MDL-59212 analytics: Move API uses out of analytics dir

Part of MDL-57791 epic.

lib/classes/analytics/time_splitting/single_range.php

@@ -0,0 +1,62 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle 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.
+//
+// Moodle 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 Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Single time splitting method.
+ *
+ * @package   core
+ * @copyright 2016 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\analytics\time_splitting;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Single time splitting method.
+ *
+ * @package   core
+ * @copyright 2016 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class single_range extends \core_analytics\local\time_splitting\base {
+
+    /**
+     * get_name
+     *
+     * @return string
+     */
+    public function get_name() {
+        return get_string('timesplitting:singlerange');
+    }
+
+    /**
+     * One single range covering all analysable duration.
+     *
+     * @return array
+     */
+    protected function define_ranges() {
+        // Key 'time' == 0 because we want it to start predicting from the beginning.
+        return [
+            [
+                'start' => $this->analysable->get_start(),
+                'end' => $this->analysable->get_end(),
+                'time' => 0
+            ]
+        ];
+    }
+}