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) 2008-2013 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 | * @package functions\search |
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26 | */ |
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27 | |
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28 | |
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29 | /** |
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30 | * Returns search rules stored into a serialized array in "search" |
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31 | * table. Each search rules set is numericaly identified. |
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32 | * |
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33 | * @param int $search_id |
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34 | * @return array |
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35 | */ |
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36 | function get_search_array($search_id) |
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37 | { |
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38 | if (!is_numeric($search_id)) |
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39 | { |
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40 | die('Search id must be an integer'); |
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41 | } |
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42 | |
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43 | $query = ' |
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44 | SELECT rules |
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45 | FROM '.SEARCH_TABLE.' |
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46 | WHERE id = '.$search_id.' |
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47 | ;'; |
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48 | list($serialized_rules) = pwg_db_fetch_row(pwg_query($query)); |
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49 | |
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50 | return unserialize($serialized_rules); |
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51 | } |
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52 | |
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53 | /** |
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54 | * Returns the SQL clause for a search. |
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55 | * Transforms the array returned by get_search_array() into SQL sub-query. |
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56 | * |
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57 | * @param array $search |
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58 | * @return string |
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59 | */ |
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60 | function get_sql_search_clause($search) |
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61 | { |
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62 | // SQL where clauses are stored in $clauses array during query |
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63 | // construction |
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64 | $clauses = array(); |
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65 | |
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66 | foreach (array('file','name','comment','author') as $textfield) |
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67 | { |
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68 | if (isset($search['fields'][$textfield])) |
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69 | { |
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70 | $local_clauses = array(); |
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71 | foreach ($search['fields'][$textfield]['words'] as $word) |
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72 | { |
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73 | $local_clauses[] = $textfield." LIKE '%".$word."%'"; |
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74 | } |
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75 | |
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76 | // adds brackets around where clauses |
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77 | $local_clauses = prepend_append_array_items($local_clauses, '(', ')'); |
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78 | |
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79 | $clauses[] = implode( |
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80 | ' '.$search['fields'][$textfield]['mode'].' ', |
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81 | $local_clauses |
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82 | ); |
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83 | } |
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84 | } |
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85 | |
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86 | if (isset($search['fields']['allwords'])) |
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87 | { |
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88 | $fields = array('file', 'name', 'comment', 'author'); |
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89 | // in the OR mode, request bust be : |
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90 | // ((field1 LIKE '%word1%' OR field2 LIKE '%word1%') |
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91 | // OR (field1 LIKE '%word2%' OR field2 LIKE '%word2%')) |
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92 | // |
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93 | // in the AND mode : |
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94 | // ((field1 LIKE '%word1%' OR field2 LIKE '%word1%') |
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95 | // AND (field1 LIKE '%word2%' OR field2 LIKE '%word2%')) |
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96 | $word_clauses = array(); |
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97 | foreach ($search['fields']['allwords']['words'] as $word) |
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98 | { |
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99 | $field_clauses = array(); |
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100 | foreach ($fields as $field) |
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101 | { |
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102 | $field_clauses[] = $field." LIKE '%".$word."%'"; |
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103 | } |
