loncom/interface/loncoursedata.pm - view

File: [LON-CAPA] / loncom / interface / loncoursedata.pm
Revision 1.89: download - view: text, annotated - select for diffs
Fri Sep 26 18:31:31 2003 UTC (20 years, 9 months ago) by matthew
Branches: MAIN
CVS tags: HEAD

Implement storing of student performance data in the MySQL cache database.
Added 3 tables: $fulldump_part_table, $fulldump_response_table, and
$fulldump_timestamp_table.  Added &update_full_student_data to do a
lonnet::dump, load the data into the new tables, and then update the old
tables used for Chart, Spreadsheet, and the current implementation of
Statistics.  Reworked some existing code to avoid duplication.

1: # The LearningOnline Network with CAPA 2: # 3: # $Id: loncoursedata.pm,v 1.89 2003/09/26 18:31:31 matthew Exp $ 4: # 5: # Copyright Michigan State University Board of Trustees 6: # 7: # This file is part of the LearningOnline Network with CAPA (LON-CAPA). 8: # 9: # LON-CAPA is free software; you can redistribute it and/or modify 10: # it under the terms of the GNU General Public License as published by 11: # the Free Software Foundation; either version 2 of the License, or 12: # (at your option) any later version. 13: # 14: # LON-CAPA is distributed in the hope that it will be useful, 15: # but WITHOUT ANY WARRANTY; without even the implied warranty of 16: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17: # GNU General Public License for more details. 18: # 19: # You should have received a copy of the GNU General Public License 20: # along with LON-CAPA; if not, write to the Free Software 21: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 22: # 23: # /home/httpd/html/adm/gpl.txt 24: # 25: # http://www.lon-capa.org/ 26: # 27: ### 28: 29: =pod 30: 31: =head1 NAME 32: 33: loncoursedata 34: 35: =head1 SYNOPSIS 36: 37: Set of functions that download and process student and course information. 38: 39: =head1 PACKAGES USED 40: 41: Apache::Constants qw(:common :http) 42: Apache::lonnet() 43: Apache::lonhtmlcommon 44: HTML::TokeParser 45: GDBM_File 46: 47: =cut 48: 49: package Apache::loncoursedata; 50: 51: use strict; 52: use Apache::Constants qw(:common :http); 53: use Apache::lonnet(); 54: use Apache::lonhtmlcommon; 55: use Time::HiRes; 56: use Apache::lonmysql; 57: use HTML::TokeParser; 58: use GDBM_File; 59: 60: =pod 61: 62: =head1 DOWNLOAD INFORMATION 63: 64: This section contains all the functions that get data from other servers 65: and/or itself. 66: 67: =cut 68: 69: #################################################### 70: #################################################### 71: 72: =pod 73: 74: =item &get_sequence_assessment_data() 75: 76: AT THIS TIME THE USE OF THIS FUNCTION IS *NOT* RECOMMENDED 77: 78: Use lonnavmaps to build a data structure describing the order and 79: assessment contents of each sequence in the current course. 80: 81: The returned structure is a hash reference. 82: 83: { title => 'title', 84: symb => 'symb', 85: src => '/s/o/u/r/c/e', 86: type => (container|assessment), 87: num_assess => 2, # only for container 88: parts => [11,13,15], # only for assessment 89: response_ids => [12,14,16], # only for assessment 90: contents => [........] # only for container 91: } 92: 93: $hash->{'contents'} is a reference to an array of hashes of the same structure. 94: 95: Also returned are array references to the sequences and assessments contained 96: in the course. 97: 98: 99: =cut 100: 101: #################################################### 102: #################################################### 103: sub get_sequence_assessment_data { 104: my $fn=$ENV{'request.course.fn'}; 105: ## 106: ## use navmaps 107: my $navmap = Apache::lonnavmaps::navmap->new(); 108: if (!defined($navmap)) { 109: return 'Can not open Coursemap'; 110: } 111: # We explicity grab the top level map because I am not sure we 112: # are pulling it from the iterator. 113: my $top_level_map = $navmap->getById('0.0'); 114: # 115: my $iterator = $navmap->getIterator(undef, undef, undef, 1); 116: my $curRes = $iterator->next(); # Top level sequence 117: ## 118: ## Prime the pump 119: ## 120: ## We are going to loop until we run out of sequences/pages to explore for 121: ## resources. This means we have to start out with something to look 122: ## at. 123: my $title = $ENV{'course.'.$ENV{'request.course.id'}.'.description'}; 124: my $symb = $top_level_map->symb(); 125: my $src = $top_level_map->src(); 126: my $randompick = $top_level_map->randompick(); 127: # 128: my @Sequences; 129: my @Assessments; 130: my @Nested_Sequences = (); # Stack of sequences, keeps track of depth 131: my $top = { title => $title, 132: src => $src, 133: symb => $symb, 134: type => 'container', 135: num_assess => 0, 136: num_assess_parts => 0, 137: contents => [], 138: randompick => $randompick, 139: }; 140: push (@Sequences,$top); 141: push (@Nested_Sequences, $top); 142: # 143: # We need to keep track of which sequences contain homework problems 144: # 145: my $previous_too; 146: my $previous; 147: while (scalar(@Nested_Sequences)) { 148: $previous_too = $previous; 149: $previous = $curRes; 150: $curRes = $iterator->next(); 151: my $currentmap = $Nested_Sequences[-1]; # Last one on the stack 152: if ($curRes == $iterator->BEGIN_MAP()) { 153: if (! ref($previous)) { 154: $previous = $previous_too; 155: } 156: if (! ref($previous)) { 157: next; 158: } 159: # get the map itself, instead of BEGIN_MAP 160: $title = $previous->title(); 161: $title =~ s/\&colon;/\&\#058;/g; 162: $symb = $previous->symb(); 163: $src = $previous->src(); 164: # pick up the filename if there is no title available 165: if (! defined($title) || $title eq '') { 166: ($title) = ($src=~/\/([^\/]*)$/); 167: } 168: $randompick = $previous->randompick(); 169: my $newmap = { title => $title, 170: src => $src, 171: symb => $symb, 172: type => 'container', 173: num_assess => 0, 174: randompick => $randompick, 175: contents => [], 176: }; 177: push (@{$currentmap->{'contents'}},$newmap); # this is permanent 178: push (@Sequences,$newmap); 179: push (@Nested_Sequences, $newmap); # this is a stack 180: next; 181: } 182: if ($curRes == $iterator->END_MAP()) { 183: pop(@Nested_Sequences); 184: next; 185: } 186: next if (! ref($curRes)); 187: next if (! $curRes->is_problem());# && !$curRes->randomout); 188: # Okay, from here on out we only deal with assessments 189: $title = $curRes->title(); 190: $title =~ s/\&colon;/\&\#058;/g; 191: $symb = $curRes->symb(); 192: $src = $curRes->src(); 193: my $parts = $curRes->parts(); 194: my %partdata; 195: foreach my $part (@$parts) { 196: my @Responses = $curRes->responseType($part); 197: my @Ids = $curRes->responseIds($part); 198: $partdata{$part}->{'ResponseTypes'}= \@Responses; 199: $partdata{$part}->{'ResponseIds'} = \@Ids; 200: } 201: my $assessment = { title => $title, 202: src => $src, 203: symb => $symb, 204: type => 'assessment', 205: parts => $parts, 206: num_parts => scalar(@$parts), 207: partdata => \%partdata, 208: }; 209: push(@Assessments,$assessment); 210: push(@{$currentmap->{'contents'}},$assessment); 211: $currentmap->{'num_assess'}++; 212: $currentmap->{'num_assess_parts'}+= scalar(@$parts); 213: } 214: $navmap->untieHashes(); 215: return ($top,\@Sequences,\@Assessments); 216: } 217: 218: sub LoadDiscussion { 219: my ($courseID)=@_; 220: my %Discuss=(); 221: my %contrib=&Apache::lonnet::dump( 222: $courseID, 223: $ENV{'course.'.$courseID.'.domain'}, 224: $ENV{'course.'.$courseID.'.num'}); 225: 226: #my %contrib=&DownloadCourseInformation($name, $courseID, 0); 227: 228: foreach my $temp(keys %contrib) { 229: if ($temp=~/^version/) { 230: my $ver=$contrib{$temp}; 231: my ($dummy,$prb)=split(':',$temp); 232: for (my $idx=1; $idx<=$ver; $idx++ ) { 233: my $name=$contrib{"$idx:$prb:sendername"}; 234: $Discuss{"$name:$prb"}=$idx; 235: } 236: } 237: } 238: 239: return \%Discuss; 240: } 241: 242: ################################################ 243: ################################################ 244: 245: =pod 246: 247: =item &GetUserName(username,userdomain) 248: 249: Returns a hash with the following entries: 250: 'firstname', 'middlename', 'lastname', 'generation', and 'fullname' 251: 252: 'fullname' is the result of &Apache::loncoursedata::ProcessFullName. 