/*

Copyright (c) 2004 Carl Byington - 510 Software Group, released under
the GPL version 2 or any later version at your choice available at
http://www.fsf.org/licenses/gpl.txt

Based on readpst.c by David Smith

*/

using namespace std;

// needed for std c++ collections
#include <set>

extern "C" {
    #include "define.h"
    #include "libstrfunc.h"
    #include "libpst.h"
    #include "common.h"
    #include "timeconv.h"
    #include "lzfu.h"
}

int32_t   usage();
int32_t   version();
char       *my_stristr(char *haystack, char *needle);
char       *check_filename(char *fname);
const char *single(char *str);
const char *folded(char *str);
void        multi(const char *fmt, char *str);
char       *rfc2426_escape(char *str);
int32_t     chr_count(char *str, char x);

char *prog_name;
pst_file pstfile;
char *ldap_base  = NULL;    // 'o=some.domain.tld, c=US'
char *ldap_class = NULL;    // 'newPerson'
char *ldap_org   = NULL;    // 'o=some.domain.tld', computed from ldap_base


////////////////////////////////////////////////
// define our ordering
struct ltstr {
    bool operator()(const char* s1, const char* s2) const {
        return strcasecmp(s1, s2) < 0;
    }
};
// define our set
typedef set<const char *, ltstr>    string_set;
// make a static set to hold the cn values
static string_set all_strings;


////////////////////////////////////////////////
// helper to free all the strings in a set
//
static void free_strings(string_set &s);
static void free_strings(string_set &s)
{
    for (string_set::iterator i=s.begin(); i!=s.end(); i++) {
        free((void*)*i);
    }
    s.clear();
}


////////////////////////////////////////////////
// helper to register a string in a string set
//
static const char* register_string(string_set &s, const char *name);
static const char* register_string(string_set &s, const char *name) {
    string_set::const_iterator i = s.find(name);
    if (i != s.end()) return *i;
    char *x = strdup(name);
    s.insert(x);
    return x;
}

////////////////////////////////////////////////
// register a global string
//
static const char* register_string(const char *name);
static const char* register_string(const char *name) {
    return register_string(all_strings, name);
}


////////////////////////////////////////////////
// make a unique string
//
static const char* unique_string(const char *name);
static const char* unique_string(const char *name) {
    int  unique = 2;
    string_set::iterator i = all_strings.find(name);
    if (i == all_strings.end()) return register_string(name);
    while (true) {
        char n[strlen(name)+10];
        snprintf(n, sizeof(n), "%s %d", name, unique++);
        string_set::iterator i = all_strings.find(n);
        if (i == all_strings.end()) return register_string(n);
    }
}


////////////////////////////////////////////////
// remove leading and trailing blanks
//
static char *trim(char *name);
static char *trim(char *name) {
    char *p;
    while (*name == ' ') name++;
    p = name + strlen(name) - 1;
    while ((p >= name) && (*p == ' ')) *p-- = '\0';
    return name;
}


static void process(pst_desc_ll *d_ptr);
static void process(pst_desc_ll *d_ptr) {
    pst_item *item = NULL;
    while (d_ptr) {
        if (d_ptr->desc) {
            item = pst_parse_item(&pstfile, d_ptr);
            DEBUG_INFO(("item pointer is %p\n", item));
            if (item) {
                if (item->folder && d_ptr->child && strcasecmp(item->file_as, "Deleted Items")) {
                    //if this is a non-empty folder other than deleted items, we want to recurse into it
                    fprintf(stderr, "entering folder %s\n", item->file_as);
                    process(d_ptr->child);

                } else if (item->contact && (item->type == PST_TYPE_CONTACT)) {
                    // deal with a contact
                    char cn[1000];
                    snprintf(cn, sizeof(cn), "%s %s %s %s",
                        single(item->contact->display_name_prefix),
                        single(item->contact->first_name),
                        single(item->contact->surname),
                        single(item->contact->suffix));
                    if (strcmp(cn, "   ")) {
                        // have a valid cn
                        const char *ucn = unique_string(folded(trim(cn)));
                        printf("dn: cn=%s, %s\n", ucn, ldap_base);
                        printf("cn: %s\n", ucn);
                        if (item->contact->first_name) {
                            snprintf(cn, sizeof(cn), "%s %s",
                                single(item->contact->display_name_prefix),
                                single(item->contact->first_name));
                            printf("givenName: %s\n", trim(cn));
                        }
                        if (item->contact->surname) {
                            snprintf(cn, sizeof(cn), "%s %s",
                                single(item->contact->surname),
                                single(item->contact->suffix));
                            printf("sn: %s\n", trim(cn));
                        }
                        else if (item->contact->company_name) {
                            printf("sn: %s\n", single(item->contact->company_name));
                        }
                        else
                            printf("sn: %s\n", ucn);    // use cn as sn if we cannot find something better

