template_defs.php 59.5 KB
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<?php
#
# EMULAB-COPYRIGHT
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# Copyright (c) 2006, 2007 University of Utah and the Flux Group.
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# All rights reserved.
#
#
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# The template class is really just a wrapper around the DB data, plus
# some access routines and printing functions. 
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#
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class Template
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{
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    var	$template;
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    var $experiment;
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    function Template($guid, $vers) {
	$guid = addslashes($guid);
	$vers = addslashes($vers);
	
	$query_result =
	    DBQueryWarn("select * from experiment_templates ".
			"where guid='$guid' and vers='$vers'");
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	if (!$query_result || !mysql_num_rows($query_result)) {
	    $this->template = NULL;
	    return;
	}
	$this->template = mysql_fetch_array($query_result);
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	# 
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	# Underlying experiment for easy access.
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	#
	$pid = $this->pid();
	$eid = $this->eid();

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	if (! ($experiment = Experiment::LookupByPidEid($pid, $eid))) {
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	    $this->template = NULL;
	    return;
	}
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	$this->experiment = $experiment;
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    }

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    # Hmm, how does one cause an error in a php constructor?
    function IsValid() {
	return !is_null($this->template);
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    }
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    # Do class level lookup.
    function Lookup($guid, $vers) {
	$foo = new Template($guid, $vers);
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	if ($foo->IsValid())
	    return $foo;
	return null;
    }
    # Do class level lookup for the root template.
    function LookupRoot($guid) {
	$foo = new Template($guid, 1); 
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	if ($foo->IsValid())
	    return $foo;
	return null;
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    }
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    # Look up by pid,eid is which also unique across templates.
    function LookupbyEid($pid, $eid) {
	$query_result =
	    DBQueryWarn("select guid,vers from experiment_templates  ".
			"where pid='$pid' and eid='$eid'");

	if (!$query_result || !mysql_num_rows($query_result))
	    return null;
	
	$row = mysql_fetch_array($query_result);
	$guid = $row['guid'];
	$vers = $row['vers'];
	
	$foo = new Template($guid, $vers); 

	if ($foo->IsValid())
	    return $foo;
	return null;
    }
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    #
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    # Refresh a template instance by reloading from the DB.
    #
    function Refresh() {
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	if (! $this->IsValid())
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	    return -1;
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	$guid = $this->guid();
	$vers = $this->vers();
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	$query_result =
	    DBQueryWarn("select * from experiment_templates ".
			"where guid='$guid' and vers='$vers'");

	if (!$query_result || !mysql_num_rows($query_result)) {
	    $this->template = NULL;
	    return -1;
	}
	$this->template = mysql_fetch_array($query_result);
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	return 0;
    }

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    # accessors
    function guid() {
	return (is_null($this->template) ? -1 : $this->template['guid']);
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    }
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    function vers() {
	return (is_null($this->template) ? -1 : $this->template['vers']);
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    }
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    function pid() {
	return (is_null($this->template) ? -1 : $this->template['pid']);
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    }
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    function gid() {
	return (is_null($this->template) ? -1 : $this->template['gid']);
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    }
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    function eid() {
	return (is_null($this->template) ? -1 : $this->template['eid']);
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    }
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    function tid() {
	return (is_null($this->template) ? -1 : $this->template['tid']);
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    }
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    function uid() {
	return (is_null($this->template) ? -1 : $this->template['uid']);
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    }
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    function path() {
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	if (!$this->experiment)
	    return -1;
	$experiment = $this->experiment;
	return $experiment->path();
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    }
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    function IsHidden() {
	return (is_null($this->template) ? -1 : $this->template['hidden']);
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    }
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    function IsActive() {
	return (is_null($this->template) ? -1 : $this->template['active']);
    }
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    function created() {
	return (is_null($this->template) ? -1 : $this->template['created']);
    }
    function description() {
	return (is_null($this->template) ? -1 :
		$this->template['description']);
    }
    function parent_guid() {
	return (is_null($this->template) ? -1 :$this->template['parent_guid']);
    }
    function parent_vers() {
	return (is_null($this->template) ? -1 :$this->template['parent_vers']);
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    }
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    function child_vers() {
	return (is_null($this->template) ? -1 :$this->template['child_vers']);
    }
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    # The root template has no parent guid.
    function IsRoot() {
	if (is_null($this->template))
	    return -1;
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	return is_null($this->template['parent_guid']);
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    }

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    # Return the underlying experiment for this template.
    function GetExperiment() {
	return $this->experiment;
    }

    # Return the unixgid for operating on this template.
    function UnixGID() {
	$experiment = $this->experiment;

	return $experiment->UnixGID();
    }

    function AccessCheck($user, $access_type) {
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	global $TB_EXPT_READINFO;
	global $TB_EXPT_MODIFY;
	global $TB_EXPT_DESTROY;
	global $TB_EXPT_UPDATE;
	global $TB_EXPT_MIN;
	global $TB_EXPT_MAX;
	global $TBDB_TRUST_USER;
	global $TBDB_TRUST_LOCALROOT;
	global $TBDB_TRUST_GROUPROOT;
	global $TBDB_TRUST_PROJROOT;
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	$mintrust = $TB_EXPT_READINFO;
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	if ($access_type < $TB_EXPT_MIN ||
	    $access_type > $TB_EXPT_MAX) {
	    TBERROR("Invalid access type: $access_type!", 1);
	}
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        #
        # Admins do whatever they want!
        # 
	if (ISADMIN()) {
	    return 1;
	}
	$pid = $this->pid();
	$gid = $this->gid();
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	$uid = $user->uid();
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	if ($access_type == $TB_EXPT_READINFO) {
	    $mintrust = $TBDB_TRUST_USER;
	}
	else {
	    $mintrust = $TBDB_TRUST_LOCALROOT;
	}

