diff --git a/database.sql b/database.sql
index c480b4c..0f4b552 100644
--- a/database.sql
+++ b/database.sql
@@ -75,29 +75,34 @@ create table `user` (
) character set utf8mb4,
collate utf8mb4_unicode_ci;
-create table `loan` (
+create table `event` (
`id` bigint(20) not null auto_increment,
primary key(`id`),
- `user` bigint(20) not null,
- constraint `l_f_user`
- foreign key(`user`) references `user`(`id`),
`product` bigint(20) not null,
- constraint `l_f_product`
+ constraint `e_f_product`
foreign key(`product`) references `product`(`id`),
`starttime` bigint(20) not null,
- `endtime` bigint(20) not null,
`returntime` bigint(20) default null
) character set utf8mb4,
collate utf8mb4_unicode_ci;
+create table `loan` (
+ `event` bigint(20) not null,
+ primary key(`event`),
+ constraint `l_f_event`
+ foreign key(`event`) references `event`(`id`),
+ `user` bigint(20) not null,
+ constraint `l_f_user`
+ foreign key(`user`) references `user`(`id`),
+ `endtime` bigint(20) not null
+) character set utf8mb4,
+ collate utf8mb4_unicode_ci;
+
create table `service` (
- `id` bigint(20) not null auto_increment,
- primary key(`id`),
- `product` bigint(20) not null,
- constraint `s_f_product`
- foreign key(`product`) references `product`(`id`),
- `starttime` bigint(20) not null,
- `returntime` bigint(20) default null
+ `event` bigint(20) not null,
+ primary key(`event`),
+ constraint `s_f_event`
+ foreign key(`event`) references `event`(`id`)
) character set utf8mb4,
collate utf8mb4_unicode_ci;
diff --git a/include/Event.php b/include/Event.php
new file mode 100644
index 0000000..a697270
--- /dev/null
+++ b/include/Event.php
@@ -0,0 +1,104 @@
+<?php
+class Event {
+ protected $id = 0;
+ protected $product = 0;
+ protected $starttime = 0;
+ protected $returntime = null;
+
+ protected static function create_event($product) {
+ $status = $product->get_status();
+ if($status != 'available') {
+ $emsg = '';
+ $prod_id = $product->get_id();
+ switch($status) {
+ case 'on_loan':
+ case 'overdue':
+ $loan_id = $product->get_active_loan()->get_id();
+ $emsg = "Product $prod_id has an active "
+ . "loan (id $loan_id).";
+ break;
+ case 'discarded':
+ $emsg = "Product $prod_id has been discarded.";
+ break;
+ case 'service':
+ $service_id = $product->get_active_service()->get_id();
+ $emsg = "Product $prod_id is on service "
+ . "(id $service_id).";
+ break;
+ }
+ throw new Exception($emsg);
+ }
+ $now = time();
+ $insert = prepare('insert into
+ `event`(`product`, `starttime`)
+ values (?, ?)');
+ bind($insert, 'ii', $product->get_id(), $now);
+ execute($insert);
+ $event_id = $insert->insert_id;
+ return new Event($event_id);
+ }
+
+ public function __construct($id) {
+ $search = prepare('select `id` from `event`
+ where `id`=?');
+ bind($search, 'i', $id);
+ execute($search);
+ $result = result_single($search);
+ if($result === null) {
+ throw new Exception('Event does not exist.');
+ }
+ $this->id = $result['id'];
+ $this->update_fields();
+ }
+
+ protected function update_fields() {
+ $get = prepare('select * from `event` where `id`=?');
+ bind($get, 'i', $this->id);
+ execute($get);
+ $result = result_single($get);
+ $this->product = $result['product'];
+ $this->starttime = $result['starttime'];
+ $this->returntime = $result['returntime'];
+ }
+
+ public function get_id() {
+ return $this->id;
+ }
+
+ public function get_product() {
+ return new Product($this->product);
+ }
+
+ public function get_starttime() {
+ return $this->starttime;
+ }
+
+ public function get_returntime() {
+ return $this->returntime;
+ }
+
+ public function is_active() {
+ if($this->returntime === null) {
+ return true;
+ }
+ return false;
+ }
+
+ public function get_status() {
