<?php
/*
 +-------------------------------------------------------------------------+
 | Copyright (C) 2004-2020 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/                                                   |
 +-------------------------------------------------------------------------+
*/

function api_delete_graphs(&$local_graph_ids, $delete_type) {
	if (!cacti_sizeof($local_graph_ids)) {
		return;
	}

	api_graph_remove_aggregate_items($local_graph_ids);

	switch ($delete_type) {
	case '2': // delete all data sources referenced by this graph
		$all_data_sources = array_rekey(
			db_fetch_assoc('SELECT DISTINCT dtd.local_data_id
				FROM data_template_data AS dtd
				INNER JOIN data_template_rrd AS dtr
				ON dtd.local_data_id=dtr.local_data_id
				INNER JOIN graph_templates_item AS gti
				ON dtr.id=gti.task_item_id
				WHERE ' . array_to_sql_or($local_graph_ids, 'gti.local_graph_id') . '
				AND gti.local_graph_id NOT IN(SELECT local_graph_id FROM aggregate_graphs)
				AND dtd.local_data_id > 0'),
			'local_data_id', 'local_data_id'
		);

		if (cacti_sizeof($all_data_sources)) {
			$data_sources = array_rekey(
				db_fetch_assoc('SELECT dtd.local_data_id,
					COUNT(DISTINCT gti.local_graph_id) AS graphs
					FROM data_template_data AS dtd
					INNER JOIN data_template_rrd AS dtr
					ON dtd.local_data_id=dtr.local_data_id
					INNER JOIN graph_templates_item AS gti
					ON dtr.id=gti.task_item_id
					WHERE dtd.local_data_id > 0
					AND gti.local_graph_id NOT IN(SELECT local_graph_id FROM aggregate_graphs)
					GROUP BY dtd.local_data_id
					HAVING graphs = 1
					AND ' . array_to_sql_or($all_data_sources, 'local_data_id')),
				'local_data_id', 'local_data_id'
			);

			if (cacti_sizeof($data_sources)) {
				api_data_source_remove_multi($data_sources);
			}

			api_graph_remove_multi($local_graph_ids);

			/* Remove orphaned data sources */
			$data_sources = array_rekey(
				db_fetch_assoc('SELECT DISTINCT dtd.local_data_id
					FROM data_template_data AS dtd
					INNER JOIN data_template_rrd AS dtr
					ON dtd.local_data_id=dtr.local_data_id
					LEFT JOIN graph_templates_item AS gti
					ON dtr.id=gti.task_item_id
					WHERE ' . array_to_sql_or($all_data_sources, 'dtd.local_data_id') . '
					AND gti.local_graph_id IS NULL
					AND gti.local_graph_id NOT IN(SELECT local_graph_id FROM aggregate_graphs)
					AND dtd.local_data_id > 0'),
				'local_data_id', 'local_data_id'
			);

			if (cacti_sizeof($data_sources)) {
				api_data_source_remove_multi($data_sources);
			}
		}

		break;
	case '1':
		api_graph_remove_multi($local_graph_ids);

		break;
	}
}

function api_graph_remove($local_graph_id) {
	if (empty($local_graph_id)) {
		return;
	}

	api_plugin_hook_function('graphs_remove', array($local_graph_id));

	api_graph_remove_aggregate_items($local_graph_id);

	db_execute_prepared('DELETE FROM graph_templates_graph WHERE local_graph_id = ?', array($local_graph_id));
	db_execute_prepared('DELETE FROM graph_templates_item WHERE local_graph_id = ?', array($local_graph_id));
	db_execute_prepared('DELETE FROM graph_tree_items WHERE local_graph_id = ?', array($local_graph_id));
	db_execute_prepared('DELETE FROM reports_items WHERE local_graph_id = ?', array($local_graph_id));
	db_execute_prepared('DELETE FROM graph_local WHERE id = ?', array($local_graph_id));
}

function api_graph_remove_aggregate_items($local_graph_ids) {
	if (!is_array($local_graph_ids)) {
		$local_graph_ids = explode(',', $local_graph_ids);
	}

	foreach($local_graph_ids as $lgid) {
		$aggregate_graphs = array_rekey(
			db_fetch_assoc_prepared('SELECT DISTINCT aggregate_graph_id
				FROM aggregate_graphs_items
				WHERE local_graph_id = ?',
				array($lgid)),
			'aggregate_graph_id', 'aggregate_graph_id'
		);

		if (cacti_sizeof($aggregate_graphs)) {
			foreach($aggregate_graphs as $ag) {
				api_aggregate_disassociate($ag, $lgid);
			}
		}
	}
}

function api_graph_remove_multi($local_graph_ids) {
	if (!cacti_sizeof($local_graph_ids)) {
		return;
	}

