implement "if" statements with one boolean condition

src/chat.rs

@@ -679,7 +679,7 @@ pub fn handle_chat_events(
                 }
             }
             ChatEvent::GotoIf(condition, goto) => {
-                if condition != "" {
+                if vars.evaluate(condition, &chat.talker.actor_id) {
                     chat.position = goto.clone();
                 }
             }

src/chats/serenity.yaml

@@ -17,14 +17,13 @@
 
 
 - chat: Icarus
-- if: $talked_before
+- if: $met
   then:
   - Oh hey, you're back!
-  - Nice to see you again!
-  - goto: back
+  - How are you doing?
+  - goto: howru
 - Oh hey, you're awake!
-- set: $talked_before
-- label: back
+- set: $met
 - I found you drifting out cold, and thought, I better watch over you.
 - Took us here behind that moonlet, to shield you from the micros.
 - Thank you!:

src/var.rs

@@ -224,17 +224,15 @@ impl GameVars {
         return None;
     }
 
-    #[allow(dead_code)]
     pub fn getb(&self, key: &str) -> bool {
         if let Some(value) = self.db.get(key) {
-            return value != "0";
+            return Self::evaluate_str_as_bool(value);
         }
         return false;
     }
 
-    #[allow(dead_code)]
-    pub fn set(&mut self, key: &str, value: String) {
-        self.db.insert(key.to_lowercase(), value);
+    pub fn evaluate_str_as_bool(string: &str) -> bool {
+        return string != "0";
     }
 
     // This method ensures that the variable name contains a scope separator,
@@ -279,4 +277,21 @@ impl GameVars {
         let key = Self::normalize_varname(fallback_scope, key);
         self.db.insert(key, value);
     }
+
+    pub fn evaluate(&self, condition: &str, scope: &str) -> bool {
+        let parts: Vec<&str> = condition.split(" ").collect();
+        if parts.len() == 1 {
+            let part = parts[0];
+            if part.contains(SCOPE_SEPARATOR) {
+                let part = Self::normalize_varname(scope, part);
+                let value_bool = self.getb(part.as_str());
+                return value_bool;
+            }
+            else {
+                return Self::evaluate_str_as_bool(part);
+            }
+        } else {
+            return false;
+        }
+    }
 }