src/imap/imap-sync.c

	imap-sync.c revision b2c1349cf07410aefab0f5b17153af9e5cfcf48f
/* Copyright (C) 2002-2004 Timo Sirainen */

#include "common.h"
#include "str.h"
#include "imap-util.h"
#include "mail-storage.h"
#include "imap-sync.h"
#include "commands.h"

struct cmd_sync_context {
    const char *tagline;
    struct imap_sync_context *sync_ctx;
};

struct imap_sync_context {
    struct client *client;
    struct mailbox *box;

    struct mailbox_transaction_context *t;
    struct mailbox_sync_context *sync_ctx;

    struct mailbox_sync_rec sync_rec;
    uint32_t seq;

    unsigned int messages_count;

    int failed;
};

struct imap_sync_context *
imap_sync_init(struct client *client, struct mailbox *box,
           enum mailbox_sync_flags flags)
{
    struct imap_sync_context *ctx;

    i_assert(client->mailbox == box);

    ctx = i_new(struct imap_sync_context, 1);
    ctx->client = client;
    ctx->box = box;

    ctx->t = mailbox_transaction_begin(box, FALSE);
    ctx->sync_ctx = mailbox_sync_init(box, flags);
    ctx->messages_count = client->messages_count;
    return ctx;
}

int imap_sync_deinit(struct imap_sync_context *ctx)
{
    struct mailbox_status status;

    if (mailbox_sync_deinit(ctx->sync_ctx, &status) < 0 || ctx->failed) {
        mailbox_transaction_rollback(ctx->t);
        i_free(ctx);
        return -1;
    }

    mailbox_transaction_commit(ctx->t, 0);

    t_push();

    ctx->client->messages_count = status.messages;
    if (status.messages != ctx->messages_count) {
        client_send_line(ctx->client,
            t_strdup_printf("* %u EXISTS", status.messages));
    }
    if (status.recent != ctx->client->recent_count) {
                ctx->client->recent_count = status.recent;
        client_send_line(ctx->client,
            t_strdup_printf("* %u RECENT", status.recent));
    }

    /*FIXME:client_save_keywords(&client->keywords, keywords, keywords_count);
    client_send_mailbox_flags(client, mailbox, keywords, keywords_count);*/

    t_pop();
    i_free(ctx);
    return 0;
}

int imap_sync_more(struct imap_sync_context *ctx)
{
    struct mail *mail;
        const struct mail_full_flags *mail_flags;
    string_t *str;

    t_push();
    str = t_str_new(256);

    for (;;) {
        if (ctx->seq == 0) {
            /* get next one */
            if (mailbox_sync_next(ctx->sync_ctx,
                          &ctx->sync_rec) <= 0)
                break;
        }

        switch (ctx->sync_rec.type) {
        case MAILBOX_SYNC_TYPE_FLAGS:
            if (ctx->seq == 0)
                ctx->seq = ctx->sync_rec.seq1;

            for (; ctx->seq <= ctx->sync_rec.seq2; ctx->seq++) {
                mail = mailbox_fetch(ctx->t, ctx->seq,
                             MAIL_FETCH_FLAGS);

                mail_flags = mail->get_flags(mail);
                if (mail_flags == NULL)
                    continue;

                str_truncate(str, 0);
                str_printfa(str, "* %u FETCH (FLAGS (",
                        ctx->seq);
                imap_write_flags(str, mail_flags);
                str_append(str, "))");
                if (!client_send_line(ctx->client,
                              str_c(str))) {
                    t_pop();
                    return 0;
                }
            }
            break;
        case MAILBOX_SYNC_TYPE_EXPUNGE:
            if (ctx->seq == 0) {
                ctx->seq = ctx->sync_rec.seq2;
                ctx->messages_count -=
                    ctx->sync_rec.seq2 -
                    ctx->sync_rec.seq1 + 1;
            }
            for (; ctx->seq >= ctx->sync_rec.seq1; ctx->seq--) {
                str_truncate(str, 0);
                str_printfa(str, "* %u EXPUNGE", ctx->seq);
                if (!client_send_line(ctx->client,
                              str_c(str))) {
                    t_pop();
                    return 0;
                }
            }
            break;
        }
        ctx->seq = 0;
    }
    t_pop();
    return 1;
}

int imap_sync_nonselected(struct mailbox *box, enum mailbox_sync_flags flags)
{
    struct mailbox_sync_context *ctx;
        struct mailbox_sync_rec sync_rec;
    struct mailbox_status status;

    ctx = mailbox_sync_init(box, flags);
    while (mailbox_sync_next(ctx, &sync_rec) > 0)
        ;
    return mailbox_sync_deinit(ctx, &status);
}

static int cmd_sync_continue(struct client *client)
{
    struct cmd_sync_context *ctx = client->cmd_context;

    if (imap_sync_more(ctx->sync_ctx) == 0)
        return FALSE;

    if (imap_sync_deinit(ctx->sync_ctx) < 0) {
        client_send_untagged_storage_error(client,
            mailbox_get_storage(client->mailbox));
    }

    client_send_tagline(client, ctx->tagline);
    return TRUE;
}

int cmd_sync(struct client *client, enum mailbox_sync_flags flags,
         const char *tagline)
{
        struct cmd_sync_context *ctx;

    if (client->mailbox == NULL) {
        client_send_tagline(client, tagline);
        return TRUE;
    }

    ctx = p_new(client->cmd_pool, struct cmd_sync_context, 1);
    ctx->tagline = p_strdup(client->cmd_pool, tagline);
    ctx->sync_ctx = imap_sync_init(client, client->mailbox, flags);

    client->cmd_func = cmd_sync_continue;
    client->cmd_context = ctx;
    client->command_pending = TRUE;
    return cmd_sync_continue(client);
}