path: root/camel/providers/imap/camel-imap-utils.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 *  Authors: Jeffrey Stedfast <fejj@helixcode.com>
 *
 *  Copyright 2000 Helix Code, Inc. (www.helixcode.com)
 *
 *  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 2 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, write to the Free Software
 *  Foundation, Inc., 59 Temple Street #330, Boston, MA 02111-1307, USA.
 *
 */

#include <stdio.h>
#include <string.h>
#include <time.h>

#include <gtk/gtk.h>
#include "camel-imap-utils.h"
#include "string-utils.h"
#include <e-sexp.h>

#define d(x) x

char *
imap_next_word (char *buf)
{
    char *word;

    /* skip over current word */
    for (word = buf; *word && *word != ' '; word++);

    /* skip over white space */
    for ( ; *word && *word == ' '; word++);

    return word;
}

gboolean
imap_parse_list_response (char *buf, char *namespace, char **flags, char **sep, char **folder)
{
    char *word, *ep, *f;
    
    *flags = NULL;
    *sep = NULL;
    *folder = NULL;
    
    if (*buf != '*')
        return FALSE;
    
    word = imap_next_word (buf);
    if (g_strncasecmp (word, "LIST", 4) && g_strncasecmp (word, "LSUB", 4))
        return FALSE;
    
    /* get the flags */
    word = imap_next_word (word);
    if (*word != '(')
        return FALSE;
    
    word++;
    for (ep = word; *ep && *ep != ')'; ep++);
    if (*ep != ')')
        return FALSE;
    
    *flags = g_strndup (word, (gint)(ep - word));
    
    /* get the directory separator */
    word = imap_next_word (ep);
    if (*word) {
        if (!strncmp (word, "NIL", 3)) {
            *sep = NULL;
        } else {
            for (ep = word; *ep && *ep != ' '; ep++);
            *sep = g_strndup (word, (gint)(ep - word));
            string_unquote (*sep);
        }
    } else {
        return FALSE;
    }
    
    /* get the folder name */
    word = imap_next_word (word);
    *folder = g_strdup (word);
    g_strstrip (*folder);
    
    /* chop out the folder prefix */
    if (*namespace && !strncmp (*folder, namespace, strlen (namespace))) {
        f = *folder + strlen (namespace) + strlen (*sep);
        memmove (*folder, f, strlen (f) + 1);
    }
    
    string_unquote (*folder);  /* unquote the mailbox if it's quoted */
    
    return TRUE;
}

static ESExpResult *
func_and (struct _ESExp *f, int argc, struct _ESExpResult **argv, void *data)
{
    GList **list = data;
    ESExpResult *r;
    
    fprintf (stderr, "in AND func (argc = %d)\n", argc);
    if (argc > 0) {
        char **strings;
        int i;
        
        strings = g_new (char*, argc+1);
        strings[argc] = NULL;
        
        for (i = 0; i < argc; i++) {
            GList *list_head = *list;
            
            fprintf (stderr, "\tAND func: %s\n", (*list) ? (char *) (*list)->data : "(null)");
            strings[argc - (i+1)] = (*list) ? (*list)->data : g_strdup ("");
            *list = g_list_remove_link (*list, *list);
            g_list_free_1 (list_head);
        }
        
        *list = g_list_prepend (*list, g_strjoinv (" ", strings));
        fprintf (stderr, "%s\n", (char *) (*list)->data);
        
        for (i = 0 ; i < argc; i ++)
            g_free (strings[i]);
        
        g_free (strings);
    }
    
    r = e_sexp_result_new (ESEXP_RES_BOOL);
    r->value.bool = FALSE;
    
    return r;
}

static ESExpResult *
func_or (struct _ESExp *f, int argc, struct _ESExpResult **argv, void *data)
{
    GList **list = data;
    ESExpResult *r;
    
    fprintf (stderr, "in OR func (argc = %d)\n", argc);
    if (argc == 2 && (*list)->data && (*list)->next && (*list)->next->data) {
        char **strings;
        int i;
        
        strings = g_new (char*, argc+2);
        strings[0] = g_strdup ("OR");
        strings[argc+2 - 1] = NULL;
        
        for (i = 0; i < 2; i++) {
            GList *list_head = *list;
            
            fprintf (stderr, "\tOR func: %s\n", (*list) ? (char *) (*list)->data : "(null)");
            strings[argc - i] = (*list) ? (*list)->data : g_strdup ("");
            *list = g_list_remove_link (*list, *list);
            g_list_free_1 (list_head);
        }
        