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104 | // adds brackets around where clauses |
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105 | $word_clauses[] = implode( |
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106 | "\n OR ", |
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107 | $field_clauses |
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108 | ); |
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109 | } |
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110 | |
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111 | array_walk( |
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112 | $word_clauses, |
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113 | create_function('&$s','$s="(".$s.")";') |
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114 | ); |
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115 | |
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116 | $clauses[] = "\n ". |
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117 | implode( |
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118 | "\n ". $search['fields']['allwords']['mode']. "\n ", |
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119 | $word_clauses |
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120 | ); |
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121 | } |
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122 | |
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123 | foreach (array('date_available', 'date_creation') as $datefield) |
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124 | { |
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125 | if (isset($search['fields'][$datefield])) |
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126 | { |
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127 | $clauses[] = $datefield." = '".$search['fields'][$datefield]['date']."'"; |
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128 | } |
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129 | |
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130 | foreach (array('after','before') as $suffix) |
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131 | { |
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132 | $key = $datefield.'-'.$suffix; |
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133 | |
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134 | if (isset($search['fields'][$key])) |
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135 | { |
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136 | $clauses[] = $datefield. |
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137 | ($suffix == 'after' ? ' >' : ' <'). |
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138 | ($search['fields'][$key]['inc'] ? '=' : ''). |
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139 | " '".$search['fields'][$key]['date']."'"; |
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140 | } |
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141 | } |
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142 | } |
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143 | |
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144 | if (isset($search['fields']['cat'])) |
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145 | { |
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146 | if ($search['fields']['cat']['sub_inc']) |
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147 | { |
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148 | // searching all the categories id of sub-categories |
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149 | $cat_ids = get_subcat_ids($search['fields']['cat']['words']); |
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150 | } |
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151 | else |
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152 | { |
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153 | $cat_ids = $search['fields']['cat']['words']; |
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154 | } |
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155 | |
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156 | $local_clause = 'category_id IN ('.implode(',', $cat_ids).')'; |
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157 | $clauses[] = $local_clause; |
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158 | } |
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159 | |
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160 | // adds brackets around where clauses |
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161 | $clauses = prepend_append_array_items($clauses, '(', ')'); |
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162 | |
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163 | $where_separator = |
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164 | implode( |
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165 | "\n ".$search['mode'].' ', |
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166 | $clauses |
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167 | ); |
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168 | |
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169 | $search_clause = $where_separator; |
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170 | |
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171 | return $search_clause; |
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172 | } |
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173 | |
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174 | /** |
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175 | * Returns the list of items corresponding to the advanced search array. |
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176 | * |
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177 | * @param array $search |
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178 | * @param string $images_where optional additional restriction on images table |
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179 | * @return array |
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180 | */ |
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181 | function get_regular_search_results($search, $images_where='') |
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182 | { |
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183 | global $conf; |
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184 | $forbidden = get_sql_condition_FandF( |
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185 | array |
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186 | ( |