253: 254: =cut 255: 256: ################################################ 257: ################################################ 258: sub GetUserName { 259: my ($username,$userdomain) = @_; 260: $username = $ENV{'user.name'} if (! defined($username)); 261: $userdomain = $ENV{'user.domain'} if (! defined($username)); 262: my %userenv = &Apache::lonnet::get('environment', 263: ['firstname','middlename','lastname','generation'], 264: $userdomain,$username); 265: $userenv{'fullname'} = &ProcessFullName($userenv{'lastname'}, 266: $userenv{'generation'}, 267: $userenv{'firstname'}, 268: $userenv{'middlename'}); 269: return %userenv; 270: } 271: 272: ################################################ 273: ################################################ 274: 275: =pod 276: 277: =item &ProcessFullName() 278: 279: Takes lastname, generation, firstname, and middlename (or some partial 280: set of this data) and returns the full name version as a string. Format 281: is Lastname generation, firstname middlename or a subset of this. 282: 283: =cut 284: 285: ################################################ 286: ################################################ 287: sub ProcessFullName { 288: my ($lastname, $generation, $firstname, $middlename)=@_; 289: my $Str = ''; 290: 291: # Strip whitespace preceeding & following name components. 292: $lastname =~ s/(\s+$|^\s+)//g; 293: $generation =~ s/(\s+$|^\s+)//g; 294: $firstname =~ s/(\s+$|^\s+)//g; 295: $middlename =~ s/(\s+$|^\s+)//g; 296: 297: if($lastname ne '') { 298: $Str .= $lastname; 299: $Str .= ' '.$generation if ($generation ne ''); 300: $Str .= ','; 301: $Str .= ' '.$firstname if ($firstname ne ''); 302: $Str .= ' '.$middlename if ($middlename ne ''); 303: } else { 304: $Str .= $firstname if ($firstname ne ''); 305: $Str .= ' '.$middlename if ($middlename ne ''); 306: $Str .= ' '.$generation if ($generation ne ''); 307: } 308: 309: return $Str; 310: } 311: 312: ################################################ 313: ################################################ 314: 315: =pod 316: 317: =item &make_into_hash($values); 318: 319: Returns a reference to a hash as described by $values. $values is 320: assumed to be the result of 321: join(':',map {&Apache::lonnet::escape($_)} %orighash); 322: 323: This is a helper function for get_current_state. 324: 325: =cut 326: 327: ################################################ 328: ################################################ 329: sub make_into_hash { 330: my $values = shift; 331: my %tmp = map { &Apache::lonnet::unescape($_); } 332: split(':',$values); 333: return \%tmp; 334: } 335: 336: 337: ################################################ 338: ################################################ 339: 340: =pod 341: 342: =head1 LOCAL DATA CACHING SUBROUTINES 343: 344: The local caching is done using MySQL. There is no fall-back implementation 345: if MySQL is not running. 346: 347: The programmers interface is to call &get_current_state() or some other 348: primary interface subroutine (described below). The internals of this 349: storage system are documented here. 350: 351: There are six tables used to store student performance data (the results of 352: a dumpcurrent). Each of these tables is created in MySQL with a name of 353: $courseid_*****, where ***** is 'symb', 'part', or whatever is appropriate 354: for the table. The tables and their purposes are described below. 355: 356: Some notes before we get started. 357: 358: Each table must have a PRIMARY KEY, which is a column or set of columns which 359: will serve to uniquely identify a row of data. NULL is not allowed! 360: 361: INDEXes work best on integer data. 362: 363: JOIN is used to combine data from many tables into one output. 364: 365: lonmysql.pm is used for some of the interface, specifically the table creation 366: calls. The inserts are done in bulk by directly calling the database handler. 367: The SELECT ... JOIN statement used to retrieve the data does not have an 368: interface in lonmysql.pm and I shudder at the thought of writing one. 369: 370: =head3 Table Descriptions 371: 372: =over 4 373: 374: =item Tables used to store meta information 375: 376: The following tables hold data required to keep track of the current status 377: of a students data in the tables or to look up the students data in the tables. 378: 379: =over 4 380: 381: =item $symb_table 382: 383: The symb_table has two columns. The first is a 'symb_id' and the second 384: is the text name for the 'symb' (limited to 64k). The 'symb_id' is generated 385: automatically by MySQL so inserts should be done on this table with an 386: empty first element. This table has its PRIMARY KEY on the 'symb_id'. 387: 388: =item $part_table 389: 390: The part_table has two columns. The first is a 'part_id' and the second 391: is the text name for the 'part' (limited to 100 characters). The 'part_id' is 392: generated automatically by MySQL so inserts should be done on this table with 393: an empty first element. This table has its PRIMARY KEY on the 'part' (100 394: characters) and a KEY on 'part_id'. 395: 396: =item $student_table 397: 398: The student_table has two columns. The first is a 'student_id' and the second 399: is the text description of the 'student' (typically username:domain) (less 400: than 100 characters). The 'student_id' is automatically generated by MySQL. 401: The use of the name 'student_id' is loaded, I know, but this ID is used ONLY 402: internally to the MySQL database and is not the same as the students ID 403: (stored in the students environment). This table has its PRIMARY KEY on the 404: 'student' (100 characters). 405: 406: =item $studentdata_table 407: 408: The studentdata_table has four columns: 'student_id' (the unique id of 409: the student), 'updatetime' (the time the students data was last updated), 410: 'fullupdatetime' (the time the students full data was last updated), 411: 'section', and 'classification'( the students current classification). 412: This table has its PRIMARY KEY on 'student_id'. 413: 414: =back 415: 416: =item Tables used to store current status data 417: 418: The following tables store data only about the students current status on 419: a problem, meaning only the data related to the last attempt on a problem. 420: 421: =over 4 422: 423: =item $performance_table 424: 425: The performance_table has 9 columns. The first three are 'symb_id', 426: 'student_id', and 'part_id'. These comprise the PRIMARY KEY for this table 427: and are directly related to the $symb_table, $student_table, and $part_table 428: described above. MySQL does better indexing on numeric items than text, 429: so we use these three "index tables". The remaining columns are 430: 'solved', 'tries', 'awarded', 'award', 'awarddetail', and 'timestamp'. 431: These are either the MySQL type TINYTEXT or various integers ('tries' and 432: 'timestamp'). This table has KEYs of 'student_id' and 'symb_id'. 433: For use of this table, see the functions described below. 434: 435: =item $parameters_table 436: 437: The parameters_table holds the data that does not fit neatly into the 438: performance_table. The parameters table has four columns: 'symb_id', 439: 'student_id', 'parameter', and 'value'. 'symb_id', 'student_id', and 440: 'parameter' comprise the PRIMARY KEY for this table. 'parameter' is 441: limited to 255 characters. 'value' is limited to 64k characters. 442: 443: =back 444: 445: =item Tables used for storing historic data 446: 447: The following tables are used to store almost all of the transactions a student 448: has made on a homework problem. See loncapa/docs/homework/datastorage for 449: specific information about each of the parameters stored. 450: 451: =over 4 452: 453: =item $fulldump_response_table 454: 455: The response table holds data (documented in loncapa/docs/homework/datastorage) 456: associated with a particular response id which is stored when a student 457: attempts a problem. The following are the columns of the table, in order: 458: 'symb_id','part_id','response_id','student_id','transaction','tries', 459: 'awarddetail', 'awarded','response_specific' (data particular to the response 460: type), 'response_specific_value', and 'submission (the text of the students 461: submission). The primary key is based on the first five columns listed above. 462: 463: =item $fulldump_part_table 464: 465: The part table holds data (documented in loncapa/docs/homework/datastorage) 466: associated with a particular part id which is stored when a student attempts 467: a problem. The following are the columns of the table, in order: 468: 'symb_id','part_id','student_id','transaction','tries','award','awarded', 469: and 'previous'. The primary key is based on the first five columns listed 470: above. 471: 472: =item $fulldump_timestamp_table 473: 474: The timestamp table holds the timestamps of the transactions which are 475: stored in $fulldump_response_table and $fulldump_part_table. This data is 476: about both the response and part data. Columns: 'symb_id','student_id', 477: 'transaction', and 'timestamp'. 478: The primary key is based on the first 3 columns. 479: 480: =back 481: 482: =back 483: 484: =head3 Important Subroutines 485: 486: Here is a brief overview of the subroutines which are likely to be of 487: interest: 488: 489: =over 4 490: 491: =item &get_current_state(): programmers interface. 