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/*
* blogc: A blog compiler.
* Copyright (C) 2015 Rafael G. Martins <rafael@rafaelmartins.eng.br>
*
* This program can be distributed under the terms of the BSD License.
* See the file LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /* HAVE_CONFIG_H */
#include <stdio.h>
#include <string.h>
#include "utils/utils.h"
#include "datetime-parser.h"
#include "error.h"
#include "loader.h"
#include "source-parser.h"
#include "template-parser.h"
#include "renderer.h"
const char*
blogc_get_variable(const char *name, b_trie_t *global, b_trie_t *local)
{
const char *rv = NULL;
if (local != NULL) {
rv = b_trie_lookup(local, name);
if (rv != NULL)
return rv;
}
if (global != NULL)
rv = b_trie_lookup(global, name);
return rv;
}
char*
blogc_format_date(const char *date, b_trie_t *global, b_trie_t *local)
{
const char *date_format = blogc_get_variable("DATE_FORMAT", global, local);
if (date == NULL)
return NULL;
if (date_format == NULL)
return b_strdup(date);
blogc_error_t *err = NULL;
char *rv = blogc_convert_datetime(date, date_format, &err);
if (err != NULL) {
blogc_error_print(err);
blogc_error_free(err);
return b_strdup(date);
}
return rv;
}
char*
blogc_render(b_slist_t *tmpl, b_slist_t *sources, b_trie_t *config, bool listing)
{
if (tmpl == NULL)
return NULL;
b_slist_t *current_source = NULL;
b_slist_t *listing_start = NULL;
b_string_t *str = b_string_new();
b_trie_t *tmp_source = NULL;
const char *config_value = NULL;
const char *config_var = NULL;
char *config_value2 = NULL;
char *defined = NULL;
unsigned int if_count = 0;
unsigned int if_skip = 0;
bool if_not = false;
bool inside_block = false;
bool evaluate = false;
int cmp = 0;
b_slist_t *tmp = tmpl;
while (tmp != NULL) {
blogc_template_stmt_t *stmt = tmp->data;
switch (stmt->type) {
case BLOGC_TEMPLATE_CONTENT_STMT:
if (stmt->value != NULL)
b_string_append(str, stmt->value);
break;
case BLOGC_TEMPLATE_BLOCK_STMT:
inside_block = true;
if_count = 0;
if (0 == strcmp("entry", stmt->value)) {
if (listing) {
// we can just skip anything and walk until the next
// 'endblock'
while (stmt->type != BLOGC_TEMPLATE_ENDBLOCK_STMT) {
tmp = tmp->next;
stmt = tmp->data;
}
break;
}
current_source = sources;
tmp_source = current_source->data;
}
else if ((0 == strcmp("listing", stmt->value)) ||
(0 == strcmp("listing_once", stmt->value))) {
if (!listing) {
// we can just skip anything and walk until the next
// 'endblock'
while (stmt->type != BLOGC_TEMPLATE_ENDBLOCK_STMT) {
tmp = tmp->next;
stmt = tmp->data;
}
break;
}
}
if (0 == strcmp("listing", stmt->value)) {
if (sources == NULL) {
// we can just skip anything and walk until the next
// 'endblock'
while (stmt->type != BLOGC_TEMPLATE_ENDBLOCK_STMT) {
tmp = tmp->next;
stmt = tmp->data;
}
break;
}
if (current_source == NULL) {
listing_start = tmp;
current_source = sources;
}
tmp_source = current_source->data;
}
break;
case BLOGC_TEMPLATE_VARIABLE_STMT:
if (stmt->value != NULL) {
config_var = NULL;
if (0 == strcmp(stmt->value, "DATE_FORMATTED"))
config_var = "DATE";
else if (0 == strcmp(stmt->value, "DATE_FIRST_FORMATTED"))
config_var = "DATE_FIRST";
