FileManager.cpp

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// ======================================================================
// \title  FileManager.hpp
// \author bocchino
// \brief  hpp file for FileManager component implementation class
//
// \copyright
// Copyright 2009-2015, by the California Institute of Technology.
// ALL RIGHTS RESERVED.  United States Government Sponsorship
// acknowledged.
//
// ======================================================================

#include <cstdio>
#include <cstdlib>

#include <Fw/FPrimeBasicTypes.hpp>
#include "Fw/Types/Assert.hpp"
#include "Fw/Types/ExternalString.hpp"
#include "Os/Directory.hpp"
#include "Svc/FileManager/FileManager.hpp"
#include "config/FileManagerConfig.hpp"

namespace Svc {

// ----------------------------------------------------------------------
// Construction, initialization, and destruction
// ----------------------------------------------------------------------

FileManager ::FileManager(const char* const compName  
                          )
    : FileManagerComponentBase(compName),
      commandCount(0),
      errorCount(0),
      m_listState(IDLE),
      m_totalEntries(0),
      m_currentOpCode(0),
      m_currentCmdSeq(0) {}

FileManager ::~FileManager() {}

// ----------------------------------------------------------------------
// Command handler implementations
// ----------------------------------------------------------------------

void FileManager ::CreateDirectory_cmdHandler(const FwOpcodeType opCode,
                                              const U32 cmdSeq,
                                              const Fw::CmdStringArg& dirName) {
    Fw::LogStringArg logStringDirName(dirName.toChar());
    this->log_ACTIVITY_HI_CreateDirectoryStarted(logStringDirName);
    bool errorIfDirExists = true;
    const Os::FileSystem::Status status = Os::FileSystem::createDirectory(dirName.toChar(), errorIfDirExists);
    if (status != Os::FileSystem::OP_OK) {
        this->log_WARNING_HI_DirectoryCreateError(logStringDirName, status);
    } else {
        this->log_ACTIVITY_HI_CreateDirectorySucceeded(logStringDirName);
    }
    this->emitTelemetry(status);
    this->sendCommandResponse(opCode, cmdSeq, status);
}

void FileManager ::RemoveFile_cmdHandler(const FwOpcodeType opCode,
                                         const U32 cmdSeq,
                                         const Fw::CmdStringArg& fileName,
                                         const bool ignoreErrors) {
    Fw::LogStringArg logStringFileName(fileName.toChar());
    this->log_ACTIVITY_HI_RemoveFileStarted(logStringFileName);
    const Os::FileSystem::Status status = Os::FileSystem::removeFile(fileName.toChar());
    if (status != Os::FileSystem::OP_OK) {
        this->log_WARNING_HI_FileRemoveError(logStringFileName, status);
        if (ignoreErrors == true) {
            ++this->errorCount;
            this->tlmWrite_Errors(this->errorCount);
            this->cmdResponse_out(opCode, cmdSeq, Fw::CmdResponse::OK);
            return;
        }
    } else {
        this->log_ACTIVITY_HI_RemoveFileSucceeded(logStringFileName);
    }
    this->emitTelemetry(status);
    this->sendCommandResponse(opCode, cmdSeq, status);
}

void FileManager ::MoveFile_cmdHandler(const FwOpcodeType opCode,
                                       const U32 cmdSeq,
                                       const Fw::CmdStringArg& sourceFileName,
                                       const Fw::CmdStringArg& destFileName) {
    Fw::LogStringArg logStringSource(sourceFileName.toChar());
    Fw::LogStringArg logStringDest(destFileName.toChar());
    this->log_ACTIVITY_HI_MoveFileStarted(logStringSource, logStringDest);
    const Os::FileSystem::Status status = Os::FileSystem::moveFile(sourceFileName.toChar(), destFileName.toChar());
    if (status != Os::FileSystem::OP_OK) {
        this->log_WARNING_HI_FileMoveError(logStringSource, logStringDest, status);
    } else {
        this->log_ACTIVITY_HI_MoveFileSucceeded(logStringSource, logStringDest);
    }
    this->emitTelemetry(status);
    this->sendCommandResponse(opCode, cmdSeq, status);
}

void FileManager ::RemoveDirectory_cmdHandler(const FwOpcodeType opCode,
                                              const U32 cmdSeq,
                                              const Fw::CmdStringArg& dirName) {
    Fw::LogStringArg logStringDirName(dirName.toChar());
    this->log_ACTIVITY_HI_RemoveDirectoryStarted(logStringDirName);
    const Os::FileSystem::Status status = Os::FileSystem::removeDirectory(dirName.toChar());
    if (status != Os::FileSystem::OP_OK) {
        this->log_WARNING_HI_DirectoryRemoveError(logStringDirName, status);
    } else {
        this->log_ACTIVITY_HI_RemoveDirectorySucceeded(logStringDirName);
    }
    this->emitTelemetry(status);
    this->sendCommandResponse(opCode, cmdSeq, status);
}