        #
        # Either proper permission in the group, or group_root in the project.
        # This lets group_roots muck with other peoples experiments, including
        # those in groups they do not belong to.
        #
	return TBMinTrust(TBGrpTrust($uid, $pid, $gid), $mintrust) ||
	    TBMinTrust(TBGrpTrust($uid, $pid, $pid), $TBDB_TRUST_GROUPROOT);
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    }
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    #
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    # Display a template in its own table.
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    #
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    function Show() {
	$guid        = $this->guid();
	$vers        = $this->vers();
	$pid         = $this->pid();
	$gid         = $this->gid();
	$uid         = $this->uid();
	$tid         = $this->tid();
	$created     = $this->created();
	$description = $this->description();
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	$path        = $this->path();
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	if (! ($user = User::Lookup($uid))) {
	    TBERROR("Could not lookup object for user $uid", 1);
	}
	$showuser_url = CreateURL("showuser", $user);
	
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        #
        # We need the metadata guid/version for the TID and description since
        # they are mungable metadata.
        #
	$tid_metadata  = $this->LookupMetadataByName("TID");
	$desc_metadata = $this->LookupMetadataByName("description");
	
	if ($tid_metadata == NULL) {
	    TBERROR("Could not find Metadata 'TID' for $guid/$vers", 1);
	}
	if ($desc_metadata == NULL) {
	    TBERROR("Could not find Metadata 'description' for $guid/$vers",1);
	}
	$tid_guid  = $tid_metadata->guid();
	$tid_vers  = $tid_metadata->vers();
	$desc_guid = $desc_metadata->guid();
	$desc_vers = $desc_metadata->vers();
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        #
        # Generate the table.
        #
	echo "<center>
               <h3>Details</h3>
              </center>\n";

	echo "<table align=center cellpadding=2 cellspacing=2 border=1>\n";
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	ShowItem("GUID",
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		 MakeLink("template",
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			  "guid=$guid&version=$vers", "$guid/$vers"));
	
	ShowItem("ID",
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		 MakeAnchor(CreateURL("template_metadata", $this) .
			    "&action=modify".
			    "&metadata=${tid_guid}/${tid_vers}", $tid));
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	ShowItem("Project", MakeLink("project", "pid=$pid", $pid));
	ShowItem("Group",   $gid);
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	ShowItem("Creator", MakeAnchor($showuser_url, $uid));
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	ShowItem("Created", $created);
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	echo "<tr><td align=center colspan=2>Datastore Directory</td></tr>\n";
	echo "<tr><td align=center colspan=2>$path</td></tr>\n";

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	$onmouseover = MakeMouseOver($description);
	if (strlen($description) > 40) {
	    $description = substr($description, 0, 40) . " <b>... </b>";
	}
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	ShowItem("Description",
		 MakeAnchor(CreateURL("template_metadata", $this) .
			    "&action=modify".
			    "&metadata=${desc_guid}/${desc_vers}",
			    $description, $onmouseover));
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	if (! $this->IsRoot()) {
	    $parent_guid = $this->parent_guid();
	    $parent_vers = $this->parent_vers();
	    
	    ShowItem("Parent Template",
		     MakeLink("template",
			      "guid=$parent_guid&version=$parent_vers",
			      "$parent_guid/$parent_vers"));
	}
	echo "</table>\n";
    }

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    #
    # Page header; spit back some html for the typical page header.
    #
    function PageHeader() {
	$guid = $this->guid();
	$vers = $this->vers();
	$html = "<font size=+2>Template <b>" .
	    MakeLink("template",
		     "guid=$guid&version=$vers", "$guid/$vers") . 
	    "</b></font>";

	return $html;
    }

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    #
    # Display template parameters and default values in a table
    #
    function ShowParameters() {
	$guid = $this->guid();
	$vers = $this->vers();
	
	$query_result =
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	    DBQueryFatal("select p.name,p.value, ".
			 "       p.metadata_guid,p.metadata_vers, ".
			 "       m.value as description ".
			 "   from experiment_template_parameters as p ".
			 "left join experiment_template_metadata_items as m ".
			 "  on m.guid=p.metadata_guid and ".
			 "     m.vers=p.metadata_vers ".
			 "where p.parent_guid='$guid' and ".
			 "      p.parent_vers='$vers'");
    
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	if (!$query_result ||
	    !mysql_num_rows($query_result))
	    return 0;
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	echo "<center>
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               <h3>Parameters</h3>
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             </center> 
             <table align=center border=1 cellpadding=5 cellspacing=2>\n";

 	echo "<tr>
                <th>Name</th>
                <th>Default Value</th>
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                <th>Description</th>
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              </tr>\n";

	while ($row = mysql_fetch_array($query_result)) {
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	    $name	   = $row['name'];
	    $value	   = $row['value'];
	    $metadata_guid = $row['metadata_guid'];
	    $metadata_vers = $row['metadata_vers'];
	    $description   = $row['description'];
	    
