1 | <?php |
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2 | // +-----------------------------------------------------------------------+ |
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3 | // | Piwigo - a PHP based photo gallery | |
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4 | // +-----------------------------------------------------------------------+ |
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5 | // | Copyright(C) 2008-2011 Piwigo Team http://piwigo.org | |
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6 | // | Copyright(C) 2003-2008 PhpWebGallery Team http://phpwebgallery.net | |
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7 | // | Copyright(C) 2002-2003 Pierrick LE GALL http://le-gall.net/pierrick | |
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8 | // +-----------------------------------------------------------------------+ |
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9 | // | This program is free software; you can redistribute it and/or modify | |
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10 | // | it under the terms of the GNU General Public License as published by | |
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11 | // | the Free Software Foundation | |
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12 | // | | |
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13 | // | This program is distributed in the hope that it will be useful, but | |
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14 | // | WITHOUT ANY WARRANTY; without even the implied warranty of | |
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15 | // | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
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16 | // | General Public License for more details. | |
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17 | // | | |
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18 | // | You should have received a copy of the GNU General Public License | |
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19 | // | along with this program; if not, write to the Free Software | |
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20 | // | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
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21 | // | USA. | |
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22 | // +-----------------------------------------------------------------------+ |
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23 | |
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24 | |
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25 | /** |
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26 | * returns search rules stored into a serialized array in "search" |
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27 | * table. Each search rules set is numericaly identified. |
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28 | * |
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29 | * @param int search_id |
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30 | * @return array |
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31 | */ |
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32 | function get_search_array($search_id) |
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33 | { |
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34 | if (!is_numeric($search_id)) |
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35 | { |
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36 | die('Search id must be an integer'); |
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37 | } |
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38 | |
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39 | $query = ' |
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40 | SELECT rules |
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41 | FROM '.SEARCH_TABLE.' |
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42 | WHERE id = '.$search_id.' |
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43 | ;'; |
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44 | list($serialized_rules) = pwg_db_fetch_row(pwg_query($query)); |
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45 | |
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46 | return unserialize($serialized_rules); |
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47 | } |
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48 | |
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49 | /** |
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50 | * returns the SQL clause from a search identifier |
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51 | * |
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52 | * Search rules are stored in search table as a serialized array. This array |
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53 | * need to be transformed into an SQL clause to be used in queries. |
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54 | * |
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55 | * @param array search |
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56 | * @return string |
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57 | */ |
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58 | function get_sql_search_clause($search) |
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59 | { |
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60 | // SQL where clauses are stored in $clauses array during query |
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61 | // construction |
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62 | $clauses = array(); |
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63 | |
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64 | foreach (array('file','name','comment','author') as $textfield) |
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65 | { |
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66 | if (isset($search['fields'][$textfield])) |
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67 | { |
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68 | $local_clauses = array(); |
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69 | foreach ($search['fields'][$textfield]['words'] as $word) |
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70 | { |
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71 | array_push($local_clauses, $textfield." LIKE '%".$word."%'"); |
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72 | } |
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73 | |
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74 | // adds brackets around where clauses |
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75 | $local_clauses = prepend_append_array_items($local_clauses, '(', ')'); |
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76 | |
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77 | array_push( |
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78 | $clauses, |
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79 | implode( |
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80 | ' '.$search['fields'][$textfield]['mode'].' ', |
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81 | $local_clauses |
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82 | ) |
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83 | ); |