                        if (item->contact->job_title)
                            printf("personalTitle: %s\n", single(item->contact->job_title));
                        if (item->contact->company_name)
                            printf("company: %s\n", single(item->contact->company_name));
                        if (item->contact->address1  && *item->contact->address1)
                            printf("mail: %s\n", single(item->contact->address1));
                        if (item->contact->address2  && *item->contact->address2)
                            printf("mail: %s\n", single(item->contact->address2));
                        if (item->contact->address3  && *item->contact->address3)
                            printf("mail: %s\n", single(item->contact->address3));
                        if (item->contact->address1a && *item->contact->address1a)
                            printf("mail: %s\n", single(item->contact->address1a));
                        if (item->contact->address2a && *item->contact->address2a)
                            printf("mail: %s\n", single(item->contact->address2a));
                        if (item->contact->address3a && *item->contact->address3a)
                            printf("mail: %s\n", single(item->contact->address3a));
                        if (item->contact->business_address) {
                            if (item->contact->business_po_box)
                                printf("postalAddress: %s\n", single(item->contact->business_po_box));
                            if (item->contact->business_street)
                                multi("postalAddress: %s\n", item->contact->business_street);
                            if (item->contact->business_city)
                                printf("l: %s\n", single(item->contact->business_city));
                            if (item->contact->business_state)
                                printf("st: %s\n", single(item->contact->business_state));
                            if (item->contact->business_postal_code)
                                printf("postalCode: %s\n", single(item->contact->business_postal_code));
                        }
                        else if (item->contact->home_address) {
                            if (item->contact->home_po_box)
                                printf("postalAddress: %s\n", single(item->contact->home_po_box));
                            if (item->contact->home_street)
                                multi("postalAddress: %s\n", item->contact->home_street);
                            if (item->contact->home_city)
                                printf("l: %s\n", single(item->contact->home_city));
                            if (item->contact->home_state)
                                printf("st: %s\n", single(item->contact->home_state));
                            if (item->contact->home_postal_code)
                                printf("postalCode: %s\n", single(item->contact->home_postal_code));
                        }
                        else if (item->contact->other_address) {
                            if (item->contact->other_po_box)
                                printf("postalAddress: %s\n", single(item->contact->other_po_box));
                            if (item->contact->other_street)
                                multi("postalAddress: %s\n", item->contact->other_street);
                            if (item->contact->other_city)
                                printf("l: %s\n", single(item->contact->other_city));
                            if (item->contact->other_state)
                                printf("st: %s\n", single(item->contact->other_state));
                            if (item->contact->other_postal_code)
                                printf("postalCode: %s\n", single(item->contact->other_postal_code));
                        }
                        if (item->contact->business_fax)
                            printf("facsimileTelephoneNumber: %s\n", single(item->contact->business_fax));
                        else if (item->contact->home_fax)
                            printf("facsimileTelephoneNumber: %s\n", single(item->contact->home_fax));

                        if (item->contact->business_phone)
                            printf("telephoneNumber: %s\n", single(item->contact->business_phone));
                        if (item->contact->home_phone)
                            printf("homePhone: %s\n", single(item->contact->home_phone));

                        if (item->contact->car_phone)
                            printf("mobile: %s\n", single(item->contact->car_phone));
                        else if (item->contact->mobile_phone)
                            printf("mobile: %s\n", single(item->contact->mobile_phone));
                        else if (item->contact->other_phone)
                            printf("mobile: %s\n", single(item->contact->other_phone));


                        if (item->comment)
                            printf("description: %s\n", single(item->comment));

                        printf("objectClass: %s\n\n", ldap_class);
                    }
                }
                else {
                    DEBUG_INFO(("item is not a contact\n"));
                }
            }
            pst_freeItem(item);
        }
        d_ptr = d_ptr->next;
    }
}


int main(int argc, char** argv) {
    pst_desc_ll *d_ptr;
    char *fname = NULL;
    char *temp = NULL;        //temporary char pointer
    char c;
    char *d_log = NULL;
    prog_name = argv[0];
    pst_item *item = NULL;

    while ((c = getopt(argc, argv, "b:c:d:Vh"))!= -1) {
        switch (c) {
        case 'b':
            ldap_base = optarg;
            temp = strchr(ldap_base, ',');
            if (temp) {
                *temp = '\0';
                ldap_org = strdup(ldap_base+2); // assume first 2 chars are o=
                *temp = ',';
            }
            break;
        case 'c':
            ldap_class = optarg;
            break;
        case 'd':
            d_log = optarg;
            break;
        case 'h':
            usage();
            exit(0);
            break;
        case 'V':
            version();
            exit(0);
            break;
        default:
            usage();
            exit(1);
            break;
        }
    }

    if ((argc > optind) && (ldap_base) && (ldap_class) && (ldap_org)) {
        fname = argv[optind];
    } else {
        usage();
        exit(2);
    }