492: 493: =item &init_dbs(): table creation 494: 495: =item &update_student_data(): data storage calls 496: 497: =item &get_student_data_from_performance_cache(): data retrieval 498: 499: =back 500: 501: =head3 Main Documentation 502: 503: =over 4 504: 505: =cut 506: 507: ################################################ 508: ################################################ 509: 510: ################################################ 511: ################################################ 512: { # Begin scope of table identifiers 513: 514: my $current_course =''; 515: my $symb_table; 516: my $part_table; 517: my $student_table; 518: my $studentdata_table; 519: my $performance_table; 520: my $parameters_table; 521: my $fulldump_response_table; 522: my $fulldump_part_table; 523: my $fulldump_timestamp_table; 524: 525: my @Tables; 526: ################################################ 527: ################################################ 528: 529: =pod 530: 531: =item &init_dbs() 532: 533: Input: course id 534: 535: Output: 0 on success, positive integer on error 536: 537: This routine issues the calls to lonmysql to create the tables used to 538: store student data. 539: 540: =cut 541: 542: ################################################ 543: ################################################ 544: sub init_dbs { 545: my $courseid = shift; 546: &setup_table_names($courseid); 547: # 548: # Drop any of the existing tables 549: foreach my $table (@Tables) { 550: &Apache::lonmysql::drop_table($table); 551: } 552: # 553: # Note - changes to this table must be reflected in the code that 554: # stores the data (calls &Apache::lonmysql::store_row with this table 555: # id 556: my $symb_table_def = { 557: id => $symb_table, 558: permanent => 'no', 559: columns => [{ name => 'symb_id', 560: type => 'MEDIUMINT UNSIGNED', 561: restrictions => 'NOT NULL', 562: auto_inc => 'yes', }, 563: { name => 'symb', 564: type => 'MEDIUMTEXT', 565: restrictions => 'NOT NULL'}, 566: ], 567: 'PRIMARY KEY' => ['symb_id'], 568: }; 569: # 570: my $part_table_def = { 571: id => $part_table, 572: permanent => 'no', 573: columns => [{ name => 'part_id', 574: type => 'MEDIUMINT UNSIGNED', 575: restrictions => 'NOT NULL', 576: auto_inc => 'yes', }, 577: { name => 'part', 578: type => 'VARCHAR(100)', 579: restrictions => 'NOT NULL'}, 580: ], 581: 'PRIMARY KEY' => ['part (100)'], 582: 'KEY' => [{ columns => ['part_id']},], 583: }; 584: # 585: my $student_table_def = { 586: id => $student_table, 587: permanent => 'no', 588: columns => [{ name => 'student_id', 589: type => 'MEDIUMINT UNSIGNED', 590: restrictions => 'NOT NULL', 591: auto_inc => 'yes', }, 592: { name => 'student', 593: type => 'VARCHAR(100)', 594: restrictions => 'NOT NULL'}, 595: { name => 'classification', 596: type => 'varchar(100)', }, 597: ], 598: 'PRIMARY KEY' => ['student (100)'], 599: 'KEY' => [{ columns => ['student_id']},], 600: }; 601: # 602: my $studentdata_table_def = { 603: id => $studentdata_table, 604: permanent => 'no', 605: columns => [{ name => 'student_id', 606: type => 'MEDIUMINT UNSIGNED', 607: restrictions => 'NOT NULL UNIQUE',}, 608: { name => 'updatetime', 609: type => 'INT UNSIGNED'}, 610: { name => 'fullupdatetime', 611: type => 'INT UNSIGNED'}, 612: { name => 'section', 613: type => 'VARCHAR(100)'}, 614: { name => 'classification', 615: type => 'VARCHAR(100)', }, 616: ], 617: 'PRIMARY KEY' => ['student_id'], 618: }; 619: # 620: my $performance_table_def = { 621: id => $performance_table, 622: permanent => 'no', 623: columns => [{ name => 'symb_id', 624: type => 'MEDIUMINT UNSIGNED', 625: restrictions => 'NOT NULL' }, 626: { name => 'student_id', 627: type => 'MEDIUMINT UNSIGNED', 628: restrictions => 'NOT NULL' }, 629: { name => 'part_id', 630: type => 'MEDIUMINT UNSIGNED', 631: restrictions => 'NOT NULL' }, 632: { name => 'part', 633: type => 'VARCHAR(100)', 634: restrictions => 'NOT NULL'}, 635: { name => 'solved', 636: type => 'TINYTEXT' }, 637: { name => 'tries', 638: type => 'SMALLINT UNSIGNED' }, 639: { name => 'awarded', 640: type => 'TINYTEXT' }, 641: { name => 'award', 642: type => 'TINYTEXT' }, 643: { name => 'awarddetail', 644: type => 'TINYTEXT' }, 645: { name => 'timestamp', 646: type => 'INT UNSIGNED'}, 647: ], 648: 'PRIMARY KEY' => ['symb_id','student_id','part_id'], 649: 'KEY' => [{ columns=>['student_id'] }, 650: { columns=>['symb_id'] },], 651: }; 652: # 653: my $fulldump_part_table_def = { 654: id => $fulldump_part_table, 655: permanent => 'no', 656: columns => [ 657: { name => 'symb_id', 658: type => 'MEDIUMINT UNSIGNED', 659: restrictions => 'NOT NULL' }, 660: { name => 'part_id', 661: type => 'MEDIUMINT UNSIGNED', 662: restrictions => 'NOT NULL' }, 663: { name => 'student_id', 664: type => 'MEDIUMINT UNSIGNED', 665: restrictions => 'NOT NULL' }, 666: { name => 'transaction', 667: type => 'MEDIUMINT UNSIGNED', 668: restrictions => 'NOT NULL' }, 669: { name => 'tries', 670: type => 'SMALLINT UNSIGNED', 671: restrictions => 'NOT NULL' }, 672: { name => 'award', 673: type => 'TINYTEXT' }, 674: { name => 'awarded', 675: type => 'TINYTEXT' }, 676: { name => 'previous', 677: type => 'SMALLINT UNSIGNED' }, 678: # { name => 'regrader', 679: # type => 'TINYTEXT' }, 680: # { name => 'afterduedate', 681: # type => 'TINYTEXT' }, 682: ], 683: 'PRIMARY KEY' => ['symb_id','part_id','student_id','transaction'], 684: 'KEY' => [ 685: { columns=>['symb_id'] }, 686: { columns=>['part_id'] }, 687: { columns=>['student_id'] }, 688: ], 689: }; 690: # 691: my $fulldump_response_table_def = { 692: id => $fulldump_response_table, 693: permanent => 'no', 694: columns => [ 695: { name => 'symb_id', 696: type => 'MEDIUMINT UNSIGNED', 697: restrictions => 'NOT NULL' }, 698: { name => 'part_id', 699: type => 'MEDIUMINT UNSIGNED', 700: restrictions => 'NOT NULL' }, 701: { name => 'response_id', 702: type => 'MEDIUMINT UNSIGNED', 703: restrictions => 'NOT NULL' }, 704: { name => 'student_id', 705: type => 'MEDIUMINT UNSIGNED', 706: restrictions => 'NOT NULL' }, 707: { name => 'transaction', 708: type => 'MEDIUMINT UNSIGNED', 709: restrictions => 'NOT NULL' }, 710: { name => 'tries', 711: type => 'SMALLINT UNSIGNED', 712: restrictions => 'NOT NULL' }, 713: { name => 'awarddetail', 714: type => 'TINYTEXT' }, 715: { name => 'awarded', 716: type => 'TINYTEXT' }, 717: # { name => 'message', 718: # type => 'CHAR' }, 719: { name => 'response_specific', 720: type => 'TINYTEXT' }, 721: { name => 'response_specific_value', 722: type => 'TINYTEXT' }, 723: { name => 'submission', 724: type => 'TEXT'}, 725: ], 726: 'PRIMARY KEY' => ['symb_id','part_id','response_id','student_id', 727: 'transaction'], 728: 'KEY' => [ 729: { columns=>['symb_id'] }, 730: { columns=>['part_id','response_id'] }, 731: { columns=>['student_id'] }, 732: ], 733: }; 734: my $fulldump_timestamp_table_def = { 735: id => $fulldump_timestamp_table, 736: permanent => 'no', 737: columns => [ 738: { name => 'symb_id', 739: type => 'MEDIUMINT UNSIGNED', 740: restrictions => 'NOT NULL' }, 741: { name => 'student_id', 742: type => 'MEDIUMINT UNSIGNED', 743: restrictions => 'NOT NULL' }, 744: { name => 'transaction', 745: type => 'MEDIUMINT UNSIGNED', 746: restrictions => 'NOT NULL' }, 747: { name => 'timestamp', 748: type => 'INT UNSIGNED'}, 749: ], 750: 'PRIMARY KEY' => ['symb_id','student_id','transaction'], 751: 'KEY' => [ 752: { columns=>['symb_id'] }, 753: { columns=>['student_id'] }, 754: { columns=>['transaction'] }, 755: ], 756: }; 757: 758: # 759: my $parameters_table_def = { 760: id => $parameters_table, 761: permanent => 'no', 762: columns => [{ name => 'symb_id', 763: type => 'MEDIUMINT UNSIGNED', 764: restrictions => 'NOT NULL' }, 765: { name => 'student_id', 766: type => 'MEDIUMINT UNSIGNED', 767: restrictions => 'NOT NULL' }, 768: { name => 'parameter', 769: type => 'TINYTEXT', 770: restrictions => 'NOT NULL' }, 771: { name => 'value', 772: type => 'MEDIUMTEXT' }, 773: ], 774: 'PRIMARY KEY' => ['symb_id','student_id','parameter (255)'], 775: }; 776: # 777: # Create the tables 778: my $tableid; 779: $tableid = &Apache::lonmysql::create_table($symb_table_def); 780: if (! defined($tableid)) { 781: &Apache::lonnet::logthis("error creating symb_table: ". 782: &Apache::lonmysql::get_error()); 783: return 1; 784: } 785: # 786: $tableid = &Apache::lonmysql::create_table($part_table_def); 787: if (! defined($tableid)) { 788: &Apache::lonnet::logthis("error creating part_table: ". 789: &Apache::lonmysql::get_error()); 790: return 2; 791: } 792: # 793: $tableid = &Apache::lonmysql::create_table($student_table_def); 794: if (! defined($tableid)) { 795: &Apache::lonnet::logthis("error creating student_table: ". 796: &Apache::lonmysql::get_error()); 797: return 3; 798: } 799: # 800: $tableid = &Apache::lonmysql::create_table($studentdata_table_def); 801: if (! defined($tableid)) { 802: &Apache::lonnet::logthis("error creating studentdata_table: ". 803: &Apache::lonmysql::get_error()); 804: return 4; 805: } 806: # 807: $tableid = &Apache::lonmysql::create_table($performance_table_def); 808: if (! defined($tableid)) { 809: &Apache::lonnet::logthis("error creating preformance_table: ". 