html_form_template.php

<?php
/*
 +-------------------------------------------------------------------------+
 | Copyright (C) 2004-2024 The Cacti Group                                 |
 |                                                                         |
 | This program is free software; you can redistribute it and/or           |
 | modify it under the terms of the GNU General Public License             |
 | as published by the Free Software Foundation; either version 2          |
 | of the License, or (at your option) any later version.                  |
 |                                                                         |
 | This program is distributed in the hope that it will be useful,         |
 | but WITHOUT ANY WARRANTY; without even the implied warranty of          |
 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           |
 | GNU General Public License for more details.                            |
 +-------------------------------------------------------------------------+
 | Cacti: The Complete RRDtool-based Graphing Solution                     |
 +-------------------------------------------------------------------------+
 | This code is designed, written, and maintained by the Cacti Group. See  |
 | about.php and/or the AUTHORS file for specific developer information.   |
 +-------------------------------------------------------------------------+
 | http://www.cacti.net/                                                   |
 +-------------------------------------------------------------------------+
*/

/* draw_nontemplated_fields_graph - draws a form that consists of all non-templated graph fields associated
	 with a particular graph template
   @arg $graph_template_id - the id of the graph template to base the form after
   @arg $values_array - any values that should be included by default on the form
   @arg $field_name_format - all fields on the form will be named using the following format, the following
	 variables can be used:
	   |field| - the current field name
   @arg $header_title - the title to use on the header for this form
   @arg $alternate_colors (bool) - whether to alternate colors for each row on the form or not
   @arg $include_hidden_fields (bool) - should elements that are not to be displayed be represented as hidden
	 html input elements or omitted altogether?
   @arg $snmp_query_graph_id - if this graph template is part of a data query, specify the graph id here. this
	 will be used to determine if a given field is using suggested values */
function draw_nontemplated_fields_graph($graph_template_id, &$values_array, $field_name_format = '|field|', $header_title = '', $alternate_colors = true, $include_hidden_fields = true, $snmp_query_graph_id = 0) {
	global $struct_graph;

	$form_array       = array();
	$draw_any_items   = false;
	$num_fields_drawn = 0;

	/* fetch information about the graph template */
	$graph_template = db_fetch_row_prepared('SELECT *
		FROM graph_templates_graph
		WHERE graph_template_id = ?
		AND local_graph_id = 0',
		array($graph_template_id));

	foreach ($struct_graph as $field_name => $field_array) {
		/* find our field name */
		$form_field_name = str_replace('|field|', $field_name, $field_name_format);

		$form_array += array($form_field_name => $struct_graph[$field_name]);

		/* modifications to the default form array */
		$form_array[$form_field_name]['value']   = (isset($values_array[$field_name]) ? $values_array[$field_name] : '');
		$form_array[$form_field_name]['form_id'] = (isset($values_array['id']) ? $values_array['id'] : '0');
		unset($form_array[$form_field_name]['default']);

		if ($field_array['method'] == 'spacer') {
			unset($form_array[$form_field_name]);
		} elseif (isset($graph_template['t_' . $field_name]) && $graph_template['t_' . $field_name] != 'on') {
			if ($include_hidden_fields == true) {
				$form_array[$form_field_name]['method'] = 'hidden';
			} else {
				unset($form_array[$form_field_name]);
			}
		} elseif ((!empty($snmp_query_graph_id)) && (cacti_sizeof(db_fetch_assoc_prepared('SELECT id FROM snmp_query_graph_sv WHERE snmp_query_graph_id = ? AND field_name = ?', array($snmp_query_graph_id, $field_name))) > 0)) {
			if ($include_hidden_fields == true) {
				$form_array[$form_field_name]['method'] = 'hidden';
			} else {
				unset($form_array[$form_field_name]);
			}
		} else {
			if ($draw_any_items == false && $header_title != '') {
				print "<div class='tableHeader'><div class='tableSubHeaderColumn'>$header_title</div></div>";
			}

