init Timer

js/timer.js

@@ -0,0 +1,37 @@
+class Timer {
+    
+    /**
+     * Make a timer
+     * @param {int} time in seconds
+     * @throws TypeError if time is not a positive Integer  
+     */
+    constructor(time) {
+        if (!isValid(time)) throw new TypeError(`${time} n'est pas un entier valide`);
+        this.time = time;
+    }
+
+
+    /**
+     * Predicate that show if the value of the timer is correctly set
+     * @param {int} valueTest 
+     * @return True if the predicate is verified
+     *         False else
+     */
+    isValid(valueTest) {
+        return Number.isInteger(valueTest) && valueTest > 0
+    }
+
+    /**
+     * @return the current time
+     */
+    getTime() {
+        return this.time
+    }
+
+    /**
+     * Make start the timer
+     */
+    startTimer() {
+        setTimeout(this.time--, 1000)
+    }
+}