api: notification: add api routes for filters

The Perl part of the API methods primarily defines the API schema,
checks for any needed priviledges and then calls the actual Rust
implementation exposed via perlmod. Any errors returned by the Rust
code are translated into PVE::Exception, so that the API call fails
with the correct HTTP error code.

Signed-off-by: Lukas Wagner <l.wagner@proxmox.com>

PVE/API2/Cluster/Notifications.pm

@@ -94,6 +94,7 @@ __PACKAGE__->register_method ({
     code => sub {
 	my $result = [
 	    { name => 'endpoints' },
+	    { name => 'filters' },
 	    { name => 'groups' },
 	];
 
@@ -898,4 +899,258 @@ __PACKAGE__->register_method ({
 	return;
     }
 });
+
+my $filter_properties = {
+    name => {
+	description => 'Name of the endpoint.',
+	type => 'string',
+	format => 'pve-configid',
+    },
+    'min-severity' => {
+	type => 'string',
+	description => 'Minimum severity to match',
+	optional => 1,
+	enum => [qw(info notice warning error)],
+    },
+    mode => {
+	type => 'string',
+	description => "Choose between 'and' and 'or' for when multiple properties are specified",
+	optional => 1,
+	enum => [qw(and or)],
+	default => 'and',
+    },
+    'invert-match' => {
+	type => 'boolean',
+	description => 'Invert match of the whole filter',
+	optional => 1,
+    },
+    'comment' => {
+	description => 'Comment',
+	type        => 'string',
+	optional    => 1,
+    },
+};
+
+__PACKAGE__->register_method ({
+    name => 'get_filters',
+    path => 'filters',
+    method => 'GET',
+    description => 'Returns a list of all filters',
+    protected => 1,
+    permissions => {
+	description => "Only lists entries where you have 'Mapping.Modify', 'Mapping.Use' or"
+	    . " 'Mapping.Audit' permissions on '/mapping/notification/<name>'.",
+	user => 'all',
+    },
+    parameters => {
+	additionalProperties => 0,
+	properties => {},
+    },
+    returns => {
+	type => 'array',
+	items => {
+	    type => 'object',
+	    properties => $filter_properties,
+	},
+	links => [ { rel => 'child', href => '{name}' } ],
+    },
+    code => sub {
+	my $config = PVE::Notify::read_config();
+	my $rpcenv = PVE::RPCEnvironment::get();
+
+	my $entities = eval {
+	    $config->get_filters();
+	};
+	raise_api_error($@) if $@;
+
+	return filter_entities_by_privs($rpcenv, $entities);
+    }
+});
+
+__PACKAGE__->register_method ({
+    name => 'get_filter',
+    path => 'filters/{name}',
+    method => 'GET',
+    description => 'Return a specific filter',
+    protected => 1,
+    permissions => {
+	check => ['or',
+	    ['perm', '/mapping/notification/{name}', ['Mapping.Modify']],
+	    ['perm', '/mapping/notification/{name}', ['Mapping.Audit']],
+	],
+    },
+    parameters => {
+	additionalProperties => 0,
+	properties => {
+	    name => {
+		type => 'string',
+		format => 'pve-configid',
+	    },
+	}
+    },
+    returns => {
+	type => 'object',
+	properties => {
+	    %$filter_properties,
+	    digest => get_standard_option('pve-config-digest'),
+	},
+    },
+    code => sub {
+	my ($param) = @_;
+	my $name = extract_param($param, 'name');
+
+	my $config = PVE::Notify::read_config();
+
+	my $filter = eval {
+	    $config->get_filter($name)
+	};
+
+	raise_api_error($@) if $@;
+	$filter->{digest} = $config->digest();
+
+	return $filter;
+    }
+});
+
+__PACKAGE__->register_method ({
+    name => 'create_filter',
+    path => 'filters',
+    protected => 1,
+    method => 'POST',
+    description => 'Create a new filter',
+    protected => 1,
+    permissions => {
+	check => ['perm', '/mapping/notification', ['Mapping.Modify']],
+    },
+    parameters => {
+	additionalProperties => 0,
+	properties => $filter_properties,
+    },
+    returns => { type => 'null' },
+    code => sub {
+	my ($param) = @_;
+
+	my $name = extract_param($param, 'name');
+	my $min_severity = extract_param($param, 'min-severity');
+	my $mode = extract_param($param, 'mode');
+	my $invert_match = extract_param($param, 'invert-match');
+	my $comment = extract_param($param, 'comment');
+
+	eval {
+	    PVE::Notify::lock_config(sub {
+		my $config = PVE::Notify::read_config();
+
+		$config->add_filter(
+		    $name,
+		    $min_severity,
+		    $mode,
+		    $invert_match,
+		    $comment,
+		);
+
+		PVE::Notify::write_config($config);
+	    });
+	};
+
+	raise_api_error($@) if $@;
+	return;
+    }
+});
+
+__PACKAGE__->register_method ({
+    name => 'update_filter',
+    path => 'filters/{name}',
+    protected => 1,
+    method => 'PUT',
+    description => 'Update existing filter',
+    permissions => {
+	check => ['perm', '/mapping/notification/{name}', ['Mapping.Modify']],
+    },
+    parameters => {
+	additionalProperties => 0,
+	properties => {
+	    %{ make_properties_optional($filter_properties) },
+	    delete => {
+		type => 'array',
+		items => {
+		    type => 'string',
+		    format => 'pve-configid',
+		},
+		optional => 1,
+		description => 'A list of settings you want to delete.',
+	    },
+	    digest => get_standard_option('pve-config-digest'),
+	},
+    },
+    returns => { type => 'null' },
+    code => sub {
+	my ($param) = @_;
+
+	my $name = extract_param($param, 'name');
+	my $min_severity = extract_param($param, 'min-severity');
+	my $mode = extract_param($param, 'mode');
+	my $invert_match = extract_param($param, 'invert-match');
+	my $comment = extract_param($param, 'comment');
+	my $digest = extract_param($param, 'digest');
+	my $delete = extract_param($param, 'delete');
+
+	eval {
+	    PVE::Notify::lock_config(sub {
+		my $config = PVE::Notify::read_config();
+
+		$config->update_filter(
+		    $name,
+		    $min_severity,
+		    $mode,
+		    $invert_match,
+		    $comment,
+		    $delete,
+		    $digest,
+		);
+
+		PVE::Notify::write_config($config);
+	    });
+	};
+
+	raise_api_error($@) if $@;
+	return;
+    }
+});
+
+__PACKAGE__->register_method ({
+    name => 'delete_filter',
+    protected => 1,
+    path => 'filters/{name}',
+    method => 'DELETE',
+    description => 'Remove filter',
+    permissions => {
+	check => ['perm', '/mapping/notification/{name}', ['Mapping.Modify']],
+    },
+    parameters => {
+	additionalProperties => 0,
+	properties => {
+	    name => {
+		type => 'string',
+		format => 'pve-configid',
+	    },
+	}
+    },
+    returns => { type => 'null' },
+    code => sub {
+	my ($param) = @_;
+	my $name = extract_param($param, 'name');
+
+	eval {
+	    PVE::Notify::lock_config(sub {
+		my $config = PVE::Notify::read_config();
+		$config->delete_filter($name);
+		PVE::Notify::write_config($config);
+	    });
+	};
+
+	raise_api_error($@) if $@;
+	return;
+    }
+});
+
 1;