810: &Apache::lonmysql::get_error()); 811: return 5; 812: } 813: # 814: $tableid = &Apache::lonmysql::create_table($parameters_table_def); 815: if (! defined($tableid)) { 816: &Apache::lonnet::logthis("error creating parameters_table: ". 817: &Apache::lonmysql::get_error()); 818: return 6; 819: } 820: # 821: $tableid = &Apache::lonmysql::create_table($fulldump_part_table_def); 822: if (! defined($tableid)) { 823: &Apache::lonnet::logthis("error creating fulldump_part_table: ". 824: &Apache::lonmysql::get_error()); 825: return 7; 826: } 827: # 828: $tableid = &Apache::lonmysql::create_table($fulldump_response_table_def); 829: if (! defined($tableid)) { 830: &Apache::lonnet::logthis("error creating fulldump_response_table: ". 831: &Apache::lonmysql::get_error()); 832: return 8; 833: } 834: $tableid = &Apache::lonmysql::create_table($fulldump_timestamp_table_def); 835: if (! defined($tableid)) { 836: &Apache::lonnet::logthis("error creating fulldump_timestamp_table: ". 837: &Apache::lonmysql::get_error()); 838: return 9; 839: } 840: return 0; 841: } 842: 843: ################################################ 844: ################################################ 845: 846: =pod 847: 848: =item &delete_caches() 849: 850: =cut 851: 852: ################################################ 853: ################################################ 854: sub delete_caches { 855: my $courseid = shift; 856: $courseid = $ENV{'request.course.id'} if (! defined($courseid)); 857: # 858: &setup_table_names($courseid); 859: # 860: my $dbh = &Apache::lonmysql::get_dbh(); 861: foreach my $table (@Tables) { 862: my $command = 'DROP TABLE '.$table.';'; 863: $dbh->do($command); 864: if ($dbh->err) { 865: &Apache::lonnet::logthis($command.' resulted in error: '.$dbh->errstr); 866: } 867: } 868: return; 869: } 870: 871: ################################################ 872: ################################################ 873: 874: =pod 875: 876: =item &get_part_id() 877: 878: Get the MySQL id of a problem part string. 879: 880: Input: $part 881: 882: Output: undef on error, integer $part_id on success. 883: 884: =item &get_part() 885: 886: Get the string describing a part from the MySQL id of the problem part. 887: 888: Input: $part_id 889: 890: Output: undef on error, $part string on success. 891: 892: =cut 893: 894: ################################################ 895: ################################################ 896: 897: my $have_read_part_table = 0; 898: my %ids_by_part; 899: my %parts_by_id; 900: 901: sub get_part_id { 902: my ($part) = @_; 903: $part = 0 if (! defined($part)); 904: if (! $have_read_part_table) { 905: my @Result = &Apache::lonmysql::get_rows($part_table); 906: foreach (@Result) { 907: $ids_by_part{$_->[1]}=$_->[0]; 908: } 909: $have_read_part_table = 1; 910: } 911: if (! exists($ids_by_part{$part})) { 912: &Apache::lonmysql::store_row($part_table,[undef,$part]); 913: undef(%ids_by_part); 914: my @Result = &Apache::lonmysql::get_rows($part_table); 915: foreach (@Result) { 916: $ids_by_part{$_->[1]}=$_->[0]; 917: } 918: } 919: return $ids_by_part{$part} if (exists($ids_by_part{$part})); 920: return undef; # error 921: } 922: 923: sub get_part { 924: my ($part_id) = @_; 925: if (! exists($parts_by_id{$part_id}) || 926: ! defined($parts_by_id{$part_id}) || 927: $parts_by_id{$part_id} eq '') { 928: my @Result = &Apache::lonmysql::get_rows($part_table); 929: foreach (@Result) { 930: $parts_by_id{$_->[0]}=$_->[1]; 931: } 932: } 933: return $parts_by_id{$part_id} if(exists($parts_by_id{$part_id})); 934: return undef; # error 935: } 936: 937: ################################################ 938: ################################################ 939: 940: =pod 941: 942: =item &get_symb_id() 943: 944: Get the MySQL id of a symb. 945: 946: Input: $symb 947: 948: Output: undef on error, integer $symb_id on success. 949: 950: =item &get_symb() 951: 952: Get the symb associated with a MySQL symb_id. 953: 954: Input: $symb_id 955: 956: Output: undef on error, $symb on success. 957: 958: =cut 959: 960: ################################################ 961: ################################################ 962: 963: my $have_read_symb_table = 0; 964: my %ids_by_symb; 965: my %symbs_by_id; 966: 967: sub get_symb_id { 968: my ($symb) = @_; 969: if (! $have_read_symb_table) { 970: my @Result = &Apache::lonmysql::get_rows($symb_table); 971: foreach (@Result) { 972: $ids_by_symb{$_->[1]}=$_->[0]; 973: } 974: $have_read_symb_table = 1; 975: } 976: if (! exists($ids_by_symb{$symb})) { 977: &Apache::lonmysql::store_row($symb_table,[undef,$symb]); 978: undef(%ids_by_symb); 979: my @Result = &Apache::lonmysql::get_rows($symb_table); 980: foreach (@Result) { 981: $ids_by_symb{$_->[1]}=$_->[0]; 982: } 983: } 984: return $ids_by_symb{$symb} if(exists( $ids_by_symb{$symb})); 985: return undef; # error 986: } 987: 988: sub get_symb { 989: my ($symb_id) = @_; 990: if (! exists($symbs_by_id{$symb_id}) || 991: ! defined($symbs_by_id{$symb_id}) || 992: $symbs_by_id{$symb_id} eq '') { 993: my @Result = &Apache::lonmysql::get_rows($symb_table); 994: foreach (@Result) { 995: $symbs_by_id{$_->[0]}=$_->[1]; 996: } 997: } 998: return $symbs_by_id{$symb_id} if(exists( $symbs_by_id{$symb_id})); 999: return undef; # error 1000: } 1001: 1002: ################################################ 1003: ################################################ 1004: 1005: =pod 1006: 1007: =item &get_student_id() 1008: 1009: Get the MySQL id of a student. 1010: 1011: Input: $sname, $dom 1012: 1013: Output: undef on error, integer $student_id on success. 1014: 1015: =item &get_student() 1016: 1017: Get student username:domain associated with the MySQL student_id. 1018: 1019: Input: $student_id 1020: 1021: Output: undef on error, string $student (username:domain) on success. 1022: 1023: =cut 1024: 1025: ################################################ 1026: ################################################ 1027: 1028: my $have_read_student_table = 0; 1029: my %ids_by_student; 1030: my %students_by_id; 1031: 1032: sub get_student_id { 1033: my ($sname,$sdom) = @_; 1034: my $student = $sname.':'.$sdom; 1035: if (! $have_read_student_table) { 1036: my @Result = &Apache::lonmysql::get_rows($student_table); 1037: foreach (@Result) { 1038: $ids_by_student{$_->[1]}=$_->[0]; 1039: } 1040: $have_read_student_table = 1; 1041: } 1042: if (! exists($ids_by_student{$student})) { 1043: &Apache::lonmysql::store_row($student_table,[undef,$student,undef]); 1044: undef(%ids_by_student); 1045: my @Result = &Apache::lonmysql::get_rows($student_table); 1046: foreach (@Result) { 1047: $ids_by_student{$_->[1]}=$_->[0]; 1048: } 1049: } 1050: return $ids_by_student{$student} if(exists( $ids_by_student{$student})); 1051: return undef; # error 1052: } 1053: 1054: sub get_student { 1055: my ($student_id) = @_; 1056: if (! exists($students_by_id{$student_id}) || 1057: ! defined($students_by_id{$student_id}) || 1058: $students_by_id{$student_id} eq '') { 1059: my @Result = &Apache::lonmysql::get_rows($student_table); 1060: foreach (@Result) { 1061: $students_by_id{$_->[0]}=$_->[1]; 1062: } 1063: } 1064: return $students_by_id{$student_id} if(exists($students_by_id{$student_id})); 1065: return undef; # error 1066: } 1067: 1068: ################################################ 1069: ################################################ 1070: 1071: =pod 1072: 1073: =item &update_full_student_data($sname,$sdom,$courseid) 1074: 1075: Does a lonnet::dump on a student to populate the courses tables. 1076: 1077: Input: $sname, $sdom, $courseid 1078: 1079: Output: $returnstatus 1080: 1081: $returnstatus is a string describing any errors that occured. 'okay' is the 1082: default. 1083: 1084: This subroutine loads a students data using lonnet::dump and inserts 1085: it into the MySQL database. The inserts are done on three tables, 1086: $fulldump_response_table, $fulldump_part_table, and $fulldump_timestamp_table. 1087: The INSERT calls are made directly by this subroutine, not through lonmysql 1088: because we do a 'bulk'insert which takes advantage of MySQLs non-SQL 1089: compliant INSERT command to insert multiple rows at a time. 1090: If anything has gone wrong during this process, $returnstatus is updated with 1091: a description of the error. 1092: 1093: Once the "fulldump" tables are updated, the tables used for chart and 1094: spreadsheet (which hold only the current state of the student on their 1095: homework, not historical data) are updated. If all updates have occured 1096: successfully, the studentdata table is updated to reflect the time of the 1097: update. 