void FileManager ::ShellCommand_cmdHandler(const FwOpcodeType opCode,
                                           const U32 cmdSeq,
                                           const Fw::CmdStringArg& command,
                                           const Fw::CmdStringArg& logFileName) {
    Fw::LogStringArg logStringCommand(command.toChar());
    this->log_ACTIVITY_HI_ShellCommandStarted(logStringCommand);
    int status = this->systemCall(command, logFileName);
    if (status == 0) {
        this->log_ACTIVITY_HI_ShellCommandSucceeded(logStringCommand);
    } else {
        this->log_WARNING_HI_ShellCommandFailed(logStringCommand, static_cast<U32>(status));
    }
    this->emitTelemetry(status == 0 ? Os::FileSystem::OP_OK : Os::FileSystem::OTHER_ERROR);
    this->sendCommandResponse(opCode, cmdSeq, status == 0 ? Os::FileSystem::OP_OK : Os::FileSystem::OTHER_ERROR);
}

void FileManager ::AppendFile_cmdHandler(const FwOpcodeType opCode,
                                         const U32 cmdSeq,
                                         const Fw::CmdStringArg& source,
                                         const Fw::CmdStringArg& target) {
    Fw::LogStringArg logStringSource(source.toChar());
    Fw::LogStringArg logStringTarget(target.toChar());
    this->log_ACTIVITY_HI_AppendFileStarted(logStringSource, logStringTarget);

    Os::FileSystem::Status status;
    status = Os::FileSystem::appendFile(source.toChar(), target.toChar(), true);
    if (status != Os::FileSystem::OP_OK) {
        this->log_WARNING_HI_AppendFileFailed(logStringSource, logStringTarget, status);
    } else {
        this->log_ACTIVITY_HI_AppendFileSucceeded(logStringSource, logStringTarget);
    }

    this->emitTelemetry(status);
    this->sendCommandResponse(opCode, cmdSeq, status);
}

void FileManager ::FileSize_cmdHandler(const FwOpcodeType opCode, const U32 cmdSeq, const Fw::CmdStringArg& fileName) {
    Fw::LogStringArg logStringFileName(fileName.toChar());
    this->log_ACTIVITY_HI_FileSizeStarted(logStringFileName);

    FwSizeType size_arg;
    const Os::FileSystem::Status status = Os::FileSystem::getFileSize(fileName.toChar(), size_arg);
    if (status != Os::FileSystem::OP_OK) {
        this->log_WARNING_HI_FileSizeError(logStringFileName, status);
    } else {
        this->log_ACTIVITY_HI_FileSizeSucceeded(logStringFileName, size_arg);
    }
    this->emitTelemetry(status);
    this->sendCommandResponse(opCode, cmdSeq, status);
}

void FileManager ::ListDirectory_cmdHandler(const FwOpcodeType opCode,
                                            const U32 cmdSeq,
                                            const Fw::CmdStringArg& dirName) {
    // Check if we're already listing a directory
    if (m_listState == LISTING_IN_PROGRESS) {
        this->log_WARNING_HI_ListDirectoryError(dirName, static_cast<U32>(Os::Directory::OTHER_ERROR));
        this->sendCommandResponse(opCode, cmdSeq, Os::FileSystem::OTHER_ERROR);
        return;
    }

    this->log_ACTIVITY_HI_ListDirectoryStarted(dirName);

    // Open the directory for reading
    Os::Directory::Status status = m_currentDir.open(dirName.toChar(), Os::Directory::OpenMode::READ);

    if (status != Os::Directory::OP_OK) {
        this->log_WARNING_HI_ListDirectoryError(dirName, static_cast<U32>(status));
        this->emitTelemetry(Os::FileSystem::OTHER_ERROR);
        this->sendCommandResponse(opCode, cmdSeq, Os::FileSystem::OTHER_ERROR);
        return;
    }

    // Initialize state machine for asynchronous processing
    m_listState = LISTING_IN_PROGRESS;
    m_currentDirName = dirName;
    m_currentOpCode = opCode;
    m_currentCmdSeq = cmdSeq;
    m_totalEntries = 0;