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187 | 'forbidden_categories' => 'category_id', |
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188 | 'visible_categories' => 'category_id', |
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189 | 'visible_images' => 'id' |
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190 | ), |
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191 | "\n AND" |
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192 | ); |
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193 | |
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194 | $items = array(); |
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195 | $tag_items = array(); |
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196 | |
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197 | if (isset($search['fields']['tags'])) |
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198 | { |
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199 | $tag_items = get_image_ids_for_tags( |
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200 | $search['fields']['tags']['words'], |
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201 | $search['fields']['tags']['mode'] |
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202 | ); |
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203 | } |
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204 | |
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205 | $search_clause = get_sql_search_clause($search); |
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206 | |
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207 | if (!empty($search_clause)) |
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208 | { |
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209 | $query = ' |
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210 | SELECT DISTINCT(id) |
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211 | FROM '.IMAGES_TABLE.' i |
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212 | INNER JOIN '.IMAGE_CATEGORY_TABLE.' AS ic ON id = ic.image_id |
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213 | WHERE '.$search_clause; |
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214 | if (!empty($images_where)) |
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215 | { |
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216 | $query .= "\n AND ".$images_where; |
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217 | } |
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218 | $query .= $forbidden.' |
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219 | '.$conf['order_by']; |
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220 | $items = array_from_query($query, 'id'); |
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221 | } |
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222 | |
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223 | if ( !empty($tag_items) ) |
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224 | { |
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225 | switch ($search['mode']) |
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226 | { |
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227 | case 'AND': |
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228 | if (empty($search_clause)) |
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229 | { |
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230 | $items = $tag_items; |
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231 | } |
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232 | else |
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233 | { |
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234 | $items = array_values( array_intersect($items, $tag_items) ); |
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235 | } |
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236 | break; |
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237 | case 'OR': |
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238 | $before_count = count($items); |
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239 | $items = array_unique( |
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240 | array_merge( |
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241 | $items, |
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242 | $tag_items |
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243 | ) |
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244 | ); |
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245 | break; |
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246 | } |
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247 | } |
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248 | |
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249 | return $items; |
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250 | } |
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251 | |
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252 | /** |
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253 | * Finds if a char is a letter, a figure or any char of the extended ASCII table (>127). |
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254 | * |
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255 | * @param char $ch |
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256 | * @return bool |
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257 | */ |
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258 | function is_word_char($ch) |
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259 | { |
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260 | return ($ch>='0' && $ch<='9') || ($ch>='a' && $ch<='z') || ($ch>='A' && $ch<='Z') || ord($ch)>127; |
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261 | } |
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262 | |
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263 | /** |
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264 | * Finds if a char is a special token for word start: [{<=*+ |
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265 | * |
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266 | * @param char $ch |
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267 | * @return bool |
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268 | */ |
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269 | function is_odd_wbreak_begin($ch) |
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270 | { |
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271 | return strpos('[{<=*+', $ch)===false ? false:true; |
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272 | } |