1098: 1099: Notice we do not insert the data and immediately query it. This means it 1100: is possible for there to be data returned this first time that is not 1101: available the second time. CYA. 1102: 1103: =cut 1104: 1105: ################################################ 1106: ################################################ 1107: sub update_full_student_data { 1108: my ($sname,$sdom,$courseid) = @_; 1109: # 1110: # Set up database names 1111: &setup_table_names($courseid); 1112: # 1113: my $student_id = &get_student_id($sname,$sdom); 1114: my $student = $sname.':'.$sdom; 1115: # 1116: my $returnstatus = 'okay'; 1117: # 1118: # Download students data 1119: my $time_of_retrieval = time; 1120: my @tmp = &Apache::lonnet::dump($courseid,$sdom,$sname); 1121: if (@tmp && $tmp[0] =~ /^error/) { 1122: $returnstatus = 'error retrieving full student data'; 1123: return $returnstatus; 1124: } elsif (! @tmp) { 1125: $returnstatus = 'okay: no student data'; 1126: return $returnstatus; 1127: } 1128: my %studentdata = @tmp; 1129: # 1130: # Get database handle and clean out the tables 1131: my $dbh = &Apache::lonmysql::get_dbh(); 1132: $dbh->do('DELETE FROM '.$fulldump_response_table.' WHERE student_id='. 1133: $student_id); 1134: $dbh->do('DELETE FROM '.$fulldump_part_table.' WHERE student_id='. 1135: $student_id); 1136: $dbh->do('DELETE FROM '.$fulldump_timestamp_table.' WHERE student_id='. 1137: $student_id); 1138: # 1139: # Parse and store the data into a form we can handle 1140: my $partdata; 1141: my $respdata; 1142: while (my ($key,$value) = each(%studentdata)) { 1143: next if ($key =~ /^(\d+):(resource$|subnum$|keys:)/); 1144: my ($transaction,$symb,$parameter) = split(':',$key); 1145: my $symb_id = &get_symb_id($symb); 1146: if ($parameter eq 'timestamp') { 1147: # We can deal with 'timestamp' right away 1148: my @timestamp_storage = ($symb_id,$student_id, 1149: $transaction,$value); 1150: my $store_command = 'INSERT INTO '.$fulldump_timestamp_table. 1151: " VALUES ('".join("','",@timestamp_storage)."');"; 1152: $dbh->do($store_command); 1153: if ($dbh->err()) { 1154: &Apache::lonnet::logthis('unable to execute '.$store_command); 1155: &Apache::lonnet::logthis($dbh->errstr()); 1156: } 1157: next; 1158: } elsif ($parameter eq 'version') { 1159: next; 1160: } elsif ($parameter =~ /^resource\.(.*)\.(tries|award|awarded|previous|solved|awarddetail|submission)\s*$/){ 1161: # we do not have enough information to store an 1162: # entire row, so we save it up until later. 1163: my ($part_and_resp_id,$field) = ($1,$2); 1164: my ($part,$part_id,$resp,$resp_id); 1165: if ($part_and_resp_id =~ /\./) { 1166: ($part,$resp) = split(/\./,$part_and_resp_id); 1167: $part_id = &get_part_id($part); 1168: $resp_id = &get_part_id($resp); 1169: } else { 1170: $part_id = &get_part_id($part_and_resp_id); 1171: } 1172: if ($field =~ /^(tries|award|awarded|previous)$/) { 1173: $partdata->{$symb_id}->{$part_id}->{$transaction}->{$field}=$value; 1174: } 1175: if (defined($resp_id) && 1176: $field =~ /^(tries|awarddetail|awarded|submission)$/) { 1177: if ($field eq 'submission') { 1178: # We have to be careful with user supplied input. 1179: # most of the time we are okay because it is escaped. 1180: # However, there is one wrinkle: submissions which end in 1181: # and odd number of '\' cause insert errors to occur. 1182: # Best trap this somehow... 1183: my ($offensive_string) = ($value =~ /(\\+)$/); 1184: if (length($offensive_string) % 2) { 1185: $value =~ s/\\$/\\\\/; 1186: } 1187: } 1188: $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{$field}=$value; 1189: } 1190: } 1191: } 1192: ## 1193: ## Store the part data 1194: my $store_command = 'INSERT INTO '.$fulldump_part_table. 1195: ' VALUES '."\n"; 1196: my $store_rows = 0; 1197: while (my ($symb_id,$hash1) = each (%$partdata)) { 1198: while (my ($part_id,$hash2) = each (%$hash1)) { 1199: while (my ($transaction,$data) = each (%$hash2)) { 1200: $store_command .= "('".join("','",$symb_id,$part_id, 1201: $student_id, 1202: $transaction, 1203: $data->{'tries'}, 1204: $data->{'award'}, 1205: $data->{'awarded'}, 1206: $data->{'previous'})."'),"; 1207: $store_rows++; 1208: } 1209: } 1210: } 1211: if ($store_rows) { 1212: chop($store_command); 1213: $dbh->do($store_command); 1214: if ($dbh->err) { 1215: $returnstatus = 'error storing part data'; 1216: &Apache::lonnet::logthis('insert error '.$dbh->errstr()); 1217: &Apache::lonnet::logthis("While attempting\n".$store_command); 1218: } 1219: } 1220: ## 1221: ## Store the response data 1222: $store_command = 'INSERT INTO '.$fulldump_response_table. 1223: ' VALUES '."\n"; 1224: $store_rows = 0; 1225: while (my ($symb_id,$hash1) = each (%$respdata)) { 1226: while (my ($part_id,$hash2) = each (%$hash1)) { 1227: while (my ($resp_id,$hash3) = each (%$hash2)) { 1228: while (my ($transaction,$data) = each (%$hash3)) { 1229: $store_command .= "('".join("','",$symb_id,$part_id, 1230: $resp_id,$student_id, 1231: $transaction, 1232: $data->{'tries'}, 1233: $data->{'awarddetail'}, 1234: $data->{'awarded'}, 1235: '','', 1236: $data->{'submission'})."'),"; 1237: $store_rows++; 1238: } 1239: } 1240: } 1241: } 1242: if ($store_rows) { 1243: chop($store_command); 1244: $dbh->do($store_command); 1245: if ($dbh->err) { 1246: $returnstatus = 'error storing response data'; 1247: &Apache::lonnet::logthis('insert error '.$dbh->errstr()); 1248: &Apache::lonnet::logthis("While attempting\n".$store_command); 1249: } 1250: } 1251: ## 1252: ## Update the students "current" data in the performance 1253: ## and parameters tables. 1254: my ($status,undef) = &store_student_data 1255: ($sname,$sdom,$courseid, 1256: &Apache::lonnet::convert_dump_to_currentdump(\%studentdata)); 1257: if ($returnstatus eq 'okay' && $status ne 'okay') { 1258: $returnstatus = 'error storing current data:'.$status; 1259: } elsif ($status ne 'okay') { 1260: $returnstatus .= ' error storing current data:'.$status; 1261: } 1262: ## 1263: ## Update the students time...... 1264: if ($returnstatus eq 'okay') { 1265: &Apache::lonmysql::replace_row 1266: ($studentdata_table, 1267: [$student_id,$time_of_retrieval,$time_of_retrieval,undef,undef]); 1268: } 1269: return $returnstatus; 1270: } 1271: 1272: ################################################ 1273: ################################################ 1274: 1275: =pod 1276: 1277: =item &update_student_data() 1278: 1279: Input: $sname, $sdom, $courseid 1280: 1281: Output: $returnstatus, \%student_data 1282: 1283: $returnstatus is a string describing any errors that occured. 'okay' is the 1284: default. 1285: \%student_data is the data returned by a call to lonnet::currentdump. 1286: 1287: This subroutine loads a students data using lonnet::currentdump and inserts 1288: it into the MySQL database. The inserts are done on two tables, 1289: $performance_table and $parameters_table. $parameters_table holds the data 1290: that is not included in $performance_table. See the description of 1291: $performance_table elsewhere in this file. The INSERT calls are made 1292: directly by this subroutine, not through lonmysql because we do a 'bulk' 1293: insert which takes advantage of MySQLs non-SQL compliant INSERT command to 1294: insert multiple rows at a time. If anything has gone wrong during this 1295: process, $returnstatus is updated with a description of the error and 1296: \%student_data is returned. 1297: 1298: Notice we do not insert the data and immediately query it. This means it 1299: is possible for there to be data returned this first time that is not 1300: available the second time. CYA. 1301: 1302: =cut 1303: 1304: ################################################ 1305: ################################################ 1306: sub update_student_data { 1307: my ($sname,$sdom,$courseid) = @_; 1308: # 1309: # Set up database names 1310: &setup_table_names($courseid); 1311: # 1312: my $student_id = &get_student_id($sname,$sdom); 1313: my $student = $sname.':'.$sdom; 1314: # 1315: my $returnstatus = 'okay'; 1316: # 1317: # Download students data 1318: my $time_of_retrieval = time; 1319: my @tmp = &Apache::lonnet::currentdump($courseid,$sdom,$sname); 1320: if ((scalar(@tmp) > 0) && ($tmp[0] =~ /^error:/)) { 1321: &Apache::lonnet::logthis('error getting data for '. 1322: $sname.':'.$sdom.' in course '.$courseid. 1323: ':'.$tmp[0]); 1324: $returnstatus = 'error getting data'; 1325: return ($returnstatus,undef); 1326: } 1327: if (scalar(@tmp) < 1) { 1328: return ('no data',undef); 1329: } 1330: my %student_data = @tmp; 1331: my @Results = &store_student_data($sname,$sdom,$courseid,\%student_data); 1332: # 1333: # Set the students update time 1334: &Apache::lonmysql::replace_row($studentdata_table, 1335: [$student_id,$time_of_retrieval,undef,undef,undef]); 1336: # 1337: return @Results; 1338: } 1339: 1340: sub store_student_data { 1341: my ($sname,$sdom,$courseid,$student_data) = @_; 1342: # 1343: my $student_id = &get_student_id($sname,$sdom); 1344: my $student = $sname.':'.$sdom; 1345: # 1346: my $returnstatus = 'okay'; 1347: # 1348: # Remove all of the students data from the table 1349: my $dbh = &Apache::lonmysql::get_dbh(); 1350: $dbh->do('DELETE FROM '.