	/* initialize variables */
	$ids_to_delete = '';
	$i = 0;

	/* build the array */
	if (cacti_sizeof($local_graph_ids)) {
		api_plugin_hook_function('graphs_remove', $local_graph_ids);

		foreach($local_graph_ids as $local_graph_id) {
			if ($i == 0) {
				$ids_to_delete .= $local_graph_id;
			} else {
				$ids_to_delete .= ', ' . $local_graph_id;
			}

			$i++;

			if (($i % 1000) == 0) {
				api_graph_remove_aggregate_items($ids_to_delete);

				db_execute("DELETE FROM graph_templates_graph WHERE local_graph_id IN ($ids_to_delete)");
				db_execute("DELETE FROM graph_templates_item WHERE local_graph_id IN ($ids_to_delete)");
				db_execute("DELETE FROM graph_tree_items WHERE local_graph_id IN ($ids_to_delete)");
				db_execute("DELETE FROM reports_items WHERE local_graph_id IN ($ids_to_delete)");
				db_execute("DELETE FROM graph_local WHERE id IN ($ids_to_delete)");

				$i = 0;
				$ids_to_delete = '';
			}
		}

		if ($i > 0) {
			api_graph_remove_aggregate_items($ids_to_delete);

			db_execute("DELETE FROM graph_templates_graph WHERE local_graph_id IN ($ids_to_delete)");
			db_execute("DELETE FROM graph_templates_item WHERE local_graph_id IN ($ids_to_delete)");
			db_execute("DELETE FROM graph_tree_items WHERE local_graph_id IN ($ids_to_delete)");
			db_execute("DELETE FROM reports_items WHERE local_graph_id IN ($ids_to_delete)");
			db_execute("DELETE FROM graph_local WHERE id IN ($ids_to_delete)");
		}
	}
}

/* api_resize_graphs - resizes the selected graph, overriding the template value
   @arg $graph_templates_graph_id - the id of the graph to resize
   @arg $graph_width - the width of the resized graph
   @arg $graph_height - the height of the resized graph
  */
function api_resize_graphs($local_graph_id, $graph_width, $graph_height) {
	/* get graphs template id */
	db_execute_prepared('UPDATE graph_templates_graph
		SET width = ?, height = ?
		WHERE local_graph_id = ?',
		array($graph_width, $graph_height, $local_graph_id));
}

/* api_reapply_suggested_graph_title - reapplies the suggested name to a graph title
   @param int $graph_templates_graph_id - the id of the graph to reapply the name to
*/
function api_reapply_suggested_graph_title($local_graph_id) {
	global $config;

	/* get graphs template id */
	$graph_template_id = db_fetch_cell_prepared('SELECT graph_template_id
		FROM graph_templates_graph
		WHERE local_graph_id = ?',
		array($local_graph_id));

	/* if a non-template graph, simply return */
	if ($graph_template_id == 0) {
		return;
	}

	/* get the host associated with this graph for data queries only
	 * there's no "reapply suggested title" for "simple" graph templates */
	$graph_local = db_fetch_row_prepared('SELECT *
		FROM graph_local
		WHERE id = ?',
		array($local_graph_id));

	/* if this is not a data query graph, simply return */
	if (!isset($graph_local['host_id'])) {
		return;
	}

	/* no snmp query graph id found */
	if ($graph_local['snmp_query_graph_id'] == 0) {
		return;
	}

	/* get the suggested values from the suggested values cache */
	$suggested_values = db_fetch_assoc_prepared("SELECT text, field_name
		FROM snmp_query_graph_sv
		WHERE snmp_query_graph_id = ?
		AND field_name = 'title'
		ORDER BY sequence",
		array($graph_local['snmp_query_graph_id']));

