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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 <engine.h>
#include <filehandler.h>
#include <msg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <util.h>
extern msg_t *msg;
/*
* A generic function that accepts keys, corresponding values and the
* directives. It appends to the buffer the corresponding value of the key for
* each PUT in the directives.
*
* NOTE: The keys and values must be wrapped.
*
* content: A pointer to the buffer that is appended to
* directives: A list of the EACHDO directives (only _RAW and PUT)
* keys, values: A hash of PUT keys and their corresponding values
*/
static void
write_eachdo_iteration(char **content,
list_t *directives,
list_t *keys,
list_t *values)
{
for (size_t i = 0; i < directives->size; i++) {
directive_t *_directive = list_get(directives, i);
switch (_directive->type) {
case _RAW: {
*content = realloc(*content,
strlen(*content) + strlen(_directive->operands) + 1);
strcat(*content, _directive->operands);
break;
}
case PUT: {
char *key = unwrap(list_find_corresponding_value_from_ptr_wrapper(
keys, values, trim(_directive->operands)));
if (key != NULL) {
*content = realloc(*content, strlen(*content) + strlen(key) + 1);
strcat(*content, key);
}
break;
}
default:
/* TODO: Handle this */
break;
}
}
}
/*
* Handles EACHDOs on files. Fetches each file from a given directory
* (operands->key) and parses each of its configs before handing off the
* config->keys and config->values to write_eachdo_iteration.
*
* operands: Operands to the EACHDO call
* directives: List of all directives (from lexing the EACHDO's content block)
* content: A pointer to the buffer that is appended to
*/
static void
handle_file_source(eachdo_operands_t *operands,
list_t *directives,
char **content)
{
char *path;
asprintf(&path, "%s/%s", msg->base_directory, trim(operands->key));
list_t *files = enumfilesindir(path);
free(path);
if (files == NULL) {
printf("Could not find key %s\n", trim(operands->key));
free(operands);
return;
}
for (size_t i = 0; i < files->size; i++) {
char *file_path = unwrap(list_get(files, i));
asprintf(&path,
"%s/%s/%s",
msg->base_directory,
trim(operands->key),
file_path);
int len = strlen(path);
char *comparable = &path[len - strlen("index.html")];
if (strcmp(comparable, "index.html") == 0) {
free(path);
free(file_path);
continue;
}
config_t *config = config_fetch_and_parse(path);
write_eachdo_iteration(content, directives, config->keys, config->values);
config_delete(config);
free(file_path);
free(path);
}
list_delete(files);
}
/*
* Handles EACHDO calls. Given a pointer to the buffer, it replaces the EACHDO
* call along with its content block and ENDEACHDO call with the fetched
* content.
*
* buffer: Pointer to the buffer that is modified
* match: Pointer to the key match
* directive: Pointer to the directive struct
*/
void
handle_eachdo(char **buffer, key_match_t *match, directive_t *directive)
{
eachdo_operands_t *operands = directive->operands;
engine_t *engine = engine_ingest(&operands->content);
engine_delete(engine);
list_t *directives = lex(operands->content);
char *content = calloc(1, sizeof(char));
handle_file_source(operands, directives, &content);
char *temp_buffer = strdup(*buffer);
free(*buffer);
asprintf(buffer,
"%.*s%s%s\n",
match->offset,
temp_buffer,
content,
temp_buffer + operands->length);
for (size_t i = 0; i < directives->size; i++) {
directive_t *_directive = list_get(directives, i);
free(_directive->operands);
}
list_delete(directives);
free(content);
free(temp_buffer);
}
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