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84 | } |
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85 | } |
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86 | |
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87 | if (isset($search['fields']['allwords'])) |
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88 | { |
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89 | $fields = array('file', 'name', 'comment', 'author'); |
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90 | // in the OR mode, request bust be : |
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91 | // ((field1 LIKE '%word1%' OR field2 LIKE '%word1%') |
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92 | // OR (field1 LIKE '%word2%' OR field2 LIKE '%word2%')) |
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93 | // |
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94 | // in the AND mode : |
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95 | // ((field1 LIKE '%word1%' OR field2 LIKE '%word1%') |
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96 | // AND (field1 LIKE '%word2%' OR field2 LIKE '%word2%')) |
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97 | $word_clauses = array(); |
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98 | foreach ($search['fields']['allwords']['words'] as $word) |
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99 | { |
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100 | $field_clauses = array(); |
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101 | foreach ($fields as $field) |
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102 | { |
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103 | array_push($field_clauses, $field." LIKE '%".$word."%'"); |
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104 | } |
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105 | // adds brackets around where clauses |
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106 | array_push( |
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107 | $word_clauses, |
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108 | implode( |
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109 | "\n OR ", |
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110 | $field_clauses |
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111 | ) |
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112 | ); |
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113 | } |
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114 | |
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115 | array_walk( |
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116 | $word_clauses, |
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117 | create_function('&$s','$s="(".$s.")";') |
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118 | ); |
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119 | |
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120 | array_push( |
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121 | $clauses, |
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122 | "\n ". |
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123 | implode( |
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124 | "\n ". |
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125 | $search['fields']['allwords']['mode']. |
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126 | "\n ", |
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127 | $word_clauses |
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128 | ) |
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129 | ); |
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130 | } |
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131 | |
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132 | foreach (array('date_available', 'date_creation') as $datefield) |
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133 | { |
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134 | if (isset($search['fields'][$datefield])) |
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135 | { |
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136 | array_push( |
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137 | $clauses, |
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138 | $datefield." = '".$search['fields'][$datefield]['date']."'" |
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139 | ); |
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140 | } |
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141 | |
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142 | foreach (array('after','before') as $suffix) |
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143 | { |
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144 | $key = $datefield.'-'.$suffix; |
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145 | |
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146 | if (isset($search['fields'][$key])) |
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147 | { |
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148 | array_push( |
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149 | $clauses, |
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150 | |
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151 | $datefield. |
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152 | ($suffix == 'after' ? ' >' : ' <'). |
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153 | ($search['fields'][$key]['inc'] ? '=' : ''). |
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154 | " '".$search['fields'][$key]['date']."'" |
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155 | |
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156 | ); |
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157 | } |
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158 | } |
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159 | } |
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160 | |
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161 | if (isset($search['fields']['cat'])) |
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162 | { |
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163 | if ($search['fields']['cat']['sub_inc']) |
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164 | { |
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165 | // searching all the categories id of sub-categories |
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166 | $cat_ids = get_subcat_ids($search['fields']['cat']['words']); |
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167 | } |
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168 | else |
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169 | { |
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170 | $cat_ids = $search['fields']['cat']['words']; |
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171 | } |
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172 | |
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173 | $local_clause = 'category_id IN ('.implode(',', $cat_ids).')'; |
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174 | array_push($clauses, $local_clause); |
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175 | } |
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176 | |
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177 | // adds brackets around where clauses |