	$matches = array();

	$suggested_values_graph = array();
	if (cacti_sizeof($suggested_values)) {
		foreach ($suggested_values as $suggested_value) {
			/* once we find a match; don't try to find more */
			if (!isset($suggested_values_graph[$suggested_value['field_name']])) {
				$subs_string = substitute_snmp_query_data($suggested_value['text'], $graph_local['host_id'], $graph_local['snmp_query_id'], $graph_local['snmp_index'], read_config_option('max_data_query_field_length'));

				/* if there are no '|' characters, all of the substitutions were successful */
				if (!substr_count($subs_string, '|query')) {
					if (in_array($suggested_value['field_name'], $matches)) {
						continue;
					}

					$matches[] = $suggested_value['field_name'];

					db_execute_prepared('UPDATE graph_templates_graph
						SET ' . $suggested_value['field_name'] . ' = ?
						WHERE local_graph_id = ?',
						array($suggested_value['text'], $local_graph_id));

					/* once we find a working value for this very field, stop */
					$suggested_values_graph[$suggested_value['field_name']] = true;
				}
			}
		}

		if (sizeof($matches)) {
			return true;
		}
	}

	return false;
}

/* api_get_graphs_from_datasource - get's all graphs related to a data source
   @arg $local_data_id - the id of the data source
   @returns - array($id => $name_cache) returns the graph id's and names of the graphs
  */
function api_get_graphs_from_datasource($local_data_id) {
	return array_rekey(db_fetch_assoc_prepared('SELECT DISTINCT graph_templates_graph.local_graph_id AS id,
		graph_templates_graph.title_cache AS name
		FROM (graph_templates_graph
		INNER JOIN graph_templates_item
		ON graph_templates_graph.local_graph_id = graph_templates_item.local_graph_id)
		INNER JOIN data_template_rrd
		ON graph_templates_item.task_item_id = data_template_rrd.id
		WHERE graph_templates_graph.local_graph_id > 0
		AND data_template_rrd.local_data_id = ?', array($local_data_id)), 'id', 'name');
}

function api_duplicate_graph($_local_graph_id, $_graph_template_id, $graph_title) {
	global $struct_graph, $struct_graph_item;

	if (!empty($_local_graph_id)) {
		$graph_local = db_fetch_row_prepared('SELECT *
			FROM graph_local
			WHERE id = ?',
			array($_local_graph_id));

		$graph_template_graph = db_fetch_row_prepared('SELECT *
			FROM graph_templates_graph
			WHERE local_graph_id = ?',
			array($_local_graph_id));

		$graph_template_items = db_fetch_assoc_prepared('SELECT *
			FROM graph_templates_item
			WHERE local_graph_id = ?',
			array($_local_graph_id));

		/* create new entry: graph_local */
		$save['id'] = 0;
		$save['graph_template_id'] = $graph_local['graph_template_id'];
		$save['host_id']           = $graph_local['host_id'];
		$save['snmp_query_id']     = $graph_local['snmp_query_id'];
		$save['snmp_index']        = $graph_local['snmp_index'];

		$local_graph_id = sql_save($save, 'graph_local');

		$graph_template_graph['title'] = str_replace('<graph_title>', $graph_template_graph['title'], $graph_title);
	} elseif (!empty($_graph_template_id)) {
		$graph_template        = db_fetch_row_prepared('SELECT *
			FROM graph_templates
			WHERE id = ?',
			array($_graph_template_id));

		$graph_template_graph  = db_fetch_row_prepared('SELECT *
			FROM graph_templates_graph
			WHERE graph_template_id = ?
			AND local_graph_id=0',
			array($_graph_template_id));

		$graph_template_items  = db_fetch_assoc_prepared('SELECT *
			FROM graph_templates_item
			WHERE graph_template_id = ?
			AND local_graph_id=0',
			array($_graph_template_id));

		$graph_template_inputs = db_fetch_assoc_prepared('SELECT *
			FROM graph_template_input
			WHERE graph_template_id = ?',
			array($_graph_template_id));