			$draw_any_items = true;
			$num_fields_drawn++;
		}
	}

	/* setup form options */
	if ($alternate_colors == true) {
		$form_config_array = array('no_form_tag' => true);
	} else {
		$form_config_array = array('no_form_tag' => true, 'force_row_color' => true);
	}

	if (cacti_sizeof($form_array)) {
		draw_edit_form(
			array(
				'config' => $form_config_array,
				'fields' => $form_array
			)
		);
	}

	return $num_fields_drawn;
}

/* draw_nontemplated_fields_graph_item - draws a form that consists of all non-templated graph item fields
	 associated with a particular graph template
   @arg $graph_template_id - the id of the graph template to base the form after
   @arg $local_graph_id - specify the id of the associated graph if it exists
   @arg $field_name_format - all fields on the form will be named using the following format, the following
	 variables can be used:
	   |field| - the current field name
	   |id| - the current graph input id
   @arg $header_title - the title to use on the header for this form
   @arg $alternate_colors (bool) - whether to alternate colors for each row on the form or not */
function draw_nontemplated_fields_graph_item($graph_template_id, $local_graph_id, $field_name_format = '|field|_|id|', $header_title = '', $alternate_colors = true, $locked = 'false') {
	global $struct_graph_item;

	$draw_any_items   = false;
	$num_fields_drawn = 0;

	/* fetch information about the graph template */
	$input_item_list = db_fetch_assoc_prepared('SELECT *
		FROM graph_template_input
		WHERE graph_template_id = ?
		ORDER BY column_name, name',
		array($graph_template_id));

	/* modifications to the default graph items array */
	if (!empty($local_graph_id)) {
		$host_id = db_fetch_cell_prepared('SELECT host_id
			FROM graph_local
			WHERE id = ?',
			array($local_graph_id));

		if (get_selected_theme() != 'classic') {
			$struct_graph_item['task_item_id']['method'] = 'drop_callback';
			$struct_graph_item['task_item_id']['action'] = 'ajax_get_graphitem';
		}

		$struct_graph_item['task_item_id']['sql'] = "SELECT
			CONCAT_WS('',
			CASE
			WHEN host.description IS NULL THEN 'No Device - '
			WHEN host.description IS NOT NULL THEN ''
			END,
			data_template_data.name_cache,' (',data_template_rrd.data_source_name,')') AS name,
			data_template_rrd.id
			FROM (data_template_data,data_template_rrd,data_local)
			LEFT JOIN host ON (data_local.host_id=host.id)
			WHERE data_template_rrd.local_data_id=data_local.id
			AND data_template_data.local_data_id=data_local.id
			" . (empty($host_id) ? '' : " AND data_local.host_id=$host_id") . '
			ORDER BY name';
	}

	if (cacti_sizeof($input_item_list)) {
		foreach ($input_item_list as $item) {
			if (!db_column_exists('graph_templates_item', $item['column_name'])) {
				raise_message_javascript(
					__('Attempted SQL Injection'),
					__('There was a SQL Injection attempted on the page'),
					__('A client attempted to create a SQL Injection into Cacti likely from an external host with the address %s', get_client_addr())
				);

				cacti_log(sprintf('ERROR: A client attempted to create a SQL Injection into Cacti likely from an external host with the address %s', get_client_addr()), false, 'SECURITY');

				exit;
			}

			$form_array = array();

			if (!empty($local_graph_id)) {
				$current_def_value = db_fetch_row_prepared('SELECT gti.' . $item['column_name'] . ', gti.id
					FROM graph_templates_item AS gti
					INNER JOIN graph_template_input_defs AS gtid
					ON gtid.graph_template_item_id=gti.local_graph_template_item_id
					WHERE gtid.graph_template_input_id = ?
					AND gti.local_graph_id = ?
					LIMIT 1',
					array($item['id'], $local_graph_id));
			} else {
				$current_def_value = db_fetch_row_prepared('SELECT gti.' . $item['column_name'] . ', gti.id
					FROM graph_templates_item AS gti
					INNER JOIN graph_template_input_defs AS gtid
					ON gtid.graph_template_item_id=gti.id
					WHERE gtid.graph_template_input_id = ?
					AND gti.graph_template_id = ?
					LIMIT 1',
					array($item['id'], $graph_template_id));
			}

