libcitadel/lib/vcard.c

   1 /*
   2  * $Id: vcard.c 5754 2007-11-16 05:52:26Z ajc $
   3  *
   4  * vCard implementation for Citadel
   5  *
   6  * Copyright (C) 1999-2008 by the citadel.org development team.
   7  * This code is freely redistributable under the terms of the GNU General
   8  * Public License.  All other rights reserved.
   9  */
  10
  11
  12 #include <stdlib.h>
  13 #include <unistd.h>
  14 #include <stdio.h>
  15 #include <fcntl.h>
  16 #include <signal.h>
  17
  18 #if TIME_WITH_SYS_TIME
  19 # include <sys/time.h>
  20 # include <time.h>
  21 #else
  22 # if HAVE_SYS_TIME_H
  23 #  include <sys/time.h>
  24 # else
  25 #  include <time.h>
  26 # endif
  27 #endif
  28
  29 #include <ctype.h>
  30 #include <string.h>
  31 #include <errno.h>
  32 #include <limits.h>
  33 #include <string.h>
  34 #include <libcitadel.h>
  35
  36
  37 /*
  38  * Constructor (empty vCard)
  39  * Returns an empty vcard
  40  */
  41 struct vCard *vcard_new() {
  42         struct vCard *v;
  43
  44         v = (struct vCard *) malloc(sizeof(struct vCard));
  45         if (v == NULL) return v;
  46
  47         v->magic = CTDL_VCARD_MAGIC;
  48         v->numprops = 0;
  49         v->prop = NULL;
  50
  51         return v;
  52 }
  53
  54 /*
  55  * Remove the "charset=" attribute from a vCard property name
  56  *
  57  */
  58 void remove_charset_attribute(char *strbuf)
  59 {
  60         int i, t;
  61         char compare[256];
  62
  63         t = num_tokens(strbuf, ';');
  64         for (i=0; i<t; ++i) {
  65                 extract_token(compare, strbuf, i, ';', sizeof compare);
  66                 striplt(compare);
  67                 if (!strncasecmp(compare, "charset=", 8)) {
  68                         remove_token(strbuf, i, ';');
  69                 }
  70         }
  71         if (!IsEmptyStr(strbuf)) {
  72                 if (strbuf[strlen(strbuf)-1] == ';') {
  73                         strbuf[strlen(strbuf)-1] = 0;
  74                 }
  75         }
  76 }
  77
  78
  79 /*
  80  * Add a property to a vCard
  81  *
  82  * v            vCard structure to which we are adding
  83  * propname     name of new property
  84  * propvalue    value of new property
  85  */
  86 void vcard_add_prop(struct vCard *v, char *propname, char *propvalue) {
  87         ++v->numprops;
  88         v->prop = realloc(v->prop,
  89                 (v->numprops * sizeof(struct vCardProp)) );
  90         v->prop[v->numprops-1].name = strdup(propname);
  91         v->prop[v->numprops-1].value = strdup(propvalue);
  92 }
  93
  94
  95
  96 /*
  97  * Constructor - returns a new struct vcard given a serialized vcard
  98  */
  99 struct vCard *vcard_load(char *vtext) {
 100         struct vCard *v;
 101         int valid = 0;
 102         char *mycopy, *ptr;
 103         char *namebuf, *valuebuf;
 104         int i;
 105         int colonpos, nlpos;
 106
 107         if (vtext == NULL) return vcard_new();
 108         mycopy = strdup(vtext);
 109         if (mycopy == NULL) return NULL;
 110
 111         /*
 112          * First, fix this big pile o' vCard to make it more parseable.
 113          * To make it easier to parse, we convert CRLF to LF, and unfold any
 114          * multi-line fields into single lines.
