[rules] Rule Builder: Fix condition callback type def (#390)

Signed-off-by: Florian Hotze <[email protected]>

src/rules/trigger-builder.js

@@ -2,6 +2,11 @@ const triggers = require('../triggers');
 const operations = require('./operation-builder');
 const conditions = require('./condition-builder');
 
+/**
+ * @callback ConditionCallback The callback function to determine if the condition is met.
+ * @returns {boolean} true if the condition is met, otherwise false
+ */
+
 /**
  * Builder for rule Triggers
  *
@@ -150,7 +155,7 @@ class TriggerConf {
   /**
    * Move to the rule condition
    *
-   * @param {*} [fn] the optional function to execute
+   * @param {ConditionCallback} [fn] the optional function to execute
    * @returns {conditions.ConditionBuilder}
    */
   if (fn) {

types/rules/trigger-builder.d.ts

@@ -1,3 +1,7 @@
+/**
+ * The callback function to determine if the condition is met.
+ */
+export type ConditionCallback = () => boolean;
 /**
  * Cron based trigger
  *
@@ -227,6 +231,10 @@ export class SystemTriggerConfig extends TriggerConf {
     startLevel(level: number): SystemTriggerConfig;
     level: number;
 }
+/**
+ * @callback ConditionCallback The callback function to determine if the condition is met.
+ * @returns {boolean} true if the condition is met, otherwise false
+ */
 /**
  * Builder for rule Triggers
  *
@@ -326,10 +334,10 @@ declare class TriggerConf {
     /**
      * Move to the rule condition
      *
-     * @param {*} [fn] the optional function to execute
+     * @param {ConditionCallback} [fn] the optional function to execute
      * @returns {conditions.ConditionBuilder}
      */
-    if(fn?: any): conditions.ConditionBuilder;
+    if(fn?: ConditionCallback): conditions.ConditionBuilder;
 }
 /**
  * Time of day based trigger