Adding mail report support.

cualsea-server/Makefile.PL

@@ -10,5 +10,11 @@ WriteMakefile(
     PREREQ_PM    => {
         'DBD::SQLite' => 0,
         'DateTime' => 0,
+        'Email::Sender::Simple' => 0,
+        'Email::Sender::Transport::SMTP' => 0,
+        'Email::MIME' => 0,
+        'IO::Socket::SSL' => 0,
+        'MIME::Base64' => 0,
+        'Authen::SASL' => 0,
     }
 );

cualsea-server/bin/cualsead

@@ -6,15 +6,34 @@ use strict;
 use warnings;
 
 use Carp qw/confess/;
+use POSIX qw/WNOHANG/;
+
+use Try::Tiny;
 
 use Cualsea::Server::Loop;
+use Cualsea::Server::MonitorController;
 
-my $loop = Cualsea::Server::Loop->new;
+my $pid = fork;
+if ($pid) {{
+    local $SIG{INT} = \&finish_parent;
+    while (1) {
+        my $loop = Cualsea::Server::Loop->new;
+        try {
+            $loop->run;
+        } catch {
+            confess $_;
+        };
+    }
+    finish_parent();
+}}
 
+my $monitor_controller = Cualsea::Server::MonitorController->new;
 while (1) {
-    try {
-        $loop->run;
-    } catch {
-        confess $_;
-    };
+    $monitor_controller->loop;
+}
+
+sub finish_parent {
+    kill 'INT', $pid;
+    1 while waitpid $pid, WNOHANG;
+    exit;
 }

cualsea-server/lib/Cualsea/Server/DB.pm

@@ -25,6 +25,11 @@ my @migrations = (
         date_execution TEXT,
         parameters TEXT,
         result TEXT
+    );',
+    'CREATE TABLE monitor (
+        id INTEGER PRIMARY KEY,
+        date_execution TEXT,
+        is_up INTEGER
     );'
 );
 

cualsea-server/lib/Cualsea/Server/Mail.pm

@@ -0,0 +1,88 @@
+package Cualsea::Server::Mail;
+
+use v5.30.0;
+
+use strict;
+use warnings;
+
+use Const::Fast;
+use Email::Sender::Transport::SMTP;
+use Email::Sender::Simple qw/sendmail/;
+use Email::MIME;
+
+const my $MAIL_CONFIG_FILE => '/etc/cualsea/mail.conf';
+const my $REPORT_TO_CONFIG_FILE => '/etc/cualsea/report_to';
+const my $FROM_CONFIG_FILE => '/etc/cualsea/from';
+
+sub new {
+    my $class = shift;
+    return bless {}, $class;
+}
+
+sub notify_service_down {
+    my $self = shift;
+    my $name = shift;
+
+    my $mime = Email::MIME->create(
+        header_str => [
+            From => $self->from,
+            To => [ $self->report_to ],
+            Subject => "Service $name down",
+        ],
+        parts => [
+            Email::MIME->create(
+                attributes => {
+                    content_type => 'text/plain',
+                    disposition => 'attachment',
+                    charset => 'UTF-8',
+                    encoding => "8bit",
+                },
+                body_str => "$name is not up",
+            )
+        ]
+    );
+    sendmail($mime, { transport => $self->transport });
+}
+
+sub report_to {
+    my $self    = shift;
+    if (!defined $self->{report_to}) {
+        open my $fh, '<', $REPORT_TO_CONFIG_FILE or die "Unable to get mail to report from config file";
+        my $email = <$fh>;
+        chomp $email;
+        close $fh;
+        $self->{report_to} = $email;
+    }
+    return $self->{report_to};
+}
+
+sub from {
+    my $self    = shift;
+    if (!defined $self->{from}) {
+        open my $fh, '<', $FROM_CONFIG_FILE or die "Unable to get mail From from config file";
+        my $email = <$fh>;
+        chomp $email;
+        close $fh;
+        $self->{from} = $email;
+    }
+    return $self->{from};
+}
+
+sub transport {
+    my $self    = shift;
+    if (!defined $self->{transport}) {
+        my %parameters;
+        open my $fh, '<', $MAIL_CONFIG_FILE or die "Unable to get transport from config file";
+        while (my $line = <$fh>) {
+            my ($key, $value) = $line =~ /^(.*?)=(.*?)\s*$/;
+            if ($key eq 'hosts') {
+                $value = [ $value ];
+            }
+            $parameters{$key} = $value;
+        }
+        close $fh;
+        $self->{transport} = Email::Sender::Transport::SMTP->new(%parameters);
+    }
+    return $self->{transport};
+}
+1;

cualsea-server/lib/Cualsea/Server/MessageController.pm

@@ -18,6 +18,7 @@ use JSON;
 
 use Cualsea::MessageManager;
 use Cualsea::Server::DB;
+use Cualsea::Server::Service;
 
 sub handle_add {
     my %params  = @_;
@@ -62,7 +63,7 @@ sub handle_del {
     my $name   = $params{name};
     my $dbh    = Cualsea::Server::DB->dbh();
 
