From eaf20c2f298317719ded08cfda27016adcaa3a4f Mon Sep 17 00:00:00 2001
From: Dietmar Maurer <dietmar@proxmox.com>
Date: Tue, 5 Jun 2018 07:51:00 +0200
Subject: [PATCH] imported SectionConfig from pve-common

---
 Makefile             |   1 +
 PVE/SectionConfig.pm | 497 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 498 insertions(+)
 create mode 100644 PVE/SectionConfig.pm

diff --git a/Makefile b/Makefile
index c9bbbbe..71b56e1 100644
--- a/Makefile
+++ b/Makefile
@@ -30,6 +30,7 @@ install:  pve-api-definition.js
 	install -m 0644 PVE/RESTHandler.pm  ${LIB_DIR}/PVE
 	install -m 0644 PVE/CLIHandler.pm ${LIB_DIR}/PVE
 	install -m 0644 PVE/PTY.pm ${LIB_DIR}/PVE
+	install -m 0644 PVE/SectionConfig.pm ${LIB_DIR}/PVE
 	# install pveclient
 	install -D -m 0644 PVE/APIClient/Helpers.pm ${LIB_DIR}/PVE/APIClient/Helpers.pm
 	install -D -m 0644 PVE/APIClient/Config.pm ${LIB_DIR}/PVE/APIClient/Config.pm
diff --git a/PVE/SectionConfig.pm b/PVE/SectionConfig.pm
new file mode 100644
index 0000000..cc03aea
--- /dev/null
+++ b/PVE/SectionConfig.pm
@@ -0,0 +1,497 @@
+package PVE::SectionConfig;
+
+use strict;
+use warnings;
+use Digest::SHA;
+use PVE::Exception qw(raise_param_exc);
+use PVE::JSONSchema qw(get_standard_option);
+
+use Data::Dumper;
+
+my $defaultData = {
+    options => {},
+    plugins => {},
+    plugindata => {},
+    propertyList => {},
+};
+
+sub private {
+    die "overwrite me";
+    return $defaultData;
+}
+
+sub register {
+    my ($class) = @_;
+
+    my $type = $class->type();
+    my $pdata = $class->private();
+
+    die "duplicate plugin registration (type = $type)"
+	if defined($pdata->{plugins}->{$type});
+
+    my $plugindata = $class->plugindata();
+    $pdata->{plugindata}->{$type} = $plugindata;
+    $pdata->{plugins}->{$type} = $class;
+}
+
+sub type {
+    die "overwrite me";
+}
+
+sub properties {
+    return {};
+}
+
+sub options {
+    return {};
+}   
+
+sub plugindata {
+    return {};
+}   
+
+sub createSchema {
+    my ($class, $skip_type) = @_;
+
+    my $pdata = $class->private();
+    my $propertyList = $pdata->{propertyList};
+    my $plugins = $pdata->{plugins};
+
+    my $props = {};
+
+    my $copy_property = sub {
+	my ($src) = @_;
+
+	my $res = {};
+	foreach my $k (keys %$src) {
+	    $res->{$k} = $src->{$k};
+	}
+
+	return $res;
+    };
+
+    foreach my $p (keys %$propertyList) {
+	next if $skip_type && $p eq 'type';
+
+	if (!$propertyList->{$p}->{optional}) {
+	    $props->{$p} = $propertyList->{$p};
+	    next;
+	}
+
+	my $required = 1;
+
+	my $copts = $class->options();
+	$required = 0 if defined($copts->{$p}) && $copts->{$p}->{optional};
+
+	foreach my $t (keys %$plugins) {
+	    my $opts = $pdata->{options}->{$t} || {};
+	    $required = 0 if !defined($opts->{$p}) || $opts->{$p}->{optional};
+	}
+
+	if ($required) {
+	    # make a copy, because we modify the optional property
+	    my $res = &$copy_property($propertyList->{$p});
+	    $res->{optional} = 0;
+	    $props->{$p} = $res;
+	} else {
+	    $props->{$p} = $propertyList->{$p};
+	}
+    }
+
+    return {
+	type => "object",
+	additionalProperties => 0,
+	properties => $props,
+    };
+}
+
+sub updateSchema {
+    my ($class, $single_class) = @_;
+
+    my $pdata = $class->private();
