/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/*  Monkey HTTP Server
 *  ==================
 *  Copyright 2001-2017 Eduardo Silva <eduardo@monkey.io>
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

/* dir_html.c */
#ifndef MK_DIRHTML_H
#define MK_DIRHTML_H

#include <dirent.h>
#include <limits.h>

#define MK_DIRHTML_URL "/_mktheme"
#define MK_DIRHTML_DEFAULT_MIME "Content-Type: text/html\r\n"

/* For every directory requested, don't send more than
 * this limit of entries.
 */
#define MK_DIRHTML_BUFFER_LIMIT 30
#define MK_DIRHTML_BUFFER_GROW 5

#define MK_HEADER_CHUNKED "Transfer-Encoding: Chunked\r\n\r\n"
#define MK_DIRHTML_FMOD_LEN 24

/* Theme files */
#define MK_DIRHTML_FILE_HEADER "header.theme"
#define MK_DIRHTML_FILE_ENTRY "entry.theme"
#define MK_DIRHTML_FILE_FOOTER "footer.theme"

#define MK_DIRHTML_TAG_INIT "%_"
#define MK_DIRHTML_TAG_END "_%"
#define MK_DIRHTML_SIZE_DIR "-"

/* Stream state */
#define MK_DIRHTML_STATE_HTTP_HEADER   0
#define MK_DIRHTML_STATE_TPL_HEADER    1
#define MK_DIRHTML_STATE_BODY          2
#define MK_DIRHTML_STATE_FOOTER        3

char *_tags_global[] = { "%_html_title_%",
                         "%_theme_path_%",
                         NULL
};

char *_tags_entry[] = { "%_target_title_%",
                        "%_target_url_%",
                        "%_target_name_%",
                        "%_target_time_%",
                        "%_target_size_%",
                        NULL
};

struct plugin_api *mk_api;

struct mk_f_list
{
    char ft_modif[MK_DIRHTML_FMOD_LEN];
    struct file_info info;
    char name[NAME_MAX + 1]; /* The name can be up to NAME_MAX long; include NULL. */
    char size[16];
    unsigned char type;

    struct mk_list _head;
};

/* Main configuration of dirhtml module */
struct dirhtml_config
{
    char *theme;
    char *theme_path;
};

/* Represent a request context */
struct mk_dirhtml_request
{
    /* State */
    int state;
    int chunked;

    /* Target directory */
    DIR *dir;

    /* Table of Content */
    unsigned int toc_idx;
    unsigned long toc_len;
    struct mk_f_list **toc;
    struct mk_list *file_list;

    /* Stream handler */
    struct mk_stream *stream;

    /* Reference IOV stuff */
    struct mk_iov *iov_header;
    struct mk_iov *iov_entry;
    struct mk_iov *iov_footer;

    /* Session data */
    struct mk_http_session *cs;
    struct mk_http_request *sr;
};


extern const mk_ptr_t mk_dirhtml_default_mime;
extern const mk_ptr_t mk_iov_dash;

/* Global config */
struct dirhtml_config *dirhtml_conf;

/* Used to keep splitted content of every template */
struct dirhtml_template
{
    char *buf;
    int tag_id;
    int len;
    struct dirhtml_template *next;
    char **tags;                /* array of theme tags: [%_xaa__%, %_xyz_%] */
};

/* Templates for header, entries and footer */
struct dirhtml_template *mk_dirhtml_tpl_header;
struct dirhtml_template *mk_dirhtml_tpl_entry;
struct dirhtml_template *mk_dirhtml_tpl_footer;

struct dirhtml_value
{
    int tag_id;
    mk_ptr_t sep;             /* separator code after value */

    /* string data */
    int len;
    char *value;

    /* next node */
    struct mk_list _head;

    char **tags;                /* array of tags which values correspond */
};

struct dirhtml_value *mk_dirhtml_value_global;

/* Configuration struct */
struct mk_config *conf;

char *check_string(char *str);
char *read_header_footer_file(char *file_path);

int mk_dirhtml_conf();
char *mk_dirhtml_load_file(char *filename);

struct dirhtml_template *mk_dirhtml_template_create(char *content);

struct dirhtml_template
    *mk_dirhtml_template_list_add(struct dirhtml_template **header,
                                  char *buf, int len, char **tpl, int tag);

int mk_dirhtml_read_config(char *path);
int mk_dirhtml_theme_load();
int mk_dirhtml_theme_debug(struct dirhtml_template **st_tpl);

struct dirhtml_value *mk_dirhtml_tag_assign(struct mk_list *list,
                                            int tag_id, mk_ptr_t sep,
                                            char *value, char **tags);

struct f_list *get_dir_content(struct mk_http_request *sr, char *path);


#endif