/*
 * << Haru Free PDF Library 2.0.0 >> -- hpdf_info.c
 *
 * Copyright (c) 1999-2006 Takeshi Kanno <takeshi_kanno@est.hi-ho.ne.jp>
 *
 * Permission to use, copy, modify, distribute and sell this software
 * and its documentation for any purpose is hereby granted without fee,
 * provided that the above copyright notice appear in all copies and
 * that both that copyright notice and this permission notice appear
 * in supporting documentation.
 * It is provided "as is" without express or implied warranty.
 *
 */

#include "hpdf_conf.h"
#include "hpdf_utils.h"
#include "hpdf_info.h"

static const char  *HPDF_INFO_ATTR_NAMES[] = {
    "CreationDate",
    "ModDate",
    "Author",
    "Creator",
    "Producer",
    "Title",
    "Subject",
    "Keywords",
    NULL
};


static const char*
InfoTypeToName  (HPDF_InfoType  type);


/*---------------------------------------------------------------------------*/

static const char*
InfoTypeToName  (HPDF_InfoType  type)
{
    HPDF_UINT idx = (HPDF_UINT)type;

    return HPDF_INFO_ATTR_NAMES[idx];
}


HPDF_STATUS
HPDF_Info_SetInfoAttr (HPDF_Dict        info,
                       HPDF_InfoType    type,
                       const char  *value,
                       HPDF_Encoder     encoder)
{
    const char* name = InfoTypeToName (type);

    HPDF_PTRACE((" HPDF_Info_SetInfoAttr\n"));

    if (type <= HPDF_INFO_MOD_DATE)
        return HPDF_SetError (info->error, HPDF_INVALID_PARAMETER, 0);

    return HPDF_Dict_Add (info, name, HPDF_String_New (info->mmgr, value,
            encoder));
}


const char*
HPDF_Info_GetInfoAttr (HPDF_Dict      info,
                       HPDF_InfoType  type)
{
    const char* name = InfoTypeToName (type);
    HPDF_String s;

    HPDF_PTRACE((" HPDF_Info_GetInfoAttr\n"));

    if (!info)
        return NULL;

    s = HPDF_Dict_GetItem (info, name, HPDF_OCLASS_STRING);

    if (!s)
        return NULL;
    else
        return s->value;
}


HPDF_STATUS
HPDF_Info_SetInfoDateAttr (HPDF_Dict      info,
                           HPDF_InfoType  type,
                           HPDF_Date      value)
{
    char tmp[HPDF_DATE_TIME_STR_LEN + 1];
    char* ptmp;
    const char* name = InfoTypeToName (type);

    HPDF_PTRACE((" HPDF_Info_SetInfoDateAttr\n"));

    if (type > HPDF_INFO_MOD_DATE)
        return HPDF_SetError (info->error, HPDF_INVALID_PARAMETER, 0);

    HPDF_MemSet (tmp, 0, HPDF_DATE_TIME_STR_LEN + 1);
    if (value.month < 1 || 12 < value.month ||
        value.day < 1 ||
        23 < value.hour ||
        59 < value.minutes ||
        59 < value.seconds ||
        (value.ind != '+' && value.ind != '-' && value.ind != 'Z' &&
                value.ind != ' ') ||
        23 < value.off_hour ||
        59 < value.off_minutes) {
        return HPDF_SetError (info->error, HPDF_INVALID_DATE_TIME, 0);
    }

    switch (value.month) {
        case 1:
        case 3:
        case 5:
        case 7:
        case 8:
        case 10:
        case 12:
            if (value.day > 31)
                return HPDF_SetError (info->error, HPDF_INVALID_DATE_TIME, 0);

            break;
        case 4:
        case 6:
        case 9:
        case 11:
            if (value.day > 30)
                return HPDF_SetError (info->error, HPDF_INVALID_DATE_TIME, 0);

            break;
        case 2:
            if (value.day > 29 || (value.day == 29 &&
                (value.year % 4 != 0 ||
                (value.year % 100 == 0 && value.year % 400 != 0))))
                return HPDF_SetError (info->error, HPDF_INVALID_DATE_TIME, 0);

            break;
        default:
            return HPDF_SetError (info->error, HPDF_INVALID_DATE_TIME, 0);
    }

    ptmp = HPDF_MemCpy (tmp, "D:", 2);
    ptmp = HPDF_IToA2 (ptmp, value.year, 5);
    ptmp = HPDF_IToA2 (ptmp, value.month, 3);
    ptmp = HPDF_IToA2 (ptmp, value.day, 3);
    ptmp = HPDF_IToA2 (ptmp, value.hour, 3);
    ptmp = HPDF_IToA2 (ptmp, value.minutes, 3);
    ptmp = HPDF_IToA2 (ptmp, value.seconds, 3);
    if (value.ind != ' ') {
        *ptmp++ = value.ind;
        ptmp = HPDF_IToA2 (ptmp, value.off_hour, 3);
        *ptmp++ = '\'';
        ptmp = HPDF_IToA2 (ptmp, value.off_minutes, 3);
        *ptmp++ = '\'';
    }
    *ptmp = 0;

    return HPDF_Dict_Add (info, name, HPDF_String_New (info->mmgr, tmp,
                NULL));
}