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273 | |
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274 | /** |
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275 | * Finds if a char is a special token for word end: ]}>=*+ |
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276 | * |
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277 | * @param char $ch |
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278 | * @return bool |
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279 | */ |
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280 | function is_odd_wbreak_end($ch) |
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281 | { |
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282 | return strpos(']}>=*+', $ch)===false ? false:true; |
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283 | } |
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284 | |
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285 | |
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286 | define('QST_QUOTED', 0x01); |
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287 | define('QST_NOT', 0x02); |
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288 | define('QST_WILDCARD_BEGIN', 0x04); |
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289 | define('QST_WILDCARD_END', 0x08); |
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290 | define('QST_WILDCARD', QST_WILDCARD_BEGIN|QST_WILDCARD_END); |
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291 | |
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292 | /** |
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293 | * Analyzes and splits the quick/query search query $q into tokens. |
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294 | * q='john bill' => 2 tokens 'john' 'bill' |
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295 | * Special characters for MySql full text search (+,<,>,~) appear in the token modifiers. |
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296 | * The query can contain a phrase: 'Pierre "New York"' will return 'pierre' qnd 'new york'. |
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297 | * |
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298 | * @param string $q |
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299 | * @param array &$qtokens |
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300 | * @param array &$qtoken_modifiers |
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301 | */ |
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302 | function analyse_qsearch($q, &$qtokens, &$qtoken_modifiers) |
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303 | { |
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304 | $q = stripslashes($q); |
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305 | $tokens = array(); |
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306 | $token_modifiers = array(); |
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307 | $crt_token = ""; |
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308 | $crt_token_modifier = 0; |
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309 | |
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310 | for ($i=0; $i<strlen($q); $i++) |
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311 | { |
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312 | $ch = $q[$i]; |
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313 | if ( ($crt_token_modifier&QST_QUOTED)==0) |
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314 | { |
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315 | if ($ch=='"') |
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316 | { |
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317 | if (strlen($crt_token)) |
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318 | { |
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319 | $tokens[] = $crt_token; $token_modifiers[] = $crt_token_modifier; |
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320 | $crt_token = ""; $crt_token_modifier = 0; |
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321 | } |
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322 | $crt_token_modifier |= QST_QUOTED; |
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323 | } |
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324 | elseif ( strcspn($ch, '*+-><~')==0 ) |
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325 | { //special full text modifier |
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326 | if (strlen($crt_token)) |
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327 | { |
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328 | $crt_token .= $ch; |
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329 | } |
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330 | else |
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331 | { |
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332 | if ( $ch=='*' ) |
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333 | $crt_token_modifier |= QST_WILDCARD_BEGIN; |
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334 | if ( $ch=='-' ) |
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335 | $crt_token_modifier |= QST_NOT; |
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336 | } |
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337 | } |
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338 | elseif (preg_match('/[\s,.;!\?]+/', $ch)) |
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339 | { // white space |
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340 | if (strlen($crt_token)) |
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341 | { |
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342 | $tokens[] = $crt_token; $token_modifiers[] = $crt_token_modifier; |
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343 | $crt_token = ""; |
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344 | } |
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345 | $crt_token_modifier = 0; |
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346 | } |
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347 | else |
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348 | { |
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349 | $crt_token .= $ch; |
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350 | } |
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351 | } |
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352 | else // qualified with quotes |
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353 | { |
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354 | if ($ch=='"') |
