src/imap/cmd-namespace.c

/* Copyright (c) 2003-2018 Dovecot authors, see the included COPYING file */

#include "imap-common.h"
#include "str.h"
#include "imap-utf7.h"
#include "imap-quote.h"
#include "imap-commands.h"
#include "mail-namespace.h"

struct namespace_order {
    int secondary_order;
    struct mail_namespace *ns;
};

static int namespace_order_cmp(const struct namespace_order *no1,
                   const struct namespace_order *no2)
{
    if (no1->ns->set->order < no2->ns->set->order)
        return -1;
    if (no1->ns->set->order > no2->ns->set->order)
        return 1;

    if (no1->secondary_order < no2->secondary_order)
        return -1;
    if (no1->secondary_order > no2->secondary_order)
        return 1;
    return 0;
}

static void list_namespaces(struct mail_namespace *ns,
                enum mail_namespace_type type, string_t *str)
{
    ARRAY(struct namespace_order) ns_order;
    struct namespace_order *no;
    unsigned int count = 0;
    string_t *mutf7_prefix;
    char ns_sep;

    t_array_init(&ns_order, 4);

    while (ns != NULL) {
        if (ns->type == type &&
            (ns->flags & NAMESPACE_FLAG_HIDDEN) == 0) {
            no = array_append_space(&ns_order);
            no->ns = ns;
            no->secondary_order = ++count;
        }
        ns = ns->next;
    }

    if (array_count(&ns_order) == 0) {
        str_append(str, "NIL");
        return;
    }
    array_sort(&ns_order, namespace_order_cmp);

    mutf7_prefix = t_str_new(64);
    str_append_c(str, '(');
    array_foreach_modifiable(&ns_order, no) {
        ns_sep = mail_namespace_get_sep(no->ns);
        str_append_c(str, '(');

        str_truncate(mutf7_prefix, 0);
        if (imap_utf8_to_utf7(no->ns->prefix, mutf7_prefix) < 0) {
            i_panic("LIST: Namespace prefix not UTF-8: %s",
                no->ns->prefix);
        }

        imap_append_string(str, str_c(mutf7_prefix));
        str_append(str, " \"");
        if (ns_sep == '\\')
            str_append_c(str, '\\');
        str_append_c(str, ns_sep);
        str_append(str, "\")");
    }
    str_append_c(str, ')');
}

bool cmd_namespace(struct client_command_context *cmd)
{
    struct client *client = cmd->client;
    string_t *str;

    str = t_str_new(256);
    str_append(str, "* NAMESPACE ");

    list_namespaces(client->user->namespaces,
            MAIL_NAMESPACE_TYPE_PRIVATE, str);
    str_append_c(str, ' ');
    list_namespaces(client->user->namespaces,
            MAIL_NAMESPACE_TYPE_SHARED, str);
    str_append_c(str, ' ');
    list_namespaces(client->user->namespaces,
            MAIL_NAMESPACE_TYPE_PUBLIC, str);

    client_send_line(client, str_c(str));
    client_send_tagline(cmd, "OK Namespace completed.");
    return TRUE;
}