1 files changed, 80 insertions, 0 deletions
diff --git a/apps/files/src/services/Sidebar.js b/apps/files/src/services/Sidebar.js
new file mode 100644
index 00000000000..0f5c275e532
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+++ b/apps/files/src/services/Sidebar.js
@@ -0,0 +1,80 @@
+/**
+ * SPDX-FileCopyrightText: 2019 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+export default class Sidebar {
+
+	_state
+
+	constructor() {
+		// init empty state
+		this._state = {}
+
+		// init default values
+		this._state.tabs = []
+		this._state.views = []
+		this._state.file = ''
+		this._state.activeTab = ''
+		console.debug('OCA.Files.Sidebar initialized')
+	}
+
+	/**
+	 * Get the sidebar state
+	 *
+	 * @readonly
+	 * @memberof Sidebar
+	 * @return {object} the data state
+	 */
+	get state() {
+		return this._state
+	}
+
+	/**
+	 * Register a new tab view
+	 *
+	 * @memberof Sidebar
+	 * @param {object} tab a new unregistered tab
+	 * @return {boolean}
+	 */
+	registerTab(tab) {
+		const hasDuplicate = this._state.tabs.findIndex(check => check.id === tab.id) > -1
+		if (!hasDuplicate) {
+			this._state.tabs.push(tab)
+			return true
+		}
+		console.error(`An tab with the same id ${tab.id} already exists`, tab)
+		return false
+	}
+
+	registerSecondaryView(view) {
+		const hasDuplicate = this._state.views.findIndex(check => check.id === view.id) > -1
+		if (!hasDuplicate) {
+			this._state.views.push(view)
+			return true
+		}
+		console.error('A similar view already exists', view)
+		return false
+	}
+
+	/**
+	 * Return current opened file
+	 *
+	 * @memberof Sidebar
+	 * @return {string} the current opened file
+	 */
+	get file() {
+		return this._state.file
+	}
+
+	/**
+	 * Set the current visible sidebar tab
+	 *
+	 * @memberof Sidebar
+	 * @param {string} id the tab unique id
+	 */
+	setActiveTab(id) {
+		this._state.activeTab = id
+	}
+
+}