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355 | { |
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356 | if ($i+1 < strlen($q) && $q[$i+1]=='*') |
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357 | { |
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358 | $crt_token_modifier |= QST_WILDCARD_END; |
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359 | $i++; |
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360 | } |
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361 | $tokens[] = $crt_token; $token_modifiers[] = $crt_token_modifier; |
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362 | $crt_token = ""; $crt_token_modifier = 0; |
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363 | $state=0; |
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364 | } |
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365 | else |
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366 | $crt_token .= $ch; |
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367 | } |
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368 | } |
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369 | |
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370 | if (strlen($crt_token)) |
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371 | { |
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372 | $tokens[] = $crt_token; |
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373 | $token_modifiers[] = $crt_token_modifier; |
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374 | } |
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375 | |
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376 | $qtokens = array(); |
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377 | $qtoken_modifiers = array(); |
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378 | for ($i=0; $i<count($tokens); $i++) |
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379 | { |
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380 | if ( !($token_modifiers[$i] & QST_QUOTED) ) |
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381 | { |
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382 | if ( substr($tokens[$i], -1)=='*' ) |
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383 | { |
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384 | $tokens[$i] = rtrim($tokens[$i], '*'); |
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385 | $token_modifiers[$i] |= QST_WILDCARD_END; |
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386 | } |
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387 | } |
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388 | if ( strlen($tokens[$i])==0) |
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389 | continue; |
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390 | $qtokens[] = $tokens[$i]; |
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391 | $qtoken_modifiers[] = $token_modifiers[$i]; |
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392 | } |
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393 | } |
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394 | |
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395 | /** |
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396 | * Returns the LIKE SQL clause corresponding to the quick search query |
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397 | * that has been split into tokens. |
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398 | * for example file LIKE '%john%' OR file LIKE '%bill%'. |
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399 | * |
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400 | * @param array $tokens |
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401 | * @param array $token_modifiers |
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402 | * @param string $field |
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403 | * @return string|null |
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404 | */ |
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405 | function get_qsearch_like_clause($tokens, $token_modifiers, $field) |
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406 | { |
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407 | $clauses = array(); |
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408 | for ($i=0; $i<count($tokens); $i++) |
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409 | { |
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410 | $token = trim($tokens[$i], '%'); |
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411 | if ($token_modifiers[$i]&QST_NOT) |
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412 | continue; |
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413 | if ( strlen($token)==0 ) |
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414 | continue; |
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415 | $token = addslashes($token); |
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416 | $token = str_replace( array('%','_'), array('\\%','\\_'), $token); // escape LIKE specials %_ |
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417 | $clauses[] = $field.' LIKE \'%'.$token.'%\''; |
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418 | } |
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419 | |
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420 | return count($clauses) ? '('.implode(' OR ', $clauses).')' : null; |
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421 | } |
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422 | |
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423 | /** |
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424 | * Returns tags corresponding to the quick search query that has been split into tokens. |
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425 | * |
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426 | * @param array $tokens |
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427 | * @param array $token_modifiers |
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428 | * @param array &$token_tag_ids |
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429 | * @param array &$not_tag_ids |
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430 | * @param array &$all_tags |
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431 | */ |
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432 | function get_qsearch_tags($tokens, $token_modifiers, &$token_tag_ids, &$not_tag_ids, &$all_tags) |
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433 | { |