$performance_table.' WHERE student_id='. 1351: $student_id); 1352: $dbh->do('DELETE FROM '.$parameters_table.' WHERE student_id='. 1353: $student_id); 1354: # 1355: # Store away the data 1356: # 1357: my $starttime = Time::HiRes::time; 1358: my $elapsed = 0; 1359: my $rows_stored; 1360: my $store_parameters_command = 'INSERT INTO '.$parameters_table. 1361: ' VALUES '."\n"; 1362: my $num_parameters = 0; 1363: my $store_performance_command = 'INSERT INTO '.$performance_table. 1364: ' VALUES '."\n"; 1365: return ('error',undef) if (! defined($dbh)); 1366: while (my ($current_symb,$param_hash) = each(%{$student_data})) { 1367: # 1368: # make sure the symb is set up properly 1369: my $symb_id = &get_symb_id($current_symb); 1370: # 1371: # Load data into the tables 1372: while (my ($parameter,$value) = each(%$param_hash)) { 1373: my $newstring; 1374: if ($parameter !~ /(timestamp|resource\.(.*)\.(solved|tries|awarded|award|awarddetail|previous))/) { 1375: $newstring = "('".join("','", 1376: $symb_id,$student_id, 1377: $parameter)."',". 1378: $dbh->quote($value)."),\n"; 1379: $num_parameters ++; 1380: if ($newstring !~ /''/) { 1381: $store_parameters_command .= $newstring; 1382: $rows_stored++; 1383: } 1384: } 1385: next if ($parameter !~ /^resource\.(.*)\.solved$/); 1386: # 1387: my $part = $1; 1388: my $part_id = &get_part_id($part); 1389: next if (!defined($part_id)); 1390: my $solved = $value; 1391: my $tries = $param_hash->{'resource.'.$part.'.tries'}; 1392: my $awarded = $param_hash->{'resource.'.$part.'.awarded'}; 1393: my $award = $param_hash->{'resource.'.$part.'.award'}; 1394: my $awarddetail = $param_hash->{'resource.'.$part.'.awarddetail'}; 1395: my $timestamp = $param_hash->{'timestamp'}; 1396: # 1397: $solved = '' if (! defined($solved)); 1398: $tries = '' if (! defined($tries)); 1399: $awarded = '' if (! defined($awarded)); 1400: $award = '' if (! defined($award)); 1401: $awarddetail = '' if (! defined($awarddetail)); 1402: $newstring = "('".join("','",$symb_id,$student_id,$part_id,$part, 1403: $solved,$tries,$awarded,$award, 1404: $awarddetail,$timestamp)."'),\n"; 1405: $store_performance_command .= $newstring; 1406: $rows_stored++; 1407: } 1408: } 1409: chop $store_parameters_command; 1410: chop $store_parameters_command; 1411: chop $store_performance_command; 1412: chop $store_performance_command; 1413: my $start = Time::HiRes::time; 1414: $dbh->do($store_parameters_command) if ($num_parameters>0); 1415: if ($dbh->err()) { 1416: &Apache::lonnet::logthis(' bigass insert error:'.$dbh->errstr()); 1417: &Apache::lonnet::logthis('command = '.$store_parameters_command); 1418: &Apache::lonnet::logthis('rows_stored = '.$rows_stored); 1419: &Apache::lonnet::logthis('student_id = '.$student_id); 1420: $returnstatus = 'error: unable to insert parameters into database'; 1421: return ($returnstatus,$student_data); 1422: } 1423: $dbh->do($store_performance_command); 1424: if ($dbh->err()) { 1425: &Apache::lonnet::logthis(' bigass insert error:'.$dbh->errstr()); 1426: &Apache::lonnet::logthis('command = '.$store_performance_command); 1427: $returnstatus = 'error: unable to insert performance into database'; 1428: return ($returnstatus,$student_data); 1429: } 1430: $elapsed += Time::HiRes::time - $start; 1431: return ($returnstatus,$student_data); 1432: } 1433: 1434: ###################################### 1435: ###################################### 1436: 1437: =pod 1438: 1439: =item &ensure_tables_are_set_up($courseid) 1440: 1441: Checks to be sure the MySQL tables for the given class are set up. 1442: If $courseid is omitted it will be obtained from the environment. 1443: 1444: Returns nothing on success and 'error' on failure 1445: 1446: =cut 1447: 1448: ###################################### 1449: ###################################### 1450: sub ensure_tables_are_set_up { 1451: my ($courseid) = @_; 1452: $courseid = $ENV{'request.course.id'} if (! defined($courseid)); 1453: # 1454: # Clean out package variables 1455: &setup_table_names($courseid); 1456: # 1457: # if the tables do not exist, make them 1458: my @CurrentTable = &Apache::lonmysql::tables_in_db(); 1459: my ($found_symb,$found_student,$found_part,$found_studentdata, 1460: $found_performance,$found_parameters,$found_fulldump_part, 1461: $found_fulldump_response,$found_fulldump_timestamp); 1462: foreach (@CurrentTable) { 1463: $found_symb = 1 if ($_ eq $symb_table); 1464: $found_student = 1 if ($_ eq $student_table); 1465: $found_part = 1 if ($_ eq $part_table); 1466: $found_studentdata = 1 if ($_ eq $studentdata_table); 1467: $found_performance = 1 if ($_ eq $performance_table); 1468: $found_parameters = 1 if ($_ eq $parameters_table); 1469: $found_fulldump_part = 1 if ($_ eq $fulldump_part_table); 1470: $found_fulldump_response = 1 if ($_ eq $fulldump_response_table); 1471: $found_fulldump_timestamp = 1 if ($_ eq $fulldump_timestamp_table); 1472: } 1473: if (!$found_symb || !$found_studentdata || 1474: !$found_student || !$found_part || 1475: !$found_performance || !$found_parameters || 1476: !$found_fulldump_part || !$found_fulldump_response || 1477: !$found_fulldump_timestamp ) { 1478: if (&init_dbs($courseid)) { 1479: return 'error'; 1480: } 1481: } 1482: } 1483: 1484: ################################################ 1485: ################################################ 1486: 1487: =pod 1488: 1489: =item &ensure_current_data() 1490: 1491: Input: $sname, $sdom, $courseid 1492: 1493: Output: $status, $data 1494: 1495: This routine ensures the data for a given student is up to date. 1496: The $studentdata_table is queried to determine the time of the last update. 1497: If the students data is out of date, &update_student_data() is called. 1498: The return values from the call to &update_student_data() are returned. 1499: 1500: =cut 1501: 1502: ################################################ 1503: ################################################ 1504: sub ensure_current_data { 1505: my ($sname,$sdom,$courseid) = @_; 1506: my $status = 'okay'; # return value 1507: # 1508: $courseid = $ENV{'request.course.id'} if (! defined($courseid)); 1509: &ensure_tables_are_set_up($courseid); 1510: # 1511: # Get the update time for the user 1512: my $updatetime = 0; 1513: my $modifiedtime = &Apache::lonnet::GetFileTimestamp 1514: ($sdom,$sname,$courseid.'.db', 1515: $Apache::lonnet::perlvar{'lonUsersDir'}); 1516: # 1517: my $student_id = &get_student_id($sname,$sdom); 1518: my @Result = &Apache::lonmysql::get_rows($studentdata_table, 1519: "student_id ='$student_id'"); 1520: my $data = undef; 1521: if (@Result) { 1522: $updatetime = $Result[0]->[1]; 1523: } 1524: if ($modifiedtime > $updatetime) { 1525: ($status,$data) = &update_student_data($sname,$sdom,$courseid); 1526: } 1527: return ($status,$data); 1528: } 1529: 1530: ################################################ 1531: ################################################ 1532: 1533: =pod 1534: 1535: =item &ensure_current_full_data($sname,$sdom,$courseid) 1536: 1537: Input: $sname, $sdom, $courseid 1538: 1539: Output: $status 1540: 1541: This routine ensures the fulldata (the data from a lonnet::dump, not a 1542: lonnet::currentdump) for a given student is up to date. 1543: The $studentdata_table is queried to determine the time of the last update. 1544: If the students fulldata is out of date, &update_full_student_data() is 1545: called. 1546: 1547: The return value from the call to &update_full_student_data() is returned. 1548: 1549: =cut 1550: 1551: ################################################ 1552: ################################################ 1553: sub ensure_current_full_data { 1554: my ($sname,$sdom,$courseid) = @_; 1555: my $status = 'okay'; # return value 1556: # 1557: $courseid = $ENV{'request.course.id'} if (! defined($courseid)); 1558: &ensure_tables_are_set_up($courseid); 1559: # 1560: # Get the update time for the user 1561: my $modifiedtime = &Apache::lonnet::GetFileTimestamp 1562: ($sdom,$sname,$courseid.'.db', 1563: $Apache::lonnet::perlvar{'lonUsersDir'}); 1564: # 1565: my $student_id = &get_student_id($sname,$sdom); 1566: my @Result = &Apache::lonmysql::get_rows($studentdata_table, 1567: "student_id ='$student_id'"); 1568: my $updatetime; 1569: if (@Result && ref($Result[0]) eq 'ARRAY') { 1570: $updatetime = $Result[0]->[2]; 1571: } 1572: if (! defined($updatetime) || $modifiedtime > $updatetime) { 1573: $status = &update_full_student_data($sname,$sdom,$courseid); 1574: } 1575: return $status; 1576: } 1577: 1578: ################################################ 1579: ################################################ 1580: 1581: =pod 1582: 1583: =item &get_student_data_from_performance_cache() 1584: 1585: Input: $sname, $sdom, $symb, $courseid 1586: 1587: Output: hash reference containing the data for the given student. 1588: If $symb is undef, all the students data is returned. 