design_block_library_adapter.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright The KiCad Developers, see AUTHORS.txt for contributors.
 * @author Jon Evans <[email protected]>
 *
 * 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/>.
 */
 
 
#include "design_block.h"
 
 
#include <design_block_library_adapter.h>
#include <design_block_io.h>
#include <env_vars.h>
#include <ki_exception.h>
#include <thread_pool.h>
#include <trace_helpers.h>
 
#include <set>
#include <magic_enum.hpp>
#include <wx/log.h>
 
 
std::map<wxString, LIB_DATA> DESIGN_BLOCK_LIBRARY_ADAPTER::GlobalLibraries;
 
std::mutex DESIGN_BLOCK_LIBRARY_ADAPTER::GlobalLibraryMutex;
 
 
DESIGN_BLOCK_LIBRARY_ADAPTER::DESIGN_BLOCK_LIBRARY_ADAPTER( LIBRARY_MANAGER& aManager ) :
        LIBRARY_MANAGER_ADAPTER( aManager )
{
}
 
 
wxString DESIGN_BLOCK_LIBRARY_ADAPTER::GlobalPathEnvVariableName()
{
    return ENV_VAR::GetVersionedEnvVarName( wxS( "DESIGN_BLOCK_DIR" ) );
}
 
 
DESIGN_BLOCK_IO* DESIGN_BLOCK_LIBRARY_ADAPTER::plugin( const LIB_DATA* aRow )
{
    DESIGN_BLOCK_IO* ret = dynamic_cast<DESIGN_BLOCK_IO*>( aRow->plugin.get() );
    wxCHECK( aRow->plugin && ret, nullptr );
    return ret;
}
 
 
LIBRARY_RESULT<IO_BASE*> DESIGN_BLOCK_LIBRARY_ADAPTER::createPlugin( const LIBRARY_TABLE_ROW* row )
{
    // TODO(JE) do we maintain a precondition that URIs are absolute paths after expansion?
    DESIGN_BLOCK_IO_MGR::DESIGN_BLOCK_FILE_T type = DESIGN_BLOCK_IO_MGR::EnumFromStr( row->Type() );
 
    if( type == DESIGN_BLOCK_IO_MGR::DESIGN_BLOCK_FILE_UNKNOWN )
    {
        wxLogTrace( traceLibraries, "Sym: Plugin type %s is unknown!", row->Type() );
        wxString msg =
            wxString::Format( _( "Unknown library type %s " ), row->Type() );
        return tl::unexpected( LIBRARY_ERROR( msg ) );
    }
 
    DESIGN_BLOCK_IO* plugin = DESIGN_BLOCK_IO_MGR::FindPlugin( type );
    wxCHECK( plugin, tl::unexpected( LIBRARY_ERROR( _( "Internal error" ) ) ) );
 
    return plugin;
}
 
 
void DESIGN_BLOCK_LIBRARY_ADAPTER::AsyncLoad()
{
    // TODO(JE) library tables - how much of this can be shared with other library types?
    // TODO(JE) any reason to clean these up earlier?
    std::erase_if( m_futures,
                   []( const std::future<void>& aFuture ) { return aFuture.valid(); } );
 
    if( !m_futures.empty() )
    {
        wxLogTrace( traceLibraries, "DB: Cannot AsyncLoad, futures from a previous call remain!" );
        return;
    }
 
    std::vector<LIBRARY_TABLE_ROW*> rows = m_manager.Rows( LIBRARY_TABLE_TYPE::DESIGN_BLOCK );
 
    m_loadTotal = rows.size();
    m_loadCount.store( 0 );
 
    if( m_loadTotal == 0 )
    {
        wxLogTrace( traceLibraries, "DB: AsyncLoad: no libraries left to load; exiting" );
        std::lock_guard lock( GlobalLibraryMutex );
        std::lock_guard projectLock( m_libraries_mutex );
        GlobalLibraries.clear();
        m_libraries.clear();
        return;
    }
 
    thread_pool& tp = GetKiCadThreadPool();
 
    auto check =
        []( const wxString& aLib, std::map<wxString, LIB_DATA>& aMap, std::mutex& aMutex )
        {
            std::lock_guard lock( aMutex );
 
            if( aMap.contains( aLib ) )
            {
                if( aMap[aLib].status.load_status == LOAD_STATUS::LOADED )
                    return true;
 
                aMap.erase( aLib );
            }
 
            return false;
        };
 
    std::set<wxString> libNamesCurrentlyValid;
 
    for( const LIBRARY_TABLE_ROW* row : rows )
    {
        LIBRARY_TABLE_SCOPE scope = row->Scope();
        const wxString& nickname = row->Nickname();
 
        libNamesCurrentlyValid.insert( nickname );
 
        // TODO(JE) library tables -- check for modified global files
        if( check( nickname, m_libraries, m_libraries_mutex ) )
        {
            --m_loadTotal;
            continue;
        }
 
        if( check( nickname, GlobalLibraries, GlobalLibraryMutex ) )
        {
            --m_loadTotal;
            continue;
        }
 
        m_futures.emplace_back( tp.submit_task(
            [this, nickname, scope]()
            {
                if( m_abort.load() )
                    return;
 