+    my $propertyList = $pdata->{propertyList};
+    my $plugins = $pdata->{plugins};
+
+    my $props = {};
+
+    my $filter_type = $class->type() if $single_class;
+
+    foreach my $p (keys %$propertyList) {
+	next if $p eq 'type';
+
+	my $copts = $class->options();
+
+	next if defined($filter_type) && !defined($copts->{$p});
+
+	if (!$propertyList->{$p}->{optional}) {
+	    $props->{$p} = $propertyList->{$p};
+	    next;
+	}
+
+	my $modifyable = 0;
+
+	$modifyable = 1 if defined($copts->{$p}) && !$copts->{$p}->{fixed};
+
+	foreach my $t (keys %$plugins) {
+	    my $opts = $pdata->{options}->{$t} || {};
+	    next if !defined($opts->{$p});
+	    $modifyable = 1 if !$opts->{$p}->{fixed};
+	}
+	next if !$modifyable;
+
+	$props->{$p} = $propertyList->{$p};
+    }
+
+    $props->{digest} = get_standard_option('pve-config-digest');
+
+    $props->{delete} = {
+	type => 'string', format => 'pve-configid-list',
+	description => "A list of settings you want to delete.",
+	maxLength => 4096,
+	optional => 1,
+    };
+
+    return {
+	type => "object",
+	additionalProperties => 0,
+	properties => $props,
+    };
+}
+
+sub init {
+    my ($class) = @_;
+
+    my $pdata = $class->private();
+
+    foreach my $k (qw(options plugins plugindata propertyList)) {
+	$pdata->{$k} = {} if !$pdata->{$k};
+    }
+
+    my $plugins = $pdata->{plugins};
+    my $propertyList = $pdata->{propertyList};
+
+    foreach my $type (keys %$plugins) {
+	my $props = $plugins->{$type}->properties();
+	foreach my $p (keys %$props) {
+	    die "duplicate property '$p'" if defined($propertyList->{$p});
+	    my $res = $propertyList->{$p} = {};
+	    my $data = $props->{$p};
+	    for my $a (keys %$data) {
+		$res->{$a} = $data->{$a};
+	    }
+	    $res->{optional} = 1;
+	}
+    }
+
+    foreach my $type (keys %$plugins) {
+	my $opts = $plugins->{$type}->options();
+	foreach my $p (keys %$opts) {
+	    die "undefined property '$p'" if !$propertyList->{$p};
+	}
+	$pdata->{options}->{$type} = $opts;
+    }
+
+    $propertyList->{type}->{type} = 'string';
+    $propertyList->{type}->{enum} = [sort keys %$plugins];
+}
+
+sub lookup {
+    my ($class, $type) = @_;
+
+    my $pdata = $class->private();
+    my $plugin = $pdata->{plugins}->{$type};
+
+    die "unknown section type '$type'\n" if !$plugin;
+
+    return $plugin;
+}
+
+sub lookup_types {
+    my ($class) = @_;
+
+    my $pdata = $class->private();
+    
+    return [ sort keys %{$pdata->{plugins}} ];
+}
+
+sub decode_value {
+    my ($class, $type, $key, $value) = @_;
+
+    return $value;
+}
+
+sub encode_value {
+    my ($class, $type, $key, $value) = @_;
+
+    return $value;
+}
+
+sub check_value {
+    my ($class, $type, $key, $value, $storeid, $skipSchemaCheck) = @_;
+
+    my $pdata = $class->private();
+
+    return $value if $key eq 'type' && $type eq $value;
+
+    my $opts = $pdata->{options}->{$type};
+    die "unknown section type '$type'\n" if !$opts; 
+
+    die "unexpected property '$key'\n" if !defined($opts->{$key});
+
+    my $schema = $pdata->{propertyList}->{$key};
+    die "unknown property type\n" if !$schema;
+
+    my $ct = $schema->{type};
+
+    $value = 1 if $ct eq 'boolean' && !defined($value);
+