 115          */
 116         for (i=0; !IsEmptyStr(&mycopy[i]); ++i) {
 117                 if (!strncmp(&mycopy[i], "\r\n", 2)) {
 118                         strcpy(&mycopy[i], &mycopy[i+1]);
 119                 }
 120                 if ( (mycopy[i]=='\n') && (isspace(mycopy[i+1])) ) {
 121                         strcpy(&mycopy[i], &mycopy[i+1]);
 122                 }
 123         }
 124
 125         v = vcard_new();
 126         if (v == NULL) return v;
 127
 128         ptr = mycopy;
 129         while (!IsEmptyStr(ptr)) {
 130                 colonpos = (-1);
 131                 nlpos = (-1);
 132                 colonpos = pattern2(ptr, ":");
 133                 nlpos = pattern2(ptr, "\n");
 134
 135                 if ((nlpos > colonpos) && (colonpos > 0)) {
 136                         namebuf = malloc(colonpos + 1);
 137                         valuebuf = malloc(nlpos - colonpos + 1);
 138                         memcpy(namebuf, ptr, colonpos);
 139                         namebuf[colonpos] = '\0';
 140                         memcpy(valuebuf, &ptr[colonpos+1], nlpos-colonpos-1);
 141                         valuebuf[nlpos-colonpos-1] = '\0';
 142
 143                         if (!strcasecmp(namebuf, "end")) {
 144                                 valid = 0;
 145                         }
 146                         if (    (!strcasecmp(namebuf, "begin"))
 147                                 && (!strcasecmp(valuebuf, "vcard"))
 148                         ) {
 149                                 valid = 1;
 150                         }
 151
 152                         if ( (valid) && (strcasecmp(namebuf, "begin")) ) {
 153                                 remove_charset_attribute(namebuf);
 154                                 ++v->numprops;
 155                                 v->prop = realloc(v->prop,
 156                                         (v->numprops * sizeof(struct vCardProp))
 157                                 );
 158                                 v->prop[v->numprops-1].name = namebuf;
 159                                 v->prop[v->numprops-1].value = valuebuf;
 160                         }
 161                         else {
 162                                 free(namebuf);
 163                                 free(valuebuf);
 164                         }
 165
 166                 }
 167
 168                 while ( (*ptr != '\n') && (!IsEmptyStr(ptr)) ) {
 169                         ++ptr;
 170                 }
 171                 if (*ptr == '\n') ++ptr;
 172         }
 173
 174         free(mycopy);
 175         return v;
 176 }
 177
 178
 179 /*
 180  * Fetch the value of a particular key.
 181  * If is_partial is set to 1, a partial match is ok (for example,
 182  * a key of "tel;home" will satisfy a search for "tel").
 183  * Set "instance" to a value higher than 0 to return subsequent instances
 184  * of the same key.
 185  *
 186  * Set "get_propname" to nonzero to fetch the property name instead of value.
 187  * v            vCard to get keyvalue from
 188  * propname     key to retrieve
 189  * is_partial
 190  * instance     if nonzero return a later token of the value
 191  * get_propname if nonzero get the real property name???
 192  *
 193  * returns the requested value / token / propertyname
 194  */
 195 char *vcard_get_prop(struct vCard *v, char *propname,
 196                         int is_partial, int instance, int get_propname) {
 197         int i;
 198         int found_instance = 0;
 199
 200         if (v->numprops) for (i=0; i<(v->numprops); ++i) {
 201                 if ( (!strcasecmp(v->prop[i].name, propname))
 202                    || (propname[0] == 0)
 203                    || (  (!strncasecmp(v->prop[i].name,
 204                                         propname, strlen(propname)))
 205                          && (v->prop[i].name[strlen(propname)] == ';')
 206                          && (is_partial) ) ) {
 207                         if (instance == found_instance++) {
 208                                 if (get_propname) {
 209                                         return(v->prop[i].name);
 210                                 }
 211                                 else {
 212                                         return(v->prop[i].value);
 213                                 }
 214                         }
 215                 }
 216         }
 217
 218         return NULL;
 219 }
 220
 221
 222
 223
 224 /*
 225  * Destructor
 226  */
 227 void vcard_free(struct vCard *v) {
 228         int i;
 229
 230         if (v->magic != CTDL_VCARD_MAGIC) return;       /* Self-check */
 231
 232         if (v->numprops) for (i=0; i<(v->numprops); ++i) {
 233                 free(v->prop[i].name);
 234                 free(v->prop[i].value);
 235         }
 236
 237         if (v->prop != NULL) free(v->prop);
 238
 239         memset(v, 0, sizeof(struct vCard));
 240         free(v);
 241 }
 242
 243
 244
 245
 246 /*
 247  * Set a name/value pair in the card
 248  * v            vCard to manipulate
 249  * name         key to set
 250  * value        the value to assign to key
 251  * append       if nonzero, append rather than replace if this key already exists.
 252  */
 253 void vcard_set_prop(struct vCard *v, char *name, char *value, int append) {
 254         int i;
 255
 256         if (v->magic != CTDL_VCARD_MAGIC) return;       /* Self-check */
 257
 258         /* If this key is already present, replace it */
 259         if (!append) if (v->numprops) for (i=0; i<(v->numprops); ++i) {
 260                 if (!strcasecmp(v->prop[i].name, name)) {
 261                         free(v->prop[i].name);
 262                         free(v->prop[i].value);
 263                         v->prop[i].name = strdup(name);
 264                         v->prop[i].value = strdup(value);
 265                         return;
 266                 }
 267         }
 268
 269         /* Otherwise, append it */
 270         ++v->numprops;
 271         v->prop = realloc(v->prop,
 272                 (v->numprops * sizeof(struct vCardProp)) );
 273         v->prop[v->numprops-1].name = strdup(name);
 274         v->prop[v->numprops-1].value = strdup(value);
 275 }
 276
 277
 278
 279
 280 /*
 281  * Serialize a 'struct vcard' into an actual vcard.