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	    if (!isset($value)) {
		$value = "&nbsp";
	    }

	    echo "<tr>
                   <td>$name</td>
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                   <td>$value</td>";

	    if (is_null($description)) {
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		$url = CreateURL("template_metadata", $this);
		
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		echo "<td>".
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		     "<a href='${url}&action=add&".
		     "metadata_type=parameter_description&".
		     "formfields[name]=${name}'>Click to add</a></td>\n";
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	    }
	    else {
		$onmouseover = MakeMouseOver($description);
		if (strlen($description) > 30) {
		    $description =
			substr($description, 0, 30) . " <b>... </b>";
		}
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		$url = CreateURL("template_metadata", $this);
		
		echo "<td><a href='${url}&action=modify".
		     "&metadata=${metadata_guid}/${metadata_vers}' " .
		     "$onmouseover>$description</a></td>\n";
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	    }
	    echo "</tr>\n";
	    }
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	echo "</table>\n";
	return 1;
    }
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    #
    # Display template metadata and values in a table
    #
    function ShowMetadata() {
	$guid = $this->guid();
	$vers = $this->vers();
	
	$query_result =
	    DBQueryFatal("select i.* from experiment_template_metadata as m ".
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		     "left join experiment_template_metadata_items as i on ".
		     "     m.metadata_guid=i.guid and m.metadata_vers=i.vers ".
		     "where m.parent_guid='$guid' and ".
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		     "      m.parent_vers='$vers' and ".
		     "      m.internal=0 and m.hidden=0");
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	if (! mysql_num_rows($query_result))
	    return 0;
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	echo "<center>
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               <h3>Metadata</h3>
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             </center> 
             <table align=center border=1 cellpadding=5 cellspacing=2>\n";

 	echo "<tr>
                <th>Edit</th>
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                <th>Delete</th>
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                <th>Name</th>
                <th>Value</th>
              </tr>\n";

	while ($row = mysql_fetch_array($query_result)) {
	    $name	   = $row['name'];
	    $value	   = $row['value'];
	    $metadata_guid = $row['guid'];
	    $metadata_vers = $row['vers'];
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	    $onmouseover   = "";
	    
	    if (!isset($value) || $value == "") {
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		$value = "&nbsp";
	    }
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	    else {
		$onmouseover = MakeMouseOver($value);
		
		if (strlen($value) > 40) {
		    $value = substr($value, 0, 40) . "<b> ... </b></a>";
		}
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	    }
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	    $meta_url = CreateURL("template_metadata", $this) .
		"&metadata=${metadata_guid}/${metadata_vers}";
		
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	    echo "<tr>
   	           <td align=center>
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                     <a href='${meta_url}&action=modify'>
                       <img border=0 alt='modify' src='greenball.gif'></A></td>
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   	           <td align=center>
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                     <a href='${meta_url}&action=delete'>
                       <img border=0 alt='delete' src='redball.gif'></A></td>
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                   <td>$name</td>
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                   <td $onmouseover>$value</td>
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                  </tr>\n";
  	}
	echo "</table>\n";
	return 1;
    }

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    #
    # Show the instance list for a template.
    #
    function ShowInstances() {
	$guid = $this->guid();
	$vers = $this->vers();
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	$query_result =
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	    DBQueryFatal("select e.*,count(r.node_id) as nodes, ".
			 "    round(minimum_nodes+.1,0) as min_nodes ".
			 "from experiment_template_instances as i ".
			 "left join experiments as e on e.idx=i.exptidx ".
			 "left join reserved as r on e.pid=r.pid and ".
			 "     e.eid=r.eid ".
			 "where e.pid is not null and ".
			 "      (i.parent_guid='$guid' and ".
			 "       i.parent_vers='$vers') ".
			 "group by e.pid,e.eid order by e.state,e.eid");

	if (! mysql_num_rows($query_result))
	    return;
	
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	echo "<center>
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               <h3>Template Instances</h3>
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             </center> 
             <table align=center border=1 cellpadding=5 cellspacing=2>\n";

	echo "<tr>
               <th>EID</th>
               <th>State</th>
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               <th align=center>Nodes</th>
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              </tr>\n";

	$idlemark = "<b>*</b>";
	$stalemark = "<b>?</b>";
	
	while ($row = mysql_fetch_array($query_result)) {
	    $pid       = $row['pid'];
	    $eid       = $row['eid'];
	    $state     = $row['state'];
	    $nodes     = $row['nodes'];
	    $minnodes  = $row['min_nodes'];
	    $ignore    = $row['idle_ignore'];
	    $name      = $row['expt_name'];
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	    if (! ($experiment = Experiment::LookupByPidEid($pid, $eid))) {
		TBERROR("Could not map $pid/$eid to its object", 1);
	    }
	    $idlehours = $experiment->IdleTime();
	    $stale     = $experiment->IdleStale();
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	    if ($nodes == 0) {
		$nodes = "<font color=green>$minnodes</font>";
	    }
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	    elseif ($row["swap_requests"] > 0) {
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		$nodes .= $idlemark;
	    }