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178 | $clauses = prepend_append_array_items($clauses, '(', ')'); |
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179 | |
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180 | $where_separator = |
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181 | implode( |
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182 | "\n ".$search['mode'].' ', |
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183 | $clauses |
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184 | ); |
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185 | |
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186 | $search_clause = $where_separator; |
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187 | |
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188 | return $search_clause; |
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189 | } |
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190 | |
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191 | /** |
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192 | * returns the list of items corresponding to the advanced search array |
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193 | * |
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194 | * @param array search |
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195 | * @return array |
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196 | */ |
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197 | function get_regular_search_results($search, $images_where) |
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198 | { |
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199 | global $conf; |
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200 | $forbidden = get_sql_condition_FandF( |
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201 | array |
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202 | ( |
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203 | 'forbidden_categories' => 'category_id', |
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204 | 'visible_categories' => 'category_id', |
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205 | 'visible_images' => 'id' |
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206 | ), |
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207 | "\n AND" |
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208 | ); |
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209 | |
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210 | $items = array(); |
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211 | $tag_items = array(); |
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212 | |
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213 | if (isset($search['fields']['tags'])) |
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214 | { |
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215 | $tag_items = get_image_ids_for_tags( |
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216 | $search['fields']['tags']['words'], |
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217 | $search['fields']['tags']['mode'] |
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218 | ); |
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219 | } |
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220 | |
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221 | $search_clause = get_sql_search_clause($search); |
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222 | |
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223 | if (!empty($search_clause)) |
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224 | { |
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225 | $query = ' |
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226 | SELECT DISTINCT(id) |
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227 | FROM '.IMAGES_TABLE.' i |
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228 | INNER JOIN '.IMAGE_CATEGORY_TABLE.' AS ic ON id = ic.image_id |
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229 | WHERE '.$search_clause; |
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230 | if (!empty($images_where)) |
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231 | { |
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232 | $query .= "\n AND ".$images_where; |
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233 | } |
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234 | $query .= $forbidden.' |
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235 | '.$conf['order_by']; |
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236 | $items = array_from_query($query, 'id'); |
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237 | } |
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238 | |
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239 | if ( !empty($tag_items) ) |
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240 | { |
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241 | switch ($search['mode']) |
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242 | { |
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243 | case 'AND': |
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244 | if (empty($search_clause)) |
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245 | { |
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246 | $items = $tag_items; |
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247 | } |
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248 | else |
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249 | { |
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250 | $items = array_values( array_intersect($items, $tag_items) ); |
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251 | } |
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252 | break; |
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253 | case 'OR': |
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254 | $before_count = count($items); |
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255 | $items = array_unique( |
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256 | array_merge( |
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257 | $items, |
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258 | $tag_items |
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259 | ) |
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260 | ); |
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261 | break; |
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262 | } |
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263 | } |
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264 | |
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265 | return $items; |
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266 | } |
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267 | |
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268 | |
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269 | if (function_exists('mb_strtolower')) |
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270 | { |
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271 | function transliterate($term) |
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272 | { |
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273 | return remove_accents( mb_strtolower($term) ); |