+ $class = strtolower(get_class($this));
+ if($this->is_active()) {
+ return 'active_' . $class;
+ }
+ return 'inactive_' . $class;
+ }
+
+ public function end() {
+ $now = time();
+ $query = prepare('update `event` set `returntime`=? where `id`=?');
+ bind($query, 'ii', $now, $this->id);
+ execute($query);
+ $this->returntime = $now;
+ return true;
+ }
+}
+?>
diff --git a/include/Loan.php b/include/Loan.php
index 1fb4fd6..3165de7 100644
--- a/include/Loan.php
+++ b/include/Loan.php
@@ -1,111 +1,52 @@
<?php
-class Loan {
- private $id = 0;
+class Loan extends Event {
private $user = 0;
- private $product = 0;
- private $starttime = 0;
private $endtime = 0;
- private $returntime = null;
public static function create_loan($user, $product, $endtime) {
- $status = $product->get_status();
- if($status != 'available') {
- $emsg = '';
- $prod_id = $product->get_id();
- switch($status) {
- case 'on_loan':
- case 'overdue':
- $loan_id = $product->get_active_loan()->get_id();
- $emsg = "Product $prod_id has an active ";
- $emsg .= "loan (id $loan_id) already.";
- break;
- case 'discarded':
- $emsg = "Product $prod_id has been discarded.";
- break;
- case 'service':
- $service_id = $product->get_active_service()->get_id();
- $emsg = "Product $prod_id is on service (id $service_id).";
- break;
- }
- throw new Exception($emsg);
- }
- $now = time();
- $insert = prepare('insert into
- `loan`(`user`, `product`, `starttime`, `endtime`)
- values (?, ?, ?, ?)');
- bind($insert, 'iiii',
- $user->get_id(), $product->get_id(),
- $now, strtotime($endtime . ' 13:00'));
+ begin_trans();
+ $event = parent::create_event($product);
+ $event_id = $event->get_id();
+ $insert = prepare('insert into `loan`(`user`, `endtime`) values (?, ?)');
+ bind($insert, 'ii', $user->get_id(), strtotime($endtime . ' 13:00'));
execute($insert);
- $loan_id = $insert->insert_id;
- return new Loan($loan_id);
+ commit_trans();
+ return new Loan($event_id);
}
public function __construct($id) {
- $search = prepare('select `id` from `loan`
- where `id`=?');
+ parent::__construct($id);
+ $search = prepare('select * from `loan` where `event`=?');
bind($search, 'i', $id);
execute($search);
$result = result_single($search);
if($result === null) {
throw new Exception('Loan does not exist.');
}
- $this->id = $result['id'];
$this->update_fields();
}
- private function update_fields() {
- $get = prepare('select * from `loan` where `id`=?');
+ protected function update_fields() {
+ parent::update_fields();
+ $get = prepare('select * from `loan` where `event`=?');
bind($get, 'i', $this->id);
execute($get);
$loan = result_single($get);
$this->user = $loan['user'];
- $this->product = $loan['product'];
- $this->starttime = $loan['starttime'];
$this->endtime = $loan['endtime'];
- $this->returntime = $loan['returntime'];
- }
-
- public function get_id() {
- return $this->id;
}
public function get_user() {
return new User($this->user);
}
- public function get_product() {
- return new Product($this->product);
- }
-
- public function get_duration($format = true) {
- $style = function($time) {
- return $time;
- };
- if($format) {
- $style = function($time) {
- if($time) {
- return gmdate('Y-m-d', $time);
- }
- return $time;
- };
- }
- return array('start' => $style($this->starttime),
- 'end' => $style($this->endtime),
- 'end_renew' => $style($this->endtime + 604800), # +1 week
- 'return' => $style($this->returntime));
- }
-
- public function is_active() {
- if($this->returntime === null) {
- return true;
- }
- return false;
+ public function get_endtime() {
+ return $this->endtime;
}
public function extend($time) {
$ts = strtotime($time . ' 13:00');
- $query = prepare('update `loan` set `endtime`=? where `id`=?');
