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