+    die "got undefined value\n" if !defined($value);
+
+    die "property contains a line feed\n" if $value =~ m/[\n\r]/;
+
+    if (!$skipSchemaCheck) {
+	my $errors = {};
+	PVE::JSONSchema::check_prop($value, $schema, '', $errors);
+	if (scalar(keys %$errors)) {
+	    die "$errors->{$key}\n" if $errors->{$key};
+	    die "$errors->{_root}\n" if $errors->{_root};
+	    die "unknown error\n";
+	}
+    }
+
+    if ($ct eq 'boolean' || $ct eq 'integer' || $ct eq 'number') {
+	return $value + 0; # convert to number
+    }
+
+    return $value;
+}
+
+sub parse_section_header {
+    my ($class, $line) = @_;
+
+    if ($line =~ m/^(\S+):\s*(\S+)\s*$/) {
+	my ($type, $sectionId) = ($1, $2);
+	my $errmsg = undef; # set if you want to skip whole section
+	my $config = {}; # to return additional attributes
+	return ($type, $sectionId, $errmsg, $config);
+    }
+    return undef;
+}
+
+sub format_section_header {
+    my ($class, $type, $sectionId, $scfg, $done_hash) = @_;
+
+    return "$type: $sectionId\n";
+}
+
+
+sub parse_config {
+    my ($class, $filename, $raw) = @_;
+
+    my $pdata = $class->private();
+
+    my $ids = {};
+    my $order = {};
+
+    $raw = '' if !defined($raw);
+
+    my $digest = Digest::SHA::sha1_hex($raw);
+    
+    my $pri = 1;
+
+    my $lineno = 0;
+    my @lines = split(/\n/, $raw);
+    my $nextline = sub {
+	while (my $line = shift @lines) {
+	    $lineno++;
+	    return $line if $line !~ /^\s*(?:#|$)/;
+	}
+    };
+
+    while (my $line = &$nextline()) {
+	my $errprefix = "file $filename line $lineno";
+
+	my ($type, $sectionId, $errmsg, $config) = $class->parse_section_header($line);
+	if ($config) {
+	    my $ignore = 0;
+
+	    my $plugin;
+
+	    if ($errmsg) {
+		$ignore = 1;
+		chomp $errmsg;
+		warn "$errprefix (skip section '$sectionId'): $errmsg\n";
+	    } elsif (!$type) {
+		$ignore = 1;
+		warn "$errprefix (skip section '$sectionId'): missing type - internal error\n";
+	    } else {
+		if (!($plugin = $pdata->{plugins}->{$type})) {
+		    $ignore = 1;
+		    warn "$errprefix (skip section '$sectionId'): unsupported type '$type'\n";
+		}
+	    }
+
+	    while ($line = &$nextline()) {
+		next if $ignore; # skip
+
+		$errprefix = "file $filename line $lineno";
+
+		if ($line =~ m/^\s+(\S+)(\s+(.*\S))?\s*$/) {
+		    my ($k, $v) = ($1, $3);
+   
+		    eval {
+			die "duplicate attribute\n" if defined($config->{$k});
+			$config->{$k} = $plugin->check_value($type, $k, $v, $sectionId);
+		    };
+		    warn "$errprefix (section '$sectionId') - unable to parse value of '$k': $@" if $@;
+
+		} else {
+		    warn "$errprefix (section '$sectionId') - ignore config line: $line\n";
+		}
+	    }
+
+	    if (!$ignore && $type && $plugin && $config) {
+		$config->{type} = $type;
+		eval { $ids->{$sectionId} = $plugin->check_config($sectionId, $config, 1, 1); };
+		warn "$errprefix (skip section '$sectionId'): $@" if $@;
+		$order->{$sectionId} = $pri++;
+	    }
+
+	} else {
+	    warn "$errprefix - ignore config line: $line\n";
+	}
+    }
+
+
+    my $cfg = { ids => $ids, order => $order, digest => $digest};
+
+    return $cfg;
+}
+
+sub check_config {
+    my ($class, $sectionId, $config, $create, $skipSchemaCheck) = @_;
+
+    my $type = $class->type();
