add toggle method to Addon manager; start adding argument to optionally stop event emission

src/core/managers/Addon.js

@@ -387,11 +387,49 @@ export default class AddonManager extends Events {
     return this._log(`All ${toPlural(this.type)} have been unloaded!`);
   }
 
+  /**
+   * Toggles an addon with a given ID.
+   * @param {string} addonId Addon ID
+   */
+     async toggle (addonId, sendEvent = true) {
+      try {
+        const addon = this.get(addonId);
+
+        /**
+         * Make sure the addon is installed.
+         */
+        if (!addon) {
+          throw new Error(`Tried to toggle a non-installed ${this.type}: "${addonId}"!`);
+        }
+  
+        /**
+         * Toggle the addon.
+         */
+        let enabled;
+        if (this.isEnabled(addonId)) {
+          await this.disable(addonId, false);
+          enabled = false;
+        } else if (this.isDisabled(addonId, false)) {
+          await this.enable(addonId);
+          enabled = true;
+        }
+
+      /**
+       * Check if we should send the event.
+       */
+       if (sendEvent) {
+        this.emit(_Events.VIZALITY_ADDON_TOGGLE, { addonId, type: this.type, enabled  });
+       }
+      } catch (err) {
+        return this._error(err);
+      }
+    }
+
   /**
    * Enables an addon with a given ID.
    * @param {string} addonId Addon ID
    */
-  async enable (addonId) {
+  async enable (addonId, sendEvent = true) {
     try {
       const addon = this.get(addonId);
 
@@ -408,7 +446,13 @@ export default class AddonManager extends Events {
           .filter(addon => addon !== addonId));
 
       await addon._load(true);
-      this.emit(_Events.VIZALITY_ADDON_ENABLE, { addonId, type: this.type });
+
+      /**
+       * Check if we should send the event.
+       */
+      if (sendEvent) {
+        this.emit(_Events.VIZALITY_ADDON_ENABLE, { addonId, type: this.type });
+      }
     } catch (err) {
       return this._error(err);
     }

src/core/modules/constants/index.js

@@ -93,6 +93,7 @@ export const Events = Object.freeze({
   VIZALITY_ADDON_INSTALL: 'VIZALITY_ADDON_INSTALL',
   VIZALITY_ADDON_ENABLE: 'VIZALITY_ADDON_ENABLE',
   VIZALITY_ADDON_DISABLE: 'VIZALITY_ADDON_DISABLE',
+  VIZALITY_ADDON_TOGGLE: 'VIZALITY_ADDON_TOGGLE',
   VIZALITY_ADDONS_READY: 'VIZALITY_ADDONS_READY',
 
   /**