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#! /usr/bin/perl
use strict;
use warnings;

use mrw::Targets;
use mrw::Inventory;
use mrw::Util;
use Getopt::Long; # For parsing command line arguments
use YAML::Tiny qw(LoadFile);

# Globals
my $serverwizFile  = "";
my $debug           = 0;
my $outputFile     = "";
my $metaDataFile   = "";

# Command line argument parsing
GetOptions(
"i=s" => \$serverwizFile,    # string
"m=s" => \$metaDataFile,     # string
"o=s" => \$outputFile,       # string
"d"   => \$debug,
)
or printUsage();

if (($serverwizFile eq "") or ($outputFile eq "") or ($metaDataFile eq ""))
{
    printUsage();
}

my $targetObj = Targets->new;
$targetObj->loadXML($serverwizFile);

#open the mrw xml and the metaData file for the sensor.
#Fetch the sensorid,sensortype,class,object path from the mrw.
#Get the metadata for that sensor from the metadata file.
#Merge the data into the outputfile

open(my $fh, '>', $outputFile) or die "Could not open file '$outputFile' $!";
my $sensorTypeConfig = LoadFile($metaDataFile);

my @interestedTypes = keys %{$sensorTypeConfig};
my %types;
my %entityDict;

@types{@interestedTypes} = ();

my @inventory = Inventory::getInventory($targetObj);
#Process all the targets in the XML
foreach my $target (sort keys %{$targetObj->getAllTargets()})
{
    my $sensorID = '';
    my $sensorType = '';
    my $sensorReadingType = '';
    my $path = '';
    my $obmcPath = '';
    my $sensorName = '';
    my $entityID = '';
    my $entityInstance = '';

    if ($targetObj->getTargetType($target) eq "unit-ipmi-sensor") {

        $sensorName = $targetObj->getInstanceName($target);
        #not interested in this sensortype
        next if (not exists $types{$sensorName});

        $entityID = $targetObj->getAttribute($target, "IPMI_ENTITY_ID");
        if (exists ($entityDict{$entityID}))
        {
            $entityDict{$entityID}++;
        }
        else
        {
            $entityDict{$entityID} = '1';
        }
        $entityInstance = $entityDict{$entityID};

        $sensorID = $targetObj->getAttribute($target, "IPMI_SENSOR_ID");

        $sensorType = hex($targetObj->getAttribute($target,
                             "IPMI_SENSOR_TYPE"));

        $sensorReadingType = $targetObj->getAttribute($target,
                             "IPMI_SENSOR_READING_TYPE");

        $path = $targetObj->getAttribute($target, "INSTANCE_PATH");

        #if there is ipmi sensor without sensorid or sensorReadingType or
        #Instance path then die

        if ($sensorID eq '' or $sensorReadingType eq '' or $path eq '') {
            close $fh;
            die("sensor without info for target=$target");
        }

        if (exists $sensorTypeConfig->{$sensorName}{"path"}) {
            $obmcPath = $sensorTypeConfig->{$sensorName}->{"path"};
        }
        else {
            #removing the string "instance:" from path
            $path =~ s/^instance:/\//;
            $obmcPath = Util::getObmcName(\@inventory,$path);
        }

        # TODO via openbmc/openbmc#2144 - this fixup shouldn't be needed.
        $obmcPath = checkOccPathFixup($obmcPath);

        if (not defined $obmcPath) {
            close $fh;
            die("Unable to get the obmc path for path=$path");
        }

        print $fh $sensorID.":\n";

        my $serviceInterface =
            $sensorTypeConfig->{$sensorName}->{"serviceInterface"};
        my $readingType = $sensorTypeConfig->{$sensorName}->{"readingType"};
        my $sensorNamePattern = $sensorTypeConfig->{$sensorName}->{"sensorNamePattern"};

        my $debug = "$sensorID : $sensorName : $sensorType : ";
        $debug .= "$sensorReadingType : $entityID : $entityInstance : ";
        $debug .= "$obmcPath \n";
        printDebug("$debug");

        writeToFile($sensorName,$sensorType,$sensorReadingType,$obmcPath,$serviceInterface,
            $readingType,$sensorTypeConfig,$entityID,$entityInstance,$sensorNamePattern,$fh);

    }

}
close $fh;


#Get the metadata for the incoming sensortype from the loaded config file.
#Write the sensor data into the output file

sub writeToFile
{
    my ($sensorName,$sensorType,$sensorReadingType,$path,$serviceInterface,
        $readingType,$sensorTypeConfig,$entityID,$entityInstance,
        $sensorNamePattern,$fh) = @_;

    print $fh "  entityID: ".$entityID."\n";
    print $fh "  entityInstance: ".$entityInstance."\n";
    print $fh "  sensorType: ".$sensorType."\n";
    print $fh "  path: ".$path."\n";

    print $fh "  sensorReadingType: ".$sensorReadingType."\n";
    print $fh "  serviceInterface: ".$serviceInterface."\n";
    print $fh "  readingType: ".$readingType."\n";
    print $fh "  sensorNamePattern: ".$sensorNamePattern."\n";
    print $fh "  interfaces:"."\n";

    my $interfaces = $sensorTypeConfig->{$sensorName}->{"interfaces"};
    #Walk over all the interfces as it needs to be written
    while (my ($interface,$properties) = each %{$interfaces}) {
        print $fh "    ".$interface.":\n";
        #walk over all the properties as it needs to be written
        while (my ($dbusProperty,$dbusPropertyValue) = each %{$properties}) {
                    #will write property named "Property" first then
                    #other properties.
            print $fh "      ".$dbusProperty.":\n";
            while (my ($condition,$offsets) = each %{$dbusPropertyValue}) {
                print $fh "          $condition:\n";
                while (my ($offset,$values) = each %{$offsets}) {
                    print $fh "            $offset:\n";
                    while (my ($key,$value) = each %{$values})  {
                        print $fh "              $key: ". $value."\n";
                    }
                }
            }
        }
    }
}

# Convert MRW OCC inventory path to application d-bus path
sub checkOccPathFixup
{
    my ($path) = @_;
    if ("/system/chassis/motherboard/cpu0/occ" eq $path) {
        return "/org/open_power/control/occ0";
    }
    if ("/system/chassis/motherboard/cpu1/occ" eq $path) {
        return "/org/open_power/control/occ1";
    }
    return $path;
}

# Usage
sub printUsage
{
    print "
    $0 -i [MRW filename] -m [SensorMetaData filename] -o [Output filename] [OPTIONS]
Options:
    -d = debug mode
        \n";
    exit(1);
}

# Helper function to put debug statements.
sub printDebug
{
    my $str = shift;
    print "DEBUG: ", $str, "\n" if $debug;
}
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