	    $idlestr = $idlehours;
	    
	    if ($idlehours > 0) {
		if ($stale) {
		    $idlestr .= $stalemark;
		}
		if ($ignore) {
		    $idlestr = "($idlestr)";
		}
	    }
	    elseif ($idlehours == -1) {
		$idlestr = "&nbsp;";
	    }
	    
	    echo "<tr>
                   <td><A href='showexp.php3?pid=$pid&eid=$eid'>$eid</A></td>
  		   <td>$state</td>
                   <td align=center>$nodes</td>
                 </tr>\n";
	}
	echo "</table>\n";
    }

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    #
    # Show the historical instance list for a template.
    #
    function ShowHistory($expand) {
	$guid = $this->guid();
	$vers = $this->vers();
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	$query_result =
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	    DBQueryFatal("select i.*,r.archive_tag ".
			 "  from experiment_template_instances as i ".
			 "left join experiment_stats as s on ".
			 "     s.exptidx=i.exptidx ".
			 "left join experiment_resources as r on ".
			 "     r.idx=s.rsrcidx ".
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			 "where (i.parent_guid='$guid' and ".
			 "       i.parent_vers='$vers') ".
			 "order by i.start_time");

	if (! mysql_num_rows($query_result))
	    return 0;
	
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	echo "<center>
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               <h3>Template History (Swapins)</h3>
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             </center> 
             <table align=center border=1 cellpadding=5 cellspacing=2>\n";

	echo "<tr>
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               <th align=center>Expand</th>
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               <th>EID</th>
               <th>UID</th>
               <th>Start Time</th>
               <th>Stop Time</th>
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               <th align=center>Show</th>
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               <th align=center>Archive</th>
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               <th align=center>Export</th>
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               <th align=center>Replay</th>
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               <th align=center>Load DBs</th>
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              </tr>\n";

	$idlemark = "<b>*</b>";
	$stalemark = "<b>?</b>";
	
	while ($row = mysql_fetch_array($query_result)) {
	    $pid       = $row['pid'];
	    $eid       = $row['eid'];
	    $uid       = $row['uid'];
	    $start     = $row['start_time'];
	    $stop      = $row['stop_time'];
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	    $exptidx   = $row['exptidx'];
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	    $idx       = $row['idx'];
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	    $tag       = $row['archive_tag'];
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	    if (! isset($stop)) {
		$stop = "&nbsp";
	    }
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	    $expandit = ((isset($expand) && $expand == $idx) ? 1 : 0);
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	    echo "<tr>\n";
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	    echo " <td align=center>";
	    if ($expandit) {
		echo "<a href=template_history.php".
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                         "?guid=$guid&version=$vers>".
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		         "<img border=0 alt='c' src='/icons/down.png'></a>\n";
	    }
	    else {
 		echo "<a href=template_history.php".
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                         "?guid=$guid&version=$vers&expand=$idx#$idx>".
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		         "<img border=0 alt='e' src='/icons/right.png'></a>\n";
	    }
	    echo " </td>
                   <td>$eid</td>\n";
	    
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	    echo " <td>$uid</td>
                   <td>$start</td>
                   <td>$stop</td>\n";

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	    echo " <td align=center>".
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		    MakeLink("instance", "instance=$exptidx",
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			     "<img border=0 alt='Show' src='greenball.gif'>");
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	    echo " </td>\n";
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 	    echo " <td align=center>
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                     <a href=archive_view.php3/$exptidx/history/$tag/".
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		        "?instance=$exptidx>
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                     <img border=0 alt='i' src='greenball.gif'></a></td>";
	    
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	    echo " <td align=center>".
 		    MakeLink("export",
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			     "instance=$exptidx",
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			     "<img border=0 alt='Show' src='greenball.gif'>");
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	    echo " <td align=center>".
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 		    MakeLink("swapin",
			     "guid=$guid&version=$vers".
			     "&replay_instance_idx=$exptidx",
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			     "<img border=0 alt='Show' src='greenball.gif'>");
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	    echo " <td align=center>".
 		    MakeLink("analyze",
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			     "instance=$exptidx",
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			     "<img border=0 alt='Show' src='greenball.gif'>");
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	    echo " </td>
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                 </tr>\n";
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	    if ($expandit) {
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		$instance = new TemplateInstance($exptidx);
		
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		echo "<tr>\n";
		echo " <a NAME=$idx></a>\n";
		echo "<td>&nbsp</td>\n";
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		echo " <td colspan=7>\n";
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		$instance->ShowRunList(0);
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		echo " </td>\n";
		echo "</tr>\n";
	    }
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	}
	echo "</table>\n";
    }
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    #
    # Dump the image map for a template to the output.
    #
    function ShowGraph() {
	$guid = $this->guid();
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	$vers = $this->vers();
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	# Make the link unique to force reload on the client side.
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	$now  = time();
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	$query_result =
	    DBQueryFatal("select imap from experiment_template_graphs ".
			 "where parent_guid='$guid'");

	if (!mysql_num_rows($query_result)) {
	    USERERROR("Experiment Template $guid is no longer in the DB!", 1);
	}
	$row  = mysql_fetch_array($query_result);
	$imap = $row['imap'];

	echo "<center>";
	echo "<div id=fee style='display: block; overflow: hidden; ".
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	    "position: relative; z-index:1010; height: 400px; ".
	    "width: 700px; border: 2px solid black;'>\n";
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	echo "<div id=\"mygraphdiv\" style='position:relative;'>\n";
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	echo "<div id='CurrentTemplate' style='display: block; opacity: 1; ".
	    "visibility: hidden; ".
	    "position: absolute; z-index:1020; left: 0px; top: 0px;".
	    "height: 0px; width: 0px; border: 2px solid red;'></div>\n";