			/* find our field name */
			$form_field_name = str_replace('|field|', $item['column_name'], $field_name_format);
			$form_field_name = str_replace('|id|', $item['id'], $form_field_name);

			if (get_selected_theme() != 'classic') {
				if (cacti_sizeof($current_def_value)) {
					$struct_graph_item[$item['column_name']]['id'] = $current_def_value[$item['column_name']];
					$struct_graph_item['task_item_id']['action']   = 'ajax_graph_items' . (isset($host_id) ? '&host_id=' . $host_id:'') . '&rrd_id=' . $current_def_value[$item['column_name']];
				}
			}

			$form_array += array($form_field_name => $struct_graph_item[$item['column_name']]);

			/* modifications to the default form array */
			$form_array[$form_field_name]['friendly_name'] = $item['name'];

			if (isset($current_def_value[$item['column_name']])) {
				$form_array[$form_field_name]['value'] = $current_def_value[$item['column_name']];
			} else {
				$form_array[$form_field_name]['value'] = '';
			}

			if ($locked == 'true') {
				if (strpos($form_field_name, 'task_item_id') !== false) {
					$form_array[$form_field_name]['method'] = 'value';

					if (isset($current_def_value[$item['column_name']])) {
						$value = db_fetch_cell_prepared("SELECT
							CONCAT_WS('', CASE WHEN host.description IS NULL THEN 'No Device - ' ELSE '' END, data_template_data.name_cache, ' (', data_template_rrd.data_source_name, ')') AS name
							FROM (data_template_data,data_template_rrd,data_local)
							LEFT JOIN host ON (data_local.host_id=host.id)
							WHERE data_template_rrd.local_data_id=data_local.id
							AND data_template_data.local_data_id=data_local.id
							AND data_template_rrd.id = ?",
							array($current_def_value[$item['column_name']]));

						$form_array[$form_field_name]['value'] = $value;
					}
				}
			} elseif (get_selected_theme() != 'classic') {
				if (strpos($form_field_name, 'task_item_id') !== false) {
					if (isset($current_def_value[$item['column_name']])) {
						$value = db_fetch_cell_prepared("SELECT
							CONCAT_WS('', CASE WHEN host.description IS NULL THEN 'No Device - ' ELSE '' END, data_template_data.name_cache, ' (', data_template_rrd.data_source_name, ')') AS name
							FROM (data_template_data,data_template_rrd,data_local)
							LEFT JOIN host ON (data_local.host_id=host.id)
							WHERE data_template_rrd.local_data_id=data_local.id
							AND data_template_data.local_data_id=data_local.id
							AND data_template_rrd.id = ?",
							array($current_def_value[$item['column_name']]));

						$form_array[$form_field_name]['value'] = $value;
					}
				}
			}

			/* if we are drawing the graph input list in the pre-graph stage we should omit the data
			source fields because they are basically meaningless at this point */
			if (empty($local_graph_id) && $item['column_name'] == 'task_item_id') {
				unset($form_array[$form_field_name]);
			} else {
				if ($draw_any_items == false && $header_title != '') {
					print "<div class='tableHeader'><div class='tableSubHeaderColumn'>$header_title</div></div>\n";
				}

