Complex classes like ResultList often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use ResultList, and based on these observations, apply Extract Interface, too.
1 | <?php |
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13 | class ResultList extends \ViewableData implements \SS_Limitable, \SS_List { |
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14 | |||
15 | /** |
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16 | * @var \Elastica\Index |
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17 | */ |
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18 | private $service; |
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19 | |||
20 | /** |
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21 | * @var \Elastica\Query |
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22 | */ |
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23 | private $query; |
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24 | |||
25 | /** |
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26 | * List of types to search for, default (blank) returns all |
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27 | * @var string |
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28 | */ |
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29 | |||
30 | private $types = ''; |
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31 | |||
32 | /** |
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33 | * Filters, i.e. selected aggregations, to apply to the search |
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34 | */ |
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35 | private $filters = array(); |
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36 | |||
37 | /** |
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38 | * An array list of aggregations from this search |
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39 | * @var ArrayList |
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40 | */ |
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41 | private $aggregations; |
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42 | |||
43 | |||
44 | /** |
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45 | * Create a search and then optionally tweak it. Actual search is only performed against |
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46 | * Elasticsearch when the getResults() method is called. |
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47 | * |
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48 | * @param ElasticaService $service object used to communicate with Elasticsearch |
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49 | * @param Query $query Elastica query object, created via QueryGenerator |
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50 | * @param string $queryText the text from the query |
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51 | * @param array $filters Selected filters, used for aggregation purposes only |
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52 | * (i.e. query already filtered prior to this) |
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53 | */ |
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54 | 9 | public function __construct(ElasticaService $service, Query $query, $queryText, $filters = array()) { |
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55 | 9 | $this->service = $service; |
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56 | 9 | $this->query = $query; |
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57 | 9 | $this->originalQueryText = $queryText; |
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58 | 9 | $this->filters = $filters; |
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59 | 9 | } |
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60 | |||
61 | public function __clone() { |
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64 | |||
65 | /** |
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66 | * @return \Elastica\Index |
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67 | */ |
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68 | public function getService() { |
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71 | |||
72 | /** |
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73 | * Set a new list of types (SilverStripe classes) to search for |
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74 | * @param string $newTypes comma separated list of types to search for |
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75 | */ |
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76 | 9 | public function setTypes($newTypes) { |
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79 | |||
80 | |||
81 | /** |
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82 | * @return \Elastica\Query |
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83 | */ |
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84 | 2 | public function getQuery() { |
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87 | |||
88 | |||
89 | /** |
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90 | * Get the aggregation results for this query. Should only be called |
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91 | * after $this->getResults() has been executed. |
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92 | * Note this will be an empty array list if there is no aggregation |
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93 | * |
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94 | * @return ArrayList ArrayList of the aggregated results for this query |
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95 | */ |
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96 | 9 | public function getAggregations() { |
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99 | |||
100 | /** |
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101 | * @return array |
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102 | */ |
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103 | 9 | public function getResults() { |
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104 | 9 | if(!isset($this->_cachedResults)) { |
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105 | 9 | $ers = $this->service->search($this->query, $this->types); |
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106 | |||
107 | 9 | if(isset($ers->MoreLikeThisTerms)) { |
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108 | $this->MoreLikeThisTerms = $ers->MoreLikeThisTerms; |
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109 | } |
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110 | |||
111 | 9 | if(isset($ers->getSuggests()['query-phrase-suggestions'])) { |
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112 | 9 | $suggest = $ers->getSuggests()['query-phrase-suggestions']; |
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113 | 9 | $suggestedPhraseAndHL = ElasticaUtil::getPhraseSuggestion($suggest); |
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114 | 9 | if($suggestedPhraseAndHL) { |
