src/doveadm/doveadm-mail-expunge.c

	doveadm-mail-expunge.c revision 6971937a6f3e93844dbd43bdbe903628e21a9422
/* Copyright (c) 2010-2015 Dovecot authors, see the included COPYING file */

#include "lib.h"
#include "array.h"
#include "mail-index.h"
#include "mail-storage.h"
#include "mail-search.h"
#include "doveadm-mailbox-list-iter.h"
#include "doveadm-mail-iter.h"
#include "doveadm-mail.h"

struct expunge_cmd_context {
    struct doveadm_mail_cmd_context ctx;
    bool delete_empty_mailbox;
};

static int
cmd_expunge_box(struct doveadm_mail_cmd_context *_ctx,
        const struct mailbox_info *info,
        struct mail_search_args *search_args)
{
    struct expunge_cmd_context *ctx = (struct expunge_cmd_context *)_ctx;
    struct doveadm_mail_iter *iter;
    struct mailbox *box;
    struct mail *mail;
    enum mail_error error;
    int ret = 0;

    if (doveadm_mail_iter_init(_ctx, info, search_args, 0, NULL,
                   &iter) < 0)
        return -1;

    while (doveadm_mail_iter_next(iter, &mail)) {
        if (doveadm_debug) {
            i_debug("expunge: box=%s uid=%u",
                info->vname, mail->uid);
        }
        mail_expunge(mail);
    }

    if (doveadm_mail_iter_deinit_keep_box(&iter, &box) < 0)
        ret = -1;
    else if (mailbox_sync(box, 0) < 0) {
        i_error("Syncing mailbox '%s' failed: %s",
            mailbox_get_vname(box),
            mailbox_get_last_error(box, NULL));
        doveadm_mail_failed_mailbox(_ctx, box);
        ret = -1;
    }

    if (ctx->delete_empty_mailbox && ret == 0) {
        if (mailbox_delete_empty(box) < 0) {
            error = mailbox_get_last_mail_error(box);
            if (error != MAIL_ERROR_EXISTS) {
                i_error("Deleting mailbox '%s' failed: %s",
                    mailbox_get_vname(box),
                    mailbox_get_last_error(box, NULL));
                doveadm_mail_failed_mailbox(_ctx, box);
                ret = -1;
            }
        } else {
            if (mailbox_set_subscribed(box, FALSE) < 0) {
                i_error("Unsubscribing mailbox '%s' failed: %s",
                    mailbox_get_vname(box),
                    mailbox_get_last_error(box, NULL));
                doveadm_mail_failed_mailbox(_ctx, box);
                ret = -1;
            }
        }
    }
    mailbox_free(&box);
    return ret;
}

static bool
expunge_search_args_is_mailbox_ok(struct mail_search_arg *args);

static bool
expunge_search_args_is_mailbox_or_ok(struct mail_search_arg *args)
{
    struct mail_search_arg *arg;

    for (arg = args; arg != NULL; arg = arg->next) {
        switch (arg->type) {
        case SEARCH_OR:
            if (!expunge_search_args_is_mailbox_or_ok(arg->value.subargs))
                return FALSE;
            break;
        case SEARCH_SUB:
        case SEARCH_INTHREAD:
            if (!expunge_search_args_is_mailbox_ok(arg->value.subargs))
                return FALSE;
            break;
        case SEARCH_MAILBOX:
        case SEARCH_MAILBOX_GUID:
        case SEARCH_MAILBOX_GLOB:
            break;
        default:
            return FALSE;
        }
    }
    return TRUE;
}

static bool
expunge_search_args_is_mailbox_ok(struct mail_search_arg *args)
{
    struct mail_search_arg *arg;
    bool have_or = FALSE;

    /* a) we find one mailbox here in the SUB block */
    for (arg = args; arg != NULL; arg = arg->next) {
        switch (arg->type) {
        case SEARCH_MAILBOX:
        case SEARCH_MAILBOX_GUID:
        case SEARCH_MAILBOX_GLOB:
            return TRUE;
        case SEARCH_OR:
            have_or = TRUE;
            break;
        case SEARCH_SUB:
        case SEARCH_INTHREAD:
            if (expunge_search_args_is_mailbox_ok(arg->value.subargs))
                return TRUE;
            break;
        default:
            break;
        }
    }

    /* b) there is at least one OR block, and all of the ORs must have
       mailbox */
    if (!have_or)
        return FALSE;

    for (arg = args; arg != NULL; arg = arg->next) {
        if (arg->type == SEARCH_OR &&
            !expunge_search_args_is_mailbox_or_ok(arg->value.subargs))
            return FALSE;
    }
    return TRUE;
}

static bool
expunge_search_args_is_msgset_ok(struct mail_search_arg *args);

static bool
expunge_search_args_is_msgset_or_ok(struct mail_search_arg *args)
{
    struct mail_search_arg *arg;