 282  */
 283 char *vcard_serialize(struct vCard *v)
 284 {
 285         char *ser;
 286         int i, j;
 287         size_t len;
 288         int is_utf8 = 0;
 289
 290         if (v == NULL) return NULL;                     /* self check */
 291         if (v->magic != CTDL_VCARD_MAGIC) return NULL;  /* self check */
 292
 293         /* Set the vCard version number to 2.1 at this time. */
 294         vcard_set_prop(v, "VERSION", "2.1", 0);
 295
 296         /* Figure out how big a buffer we need to allocate */
 297         len = 64;       /* for begin, end, and a little padding for safety */
 298         if (v->numprops) for (i=0; i<(v->numprops); ++i) {
 299                 len = len +
 300                         strlen(v->prop[i].name) +
 301                         strlen(v->prop[i].value) + 16;
 302         }
 303
 304         ser = malloc(len);
 305         if (ser == NULL) return NULL;
 306
 307         safestrncpy(ser, "begin:vcard\r\n", len);
 308         if (v->numprops) for (i=0; i<(v->numprops); ++i) {
 309                 if ( (strcasecmp(v->prop[i].name, "end")) && (v->prop[i].value != NULL) ) {
 310                         is_utf8 = 0;
 311                         for (j=0; !IsEmptyStr(&v->prop[i].value[j]); ++j) {
 312                                 if ( (v->prop[i].value[j] < 32) || (v->prop[i].value[j] > 126) ) {
 313                                         is_utf8 = 1;
 314                                 }
 315                         }
 316                         strcat(ser, v->prop[i].name);
 317                         if (is_utf8) {
 318                                 strcat(ser, ";charset=UTF-8");
 319                         }
 320                         strcat(ser, ":");
 321                         strcat(ser, v->prop[i].value);
 322                         strcat(ser, "\r\n");
 323                 }
 324         }
 325         strcat(ser, "end:vcard\r\n");
 326
 327         return ser;
 328 }
 329
 330
 331
 332 /*
 333  * Convert FN (Friendly Name) into N (Name)
 334  *
 335  * vname        Supplied friendly-name
 336  * n            Target buffer to store Name
 337  * vname_size   Size of buffer
 338  */
 339 void vcard_fn_to_n(char *vname, char *n, size_t vname_size) {
 340         char lastname[256];
 341         char firstname[256];
 342         char middlename[256];
 343         char honorific_prefixes[256];
 344         char honorific_suffixes[256];
 345         char buf[256];
 346
 347         safestrncpy(buf, n, sizeof buf);
 348
 349         /* Try to intelligently convert the screen name to a
 350          * fully expanded vCard name based on the number of
 351          * words in the name
 352          */
 353         safestrncpy(lastname, "", sizeof lastname);
 354         safestrncpy(firstname, "", sizeof firstname);
 355         safestrncpy(middlename, "", sizeof middlename);
 356         safestrncpy(honorific_prefixes, "", sizeof honorific_prefixes);
 357         safestrncpy(honorific_suffixes, "", sizeof honorific_suffixes);
 358
 359         /* Honorific suffixes */
 360         if (num_tokens(buf, ',') > 1) {
 361                 extract_token(honorific_suffixes, buf, (num_tokens(buf, ' ') - 1), ',',
 362                         sizeof honorific_suffixes);
 363                 remove_token(buf, (num_tokens(buf, ',') - 1), ',');
 364         }
 365
 366         /* Find a last name */
 367         extract_token(lastname, buf, (num_tokens(buf, ' ') - 1), ' ', sizeof lastname);
 368         remove_token(buf, (num_tokens(buf, ' ') - 1), ' ');
 369
 370         /* Find honorific prefixes */
 371         if (num_tokens(buf, ' ') > 2) {
 372                 extract_token(honorific_prefixes, buf, 0, ' ', sizeof honorific_prefixes);
 373                 remove_token(buf, 0, ' ');
 374         }
 375
 376         /* Find a middle name */
 377         if (num_tokens(buf, ' ') > 1) {
 378                 extract_token(middlename, buf, (num_tokens(buf, ' ') - 1), ' ', sizeof middlename);
 379                 remove_token(buf, (num_tokens(buf, ' ') - 1), ' ');
 380         }
 381
 382         /* Anything left is probably the first name */
 383         safestrncpy(firstname, buf, sizeof firstname);
 384         striplt(firstname);
 385
 386         /* Compose the structured name */
 387         snprintf(vname, vname_size, "%s;%s;%s;%s;%s", lastname, firstname, middlename,
 388                 honorific_prefixes, honorific_suffixes);
 389 }
 390
 391
 392
 393