1 files changed, 94 insertions, 0 deletions
diff --git a/library/Sortable/src/PluginManager.js b/library/Sortable/src/PluginManager.js
new file mode 100644
index 000000000..db0a0f238
--- /dev/null
+++ b/library/Sortable/src/PluginManager.js
@@ -0,0 +1,94 @@
+let plugins = [];
+
+const defaults = {
+	initializeByDefault: true
+};
+
+export default {
+	mount(plugin) {
+		// Set default static properties
+		for (let option in defaults) {
+			if (defaults.hasOwnProperty(option) && !(option in plugin)) {
+				plugin[option] = defaults[option];
+			}
+		}
+
+		plugins.forEach(p => {
+			if (p.pluginName === plugin.pluginName) {
+				throw (`Sortable: Cannot mount plugin ${ plugin.pluginName } more than once`);
+			}
+		});
+
+		plugins.push(plugin);
+	},
+	pluginEvent(eventName, sortable, evt) {
+		this.eventCanceled = false;
+		evt.cancel = () => {
+			this.eventCanceled = true;
+		};
+		const eventNameGlobal = eventName + 'Global';
+		plugins.forEach(plugin => {
+			if (!sortable[plugin.pluginName]) return;
+			// Fire global events if it exists in this sortable
+			if (
+				sortable[plugin.pluginName][eventNameGlobal]
+			) {
+				sortable[plugin.pluginName][eventNameGlobal]({ sortable, ...evt });
+			}
+
+			// Only fire plugin event if plugin is enabled in this sortable,
+			// and plugin has event defined
+			if (
+				sortable.options[plugin.pluginName] &&
+				sortable[plugin.pluginName][eventName]
+			) {
+				sortable[plugin.pluginName][eventName]({ sortable, ...evt });
+			}
+		});
+	},
+	initializePlugins(sortable, el, defaults, options) {
+		plugins.forEach(plugin => {
+			const pluginName = plugin.pluginName;
+			if (!sortable.options[pluginName] && !plugin.initializeByDefault) return;
+
+			let initialized = new plugin(sortable, el, sortable.options);
+			initialized.sortable = sortable;
+			initialized.options = sortable.options;
+			sortable[pluginName] = initialized;
+
+			// Add default options from plugin
+			Object.assign(defaults, initialized.defaults);
+		});
+
+		for (let option in sortable.options) {
+			if (!sortable.options.hasOwnProperty(option)) continue;
+			let modified = this.modifyOption(sortable, option, sortable.options[option]);
+			if (typeof(modified) !== 'undefined') {
+				sortable.options[option] = modified;
+			}
+		}
+	},
+	getEventProperties(name, sortable) {
+		let eventProperties = {};
+		plugins.forEach(plugin => {
+			if (typeof(plugin.eventProperties) !== 'function') return;
+			Object.assign(eventProperties, plugin.eventProperties.call(sortable[plugin.pluginName], name));
+		});
+
+		return eventProperties;
+	},
+	modifyOption(sortable, name, value) {
+		let modifiedValue;
+		plugins.forEach(plugin => {
+			// Plugin must exist on the Sortable
+			if (!sortable[plugin.pluginName]) return;
+
+			// If static option listener exists for this option, call in the context of the Sortable's instance of this plugin
+			if (plugin.optionListeners && typeof(plugin.optionListeners[name]) === 'function') {
+				modifiedValue = plugin.optionListeners[name].call(sortable[plugin.pluginName], value);
+			}
+		});
+
+		return modifiedValue;
+	}
+};