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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 *  Authors: Jeffrey Stedfast <fejj@novell.com>
 *           Michael Zucchi <notzed@ximian.com>
 *
 *  Copyright 2004 Novell, Inc. (www.novell.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.
 *
 */


#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <string.h>
#include <ctype.h>

#include "camel-imap4-command.h"
#include "camel-imap4-engine.h"
#include "camel-imap4-stream.h"
#include "camel-imap4-utils.h"

#include "camel-imap4-search.h"


static void camel_imap4_search_class_init (CamelIMAP4SearchClass *klass);
static void camel_imap4_search_init (CamelIMAP4Search *search, CamelIMAP4SearchClass *klass);
static void camel_imap4_search_finalize (CamelObject *object);

static ESExpResult *imap4_body_contains (struct _ESExp *f, int argc, struct _ESExpResult **argv, CamelFolderSearch *search);


static CamelFolderSearchClass *parent_class = NULL;


CamelType
camel_imap4_search_get_type (void)
{
    static CamelType type = 0;
    
    if (!type) {
        type = camel_type_register (camel_folder_search_get_type (),
                        "CamelIMAP4Search",
                        sizeof (CamelIMAP4Search),
                        sizeof (CamelIMAP4SearchClass),
                        (CamelObjectClassInitFunc) camel_imap4_search_class_init,
                        NULL,
                        (CamelObjectInitFunc) camel_imap4_search_init,
                        (CamelObjectFinalizeFunc) camel_imap4_search_finalize);
    }
    
    return type;
}

static void
camel_imap4_search_class_init (CamelIMAP4SearchClass *klass)
{
    CamelFolderSearchClass *search_class = (CamelFolderSearchClass *) klass;
    
    parent_class = (CamelFolderSearchClass *) camel_type_get_global_classfuncs (CAMEL_FOLDER_SEARCH_TYPE);
    
    search_class->body_contains = imap4_body_contains;
}

static void
camel_imap4_search_init (CamelIMAP4Search *search, CamelIMAP4SearchClass *klass)
{
    search->engine = NULL;
}

static void
camel_imap4_search_finalize (CamelObject *object)
{
    ;
}


CamelFolderSearch *
camel_imap4_search_new (CamelIMAP4Engine *engine, const char *cachedir)
{
    CamelIMAP4Search *search;
    
    search = (CamelIMAP4Search *) camel_object_new (camel_imap4_search_get_type ());
    camel_folder_search_construct ((CamelFolderSearch *) search);
    search->engine = engine;
    
    return (CamelFolderSearch *) search;
}


static int
untagged_search (CamelIMAP4Engine *engine, CamelIMAP4Command *ic, guint32 index, camel_imap4_token_t *token, CamelException *ex)
{
    CamelFolderSummary *summary = ((CamelFolder *) engine->folder)->summary;
    GPtrArray *matches = ic->user_data;
    CamelMessageInfo *info;
    char uid[12];
    
    while (1) {
        if (camel_imap4_engine_next_token (engine, token, ex) == -1)
            return -1;
        
        if (token->token == '\n')
            break;
        
        if (token->token != CAMEL_IMAP4_TOKEN_NUMBER || token->v.number == 0)
            goto unexpected;
        
        sprintf (uid, "%u", token->v.number);
        if ((info = camel_folder_summary_uid (summary, uid))) {
            g_ptr_array_add (matches, (char *) camel_message_info_uid (info));
            camel_message_info_free(info);
        }
    }
    
    return 0;
    
 unexpected:
    
    camel_imap4_utils_set_unexpected_token_error (ex, engine, token);
    
    return -1;
}

static ESExpResult *
imap4_body_contains (struct _ESExp *f, int argc, struct _ESExpResult **argv, CamelFolderSearch *search)
{
    CamelIMAP4Search *imap4_search = (CamelIMAP4Search *) search;
    CamelIMAP4Engine *engine = imap4_search->engine;
    GPtrArray *strings, *matches, *infos;
    register const unsigned char *inptr;
    gboolean utf8_search = FALSE;
    GPtrArray *summary_set;
    CamelMessageInfo *info;
    CamelIMAP4Command *ic;
    const char *expr;
    ESExpResult *r;
    int id, i, n;
    size_t used;
    char *set;
    
    summary_set = search->summary_set ? search->summary_set : search->summary;
    
