifier );
 
 auto installed_ver_it = std::find_if(
 entry.package.versions.begin(), entry.package.versions.end(),
 [&]( const PACKAGE_VERSION& ver )
 {
 return ver.version == entry.current_version;
 } );
 
 wxASSERT_MSG( installed_ver_it != entry.package.versions.end(),
 wxT( "Installed package version not found" ) );
 
 auto ver_it = std::find_if( aPackage.versions.begin(), aPackage.versions.end(),
 [&]( const PACKAGE_VERSION& ver )
 {
 return ver.compatible
 && installed_ver_it->status >= ver.status
 && installed_ver_it->parsed_version < ver.parsed_version;
 } );
 
 return ver_it == aPackage.versions.end() ? wxString( wxT( "" ) ) : ver_it->version;
}
 
time_t PLUGIN_CONTENT_MANAGER::getCurrentTimestamp() const
{
 return std::chrono::duration_cast<std::chrono::seconds>(
 std::chrono::system_clock::now().time_since_epoch() ).count();
}
 
 
void PLUGIN_CONTENT_MANAGER::SaveInstalledPackages()
{
 try
 {
 nlohmann::json js;
 js["packages"] = nlohmann::json::array();
 
 for( std::pair<const wxString, PCM_INSTALLATION_ENTRY>& pair : m_installed )
 {
 js["packages"].emplace_back( pair.second );
 }
 
 wxFileName f( PATHS::GetUserSettingsPath(), wxT( "installed_packages.json" ) );
 std::ofstream stream( f.GetFullPath().fn_str() );
 
 stream << std::setw( 4 ) << js << std::endl;
 }
 catch( nlohmann::detail::exception& )
 {
 // Ignore
 }
}
 
 
const std::vector<PCM_INSTALLATION_ENTRY> PLUGIN_CONTENT_MANAGER::GetInstalledPackages() const
{
 std::vector<PCM_INSTALLATION_ENTRY> v;
 
 std::for_each( m_installed.begin(), m_installed.end(),
 [&v]( const std::pair<const wxString, PCM_INSTALLATION_ENTRY>& entry )
 {
 v.push_back( entry.second );
 } );
 
 std::sort( v.begin(), v.end(),
 []( const PCM_INSTALLATION_ENTRY& a, const PCM_INSTALLATION_ENTRY& b )
 {
 return ( a.install_timestamp < b.install_timestamp )
 || ( a.install_timestamp == b.install_timestamp
 && a.package.identifier < b.package.identifier );
 } );
 
 return v;
}
 
 
const wxString&
PLUGIN_CONTENT_MANAGER::GetInstalledPackageVersion( const wxString& aPackageId ) const
{
 wxASSERT_MSG( m_installed.find( aPackageId ) != m_installed.end(),
 wxT( "Installed package not found." ) );
 
 return m_installed.at( aPackageId ).current_version;
}
 
 
bool PLUGIN_CONTENT_MANAGER::IsPackagePinned( const wxString& aPackageId ) const
{
 if( m_installed.find( aPackageId ) == m_installed.end() )
 return false;
 
 return m_installed.at( aPackageId ).pinned;
}
 
 
void PLUGIN_CONTENT_MANAGER::SetPinned( const wxString& aPackageId, const bool aPinned )
{
 if( m_installed.find( aPackageId ) == m_installed.end() )
 return;
 
 m_installed.at( aPackageId ).pinned = aPinned;
}
 
 
int PLUGIN_CONTENT_MANAGER::GetPackageSearchRank( const PCM_PACKAGE& aPackage,
 const wxString& aSearchTerm )
{
 wxArrayString terms = wxStringTokenize( aSearchTerm.Lower(), wxS( " " ), wxTOKEN_STRTOK );
 int rank = 0;
 
 const auto find_term_matches =
 [&]( const wxString& str )
 {
 int result = 0;
 wxString lower = str.Lower();
 
 for( const wxString& term : terms )
 {
 if( lower.Find( term ) != wxNOT_FOUND )
 result += 1;
 }
 
 return result;
 };
 
 // Match on package id
 if( terms.size() == 1 && terms[0] == aPackage.identifier )
 rank += 10000;
 
 if( terms.size() == 1 && find_term_matches( aPackage.identifier ) )
 rank += 1000;
 
 // Match on package name
 rank += 500 * find_term_matches( aPackage.name );
 
 // Match on tags
 for( const std::string& tag : aPackage.tags )
 rank += 100 * find_term_matches( wxString( tag ) );
 
 // Match on package description
 rank += 10 * find_term_matches( aPackage.description );
 rank += 10 * find_term_matches( aPackage.description_full );
 
 // Match on author/maintainer
 rank += find_term_matches( aPackage.author.name );
 
 if( aPackage.maintainer )
 rank += 3 * find_term_matches( aPackage.maintainer->name );
 
 // Match on resources
 for( const std::pair<const std::string, wxString>& entry : aPackage.resources )
 {
 rank += find_term_matches( entry.first );
 rank += find_term_matches( entry.second );
 }
 