    #ifdef DEBUG_ALL
        // force a log file
        if (!d_log) d_log = "pst2ldif.log";
    #endif
    DEBUG_INIT(d_log);
    DEBUG_REGISTER_CLOSE();
    DEBUG_ENT("main");
    RET_DERROR(pst_open(&pstfile, fname), 1, ("Error opening File\n"));
    RET_DERROR(pst_load_index(&pstfile), 2, ("Index Error\n"));

    pst_load_extended_attributes(&pstfile);

    d_ptr = pstfile.d_head; // first record is main record
    item  = (pst_item*)pst_parse_item(&pstfile, d_ptr);
    if (!item || !item->message_store) {
        DEBUG_RET();
        DIE(("main: Could not get root record\n"));
    }

    d_ptr = pst_getTopOfFolders(&pstfile, item);
    if (!d_ptr) {
        DEBUG_RET();
        DIE(("Top of folders record not found. Cannot continue\n"));
    }

    pst_freeItem(item);

    // write the ldap header
    printf("dn: %s\n", ldap_base);
    printf("o: %s\n", ldap_org);
    printf("objectClass: organization\n\n");
    printf("dn: cn=root, %s\n", ldap_base);
    printf("cn: root\n");
    printf("objectClass: %s\n\n", ldap_class);

    process(d_ptr->child);  // do the children of TOPF
    pst_close(&pstfile);
    DEBUG_RET();
    free_strings(all_strings);
    return 0;
}


int usage() {
    version();
    printf("Usage: %s [OPTIONS] {PST FILENAME}\n", prog_name);
    printf("OPTIONS:\n");
    printf("\t-h\t- Help. This screen\n");
    printf("\t-V\t- Version. Display program version\n");
    printf("\t-b ldapbase\t- set the ldap base value\n");
    printf("\t-c class   \t- set the class of the ldap objects\n");
    return 0;
}


int version() {
    printf("pst2ldif v%s\n", VERSION);
#if BYTE_ORDER == BIG_ENDIAN
    printf("Big Endian implementation being used.\n");
#elif BYTE_ORDER == LITTLE_ENDIAN
    printf("Little Endian implementation being used.\n");
#else
#  error "Byte order not supported by this library"
#endif
#ifdef __GNUC__
    printf("GCC %d.%d : %s %s\n", __GNUC__, __GNUC_MINOR__, __DATE__, __TIME__);
#endif
    return 0;
}


// my_stristr varies from strstr in that its searches are case-insensitive
char * my_stristr(char *haystack, char *needle) {
    char *x=haystack, *y=needle, *z = NULL;
    if (haystack == NULL || needle == NULL)
        return NULL;
    while (*y != '\0' && *x != '\0') {
        if (tolower(*y) == tolower(*x)) {
            // move y on one
            y++;
            if (z == NULL) {
        z = x; // store first position in haystack where a match is made
            }
        } else {
            y = needle; // reset y to the beginning of the needle
            z = NULL; // reset the haystack storage point
        }
        x++; // advance the search in the haystack
    }
    return z;
}


char *check_filename(char *fname) {
    char *t = fname;
    if (t == NULL) {
        return fname;
    }
    while ((t = strpbrk(t, "/\\:"))) {
        // while there are characters in the second string that we don't want
        *t = '_'; //replace them with an underscore
    }
    return fname;
}


const char *single(char *str) {
    if (!str) return "";
    char *ret = rfc2426_escape(str);
    char *n = strchr(ret, '\n');
    if (n) *n = '\0';
    return ret;
}


const char *folded(char *str) {
    if (!str) return "";
    char *ret = rfc2426_escape(str);
    char *n = ret;
    while ((n = strchr(n, '\n'))) {
        *n = ' ';
    }
    n = ret;
    while ((n = strchr(n, ','))) {
        *n = ' ';
    }
    return ret;
}


void multi(const char *fmt, char *str) {
    if (!str) return;
    char *ret = rfc2426_escape(str);
    char *n = ret;
    while ((n = strchr(ret, '\n'))) {
        *n = '\0';
        printf(fmt, ret);
        ret = n+1;
    }
    if (*ret) printf(fmt, ret);
}


char *rfc2426_escape(char *str) {
    static char* buf = NULL;
    char *ret, *a, *b;
    int x = 0, y, z;
    if (str == NULL)
        ret = str;
    else {

        // calculate space required to escape all the following characters
        y = chr_count(str, '\\')
          + chr_count(str, ';');
        z = chr_count(str, '\r');
        if (y == 0 && z == 0)
            // there isn't any extra space required
            ret = str;
        else {
            x = strlen(str) + y - z + 1; // don't forget room for the NUL
            buf = (char*) realloc(buf, x);
            a = str;
            b = buf;
            while (*a != '\0') {
                switch(*a) {
                    case '\\':
                    case ';' :
                        *(b++)='\\';
                        *b=*a;
                    break;
                    case '\r':  // skip cr
                        b--;
                        break;
                    default:
                        *b=*a;
                }
                b++;
                a++;
            }
            *b = '\0'; // NUL-terminate the string (buf)
            ret = buf;
        }
    }
    return ret;
}


int chr_count(char *str, char x) {
    int r = 0;
    while (*str != '\0') {
        if (*str == x)
            r++;
        str++;
    }
    return r;
}