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Revision 35 - (show annotations) (download)
Sat Oct 8 23:35:33 2016 UTC (6 years, 3 months ago) by dashley
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Initial commit.
1 <?php
2 //$Header: /hl/cvsroots/gpl01/gpl01/webprojs/fboprime/sw/phplib/resv.inc,v 1.5 2006/07/29 23:04:50 dashley Exp $
3 //--------------------------------------------------------------------------------------------------------------
4 //resv.inc--FboPrime Database resv Table Manipulation Functions
5 //Copyright (C) 2006 David T. Ashley
6 //
7 //This program is free software; you can redistribute it and/or
8 //modify it under the terms of the GNU General Public License
9 //as published by the Free Software Foundation; either version 2
10 //of the License, or (at your option) any later version.
11 //
12 //This program is distributed in the hope that it will be useful,
13 //but WITHOUT ANY WARRANTY; without even the implied warranty of
14 //MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 //GNU General Public License for more details.
16 //
17 //You should have received a copy of the GNU General Public License
18 //along with this program; if not, write to the Free Software
19 //Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
20 //********************************************************************************
21 //Contains functions related to [operations on] the usrs table of the database.
22 //--------------------------------------------------------------------------------------------------------------
23 //
24 require_once("db.inc");
25 require_once("global.inc");
26 //
27 //--------------------------------------------------------------------------------------------------------------
28 //Constants for usrs table fields.
29 //
30 //Constants for different types of reservations.
31 define("RESV_TYPE_BANNER", 0 );
32 define("RESV_TYPE_ACTIVE", 1 );
33 define("RESV_TYPE_STANDBY", 2 );
34 //
35 //--------------------------------------------------------------------------------------------------------------
36 //Retrieves a two dimensional associative array corresponding to the RESV record
37 //with the passed IDX, or FALSE if the record does not exist.
38 //
39 function RESV_retrieve_by_idx($idx)
40 {
41 global $GLOBAL_dbhandle;
42
43 //Form the query string.
44 $query_string = "SELECT * FROM resv WHERE idx=\""
45 .
46 mysql_real_escape_string($idx, $GLOBAL_dbhandle)
47 .
48 "\"";
49
50 //Execute the query.
51 $result = mysql_query($query_string, $GLOBAL_dbhandle);
52
53 if ($result === FALSE)
54 {
55 //Unknown query failure. Return FALSE to the caller. No need to free,
56 //as this is not a result.
57 $rv = FALSE;
58 }
59 else
60 {
61 //Figure out how many rows in the result.
62 $nrows = mysql_num_rows($result);
63
64 if ($nrows == 0)
65 {
66 //No rows in the result. The query failed to give us a record, but still
67 //we need to free the result set.
68
69 //Free the result.
70 mysql_free_result($result);
71
72 //The caller gets FALSE. No record with that SID.
73 $rv = FALSE;
74 }
75 else
76 {
77 //We have at least one record. Assume just one, because the IDX is supposed
78 //to be unique.
79 $rv = mysql_fetch_assoc($result); //Get the associative record.
80
81 //Free the result.
82 mysql_free_result($result);
83 }
84
85 //Return the value to the caller.
86 return($rv);
87 }
88 }
89 //
90 //--------------------------------------------------------------------------------------------------------------
91 //Retrieves two two-dimensional arrays of elements containing full information about each reservation that
92 //overlaps into the passed time window. Two arrays are necessary because we have the need to sort both by
93 //flight instructor and by aircraft/simulator.
94 //
95 //Reservations are sorted first by index of the flight instructor/resource, then by reservation, then by the
96 //start time, then by the tie-breaker SGUID.
97 //
98 //The start-time ordering is necessary to be sure that within a displayed row, one doesn't have to sort
99 //before trying to display.
100 //
101 //For each of the two arrays, a parallel search array is also returned. The indices of the parallel search
102 //array are the same as the corresponding indices of the data array, and the values are the flight
103 //instructor/resource index. The purpose of the parallel search array are to assist in locating the data
104 //for a given flight instructor/resource by index in the data array as rapidly as possible.
105 //
106 //If no reservations apply for either of the two queries, FALSE is returned in both the data array and
107 //the search array.
108 //
109 function RESV_resvns_in_time_window( $stime_startwindow_in,
110 $stime_endwindow_in,
111 &$flight_inst_data_array,
112 &$flight_inst_search_array,
113 &$resource_data_array,
114 &$resource_search_array )
115 {
116 global $GLOBAL_dbhandle;
117
118 //------------------------------------------------------------------------------------------------------------
119 //Start with a clean slate for the output variables.
120 //
121 if (isset($flight_inst_data_array))
122 unset($flight_inst_data_array);
123 if (isset($flight_inst_search_array))
124 unset($flight_inst_search_array);
125 if (isset($resource_data_array))
126 unset($resource_data_array);
127 if (isset($resource_search_array))
128 unset($resource_search_array);
129 //
130 //------------------------------------------------------------------------------------------------------------
131 //Flight instructor half.
132 //
133 $query_string = "SELECT * FROM resv WHERE finstid!=\"0\" AND finsttimestart<\""
134 .
135 $stime_endwindow_in
136 .
137 "\" AND finsttimeend>\""
138 .
139 $stime_startwindow_in
140 .
141 "\" ORDER BY finstid, type, finsttimestart, crsguid ASC";
142
143 $result = mysql_query($query_string, $GLOBAL_dbhandle);
144
145 //If the query did not go through successfully, return FALSE to the caller.
146 //
147 if ($result === FALSE)
148 {
149 //The caller gets FALSE signaling no data.
150 $flight_inst_data_array = FALSE;
151 $flight_inst_search_array = FALSE;
152 }
153 //
154 //If the number of rows in the result set is 0, also give the caller FALSE.
