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<?php
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//$Header: /hl/cvsroots/gpl01/gpl01/webprojs/fboprime/sw/phplib/resv.inc,v 1.5 2006/07/29 23:04:50 dashley Exp $
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//--------------------------------------------------------------------------------------------------------------
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//resv.inc--FboPrime Database resv Table Manipulation Functions
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//Copyright (C) 2006 David T. Ashley
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//
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//This program is free software; you can redistribute it and/or
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//modify it under the terms of the GNU General Public License
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//as published by the Free Software Foundation; either version 2
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//of the License, or (at your option) any later version.
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//
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//This program is distributed in the hope that it will be useful,
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//but WITHOUT ANY WARRANTY; without even the implied warranty of
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//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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//GNU General Public License for more details.
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//
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//You should have received a copy of the GNU General Public License
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//along with this program; if not, write to the Free Software
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//Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//********************************************************************************
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//Contains functions related to [operations on] the usrs table of the database.
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//--------------------------------------------------------------------------------------------------------------
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//
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require_once("db.inc");
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require_once("global.inc");
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//
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//--------------------------------------------------------------------------------------------------------------
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//Constants for usrs table fields.
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//
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//Constants for different types of reservations.
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define("RESV_TYPE_BANNER", 0 );
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define("RESV_TYPE_ACTIVE", 1 );
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define("RESV_TYPE_STANDBY", 2 );
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//
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//--------------------------------------------------------------------------------------------------------------
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//Retrieves a two dimensional associative array corresponding to the RESV record
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//with the passed IDX, or FALSE if the record does not exist.
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//
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function RESV_retrieve_by_idx($idx)
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{
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global $GLOBAL_dbhandle;
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//Form the query string.
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$query_string = "SELECT * FROM resv WHERE idx=\""
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.
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mysql_real_escape_string($idx, $GLOBAL_dbhandle)
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.
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"\"";
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//Execute the query.
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$result = mysql_query($query_string, $GLOBAL_dbhandle);
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if ($result === FALSE)
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{
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//Unknown query failure. Return FALSE to the caller. No need to free,
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//as this is not a result.
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$rv = FALSE;
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}
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else
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{
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//Figure out how many rows in the result.
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$nrows = mysql_num_rows($result);
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if ($nrows == 0)
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{
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//No rows in the result. The query failed to give us a record, but still
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//we need to free the result set.
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//Free the result.
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mysql_free_result($result);
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//The caller gets FALSE. No record with that SID.
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$rv = FALSE;
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}
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else
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{
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//We have at least one record. Assume just one, because the IDX is supposed
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//to be unique.
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$rv = mysql_fetch_assoc($result); //Get the associative record.
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//Free the result.
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mysql_free_result($result);
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}
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//Return the value to the caller.
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return($rv);
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}
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}
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//
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//--------------------------------------------------------------------------------------------------------------
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//Retrieves two two-dimensional arrays of elements containing full information about each reservation that
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//overlaps into the passed time window. Two arrays are necessary because we have the need to sort both by
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//flight instructor and by aircraft/simulator.
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//
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//Reservations are sorted first by index of the flight instructor/resource, then by reservation, then by the
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//start time, then by the tie-breaker SGUID.
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//
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//The start-time ordering is necessary to be sure that within a displayed row, one doesn't have to sort
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//before trying to display.
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//
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//For each of the two arrays, a parallel search array is also returned. The indices of the parallel search
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//array are the same as the corresponding indices of the data array, and the values are the flight
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//instructor/resource index. The purpose of the parallel search array are to assist in locating the data
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//for a given flight instructor/resource by index in the data array as rapidly as possible.
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//
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//If no reservations apply for either of the two queries, FALSE is returned in both the data array and
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//the search array.
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//
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function RESV_resvns_in_time_window( $stime_startwindow_in,
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$stime_endwindow_in,
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&$flight_inst_data_array,
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&$flight_inst_search_array,
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&$resource_data_array,
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&$resource_search_array )
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{
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global $GLOBAL_dbhandle;
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//------------------------------------------------------------------------------------------------------------
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//Start with a clean slate for the output variables.
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//
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if (isset($flight_inst_data_array))
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unset($flight_inst_data_array);
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if (isset($flight_inst_search_array))
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unset($flight_inst_search_array);
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if (isset($resource_data_array))
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unset($resource_data_array);
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if (isset($resource_search_array))
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unset($resource_search_array);
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//
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//------------------------------------------------------------------------------------------------------------
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//Flight instructor half.
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//
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$query_string = "SELECT * FROM resv WHERE finstid!=\"0\" AND finsttimestart<\""
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.
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$stime_endwindow_in
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.
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"\" AND finsttimeend>\""
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.
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$stime_startwindow_in
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.
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"\" ORDER BY finstid, type, finsttimestart, crsguid ASC";
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$result = mysql_query($query_string, $GLOBAL_dbhandle);
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//If the query did not go through successfully, return FALSE to the caller.
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//
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if ($result === FALSE)
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{
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//The caller gets FALSE signaling no data.
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$flight_inst_data_array = FALSE;
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$flight_inst_search_array = FALSE;
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}
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//
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//If the number of rows in the result set is 0, also give the caller FALSE.
