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-rw-r--r--src/renderer.c145
1 files changed, 145 insertions, 0 deletions
diff --git a/src/renderer.c b/src/renderer.c
new file mode 100644
index 0000000..7d20b39
--- /dev/null
+++ b/src/renderer.c
@@ -0,0 +1,145 @@
+/*
+ * 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 COPYING.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <string.h>
+#include "utils/utils.h"
+#include "source-parser.h"
+#include "template-parser.h"
+#include "renderer.h"
+
+
+char*
+blogc_render(b_slist_t *tmpl, b_slist_t *sources)
+{
+ if (tmpl == NULL || sources == NULL)
+ return NULL;
+
+ bool single_source = sources->next == NULL;
+
+ b_slist_t *current_source = NULL;
+ b_slist_t *multiple_sources_start = NULL;
+
+ b_string_t *str = b_string_new();
+
+ blogc_source_t *tmp_source = NULL;
+ char *config_value = NULL;
+
+ unsigned int if_count = 0;
+ unsigned int if_skip = 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:
+ if_count = 0;
+ if (0 == strcmp("single_source", stmt->value)) {
+ if (!single_source) {
+
+ // 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("multiple_sources", stmt->value)) ||
+ (0 == strcmp("multiple_sources_once", stmt->value))) {
+ if (single_source) {
+
+ // 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("multiple_sources", stmt->value)) {
+ if (current_source == NULL) {
+ multiple_sources_start = tmp;
+ current_source = sources;
+ }
+ tmp_source = current_source->data;
+ }
+ break;
+
+ case BLOGC_TEMPLATE_VARIABLE_STMT:
+ if (stmt->value != NULL && tmp_source != NULL) {
+ config_value = b_trie_lookup(tmp_source->config, stmt->value);
+ if (config_value != NULL)
+ b_string_append(str, config_value);
+ break;
+ }
+ break;
+
+ case BLOGC_TEMPLATE_ENDBLOCK_STMT:
+ if (multiple_sources_start != NULL && current_source != NULL) {
+ current_source = current_source->next;
+ if (current_source != NULL) {
+ tmp = multiple_sources_start;
+ continue;
+ }
+ else
+ multiple_sources_start = NULL;
+ }
+ break;
+
+ case BLOGC_TEMPLATE_IF_STMT:
+ if (stmt->value != NULL && tmp_source != NULL) {
+ if (b_trie_lookup(tmp_source->config, stmt->value) == NULL) {
+ 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) {
+ if_count++;
+ continue;
+ }
+ if (stmt->type == BLOGC_TEMPLATE_ENDIF_STMT) {
+ if (if_count > if_skip) {
+ if_count--;
+ continue;
+ }
+ if (if_count == if_skip)
+ break;
+ }
+ }
+ }
+ }
+ break;
+
+ case BLOGC_TEMPLATE_ENDIF_STMT:
+ if_count--;
+ break;
+ }
+ tmp = tmp->next;
+ }
+
+ return b_string_free(str, false);
+}