155 else if (mysql_num_rows($result) <= 0)
156 {
157 //Technically, we got a result set, so free it.
158 mysql_free_result($result);
159
160 //The caller gets FALSE signaling no data.
161 $flight_inst_data_array = FALSE;
162 $flight_inst_search_array = FALSE;
163 }
164 else
165 {
166 //If we're here, we have a valid result set. Each row of the returned array is
167 //the expected fields from the resv table.
168
169 //Copy out the results to the array we'll return.
170 while ($row = mysql_fetch_assoc($result))
171 {
172 $flight_inst_data_array[] = $row; //Assign the data.
173 $flight_inst_search_array[] = $row["finstid"]; //Set the search index.
174 }
175
176 //Free memory.
177 mysql_free_result($result);
178 }
179
180 //------------------------------------------------------------------------------------------------------------
181 //Resource half.
182 //
183 $query_string = "SELECT * FROM resv WHERE acftsimid!=\"0\" AND acftsimtimestart<\""
184 .
185 $stime_endwindow_in
186 .
187 "\" AND acftsimtimeend>\""
188 .
189 $stime_startwindow_in
190 .
191 "\" ORDER BY acftsimid, type, acftsimtimestart, crsguid ASC";
192
193 $result = mysql_query($query_string, $GLOBAL_dbhandle);
194
195 //If the query did not go through successfully, return FALSE to the caller.
196 //
197 if ($result === FALSE)
198 {
199 //The caller gets FALSE signaling no data.
200 $resource_data_array = FALSE;
201 $resource_search_array = FALSE;
202 }
203 //
204 //If the number of rows in the result set is 0, also give the caller FALSE.
205 else if (mysql_num_rows($result) <= 0)
206 {
207 //Technically, we got a result set, so free it.
208 mysql_free_result($result);
209
210 //The caller gets FALSE signaling no data.
211 $resource_data_array = FALSE;
212 $resource_search_array = FALSE;
213 }
214 else
215 {
216 //If we're here, we have a valid result set. Each row of the returned array is
217 //the expected fields from the resv table.
218
219 //Copy out the results to the array we'll return.
220 while ($row = mysql_fetch_assoc($result))
221 {
222 $resource_data_array[] = $row; //Assign the data.
223 $resource_search_array[] = $row["acftsimid"]; //Set the search index.
224 }
225
226 //Free memory.
227 mysql_free_result($result);
228 }
229 }
230 //
231 //--------------------------------------------------------------------------------------------------------------
232 //Extracts the records pertaining to a certain flight instructor from an array returned from
233 //the RESV_resvns_in_time_window() function, using the search array as a search aid. Returns FALSE
234 //if no match.
235 //
236 //Records must not have been rearranged (they must still be sorted by the flight instructor ID).
237 //
238 function RESV_extract_finst_records($data_array_in, $search_array_in, $idx_to_find_in)
239 {
240 //If the data array or search array are FALSE, then the result is FALSE, i.e. subset of the
241 //empty set is also the empty set.
242 if (($data_array_in === FALSE) || ($search_array_in === FALSE))
243 {
244 return(FALSE);
245 }
246
247 //Find the first record with the passed index, if any. This is enough, as the others will be contiguous.
248 $index = array_search($idx_to_find_in, $search_array_in);
249
250 //If there is no match, return FALSE.
251 if (($index === FALSE) || ($index === NULL))
252 {
253 return(FALSE);
254 }
255
256 //If we're here, we have success. Find out how many elements in the array, for reference.
257 $n = count($data_array_in);
258
259 //Tack the original search success onto the return value.
260 $rv[] = $data_array_in[$index];
261
262 //Find any others.
263 $index++;
264 while (($index < $n) && ($search_array_in[$index] == $idx_to_find_in))
265 {
266 $rv[] = $data_array_in[$index];
267 $index++;
268 }
269
270 //Return the results.
271 return($rv);
272 }
273 //
274 //--------------------------------------------------------------------------------------------------------------
275 //Extracts the records pertaining to a certain resource (aircraft/simulator) from an array returned from
276 //the RESV_resvns_in_time_window() function, using the search array as a search aid. Returns FALSE
277 //if no match.
278 //
279 //Records must not have been rearranged (they must still be sorted by the resource ID).
280 //
281 function RESV_extract_resource_records($data_array_in, $search_array_in, $idx_to_find_in)
282 {
283 //If the data array or search array are FALSE, then the result is FALSE, i.e. subset of the
284 //empty set is also the empty set.
285 if (($data_array_in === FALSE) || ($search_array_in === FALSE))
286 {
287 return(FALSE);
288 }
289
290 //Find the first record with the passed index, if any. This is enough, as the others will be contiguous.
291 $index = array_search($idx_to_find_in, $search_array_in);
292
293 //If there is no match, return FALSE.
294 if (($index === FALSE) || ($index === NULL))
295 {
296 return(FALSE);
297 }
298
299 //If we're here, we have success. Find out how many elements in the array, for reference.
300 $n = count($data_array_in);
301
302 //Tack the original search success onto the return value.
303 $rv[] = $data_array_in[$index];
304
305 //Find any others.
306 $index++;
307 while (($index < $n) && ($search_array_in[$index] == $idx_to_find_in))
308 {
309 $rv[] = $data_array_in[$index];
310 $index++;
311 }
312
313 //Return the results.
314 return($rv);
315 }
316 //
317 //--------------------------------------------------------------------------------------------------------------
318 //End of $RCSfile: resv.inc,v $.
319 //--------------------------------------------------------------------------------------------------------------
320 ?>

dashley@gmail.com
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