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	echo $imap;
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	echo "<img id=\"mygraphimg\" border=0 usemap=\"#TemplateGraph\" ";
	echo "      onLoad=\"setTimeout('ShowGraphInit();', 10);\" ";
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	echo "      style='cursor: move;' ";
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	echo "      src='template_graph.php?guid=$guid&version=1&now=$now'>\n";
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	echo "</div>\n";
	echo "</div>\n";
    }

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    #
    # Dump the NS file into its own iframe.
    #
    function ShowNS() {
	$guid = $this->guid();
	$vers = $this->vers();

	echo "<center>";
	echo "<iframe width=700 height=400 scrolling=auto
                      src='spitnsdata.php3?guid=$guid&version=$vers'
                      border=2></iframe>\n";
	echo "</center>";
    }

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    #
    # Dump the visualization into its own iframe.
    #
    function ShowVis($zoom = 1.25, $detail = 1) {
	$guid = $this->guid();
	$pid  = $this->pid();
	$eid  = $this->eid();
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	# Make the link unique to force reload on the client side.
	$now  = time();
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	echo "<center>";
	echo "<div id=fee style='display: block; overflow: hidden; ".
	    "position: relative; z-index:1010; height: 400px; ".
	    "width: 700px; border: 2px solid black;'>\n";
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	echo "<div id=\"myvisdiv\" style='position:relative;'>\n";
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	echo "<img id=\"myvizimg\" border=0 style='cursor: move;' ";
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	echo "      onLoad=\"setTimeout('ShowVisInit();', 100);\" ";
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	echo "      src='top2image.php3?pid=$pid&eid=$eid".
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	    "&zoom=$zoom&detail=$detail&now=$now'>\n";
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	echo "</div>\n";
	echo "</div>\n";
    }

    #
    # Grab the zoom and detail for the current viz picture, as a default.
    #
    function CurrentVisDetails() {
	$pid = $this->pid();
	$eid = $this->eid();

	$query_result =
	    DBQueryFatal("select zoom,detail from vis_graphs ".
			 "where pid='$pid' and eid='$eid'");

	if (!mysql_num_rows($query_result)) {
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	    return array(1.25, 1);
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	}
	$row    = mysql_fetch_array($query_result);
	$zoom   = $row['zoom'];
	$detail = $row['detail'];
	return array($zoom, $detail);
    }

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    #
    # Grab array of input files for a template, indexed by input_idx.
    #
    function InputFiles() {
	$guid = $this->guid();
	$vers = $this->vers();
	
	$input_list = array();

	$query_result =
	    DBQueryFatal("select * from experiment_template_inputs ".
			 "where parent_guid='$guid' and parent_vers='$vers'");

	while ($row = mysql_fetch_array($query_result)) {
	    $input_idx = $row['input_idx'];

	    $input_query =
		DBQueryFatal("select input ".
			     "  from experiment_template_input_data ".
			     "where idx='$input_idx'");

	    $input_row = mysql_fetch_array($input_query);
	    $input_list[] = $input_row['input'];
	}
	return $input_list;
    }

    #
    # Return number of parameters.
    #
    function ParameterCount() {
	$guid = $this->guid();
	$vers = $this->vers();
	
	$query_result =
	    DBQueryFatal("select name,value ".
			 "   from experiment_template_parameters ".
			 "where parent_guid='$guid' and ".
			 "      parent_vers='$vers'");

	return mysql_num_rows($query_result);
    }

    #
    # Return number of metadata items
    #
    function MetadataCount() {
	$guid = $this->guid();
	$vers = $this->vers();

	$query_result =
	    DBQueryFatal("select internal ".
			 "  from experiment_template_metadata as m ".
			 "where m.parent_guid='$guid' and ".
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			 "      m.parent_vers='$vers' and ".
			 "      m.internal=0 and m.hidden=0");
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	return mysql_num_rows($query_result);
    }

    #
    # Return number of instances
    #
    function InstanceCount() {
	$guid = $this->guid();
	$vers = $this->vers();

	$query_result =
	    DBQueryFatal("select * from experiment_template_instances as i ".
			 "where (i.parent_guid='$guid' and ".
			 "       i.parent_vers='$vers')");

	return mysql_num_rows($query_result);
    }

    #
    # Look for a metadata item in a template, by the guid/vers of the
    # metadata. Returns a class instance (see below).
    #
    function LookupMetadataByGUID($metadata_guid, $metadata_vers) {
	return TemplateMetadata::TemplateLookupByGUID($this,
						      $metadata_guid,
						      $metadata_vers);
    }
    # Ditto by name,
    function LookupMetadataByName($metadata_name) {
	return TemplateMetadata::TemplateLookupByName($this, $metadata_name);
    }

    # Grab the graph data.
    function GraphImage(&$image) {
	$guid = $this->guid();

	$query_result =
	    DBQueryWarn("select image from experiment_template_graphs ".
			"where parent_guid='$guid'");

	if (!$query_result || !mysql_num_rows($query_result)) {
	    return -1;
	}
	$row   = mysql_fetch_array($query_result);
	$image = $row['image'];
	return 0;
    }

