validate($service)) { throw new Exception('Service data are invalid.'); } if (!isset($service['id'])) { $service['id'] = $this->insert($service); } else { $this->update($service); } return intval($service['id']); } /** * Insert service record into database. * * @param array $service Contains the service record data. * @return int Returns the new service record id. */ public function insert($service) { if (!$this->db->insert('ea_services', $service)) { throw new Exception('Could not insert service record.'); } return intval($this->db->insert_id()); } /** * Update service record. * * @param array $service Contains the service data. The record id needs to be included in * the array. */ public function update($service) { $this->db->where('id', $service['id']); if (!$this->db->update('ea_services', $service)) { throw new Exception('Could not update service record'); } } /** * Checks whether an service record already exists in the database. * * @param array $service Contains the service data. Name, duration and price values * are mandatory in order to perform the checks. */ public function exists($service) { if (!isset($service['name']) || !isset($service['duration']) || !isset($service['price'])) { throw new Exception('Not all service fields are provided in order to check whether ' . 'a service record already exists: ' . print_r($service, TRUE)); } $num_rows = $this->db->get_where('ea_services', array( 'name' => $service['name'], 'duration' => $service['duration'], 'price' => $service['price'] ))->num_rows(); return ($num_rows > 0) ? TRUE : FALSE; } /** * Validate a service record data. * * @param array $service Contains the service data. * @return bool Returns the validation result. */ public function validate($service) { $this->load->helper('data_validation'); try { // If record id is provided we need to check whether the record exists // in the database. if (isset($service['id'])) { $num_rows = $this->db->get_where('ea_services', array('id' => $service['id'])) ->num_rows(); if ($num_rows == 0) { throw new Exception('Provided service id does not exist in the database.'); } } // Check if service category id is valid (only when present) if ($service['id_service_categories'] != NULL) { $num_rows = $this->db->get_where('ea_service_categories', array('id' => $service['id_service_categories']))->num_rows(); if ($num_rows == 0) { throw new Exception('Provided service category id does not exist in database.'); } } // Check for required fields if ($service['name'] == '') { throw new Exception('Not all required service fields where provided: ' . print_r($service, TRUE)); } // Duration must be numeric if ($service['duration'] !== NULL) { if (!is_numeric($service['duration'])) { throw new Exception('Service duration is not numeric.'); } } if ($service['price'] !== NULL) { if (!is_numeric($service['price'])) { throw new Exception('Service price is not numeric.'); } } return TRUE; } catch(Exception $exc) { return FALSE; } } /** * Get the record id of an existing record. * * NOTICE! The record must exist, otherwise an exeption will be raised. * * @param array $service Contains the service record data. Name, duration and price values * are mandatory for this method to complete. */ public function find_record_id($service) { if (!isset($service['name']) || !isset($service['duration']) || !isset($service['price'])) { throw new Exception('Not all required fields where provided in order to find the ' . 'service record id.'); } $result = $this->db->get_where('ea_services', array( 'name' => $service['name'], 'duration' => $service['duration'], 'price' => $service['price'] )); if ($result->num_rows() == 0) { throw new Exception('Cound not find service record id'); } return $result->row()->id; } /** * Delete a service record from database. * * @param numeric $service_id Record id to be deleted. * @return bool Returns the delete operation result. */ public function delete($service_id) { if (!is_numeric($service_id)) { throw new Exception('Invalid argument type $service_id (value:"' . $service_id . '"'); } $num_rows = $this->db->get_where('ea_services', array('id' => $service_id))->num_rows(); if ($num_rows == 0) { return FALSE; // Record does not exist } return $this->db->delete('ea_services', array('id' => $service_id)); } /** * Get a specific row from the services db table. * * @param numeric $service_id The record's id to be returned. * @return array Returns an associative array with the selected * record's data. Each key has the same name as the database * field names. */ public function get_row($service_id) { if (!is_numeric($service_id)) { throw new Exception('$service_id argument is not an numeric (value: "' . $service_id . '")'); } return $this->db->get_where('ea_services', array('id' => $service_id))->row_array(); } /** * Get