				$draw_any_items = true;
				$num_fields_drawn++;
			}

			/* setup form options */
			if ($alternate_colors == true) {
				$form_config_array = array('no_form_tag' => true);
			} else {
				$form_config_array = array('no_form_tag' => true, 'force_row_color' => true);
			}

			if (cacti_sizeof($form_array)) {
				draw_edit_form(
					array(
						'config' => $form_config_array,
						'fields' => $form_array
					)
				);
			}
		}
	}

	return $num_fields_drawn;
}

/* draw_nontemplated_fields_data_source - draws a form that consists of all non-templated data source fields
	 associated with a particular data template
   @arg $data_template_id - the id of the data template to base the form after
   @arg $local_data_id - specify the id of the associated data source if it exists
   @arg $values_array - any values that should be included by default on the form
   @arg $field_name_format - all fields on the form will be named using the following format, the following
	 variables can be used:
	   |field| - the current field name
   @arg $header_title - the title to use on the header for this form
   @arg $alternate_colors (bool) - whether to alternate colors for each row on the form or not
   @arg $include_hidden_fields (bool) - should elements that are not to be displayed be represented as hidden
	 html input elements or omitted altogether?
   @arg $snmp_query_graph_id - if this data template is part of a data query, specify the graph id here. this
	 will be used to determine if a given field is using suggested values */
function draw_nontemplated_fields_data_source($data_template_id, $local_data_id, &$values_array, $field_name_format = '|field|', $header_title = '', $alternate_colors = true, $include_hidden_fields = true, $snmp_query_graph_id = 0) {
	global $struct_data_source;

	$form_array       = array();
	$draw_any_items   = false;
	$num_fields_drawn = 0;

	/* fetch information about the data template */
	$data_template = db_fetch_row_prepared('SELECT *
		FROM data_template_data
		WHERE data_template_id = ?
		AND local_data_id = 0',
		array($data_template_id));

	foreach ($struct_data_source as $field_name => $field_array) {
		/* find our field name */
		$form_field_name = str_replace('|field|', $field_name, $field_name_format);

		$form_array += array($form_field_name => $struct_data_source[$field_name]);

		/* modifications to the default form array */
		$form_array[$form_field_name]['value']   = (isset($values_array[$field_name]) ? $values_array[$field_name] : '');
		$form_array[$form_field_name]['form_id'] = (isset($values_array['id']) ? $values_array['id'] : '0');
		unset($form_array[$form_field_name]['default']);

		$current_flag          = (isset($field_array['flags']) ? $field_array['flags'] : '');
		$current_template_flag = (isset($data_template['t_' . $field_name]) ? $data_template['t_' . $field_name] : 'on');

		if (($current_template_flag != 'on') || ($current_flag == 'ALWAYSTEMPLATE')) {
			if ($include_hidden_fields == true) {
				$form_array[$form_field_name]['method'] = 'hidden';
			} else {
				unset($form_array[$form_field_name]);
			}
		} elseif ((!empty($snmp_query_graph_id)) && (cacti_sizeof(db_fetch_assoc_prepared('SELECT id FROM snmp_query_graph_rrd_sv WHERE snmp_query_graph_id = ? AND data_template_id = ? AND field_name = ?', array($snmp_query_graph_id, $data_template_id, $field_name))) > 0)) {
			if ($include_hidden_fields == true) {
				$form_array[$form_field_name]['method'] = 'hidden';
			} else {
				unset($form_array[$form_field_name]);
			}
		} elseif ((empty($local_data_id)) && ($field_name == 'data_source_path')) {
			if ($include_hidden_fields == true) {
				$form_array[$form_field_name]['method'] = 'hidden';
			} else {
				unset($form_array[$form_field_name]);
			}
		} else {
			if ($draw_any_items == false && $header_title != '') {
				print "<div class='tableHeader'><div class='tableSubHeaderColumn'>$header_title</div></div>\n";
			}

			$draw_any_items = true;
			$num_fields_drawn++;
		}
	}

	/* setup form options */
	if ($alternate_colors == true) {
		$form_config_array = array('no_form_tag' => true);
	} else {
		$form_config_array = array('no_form_tag' => true, 'force_row_color' => true);
	}

	if (cacti_sizeof($form_array)) {
		draw_edit_form(
			array(
				'config' => $form_config_array,
				'fields' => $form_array
			)
		);
	}

