timing methods extracted to separate classes

js/intervals.js

@@ -0,0 +1,131 @@
+'use strict';
+
+var helper = helper || {};
+
+helper.interval = (function () {
+
+    var privateScope = {},
+        publicScope = {};
+
+    privateScope.intervals = [];
+
+    /**
+     *
+     * @param {String} name
+     * @param {Function} code function reference (code to be executed)
+     * @param {int} interval time interval in milliseconds
+     * @param {boolean} first true/false if code should be ran initially before next timer interval hits
+     * @returns {{name: *, timer: null, code: *, interval: *, fired: number, paused: boolean}}
+     */
+    publicScope.add = function (name, code, interval, first) {
+        var data = {
+            'name': name,
+            'timer': null,
+            'code': code,
+            'interval': interval,
+            'fired': 0,
+            'paused': false
+        };
+
+        if (first == true) {
+            code(); // execute code
+            data.fired++; // increment counter
+        }
+
+        data.timer = setInterval(function() {
+            code();
+            data.fired++;
+        }, interval);
+
+        privateScope.intervals.push(data);
+
+        return data;
+    };
+
+    /**
+     * Method removes and stop execution of interval callback
+     * @param {string} name
+     * @returns {boolean}
+     */
+    publicScope.remove = function (name) {
+        for (var i = 0; i < privateScope.intervals.length; i++) {
+            if (privateScope.intervals[i].name == name) {
+                clearInterval(privateScope.intervals[i].timer); // stop timer
+                privateScope.intervals.splice(i, 1);
+                return true;
+            }
+        }
+        return false;
+    };
+
+    /**
+     *
+     * @param {string} name
+     * @returns {boolean}
+     */
+    publicScope.pause = function (name) {
+        for (var i = 0; i < privateScope.intervals.length; i++) {
+            if (privateScope.intervals[i].name == name) {
+                clearInterval(privateScope.intervals[i].timer);
+                privateScope.intervals[i].paused = true;
+
+                return true;
+            }
+        }
+
+        return false;
+    };
+
+    /**
+     *
+     * @param {string} name
+     * @returns {boolean}
+     */
+    publicScope.resume = function (name) {
+        for (var i = 0; i < privateScope.intervals.length; i++) {
+            if (privateScope.intervals[i].name == name && privateScope.intervals[i].paused) {
+                var obj = privateScope.intervals[i];
+
+                obj.timer = setInterval(function() {
+                    obj.code(); // execute code
+                    obj.fired++; // increment counter
+                }, obj.interval);
+
+                obj.paused = false;
+                return true;
+            }
+        }
+
+        return false;
+    };
+
+    /**
+     *
+     * @param {=} keep_array
+     * @returns {number}
+     */
+    publicScope.killAll = function (keep_array) {
+        var timers_killed = 0;
+
+        for (var i = (privateScope.intervals.length - 1); i >= 0; i--) { // reverse iteration
+            var keep = false;
+            if (keep_array) { // only run through the array if it exists
+                keep_array.forEach(function (name) {
+                    if (privateScope.intervals[i].name == name) {
+                        keep = true;
+                    }
+                });
+            }
+
+            if (!keep) {
+                clearInterval(privateScope.intervals[i].timer); // stop timer
+                privateScope.intervals.splice(i, 1); // remove element/object from array
+                timers_killed++;
+            }
+        }
+
+        return timers_killed;
+    };
+
+    return publicScope;
+})();