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| 1 | <?php |
| 2 | |
| 3 | /* |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation; under version 2 |
| 7 | * of the License (non-upgradable). |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 17 | * |
| 18 | * Copyright (c) 2013 (original work) Open Assessment Technologies SA (under the project TAO-PRODUCT); |
| 19 | * |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | namespace oat\taoQtiItem\model\qti\expression; |
| 24 | |
| 25 | use oat\taoQtiItem\model\qti\expression\CommonExpression; |
| 26 | use oat\taoQtiItem\model\qti\expression\Expression; |
| 27 | use oat\taoQtiItem\model\qti\response\Rule; |
| 28 | use common_Exception; |
| 29 | use Exception; |
| 30 | |
| 31 | /** |
| 32 | * Short description of class |
| 33 | * |
| 34 | * @access public |
| 35 | * @author Joel Bout, <joel.bout@tudor.lu> |
| 36 | * @package taoQTI |
| 37 | |
| 38 | */ |
| 39 | class CommonExpression extends Expression implements Rule |
| 40 | { |
| 41 | // --- ASSOCIATIONS --- |
| 42 | |
| 43 | |
| 44 | // --- ATTRIBUTES --- |
| 45 | |
| 46 | /** |
| 47 | * Short description of attribute subExpressions |
| 48 | * |
| 49 | * @access protected |
| 50 | * @var array |
| 51 | */ |
| 52 | protected $subExpressions = []; |
| 53 | |
| 54 | /** |
| 55 | * Short description of attribute value |
| 56 | * |
| 57 | * @access protected |
| 58 | */ |
| 59 | protected $value = null; |
| 60 | |
| 61 | /** |
| 62 | * Short description of attribute name |
| 63 | * |
| 64 | * @access protected |
| 65 | * @var string |
| 66 | */ |
| 67 | protected $name = ''; |
| 68 | |
| 69 | /** |
| 70 | * Short description of attribute attributes |
| 71 | * |
| 72 | * @access protected |
| 73 | * @var array |
| 74 | */ |
| 75 | protected $attributes = []; |
| 76 | |
| 77 | // --- OPERATIONS --- |
| 78 | |
| 79 | /** |
| 80 | * Short description of method getRule |
| 81 | * |
| 82 | * @access public |
| 83 | * @author Joel Bout, <joel.bout@tudor.lu> |
| 84 | * @return string |
| 85 | */ |
| 86 | public function getRule() |
| 87 | { |
| 88 | $returnValue = (string) ''; |
| 89 | |
| 90 | |
| 91 | // Get subExpressions |
| 92 | $subExpressionsRules = []; |
| 93 | foreach ($this->subExpressions as $subExpression) { |
| 94 | $subExpressionsRules[] = $subExpression->getRule(); |
| 95 | } |
| 96 | $subExpressionsJSON = implode(',', $subExpressionsRules); |
| 97 | |
| 98 | // Format options |
| 99 | $optionsJSON = count($this->attributes) ? '"' . addslashes(json_encode($this->attributes)) . '"' : 'null'; |
| 100 | |
| 101 | // Format rule function of the expression operator |
| 102 | switch ($this->name) { |
| 103 | case 'correct': |
| 104 | $returnValue = 'getCorrect("' . $this->attributes['identifier'] . '")'; |
| 105 | break; |
| 106 | case 'mapResponse': |
| 107 | $identifier = $this->attributes['identifier']; |
| 108 | $returnValue = 'mapResponse(' |
| 109 | . $optionsJSON |
| 110 | . ', getMap("' . $identifier . '"), getResponse("' . $identifier . '"))'; |
| 111 | break; |
| 112 | // Multiple is a Creation of List from parameters |
| 113 | case 'multiple': |
| 114 | $returnValue = 'createVariable("{\"type\":\"list\"}", ' . $subExpressionsJSON . ')'; |
| 115 | break; |
| 116 | // Null is a Creation of empty BaseTypeVariable |
| 117 | case 'null': |
| 118 | $returnValue = 'createVariable(null, null)'; |
| 119 | break; |
| 120 | // Ordered is a Creation of Tuple from parameters |
| 121 | case 'ordered': |
| 122 | $returnValue = 'createVariable("{\"type\":\"tuple\"}", ' . $subExpressionsJSON . ')'; |
| 123 | break; |
| 124 | case 'outcome': |
| 125 | $returnValue = 'getOutcome("' . $this->attributes['identifier'] . '")'; |
| 126 | break; |
| 127 | case 'setOutcomeValue': |
| 128 | //@todo remove this |
| 129 | throw new common_Exception('setOutcomeValue is not a valid expression'); |
| 130 | break; |
| 131 | case 'variable': |
| 132 | $returnValue = 'getVariable("' . $this->attributes['identifier'] . '")'; |
| 133 | break; |
| 134 | |
| 135 | default: |
| 136 | $returnValue = |
| 137 | $this->name . '(' |
| 138 | . $optionsJSON |
| 139 | . ($subExpressionsJSON != "" ? ', ' . $subExpressionsJSON : '') |
| 140 | . ')'; |
| 141 | } |
| 142 | |
| 143 | |
| 144 | return (string) $returnValue; |
| 145 | } |
| 146 | |
| 147 | /** |
| 148 | * Short description of method __construct |
| 149 | * |
| 150 | * @access public |
| 151 | * @author Joel Bout, <joel.bout@tudor.lu> |
| 152 | * @param string name |
| 153 | * @param array attributes |
| 154 | * @return mixed |
| 155 | */ |
| 156 | public function __construct($name, $attributes) |
| 157 | { |
| 158 | |
| 159 | $this->name = $name; |
| 160 | $this->attributes = $attributes; |
| 161 | } |
| 162 | |
| 163 | /** |
| 164 | * Short description of method setSubExpressions |
| 165 | * |
| 166 | * @access public |
| 167 | * @author Joel Bout, <joel.bout@tudor.lu> |
| 168 | * @param array expressions |
| 169 | * @return mixed |
| 170 | */ |
| 171 | public function setSubExpressions($expressions) |
| 172 | { |
| 173 | |
| 174 | $this->subExpressions = $expressions; |
| 175 | } |
| 176 | |
| 177 | /** |
| 178 | * Short description of method setValue |
| 179 | * |
| 180 | * @access public |
| 181 | * @author Joel Bout, <joel.bout@tudor.lu> |
| 182 | * @param value |
| 183 | * @return mixed |
| 184 | */ |
| 185 | public function setValue($value) |
| 186 | { |
| 187 | |
| 188 | |
| 189 | // Set the value of the expression and cast it function of the (defined) base type of the variable |
| 190 | if ($this->attributes['baseType']) { |
| 191 | switch ($this->attributes['baseType']) { |
| 192 | case 'boolean': |
| 193 | if (is_string($value)) { |
| 194 | $this->value = (bool)($value == 'true' || $value == '1' ? 1 : 0); |
| 195 | } elseif (is_bool($value)) { |
| 196 | $this->value = $value; |
| 197 | } elseif ($value == null) { |
| 198 | $this->value = null; |
| 199 | } else { |
| 200 | throw new Exception( |
| 201 | 'taoQTI_models_classes_QTI_response_ExpressionOperator::setValue : an error ' |
| 202 | . 'occured, the value [' . $value . '] is not a well formed boolean' |
| 203 | ); |
| 204 | } |
| 205 | break; |
| 206 | case 'float': |
| 207 | $this->value = (float)$value; |
| 208 | break; |
| 209 | case 'integer': |
| 210 | $this->value = (int)$value; |
| 211 | break; |
| 212 | case 'identifier': |
| 213 | case 'string': |
| 214 | $this->value = (string)$value; |
| 215 | break; |
| 216 | case 'pair': |
| 217 | $this->value = taoQTI_models_classes_Matching_VariableFactory::createJSONValueFromQTIData( |
| 218 | $value, |
| 219 | 'pair' |
| 220 | ); |
| 221 | break; |
| 222 | case 'directedPair': |
| 223 | $this->value = taoQTI_models_classes_Matching_VariableFactory::createJSONValueFromQTIData( |
| 224 | $value, |
| 225 | 'directedPair' |
| 226 | ); |
| 227 | break; |
| 228 | } |
| 229 | } |
| 230 | } |
| 231 | } |