    // Directory listing will be processed asynchronously by the rate group.
    // The schedIn_handler will process FILES_PER_RATE_TICK directory entries per rate tick to
    // prevent event flooding while maintaining configurable performance.
    // Command response will be sent when listing completes.
}

void FileManager ::pingIn_handler(const FwIndexType portNum, U32 key) {
    // return key
    this->pingOut_out(0, key);
}

void FileManager ::schedIn_handler(const FwIndexType portNum, U32 context) {
    // Only process if we're in the middle of a directory listing
    if (m_listState == LISTING_IN_PROGRESS) {
        // Process multiple files per rate tick based on configuration
        for (U32 fileCount = 0; fileCount < Svc::FileManagerConfig::FILES_PER_RATE_TICK; fileCount++) {
            Fw::String filename;
            Os::Directory::Status status = m_currentDir.read(filename);

            if (status == Os::Directory::NO_MORE_FILES) {
                // We're done listing - close directory and send response
                m_currentDir.close();
                m_listState = IDLE;

                this->log_ACTIVITY_HI_ListDirectorySucceeded(m_currentDirName, m_totalEntries);
                this->emitTelemetry(Os::FileSystem::OP_OK);
                this->sendCommandResponse(m_currentOpCode, m_currentCmdSeq, Os::FileSystem::OP_OK);
                break;  // Exit the loop since we're done

            } else if (status == Os::Directory::OP_OK) {
                // Construct full path for type checking
                Fw::String fullPath;
                fullPath.format("%s/%s", m_currentDirName.toChar(), filename.toChar());

                // Determine entry type
                Os::FileSystem::PathType pathType = Os::FileSystem::getPathType(fullPath.toChar());

                if (pathType == Os::FileSystem::FILE) {
                    // Regular file: get size and emit file event
                    FwSizeType fileSize;
                    Os::FileSystem::Status sizeStatus = Os::FileSystem::getFileSize(fullPath.toChar(), fileSize);
                    this->log_ACTIVITY_HI_DirectoryListing(
                        m_currentDirName, filename,
                        (sizeStatus == Os::FileSystem::OP_OK) ? fileSize : static_cast<FwSizeType>(0));
                } else if (pathType == Os::FileSystem::DIRECTORY) {
                    // Subdirectory: emit subdirectory event
                    this->log_ACTIVITY_HI_DirectoryListingSubdir(m_currentDirName, filename);
                } else {
                    // Special file or inaccessible: treat as file with 0 size
                    this->log_ACTIVITY_HI_DirectoryListing(m_currentDirName, filename, static_cast<FwSizeType>(0));
                }

                m_totalEntries++;

            } else {
                // Error reading directory - close and send error response
                m_currentDir.close();
                m_listState = IDLE;

                this->log_WARNING_HI_ListDirectoryError(m_currentDirName, static_cast<U32>(status));
                this->emitTelemetry(Os::FileSystem::OTHER_ERROR);
                this->sendCommandResponse(m_currentOpCode, m_currentCmdSeq, Os::FileSystem::OTHER_ERROR);
                break;  // Exit the loop since we had an error
            }
        }
    }
}

// ----------------------------------------------------------------------
// Helper methods
// ----------------------------------------------------------------------

int FileManager ::systemCall(const Fw::CmdStringArg& command, const Fw::CmdStringArg& logFileName) const {
    // Create a buffer of at least enough size for storing the eval string less the 2 %s tokens, two command strings,
    // and a null terminator at the end
    const char evalStr[] = "eval '%s' 1>>%s 2>&1\n";
    constexpr U32 bufferSize = (sizeof(evalStr) - 4) + (2 * FW_CMD_STRING_MAX_SIZE) + 1;
    char buffer[bufferSize];

    // Wrap that buffer in an external string for formatting purposes
    Fw::ExternalString stringBuffer(buffer, bufferSize);
    Fw::FormatStatus formatStatus = stringBuffer.format(evalStr, command.toChar(), logFileName.toChar());
    // Since the buffer is exactly sized, the only error can occur is a software error not caused by ground
    FW_ASSERT(formatStatus == Fw::FormatStatus::SUCCESS);

    // Call the system
    const int status = system(stringBuffer.toChar());
    return status;
}

void FileManager ::emitTelemetry(const Os::FileSystem::Status status) {
    if (status == Os::FileSystem::OP_OK) {
        ++this->commandCount;
        this->tlmWrite_CommandsExecuted(this->commandCount);
    } else {
        ++this->errorCount;
        this->tlmWrite_Errors(this->errorCount);
    }
}

void FileManager ::sendCommandResponse(const FwOpcodeType opCode,
                                       const U32 cmdSeq,
                                       const Os::FileSystem::Status status) {
    this->cmdResponse_out(opCode, cmdSeq,
                          (status == Os::FileSystem::OP_OK) ? Fw::CmdResponse::OK : Fw::CmdResponse::EXECUTION_ERROR);
}

}  // namespace Svc