1589: 1590: This routine is the heart of the local caching system. See the description 1591: of $performance_table, $symb_table, $student_table, and $part_table. The 1592: main task is building the MySQL request. The tables appear in the request 1593: in the order in which they should be parsed by MySQL. When searching 1594: on a student the $student_table is used to locate the 'student_id'. All 1595: rows in $performance_table which have a matching 'student_id' are returned, 1596: with data from $part_table and $symb_table which match the entries in 1597: $performance_table, 'part_id' and 'symb_id'. When searching on a symb, 1598: the $symb_table is processed first, with matching rows grabbed from 1599: $performance_table and filled in from $part_table and $student_table in 1600: that order. 1601: 1602: Running 'EXPLAIN ' on the 'SELECT' statements generated can be quite 1603: interesting, especially if you play with the order the tables are listed. 1604: 1605: =cut 1606: 1607: ################################################ 1608: ################################################ 1609: sub get_student_data_from_performance_cache { 1610: my ($sname,$sdom,$symb,$courseid)=@_; 1611: my $student = $sname.':'.$sdom if (defined($sname) && defined($sdom)); 1612: &setup_table_names($courseid); 1613: # 1614: # Return hash 1615: my $studentdata; 1616: # 1617: my $dbh = &Apache::lonmysql::get_dbh(); 1618: my $request = "SELECT ". 1619: "d.symb,a.part,a.solved,a.tries,a.awarded,a.award,a.awarddetail,". 1620: "a.timestamp "; 1621: if (defined($student)) { 1622: $request .= "FROM $student_table AS b ". 1623: "LEFT JOIN $performance_table AS a ON b.student_id=a.student_id ". 1624: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ". 1625: "LEFT JOIN $symb_table AS d ON d.symb_id = a.symb_id ". 1626: "WHERE student='$student'"; 1627: if (defined($symb) && $symb ne '') { 1628: $request .= " AND d.symb=".$dbh->quote($symb); 1629: } 1630: } elsif (defined($symb) && $symb ne '') { 1631: $request .= "FROM $symb_table as d ". 1632: "LEFT JOIN $performance_table AS a ON d.symb_id=a.symb_id ". 1633: # "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ". 1634: "LEFT JOIN $student_table AS b ON b.student_id = a.student_id ". 1635: "WHERE symb='".$dbh->quote($symb)."'"; 1636: } 1637: my $starttime = Time::HiRes::time; 1638: my $rows_retrieved = 0; 1639: my $sth = $dbh->prepare($request); 1640: $sth->execute(); 1641: if ($sth->err()) { 1642: &Apache::lonnet::logthis("Unable to execute MySQL request:"); 1643: &Apache::lonnet::logthis("\n".$request."\n"); 1644: &Apache::lonnet::logthis("error is:".$sth->errstr()); 1645: return undef; 1646: } 1647: foreach my $row (@{$sth->fetchall_arrayref}) { 1648: $rows_retrieved++; 1649: my ($symb,$part,$solved,$tries,$awarded,$award,$awarddetail,$time) = 1650: (@$row); 1651: my $base = 'resource.'.$part; 1652: $studentdata->{$symb}->{$base.'.solved'} = $solved; 1653: $studentdata->{$symb}->{$base.'.tries'} = $tries; 1654: $studentdata->{$symb}->{$base.'.awarded'} = $awarded; 1655: $studentdata->{$symb}->{$base.'.award'} = $award; 1656: $studentdata->{$symb}->{$base.'.awarddetail'} = $awarddetail; 1657: $studentdata->{$symb}->{'timestamp'} = $time if (defined($time) && $time ne ''); 1658: } 1659: if (defined($symb) && $symb ne '') { 1660: $studentdata = $studentdata->{$symb}; 1661: } 1662: return $studentdata; 1663: } 1664: 1665: ################################################ 1666: ################################################ 1667: 1668: =pod 1669: 1670: =item &get_current_state() 1671: 1672: Input: $sname,$sdom,$symb,$courseid 1673: 1674: Output: Described below 1675: 1676: Retrieve the current status of a students performance. $sname and 1677: $sdom are the only required parameters. If $symb is undef the results 1678: of an &Apache::lonnet::currentdump() will be returned. 1679: If $courseid is undef it will be retrieved from the environment. 1680: 1681: The return structure is based on &Apache::lonnet::currentdump. If 1682: $symb is unspecified, all the students data is returned in a hash of 1683: the form: 1684: ( 1685: symb1 => { param1 => value1, param2 => value2 ... }, 1686: symb2 => { param1 => value1, param2 => value2 ... }, 1687: ) 1688: 1689: If $symb is specified, a hash of 1690: ( 1691: param1 => value1, 1692: param2 => value2, 1693: ) 1694: is returned. 1695: 1696: If no data is found for $symb, or if the student has no performance data, 1697: an empty list is returned. 1698: 1699: =cut 1700: 1701: ################################################ 1702: ################################################ 1703: sub get_current_state { 1704: my ($sname,$sdom,$symb,$courseid,$forcedownload)=@_; 1705: # 1706: $courseid = $ENV{'request.course.id'} if (! defined($courseid)); 1707: # 1708: return () if (! defined($sname) || ! defined($sdom)); 1709: # 1710: my ($status,$data) = &ensure_current_data($sname,$sdom,$courseid); 1711: # &Apache::lonnet::logthis 1712: # ('sname = '.$sname. 1713: # ' domain = '.$sdom. 1714: # ' status = '.$status. 1715: # ' data is '.(defined($data)?'defined':'undefined')); 1716: # while (my ($symb,$hash) = each(%$data)) { 1717: # &Apache::lonnet::logthis($symb."\n----------------------------------"); 1718: # while (my ($key,$value) = each (%$hash)) { 1719: # &Apache::lonnet::logthis(" ".$key." = ".$value); 1720: # } 1721: # } 1722: # 1723: if (defined($data) && defined($symb) && ref($data->{$symb})) { 1724: return %{$data->{$symb}}; 1725: } elsif (defined($data) && ! defined($symb) && ref($data)) { 1726: return %$data; 1727: } 1728: if ($status eq 'no data') { 1729: return (); 1730: } else { 1731: if ($status ne 'okay' && $status ne '') { 1732: &Apache::lonnet::logthis('status = '.$status); 1733: return (); 1734: } 1735: my $returnhash = &get_student_data_from_performance_cache($sname,$sdom, 1736: $symb,$courseid); 1737: return %$returnhash if (defined($returnhash)); 1738: } 1739: return (); 1740: } 1741: 1742: ################################################ 1743: ################################################ 1744: 1745: =pod 1746: 1747: =item &get_problem_statistics() 1748: 1749: Gather data on a given problem. The database is assumed to be 1750: populated and all local caching variables are assumed to be set 1751: properly. This means you need to call &ensure_current_data for 1752: the students you are concerned with prior to calling this routine. 1753: 1754: Inputs: $students, $symb, $part, $courseid 1755: 1756: =over 4 1757: 1758: =item $students is an array of hash references. 1759: Each hash must contain at least the 'username' and 'domain' of a student. 1760: 1761: =item $symb is the symb for the problem. 1762: 1763: =item $part is the part id you need statistics for 1764: 1765: =item $courseid is the course id, of course! 1766: 1767: =back 1768: 1769: Outputs: See the code for up to date information. A hash reference is 1770: returned. The hash has the following keys defined: 1771: 1772: =over 4 1773: 1774: =item num_students The number of students attempting the problem 1775: 1776: =item tries The total number of tries for the students 1777: 1778: =item max_tries The maximum number of tries taken 1779: 1780: =item mean_tries The average number of tries 1781: 1782: =item num_solved The number of students able to solve the problem 1783: 1784: =item num_override The number of students whose answer is 'correct_by_override' 1785: 1786: =item deg_of_diff The degree of difficulty of the problem 1787: 1788: =item std_tries The standard deviation of the number of tries 1789: 1790: =item skew_tries The skew of the number of tries 1791: 1792: =item per_wrong The number of students attempting the problem who were not 1793: able to answer it correctly. 1794: 1795: =back 1796: 1797: =cut 1798: 1799: ################################################ 1800: ################################################ 1801: sub get_problem_statistics { 1802: my ($students,$symb,$part,$courseid) = @_; 1803: return if (! defined($symb) || ! defined($part)); 1804: $courseid = $ENV{'request.course.id'} if (! defined($courseid)); 1805: # 1806: my $symb_id = &get_symb_id($symb); 1807: my $part_id = &get_part_id($part); 1808: my $stats_table = $courseid.'_problem_stats'; 1809: # 1810: my $dbh = &Apache::lonmysql::get_dbh(); 1811: return undef if (! defined($dbh)); 1812: # 1813: # A) Number of Students attempting problem 1814: # B) Total number of tries of students attempting problem 1815: # C) Mod (largest number of tries for solving the problem) 1816: # D) Mean (average number of tries for solving the problem) 1817: # E) Number of students to solve the problem 1818: # F) Number of students to solve the problem by override 1819: # G) Number of students unable to solve the problem 1820: # H) Degree of difficulty : 1-(E+F)/B 1821: # I) Standard deviation of number of tries 1822: # J) Skew of tries: sqrt(sum(Xi-D)^3)/A 1823: # 1824: $dbh->do('DROP TABLE '.