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274 | } |
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275 | } |
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276 | else |
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277 | { |
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278 | function transliterate($term) |
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279 | { |
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280 | return remove_accents( strtolower($term) ); |
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281 | } |
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282 | } |
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283 | |
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284 | function is_word_char($ch) |
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285 | { |
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286 | return ($ch>='0' && $ch<='9') || ($ch>='a' && $ch<='z') || ($ch>='A' && $ch<='Z') || ord($ch)>127; |
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287 | } |
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288 | |
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289 | /** |
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290 | * analyzes and splits the quick/query search query $q into tokens |
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291 | * q='john bill' => 2 tokens 'john' 'bill' |
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292 | * Special characters for MySql full text search (+,<,>,~) appear in the token modifiers. |
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293 | * The query can contain a phrase: 'Pierre "New York"' will return 'pierre' qnd 'new york'. |
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294 | */ |
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295 | function analyse_qsearch($q, &$qtokens, &$qtoken_modifiers) |
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296 | { |
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297 | $q = stripslashes($q); |
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298 | $tokens = array(); |
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299 | $token_modifiers = array(); |
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300 | $crt_token = ""; |
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301 | $crt_token_modifier = ""; |
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302 | $state = 0; |
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303 | |
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304 | for ($i=0; $i<strlen($q); $i++) |
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305 | { |
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306 | $ch = $q[$i]; |
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307 | switch ($state) |
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308 | { |
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309 | case 0: |
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310 | if ($ch=='"') |
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311 | { |
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312 | $tokens[] = $crt_token; $token_modifiers[] = $crt_token_modifier; |
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313 | $crt_token = ""; $crt_token_modifier = "q"; |
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314 | $state=1; |
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315 | } |
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316 | elseif ( $ch=='*' ) |
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317 | { // wild card |
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318 | if (strlen($crt_token)) |
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319 | { |
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320 | $crt_token .= $ch; |
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321 | } |
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322 | else |
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323 | { |
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324 | $crt_token_modifier .= '*'; |
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325 | } |
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326 | } |
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327 | elseif ( strcspn($ch, '+-><~')==0 ) |
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328 | { //special full text modifier |
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329 | if (strlen($crt_token)) |
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330 | { |
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331 | $tokens[] = $crt_token; $token_modifiers[] = $crt_token_modifier; |
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332 | $crt_token = ""; $crt_token_modifier = ""; |
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333 | } |
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334 | $crt_token_modifier .= $ch; |
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335 | } |
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336 | elseif (preg_match('/[\s,.;!\?]+/', $ch)) |
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337 | { // white space |
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338 | if (strlen($crt_token)) |
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339 | { |
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340 | $tokens[] = $crt_token; $token_modifiers[] = $crt_token_modifier; |
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341 | $crt_token = ""; $crt_token_modifier = ""; |
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342 | } |
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343 | } |
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344 | else |
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345 | { |
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346 | $crt_token .= $ch; |
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347 | } |
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348 | break; |
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349 | case 1: // qualified with quotes |
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350 | switch ($ch) |
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351 | { |
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352 | case '"': |
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353 | $tokens[] = $crt_token; $token_modifiers[] = $crt_token_modifier; |
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354 | $crt_token = ""; $crt_token_modifier = ""; |
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355 | $state=0; |
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356 | break; |
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357 | default: |
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358 | $crt_token .= $ch; |
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359 | } |
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360 | break; |
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361 | } |
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362 | } |
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363 | if (strlen($crt_token)) |
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364 | { |
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365 | $tokens[] = $crt_token; |
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366 | $token_modifiers[] = $crt_token_modifier; |