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434 | $token_tag_ids = array_fill(0, count($tokens), array() ); |
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435 | $not_tag_ids = $all_tags = array(); |
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436 | |
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437 | $token_tag_scores = $token_tag_ids; |
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438 | $transliterated_tokens = array(); |
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439 | foreach ($tokens as $token) |
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440 | { |
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441 | $transliterated_tokens[] = transliterate($token); |
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442 | } |
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443 | |
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444 | $query = ' |
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445 | SELECT t.*, COUNT(image_id) AS counter |
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446 | FROM '.TAGS_TABLE.' t |
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447 | INNER JOIN '.IMAGE_TAG_TABLE.' ON id=tag_id |
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448 | GROUP BY id'; |
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449 | $result = pwg_query($query); |
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450 | while ($tag = pwg_db_fetch_assoc($result)) |
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451 | { |
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452 | $transliterated_tag = transliterate($tag['name']); |
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453 | |
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454 | // find how this tag matches query tokens |
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455 | for ($i=0; $i<count($tokens); $i++) |
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456 | { |
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457 | $transliterated_token = $transliterated_tokens[$i]; |
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458 | |
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459 | $match = false; |
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460 | $pos = 0; |
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461 | while ( ($pos = strpos($transliterated_tag, $transliterated_token, $pos)) !== false) |
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462 | { |
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463 | if ( ($token_modifiers[$i]&QST_WILDCARD)==QST_WILDCARD ) |
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464 | {// wildcard in this token |
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465 | $match = 1; |
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466 | break; |
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467 | } |
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468 | $token_len = strlen($transliterated_token); |
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469 | |
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470 | // search begin of word |
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471 | $wbegin_len=0; $wbegin_char=' '; |
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472 | while ($pos-$wbegin_len > 0) |
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473 | { |
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474 | if (! is_word_char($transliterated_tag[$pos-$wbegin_len-1]) ) |
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475 | { |
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476 | $wbegin_char = $transliterated_tag[$pos-$wbegin_len-1]; |
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477 | break; |
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478 | } |
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479 | $wbegin_len++; |
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480 | } |
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481 | |
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482 | // search end of word |
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483 | $wend_len=0; $wend_char=' '; |
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484 | while ($pos+$token_len+$wend_len < strlen($transliterated_tag)) |
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485 | { |
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486 | if (! is_word_char($transliterated_tag[$pos+$token_len+$wend_len]) ) |
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487 | { |
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488 | $wend_char = $transliterated_tag[$pos+$token_len+$wend_len]; |
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489 | break; |
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490 | } |
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491 | $wend_len++; |
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492 | } |
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493 | |
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494 | $this_score = 0; |
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495 | if ( ($token_modifiers[$i]&QST_WILDCARD)==0 ) |
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496 | {// no wildcard begin or end |
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497 | if ($token_len <= 2) |
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498 | {// search for 1 or 2 characters must match exactly to avoid retrieving too much data |
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499 | if ($wbegin_len==0 && $wend_len==0 && !is_odd_wbreak_begin($wbegin_char) && !is_odd_wbreak_end($wend_char) ) |
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500 | $this_score = 1; |
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501 | } |
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502 | elseif ($token_len == 3) |
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503 | { |
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504 | if ($wbegin_len==0) |
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505 | $this_score = $token_len / ($token_len + $wend_len); |
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506 | } |
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507 | else |
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508 | { |
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509 | $this_score = $token_len / ($token_len + 1.1 * $wbegin_len + 0.9 * $wend_len); |
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510 | } |
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511 | } |
