1: <?php
 2: class Settings_Model extends CI_Model {
 3:     /**
 4:      * Class Constructor
 5:      */
 6:     function __construct() {
 7:         parent::__construct();
 8:     }
 9:     
10:     /**
11:      * Get setting value from database.
12:      * 
13:      * This method returns a system setting from the 
14:      * database.
15:      * 
16:      * @expectedException Exception
17:      * 
18:      * @param string $name The database setting name.
19:      * @return string Returns the database value for 
20:      * the selected setting.
21:      */
22:     function get_setting($name) {
23:         if (!is_string($name)) { // Check argument type.
24:             throw new Exception('$name argument is not a string : ' . $name);
25:         }
26:         
27:         if ($this->db->get_where('ea_settings', array('name' => $name))->num_rows() == 0) { // Check if setting exists in db.
28:             throw new Exception('$name setting does not exist in database : ' . $name);
29:         }
30:         
31:         $query = $this->db->get_where('ea_settings', array('name' => $name));
32:         $setting = ($query->num_rows() > 0) ? $query->row() : '';
33:         return $setting->value;
34:     }
35:     
36:     /**
37:      * This method sets the value for a specific setting 
38:      * on the database. If the setting doesn't exist, it
39:      * is going to be created, otherwise updated.
40:      * 
41:      * @expectedException Exception
42:      * 
43:      * @param string $name The setting name.
44:      * @param type $value The setting value.
45:      * @return int Returns the setting database id.
46:      */
47:     function set_setting($name, $value) {
48:         if (!is_string($name)) {
49:             throw new Exception('$name argument is not a string : ' . $name);
50:         }            
51:         
52:         $query = $this->db->get_where('ea_settings', array('name' => $name));
53:         if ($query->num_rows() > 0) {
54:             // Update setting
55:             if (!$this->db->update('ea_settings', array('value' => $value), array('name' => $name))) {
56:                 throw new Exception('Could not update database setting.');
57:             }
58:             $setting_id = intval($this->db->get_where('ea_settings', array('name' => $name))->row()->id);
59:         } else {
60:             // Insert setting
61:             $insert_data = array(
62:                 'name'  => $name,
63:                 'value' => $value
64:             );
65:             if (!$this->db->insert('ea_settings', $insert_data)) {
66:                 throw new Exception('Could not insert database setting');
67:             }
68:             $setting_id = intval($this->db->insert_id());
69:         }
70:         
71:         return $setting_id;
72:     }
73:     
74:     /**
75:      * Remove a setting from the database.
76:      * 
77:      * @expectedException Exception 
78:      * 
79:      * @param string $name The setting name to be removed.
80:      * @return bool Returns the delete operation result.
81:      */
82:     function remove_setting($name) {
83:         if (!is_string($name)) {
84:             throw new Exception('$name is not a string : ' . $name);
85:         }
86:         
87:         if ($this->db->get_where('ea_settings', array('name' => $name))->num_rows() == 0) {
88:             return FALSE; // There is no such setting.
89:         }
90:         
91:         return $this->db->delete('ea_settings', array('name' => $name));
92:     }
93: }
94: 
95: /* End of file settings_model.php */
96: /* Location: ./application/models/settings_model.php */