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115 | $this->SuggestedQuery = $suggestedPhraseAndHL['suggestedQuery']; |
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116 | $this->SuggestedQueryHighlighted = $suggestedPhraseAndHL['suggestedQueryHighlighted']; |
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117 | } |
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118 | 9 | } |
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119 | |||
120 | 9 | $this->TotalItems = $ers->getTotalHits(); |
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121 | 9 | $this->TotalTime = $ers->getTotalTime(); |
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122 | 9 | $this->_cachedResults = $ers->getResults(); |
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123 | // make the aggregations available to the templating, title casing |
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124 | // to be consistent with normal templating conventions |
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125 | 9 | $aggs = $ers->getAggregations(); |
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126 | |||
127 | // array of index field name to human readable title |
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128 | 9 | $indexedFieldTitleMapping = array(); |
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129 | |||
130 | // optionally remap keys and store chosen aggregations from get params |
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131 | 9 | if(isset($this->SearchHelper)) { |
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132 | 9 | $manipulator = \Injector::inst()->create($this->SearchHelper); |
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133 | 9 | $manipulator->query = $this->query; |
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134 | 9 | $manipulator->updateAggregation($aggs); |
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135 | |||
136 | 9 | $indexedFieldTitleMapping = $manipulator->getIndexFieldTitleMapping(); |
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137 | 9 | } |
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138 | 9 | $aggsTemplate = new \ArrayList(); |
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139 | |||
140 | // Convert the buckets into a form suitable for SilverStripe templates |
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141 | 9 | $queryText = $this->originalQueryText; |
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142 | |||
143 | // if not search term remove it and aggregate with a blank query |
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144 | 9 | if($queryText == '' && sizeof($aggs) > 0) { |
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145 | 3 | $params = $this->query->getParams(); |
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146 | 3 | unset($params['query']); |
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147 | 3 | $this->query->setParams($params); |
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148 | 3 | $queryText = ''; |
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149 | 3 | } |
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150 | |||
151 | // get the base URL for the current facets selected |
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152 | 9 | $baseURL = \Controller::curr()->Link() . '?'; |
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153 | 9 | $prefixAmp = false; |
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154 | 9 | if($queryText !== '') { |
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155 | 7 | $baseURL .= 'q=' . urlencode($queryText); |
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156 | 7 | $prefixAmp = true; |
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157 | 7 | } |
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158 | |||
159 | // now add the selected facets |
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160 | 9 | foreach($this->filters as $key => $value) { |
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161 | 4 | if($prefixAmp) { |
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162 | 4 | $baseURL .= '&'; |
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163 | 4 | } else { |
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164 | 1 | $prefixAmp = true; |
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165 | } |
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166 | 4 | $baseURL .= $key . '=' . urlencode($value); |
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167 | 9 | } |
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168 | |||
169 | 9 | foreach(array_keys($aggs) as $key) { |
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170 | 9 | $aggDO = new \DataObject(); |
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171 | //FIXME - Camel case separate here |
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172 | 9 | if(isset($indexedFieldTitleMapping[$key])) { |
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173 | 9 | $aggDO->Name = $indexedFieldTitleMapping[$key]; |
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174 | 9 | } else { |
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175 | 9 | $aggDO->Name = $key; |
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176 | } |
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177 | |||
178 | $aggDO->Slug = preg_replace( |
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179 | 9 | '/[^a-zA-Z0-9_]/', '_', strtolower($aggDO->Name) |
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180 | 9 | ); |
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181 | 9 | ||
182 | 9 | // now the buckets |
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183 | 9 | if(isset($aggs[$key]['buckets'])) { |
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184 | 9 | $bucketsAL = new \ArrayList(); |
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185 | 9 | foreach($aggs[$key]['buckets'] as $value) { |
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186 | 9 | $ct = new \DataObject(); |
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187 | 9 | $ct->Key = $value['key']; |
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188 | 9 | $ct->DocumentCount = $value['doc_count']; |
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189 | 2 | $query[$key] = $value; |
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190 | 2 | if($prefixAmp) { |
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191 | $url = $baseURL . '&'; |
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192 | } else { |
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193 | $url = $baseURL; |
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194 | 9 | $prefixAmp = true; |
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195 | } |
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196 | 4 | ||
197 | 3 | // check if currently selected |
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198 | if(isset($this->filters[$key])) { |
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199 | |||
200 | 3 | if($this->filters[$key] === (string)$value['key']) { |
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201 | $ct->IsSelected = true; |