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512 | |
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513 | if ($this_score>0) |
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514 | $match = max($match, $this_score ); |
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515 | $pos++; |
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516 | } |
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517 | |
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518 | if ($match) |
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519 | { |
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520 | $tag_id = (int)$tag['id']; |
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521 | $all_tags[$tag_id] = $tag; |
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522 | $token_tag_ids[$i][] = $tag_id; |
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523 | $token_tag_scores[$i][] = $match; |
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524 | } |
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525 | } |
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526 | } |
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527 | |
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528 | // process not tags |
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529 | for ($i=0; $i<count($tokens); $i++) |
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530 | { |
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531 | if ( ! ($token_modifiers[$i]&QST_NOT) ) |
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532 | continue; |
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533 | |
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534 | array_multisort($token_tag_scores[$i], SORT_DESC|SORT_NUMERIC, $token_tag_ids[$i]); |
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535 | |
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536 | for ($j=0; $j<count($token_tag_scores[$i]); $j++) |
---|
537 | { |
---|
538 | if ($token_tag_scores[$i][$j] < 0.8) |
---|
539 | break; |
---|
540 | if ($j>0 && $token_tag_scores[$i][$j] < $token_tag_scores[$i][0]) |
---|
541 | break; |
---|
542 | $tag_id = $token_tag_ids[$i][$j]; |
---|
543 | if ( isset($all_tags[$tag_id]) ) |
---|
544 | { |
---|
545 | unset($all_tags[$tag_id]); |
---|
546 | $not_tag_ids[] = $tag_id; |
---|
547 | } |
---|
548 | } |
---|
549 | $token_tag_ids[$i] = array(); |
---|
550 | } |
---|
551 | |
---|
552 | // process regular tags |
---|
553 | for ($i=0; $i<count($tokens); $i++) |
---|
554 | { |
---|
555 | if ( $token_modifiers[$i]&QST_NOT ) |
---|
556 | continue; |
---|
557 | |
---|
558 | array_multisort($token_tag_scores[$i], SORT_DESC|SORT_NUMERIC, $token_tag_ids[$i]); |
---|
559 | |
---|
560 | $counter = 0; |
---|
561 | for ($j=0; $j<count($token_tag_scores[$i]); $j++) |
---|
562 | { |
---|
563 | $tag_id = $token_tag_ids[$i][$j]; |
---|
564 | if ( ! isset($all_tags[$tag_id]) ) |
---|
565 | { |
---|
566 | array_splice($token_tag_ids[$i], $j, 1); |
---|
567 | array_splice($token_tag_scores[$i], $j, 1); |
---|
568 | $j--; |
---|
569 | continue; |
---|
570 | } |
---|
571 | |
---|
572 | $counter += $all_tags[$tag_id]['counter']; |
---|
573 | if ($counter > 200 && $j>0 && $token_tag_scores[$i][0] > $token_tag_scores[$i][$j] ) |
---|
574 | {// "many" images in previous tags and starting from this tag is less relevent |
---|
575 | array_splice($token_tag_ids[$i], $j); |
---|
576 | array_splice($token_tag_scores[$i], $j); |
---|
577 | break; |
---|
578 | } |
---|
579 | } |
---|
580 | } |
---|
581 | |
---|
582 | usort($all_tags, 'tag_alpha_compare'); |
---|
583 | foreach ( $all_tags as &$tag ) |
---|
584 | { |
---|
585 | $tag['name'] = trigger_event('render_tag_name', $tag['name']); |
---|
586 | } |
---|
587 | } |
---|
588 | |
---|
589 | /** |
---|
590 | * Returns the search results corresponding to a quick/query search. |
---|
591 | * A quick/query search returns many items (search is not strict), but results |
---|
592 | * are sorted by relevance unless $super_order_by is true. Returns: |
---|
593 | * array ( |
---|
594 | * 'items' => array of matching images |
---|
595 | * 'qs' => array( |
---|
596 | * 'matching_tags' => array of matching tags |
---|
597 | * 'matching_cats' => array of matching categories |
---|
598 | * 'matching_cats_no_images' =>array(99) - matching categories without images |
---|
599 | * ) |
---|
600 | * ) |
---|
601 | * |
---|
602 | * @param string $q |
---|
603 | * @param bool $super_order_by |
---|
604 | * @param string $images_where optional additional restriction on images table |
---|
605 | * @return array |
---|
606 | */ |
---|
607 | function get_quick_search_results($q, $super_order_by, $images_where='') |
---|
608 | { |
---|
609 | global $user, $conf; |
---|
610 | |
---|
611 | $search_results = |
---|
612 | array( |
---|
613 | 'items' => array(), |
---|
614 | 'qs' => array('q'=>stripslashes($q)), |
---|
615 | ); |
---|
616 | $q = trim($q); |
---|
617 | analyse_qsearch($q, $tokens, $token_modifiers); |
---|
618 | if (count($tokens)==0) |
---|
619 | { |
---|
620 | return $search_results; |
---|
621 | } |
---|
622 | $debug[] = '<!--'.count($tokens).' tokens'; |
---|
623 | |
---|
624 | $q_like_field = '@@__db_field__@@'; //something never in a search |
---|
625 | $q_like_clause = get_qsearch_like_clause($tokens, $token_modifiers, $q_like_field ); |
---|
626 | |
---|
627 | // Step 1 - first we find matches in #images table =========================== |
---|
628 | $where_clauses='MATCH(i.name, i.comment) AGAINST( \''.$q.'\' IN BOOLEAN MODE)'; |
---|
629 | if (!empty($q_like_clause)) |
---|
630 | { |
---|
631 | $where_clauses .= ' |
---|
632 | OR '. str_replace($q_like_field, 'CONVERT(file, CHAR)', $q_like_clause); |
---|
633 | $where_clauses = '('.$where_clauses.')'; |
---|
634 | } |
---|
635 | $where_clauses = array($where_clauses); |
---|
636 | if (!empty($images_where)) |
---|
637 | { |
---|
638 | $where_clauses[]='('.$images_where.')'; |
---|
639 | } |
---|
640 | $where_clauses[] .= get_sql_condition_FandF |
---|
641 | ( |
---|
642 | array( 'visible_images' => 'i.id' ), null, true |
---|
643 | ); |
---|
644 | $query = ' |
---|
645 | SELECT i.id, |
---|
646 | MATCH(i.name, i.comment) AGAINST( \''.$q.'\' IN BOOLEAN MODE) AS weight |
---|
647 | FROM '.IMAGES_TABLE.' i |
---|
648 | WHERE '.implode("\n AND ", $where_clauses); |
---|
649 | |
---|
650 | $by_weights=array(); |
---|
651 | $result = pwg_query($query); |
---|
652 | while ($row = pwg_db_fetch_assoc($result)) |
---|
653 | { // weight is important when sorting images by relevance |
---|
654 | if ($row['weight']) |
---|
655 | { |
---|
656 | $by_weights[(int)$row['id']] = 2*$row['weight']; |