 // Match on license
 if( terms.size() == 1 && terms[0] == aPackage.license )
 rank += 1;
 
 return rank;
}
 
 
std::unordered_map<wxString, wxBitmap>
PLUGIN_CONTENT_MANAGER::GetRepositoryPackageBitmaps( const wxString& aRepositoryId )
{
 std::unordered_map<wxString, wxBitmap> bitmaps;
 
 wxFileName resources_file = wxFileName( PATHS::GetUserCachePath(), wxT( "resources.zip" ) );
 resources_file.AppendDir( wxT( "pcm" ) );
 resources_file.AppendDir( aRepositoryId );
 
 if( !resources_file.FileExists() )
 return bitmaps;
 
 wxFFileInputStream stream( resources_file.GetFullPath() );
 wxZipInputStream zip( stream );
 
 if( !zip.IsOk() || zip.GetTotalEntries() == 0 )
 return bitmaps;
 
 for( wxArchiveEntry* entry = zip.GetNextEntry(); entry; entry = zip.GetNextEntry() )
 {
 wxArrayString path_parts = wxSplit( entry->GetName(), wxFileName::GetPathSeparator(),
 (wxChar) 0 );
 
 if( path_parts.size() != 2 || path_parts[1] != wxT( "icon.png" ) )
 continue;
 
 try
 {
 wxMemoryInputStream image_stream( zip, entry->GetSize() );
 wxImage image( image_stream, wxBITMAP_TYPE_PNG );
 bitmaps.emplace( path_parts[0], wxBitmap( image ) );
 }
 catch( ... )
 {
 // Log and ignore
 wxLogTrace( wxT( "Error loading png bitmap for entry %s from %s" ), entry->GetName(),
 resources_file.GetFullPath() );
 }
 }
 
 return bitmaps;
}
 
 
std::unordered_map<wxString, wxBitmap> PLUGIN_CONTENT_MANAGER::GetInstalledPackageBitmaps()
{
 std::unordered_map<wxString, wxBitmap> bitmaps;
 
 wxFileName resources_dir_fn( m_3rdparty_path, wxEmptyString );
 resources_dir_fn.AppendDir( wxT( "resources" ) );
 wxDir resources_dir( resources_dir_fn.GetPath() );
 
 if( !resources_dir.IsOpened() )
 return bitmaps;
 
 wxString subdir;
 bool more = resources_dir.GetFirst( &subdir, wxEmptyString, wxDIR_DIRS | wxDIR_HIDDEN );
 
 while( more )
 {
 wxFileName icon( resources_dir_fn.GetPath(), wxT( "icon.png" ) );
 icon.AppendDir( subdir );
 
 if( icon.FileExists() )
 {
 wxString actual_package_id = subdir;
 actual_package_id.Replace( '_', '.' );
 
 try
 {
 wxBitmap bitmap( icon.GetFullPath(), wxBITMAP_TYPE_PNG );
 bitmaps.emplace( actual_package_id, bitmap );
 }
 catch( ... )
 {
 // Log and ignore
 wxLogTrace( wxT( "Error loading png bitmap from %s" ), icon.GetFullPath() );
 }
 }
 
 more = resources_dir.GetNext( &subdir );
 }
 
 return bitmaps;
}
 
 
void PLUGIN_CONTENT_MANAGER::RunBackgroundUpdate()
{
 // If the thread is already running don't create it again
 if( m_updateThread.joinable() )
 return;
 
 m_updateBackgroundJob = Pgm().GetBackgroundJobMonitor().Create( _( "PCM Update" ) );
 
 m_updateThread = std::thread(
 [this]()
 {
 if( m_installed.size() == 0 )
 return;
 
 int maxProgress = m_repository_list.size() + m_installed.size();
 m_updateBackgroundJob->m_reporter->SetNumPhases( maxProgress );
 m_updateBackgroundJob->m_reporter->Report( _( "Preparing to fetch repositories" ) );
 
 // Only fetch repositories that have installed not pinned packages
 std::unordered_set<wxString> repo_ids;
 
 for( std::pair<const wxString, PCM_INSTALLATION_ENTRY>& pair : m_installed )
 {
 if( !pair.second.pinned )
 repo_ids.insert( pair.second.repository_id );
 }
 
 for( const auto& [ repository_id, name, url ] : m_repository_list )
 {
 m_updateBackgroundJob->m_reporter->AdvancePhase();
 if( repo_ids.count( repository_id ) == 0 )
 continue;
 
 m_updateBackgroundJob->m_reporter->Report(
 _( "Fetching repository..." ) );
 CacheRepository( repository_id );
 
 if( m_updateBackgroundJob->m_reporter->IsCancelled() )
 break;
 }
 
 if( m_updateBackgroundJob->m_reporter->IsCancelled() )
 return;
 
 // Count packages with updates
 int availableUpdateCount = 0;
 
 m_updateBackgroundJob->m_reporter->Report( _( "Reviewing packages..." ) );
 for( std::pair<const wxString, PCM_INSTALLATION_ENTRY>& pair : m_installed )
 {
 PCM_INSTALLATION_ENTRY& entry = pair.second;
 
 m_updateBackgroundJob->m_reporter->AdvancePhase();
 
 if( m_repository_cache.find( entry.repository_id ) != m_repository_cache.end() )
 {
 PCM_PACKAGE_STATE state = GetPackageState( entry.repository_id,
 entry.package.identifier );
 
 if( state == PPS_UPDATE_AVAILABLE && !entry.pinned )
 availableUpdateCount++;
 }
 
 if( m_updateBackgroundJob->m_reporter->IsCancelled() )
 return;
 }
 
 Pgm().GetBackgroundJobMonitor().Remove( m_updateBackgroundJob );
 m_updateBackgroundJob = nullptr;
 
 // Update the badge on PCM button
 m_availableUpdateCallback( availableUpdateCount );
 } );
}
 
 
void PLUGIN_CONTENT_MANAGER::StopBackgroundUpdate()
{
 if( m_updateThread.joinable() )
 {
 if( m_updateBackgroundJob )
 m_updateBackgroundJob->m_reporter->Cancel();
 
 m_updateThread.join();
 }
}
 
 
PLUGIN_CONTENT_MANAGER::~PLUGIN_CONTENT_MANAGER()
{
 // By the time object is being destroyed the thread should be
 // stopped already but just in case do it here too.
 StopBackgroundUpdate();
}