a specific field value from the database. * * @param string $field_name The field name of the value to be * returned. * @param int $service_id The selected record's id. * @return string Returns the records value from the database. */ public function get_value($field_name, $service_id) { if (!is_numeric($service_id)) { throw new Exception('Invalid argument provided as $service_id : ' . $service_id); } if (!is_string($field_name)) { throw new Exception('$field_name argument is not a string : ' . $field_name); } if ($this->db->get_where('ea_services', array('id' => $service_id))->num_rows() == 0) { throw new Exception('The record with the $service_id argument does not exist in the database : ' . $service_id); } $row_data = $this->db->get_where('ea_services', array('id' => $service_id))->row_array(); if (!isset($row_data[$field_name])) { throw new Exception('The given $field_name argument does not exist in the database : ' . $field_name); } return $this->db->get_where('ea_services', array('id' => $service_id))->row_array()[$field_name]; } /** * Get all, or specific records from service's table. * * @example $this->Model->getBatch('id = ' . $recordId); * * @param string $whereClause (OPTIONAL) The WHERE clause of * the query to be executed. DO NOT INCLUDE 'WHERE' KEYWORD. * @return array Returns the rows from the database. */ public function get_batch($where_clause = NULL) { if ($where_clause != NULL) { $this->db->where($where_clause); } return $this->db->get('ea_services')->result_array(); } /** * This method returns all the services from the database. * * @return array Returns an object array with all the * database services. */ public function get_available_services() { $this->db->distinct(); return $this->db ->select('ea_services.*') ->from('ea_services') ->join('ea_services_providers', 'ea_services_providers.id_services = ea_services.id', 'inner') ->get()->result_array(); } /** * Add (insert or update) a service category record into database. * * @param array $category Containst the service category data. * @return int Returns the record id.s */ public function add_category($category) { if (!$this->validate_category($category)) { throw new Exception('Service category data are invalid.'); } if (!isset($category['id'])) { $this->db->insert('ea_service_categories', $category); $category['id'] = $this->db->insert_id(); } else { $this->db->where('id', $category['id']); $this->db->update('ea_service_categories', $category); } return intval($category['id']); } /** * Delete a service category record from the database. * * @param numeric $category_id Record id to be deleted. * @return bool Returns the delete operation result. */ public function delete_category($category_id) { if (!is_numeric($category_id)) { throw new Exception('Invalid argument given for $category_id: ' . $category_id); } $num_rows = $this->db->get_where('ea_service_categories', array('id' => $category_id)) ->num_rows(); if ($num_rows == 0) { throw new Exception('Service category record not found in database.'); } $this->db->where('id', $category_id); return $this->db->delete('ea_service_categories'); } /** * Get a service category record data. * * @param numeric $category_id Record id to be retrieved. * @return array Returns the record data from the database. */ public function get_category($category_id) { if (!is_numeric($category_id)) { throw new Exception('Invalid argument type given $category_id: ' . $category_id); } $result = $this->db->get_where('ea_service_categories', array('id' => $category_id)); if ($result->num_rows() == 0) { throw new Exception('Service category record does not exist.'); } return $result->row_array(); } /** * Get all service category records from database. * * @return array Returns an array that contains all the service category records. */ public function get_all_categories($where = '') { if ($where !== '') $this->db->where($where); return $this->db->get('ea_service_categories')->result_array(); } /** * Validate a service category record data. This method must be used before adding * a service category record into database in order to secure the record integrity. * * @param array $category Contains the service category data. * @return bool Returns the validation result. */ public function validate_category($category) { try { // Required Fields if (!isset($category['name'])) { throw new Exception('Not all required fields where provided '); } if ($category['name'] == '' || $category['name'] == NULL) { throw new Exception('Required fields cannot be empty or null ($category: ' . print_r($category, TRUE) . ')'); } return TRUE; } catch(Exception $exc) { return FALSE; } } } /* End of file services_model.php */ /* Location: ./application/models/services_model.php */