else if (0 == strcmp(stmt->value, "DATE_LAST_FORMATTED"))
config_var = "DATE_LAST";
if (config_var != NULL) {
config_value2 = blogc_format_date(
blogc_get_variable(config_var, config,
inside_block ? tmp_source : NULL),
config, inside_block ? tmp_source : NULL);
if (config_value2 != NULL) {
b_string_append(str, config_value2);
free(config_value2);
config_value2 = NULL;
break;
}
}
else {
config_value = blogc_get_variable(stmt->value, config,
inside_block ? tmp_source : NULL);
if (config_value != NULL)
b_string_append(str, config_value);
}
}
break;
case BLOGC_TEMPLATE_ENDBLOCK_STMT:
inside_block = false;
if (listing_start != NULL && current_source != NULL) {
current_source = current_source->next;
if (current_source != NULL) {
tmp = listing_start;
continue;
}
else
listing_start = NULL;
}
break;
case BLOGC_TEMPLATE_IFNDEF_STMT:
if_not = true;
case BLOGC_TEMPLATE_IF_STMT:
case BLOGC_TEMPLATE_IFDEF_STMT:
defined = NULL;
if (stmt->value != NULL) {
config_var = NULL;
if (0 == strcmp(stmt->value, "DATE_FORMATTED"))
config_var = "DATE";
else if (0 == strcmp(stmt->value, "DATE_FIRST_FORMATTED"))
config_var = "DATE_FIRST";
else if (0 == strcmp(stmt->value, "DATE_LAST_FORMATTED"))
config_var = "DATE_LAST";
if (config_var != NULL) {
config_value2 = blogc_format_date(
blogc_get_variable(config_var, config,
inside_block ? tmp_source : NULL),
config, inside_block ? tmp_source : NULL);
if (config_value2 != NULL) {
defined = config_value2;
config_value2 = NULL;
}
}
else
defined = b_strdup(blogc_get_variable(stmt->value,
config, inside_block ? tmp_source : NULL));
}
evaluate = false;
if (stmt->op != 0) {
// Strings that start with a '"' are actually strings, the
// others are meant to be looked up as a second variable
// check.
char *defined2 = NULL;
if (stmt->value2[0] != '"') {
defined2 =
b_strdup(blogc_get_variable(stmt->value2,
config,
inside_block ? tmp_source
: NULL)
);
} else {
defined2 = b_strndup(stmt->value2 + 1,
strlen(stmt->value2) - 2);
}
if (defined != NULL && defined2 != NULL) {
cmp = strcmp(defined, defined2);
if (cmp != 0 && stmt->op & BLOGC_TEMPLATE_OP_NEQ)
evaluate = true;
else if (cmp == 0 && stmt->op & BLOGC_TEMPLATE_OP_EQ)
evaluate = true;
else if (cmp < 0 && stmt->op & BLOGC_TEMPLATE_OP_LT)
evaluate = true;
else if (cmp > 0 && stmt->op & BLOGC_TEMPLATE_OP_GT)
evaluate = true;
}
free(defined2);
}
else {
if (if_not && defined == NULL)
evaluate = true;
if (!if_not && defined != NULL)
evaluate = true;
}
if (!evaluate) {
if_skip = if_count;
// at this point we can just skip anything, counting the
// number of 'if's, to know how many 'endif's we need to
// skip as well.
while (1) {
tmp = tmp->next;
stmt = tmp->data;
if ((stmt->type == BLOGC_TEMPLATE_IF_STMT) ||
(stmt->type == BLOGC_TEMPLATE_IFDEF_STMT) ||
(stmt->type == BLOGC_TEMPLATE_IFNDEF_STMT))
{
if_count++;
continue;
}
if (stmt->type == BLOGC_TEMPLATE_ENDIF_STMT) {
if (if_count > if_skip) {
if_count--;
continue;
}
if (if_count == if_skip)
break;
}
}
}
free(defined);
defined = NULL;
if_not = false;
break;
case BLOGC_TEMPLATE_ENDIF_STMT:
if_count--;
break;
}
tmp = tmp->next;
}
return b_string_free(str, false);
}
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