/* search_sort.h --  Sort criteria definition for search
 *
 * Copyright (c) 1994-2020 Carnegie Mellon University.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
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 *    endorse or promote products derived from this software without
 *    prior written permission. For permission or any legal
 *    details, please contact
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 * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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#ifndef __CYRUS_SEARCH_SORT_H__
#define __CYRUS_SEARCH_SORT_H__

/* Sort criterion */
struct sortcrit {
    unsigned key;               /* sort key */
    int flags;                  /* key modifiers as defined below */
    union {                     /* argument(s) to the sort key */
        struct {
            char *entry;
            char *userid;
        } annot;
        struct {
            char *name;
        } flag;
        struct {
            char *id;
        } mailbox;
    } args;
};

/* Values for sort keys */
enum {
    SORT_SEQUENCE = 0,
    SORT_ARRIVAL,       /* RFC 5256 */
    SORT_CC,            /* RFC 5256 */
    SORT_DATE,          /* RFC 5256 */
    SORT_DISPLAYFROM,   /* RFC 5957 */
    SORT_DISPLAYTO,     /* RFC 5957 */
    SORT_FROM,          /* RFC 5256 */
    SORT_SIZE,          /* RFC 5256 */
    SORT_SUBJECT,       /* RFC 5256 */
    SORT_TO,            /* RFC 5256 */
    SORT_ANNOTATION,    /* RFC 5257 */
    SORT_MODSEQ,        /* nonstandard */
    SORT_UID,           /* nonstandard */
    SORT_HASFLAG,       /* nonstandard */
    SORT_CONVMODSEQ,    /* nonstandard */
    SORT_CONVEXISTS,    /* nonstandard */
    SORT_CONVSIZE,      /* nonstandard */
    SORT_HASCONVFLAG,   /* nonstandard */
    SORT_FOLDER,        /* nonstandard */
    SORT_RELEVANCY,     /* RFC 6203 */
    SORT_SPAMSCORE,     /* nonstandard */
    SORT_GUID,          /* nonstandard */
    SORT_EMAILID,       /* nonstandard */
    SORT_THREADID,      /* nonstandard */
    SORT_SAVEDATE,      /* nonstandard */
    SORT_SNOOZEDUNTIL,  /* nonstandard */
    SORT_CREATEDMODSEQ, /* nonstandard */
    /* values > 255 are reserved for internal use */
};

/* Sort key modifier flag bits */
#define SORT_REVERSE            (1<<0)      /* RFC 5256 */


#endif /* __CYRUS_SEARCH_SORT_H__ */