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367 | } |
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368 | |
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369 | $qtokens = array(); |
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370 | $qtoken_modifiers = array(); |
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371 | for ($i=0; $i<count($tokens); $i++) |
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372 | { |
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373 | if (strstr($token_modifiers[$i], 'q')===false) |
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374 | { |
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375 | if ( substr($tokens[$i], -1)=='*' ) |
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376 | { |
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377 | $tokens[$i] = rtrim($tokens[$i], '*'); |
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378 | $token_modifiers[$i] .= '*'; |
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379 | } |
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380 | } |
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381 | if ( strlen($tokens[$i])==0) |
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382 | continue; |
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383 | $qtokens[] = $tokens[$i]; |
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384 | $qtoken_modifiers[] = $token_modifiers[$i]; |
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385 | } |
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386 | } |
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387 | |
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388 | |
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389 | /** |
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390 | * returns the LIKE sql clause corresponding to the quick search query |
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391 | * that has been split into tokens |
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392 | * for example file LIKE '%john%' OR file LIKE '%bill%'. |
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393 | */ |
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394 | function get_qsearch_like_clause($tokens, $token_modifiers, $field) |
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395 | { |
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396 | $clauses = array(); |
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397 | for ($i=0; $i<count($tokens); $i++) |
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398 | { |
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399 | $token = trim($tokens[$i], '%'); |
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400 | if (strstr($token_modifiers[$i], '-')!==false) |
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401 | continue; |
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402 | if ( strlen($token)==0 ) |
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403 | continue; |
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404 | $token = addslashes($token); |
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405 | $token = str_replace( array('%','_'), array('\\%','\\_'), $token); // escape LIKE specials %_ |
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406 | $clauses[] = $field.' LIKE \'%'.$token.'%\''; |
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407 | } |
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408 | |
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409 | return count($clauses) ? '('.implode(' OR ', $clauses).')' : null; |
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410 | } |
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411 | |
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412 | /** |
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413 | * returns the search results corresponding to a quick/query search. |
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414 | * A quick/query search returns many items (search is not strict), but results |
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415 | * are sorted by relevance unless $super_order_by is true. Returns: |
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416 | * array ( |
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417 | * 'items' => array(85,68,79...) |
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418 | * 'qs' => array( |
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419 | * 'matching_tags' => array of matching tags |
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420 | * 'matching_cats' => array of matching categories |
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421 | * 'matching_cats_no_images' =>array(99) - matching categories without images |
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422 | * )) |
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423 | * |
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424 | * @param string q |
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425 | * @param bool super_order_by |
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426 | * @param string images_where optional aditional restriction on images table |
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427 | * @return array |
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428 | */ |
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429 | function get_quick_search_results($q, $super_order_by, $images_where='') |
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430 | { |
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431 | global $user, $conf; |
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432 | |
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433 | $search_results = |
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434 | array( |
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435 | 'items' => array(), |
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436 | 'qs' => array('q'=>stripslashes($q)), |
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437 | ); |
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438 | $q = trim($q); |
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439 | if (empty($q)) |
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440 | { |
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441 | return $search_results; |
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442 | } |
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443 | |
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444 | analyse_qsearch($q, $tokens, $token_modifiers); |
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445 | |
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446 | $q_like_field = '@@__db_field__@@'; //something never in a search |
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447 | $q_like_clause = get_qsearch_like_clause($tokens, $token_modifiers, $q_like_field ); |
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448 | |
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449 | // Step 1 - first we find matches in #images table =========================== |
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450 | $where_clauses='MATCH(i.name, i.comment) AGAINST( \''.$q.'\' IN BOOLEAN MODE)'; |
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451 | if (!empty($q_like_clause)) |