$stats_table); # May return an error 1825: my $request = 1826: 'CREATE TEMPORARY TABLE '.$stats_table. 1827: ' SELECT student_id,solved,award,tries FROM '.$performance_table. 1828: ' WHERE symb_id='.$symb_id.' AND part_id='.$part_id; 1829: if (defined($students)) { 1830: $request .= ' AND ('. 1831: join(' OR ', map {'student_id='. 1832: &get_student_id($_->{'username'}, 1833: $_->{'domain'}) 1834: } @$students 1835: ).')'; 1836: } 1837: # &Apache::lonnet::logthis($request); 1838: $dbh->do($request); 1839: my ($num,$tries,$mod,$mean,$STD) = &execute_SQL_request 1840: ($dbh, 1841: 'SELECT COUNT(*),SUM(tries),MAX(tries),AVG(tries),STD(tries) FROM '. 1842: $stats_table); 1843: my ($Solved) = &execute_SQL_request($dbh,'SELECT COUNT(tries) FROM '. 1844: $stats_table. 1845: " WHERE solved='correct_by_student'"); 1846: my ($solved) = &execute_SQL_request($dbh,'SELECT COUNT(tries) FROM '. 1847: $stats_table. 1848: " WHERE solved='correct_by_override'"); 1849: $num = 0 if (! defined($num)); 1850: $tries = 0 if (! defined($tries)); 1851: $mod = 0 if (! defined($mod)); 1852: $STD = 0 if (! defined($STD)); 1853: $Solved = 0 if (! defined($Solved)); 1854: $solved = 0 if (! defined($solved)); 1855: # 1856: my $DegOfDiff = 'nan'; 1857: $DegOfDiff = 1-($Solved)/$tries if ($tries>0); 1858: 1859: my $SKEW = 'nan'; 1860: my $wrongpercent = 0; 1861: if ($num > 0) { 1862: ($SKEW) = &execute_SQL_request($dbh,'SELECT SQRT(SUM('. 1863: 'POWER(tries - '.$STD.',3)'. 1864: '))/'.$num.' FROM '.$stats_table); 1865: $wrongpercent=int(10*100*($num-$Solved+$solved)/$num)/10; 1866: } 1867: # 1868: $dbh->do('DROP TABLE '.$stats_table); # May return an error 1869: # 1870: # Store in metadata 1871: # 1872: if ($num) { 1873: my %storestats=(); 1874: 1875: my $urlres=(&Apache::lonnet::decode_symb($symb))[2]; 1876: 1877: $storestats{$courseid.'___'.$urlres.'___timestamp'}=time; 1878: $storestats{$courseid.'___'.$urlres.'___stdno'}=$num; 1879: $storestats{$courseid.'___'.$urlres.'___avetries'}=$mean; 1880: $storestats{$courseid.'___'.$urlres.'___difficulty'}=$DegOfDiff; 1881: 1882: $urlres=~/^(\w+)\/(\w+)/; 1883: &Apache::lonnet::put('nohist_resevaldata',\%storestats,$1,$2); 1884: } 1885: # 1886: # Return result 1887: # 1888: return { num_students => $num, 1889: tries => $tries, 1890: max_tries => $mod, 1891: mean_tries => $mean, 1892: std_tries => $STD, 1893: skew_tries => $SKEW, 1894: num_solved => $Solved, 1895: num_override => $solved, 1896: per_wrong => $wrongpercent, 1897: deg_of_diff => $DegOfDiff }; 1898: } 1899: 1900: sub execute_SQL_request { 1901: my ($dbh,$request)=@_; 1902: # &Apache::lonnet::logthis($request); 1903: my $sth = $dbh->prepare($request); 1904: $sth->execute(); 1905: my $row = $sth->fetchrow_arrayref(); 1906: if (ref($row) eq 'ARRAY' && scalar(@$row)>0) { 1907: return @$row; 1908: } 1909: return (); 1910: } 1911: 1912: 1913: ################################################ 1914: ################################################ 1915: 1916: =pod 1917: 1918: =item &setup_table_names() 1919: 1920: input: course id 1921: 1922: output: none 1923: 1924: Cleans up the package variables for local caching. 1925: 1926: =cut 1927: 1928: ################################################ 1929: ################################################ 1930: sub setup_table_names { 1931: my ($courseid) = @_; 1932: if (! defined($courseid)) { 1933: $courseid = $ENV{'request.course.id'}; 1934: } 1935: # 1936: if (! defined($current_course) || $current_course ne $courseid) { 1937: # Clear out variables 1938: $have_read_part_table = 0; 1939: undef(%ids_by_part); 1940: undef(%parts_by_id); 1941: $have_read_symb_table = 0; 1942: undef(%ids_by_symb); 1943: undef(%symbs_by_id); 1944: $have_read_student_table = 0; 1945: undef(%ids_by_student); 1946: undef(%students_by_id); 1947: # 1948: $current_course = $courseid; 1949: } 1950: # 1951: # Set up database names 1952: my $base_id = $courseid; 1953: $symb_table = $base_id.'_'.'symb'; 1954: $part_table = $base_id.'_'.'part'; 1955: $student_table = $base_id.'_'.'student'; 1956: $studentdata_table = $base_id.'_'.'studentdata'; 1957: $performance_table = $base_id.'_'.'performance'; 1958: $parameters_table = $base_id.'_'.'parameters'; 1959: $fulldump_part_table = $base_id.'_'.'partdata'; 1960: $fulldump_response_table = $base_id.'_'.'responsedata'; 1961: $fulldump_timestamp_table = $base_id.'_'.'timestampdata'; 1962: # 1963: @Tables = ( 1964: $symb_table, 1965: $part_table, 1966: $student_table, 1967: $studentdata_table, 1968: $performance_table, 1969: $parameters_table, 1970: $fulldump_part_table, 1971: $fulldump_response_table, 1972: $fulldump_timestamp_table, 1973: ); 1974: return; 1975: } 1976: 1977: ################################################ 1978: ################################################ 1979: 1980: =pod 1981: 1982: =back 1983: 1984: =item End of Local Data Caching Subroutines 1985: 1986: =cut 1987: 1988: ################################################ 1989: ################################################ 1990: 1991: } # End scope of table identifiers 1992: 1993: ################################################ 1994: ################################################ 1995: 1996: =pod 1997: 1998: =head3 Classlist Subroutines 1999: 2000: =item &get_classlist(); 2001: 2002: Retrieve the classist of a given class or of the current class. Student 2003: information is returned from the classlist.db file and, if needed, 2004: from the students environment. 2005: 2006: Optional arguments are $cid, $cdom, and $cnum (course id, course domain, 2007: and course number, respectively). Any omitted arguments will be taken 2008: from the current environment ($ENV{'request.course.id'}, 2009: $ENV{'course.'.$cid.'.domain'}, and $ENV{'course.'.$cid.'.num'}). 2010: 2011: Returns a reference to a hash which contains: 2012: keys '$sname:$sdom' 2013: values [$sdom,$sname,$end,$start,$id,$section,$fullname,$status] 2014: 2015: The constant values CL_SDOM, CL_SNAME, CL_END, etc. can be used 2016: as indices into the returned list to future-proof clients against 2017: changes in the list order. 2018: 2019: =cut 2020: 2021: ################################################ 2022: ################################################ 2023: 2024: sub CL_SDOM { return 0; } 2025: sub CL_SNAME { return 1; } 2026: sub CL_END { return 2; } 2027: sub CL_START { return 3; } 2028: sub CL_ID { return 4; } 2029: sub CL_SECTION { return 5; } 2030: sub CL_FULLNAME { return 6; } 2031: sub CL_STATUS { return 7; } 2032: 2033: sub get_classlist { 2034: my ($cid,$cdom,$cnum) = @_; 2035: $cid = $cid || $ENV{'request.course.id'}; 2036: $cdom = $cdom || $ENV{'course.'.$cid.'.domain'}; 2037: $cnum = $cnum || $ENV{'course.'.$cid.'.num'}; 2038: my $now = time; 2039: # 2040: my %classlist=&Apache::lonnet::dump('classlist',$cdom,$cnum); 2041: while (my ($student,$info) = each(%classlist)) { 2042: if ($student =~ /^(con_lost|error|no_such_host)/i) { 2043: &Apache::lonnet::logthis('get_classlist error for '.$cid.':'.$student); 2044: return undef; 2045: } 2046: my ($sname,$sdom) = split(/:/,$student); 2047: my @Values = split(/:/,$info); 2048: my ($end,$start,$id,$section,$fullname); 2049: if (@Values > 2) { 2050: ($end,$start,$id,$section,$fullname) = @Values; 2051: } else { # We have to get the data ourselves 2052: ($end,$start) = @Values; 2053: $section = &Apache::lonnet::getsection($sdom,$sname,$cid); 2054: my %info=&Apache::lonnet::get('environment', 2055: ['firstname','middlename', 2056: 'lastname','generation','id'], 2057: $sdom, $sname); 2058: my ($tmp) = keys(%info); 2059: if ($tmp =~/^(con_lost|error|no_such_host)/i) { 2060: $fullname = 'not available'; 2061: $id = 'not available'; 2062: &Apache::lonnet::logthis('unable to retrieve environment '. 2063: 'for '.$sname.':'.$sdom); 2064: } else { 2065: $fullname = &ProcessFullName(@info{qw/lastname generation 2066: firstname middlename/}); 2067: $id = $info{'id'}; 2068: } 2069: # Update the classlist with this students information 2070: if ($fullname ne 'not available') { 2071: my $enrolldata = join(':',$end,$start,$id,$section,$fullname); 2072: my $reply=&Apache::lonnet::cput('classlist', 2073: {$student => $enrolldata}, 2074: $cdom,$cnum); 2075: if ($reply !~ /^(ok|delayed)/) { 2076: &Apache::lonnet::logthis('Unable to update classlist for '. 2077: 'student '.$sname.':'.$sdom. 2078: ' error:'.$reply); 2079: } 2080: } 2081: } 2082: my $status='Expired'; 2083: if(((!$end) || $now < $end) && ((!$start) || ($now > $start))) { 2084: $status='Active'; 2085: } 2086: $classlist{$student} = 2087: [$sdom,$sname,$end,$start,$id,$section,$fullname,$status]; 2088: } 2089: if (wantarray()) { 2090: return (\%classlist,['domain','username','end','start','id', 2091: 'section','fullname','status']); 2092: } else { 2093: return \%classlist; 2094: } 2095: } 2096: 2097: # ----- END HELPER FUNCTIONS -------------------------------------------- 2098: 2099: 1; 2100: __END__ 2101: 2102: