|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace Sunnysideup\DefaultPredict\Extension; |
|
4
|
|
|
|
|
5
|
|
|
use SilverStripe\Core\Config\Config; |
|
6
|
|
|
use SilverStripe\ORM\DataExtension; |
|
7
|
|
|
use SilverStripe\ORM\DataObject; |
|
8
|
|
|
|
|
9
|
|
|
/** |
|
10
|
|
|
* adds meta tag functionality to the Page_Controller or another DataObject. |
|
11
|
|
|
* |
|
12
|
|
|
* @property Site|DefaultPredictExtension $owner |
|
13
|
|
|
*/ |
|
14
|
|
|
class DefaultPredictExtension extends DataExtension |
|
15
|
|
|
{ |
|
16
|
|
|
private static $base_default_predictor_limit = 5; |
|
17
|
|
|
|
|
18
|
|
|
private static $base_default_predictor_threshold = 0.5; |
|
19
|
|
|
|
|
20
|
|
|
/** |
|
21
|
|
|
* the greater the number, the less recency matters. |
|
22
|
|
|
* with a value of one, recency increases by 100% every step closer to the last record. |
|
23
|
|
|
* i.e the last record has five times more chance to the influencer |
|
24
|
|
|
* than the record that was created five steps ago. |
|
25
|
|
|
*/ |
|
26
|
|
|
private static $base_default_predictor_recency_factor = 0.5; |
|
27
|
|
|
|
|
28
|
|
|
private static $base_default_predict_exclude = [ |
|
29
|
|
|
'ID', |
|
30
|
|
|
'Created', |
|
31
|
|
|
'LastEdited', |
|
32
|
|
|
'Version', |
|
33
|
|
|
]; |
|
34
|
|
|
|
|
35
|
|
|
private static $fields_that_must_be_equal = [ |
|
36
|
|
|
'ClassName', |
|
37
|
|
|
]; |
|
38
|
|
|
|
|
39
|
|
|
public function populateDefaults() |
|
40
|
|
|
{ |
|
41
|
|
|
$owner = $this->getOwner(); |
|
42
|
|
|
$className = $owner->ClassName; |
|
43
|
|
|
|
|
44
|
|
|
// work out limit and treshold |
|
45
|
|
|
$limit = Config::inst()->get($className, 'default_predictor_limit') ?: |
|
46
|
|
|
Config::inst()->get(DefaultPredictExtension::class, 'base_default_predictor_limit'); |
|
47
|
|
|
|
|
48
|
|
|
$threshold = Config::inst()->get($className, 'default_predictor_threshold') ?: |
|
49
|
|
|
Config::inst()->get(DefaultPredictExtension::class, 'base_default_predictor_threshold'); |
|
50
|
|
|
|
|
51
|
|
|
$recencyFactor = Config::inst()->get($className, 'default_predictor_recency_factor') ?: |
|
52
|
|
|
Config::inst()->get(DefaultPredictExtension::class, 'base_default_predictor_recency_factor'); |
|
53
|
|
|
|
|
54
|
|
|
$fieldsThatMustBeEqual = Config::inst()->get($className, 'fields_that_must_be_equal') ?: |
|
55
|
|
|
Config::inst()->get(DefaultPredictExtension::class, 'fields_that_must_be_equal'); |
|
56
|
|
|
|
|
57
|
|
|
$predicts = $this->getDefaultPredictionPredictor($limit, $threshold, $recencyFactor, $fieldsThatMustBeEqual); |
|
58
|
|
|
|
|
59
|
|
|
// get class specific predictions |
|
60
|
|
|
if ($owner->hasMethod('getSpecificDefaultPredictions')) { |
|
61
|
|
|
$predicts = $predicts + $owner->getSpecificDefaultPredictions(); |
|
62
|
|
|
} |
|
63
|
|
|
|
|
64
|
|
|
foreach ($predicts as $fieldName => $value) { |
|
65
|
|
|
$owner->{$fieldName} = $value; |
|
66
|
|
|
} |
|
67
|
|
|
} |
|
68
|
|
|
|
|
69
|
|
|
protected function getDefaultPredictionPredictor(int $limit, float $threshold, float $recencyFactor, array $fieldsThatMustBeEqual): array |
|
70
|
|
|
{ |
|
71
|
|
|
$owner = $this->getOwner(); |
|
72
|
|
|
$className = $owner->ClassName; |
|
73
|
|
|
|
|
74
|
|
|
// set return variable |
|
75
|
|
|
$predicts = []; |
|
76
|
|
|
|
|
77
|
|
|
// get field names |
|
78
|
|
|
$fieldNames = $this->getDefaultPredictionFieldNames($className); |
|
79
|
|
|
|
|
80
|
|
|
// must be equal |
|
81
|
|
|
$mustBeEqual = []; |
|
82
|
|
|
foreach($fieldsThatMustBeEqual as $fieldThatMustBeEqual) { |
|
83
|
|
|
if(isset($fieldNames[$fieldThatMustBeEqual])) { |
|
84
|
|
|
$mustBeEqual[$fieldThatMustBeEqual] = $owner->{$fieldThatMustBeEqual}; |
|
85
|
|
|
} |
|
86
|
|
|
} |
|
87
|
|
|
// get last objects, based on limit; |
|
88
|
|
|
$objects = $className::get() |
|
89
|
|
|
->sort(['ID' => 'DESC']) |
|
90
|
|
|
->exclude(['ID' => $owner->ID]) |
|
91
|
|
|
->limit($limit) |
|
92
|
|
|
; |
|
93
|
|
|
if(count($mustBeEqual)) { |
|
94
|
|
|
$objects = $objects->filter($mustBeEqual); |
|
95
|
|
|
} |
|
96
|
|
|
// print_r($objects->column('Purpose')); |
|
97
|
|
|
// print_r($objects->column('Title')); |
|
98
|
|
|
//store objects in memory |
|
99
|
|
|
$objectArray = []; |
|
100
|
|
|
foreach ($objects as $object) { |
|
101
|
|
|
$objectArray[] = $object; |
|
102
|
|
|
} |
|
103
|
|
|
// put the latest one last so that we can give it more weight. |
|
104
|
|
|
$objectArray = array_reverse($objectArray); |
|
105
|
|
|
|
|
106
|
|
|
// get the field names |
|
107
|
|
|
// print_r($fieldNames); |
|
108
|
|
|
// loop through fields |
|
109
|
|
|
foreach ($fieldNames as $fieldName) { |
|
110
|
|
|
$valueArray = []; |
|
111
|
|
|
// loop through objects |
|
112
|
|
|
$max = 0; |
|
113
|
|
|
foreach ($objectArray as $object) { |
|
114
|
|
|
$value = $object->{$fieldName}; |
|
115
|
|
|
if (! $value) { |
|
116
|
|
|
$value = ''; |
|
117
|
|
|
} |
|
118
|
|
|
// give more weight to the last one used. |
|
119
|
|
|
for ($y = 0; $y <= $max; ++$y) { |
|
120
|
|
|
$valueArray[] = $value; |
|
121
|
|
|
} |
|
122
|
|
|
$max += $recencyFactor; |
|
123
|
|
|
} |
|
124
|
|
|
// print_r($fieldName); |
|
125
|
|
|
// print_r($valueArray); |
|
126
|
|
|
if (count($valueArray)) { |
|
127
|
|
|
// work out if there is a value that comes back a lot, and, if so, add it to predicts |
|
128
|
|
|
$possibleValue = $this->defaultPredictionPredictorBestContender($valueArray, $threshold); |
|
129
|
|
|
if ($possibleValue) { |
|
130
|
|
|
$predicts[$fieldName] = $possibleValue; |
|
131
|
|
|
} |
|
132
|
|
|
} |
|
133
|
|
|
} |
|
134
|
|
|
// print_r($predicts); |
|
135
|
|
|
return $predicts; |
|
136
|
|
|
} |
|
137
|
|
|
|
|
138
|
|
|
protected function getDefaultPredictionFieldNames(string $className): array |
|
139
|
|
|
{ |
|
140
|
|
|
$excludeBase = (array) Config::inst()->get(DefaultPredictExtension::class, 'base_default_predict_exclude'); |
|
141
|
|
|
$excludeMore = (array) Config::inst()->get($className, 'default_predict_exclude'); |
|
142
|
|
|
$exclude = array_merge($excludeBase, $excludeMore); |
|
143
|
|
|
|
|
144
|
|
|
// get db and has_one fields |
|
145
|
|
|
$fieldsDb = array_keys(Config::inst()->get($className, 'db')); |
|
146
|
|
|
$fieldsHasOne = array_keys(Config::inst()->get($className, 'has_one')); |
|
147
|
|
|
|
|
148
|
|
|
// add ID part to has_one fields |
|
149
|
|
|
array_walk($fieldsHasOne, function (&$value, $key) { |
|
|
|
|
|
|
150
|
|
|
$value .= 'ID'; |
|
151
|
|
|
}); |
|
152
|
|
|
|
|
153
|
|
|
// return merge of arrays minus the exclude ones. |
|
154
|
|
|
return array_diff( |
|
155
|
|
|
array_merge($fieldsDb, $fieldsHasOne), |
|
156
|
|
|
$exclude |
|
157
|
|
|
); |
|
158
|
|
|
} |
|
159
|
|
|
|
|
160
|
|
|
protected function defaultPredictionPredictorBestContender(array $valueArray, float $threshold) |
|
161
|
|
|
{ |
|
162
|
|
|
$averages = $this->defaultPredictionPredictorCalculateAverages($valueArray); |
|
163
|
|
|
// sort by the most common one |
|
164
|
|
|
arsort($averages); |
|
165
|
|
|
foreach ($averages as $value => $percentage) { |
|
166
|
|
|
if ($percentage > $threshold) { |
|
167
|
|
|
return $value; |
|
168
|
|
|
} |
|
169
|
|
|
|
|
170
|
|
|
return null; |
|
171
|
|
|
} |
|
172
|
|
|
|
|
173
|
|
|
return null; |
|
174
|
|
|
} |
|
175
|
|
|
|
|
176
|
|
|
protected function defaultPredictionPredictorCalculateAverages(array $array) |
|
177
|
|
|
{ |
|
178
|
|
|
$num = count($array); // provides the value for num |
|
179
|
|
|
|
|
180
|
|
|
return array_map( |
|
181
|
|
|
function ($val) use ($num) { |
|
182
|
|
|
return $val / $num; |
|
183
|
|
|
}, |
|
184
|
|
|
array_count_values($array) // provides the value for $val |
|
185
|
|
|
); |
|
186
|
|
|
} |
|
187
|
|
|
} |
|
188
|
|
|
|
sunnysideup /
silverstripe-default-predict
This check looks for parameters that have been defined for a function or method, but which are not used in the method body.