+ $query = prepare('update `loan` set `endtime`=? where `event`=?');
bind($query, 'ii', $ts, $this->id);
execute($query);
$this->endtime = $ts;
@@ -114,7 +55,7 @@ class Loan {
public function end() {
$now = time();
- $query = prepare('update `loan` set `returntime`=? where `id`=?');
+ $query = prepare('update `event` set `returntime`=? where `id`=?');
bind($query, 'ii', $now, $this->id);
execute($query);
$this->returntime = $now;
@@ -131,5 +72,15 @@ class Loan {
}
return false;
}
+
+ public function get_status() {
+ if($this->is_overdue()) {
+ return 'overdue_loan';
+ }
+ if($this->is_active()) {
+ return 'active_loan';
+ }
+ return 'inactive_loan';
+ }
}
?>
diff --git a/include/Service.php b/include/Service.php
index 5f19014..79f274a 100644
--- a/include/Service.php
+++ b/include/Service.php
@@ -1,109 +1,30 @@
<?php
-class Service {
- private $id = 0;
- private $product = 0;
- private $starttime = 0;
- private $returntime = null;
-
+class Service extends Event {
public static function create_service($product) {
- $status = $product->get_status();
- if($status != 'available') {
- $emsg = '';
- $prod_id = $product->get_id();
- switch($status) {
- case 'on_loan':
- case 'overdue':
- $loan_id = $product->get_active_loan()->get_id();
- $emsg = "Product $prod_id has an active ";
- $emsg .= "loan (id $loan_id).";
- break;
- case 'discarded':
- $emsg = "Product $prod_id has been discarded.";
- break;
- case 'service':
- $service_id = $product->get_active_service()->get_id();
- $emsg = "Product $prod_id is on service "
- ."(id $service_id) already.";
- break;
- }
- throw new Exception($emsg);
- }
- $now = time();
- $insert = prepare('insert into
- `service`(`product`, `starttime`)
- values (?, ?)');
- bind($insert, 'ii', $product->get_id(), $now);
+ begin_trans();
+ $event = parent::create_event($product);
+ $event_id = $event->get_id();
+ $insert = prepare('insert into `service`(`event`) values (?)');
+ bind($insert, 'i', $event_id);
execute($insert);
- $service_id = $insert->insert_id;
- return new Loan($service_id);
+ commit_trans();
+ return new Service($event_id);
}
public function __construct($id) {
- $search = prepare('select `id` from `service`
- where `id`=?');
+ parent::__construct($id);
+ $search = prepare('select * from `service` where `event`=?');
bind($search, 'i', $id);
execute($search);
$result = result_single($search);
if($result === null) {
throw new Exception('Service does not exist.');
}
- $this->id = $result['id'];
$this->update_fields();
}
-
- private function update_fields() {
- $get = prepare('select * from `service` where `id`=?');
- bind($get, 'i', $this->id);
- execute($get);
- $loan = result_single($get);
- $this->product = $loan['product'];
- $this->starttime = $loan['starttime'];
- $this->returntime = $loan['returntime'];
- }
- public function get_id() {
- return $this->id;
- }
-
- public function get_user() {
- return 'Service';
- }
-
- public function get_product() {
- return new Product($this->product);
- }
-
- public function get_duration($format = true) {
- $style = function($time) {
- return $time;
- };
- if($format) {
- $style = function($time) {
- if($time) {
- return gmdate('Y-m-d', $time);
- }
- return $time;
- };
- }
- return array('start' => $style($this->starttime),
- 'end' => '',
- 'return' => $style($this->returntime));
- }
-
- public function is_active() {
- if($this->returntime === null) {
- return true;
- }
- return false;
- }
-
- public function end() {
- $now = time();
- $query = prepare('update `service` set `returntime`=? where `id`=?');
- bind($query, 'ii', $now, $this->id);
- execute($query);
- $this->returntime = $now;
- return true;
+ protected function update_fields() {
+ parent::update_fields();
}
}
?>