	return $num_fields_drawn;
}

/* draw_nontemplated_fields_data_source_item - draws a form that consists of all non-templated data source
	 item fields associated with a particular data template
   @arg $data_template_id - the id of the data template to base the form after
   @arg $values_array - any values that should be included by default on the form
   @arg $field_name_format - all fields on the form will be named using the following format, the following
	 variables can be used:
	   |field| - the current field name
	   |id| - the id of the current data source item
   @arg $header_title - the title to use on the header for this form
   @arg $draw_title_for_each_item (bool) - should a separate header be drawn for each data source item, or
	 should all data source items be drawn under one header?
   @arg $alternate_colors (bool) - whether to alternate colors for each row on the form or not
   @arg $include_hidden_fields (bool) - should elements that are not to be displayed be represented as hidden
	 html input elements or omitted altogether?
   @arg $snmp_query_graph_id - if this graph template is part of a data query, specify the graph id here. this
	 will be used to determine if a given field is using suggested values */
function draw_nontemplated_fields_data_source_item($data_template_id, &$values_array, $field_name_format = '|field_id|', $header_title = '', $draw_title_for_each_item = true, $alternate_colors = true, $include_hidden_fields = true, $snmp_query_graph_id = 0) {
	global $struct_data_source_item;

	$form_array       = array();
	$draw_any_items   = false;
	$num_fields_drawn = 0;

	if (cacti_sizeof($values_array)) {
		foreach ($values_array as $rrd) {
			$form_array = array();

			/**
			 * if the user specifies a title, we only want to draw that. if not, we should create our
			 * own title for each data source item
			 */
			if ($draw_title_for_each_item == true) {
				$draw_any_items = false;
			}

			if (empty($rrd['local_data_id'])) { /* this is a template */
				$data_template_rrd = $rrd;
			} else { /* this is not a template */
				$data_template_rrd = db_fetch_row_prepared('SELECT *
					FROM data_template_rrd
					WHERE id = ?',
					array($rrd['local_data_template_rrd_id']));
			}

			foreach ($struct_data_source_item as $field_name => $field_array) {
				/* find our field name */
				$form_field_name = str_replace('|field|', $field_name, $field_name_format);
				$form_field_name = str_replace('|id|', $rrd['id'], $form_field_name);

				$form_array += array($form_field_name => $struct_data_source_item[$field_name]);

				/* modifications to the default form array */
				$form_array[$form_field_name]['value']   = (isset($rrd[$field_name]) ? $rrd[$field_name] : '');
				$form_array[$form_field_name]['form_id'] = (isset($rrd['id']) ? $rrd['id'] : '0');
				unset($form_array[$form_field_name]['default']);

				/* append the data source item name so the user will recognize it */
				if ($draw_title_for_each_item == false) {
					$form_array[$form_field_name]['friendly_name'] .= ' [' . html_escape($rrd['data_source_name']) . ']';
				}

				if ($data_template_rrd['t_' . $field_name] != 'on') {
					if ($include_hidden_fields == true) {
						$form_array[$form_field_name]['method'] = 'hidden';
					} else {
						unset($form_array[$form_field_name]);
					}
				} elseif ((!empty($snmp_query_graph_id)) && (cacti_sizeof(db_fetch_assoc_prepared('SELECT id FROM snmp_query_graph_rrd_sv WHERE snmp_query_graph_id = ? AND data_template_id = ? AND field_name = ?', array($snmp_query_graph_id, $data_template_id, $field_name))) > 0)) {
					if ($include_hidden_fields == true) {
						$form_array[$form_field_name]['method'] = 'hidden';
					} else {
						unset($form_array[$form_field_name]);
					}
				} else {
					if ($draw_any_items == false && $draw_title_for_each_item == false && $header_title != '') {
						print "<div class='tableHeader'><div class='tableSubHeaderColumn'>$header_title</div></div>\n";
					} elseif ($draw_any_items == false && $draw_title_for_each_item == true && $header_title != '') {
						print "<div class='tableHeader'><div class='tableSubHeaderColumn'>$header_title [" . html_escape($rrd['data_source_name']) . "]</div></div>\n";
					}

					$draw_any_items = true;
					$num_fields_drawn++;