    /* check the simple cases */
    if (argc == 0 || summary_set->len == 0) {
        /* match nothing */
        if (search->current) {
            r = e_sexp_result_new (f, ESEXP_RES_BOOL);
            r->value.bool = FALSE;
        } else {
            r = e_sexp_result_new (f, ESEXP_RES_ARRAY_PTR);
            r->value.ptrarray = g_ptr_array_new ();
        }
        
        return r;
    } else if (argc == 1 && argv[0]->type == ESEXP_RES_STRING && argv[0]->value.string[0] == '\0') {
        /* match everything */
        if (search->current) {
            r = e_sexp_result_new (f, ESEXP_RES_BOOL);
            r->value.bool = TRUE;
        } else {
            r = e_sexp_result_new (f, ESEXP_RES_ARRAY_PTR);
            r->value.ptrarray = g_ptr_array_new ();
            g_ptr_array_set_size (r->value.ptrarray, summary_set->len);
            r->value.ptrarray->len = summary_set->len;
            for (i = 0; i < summary_set->len; i++) {
                info = g_ptr_array_index (summary_set, i);
                r->value.ptrarray->pdata[i] = (char *) camel_message_info_uid (info);
            }
        }
        
        return r;
    }
    
    strings = g_ptr_array_new ();
    for (i = 0; i < argc; i++) {
        if (argv[i]->type == ESEXP_RES_STRING && argv[i]->value.string[0] != '\0') {
            g_ptr_array_add (strings, argv[i]->value.string);
            if (!utf8_search) {
                inptr = (unsigned char *) argv[i]->value.string;
                while (*inptr != '\0') {
                    if (!isascii ((int) *inptr)) {
                        utf8_search = TRUE;
                        break;
                    }
                    
                    inptr++;
                }
            }
        }
    }
    
    if (strings->len == 0) {
        /* match everything */
        g_ptr_array_free (strings, TRUE);
        
        if (search->current) {
            r = e_sexp_result_new (f, ESEXP_RES_BOOL);
            r->value.bool = TRUE;
        } else {
            r = e_sexp_result_new (f, ESEXP_RES_ARRAY_PTR);
            r->value.ptrarray = g_ptr_array_new ();
            g_ptr_array_set_size (r->value.ptrarray, summary_set->len);
            r->value.ptrarray->len = summary_set->len;
            for (i = 0; i < summary_set->len; i++) {
                info = g_ptr_array_index (summary_set, i);
                r->value.ptrarray->pdata[i] = (char *) camel_message_info_uid (info);
            }
        }
        
        return r;
    }
    
    g_ptr_array_add (strings, NULL);
    matches = g_ptr_array_new ();
    infos = g_ptr_array_new ();
    
    if (search->current) {
        g_ptr_array_add (infos, search->current);
    } else {
        g_ptr_array_set_size (infos, summary_set->len);
        infos->len = summary_set->len;
        for (i = 0; i < summary_set->len; i++)
            infos->pdata[i] = summary_set->pdata[i];
    }
    
 retry:
    if (utf8_search && (engine->capa & CAMEL_IMAP4_CAPABILITY_utf8_search))
        expr = "UID SEARCH CHARSET UTF-8 UID %s BODY %V\r\n";
    else
        expr = "UID SEARCH UID %s BODY %V\r\n";
    
    used = strlen (expr) + (5 * (strings->len - 2));
    
    for (i = 0; i < infos->len; i += n) {
        n = camel_imap4_get_uid_set (engine, search->folder->summary, infos, i, used, &set);
        
        ic = camel_imap4_engine_queue (engine, search->folder, expr, set, strings->pdata);
        camel_imap4_command_register_untagged (ic, "SEARCH", untagged_search);
        ic->user_data = matches;
        g_free (set);
        
        while ((id = camel_imap4_engine_iterate (engine)) < ic->id && id != -1)
            ;
        
        if (id == -1 || ic->status != CAMEL_IMAP4_COMMAND_COMPLETE) {
            camel_imap4_command_unref (ic);
            goto done;
        }
        
        
        if (ic->result == CAMEL_IMAP4_RESULT_NO && utf8_search && (engine->capa & CAMEL_IMAP4_CAPABILITY_utf8_search)) {
            int j;
            
            /* might be because the server is lame and doesn't support UTF-8 */
            for (j = 0; j < ic->resp_codes->len; j++) {
                CamelIMAP4RespCode *resp = ic->resp_codes->pdata[j];
                
                if (resp->code == CAMEL_IMAP4_RESP_CODE_BADCHARSET) {
                    engine->capa &= ~CAMEL_IMAP4_CAPABILITY_utf8_search;
                    camel_imap4_command_unref (ic);
                    goto retry;
                }
            }
        }
        
        if (ic->result != CAMEL_IMAP4_RESULT_OK) {
            camel_imap4_command_unref (ic);
            break;
        }
        
        camel_imap4_command_unref (ic);
    }
    
 done:
    
    g_ptr_array_free (strings, TRUE);
    g_ptr_array_free (infos, TRUE);
    
    if (search->current) {
        const char *uid;
        
        uid = camel_message_info_uid (search->current);
        r = e_sexp_result_new (f, ESEXP_RES_BOOL);
        r->value.bool = FALSE;
        for (i = 0; i < matches->len; i++) {
            if (!strcmp (matches->pdata[i], uid)) {
                r->value.bool = TRUE;
                break;
            }
        }
        
        g_ptr_array_free (matches, TRUE);
    } else {
        r = e_sexp_result_new (f, ESEXP_RES_ARRAY_PTR);
        r->value.ptrarray = matches;
    }
    
    return r;
}