(C) Delete Local Files that Do Not Exist on the FTP Server

Demonstrates how to get a list of local files in a directory tree that do not exist on the FTP server.

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#include <C_CkFtp2.h>
#include <C_CkStringArray.h>
#include <C_CkFileAccess.h>

void ChilkatSample(void)
    {
    HCkFtp2 ftp;
    BOOL success;
    int mode;
    BOOL descendTree;
    BOOL previewOnly;
    HCkStringArray sa;
    HCkFileAccess fac;
    int numFiles;
    int i;
    const char *localFilePath;

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    ftp = CkFtp2_Create();

    CkFtp2_putHostname(ftp,"ftp.example.com");
    CkFtp2_putUsername(ftp,"login");
    CkFtp2_putPassword(ftp,"password");

    CkFtp2_putKeepSessionLog(ftp,TRUE);

    // Connect and login to the FTP server.
    success = CkFtp2_Connect(ftp);
    if (success != TRUE) {
        printf("%s\n",CkFtp2_lastErrorText(ftp));
        CkFtp2_Dispose(ftp);
        return;
    }

    // Set the current remote directory to the root of
    // the remote tree to be compared.
    success = CkFtp2_ChangeRemoteDir(ftp,"abc123");
    if (success != TRUE) {
        printf("%s\n",CkFtp2_lastErrorText(ftp));
        CkFtp2_Dispose(ftp);
        return;
    }

    // Recursively descend the local directory tree
    // and find the files that exist locally but not remotely.
    // These are the files what would be uploaded via
    // the SyncRemoteTree method call with mode = 1.
    // (Mode 1 would upload all files that do not exist on the FTP server.)

    // The actual uploading is avoided by setting the preview-only argument to TRUE.
    mode = 1;
    descendTree = TRUE;
    previewOnly = TRUE;
    success = CkFtp2_SyncRemoteTree2(ftp,"/temp/abc123",mode,descendTree,previewOnly);
    if (success != TRUE) {
        printf("%s\n",CkFtp2_lastErrorText(ftp));
        CkFtp2_Dispose(ftp);
        return;
    }

    // The files what would've been uploaded are now available in the SyncPreview property,
    // which contains a list of local file paths, one per line.
    // A program can iterate over them like this:
    sa = CkStringArray_Create();
    CkStringArray_LoadFromText(sa,CkFtp2_syncPreview(ftp));

    fac = CkFileAccess_Create();

    numFiles = CkStringArray_getCount(sa);
    i = 0;

    while ((i < numFiles)) {
        localFilePath = CkStringArray_getString(sa,i);
        printf("%s\n",localFilePath);

        // An application can delete the file using Chilkat's file access object,
        // or it can choose to use the native file API available in the programming language:
        success = CkFileAccess_FileDelete(fac,localFilePath);
        if (success != TRUE) {
            printf("Failed to delete: %s\n",localFilePath);
        }

        i = i + 1;
    }

    success = CkFtp2_Disconnect(ftp);


    CkFtp2_Dispose(ftp);
    CkStringArray_Dispose(sa);
    CkFileAccess_Dispose(fac);

    }