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/*
* msg
* Copyright (C) 2025 Raghuram Subramani <raghus2247@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#define _GNU_SOURCE
#include <config.h>
#include <copy.h>
#include <engine.h>
#include <filehandler.h>
#include <lexer.h>
#include <list.h>
#include <msg.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <util.h>
extern msg_t *msg;
/*
* First reads the config, if present. Then streams each directive and parses
* it, modifying the buffer. At the end, all applicable directives in the
* buffer are parsed and evaluated.
*
* ENDEACHDO, BODY, CONTENT, _RAW, etc. are not applicable,
* for varying reasons. For example, ENDEACHDO isn't really meant to be parsed.
* It's only there to define the end of the EACHDO content block.
*/
engine_t *
engine_ingest(char **buffer, bool is_template)
{
engine_t *engine = malloc(sizeof(engine_t));
engine->config = NULL;
char *p = strstr(*buffer, "---");
if (p != NULL) {
char *config;
asprintf(&config, "%.*s\n", (int) (p - *buffer), *buffer);
engine->config = config_parse(config);
free(config);
char *tempbuffer = strdup(p);
free(*buffer);
asprintf(buffer, "%s", tempbuffer + strlen("---"));
free(tempbuffer);
}
key_match_t *match;
engine->content_headers = list_create(sizeof(contentfor_operand_t));
if (engine->content_headers == NULL) {
printf("Could not create content_headers\n");
return NULL;
}
size_t skip = 0;
while (true) {
match = find_next_key(*buffer, skip);
if (match == NULL)
break;
#ifdef DEBUG
printf("Match: %.*s LENGTH(%d) OFFSET(%d)\n",
match->length,
*buffer + match->offset,
match->length,
match->offset);
#endif
directive_t *directive = find_directive(*buffer, match);
if (directive == NULL) {
printf("Unknown directive: %.*s\n",
match->length,
*buffer + match->offset);
break;
}
switch (directive->type) {
case INCLUDE:
handle_include(buffer, match, directive);
break;
case CONTENTFOR:
handle_contentfor(
buffer, match, directive, engine->content_headers);
break;
case EACHDO: {
eachdo_operands_t *operands = directive->operands;
/* Don't handle page source only if a template is currently being
* parsed */
if (is_template && !strcmp(operands->source, "page"))
skip++;
else
handle_eachdo(buffer, match, directive, engine->config);
break;
}
/* TODO: handle */
default:
skip++;
break;
}
directive_delete(directive);
free(match);
}
return engine;
}
/*
* Frees the provided engine_t's children before freeing the structure itself.
*/
void
engine_delete(engine_t *engine)
{
if (engine->config != NULL)
config_delete(engine->config);
for (size_t i = 0; i < engine->content_headers->size; i++) {
contentfor_operand_t *operand = list_get(engine->content_headers, i);
free(operand->content);
free(operand->key);
}
list_delete(engine->content_headers);
free(engine);
}
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