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202 | 3 | // mark this facet as having been selected, so optional toggling |
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203 | // of the display of the facet can be done via the template. |
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204 | $aggDO->IsSelected = true; |
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205 | 3 | ||
206 | 3 | $urlParam = $key . '=' . urlencode($this->filters[$key]); |
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207 | 3 | ||
208 | 3 | // possible ampersand combos to remove |
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209 | 3 | $v2 = '&' . $urlParam; |
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210 | 3 | $v3 = $urlParam . '&'; |
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211 | 3 | $url = str_replace($v2, '', $url); |
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212 | 4 | $url = str_replace($v3, '', $url); |
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213 | 9 | $url = str_replace($urlParam, '', $url); |
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214 | 9 | $ct->URL = $url; |
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215 | } |
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216 | } else { |
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217 | 9 | $url .= $key . '=' . urlencode($value['key']); |
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218 | $prefixAmp = true; |
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219 | 9 | } |
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220 | 9 | ||
221 | 9 | $url = rtrim($url, '&'); |
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222 | |||
223 | $ct->URL = $url; |
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224 | 9 | $bucketsAL->push($ct); |
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225 | 3 | } |
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226 | 3 | ||
227 | 3 | // in the case of range queries we wish to remove the non selected ones |
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228 | 3 | if($aggDO->IsSelected) { |
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229 | 3 | $newList = new \ArrayList(); |
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230 | foreach($bucketsAL->getIterator() as $bucket) { |
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231 | 3 | if($bucket->IsSelected) { |
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232 | $newList->push($bucket); |
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233 | 3 | break; |
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234 | 3 | } |
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235 | 9 | } |
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236 | |||
237 | $bucketsAL = $newList; |
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238 | 9 | } |
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239 | 9 | $aggDO->Buckets = $bucketsAL; |
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240 | 9 | ||
241 | 9 | ||
242 | 9 | } |
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243 | 9 | $aggsTemplate->push($aggDO); |
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244 | } |
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245 | $this->aggregations = $aggsTemplate; |
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246 | } |
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247 | 9 | return $this->_cachedResults; |
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248 | 9 | } |
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249 | 9 | ||
250 | |||
251 | public function getTotalItems() { |
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255 | |||
256 | |||
257 | public function getTotalTime() { |
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260 | |||
261 | public function getIterator() { |
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262 | return $this->toArrayList()->getIterator(); |
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263 | } |
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264 | |||
265 | public function limit($limit, $offset = 0) { |
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273 | |||
274 | /** |
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275 | * Converts results of type {@link \Elastica\Result} |
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276 | 2 | * into their respective {@link DataObject} counterparts. |
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277 | 2 | * |
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278 | * @return array DataObject[] |
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279 | */ |
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280 | 2 | public function toArray() { |
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281 | 2 | $result = array(); |
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282 | 2 | ||
283 | /** @var $found \Elastica\Result[] */ |
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284 | 2 | $found = $this->getResults(); |
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285 | 2 | $needed = array(); |
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286 | $retrieved = array(); |
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287 | 2 | ||
288 | 2 | foreach($found as $item) { |
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289 | 2 | $type = $item->getType(); |
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290 | 2 | ||
291 | 2 | if(!array_key_exists($type, $needed)) { |
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292 | $needed[$type] = array($item->getId()); |
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293 | 2 | $retrieved[$type] = array(); |
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294 | } else { |
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295 | 2 | $needed[$type][] = $item->getId(); |
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296 | 2 | } |
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297 | 2 | } |
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298 | 2 | ||
299 | 2 | foreach($needed as $class => $ids) { |
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300 | foreach($class::get()->byIDs($ids) as $record) { |
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301 | $retrieved[$class][$record->ID] = $record; |
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302 | 2 | } |
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303 | } |
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304 | 2 | ||
305 | // Title and Link are special cases |
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306 | 2 | $ignore = array('Title', 'Link', 'Title.standard', 'Link.standard'); |
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307 | |||
308 | 2 | foreach($found as $item) { |
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309 | 2 | // Safeguards against indexed items which might no longer be in the DB |
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310 | 2 | if(array_key_exists($item->getId(), $retrieved[$item->getType()])) { |