    /* we're done if all OR branches contain something else besides
       MAILBOXes */
    for (arg = args; arg != NULL; arg = arg->next) {
        switch (arg->type) {
        case SEARCH_MAILBOX:
        case SEARCH_MAILBOX_GUID:
        case SEARCH_MAILBOX_GLOB:
            return FALSE;
        case SEARCH_OR:
            if (!expunge_search_args_is_msgset_or_ok(arg->value.subargs))
                return FALSE;
            break;
        case SEARCH_SUB:
            if (!expunge_search_args_is_msgset_ok(arg->value.subargs))
                return FALSE;
            break;
        default:
            break;
        }
    }
    return TRUE;
}

static bool
expunge_search_args_is_msgset_ok(struct mail_search_arg *args)
{
    struct mail_search_arg *arg;

    /* all args can't be just MAILBOXes */
    for (arg = args; arg != NULL; arg = arg->next) {
        switch (arg->type) {
        case SEARCH_MAILBOX:
        case SEARCH_MAILBOX_GUID:
        case SEARCH_MAILBOX_GLOB:
            break;
        case SEARCH_OR:
            /* if each OR branch has something else than just
               MAILBOXes, we're ok */
            if (expunge_search_args_is_msgset_or_ok(arg->value.subargs))
                return TRUE;
            break;
        case SEARCH_SUB:
            if (expunge_search_args_is_msgset_ok(arg->value.subargs))
                return TRUE;
            break;
        default:
            return TRUE;
        }
    }
    return FALSE;
}

static int
cmd_expunge_run(struct doveadm_mail_cmd_context *ctx, struct mail_user *user)
{
    const enum mailbox_list_iter_flags iter_flags =
        MAILBOX_LIST_ITER_NO_AUTO_BOXES |
        MAILBOX_LIST_ITER_RETURN_NO_FLAGS;
    struct doveadm_mailbox_list_iter *iter;
    const struct mailbox_info *info;
    int ret = 0;

    iter = doveadm_mailbox_list_iter_init(ctx, user, ctx->search_args,
                          iter_flags);
    while ((info = doveadm_mailbox_list_iter_next(iter)) != NULL) T_BEGIN {
        if (cmd_expunge_box(ctx, info, ctx->search_args) < 0)
            ret = -1;
    } T_END;
    if (doveadm_mailbox_list_iter_deinit(&iter) < 0)
        ret = -1;
    return ret;
}

void expunge_search_args_check(struct mail_search_args *args, const char *cmd)
{
    if (!expunge_search_args_is_mailbox_ok(args->args)) {
        i_fatal_status(EX_USAGE,
            "%s: To avoid accidents, search query "
            "must contain MAILBOX in all search branches", cmd);
    }
    if (!expunge_search_args_is_msgset_ok(args->args)) {
        i_fatal_status(EX_USAGE,
            "%s: To avoid accidents, each branch in search query "
            "must contain something else besides MAILBOX "
            "(e.g. just add \"all\" if you want everything)", cmd);
    }
    mail_search_args_simplify(args);
}

static void cmd_expunge_init(struct doveadm_mail_cmd_context *ctx,
                 const char *const args[])
{
    if (args[0] == NULL)
        doveadm_mail_help_name("expunge");

    ctx->search_args = doveadm_mail_build_search_args(args);
    expunge_search_args_check(ctx->search_args, "expunge");
}

static bool cmd_expunge_parse_arg(struct doveadm_mail_cmd_context *_ctx, int c)
{
    struct expunge_cmd_context *ctx = (struct expunge_cmd_context *)_ctx;

    switch (c) {
    case 'd':
        ctx->delete_empty_mailbox = TRUE;
        break;
    default:
        return FALSE;
    }
    return TRUE;
}

static struct doveadm_mail_cmd_context *cmd_expunge_alloc(void)
{
    struct expunge_cmd_context *ctx;

    ctx = doveadm_mail_cmd_alloc(struct expunge_cmd_context);
    ctx->ctx.getopt_args = "d";
    ctx->ctx.v.parse_arg = cmd_expunge_parse_arg;
    ctx->ctx.v.init = cmd_expunge_init;
    ctx->ctx.v.run = cmd_expunge_run;
    return &ctx->ctx;
}

struct doveadm_mail_cmd cmd_expunge = {
    cmd_expunge_alloc, "expunge", "[-d] <search query>"
};