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452 | { |
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453 | $where_clauses .= ' |
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454 | OR '. str_replace($q_like_field, 'CONVERT(file, CHAR)', $q_like_clause); |
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455 | $where_clauses = '('.$where_clauses.')'; |
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456 | } |
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457 | $where_clauses = array($where_clauses); |
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458 | if (!empty($images_where)) |
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459 | { |
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460 | $where_clauses[]='('.$images_where.')'; |
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461 | } |
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462 | $where_clauses[] .= get_sql_condition_FandF |
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463 | ( |
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464 | array( 'visible_images' => 'i.id' ), null, true |
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465 | ); |
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466 | $query = ' |
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467 | SELECT i.id, |
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468 | MATCH(i.name, i.comment) AGAINST( \''.$q.'\' IN BOOLEAN MODE) AS weight |
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469 | FROM '.IMAGES_TABLE.' i |
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470 | WHERE '.implode("\n AND ", $where_clauses); |
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471 | |
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472 | $by_weights=array(); |
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473 | $result = pwg_query($query); |
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474 | while ($row = pwg_db_fetch_assoc($result)) |
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475 | { // weight is important when sorting images by relevance |
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476 | if ($row['weight']) |
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477 | { |
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478 | $by_weights[(int)$row['id']] = 2*$row['weight']; |
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479 | } |
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480 | else |
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481 | {//full text does not match but file name match |
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482 | $by_weights[(int)$row['id']] = 2; |
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483 | } |
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484 | } |
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485 | |
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486 | |
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487 | // Step 2 - search tags corresponding to the query $q ======================== |
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488 | $transliterated_tokens = array(); |
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489 | $token_tags = array(); |
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490 | foreach ($tokens as $token) |
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491 | { |
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492 | $transliterated_tokens[] = transliterate($token); |
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493 | $token_tags[] = array(); |
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494 | } |
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495 | |
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496 | // Step 2.1 - find match tags for every token in the query search |
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497 | $all_tags = array(); |
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498 | $query = ' |
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499 | SELECT id, name, url_name, COUNT(image_id) AS nb_images |
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500 | FROM '.TAGS_TABLE.' |
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501 | INNER JOIN '.IMAGE_TAG_TABLE.' ON id=tag_id |
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502 | GROUP BY id'; |
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503 | $result = pwg_query($query); |
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504 | while ($tag = pwg_db_fetch_assoc($result)) |
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505 | { |
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506 | $transliterated_tag = transliterate($tag['name']); |
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507 | |
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508 | // find how this tag matches query tokens |
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509 | for ($i=0; $i<count($tokens); $i++) |
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510 | { |
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511 | if (strstr($token_modifiers[$i], '-')!==false) |
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512 | continue;// ignore this NOT token |
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513 | $transliterated_token = $transliterated_tokens[$i]; |
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514 | |
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515 | $match = false; |
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516 | $pos = 0; |
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517 | while ( ($pos = strpos($transliterated_tag, $transliterated_token, $pos)) !== false) |
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518 | { |
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519 | if (strstr($token_modifiers[$i], '*')!==false) |
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520 | {// wildcard in this token |
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521 | $match = 1; |
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522 | break; |
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523 | } |
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524 | $token_len = strlen($transliterated_token); |
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525 | |
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526 | $word_begin = $pos; |
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527 | while ($word_begin>0) |
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528 | { |
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529 | if (! is_word_char($transliterated_tag[$word_begin-1]) ) |
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530 | break; |
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531 | $word_begin--; |
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532 | } |
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533 | |
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534 | $word_end = $pos + $token_len; |
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535 | while ($word_end<strlen($transliterated_tag) && is_word_char($transliterated_tag[$word_end]) ) |
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536 | $word_end++; |
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537 | |
