src/imap/cmd-subscribe.c

	cmd-subscribe.c revision 2615df45a8027948a474abe5e817b34b0499c171
/* Copyright (c) 2002-2009 Dovecot authors, see the included COPYING file */

#include "imap-common.h"
#include "imap-commands.h"
#include "mail-namespace.h"

static bool have_listable_namespace_prefix(struct mail_namespace *ns,
                       const char *name)
{
    unsigned int name_len = strlen(name);

    for (; ns != NULL; ns = ns->next) {
        if ((ns->flags & (NAMESPACE_FLAG_LIST_PREFIX |
                  NAMESPACE_FLAG_LIST_CHILDREN)) == 0)
            continue;

        if (ns->prefix_len <= name_len)
            continue;

        /* if prefix has multiple hierarchies, allow subscribing to
           any of the hierarchies */
        if (strncmp(ns->prefix, name, name_len) == 0 &&
            ns->prefix[name_len] == ns->sep)
            return TRUE;
    }
    return FALSE;
}

bool cmd_subscribe_full(struct client_command_context *cmd, bool subscribe)
{
    struct mail_namespace *ns, *real_ns;
    const char *mailbox, *verify_name, *real_name;

    /* <mailbox> */
    if (!client_read_string_args(cmd, 1, &mailbox))
        return FALSE;
    verify_name = mailbox;

    real_name = mailbox;
    real_ns = client_find_namespace(cmd, &real_name);
    if (real_ns == NULL)
        return TRUE;

    /* now find a namespace where the subscription can be added to */
    ns = mail_namespace_find_subscribable(cmd->client->user->namespaces,
                          &mailbox);
    if (ns == NULL) {
        client_send_tagline(cmd, "NO Unknown subscription namespace.");
        return TRUE;
    }

    if (ns != real_ns) {
        /* subscription is being written to a different namespace
           than where the mailbox exists. */
        mailbox = t_strconcat(real_ns->prefix, real_name, NULL);
        /* drop the common prefix */
        i_assert(strncmp(ns->prefix, mailbox, strlen(ns->prefix)) == 0);
        mailbox += strlen(ns->prefix);
    }

    if ((cmd->client->workarounds & WORKAROUND_TB_EXTRA_MAILBOX_SEP) != 0 &&
        *mailbox != '\0' && mailbox[strlen(mailbox)-1] ==
        mailbox_list_get_hierarchy_sep(ns->list)) {
        /* verify the validity without the trailing '/' */
        verify_name = t_strndup(verify_name, strlen(verify_name)-1);
    }

    if (have_listable_namespace_prefix(cmd->client->user->namespaces,
                       verify_name)) {
        /* subscribing to a listable namespace prefix, allow it. */
    } else {
        if (!client_verify_mailbox_name(cmd, verify_name,
                        subscribe, FALSE))
            return TRUE;
    }

    if (mailbox_list_set_subscribed(ns->list, mailbox, subscribe) < 0)
        client_send_list_error(cmd, ns->list);
    else {
        client_send_tagline(cmd, subscribe ?
                    "OK Subscribe completed." :
                    "OK Unsubscribe completed.");
    }
    return TRUE;
}

bool cmd_subscribe(struct client_command_context *cmd)
{
    return cmd_subscribe_full(cmd, TRUE);
}