aboutsummaryrefslogtreecommitdiffstats
path: root/Bugzilla/Chart.pm
blob: 0a655769fbb5e6ce5e9a998752316f49088e72a5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
#
# This Source Code Form is "Incompatible With Secondary Licenses", as
# defined by the Mozilla Public License, v. 2.0.

use strict;

# This module represents a chart.
#
# Note that it is perfectly legal for the 'lines' member variable of this
# class (which is an array of Bugzilla::Series objects) to have empty members
# in it. If this is true, the 'labels' array will also have empty members at
# the same points.
package Bugzilla::Chart;

use Bugzilla::Error;
use Bugzilla::Util;
use Bugzilla::Series;

use Date::Format;
use Date::Parse;
use List::Util qw(max);

sub new {
    my $invocant = shift;
    my $class = ref($invocant) || $invocant;
  
    # Create a ref to an empty hash and bless it
    my $self = {};
    bless($self, $class);

    if ($#_ == 0) {
        # Construct from a CGI object.
        $self->init($_[0]);
    } 
    else {
        die("CGI object not passed in - invalid number of args \($#_\)($_)");
    }

    return $self;
}

sub init {
    my $self = shift;
    my $cgi = shift;

    # The data structure is a list of lists (lines) of Series objects. 
    # There is a separate list for the labels.
    #
    # The URL encoding is:
    # line0=67&line0=73&line1=81&line2=67...
    # &label0=B+/+R+/+CONFIRMED&label1=...
    # &select0=1&select3=1...    
    # &cumulate=1&datefrom=2002-02-03&dateto=2002-04-04&ctype=html...
    # &gt=1&labelgt=Grand+Total    
    foreach my $param ($cgi->param()) {
        # Store all the lines
        if ($param =~ /^line(\d+)$/) {
            foreach my $series_id ($cgi->param($param)) {
                detaint_natural($series_id) 
                                     || ThrowCodeError("invalid_series_id");
                my $series = new Bugzilla::Series($series_id);
                push(@{$self->{'lines'}[$1]}, $series) if $series;
            }
        }

        # Store all the labels
        if ($param =~ /^label(\d+)$/) {
            $self->{'labels'}[$1] = $cgi->param($param);
        }        
    }
    
    # Store the miscellaneous metadata
    $self->{'cumulate'} = $cgi->param('cumulate') ? 1 : 0;
    $self->{'gt'}       = $cgi->param('gt') ? 1 : 0;
    $self->{'labelgt'}  = $cgi->param('labelgt');
    $self->{'datefrom'} = $cgi->param('datefrom');
    $self->{'dateto'}   = $cgi->param('dateto');
    
    # If we are cumulating, a grand total makes no sense
    $self->{'gt'} = 0 if $self->{'cumulate'};
    
    # Make sure the dates are ones we are able to interpret
    foreach my $date ('datefrom', 'dateto') {
        if ($self->{$date}) {
            $self->{$date} = str2time($self->{$date}) 
              || ThrowUserError("illegal_date", { date => $self->{$date}});
        }
    }

    # datefrom can't be after dateto
    if ($self->{'datefrom'} && $self->{'dateto'} && 
        $self->{'datefrom'} > $self->{'dateto'}) 
    {
          ThrowUserError("misarranged_dates", 
                                         {'datefrom' => $cgi->param('datefrom'),
                                          'dateto' => $cgi->param('dateto')});
    }    
}

# Alter Chart so that the selected series are added to it.
sub add {
    my $self = shift;
    my @series_ids = @_;

    # Get the current size of the series; required for adding Grand Total later
    my $current_size = scalar($self->getSeriesIDs());
    
    # Count the number of added series
    my $added = 0;
    # Create new Series and push them on to the list of lines.
    # Note that new lines have no label; the display template is responsible
    # for inventing something sensible.
    foreach my $series_id (@series_ids) {
        my $series = new Bugzilla::Series($series_id);
        if ($series) {
            push(@{$self->{'lines'}}, [$series]);
            push(@{$self->{'labels'}}, "");
            $added++;
        }
    }
    
    # If we are going from < 2 to >= 2 series, add the Grand Total line.
    if (!$self->{'gt'}) {
        if ($current_size < 2 &&
            $current_size + $added >= 2) 
        {
            $self->{'gt'} = 1;
        }
    }
}

# Alter Chart so that the selections are removed from it.
sub remove {
    my $self = shift;
    my @line_ids = @_;
    
    foreach my $line_id (@line_ids) {
        if ($line_id == 65536) {
            # Magic value - delete Grand Total.
            $self->{'gt'} = 0;
        } 
        else {
            delete($self->{'lines'}->[$line_id]);
            delete($self->{'labels'}->[$line_id]);
        }
    }
}