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538 | $this_score = $token_len / ($word_end-$word_begin); |
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539 | if ($token_len <= 2) |
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540 | {// search for 1 or 2 characters must match exactly to avoid retrieving too much data |
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541 | if ($token_len != $word_end-$word_begin) |
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542 | $this_score = 0; |
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543 | } |
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544 | elseif ($token_len == 3) |
---|
545 | { |
---|
546 | if ($word_end-$word_begin > 4) |
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547 | $this_score = 0; |
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548 | } |
---|
549 | |
---|
550 | if ($this_score>0) |
---|
551 | $match = max($match, $this_score ); |
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552 | $pos++; |
---|
553 | } |
---|
554 | |
---|
555 | if ($match) |
---|
556 | { |
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557 | $tag_id = (int)$tag['id']; |
---|
558 | $all_tags[$tag_id] = $tag; |
---|
559 | $token_tags[$i][] = array('tag_id'=>$tag_id, 'score'=>$match); |
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560 | } |
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561 | } |
---|
562 | } |
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563 | $search_results['qs']['matching_tags']=$all_tags; |
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564 | |
---|
565 | // Step 2.2 - reduce matching tags for every token in the query search |
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566 | $score_cmp_fn = create_function('$a,$b', 'return 100*($b["score"]-$a["score"]);'); |
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567 | foreach ($token_tags as &$tt) |
---|
568 | { |
---|
569 | usort($tt, $score_cmp_fn); |
---|
570 | $nb_images = 0; |
---|
571 | $prev_score = 0; |
---|
572 | for ($j=0; $j<count($tt); $j++) |
---|
573 | { |
---|
574 | if ($nb_images > 200 && $prev_score > $tt[$j]['score'] ) |
---|
575 | {// "many" images in previous tags and starting from this tag is less relevent |
---|
576 | $tt = array_slice( $tt, 0, $j); |
---|
577 | break; |
---|
578 | } |
---|
579 | $nb_images += $all_tags[ $tt[$j]['tag_id'] ]['nb_images']; |
---|
580 | $prev_score = $tt[$j]['score']; |
---|
581 | } |
---|
582 | } |
---|
583 | |
---|
584 | // Step 2.3 - get the images for tags |
---|
585 | for ($i=0; $i<count($token_tags); $i++) |
---|
586 | { |
---|
587 | $tag_ids = array(); |
---|
588 | foreach($token_tags[$i] as $arr) |
---|
589 | $tag_ids[] = $arr['tag_id']; |
---|
590 | |
---|
591 | if (!empty($tag_ids)) |
---|
592 | { |
---|
593 | $query = ' |
---|
594 | SELECT image_id |
---|
595 | FROM '.IMAGE_TAG_TABLE.' |
---|
596 | WHERE tag_id IN ('.implode(',',$tag_ids).') |
---|
597 | GROUP BY image_id'; |
---|
598 | $result = pwg_query($query); |
---|
599 | while ($row = pwg_db_fetch_assoc($result)) |
---|
600 | { // weight is important when sorting images by relevance |
---|
601 | $image_id=(int)$row['image_id']; |
---|
602 | @$by_weights[$image_id] += 1; |
---|
603 | } |
---|
604 | } |
---|
605 | } |
---|
606 | |
---|
607 | // Step 3 - search categories corresponding to the query $q ================== |
---|
608 | $query = ' |
---|
609 | SELECT id, name, permalink, nb_images |
---|
610 | FROM '.CATEGORIES_TABLE.' |
---|
611 | INNER JOIN '.USER_CACHE_CATEGORIES_TABLE.' ON id=cat_id |
---|
612 | WHERE user_id='.$user['id'].' |
---|
613 | AND MATCH(name, comment) AGAINST( \''.$q.'\' IN BOOLEAN MODE)'. |
---|
614 | get_sql_condition_FandF ( |
---|
615 | array( 'visible_categories' => 'cat_id' ), "\n AND" |
---|
616 | ); |
---|
617 | $result = pwg_query($query); |
---|
618 | while ($row = pwg_db_fetch_assoc($result)) |
---|
619 | { // weight is important when sorting images by relevance |
---|
620 | if ($row['nb_images']==0) |
---|
621 | { |
---|
622 | $search_results['qs']['matching_cats_no_images'][] = $row; |
---|
623 | } |
---|
624 | else |
---|
625 | { |
---|
626 | $search_results['qs']['matching_cats'][$row['id']] = $row; |
---|
627 | } |
---|
628 | } |
---|
629 | |
---|
630 | if ( empty($by_weights) and empty($search_results['qs']['matching_cats']) ) |
---|
631 | { |
---|
632 | return $search_results; |
---|
633 | } |
---|
634 | |
---|
635 | // Step 4 - now we have $by_weights ( array image id => weight ) that need |
---|
636 | // permission checks and/or matching categories to get images from |
---|
637 | $where_clauses = array(); |
---|
638 | if ( !empty($by_weights) ) |
---|
639 | { |
---|
640 | $where_clauses[]='i.id IN (' |
---|
641 | . implode(',', array_keys($by_weights)) . ')'; |
---|
642 | } |
---|
643 | if ( !empty($search_results['qs']['matching_cats']) ) |
---|
644 | { |
---|
645 | $where_clauses[]='category_id IN ('. |
---|
646 | implode(',',array_keys($search_results['qs']['matching_cats'])).')'; |
---|
647 | } |
---|
648 | $where_clauses = array( '('.implode("\n OR ",$where_clauses).')' ); |
---|
649 | if (!empty($images_where)) |
---|
650 | { |
---|
651 | $where_clauses[]='('.$images_where.')'; |
---|
652 | } |
---|
653 | $where_clauses[] = get_sql_condition_FandF( |
---|
654 | array |
---|
655 | ( |
---|
656 | 'forbidden_categories' => 'category_id', |
---|
657 | 'visible_categories' => 'category_id', |
---|
658 | 'visible_images' => 'i.id' |
---|
659 | ), |
---|
660 | null,true |
---|
661 | ); |
---|
662 | |
---|
663 | $query = ' |
---|
664 | SELECT DISTINCT(id) |
---|
665 | FROM '.IMAGES_TABLE.' i |
---|
666 | INNER JOIN '.IMAGE_CATEGORY_TABLE.' AS ic ON id = ic.image_id |
---|
667 | WHERE '.implode("\n AND ", $where_clauses)."\n". |
---|
668 | $conf['order_by']; |
---|
669 | |
---|
670 | $allowed_images = array_from_query( $query, 'id'); |
---|
671 | |
---|
672 | if ( $super_order_by or empty($by_weights) ) |
---|
673 | { |
---|
674 | $search_results['items'] = $allowed_images; |
---|
675 | return $search_results; |
---|
676 | } |
---|
677 | |
---|
678 | $allowed_images = array_flip( $allowed_images ); |
---|
679 | $divisor = 5.0 * count($allowed_images); |
---|
680 | foreach ($allowed_images as $id=>$rank ) |
---|
681 | { |
---|
682 | $weight = isset($by_weights[$id]) ? $by_weights[$id] : 1; |
---|
683 | $weight -= $rank/$divisor; |
---|
684 | $allowed_images[$id] = $weight; |
---|
685 | } |
---|
686 | arsort($allowed_images, SORT_NUMERIC); |
---|
687 | $search_results['items'] = array_keys($allowed_images); |
---|
688 | return $search_results; |
---|
689 | } |
---|
690 | |
---|
691 | /** |
---|
692 | * returns an array of 'items' corresponding to the search id |
---|
693 | * |
---|
694 | * @param int search id |
---|
695 | * @param string images_where optional aditional restriction on images table |
---|
696 | * @return array |
---|
697 | */ |
---|
698 | function get_search_results($search_id, $super_order_by, $images_where='') |
---|
699 | { |
---|
700 | $search = get_search_array($search_id); |
---|
701 | if ( !isset($search['q']) ) |
---|
702 | { |
---|
703 | $result['items'] = get_regular_search_results($search, $images_where); |
---|
704 | return $result; |
---|
705 | } |
---|
706 | else |
---|
707 | { |
---|
708 | return get_quick_search_results($search['q'], $super_order_by, $images_where); |
---|
709 | } |
---|
710 | } |
---|
711 | ?> |
---|