Major refactoring of UI code, small UI changes. (#48)

* Major refactoring of UI code, small UI changes.

* Single file index.js split up into separate modules
* Modules for handling UI view components
* Modules for handling JSON/Model data
* Modules for support tasks
* Module to encapsulate Moonfire API
* Main application module
* index.js simplified to just activating main app
* Settings file functionality expanded
* UI adds "Time Format" popup to allow changing time representation
* CSS changes/additions to streamline looks
* Recordings loading indicator only appears after 500ms delay, if at all

* Address first set of PR change requests from Scott.

* Add copyright headers to all files (except JSON files)
* Fix bug with entering time values in range pickers
* Fixed an erroneous comment and/or spelling error here and there
* Fixed JSDoc comments where [description] was not filled in
* Removed a TODO from NVRApplication as it no longer applies
* Fixed bug handling "infinite" case of video segment lengths
* Fixed bug in "trim" handler and trim execution

* Retrofit video continues loading from separate PR

Signed-off-by: Dolf Starreveld <dolf@starreveld.com>

* Address PR comments

Signed-off-by: Dolf Starreveld <dolf@starreveld.com>

* Address PR comments

Signed-off-by: Dolf Starreveld <dolf@starreveld.com>

ui-src/lib/models/Range.js

@@ -0,0 +1,73 @@
+// vim: set et sw=2 ts=2:
+//
+// This file is part of Moonfire NVR, a security camera digital video recorder.
+// Copyright (C) 2018 Dolf Starreveld <dolf@starreveld.com>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// In addition, as a special exception, the copyright holders give
+// permission to link the code of portions of this program with the
+// OpenSSL library under certain conditions as described in each
+// individual source file, and distribute linked combinations including
+// the two.
+//
+// You must obey the GNU General Public License in all respects for all
+// of the code used other than OpenSSL. If you modify file(s) with this
+// exception, you may extend this exception to your version of the
+// file(s), but you are not obligated to do so. If you do not wish to do
+// so, delete this exception statement from your version. If you delete
+// this exception statement from all source files in the program, then
+// also delete it here.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Class to represent ranges of values.
+ *
+ * The range has a "low", and "high" value property and is inclusive.
+ * The "size" property returns the difference between high and low.
+ */
+export default class Range {
+  /**
+   * Create a range.
+   *
+   * @param  {Number} low  Low value (inclusive) in range.
+   * @param  {Number} high High value (inclusive) in range.
+   */
+  constructor(low, high) {
+    if (high < low) {
+      console.log('Warning range swap: ' + low + ' - ' + high);
+      [low, high] = [high, low];
+    }
+    this.low = low;
+    this.high = high;
+  }
+
+  /**
+   * Size of the range.
+   *
+   * @return {Number} high - low
+   */
+  get size() {
+    return this.high - this.low;
+  }
+
+  /**
+   * Determine if value is inside the range.
+   *
+   * @param  {Number}  value Value to test
+   * @return {Boolean}
+   */
+  isInRange(value) {
+    return value >= this.low && value <= this.high;
+  }
+}