# Alter Chart so that the selections are summed.
sub sum {
    my $self = shift;
    my @line_ids = @_;
    
    # We can't add the Grand Total to things.
    @line_ids = grep(!/^65536$/, @line_ids);
        
    # We can't add less than two things.
    return if scalar(@line_ids) < 2;
    
    my @series;
    my $label = "";
    my $biggestlength = 0;
    
    # We rescue the Series objects of all the series involved in the sum.
    foreach my $line_id (@line_ids) {
        my @line = @{$self->{'lines'}->[$line_id]};
        
        foreach my $series (@line) {
            push(@series, $series);
        }
        
        # We keep the label that labels the line with the most series.
        if (scalar(@line) > $biggestlength) {
            $biggestlength = scalar(@line);
            $label = $self->{'labels'}->[$line_id];
        }
    }

    $self->remove(@line_ids);

    push(@{$self->{'lines'}}, \@series);
    push(@{$self->{'labels'}}, $label);
}

sub data {
    my $self = shift;
    $self->{'_data'} ||= $self->readData();
    return $self->{'_data'};
}

# Convert the Chart's data into a plottable form in $self->{'_data'}.
sub readData {
    my $self = shift;
    my @data;
    my @maxvals;

    # Note: you get a bad image if getSeriesIDs returns nothing
    # We need to handle errors better.
    my $series_ids = join(",", $self->getSeriesIDs());

    return [] unless $series_ids;

    # Work out the date boundaries for our data.
    my $dbh = Bugzilla->dbh;
    
    # The date used is the one given if it's in a sensible range; otherwise,
    # it's the earliest or latest date in the database as appropriate.
    my $datefrom = $dbh->selectrow_array("SELECT MIN(series_date) " . 
                                         "FROM series_data " .
                                         "WHERE series_id IN ($series_ids)");
    $datefrom = str2time($datefrom);

    if ($self->{'datefrom'} && $self->{'datefrom'} > $datefrom) {
        $datefrom = $self->{'datefrom'};
    }

    my $dateto = $dbh->selectrow_array("SELECT MAX(series_date) " . 
                                       "FROM series_data " .
                                       "WHERE series_id IN ($series_ids)");
    $dateto = str2time($dateto); 

    if ($self->{'dateto'} && $self->{'dateto'} < $dateto) {
        $dateto = $self->{'dateto'};
    }

    # Convert UNIX times back to a date format usable for SQL queries.
    my $sql_from = time2str('%Y-%m-%d', $datefrom);
    my $sql_to = time2str('%Y-%m-%d', $dateto);

    # Prepare the query which retrieves the data for each series
    my $query = "SELECT " . $dbh->sql_to_days('series_date') . " - " .
                            $dbh->sql_to_days('?') . ", series_value " .
                "FROM series_data " .
                "WHERE series_id = ? " .
                "AND series_date >= ?";
    if ($dateto) {
        $query .= " AND series_date <= ?";
    }
    
    my $sth = $dbh->prepare($query);

    my $gt_index = $self->{'gt'} ? scalar(@{$self->{'lines'}}) : undef;
    my $line_index = 0;

    $maxvals[$gt_index] = 0 if $gt_index;

    my @datediff_total;

    foreach my $line (@{$self->{'lines'}}) {        
        # Even if we end up with no data, we need an empty arrayref to prevent
        # errors in the PNG-generating code
        $data[$line_index] = [];
        $maxvals[$line_index] = 0;

        foreach my $series (@$line) {

            # Get the data for this series and add it on
            if ($dateto) {
                $sth->execute($sql_from, $series->{'series_id'}, $sql_from, $sql_to);
            }
            else {
                $sth->execute($sql_from, $series->{'series_id'}, $sql_from);
            }
            my $points = $sth->fetchall_arrayref();

            foreach my $point (@$points) {
                my ($datediff, $value) = @$point;
                $data[$line_index][$datediff] ||= 0;
                $data[$line_index][$datediff] += $value;
                if ($data[$line_index][$datediff] > $maxvals[$line_index]) {
                    $maxvals[$line_index] = $data[$line_index][$datediff];
                }

                $datediff_total[$datediff] += $value;

                # Add to the grand total, if we are doing that
                if ($gt_index) {
                    $data[$gt_index][$datediff] ||= 0;
                    $data[$gt_index][$datediff] += $value;
                    if ($data[$gt_index][$datediff] > $maxvals[$gt_index]) {
                        $maxvals[$gt_index] = $data[$gt_index][$datediff];
                    }
                }
            }
        }