					/* if the 'Output field' appears here among the non-templated fields, the
					   valid choices for the drop-down box must be fetched from the associated
					   data input method */
					if ($field_name == 'data_input_field_id') {
						$data_input_id = db_fetch_cell_prepared('SELECT data_input_id
							FROM data_template_data
							WHERE data_template_id = ?
							AND local_data_id = 0',
							array($rrd['data_template_id']));

						$form_array[$form_field_name]['sql'] = "SELECT id, CONCAT(data_name,' - ',name) AS name
							FROM data_input_fields
							WHERE data_input_id=" . $data_input_id . "
							AND input_output = 'out'
							AND update_rra='on'
							ORDER BY data_name,name";
					}
				}
			}

			/* setup form options */
			if ($alternate_colors == true) {
				$form_config_array = array('no_form_tag' => true);
			} else {
				$form_config_array = array('no_form_tag' => true, 'force_row_color' => true);
			}

			if (cacti_sizeof($form_array)) {
				draw_edit_form(
					array(
						'config' => $form_config_array,
						'fields' => $form_array
					)
				);
			}
		}
	}

	return $num_fields_drawn;
}

/* draw_nontemplated_fields_custom_data - draws a form that consists of all non-templated custom data fields
	 associated with a particular data template
   @arg $data_template_id - the id of the data template to base the form after
   @arg $field_name_format - all fields on the form will be named using the following format, the following
	 variables can be used:
	   |id| - the id of the current field
   @arg $header_title - the title to use on the header for this form
   @arg $draw_title_for_each_item (bool) - should a separate header be drawn for each data source item, or
	 should all data source items be drawn under one header?
   @arg $alternate_colors (bool) - whether to alternate colors for each row on the form or not
   @arg $include_hidden_fields (bool) - should elements that are not to be displayed be represented as hidden
	 html input elements or omitted altogether?
   @arg $snmp_query_id - if this graph template is part of a data query, specify the data query id here. this
	 will be used to determine if a given field is associated with a suggested value */
function draw_nontemplated_fields_custom_data($data_template_data_id, $field_name_format = '|field|',
	$header_title = '', $alternate_colors = true, $include_hidden_fields = true, $snmp_query_id = 0) {
	$draw_any_items   = false;
	$num_fields_drawn = 0;

	$data = db_fetch_row_prepared('SELECT id, data_input_id, data_template_id, name, local_data_id
		FROM data_template_data
		WHERE id = ?',
		array($data_template_data_id));

	$host_id = db_fetch_cell_prepared('SELECT host.id
		FROM host
		INNER JOIN data_local
		ON data_local.host_id=host.id
		WHERE data_local.id = ?',
		array($data['local_data_id']));

	$template_data = db_fetch_row_prepared('SELECT id, data_input_id
		FROM data_template_data
		WHERE data_template_id = ?
		AND local_data_id = 0',
		array($data['data_template_id']));

	/* get each INPUT field for this data input source */
	$fields = db_fetch_assoc_prepared('SELECT *
		FROM data_input_fields
		WHERE data_input_id = ?
		AND input_output = "in"
		ORDER BY sequence',
		array($data['data_input_id']));

	/* loop through each field found */
	if (cacti_sizeof($fields)) {
		foreach ($fields as $field) {
			$data_input_data = db_fetch_row_prepared('SELECT *
				FROM data_input_data
				WHERE data_template_data_id = ?
				AND data_input_field_id = ?',
				array($data['id'], $field['id']));

			if (cacti_sizeof($data_input_data)) {
				$old_value = $data_input_data['value'];
			} else {
				$old_value = '';
			}

			/* if data template then get t_value from template, else always allow user input */
			if (empty($data['data_template_id'])) {
				$can_template = 'on';
			} else {
				$can_template = db_fetch_cell_prepared('SELECT t_value
					FROM data_input_data
					WHERE data_template_data_id = ?
					AND data_input_field_id = ?',
					array($template_data['id'], $field['id']));
			}