+    my $pdata = $class->private();
+    my $opts = $pdata->{options}->{$type};
+
+    my $settings = { type => $type };
+
+    foreach my $k (keys %$config) {
+	my $value = $config->{$k};
+	
+	die "can't change value of fixed parameter '$k'\n"
+	    if !$create && $opts->{$k}->{fixed};
+	
+	if (defined($value)) {
+	    my $tmp = $class->check_value($type, $k, $value, $sectionId, $skipSchemaCheck);
+	    $settings->{$k} = $class->decode_value($type, $k, $tmp);
+	} else {
+	    die "got undefined value for option '$k'\n";
+	}
+    }
+
+    if ($create) {
+	# check if we have a value for all required options
+	foreach my $k (keys %$opts) {
+	    next if $opts->{$k}->{optional};
+	    die "missing value for required option '$k'\n"
+		if !defined($config->{$k});
+	}
+    }
+
+    return $settings;
+}
+
+my $format_config_line = sub {
+    my ($schema, $key, $value) = @_;
+
+    my $ct = $schema->{type};
+
+    die "property '$key' contains a line feed\n"
+	if ($key =~ m/[\n\r]/) || ($value =~ m/[\n\r]/);
+
+    if ($ct eq 'boolean') {
+	return "\t$key " . ($value ? 1 : 0) . "\n"
+	    if defined($value);
+    } else {
+	return "\t$key $value\n" if "$value" ne '';
+    }
+};
+
+sub write_config {
+    my ($class, $filename, $cfg) = @_;
+
+    my $pdata = $class->private();
+    my $propertyList = $pdata->{propertyList};
+
+    my $out = '';
+
+    my $ids = $cfg->{ids};
+    my $order = $cfg->{order};
+
+    my $maxpri = 0;
+    foreach my $sectionId (keys %$ids) {
+	my $pri = $order->{$sectionId}; 
+	$maxpri = $pri if $pri && $pri > $maxpri;
+    }
+    foreach my $sectionId (keys %$ids) {
+	if (!defined ($order->{$sectionId})) {
+	    $order->{$sectionId} = ++$maxpri;
+	} 
+    }
+
+    foreach my $sectionId (sort {$order->{$a} <=> $order->{$b}} keys %$ids) {
+	my $scfg = $ids->{$sectionId};
+	my $type = $scfg->{type};
+	my $opts = $pdata->{options}->{$type};
+
+	die "unknown section type '$type'\n" if !$opts;
+
+	my $done_hash = {};
+
+	my $data = $class->format_section_header($type, $sectionId, $scfg, $done_hash);
+	if ($scfg->{comment} && !$done_hash->{comment}) {
+	    my $k = 'comment';
+	    my $v = $class->encode_value($type, $k, $scfg->{$k});
+	    $data .= &$format_config_line($propertyList->{$k}, $k, $v);
+	}
+
+	$data .= "\tdisable\n" if $scfg->{disable} && !$done_hash->{disable};
+
+	$done_hash->{comment} = 1;
+	$done_hash->{disable} = 1;
+
+	my @option_keys = sort keys %$opts;
+	foreach my $k (@option_keys) {
+	    next if defined($done_hash->{$k});
+	    next if $opts->{$k}->{optional};
+	    $done_hash->{$k} = 1;
+	    my $v = $scfg->{$k};
+	    die "section '$sectionId' - missing value for required option '$k'\n"
+		if !defined ($v);
+	    $v = $class->encode_value($type, $k, $v);
+	    $data .= &$format_config_line($propertyList->{$k}, $k, $v);
+	}
+
+	foreach my $k (@option_keys) {
+	    next if defined($done_hash->{$k});
+	    my $v = $scfg->{$k};
+	    next if !defined($v);
+	    $v = $class->encode_value($type, $k, $v);
+	    $data .= &$format_config_line($propertyList->{$k}, $k, $v);
+	}
+
+	$out .= "$data\n";
+    }
+
+    return $out;
+}
+
+sub assert_if_modified {
+    my ($cfg, $digest) = @_;
+
+    PVE::Tools::assert_if_modified($cfg->{digest}, $digest);
+}
+
+1;
-- 
2.39.2