---|
657 | } |
---|
658 | else |
---|
659 | {//full text does not match but file name match |
---|
660 | $by_weights[(int)$row['id']] = 2; |
---|
661 | } |
---|
662 | } |
---|
663 | $debug[] = count($by_weights).' fulltext'; |
---|
664 | if (!empty($by_weights)) |
---|
665 | { |
---|
666 | $debug[] = 'ft score min:'.min($by_weights).' max:'.max($by_weights); |
---|
667 | } |
---|
668 | |
---|
669 | |
---|
670 | // Step 2 - get the tags and the images for tags |
---|
671 | get_qsearch_tags($tokens, $token_modifiers, $token_tag_ids, $not_tag_ids, $search_results['qs']['matching_tags']); |
---|
672 | $debug[] = count($search_results['qs']['matching_tags']).' tags'; |
---|
673 | |
---|
674 | for ($i=0; $i<count($token_tag_ids); $i++) |
---|
675 | { |
---|
676 | $tag_ids = $token_tag_ids[$i]; |
---|
677 | $debug[] = count($tag_ids).' unique tags'; |
---|
678 | |
---|
679 | if (!empty($tag_ids)) |
---|
680 | { |
---|
681 | $tag_photo_count=0; |
---|
682 | $query = ' |
---|
683 | SELECT image_id FROM '.IMAGE_TAG_TABLE.' |
---|
684 | WHERE tag_id IN ('.implode(',',$tag_ids).') |
---|
685 | GROUP BY image_id'; |
---|
686 | $result = pwg_query($query); |
---|
687 | while ($row = pwg_db_fetch_assoc($result)) |
---|
688 | { // weight is important when sorting images by relevance |
---|
689 | $image_id=(int)$row['image_id']; |
---|
690 | @$by_weights[$image_id] += 1; |
---|
691 | $tag_photo_count++; |
---|
692 | } |
---|
693 | $debug[] = $tag_photo_count.' photos for tag'; |
---|
694 | $debug[] = count($by_weights).' photos after'; |
---|
695 | } |
---|
696 | } |
---|
697 | |
---|
698 | // Step 3 - search categories corresponding to the query $q ================== |
---|
699 | $query = ' |
---|
700 | SELECT id, name, permalink, nb_images |
---|
701 | FROM '.CATEGORIES_TABLE.' |
---|
702 | INNER JOIN '.USER_CACHE_CATEGORIES_TABLE.' ON id=cat_id |
---|
703 | WHERE user_id='.$user['id'].' |
---|
704 | AND MATCH(name, comment) AGAINST( \''.$q.'\' IN BOOLEAN MODE)'. |
---|
705 | get_sql_condition_FandF ( |
---|
706 | array( 'visible_categories' => 'cat_id' ), "\n AND" |
---|
707 | ); |
---|
708 | $result = pwg_query($query); |
---|
709 | while ($row = pwg_db_fetch_assoc($result)) |
---|
710 | { // weight is important when sorting images by relevance |
---|
711 | if ($row['nb_images']==0) |
---|
712 | { |
---|
713 | $search_results['qs']['matching_cats_no_images'][] = $row; |
---|
714 | } |
---|
715 | else |
---|
716 | { |
---|
717 | $search_results['qs']['matching_cats'][$row['id']] = $row; |
---|
718 | } |
---|
719 | } |
---|
720 | $debug[] = count(@$search_results['qs']['matching_cats']).' albums with images'; |
---|
721 | |
---|
722 | if ( empty($by_weights) and empty($search_results['qs']['matching_cats']) ) |
---|
723 | { |
---|
724 | return $search_results; |
---|
725 | } |
---|
726 | |
---|
727 | if (!empty($not_tag_ids)) |
---|
728 | { |
---|
729 | $query = ' |
---|
730 | SELECT image_id FROM '.IMAGE_TAG_TABLE.' |
---|
731 | WHERE tag_id IN ('.implode(',',$not_tag_ids).') |
---|
732 | GROUP BY image_id'; |
---|
733 | $result = pwg_query($query); |
---|
734 | while ($row = pwg_db_fetch_row($result)) |
---|
735 | { |
---|
736 | $id = $row[0]; |
---|
737 | unset($by_weights[$id]); |
---|
738 | } |
---|
739 | $debug[] = count($by_weights).' after not tags'; |
---|
740 | } |
---|
741 | // Step 4 - now we have $by_weights ( array image id => weight ) that need |
---|
742 | // permission checks and/or matching categories to get images from |
---|
743 | $where_clauses = array(); |
---|
744 | if ( !empty($by_weights) ) |
---|
745 | { |
---|
746 | $where_clauses[]='i.id IN (' |
---|
747 | . implode(',', array_keys($by_weights)) . ')'; |
---|
748 | } |
---|
749 | if ( !empty($search_results['qs']['matching_cats']) ) |
---|
750 | { |
---|
751 | $where_clauses[]='category_id IN ('. |
---|
752 | implode(',',array_keys($search_results['qs']['matching_cats'])).')'; |
---|
753 | } |
---|
754 | $where_clauses = array( '('.implode("\n OR ",$where_clauses).')' ); |
---|
755 | if (!empty($images_where)) |
---|
756 | { |
---|
757 | $where_clauses[]='('.$images_where.')'; |
---|
758 | } |
---|
759 | $where_clauses[] = get_sql_condition_FandF( |
---|
760 | array |
---|
761 | ( |
---|
762 | 'forbidden_categories' => 'category_id', |
---|
763 | 'visible_categories' => 'category_id', |
---|
764 | 'visible_images' => 'i.id' |
---|
765 | ), |
---|
766 | null,true |
---|
767 | ); |
---|
768 | |
---|
769 | $query = ' |
---|
770 | SELECT DISTINCT(id) |
---|
771 | FROM '.IMAGES_TABLE.' i |
---|
772 | INNER JOIN '.IMAGE_CATEGORY_TABLE.' AS ic ON id = ic.image_id |
---|
773 | WHERE '.implode("\n AND ", $where_clauses)."\n". |
---|
774 | $conf['order_by']; |
---|
775 | |
---|
776 | $allowed_images = array_from_query( $query, 'id'); |
---|
777 | |
---|
778 | $debug[] = count($allowed_images).' final photo count -->'; |
---|
779 | global $template; |
---|
780 | $template->append('footer_elements', implode(', ', $debug) ); |
---|
781 | |
---|
782 | if ( $super_order_by or empty($by_weights) ) |
---|
783 | { |
---|
784 | $search_results['items'] = $allowed_images; |
---|
785 | return $search_results; |
---|
786 | } |
---|
787 | |
---|
788 | $allowed_images = array_flip( $allowed_images ); |
---|
789 | $divisor = 5.0 * count($allowed_images); |
---|
790 | foreach ($allowed_images as $id=> &$rank ) |
---|
791 | { |
---|
792 | $weight = isset($by_weights[$id]) ? $by_weights[$id] : 1; |
---|
793 | $weight -= $rank/$divisor; |
---|
794 | $rank = $weight; |
---|
795 | } |
---|
796 | unset($rank); |
---|
797 | |
---|
798 | arsort($allowed_images, SORT_NUMERIC); |
---|
799 | $search_results['items'] = array_keys($allowed_images); |
---|
800 | return $search_results; |
---|
801 | } |
---|
802 | |
---|
803 | /** |
---|
804 | * Returns an array of 'items' corresponding to the search id. |
---|
805 | * It can be either a quick search or a regular search. |
---|
806 | * |
---|
807 | * @param int $search_id |
---|
808 | * @param bool $super_order_by |
---|
809 | * @param string $images_where optional aditional restriction on images table |
---|
810 | * @return array |
---|
811 | */ |
---|
812 | function get_search_results($search_id, $super_order_by, $images_where='') |
---|
813 | { |
---|
814 | $search = get_search_array($search_id); |
---|
815 | if ( !isset($search['q']) ) |
---|
816 | { |
---|
817 | $result['items'] = get_regular_search_results($search, $images_where); |
---|
818 | return $result; |
---|
819 | } |
---|
820 | else |
---|
821 | { |
---|
822 | return get_quick_search_results($search['q'], $super_order_by, $images_where); |
---|
823 | } |
---|
824 | } |
---|
825 | |
---|
826 | ?> |
---|