    #
    # Return an array of the formal parameters for a template.
    #
    function FormalParameters(&$parameters) {
	$parameters = array();
	$guid = $this->guid();
	$vers = $this->vers();
	
	$query_result =
	    DBQueryFatal("select name,value ".
			 "   from experiment_template_parameters ".
			 "where parent_guid='$guid' and ".
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			 "      parent_vers='$vers' ".
			 "order by name");
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	while ($row = mysql_fetch_array($query_result)) {
	    $name	= $row['name'];
	    $value	= $row['value'];

	    $parameters[$name] = $value;
	}
	return 0;
    }
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    #
    # Return an array of the formal parameters for a template.
    #
    function FormalParameterMouseOvers(&$mouseovers) {
	$mouseovers = array();
	$guid = $this->guid();
	$vers = $this->vers();
	
	$query_result =
	    DBQueryFatal("select p.name,m.value as description ".
			 "   from experiment_template_parameters as p ".
			 "left join experiment_template_metadata_items as m ".
			 "  on m.guid=p.metadata_guid and ".
			 "     m.vers=p.metadata_vers ".
			 "where p.parent_guid='$guid' and ".
			 "      p.parent_vers='$vers'");
    
	while ($row = mysql_fetch_array($query_result)) {
	    $name	 = $row['name'];
	    $description = $row['description'];

	    if (isset($description) && $description != "") {
		$mouseovers[$name] = MakeMouseOver($description);
	    }
	}
	return 0;
    }

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    #
    # Find next candidate for a template (modify) TID
    #
    function NextTID() {
	$tid  = $this->tid();
	$guid = $this->guid();

	$query_result =
	    DBQueryFatal("select MAX(vers) from experiment_templates ".
			 "where guid='$guid'");

	if (mysql_num_rows($query_result) == 0) {
	    return "T" . substr(md5(uniqid($foo, true)), 0, 10);
	}
	$row = mysql_fetch_array($query_result);
	$foo = $row[0] + 1;
	return "${tid}-V${foo}"; 
    }
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    #
    # Return array of template events, ordered by time.
    #
    function EventList(&$eventlist) {
	$eventlist = array();
	$guid = $this->guid();
	$vers = $this->vers();
	
	$query_result =
	    DBQueryFatal("select * from experiment_template_events ".
			 "where parent_guid='$guid' and ".
			 "      parent_vers='$vers' ".
			 "order by time");

	$i = 0;
	while ($row = mysql_fetch_array($query_result)) {
	    $eventlist[$i++] = $row;
	}
	return 0;
    }
    function EventCount() {
	$guid = $this->guid();
	$vers = $this->vers();
	
	$query_result =
	    DBQueryFatal("select count(*) from experiment_template_events ".
			 "where parent_guid='$guid' and ".
			 "      parent_vers='$vers' ");

	$row   = mysql_fetch_array($query_result);
	$count = $row[0];
	return $count;
    }
    function DeleteEvent($vname) {
	$guid = $this->guid();
	$vers = $this->vers();
	
	DBQueryFatal("delete from experiment_template_events ".
		     "where parent_guid='$guid' and ".
		     "      parent_vers='$vers' and ".
		     "      vname='$vname'");

	return 0;
    }
    function ModifyEvent($vname, $changes) {
	$guid = $this->guid();
	$vers = $this->vers();
	$sets = array();
	
	while (list ($key, $value) = each ($changes)) {
	    $value  = addslashes($value);
	    $sets[] = "$key='$value'";
	}
	
	DBQueryFatal("update experiment_template_events set ".
		     implode(",", $sets) . " ".
		     "where parent_guid='$guid' and ".
		     "      parent_vers='$vers' and ".
		     "      vname='$vname'");

	return 0;
    }
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}

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#
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# This is the class for a template instance (swapin).
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#
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class TemplateInstance
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{
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    var	$template;
    var $instance;
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    var $experiment;
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    #
    # Instances are found by their experiment index. 
    #
    function TemplateInstance($exptidx) {
	$exptidx = addslashes($exptidx);

	$query_result =
	    DBQueryFatal("select * ".
			 "  from experiment_template_instances ".
			 "where exptidx='$exptidx'");
	
	if (!$query_result || !mysql_num_rows($query_result)) {
	    $this->template = NULL;
	    $this->instance = NULL;
	    return;
	}
	$this->instance = mysql_fetch_array($query_result);
	$this->template = new Template($this->instance['parent_guid'],
				       $this->instance['parent_vers']);
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	$this->experiment = Experiment::Lookup($exptidx);
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    }
    
    # Hmm, how does one cause an error in a php constructor?
    function IsValid() {
	return !is_null($this->instance);
    }