			/* find our field name */
			$form_field_name = str_replace('|id|', $field['id'], $field_name_format);

			if ((!empty($host_id)) && (preg_match('/^' . VALID_HOST_FIELDS . '$/i', $field['type_code'])) && (empty($can_template))) {
				/* no host fields */
				if ($include_hidden_fields == true) {
					form_hidden_box($form_field_name, $old_value, '');
				}
			} elseif ((!empty($snmp_query_id)) && (preg_match('/^(index_type|index_value|output_type)$/i', $field['type_code']))) {
				/* no data query fields */
				if ($include_hidden_fields == true) {
					form_hidden_box($form_field_name, $old_value, '');
				}
			} elseif (empty($can_template)) {
				/* no templated fields */
				if ($include_hidden_fields == true) {
					form_hidden_box($form_field_name, $old_value, '');
				}
			} else {
				if ($draw_any_items == false && $header_title != '') {
					print "<div class='tableHeader' style='width:100%'><div class='tableSubHeaderColumn'>$header_title</div></div>\n";
				}

				print "<div class='formRow " . ($alternate_colors ? ($num_fields_drawn % 2 ? 'even':'odd'): 'odd') . "'>\n";

				print "<div class='formColumnLeft'><div class='formFieldName'>" . html_escape($field['name']) . "</div></div>\n";
				print "<div class='formColumnRight'>";

				draw_custom_data_row($form_field_name, $field['id'], $data['id'], $old_value);

				print '</div>';
				print "</div>\n";

				$draw_any_items = true;
				$num_fields_drawn++;
			}
		}
	}

	return $num_fields_drawn;
}

/* draw_custom_data_row - draws a single row representing 'custom data' for a single data input field.
	 this function is where additional logic can be applied to control how a certain field of custom
	 data is represented on the HTML form
   @arg $field_name - the name of this form element
   @arg $data_input_field_id - the id of the data input field that this row represents
   @arg $data_template_data_id - the id of the data source data element that this data input field
	 belongs to
   @arg $current_value - the current value of this field */
function draw_custom_data_row($field_name, $data_input_field_id, $data_template_data_id, $current_value) {
	$field = db_fetch_row_prepared('SELECT data_name, type_code
		FROM data_input_fields
		WHERE id = ?',
		array($data_input_field_id));

	$local_data = db_fetch_row_prepared('SELECT dl.*
		FROM data_template_data AS dtd
		INNER JOIN data_local AS dl
		ON dl.id=dtd.local_data_id
		WHERE dtd.id = ?',
		array($data_template_data_id));

	if ($field['type_code'] == 'index_type' && cacti_sizeof($local_data)) {
		$index_type = db_fetch_assoc_prepared('SELECT DISTINCT hsc.field_name
			FROM host_snmp_cache AS hsc
			WHERE hsc.host_id = ?
			AND hsc.snmp_query_id = ?',
			array($local_data['host_id'], $local_data['snmp_query_id']));

		if (cacti_sizeof($index_type) == 0) {
			print '<em>' . __('Data Query Data Sources must be created through %s', "<a href='graphs_new.php'>" . __('New Graphs') . '.</a>') . "</em>\n";
		} else {
			form_dropdown($field_name, $index_type, 'field_name', 'field_name', $current_value, '', '', '');
		}
	} elseif ($field['type_code'] == 'output_type' && cacti_sizeof($local_data)) {
		$output_type = db_fetch_assoc_prepared('SELECT id, name
			FROM snmp_query_graph AS sqg
			WHERE snmp_query_id = ?
			ORDER BY name',
			array($local_data['snmp_query_id']));

		if (cacti_sizeof($output_type) == 0) {
			print '<em>' . __('Data Query Data Sources must be created through %s', "<a href='graphs_new.php'>" . __('New Graphs') . '.</a>') . "</em>\n";
		} else {
			form_dropdown($field_name, $output_type, 'name', 'id', $current_value, '', '', '');
		}
	} else {
		form_text_box($field_name, $current_value, '', '');
	}
}