        *list = g_list_prepend (*list, g_strjoinv (" ", strings));
        fprintf (stderr, "%s\n", (char *) (*list)->data);
        
        for (i = 0 ; i < argc + 2; i ++)
            g_free (strings[i]);
        
        g_free (strings);
    }
    
    r = e_sexp_result_new (ESEXP_RES_BOOL);
    r->value.bool = FALSE;
    
    return r;
}

static ESExpResult *
func_not (struct _ESExp *f, int argc, struct _ESExpResult **argv, void *data)
{
    GList **list = data;
    ESExpResult *r;
    
    fprintf (stderr, "in NOT func\n");
    /* just replace the head of the list with the NOT of it. */
    if (argc > 0) {
        char *term = (*list)->data;
        
        (*list)->data = g_strdup_printf ("NOT %s", term);
        fprintf (stderr, "%s\n", (char *) (*list)->data);
        g_free (term);
    }
    
    r = e_sexp_result_new (ESEXP_RES_BOOL);
    r->value.bool = FALSE;
    
    return r;
}

static char *tz_months [] = {
    "Jan", "Feb", "Mar", "Apr", "May", "Jun",
    "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};

static char *
format_date (time_t time, int offset)
{
    struct tm tm;
    
    time += ((offset / 100) * (60*60)) + (offset % 100)*60;
    
    d(printf("converting date %s", ctime (&time)));
    
    memcpy (&tm, gmtime (&time), sizeof (tm));

    return g_strdup_printf ("%d-%s-%04d",
                tm.tm_mday, tz_months[tm.tm_mon],
                tm.tm_year + 1900);
}

static ESExpResult *
func_lt (struct _ESExp *f, int argc, struct _ESExpResult **argv, void *data)
{
    GList **list = data;
    char *type = (*list)->data;
    time_t date = (time_t) (argv[1])->value.number;
    ESExpResult *r;
    
    fprintf (stderr, "in less-than func: (%d) (%s) (%d)\n", argc, type, (int) date);
    if (argc > 0) {
        char *string, *date_str;
        
        date_str = format_date (date, 0);
        
        if (!strcmp ("SENT", type)) {
            string = g_strdup_printf ("SENTBEFORE \"%s\"", date_str);
        } else {
            string = g_strdup_printf ("BEFORE \"%s\"", date_str);
        }
        
        (*list)->data = string;
        g_free (type);
    }
    
    r = e_sexp_result_new (ESEXP_RES_BOOL);
    r->value.bool = FALSE;
    
    return r;
}

static ESExpResult *
func_gt (struct _ESExp *f, int argc, struct _ESExpResult **argv, void *data)
{
    GList **list = data;
    char *type = (*list)->data;
    time_t date = (time_t) (argv[1])->value.number;
    ESExpResult *r;
    
    fprintf (stderr, "in greater-than func: (%d) (%s) (%d)\n", argc, type, (int) date);
    if (argc > 0) {
        char *string, *date_str;
        
        date_str = format_date (date, 0);
        
        if (!strcmp ("SENT", type)) {
            string = g_strdup_printf ("SENTSINCE \"%s\"", date_str);
        } else {
            string = g_strdup_printf ("SINCE \"%s\"", date_str);
        }
        
        (*list)->data = string;
        g_free (type);
    }
    
    r = e_sexp_result_new (ESEXP_RES_BOOL);
    r->value.bool = FALSE;
    
    return r;
}

static ESExpResult *
func_eq (struct _ESExp *f, int argc, struct _ESExpResult **argv, void *data)
{
    GList **list = data;
    char *type = (*list)->data;
    time_t date = (time_t) (argv[1])->value.number;
    ESExpResult *r;
    
    fprintf (stderr, "in equal-to func: (%d) (%s) (%d)\n", argc, type, (int) date);
    if (argc > 0) {
        char *string, *date_str;
        
        date_str = format_date (date, 0);
        
        if (!strcmp ("SENT", type)) {
            string = g_strdup_printf ("SENTON \"%s\"", date_str);
        } else {
            string = g_strdup_printf ("ON \"%s\"", date_str);
        }
        
        (*list)->data = string;
        g_free (type);
    }
    
    r = e_sexp_result_new (ESEXP_RES_BOOL);
    r->value.bool = FALSE;
    
    return r;
}

static ESExpResult *
func_match_all (struct _ESExp *f, int argc, struct _ESExpResult **argv, void *data)
{
    /* match-all doesn't have a IMAP equiv */
    ESExpResult *r;
    
    r = e_sexp_result_new (ESEXP_RES_BOOL);
    r->value.bool = FALSE;
    
    return r;
}

static ESExpResult *
func_body_contains (struct _ESExp *f, int argc, struct _ESExpResult **argv, void *data)
{
    GList **list = data;
    char *value = (*argv)->value.string;
    ESExpResult *r;
    
    if (argc > 0) {
        char *string;
        
        string = g_strdup_printf ("BODY \"%s\"", value);
        