                LIBRARY_RESULT<LIB_DATA*> result = loadIfNeeded( nickname );
 
                if( result.has_value() )
                {
                    LIB_DATA* lib = *result;
                    wxArrayString dummyList;
                    std::lock_guard lock ( lib->mutex );
                    lib->status.load_status = LOAD_STATUS::LOADING;
 
                    std::map<std::string, UTF8> options = lib->row->GetOptionsMap();
 
                    try
                    {
                        plugin( lib )->DesignBlockEnumerate( dummyList, getUri( lib->row ), false, &options );
                        wxLogTrace( traceLibraries, "DB: %s: library enumerated %zu items", nickname, dummyList.size() );
                        lib->status.load_status = LOAD_STATUS::LOADED;
                    }
                    catch( IO_ERROR& e )
                    {
                        lib->status.load_status = LOAD_STATUS::LOAD_ERROR;
                        lib->status.error = LIBRARY_ERROR( { e.What() } );
                        wxLogTrace( traceLibraries, "DB: %s: plugin threw exception: %s", nickname, e.What() );
                    }
                }
                else
                {
                    switch( scope )
                    {
                    case LIBRARY_TABLE_SCOPE::GLOBAL:
                    {
                        std::lock_guard lock( GlobalLibraryMutex );
 
                        GlobalLibraries[nickname].status = LIB_STATUS( {
                            .load_status = LOAD_STATUS::LOAD_ERROR,
                            .error = result.error()
                        } );
 
                        break;
                    }
 
                    case LIBRARY_TABLE_SCOPE::PROJECT:
                    {
                        wxLogTrace( traceLibraries, "DB: project library error: %s: %s", nickname, result.error().message );
                        std::lock_guard lock( m_libraries_mutex );
 
                        m_libraries[nickname].status = LIB_STATUS( {
                            .load_status = LOAD_STATUS::LOAD_ERROR,
                            .error = result.error()
                        } );
 
                        break;
                    }
 
                    default:
                        wxFAIL_MSG( "Unexpected library table scope" );
                    }
                }
 
                ++m_loadCount;
            } ) );
    }
 
    // Cleanup libraries that were removed from the table
    {
        std::lock_guard lock( GlobalLibraryMutex );
        std::erase_if( GlobalLibraries, [&]( const auto& pair )
                {
                    return libNamesCurrentlyValid.contains( pair.first );
                } );
    }
 
    {
        std::lock_guard lock( m_libraries_mutex );
        std::erase_if( m_libraries, [&]( const auto& pair )
                {
                    return libNamesCurrentlyValid.contains( pair.first );
                } );
    }
 
    if( m_loadTotal > 0 )
        wxLogTrace( traceLibraries, "DB: Started async load of %zu libraries", m_loadTotal );
}
 
 
std::vector<DESIGN_BLOCK*> DESIGN_BLOCK_LIBRARY_ADAPTER::GetDesignBlocks( const wxString& aNickname )
{
    std::vector<DESIGN_BLOCK*> blocks;
 
    std::optional<const LIB_DATA*> maybeLib = fetchIfLoaded( aNickname );
 
    if( !maybeLib )
        return blocks;
 
    const LIB_DATA* lib = *maybeLib;
    std::map<std::string, UTF8> options = lib->row->GetOptionsMap();
    wxArrayString blockNames;
 
    try
    {
        plugin( lib )->DesignBlockEnumerate( blockNames, getUri( lib->row ), false, &options );
    }
    catch( IO_ERROR& e )
    {
        wxLogTrace( traceLibraries, "DB: Exception enumerating library %s: %s",
                    lib->row->Nickname(), e.What() );
    }
 
    for( const wxString& blockName : blockNames )
    {
        try
        {
            blocks.emplace_back( plugin( lib )->DesignBlockLoad( getUri( lib->row ), blockName, false, &options ) );
        }
        catch( IO_ERROR& e )
        {
            wxLogTrace( traceLibraries, "DB: Exception enumerating design block %s: %s", blockName, e.What() );
        }
    }
 
    return blocks;
}
 
 
std::vector<wxString> DESIGN_BLOCK_LIBRARY_ADAPTER::GetDesignBlockNames( const wxString& aNickname )
{
    // TODO(JE) can we kill wxArrayString in internal API?
    wxArrayString namesAS;
    std::vector<wxString> names;
 
    if( std::optional<const LIB_DATA*> maybeLib = fetchIfLoaded( aNickname ) )
    {
        const LIB_DATA* lib = *maybeLib;
        std::map<std::string, UTF8> options = lib->row->GetOptionsMap();
 
        plugin( lib )->DesignBlockEnumerate( namesAS, getUri( lib->row ), true, &options );
    }
 
    for( const wxString& name : namesAS )
        names.emplace_back( name );
 
    return names;
}
 
 
DESIGN_BLOCK* DESIGN_BLOCK_LIBRARY_ADAPTER::LoadDesignBlock( const wxString& aNickname,
        const wxString& aDesignBlockName, bool aKeepUUID )
{
    if( std::optional<const LIB_DATA*> maybeLib = fetchIfLoaded( aNickname ) )
    {
        const LIB_DATA* lib = *maybeLib;
        std::map<std::string, UTF8> options = lib->row->GetOptionsMap();
 