        # We are done with the series making up this line, go to the next one
        $line_index++;
    }

    # calculate maximum y value
    if ($self->{'cumulate'}) {
        # Make sure we do not try to take the max of an array with undef values
        my @processed_datediff;
        while (@datediff_total) {
            my $datediff = shift @datediff_total;
            push @processed_datediff, $datediff if defined($datediff);
        }
        $self->{'y_max_value'} = max(@processed_datediff);
    }
    else {
        $self->{'y_max_value'} = max(@maxvals);
    }
    $self->{'y_max_value'} |= 1; # For log()

    # Align the max y value:
    #  For one- or two-digit numbers, increase y_max_value until divisible by 8
    #  For larger numbers, see the comments below to figure out what's going on
    if ($self->{'y_max_value'} < 100) {
        do {
            ++$self->{'y_max_value'};
        } while ($self->{'y_max_value'} % 8 != 0);
    }
    else {
        #  First, get the # of digits in the y_max_value
        my $num_digits = 1+int(log($self->{'y_max_value'})/log(10));

        # We want to zero out all but the top 2 digits
        my $mask_length = $num_digits - 2;
        $self->{'y_max_value'} /= 10**$mask_length;
        $self->{'y_max_value'} = int($self->{'y_max_value'});
        $self->{'y_max_value'} *= 10**$mask_length;

        # Add 10^$mask_length to the max value
        # Continue to increase until it's divisible by 8 * 10^($mask_length-1)
        # (Throwing in the -1 keeps at least the smallest digit at zero)
        do {
            $self->{'y_max_value'} += 10**$mask_length;
        } while ($self->{'y_max_value'} % (8*(10**($mask_length-1))) != 0);
    }

        
    # Add the x-axis labels into the data structure
    my $date_progression = generateDateProgression($datefrom, $dateto);
    unshift(@data, $date_progression);

    if ($self->{'gt'}) {
        # Add Grand Total to label list
        push(@{$self->{'labels'}}, $self->{'labelgt'});

        $data[$gt_index] ||= [];
    }

    return \@data;
}

# Flatten the data structure into a list of series_ids
sub getSeriesIDs {
    my $self = shift;
    my @series_ids;

    foreach my $line (@{$self->{'lines'}}) {
        foreach my $series (@$line) {
            push(@series_ids, $series->{'series_id'});
        }
    }

    return @series_ids;
}

# Class method to get the data necessary to populate the "select series"
# widgets on various pages.
sub getVisibleSeries {
    my %cats;

    my $grouplist = Bugzilla->user->groups_as_string;
    
    # Get all visible series
    my $dbh = Bugzilla->dbh;
    my $serieses = $dbh->selectall_arrayref("SELECT cc1.name, cc2.name, " .
                        "series.name, series.series_id " .
                        "FROM series " .
                        "INNER JOIN series_categories AS cc1 " .
                        "    ON series.category = cc1.id " .
                        "INNER JOIN series_categories AS cc2 " .
                        "    ON series.subcategory = cc2.id " .
                        "LEFT JOIN category_group_map AS cgm " .
                        "    ON series.category = cgm.category_id " .
                        "    AND cgm.group_id NOT IN($grouplist) " .
                        "WHERE creator = ? OR (is_public = 1 AND cgm.category_id IS NULL) " .
                   $dbh->sql_group_by('series.series_id', 'cc1.name, cc2.name, ' .
                                      'series.name'),
                        undef, Bugzilla->user->id);
    foreach my $series (@$serieses) {
        my ($cat, $subcat, $name, $series_id) = @$series;
        $cats{$cat}{$subcat}{$name} = $series_id;
    }

    return \%cats;
}

sub generateDateProgression {
    my ($datefrom, $dateto) = @_;
    my @progression;

    $dateto = $dateto || time();
    my $oneday = 60 * 60 * 24;

    # When the from and to dates are converted by str2time(), you end up with
    # a time figure representing midnight at the beginning of that day. We
    # adjust the times by 1/3 and 2/3 of a day respectively to prevent
    # edge conditions in time2str().
    $datefrom += $oneday / 3;
    $dateto += (2 * $oneday) / 3;

    while ($datefrom < $dateto) {
        push (@progression, time2str("%Y-%m-%d", $datefrom));
        $datefrom += $oneday;
    }

    return \@progression;
}

sub dump {
    my $self = shift;

    # Make sure we've read in our data
    my $data = $self->data;
    
    require Data::Dumper;
    say "<pre>Bugzilla::Chart object:";
    print html_quote(Data::Dumper::Dumper($self));
    print "</pre>";
}

1;