- possible to read and write user Variables in Codeigniter

- added Variablenname_model, VariableLib, Variables controller - Infocenter Übersicht - infocenterData, infocenterFreigegebenData, infocenterReihungstestAbsolviertData: added possibility of toggle of infocenter_studiensemester variable, only prestudents of selected Studiensemester are shown
2026-07-20 00:12:15 +00:00 · 2019-09-06 17:33:56 +02:00
parent 36ff38b0ee
commit 67415a4707
13 changed files with 485 additions and 26 deletions
@@ -0,0 +1,131 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Class VariableLib
+ * Provides functionality for managing uservariables for currently logged in user.
+ * Preloads variables for a user, so variables can be retrieved from views without getting uid again.
+ */
+class VariableLib
+{
+	private $_variables; // Contains the retrieved variables
+
+	/**
+	 * VariableLib constructor.
+	 * Loads variable of logged in user.
+	 * @param $loggeduid
+	 */
+	public function __construct($loggeduid)
+	{
+		$this->_ci =& get_instance();
+
+		$this->_variables = null;
+
+		$this->_ci->load->model('system/Variable_model', 'VariableModel');
+		$this->_ci->load->model('organisation/studiensemester_model', 'StudiensemesterModel');
+
+		if (isset($loggeduid['uid']) && !isEmptyString($loggeduid['uid']))
+			$this->_setVariables($loggeduid['uid']);
+		else
+		{
+			show_error('uid of logged user not passed!');
+		}
+	}
+
+	/**
+	 * Gets an already loaded user variable by variable name.
+	 * @param $name
+	 * @return mixed|null
+	 */
+	public function getVar($name)
+	{
+		return isset($this->_variables[$name]) ? $this->_variables[$name] : null;
+	}
+
+	/**
+	 * Changes variables having Studiensemester as value. Sets variable value to next or previous Semester.
+	 * @param $uid variable is set for this user
+	 * @param $name variable name
+	 * @param $change if positive, variable value is set to next semester, negative - previous semester
+	 * @return array if change was successfull, uid and variable name. Infotext otherwise.
+	 */
+	public function changeStudiensemesterVar($uid, $name, $change)
+	{
+		$result = error('error when setting variable!');
+		$notchangedtext = "Studiensemester variable not changed.";
+
+		if (!isEmptyString($uid) && !isEmptyString($name) && is_numeric($change))
+		{
+			$change = (int) $change;
+			$varres = $this->_ci->VariableModel->getVariables($uid, array($name));
+
+			if (isSuccess($varres))
+			{
+				if (hasData($varres))
+				{
+					$currStudiensemester = getData($varres);
+
+					if ($change === 0)
+					{
+						$result = success($notchangedtext);
+					}
+					else
+					{
+						if ($change > 0)
+						{
+							$changedsem = $this->_ci->StudiensemesterModel->getNextFrom($currStudiensemester[$name]);
+						}
+						elseif ($change < 0)
+						{
+							$changedsem = $this->_ci->StudiensemesterModel->getPreviousFrom($currStudiensemester[$name]);
+						}
+
+						if (hasData($changedsem))
+						{
+							$changedsem = getData($changedsem);
+
+							$result = $this->_ci->VariableModel->setVariable($uid, $name, $changedsem[0]->studiensemester_kurzbz);
+							//update property
+							$this->_setVariable($uid, $name);
+						}
+						else
+						{
+							$result = success($notchangedtext);
+						}
+					}
+				}
+			}
+		}
+		return $result;
+	}
+
+	/**
+	 * "Refreshes" variable value with given name by retrieving current value from db and saving it.
+	 * @param $uid
+	 * @param $name
+	 */
+	private function _setVariable($uid, $name)
+	{
+		$variable = $this->_ci->VariableModel->getVariables($uid, array($name));
+
+		if (hasData($variable))
+		{
+			$variable = getData($variable);
+			$this->_variables[$name] = $variable[$name];
+		}
+	}
+
+	/**
+	 * "Refreshes" all variable values by retrieving current values from db and saving them.
+	 * @param $uid
+	 */
+	private function _setVariables($uid)
+	{
+		$variables = $this->_ci->VariableModel->getVariables($uid);
+		if (hasData($variables))
+		{
+			$this->_variables = getData($variables);
+		}
+	}
+}