        DESIGN_BLOCK* db = plugin( lib )->DesignBlockLoad( getUri( lib->row ), aDesignBlockName, aKeepUUID, &options );
        db->GetLibId().SetLibNickname( aNickname );
        return db;
    }
 
    return nullptr;
}
 
 
bool DESIGN_BLOCK_LIBRARY_ADAPTER::DesignBlockExists( const wxString& aNickname, const wxString& aDesignBlockName )
{
    if( std::optional<const LIB_DATA*> maybeLib = fetchIfLoaded( aNickname ) )
    {
        const LIB_DATA* lib = *maybeLib;
        std::map<std::string, UTF8> options = lib->row->GetOptionsMap();
 
        return plugin( lib )->DesignBlockExists( getUri( lib->row ), aDesignBlockName, &options );
    }
 
    return false;
}
 
 
const DESIGN_BLOCK* DESIGN_BLOCK_LIBRARY_ADAPTER::GetEnumeratedDesignBlock( const wxString& aNickname,
        const wxString& aDesignBlockName )
{
    if( std::optional<const LIB_DATA*> maybeLib = fetchIfLoaded( aNickname ) )
    {
        const LIB_DATA* lib = *maybeLib;
        std::map<std::string, UTF8> options = lib->row->GetOptionsMap();
 
        return plugin( lib )->GetEnumeratedDesignBlock( getUri( lib->row ), aDesignBlockName, &options );
    }
 
    return nullptr;
}
 
 
DESIGN_BLOCK_LIBRARY_ADAPTER::SAVE_T DESIGN_BLOCK_LIBRARY_ADAPTER::SaveDesignBlock( const wxString& aNickname,
        const DESIGN_BLOCK* aDesignBlock, bool aOverwrite )
{
    if( std::optional<const LIB_DATA*> maybeLib = fetchIfLoaded( aNickname ) )
    {
        const LIB_DATA* lib = *maybeLib;
        std::map<std::string, UTF8> options = lib->row->GetOptionsMap();
 
        if( !aOverwrite && plugin( lib )->DesignBlockExists( getUri( lib->row ), aDesignBlock->GetName(), &options ) )
            return SAVE_SKIPPED;
 
        plugin( lib )->DesignBlockSave( getUri( lib->row ), aDesignBlock, &options );
    }
 
    return SAVE_OK;
}
 
 
void DESIGN_BLOCK_LIBRARY_ADAPTER::DeleteDesignBlock( const wxString& aNickname,
                                                      const wxString& aDesignBlockName )
{
    if( std::optional<const LIB_DATA*> maybeLib = fetchIfLoaded( aNickname ) )
    {
        const LIB_DATA* lib = *maybeLib;
        std::map<std::string, UTF8> options = lib->row->GetOptionsMap();
        return plugin( lib )->DesignBlockDelete( getUri( lib->row ), aDesignBlockName, &options );
    }
}
 
 
bool DESIGN_BLOCK_LIBRARY_ADAPTER::IsDesignBlockLibWritable( const wxString& aNickname )
{
    if( std::optional<const LIB_DATA*> maybeLib = fetchIfLoaded( aNickname ) )
    {
        const LIB_DATA* lib = *maybeLib;
        return plugin( lib )->IsLibraryWritable( getUri( lib->row ) );
    }
 
    return false;
}
 
 
DESIGN_BLOCK* DESIGN_BLOCK_LIBRARY_ADAPTER::DesignBlockLoadWithOptionalNickname( const LIB_ID& aDesignBlockId,
        bool aKeepUUID )
{
    wxString nickname = aDesignBlockId.GetLibNickname();
    wxString DesignBlockname = aDesignBlockId.GetLibItemName();
 
    if( nickname.size() )
        return LoadDesignBlock( nickname, DesignBlockname, aKeepUUID );
 
    // nickname is empty, sequentially search (alphabetically) all libs/nicks for first match:
    for( const wxString& library : GetLibraryNames() )
    {
        // DesignBlockLoad() returns NULL on not found, does not throw exception
        // unless there's an IO_ERROR.
        if( DESIGN_BLOCK* ret = LoadDesignBlock( library, DesignBlockname, aKeepUUID ) )
            return ret;
    }
 
    return nullptr;
}
 
 
std::optional<LIBRARY_ERROR> DESIGN_BLOCK_LIBRARY_ADAPTER::LibraryError( const wxString& aNickname ) const
{
    // TODO(JE) library tables
    return std::nullopt;
}