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311 | |||
312 | $data_object = $retrieved[$item->getType()][$item->getId()]; |
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313 | $data_object->setElasticaResult($item); |
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314 | 2 | $highlights = $item->getHighlights(); |
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315 | 2 | ||
316 | //$snippets will contain the highlights shown in the body of the search result |
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317 | 2 | //$namedSnippets will be used to add highlights to the Link and Title |
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318 | $snippets = new \ArrayList(); |
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319 | $namedSnippets = new \ArrayList(); |
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320 | |||
321 | foreach(array_keys($highlights) as $fieldName) { |
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322 | $fieldSnippets = new \ArrayList(); |
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323 | |||
324 | foreach($highlights[$fieldName] as $snippet) { |
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325 | $do = new \DataObject(); |
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326 | $do->Snippet = $snippet; |
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327 | |||
328 | // skip title and link in the summary of highlights |
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329 | if(!in_array($fieldName, $ignore)) { |
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330 | $snippets->push($do); |
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331 | } |
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332 | |||
333 | $fieldSnippets->push($do); |
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334 | } |
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335 | |||
336 | if($fieldSnippets->count() > 0) { |
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337 | //Fields may have a dot in their name, e.g. Title.standard - take this into account |
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338 | //As dots are an issue with template syntax, store as Title_standard |
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339 | $splits = explode('.', $fieldName); |
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340 | if(sizeof($splits) == 1) { |
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341 | $namedSnippets->$fieldName = $fieldSnippets; |
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342 | } else { |
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343 | // The Title.standard case, for example |
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344 | $splits = explode('.', $fieldName); |
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345 | $compositeFielddName = $splits[0] . '_' . $splits[1]; |
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346 | $namedSnippets->$compositeFielddName = $fieldSnippets; |
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347 | } |
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348 | 2 | ||
349 | } |
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350 | |||
351 | 2 | ||
352 | 2 | } |
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353 | |||
354 | 2 | ||
355 | $data_object->SearchHighlights = $snippets; |
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356 | 2 | $data_object->SearchHighlightsByField = $namedSnippets; |
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357 | 2 | ||
358 | $result[] = $data_object; |
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359 | |||
360 | 2 | } |
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361 | } |
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362 | |||
363 | |||
364 | return $result; |
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365 | } |
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366 | |||
367 | public function toArrayList() { |
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370 | |||
371 | public function toNestedArray() { |
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380 | |||
381 | public function first() { |
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385 | |||
386 | public function last() { |
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390 | |||
391 | public function map($key = 'ID', $title = 'Title') { |
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394 | |||
395 | public function column($col = 'ID') { |
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408 | |||
409 | 2 | public function each($callback) { |
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412 | |||
413 | public function count() { |
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416 | |||
417 | /** |
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418 | * @ignore |
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419 | */ |
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420 | public function offsetExists($offset) { |
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423 | |||
424 | /** |
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425 | * @ignore |
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426 | */ |
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427 | public function offsetGet($offset) { |
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430 | |||
431 | /** |
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432 | * @ignore |
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433 | */ |
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434 | public function offsetSet($offset, $value) { |
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437 | |||
438 | /** |
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439 | * @ignore |
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440 | */ |
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441 | public function offsetUnset($offset) { |
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444 | |||
445 | /** |
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446 | * @ignore |
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447 | */ |
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448 | public function add($item) { |
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451 | |||
452 | /** |
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453 | * @ignore |
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454 | */ |
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455 | public function remove($item) { |
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458 | |||
459 | /** |
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460 | * @ignore |
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461 | */ |
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462 | public function find($key, $value) { |
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465 | |||
466 | } |
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467 |
Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property.
Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property..