		/* create new entry: graph_templates */
		$save['id']       = 0;
		$save['hash']     = get_hash_graph_template(0);
		$save['name']     = str_replace('<template_title>', $graph_template['name'], $graph_title);
		$save['multiple'] = $graph_template['multiple'];

		$graph_template_id = sql_save($save, 'graph_templates');
	}

	unset($save);

	/* create new entry: graph_templates_graph */
	$save['id']                            = 0;
	$save['local_graph_id']                = (isset($local_graph_id) ? $local_graph_id : 0);
	$save['local_graph_template_graph_id'] = (isset($graph_template_graph['local_graph_template_graph_id']) ? $graph_template_graph['local_graph_template_graph_id'] : 0);
	$save['graph_template_id']             = (!empty($_local_graph_id) ? $graph_template_graph['graph_template_id'] : $graph_template_id);
	$save['title_cache']                   = $graph_template_graph['title_cache'];

	foreach ($struct_graph as $field => $array) {
		if ($array['method'] == 'spacer') continue;
		$save[$field] = $graph_template_graph[$field];
		$save['t_' . $field] = $graph_template_graph['t_' . $field];
	}

	$graph_templates_graph_id = sql_save($save, 'graph_templates_graph');

	/* create new entry(s): graph_templates_item */
	if (cacti_sizeof($graph_template_items)) {
		foreach ($graph_template_items as $graph_template_item) {
			unset($save);

			$save['id']                           = 0;
			/* save a hash only for graph_template copy operations */
			$save['hash']                         = (!empty($_graph_template_id) ? get_hash_graph_template(0, 'graph_template_item') : 0);
			$save['local_graph_id']               = (isset($local_graph_id) ? $local_graph_id : 0);
			$save['graph_template_id']            = (!empty($_local_graph_id) ? $graph_template_item['graph_template_id'] : $graph_template_id);
			$save['local_graph_template_item_id'] = (isset($graph_template_item['local_graph_template_item_id']) ? $graph_template_item['local_graph_template_item_id'] : 0);

			foreach ($struct_graph_item as $field => $array) {
				$save[$field] = $graph_template_item[$field];
			}

			$graph_item_mappings[$graph_template_item['id']] = sql_save($save, 'graph_templates_item');
		}
	}

	if (!empty($_graph_template_id)) {
		/* create new entry(s): graph_template_input (graph template only) */
		if (cacti_sizeof($graph_template_inputs)) {
			foreach ($graph_template_inputs as $graph_template_input) {
				unset($save);

				$save['id']                = 0;
				$save['graph_template_id'] = $graph_template_id;
				$save['name']              = $graph_template_input['name'];
				$save['description']       = $graph_template_input['description'];
				$save['column_name']       = $graph_template_input['column_name'];
				$save['hash']              = get_hash_graph_template(0, 'graph_template_input');

				$graph_template_input_id   = sql_save($save, 'graph_template_input');

				$graph_template_input_defs = db_fetch_assoc_prepared('SELECT *
					FROM graph_template_input_defs
					WHERE graph_template_input_id = ?',
					array($graph_template_input['id']));

				/* create new entry(s): graph_template_input_defs (graph template only) */
				if (cacti_sizeof($graph_template_input_defs)) {
					foreach ($graph_template_input_defs as $graph_template_input_def) {
						db_execute_prepared('INSERT INTO graph_template_input_defs
							(graph_template_input_id, graph_template_item_id)
							VALUES (?, ?)',
							array(
								$graph_template_input_id,
								$graph_item_mappings[$graph_template_input_def['graph_template_item_id']]
							)
						);
					}
				}
			}
		}
	}

	if (!empty($_local_graph_id)) {
		update_graph_title_cache($local_graph_id);
	} else {
		// Graph Template, Check for Data Query Associated Graph Template
		$data_query_graphs = db_fetch_assoc_prepared('SELECT *
			FROM snmp_query_graph
			WHERE graph_template_id = ?',
			array($_graph_template_id));

		if (cacti_sizeof($data_query_graphs)) {
			unset($save);