    # Do class level lookup.
    function LookupByExptidx($exptidx) {
	$foo = new TemplateInstance($exptidx);

	if ($foo->IsValid())
	    return $foo;
	return null;
    }

    # accessors
    function idx() {
	return (is_null($this->instance) ? -1 : $this->instance['idx']);
    }
    function exptidx() {
	return (is_null($this->instance) ? -1 : $this->instance['exptidx']);
    }
    function runidx() {
	return (is_null($this->instance) ? -1 : $this->instance['runidx']);
    }
    function pid() {
	return (is_null($this->instance) ? -1 : $this->instance['pid']);
    }
    function eid() {
	return (is_null($this->instance) ? -1 : $this->instance['eid']);
    }
    function uid() {
	return (is_null($this->instance) ? -1 : $this->instance['uid']);
    }
    function guid() {
	return (is_null($this->instance) ? -1 :
		$this->instance['parent_guid']);
    }
    function vers() {
	return (is_null($this->instance) ? -1 :
		$this->instance['parent_vers']);
    }
    function start_time() {
	return (is_null($this->instance) ? -1 :
		$this->instance['start_time']);
    }
    function stop_time() {
	return (is_null($this->instance) ? -1 :
		$this->instance['stop_time']);
    }
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    function pause_time() {
	return (is_null($this->instance) ? -1 :
		$this->instance['pause_time']);
    }
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    function template() {
	return (is_null($this->instance) ? -1 : $this->template);
    }
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    function GetTemplate() {
	return $this->template;
    }
    function GetExperiment() {
	return $this->experiment;
    }

    #
    # Load the project object for an experiment.
    #
    function Project() {
	$pid = $this->pid();

	if (! ($project = Project::Lookup($pid))) {
	    TBERROR("Could not lookup project $pid!", 1);
	}
	return $project;
    }
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    # Is instance actually running (current experiment).
    function Instantiated() {
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	return ($this->experiment ? 1 : 0);
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    }

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    #
    # Show an instance.
    #
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    function Show($detailed, $withanno = 0) {
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	$exptidx = $this->exptidx();
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	$runidx  = $this->runidx();
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	$guid    = $this->guid();
	$vers    = $this->vers();
	$pid     = $this->pid();
	$uid     = $this->uid();
	$start   = $this->start_time();
	$stop    = $this->stop_time();
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	$template= $this->template();
	$pcount  = $template->ParameterCount();

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	if (! ($user = User::Lookup($uid))) {
	    TBERROR("Could not lookup object for user $uid", 1);
	}
	$showuser_url = CreateURL("showuser", $user);
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	# If the instance is swapped in, we can provide a link to
	# experiment.
	if ($this->experiment) {
	    $showexp_url  = CreateURL("showexp", $this->experiment);
	}
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	echo "<center>\n";
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	if ($detailed && $pcount) {
	    echo "<table border=0 bgcolor=#000 color=#000 class=stealth ".
		 " cellpadding=0 cellspacing=0 align=center>\n";
            echo "<tr valign=top>";
	    echo "<td class=stealth align=center>\n";
	}
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	echo "<center>
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               <h3>Instance Details</h3>
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             </center>\n";

	echo "<table align=center cellpadding=2 cellspacing=2 border=1>\n";
    
	ShowItem("Template",
		 MakeLink("template",
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			  "guid=$guid&version=$vers", "$guid/$vers"));
	ShowItem("ID",          $exptidx);
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	if ($this->experiment) {
	    ShowItem("Experiment",  MakeAnchor($showexp_url, $this->eid()));
	}
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	ShowItem("Project",     MakeLink("project", "pid=$pid", $pid));
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	ShowItem("Creator",     MakeAnchor($showuser_url, $uid));
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	ShowItem("Started",     $start);
	ShowItem("Stopped",     (isset($stop) ? $stop : "&nbsp"));
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	ShowItem("Current Run", (isset($runidx) ? $runidx : "&nbsp"));
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	echo "</table>\n";

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	if ($detailed && $pcount) {
	    echo "</td>";
	    echo "<td align=center class=stealth> &nbsp &nbsp &nbsp </td>\n";
	    echo "<td class=stealth align=center>\n";
	    $this->ShowBindings();
	    echo "</tr>";
	    echo "</table>\n";
	}
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	if ($withanno) {
	    $this->ShowAnnotation();
	}

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	if ($detailed) {
	    $this->ShowRunList(1);
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	}
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	echo "</center>\n";
	
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    }
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    #
    # Page header; spit back some html for the typical page header.
    #
    function PageHeader() {
	$template = $this->template();	
	$exptidx  = $this->exptidx();
	$html     = $template->PageHeader();
	$guid     = $this->guid();
	$vers     = $this->vers();
	$eid      = $this->eid();

	$html .= "<font size=+2>, Instance <b>" .
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	    "</b></font>";
	return $html;
    }

    #
    # A variant that points to the active experiment.
    #
    function ExpPageHeader() {
	$template = $this->template();	
	$html     = $template->PageHeader();
	$guid     = $this->guid();
	$vers     = $this->vers();
	$pid      = $this->pid();
	$eid      = $this->eid();

	$html .= "<font size=+2>, Instance <b>" .
	    MakeLink("project", "pid=$pid", $pid) . "/" .
	    MakeLink("experiment", "pid=$pid&eid=$eid", $eid) . 
	    "</b></font>";

	return $html;
    }
    
    #
    # Ditto for a run, although run should its own class.
    #
    function RunPageHeader($runidx) {
	$template = $this->template();	
	$exptidx  = $this->exptidx();
	$html     = $this->PageHeader();
	$guid     = $this->guid();
	$vers     = $this->vers();
	$eid      = $this->eid();
	$runid    = $this->GetRunID($runidx);

