defined why2_yml_read

this definitely isn't code from chatgpt combined with my dumb-ass and some random stuff from stackoverflow, nah :))

src/chat/parser.c

@@ -15,3 +15,55 @@ 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 <https://www.gnu.org/licenses/>.
 */
+
+#include <stdio.h>
+#include <string.h>
+
+#include <why2/memory.h>
+#include <why2/misc.h>
+
+#include <yaml.h>
+
+char *why2_yml_read(char *path, char *key)
+{
+    FILE *file = fopen(path, "r");
+
+    yaml_parser_t parser;
+    yaml_token_t token;
+    int state = 0;  // 0: looking for key, 1: looking for value
+
+    if (!yaml_parser_initialize(&parser)) why2_die("Failed to initialize parser.");
+
+    yaml_parser_set_input_file(&parser, file);
+    char *value = NULL;
+
+    while (yaml_parser_scan(&parser, &token))
+    {
+        switch (token.type)
+        {
+            case YAML_SCALAR_TOKEN:
+                if (state == 0 && strcmp((char*) token.data.scalar.value, key) == 0)
+                {
+                    state = 1;
+                } else if (state == 1)
+                {
+                    value = why2_strdup((char*) token.data.scalar.value);
+                    state = 0;  // Reset state for the next key-value pair
+                }
+
+                break;
+
+            case YAML_STREAM_END_TOKEN:
+                goto skip;
+
+            default:
+                break;
+        }
+
+        yaml_token_delete(&token); //TODO: Possible memory leak (or maybe not i have no fucking idea)
+    }
+
+    skip:
+
+    return value;
+}