        *list = g_list_prepend (*list, string);
    }
    
    r = e_sexp_result_new (ESEXP_RES_BOOL);
    r->value.bool = FALSE;
    
    return r;
}

static ESExpResult *
func_header_contains (struct _ESExp *f, int argc, struct _ESExpResult **argv, void *data)
{
    GList **list = data;
    char *header = (argv[0])->value.string;
    char *match = (argv[1])->value.string;
    ESExpResult *r;
    
    if (argc == 2) {
        char *string;
        string = g_strdup_printf ("HEADER %s \"%s\"", header, match);
        
        *list = g_list_prepend (*list, string);
    }
    
    r = e_sexp_result_new (ESEXP_RES_BOOL);
    r->value.bool = FALSE;
    
    return r;
}

static ESExpResult *
func_user_tag (struct _ESExp *f, int argc, struct _ESExpResult **argv, void *data)
{
    /* FIXME: what do I do here? */
    ESExpResult *r;
    
    r = e_sexp_result_new (ESEXP_RES_BOOL);
    r->value.bool = FALSE;
    
    return r;
}

static ESExpResult *
func_user_flag (struct _ESExp *f, int argc, struct _ESExpResult **argv, void *data)
{
    /* FIXME: what do I do here? */
    ESExpResult *r;
    
    r = e_sexp_result_new (ESEXP_RES_BOOL);
    r->value.bool = FALSE;
    
    return r;
}

static ESExpResult *
func_get_sent_date (struct _ESExp *f, int argc, struct _ESExpResult **argv, void *data)
{
    GList **list = data;
    ESExpResult *r;
    
    *list = g_list_prepend (*list, g_strdup ("SENT"));
    
    r = e_sexp_result_new (ESEXP_RES_BOOL);
    r->value.bool = FALSE;
    
    return r;
}

static ESExpResult *
func_get_received_date (struct _ESExp *f, int argc, struct _ESExpResult **argv, void *data)
{
    GList **list = data;
    ESExpResult *r;
    
    *list = g_list_prepend (*list, g_strdup ("RECEIVED"));
    
    r = e_sexp_result_new (ESEXP_RES_BOOL);
    r->value.bool = FALSE;
    
    return r;
}

static ESExpResult *
func_get_current_date (struct _ESExp *f, int argc, struct _ESExpResult **argv, void *data)
{
    /* FIXME: what do I do here? */
    ESExpResult *r;
    
    r = e_sexp_result_new (ESEXP_RES_BOOL);
    r->value.bool = FALSE;
    
    return r;
}

/* builtin functions */
static struct {
    char *name;
    ESExpFunc *func;
    int type;       /* set to 1 if a function can perform shortcut evaluation, or
                   doesn't execute everything, 0 otherwise */
} symbols[] = {
    { "and",               (ESExpFunc *) func_and,               0 },
    { "or",                (ESExpFunc *) func_or,                0 },
    { "not",               (ESExpFunc *) func_not,               0 },
    { "<",                 (ESExpFunc *) func_lt,                0 },
    { ">",                 (ESExpFunc *) func_gt,                0 },
    { "=",                 (ESExpFunc *) func_eq,                0 },
    { "match-all",         (ESExpFunc *) func_match_all,         0 },
    { "body-contains",     (ESExpFunc *) func_body_contains,     0 },
    { "header-contains",   (ESExpFunc *) func_header_contains,   0 },
    { "user-tag",          (ESExpFunc *) func_user_tag,          1 },
    { "user-flag",         (ESExpFunc *) func_user_flag,         1 },
    { "get-sent-date",     (ESExpFunc *) func_get_sent_date,     1 },
    { "get-received-date", (ESExpFunc *) func_get_received_date, 1 },
    { "get-current-date",  (ESExpFunc *) func_get_current_date,  1 }
};

char *
imap_translate_sexp (const char *expression)
{
    ESExp *sexp;
    ESExpResult *r;
    gchar *retval;
    GList *list = NULL;
    int i;
    
    sexp = e_sexp_new ();
    
    for (i = 0; i < sizeof (symbols) / sizeof (symbols[0]); i++) {
        if (symbols[i].type == 1) {
            e_sexp_add_ifunction (sexp, 0, symbols[i].name,
                          (ESExpIFunc *)symbols[i].func, &list);
        } else {
            e_sexp_add_function (sexp, 0, symbols[i].name,
                         symbols[i].func, &list);
        }
    }
    
    e_sexp_input_text (sexp, expression, strlen (expression));
    
    e_sexp_parse (sexp);
    
    r = e_sexp_eval (sexp);
    
    gtk_object_unref (GTK_OBJECT (sexp));
    e_sexp_result_free (r);
    
    if (list->next) {
        g_warning ("conversion to IMAP SEARCH string failed");
        retval = NULL;
        g_list_foreach (list, (GFunc)g_free, NULL);
    } else {
        retval = list->data;
    }
    
    g_list_free (list);
    
    return retval;
}