			$name = db_fetch_cell_prepared('SELECT name
				FROM graph_templates
				WHERE id = ?',
				array($graph_template_id));

			foreach($data_query_graphs as $dqg) {
				/* map the snmp_query_graph */
				unset($save);

				$save['id']                = 0;
				$save['hash']              = get_hash_data_query('', 'data_query_graph');
				$save['snmp_query_id']     = $dqg['snmp_query_id'];
				$save['name']              = $name;
				$save['graph_template_id'] = $graph_template_id;

				$snmp_query_graph_id = sql_save($save, 'snmp_query_graph');

				/* map the snmp_query_graph_rrds */
				if (!empty($snmp_query_graph_id)) {
					$snmp_query_graph_rrds = db_fetch_assoc_prepared('SELECT *
						FROM snmp_query_graph_rrd
						WHERE snmp_query_graph_id = ?',
						array($dqg['id']));

					if (cacti_sizeof($snmp_query_graph_rrds)) {
						foreach($snmp_query_graph_rrds as $sqgr) {
							db_execute_prepared('INSERT INTO snmp_query_graph_rrd
								(snmp_query_graph_id, data_template_id, data_template_rrd_id, snmp_field_name)
								VALUES (?, ?, ?, ?)',
								array(
									$snmp_query_graph_id,
									$sqgr['data_template_id'],
									$sqgr['data_template_rrd_id'],
									$sqgr['snmp_field_name']
								)
							);
						}
					}
				}

				/* map data source suggested values */
				$snames = db_fetch_assoc_prepared('SELECT *
					FROM snmp_query_graph_rrd_sv
					WHERE snmp_query_graph_id = ?',
					array($dqg['id']));

				if (cacti_sizeof($snames)) {
					foreach($snames as $sn) {
						unset($save);

						$save['id']                  = 0;
						$save['hash']                = get_hash_data_query(0, 'data_query_sv_data_source');
						$save['snmp_query_graph_id'] = $snmp_query_graph_id;
						$save['data_template_id']    = $sn['data_template_id'];
						$save['sequence']            = $sn['sequence'];
						$save['field_name']          = $sn['field_name'];
						$save['text']                = $sn['text'];

						sql_save($save, 'snmp_query_graph_rrd_sv');
					}
				}

				/* map graph suggested values */
				$snames = db_fetch_assoc_prepared('SELECT *
					FROM snmp_query_graph_sv
					WHERE snmp_query_graph_id = ?',
					array($dqg['id']));

				if (cacti_sizeof($snames)) {
					foreach($snames as $sn) {
						unset($save);

						$save['id']                  = 0;
						$save['hash']                = get_hash_data_query(0, 'data_query_sv_graph');
						$save['snmp_query_graph_id'] = $snmp_query_graph_id;
						$save['sequence']            = $sn['sequence'];
						$save['field_name']          = $sn['field_name'];
						$save['text']                = $sn['text'];

						sql_save($save, 'snmp_query_graph_sv');
					}
				}
			}
		}
	}
}

function api_graph_change_device($local_graph_id, $host_id) {
	$dqgraph = db_fetch_cell_prepared('SELECT snmp_query_id
		FROM graph_local
		WHERE id = ?',
		array($local_graph_id));

	if (empty($dqgraph)) {
		db_execute_prepared('UPDATE graph_local
			SET host_id = ?
			WHERE id = ?',
			array($host_id, $local_graph_id));

		update_graph_title_cache($local_graph_id);

		/* update the data sources as well */
		$data_ids = db_fetch_assoc_prepared('SELECT DISTINCT dtr.local_data_id
			FROM graph_templates_item AS gti
			INNER JOIN data_template_rrd AS dtr
			ON gti.task_item_id=dtr.id
			WHERE gti.local_graph_id = ?',
			array($local_graph_id));

		if (cacti_sizeof($data_ids)) {
			foreach($data_ids as $data_id) {
				db_execute_prepared('UPDATE data_local
					SET host_id = ?
					WHERE id = ?',
					array($host_id, $data_id['local_data_id']));

				db_execute_prepared('UPDATE poller_item
					SET host_id = ?
					WHERE local_data_id = ?',
					array($host_id, $data_id['local_data_id']));
			}
		}

		return true;
	}

	return false;
}