-    if ( !check_if_service_exists_in_db($name) ) {
+    if ( !Cualsea::Server::Service::check_if_service_exists_in_db($name) ) {
         return {
             is_error => 1,
             desc     => 'Service not found.',
@@ -81,23 +82,13 @@ EOF
     };
 }
 
-sub check_if_service_exists_in_db {
-    my $name    = shift;
-    my $dbh     = Cualsea::Server::DB->dbh();
-    my $service = $dbh->selectrow_hashref( <<"EOF", undef, $name );
-SELECT name FROM services WHERE name = ?
-EOF
-    if ( !defined $service ) {
-        return 0;
-    }
-    return 1;
-}
+
 
 sub handle_start {
     my %params = @_;
     my $name   = $params{name};
 
-    if ( !check_if_service_exists_in_db($name) ) {
+    if ( !Cualsea::Server::Service::check_if_service_exists_in_db($name) ) {
         return {
             is_error => 1,
             desc     => 'Service not found.',
@@ -105,7 +96,7 @@ sub handle_start {
         };
     }
 
-    if ( _is_started_service($name) ) {
+    if ( Cualsea::Server::Service::is_started_service($name) ) {
         return {
             is_error => 1,
             desc     => 'Service already started.',
@@ -120,23 +111,19 @@ sub handle_start {
     };
 }
 
-sub _is_started_service {
-    my $name = shift;
-    return !system "/etc/init.d/$name", 'status';
-}
 
 sub handle_stop {
     my %params = @_;
     my $name   = $params{name};
 
-    if ( !check_if_service_exists_in_db($name) ) {
+    if ( !Cualsea::Server::Service::check_if_service_exists_in_db($name) ) {
         return {
             is_error => 1,
             desc     => 'Service not found.',
             status   => 404,
         };
     }
-    if ( !_is_started_service($name) ) {
+    if ( !Cualsea::Server::Service::is_started_service($name) ) {
         return {
             is_error => 1,
             desc     => 'Service already stopped.',
@@ -156,7 +143,7 @@ sub handle_restart {
     my %params = @_;
     my $name   = $params{name};
 
-    if ( !check_if_service_exists_in_db($name) ) {
+    if ( !Cualsea::Server::Service::check_if_service_exists_in_db($name) ) {
         return {
             is_error => 1,
             desc     => 'Service not found.',

cualsea-server/lib/Cualsea/Server/MonitorController.pm

@@ -0,0 +1,68 @@
+package Cualsea::Server::MonitorController;
+
+use v5.30.0;
+
+use strict;
+use warnings;
+
+use DateTime;
+
+use Cualsea::Server::DB;
+use Cualsea::Server::Service;
+use Cualsea::Server::Mail;
+
+sub new {
+    my $class = shift;
+    return bless {}, $class;
+}
+
+sub last_date {
+    my $self   = shift;
+    if ( !exists $self->{last_date} ) {
+        $self->{last_date} = DateTime->now();
+    }
+    return $self->{last_date};
+}
+
+sub loop {
+    my $self   = shift;
+    my $last_date    = $self->last_date;
+    my $current_date = DateTime->now();
+    if ( $current_date > $last_date->clone->add( minutes => 1 ) ) {
+        $self->{last_date} = $current_date;
+        $self->monitor;
+    }
+}
+
+sub monitor {
+    my $self     = shift;
+    my $dbh     = Cualsea::Server::DB->dbh();
+    my $services = $dbh->selectall_arrayref( <<'EOF', { Slice => {} } );
+SELECT name,pidfile FROM services;
+EOF
+    for my $service (@$services) {
+        my $pidfile = $service->{pidfile};
+        my $name    = $service->{name};
+        my $started = Cualsea::Server::Service::is_started_service($name);
+        if ($started) {{
+            my $success_opening = open my $fh, '<', $pidfile; 
+            if (!$success_opening) {
+                $started = 0;
+                # Cool trick to escape if {{ }}
+                next;
+            }
+            my $pid = <$fh>;
+            chomp $pid;
+            $started = !system 'ps', '-p', $pid;
+            close $fh;
+        }}
+        $dbh->do( 'INSERT INTO monitor (date_execution, is_up) VALUES (?, ?);',
+            undef, DateTime->now() . '', $started );
+        if (!$started) {
+            say "$name stopped";
+            my $mailer = Cualsea::Server::Mail->new();
+            $mailer->notify_service_down($name);
+        }
+    }
+}
+1;

cualsea-server/lib/Cualsea/Server/Service.pm

@@ -0,0 +1,24 @@
+package Cualsea::Server::Service;
+
+use v5.30.0;
+
+use strict;
+use warnings;
+
+sub is_started_service {
+    my $name = shift;
+    return !system "/etc/init.d/$name", 'status';
+}
+
+sub check_if_service_exists_in_db {
+    my $name    = shift;
+    my $dbh     = Cualsea::Server::DB->dbh();
+    my $service = $dbh->selectrow_hashref( <<"EOF", undef, $name );
+SELECT name FROM services WHERE name = ?
+EOF
+    if ( !defined $service ) {
+        return 0;
+    }
+    return 1;
+}
+1;