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else if (mysql_num_rows($result) <= 0)
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{
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//Technically, we got a result set, so free it.
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mysql_free_result($result);
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//The caller gets FALSE signaling no data.
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$flight_inst_data_array = FALSE;
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$flight_inst_search_array = FALSE;
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}
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else
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{
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//If we're here, we have a valid result set. Each row of the returned array is
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//the expected fields from the resv table.
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//Copy out the results to the array we'll return.
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while ($row = mysql_fetch_assoc($result))
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{
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$flight_inst_data_array[] = $row; //Assign the data.
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$flight_inst_search_array[] = $row["finstid"]; //Set the search index.
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}
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//Free memory.
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mysql_free_result($result);
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}
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//------------------------------------------------------------------------------------------------------------
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//Resource half.
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//
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$query_string = "SELECT * FROM resv WHERE acftsimid!=\"0\" AND acftsimtimestart<\""
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.
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$stime_endwindow_in
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.
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"\" AND acftsimtimeend>\""
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.
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$stime_startwindow_in
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.
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"\" ORDER BY acftsimid, type, acftsimtimestart, crsguid ASC";
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$result = mysql_query($query_string, $GLOBAL_dbhandle);
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//If the query did not go through successfully, return FALSE to the caller.
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//
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if ($result === FALSE)
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{
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//The caller gets FALSE signaling no data.
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$resource_data_array = FALSE;
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$resource_search_array = FALSE;
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}
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//
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//If the number of rows in the result set is 0, also give the caller FALSE.
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else if (mysql_num_rows($result) <= 0)
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{
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//Technically, we got a result set, so free it.
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mysql_free_result($result);
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//The caller gets FALSE signaling no data.
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$resource_data_array = FALSE;
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$resource_search_array = FALSE;
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}
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else
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{
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//If we're here, we have a valid result set. Each row of the returned array is
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//the expected fields from the resv table.
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//Copy out the results to the array we'll return.
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while ($row = mysql_fetch_assoc($result))
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{
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$resource_data_array[] = $row; //Assign the data.
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$resource_search_array[] = $row["acftsimid"]; //Set the search index.
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}
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//Free memory.
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mysql_free_result($result);
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}
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}
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//
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//--------------------------------------------------------------------------------------------------------------
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//Extracts the records pertaining to a certain flight instructor from an array returned from
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//the RESV_resvns_in_time_window() function, using the search array as a search aid. Returns FALSE
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//if no match.
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//
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//Records must not have been rearranged (they must still be sorted by the flight instructor ID).
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//
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function RESV_extract_finst_records($data_array_in, $search_array_in, $idx_to_find_in)
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{
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//If the data array or search array are FALSE, then the result is FALSE, i.e. subset of the
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//empty set is also the empty set.
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if (($data_array_in === FALSE) || ($search_array_in === FALSE))
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{
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return(FALSE);
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}
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//Find the first record with the passed index, if any. This is enough, as the others will be contiguous.
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$index = array_search($idx_to_find_in, $search_array_in);
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//If there is no match, return FALSE.
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if (($index === FALSE) || ($index === NULL))
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{
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return(FALSE);
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}
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//If we're here, we have success. Find out how many elements in the array, for reference.
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$n = count($data_array_in);
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//Tack the original search success onto the return value.
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$rv[] = $data_array_in[$index];
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//Find any others.
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$index++;
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while (($index < $n) && ($search_array_in[$index] == $idx_to_find_in))
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{
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$rv[] = $data_array_in[$index];
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$index++;
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}
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//Return the results.
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return($rv);
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}
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//
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//--------------------------------------------------------------------------------------------------------------
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//Extracts the records pertaining to a certain resource (aircraft/simulator) from an array returned from
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//the RESV_resvns_in_time_window() function, using the search array as a search aid. Returns FALSE
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//if no match.
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//
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//Records must not have been rearranged (they must still be sorted by the resource ID).
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//
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function RESV_extract_resource_records($data_array_in, $search_array_in, $idx_to_find_in)
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{
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//If the data array or search array are FALSE, then the result is FALSE, i.e. subset of the
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//empty set is also the empty set.
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if (($data_array_in === FALSE) || ($search_array_in === FALSE))
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{
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return(FALSE);
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}
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//Find the first record with the passed index, if any. This is enough, as the others will be contiguous.
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$index = array_search($idx_to_find_in, $search_array_in);
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//If there is no match, return FALSE.
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if (($index === FALSE) || ($index === NULL))
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{
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return(FALSE);
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}
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//If we're here, we have success. Find out how many elements in the array, for reference.
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$n = count($data_array_in);
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//Tack the original search success onto the return value.
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$rv[] = $data_array_in[$index];
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//Find any others.
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$index++;
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while (($index < $n) && ($search_array_in[$index] == $idx_to_find_in))
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{
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$rv[] = $data_array_in[$index];
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$index++;
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}
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//Return the results.
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return($rv);
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}
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//
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//--------------------------------------------------------------------------------------------------------------
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//End of $RCSfile: resv.inc,v $.
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//--------------------------------------------------------------------------------------------------------------
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?>
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