1 files changed, 112 insertions, 0 deletions
diff --git a/src/template.c b/src/template.c
new file mode 100644
index 0000000..5d400b9
--- /dev/null
+++ b/src/template.c
@@ -0,0 +1,112 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "vendor/mpc.h"
+#include "template.h"
+
+char *read_file(char *filename) {
+    char *input = malloc(BUFSIZ);
+    unsigned int size = 0;
+
+    FILE *f = fopen(filename, "r");
+    if (!f) {
+        printf("Could not open \"%s\" for reading", filename);
+        exit(1);
+    }
+
+    unsigned int read = 0;
+    while ( (read = fread(input, 1, BUFSIZ, f)) > 0) {
+        size += read;
+        input = realloc(input, size + BUFSIZ);
+    }
+
+    fclose(f);
+
+    input[size] = '\0';
+    return input;
+}
+
+int eval(char *dest, mpc_ast_t* t, struct hashmap *ctx) {
+    printf("%s: %s\n", t->tag, t->contents);
+
+    if (strstr(t->tag, "content|text")) {
+        strcat(dest, t->contents);
+        return 0;
+    }
+
+    if (strstr(t->tag, "content|var")) {
+        printf("Key: %s\n", t->contents);
+        char *value = hashmap_get(ctx, t->children[1]->contents);
+        if  (value == NULL) {
+            return 1;
+        }
+        strcat(dest, value);
+        return 0;
+    }
+
+    if (strstr(t->tag, "content|for")) {
+        char *tmp_key = t->children[2]->contents;
+        char *iterator_key = t->children[4]->contents;
+        // TODO: Make this dynamic
+        struct post **posts = hashmap_get(ctx, iterator_key);
+        for (int i=0; i < 2; i++) {
+            hashmap_insert(ctx, tmp_key, posts[i]);
+            eval(dest, t->children[6], ctx);
+        }
+        return 0;
+    }
+
+    for (int i=0; i < t->children_num; i++) {
+        eval(dest, t->children[i], ctx);
+    }
+    
+    return 0;
+}
+
+mpc_parser_t *parser_init() {
+    mpc_parser_t *Symbol = mpc_new("symbol");
+    mpc_parser_t *Text = mpc_new("text");
+    mpc_parser_t *Var_Open = mpc_new("var_open");
+    mpc_parser_t *Var_Close = mpc_new("var_close");
+    mpc_parser_t *Var = mpc_new("var");
+    mpc_parser_t *Block_Open = mpc_new("block_open");
+    mpc_parser_t *Block_Close = mpc_new("block_close");
+    mpc_parser_t *For = mpc_new("for");
+    mpc_parser_t *Content = mpc_new("content");
+    mpc_parser_t *Template = mpc_new("template");
+    mpca_lang(MPCA_LANG_WHITESPACE_SENSITIVE,
+    " symbol    : /[a-zA-Z._]+/ ;"
+    " var_open  : /\{{2} ?/ ;"
+    " var_close : / ?}{2}/ ;"
+    " var       : <var_open> <symbol> <var_close> ;"
+    " block_open: /\{\% ?/ ;"
+    " block_close: / ?\%}/ ;"
+    " for       : <block_open> \"for \" <symbol> \" in \" <symbol> <block_close> <content>* <block_open> \"endfor\" <block_close> ;"
+    " text      : /[^{][^{%]*/ ;"
+    " content   : <var> | <for> | <text>;"
+    " template  : /^/ <content>* /$/ ;",
+    Symbol, Var_Open, Var_Close, Var, Block_Open, Block_Close, For, Text, Content, Template, NULL);
+    return Template;
+}
+
+void template(char *tmpl, struct hashmap *ctx) {
+    mpc_parser_t *parser = parser_init();
+    mpc_result_t r;
+
+    if (mpc_parse("input", tmpl, parser, &r)) {
+        mpc_ast_print(r.output);
+        
+        // FIXME: Allocate precisely
+        char *output = malloc(strlen(tmpl) * 2);
+        output[0] = '\0';
+        eval(output, r.output, ctx);
+        printf("Template: \n%s", output);
+        
+        mpc_ast_delete(r.output);
+        free(output);
+    } else {
+        mpc_err_print(r.error);
+        mpc_err_delete(r.error);
+    }
+}
+