	$html .= "<font size=+2>, Run <b>" .
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	    MakeAnchor(CreateURL("experimentrun_show", $this,
				 "runidx", $runidx), $runid) .
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	    "</b></font>";
	return $html;
    }
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    #
    # Show the current bindings. This depends on the state of the instance.
    # If not swapped in, the instance bindings are current. If swapped in,
    # the most recent run bindings are current (current run, or last run).
    #
    function ShowCurrentBindings() {
	global $TB_EXPTSTATE_SWAPPED;
	
	if ($this->experiment) {
	    $experiment = $this->experiment;

	    if ($experiment->state() == $TB_EXPTSTATE_SWAPPED) {
		# Show the instance bindings is swapped.
		return $this->ShowBindings();
	    }
	    elseif ($this->runidx()) {
		return $this->ShowRunBindings();
	    }
	    return $this->ShowLastRunBindings();
	}
	return $this->ShowBindings();
    }
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    #
    # Display instance bindings in a table
    #
    function ShowBindings() {
	$instance_idx = $this->idx();
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	$query_result =
	    DBQueryWarn("select * from experiment_template_instance_bindings ".
			"where instance_idx='$instance_idx'");
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	if (!mysql_num_rows($query_result))
	    return 0;

	echo "<center>
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               <h3>Instance Bindings</h3>
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             </center> 
             <table align=center border=1 cellpadding=5 cellspacing=2>\n";

 	echo "<tr>
                <th>Name</th>
                <th>Value</th>
              </tr>\n";

	while ($row = mysql_fetch_array($query_result)) {
	    $name	= $row['name'];
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	    $value	= $row['value'];
	    if (!isset($value)) {
		$value = "&nbsp";
	    }

	    echo "<tr>
                   <td>$name</td>
                   <td>$value</td>
                  </tr>\n";
  	}
	echo "</table>\n";
	return 1;
    }

    #
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    # Display run bindings in a table
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    #
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    function ShowRunBindings($runidx = null) {
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	$exptidx      = $this->exptidx();

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	if (! $runidx) {
	    $runidx = $this->runidx();
	}
	
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	$query_result =
	    DBQueryWarn("select * from experiment_run_bindings ".
			 "where exptidx='$exptidx' and runidx='$runidx' ".
			 "order by name");

	if (!mysql_num_rows($query_result))
	    return 0;

	echo "<center>
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               <h3>Run Bindings</h3>
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             </center> 
             <table align=center border=1 cellpadding=5 cellspacing=2>\n";

 	echo "<tr>
                <th>Name</th>
                <th>Value</th>
              </tr>\n";

	while ($row = mysql_fetch_array($query_result)) {
	    $name	= $row['name'];
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	    $value	= $row['value'];
	    if (!isset($value)) {
		$value = "&nbsp";
	    }

	    echo "<tr>
                   <td>$name</td>
                   <td>$value</td>
                  </tr>\n";
  	}
	echo "</table>\n";
	return 1;
    }

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    #
    # Display last run bindings in a table
    #
    function ShowLastRunBindings() {
	return $this->ShowRunBindings($this->LastRunIdx());
    }

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    #
    # Show the run list for an instance.
    #
    function ShowRunList($withheader) {
	$exptidx = $this->exptidx();
	$guid    = $this->guid();
	$vers    = $this->vers();
	
	$query_result =
	    DBQueryFatal("select * from experiment_runs ".
			 "where exptidx='$exptidx'");
	
	if (! mysql_num_rows($query_result))
	    return 0;
	
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	if ($withheader) {
	    echo "<center>
                    <h3>Instance History (Runs)</h3>
                  </center> \n";
	}
	echo "<table align=center border=1 cellpadding=5 cellspacing=2>\n";

	echo "<tr>
               <th>RunID</th>
               <th>ID</th>
               <th>Start Time</th>
               <th>Stop Time</th>
               <th>Description</th>
              </tr>\n";

	while ($rrow = mysql_fetch_array($query_result)) {
	    $runidx    = $rrow['idx'];
	    $runid     = $rrow['runid'];
	    $start     = $rrow['start_time'];
	    $stop      = $rrow['stop_time'];
	    $exptidx   = $rrow['exptidx'];
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	    $start_tag = $rrow['starting_archive_tag'];
	    $end_tag   = $rrow['ending_archive_tag'];
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	    $description = $rrow['description'];
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	    $onmouseover = "";
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	    if (! isset($stop)) {
		$stop = "&nbsp";
	    }
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	    if (isset($description) && $description != "") {
		$onmouseover = MakeMouseOver($description);
		if (strlen($description) > 30) {
		    $description = substr($description, 0, 30) . " <b>...</b>";
		}
	    }
	    else {
		$description = "&nbsp ";
	    }

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	    if (isset($end_tag) && $end_tag != "") {
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		$archive_link =
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		    "<a href=archive_view.php3".
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		    "/$exptidx/history/$end_tag/?instance=$exptidx>".
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		    "<img border=0 alt='i' src='greenball.gif'></a>";
	    }
	    else {
		$archive_link = "&nbsp ";
	    }
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	    echo "<tr>\n";
	    echo " <td align=center>".
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		MakeAnchor(CreateURL("experimentrun_show", $this,
				     "runidx", $runidx), "$runid");
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	    echo " </td>
  		    <td>$runidx</td>
                    <td>$start</td>
                    <td>$stop</td>
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                    <td $onmouseover>$description</td>
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                   </tr>\n";
	}
	echo "</table>\n";
    }

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