1 | <?php |
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2 | /*************************************************************************** |
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3 | * functions.php * |
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4 | * ------------------- * |
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5 | * application : PhpWebGallery 1.3 <http://phpwebgallery.net> * |
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6 | * author : Pierrick LE GALL <pierrick@z0rglub.com> * |
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7 | * * |
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8 | * $Id: functions.php 167 2003-10-04 17:13:19Z z0rglub $ |
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9 | * * |
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10 | *************************************************************************** |
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11 | |
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12 | *************************************************************************** |
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13 | * * |
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14 | * This program is free software; you can redistribute it and/or modify * |
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15 | * it under the terms of the GNU General Public License as published by * |
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16 | * the Free Software Foundation; * |
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17 | * * |
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18 | ***************************************************************************/ |
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19 | |
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20 | $tab_ext_create_TN = array ( 'jpg', 'png', 'JPG', 'PNG' ); |
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21 | |
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22 | // is_image returns true if the given $filename (including the path) is a |
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23 | // picture according to its format and its extension. |
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24 | // As GD library can only generate pictures from jpeg and png files, if you |
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25 | // ask if the filename is an image for thumbnail creation (second parameter |
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26 | // set to true), the only authorized formats are jpeg and png. |
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27 | function is_image( $filename, $create_thumbnail = false ) |
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28 | { |
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29 | global $conf, $tab_ext_create_TN; |
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30 | |
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31 | if ( is_file( $filename ) ) |
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32 | { |
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33 | $size = getimagesize( $filename ); |
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34 | // $size[2] == 1 means GIF |
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35 | // $size[2] == 2 means JPG |
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36 | // $size[2] == 3 means PNG |
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37 | if ( !$create_thumbnail ) |
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38 | { |
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39 | if ( in_array( get_extension( $filename ), $conf['picture_ext'] ) |
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40 | and ( $size[2] == 1 or $size[2] == 2 or $size[2] == 3 ) ) |
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41 | { |
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42 | return true; |
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43 | } |
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44 | } |
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45 | else |
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46 | { |
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47 | if ( in_array( get_extension( $filename ), $tab_ext_create_TN ) |
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48 | and ( $size[2] == 2 or $size[2] == 3 ) ) |
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49 | { |
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50 | return true; |
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51 | } |
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52 | } |
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53 | } |
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54 | return false; |
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55 | } |
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56 | |
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57 | function TN_exists( $dir, $file ) |
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58 | { |
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59 | global $conf; |
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60 | |
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61 | $filename = get_filename_wo_extension( $file ); |
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62 | foreach ( $conf['picture_ext'] as $ext ) { |
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63 | $test = $dir.'/thumbnail/'.$conf['prefix_thumbnail'].$filename.'.'.$ext; |
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64 | if ( is_file ( $test ) ) |
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65 | { |
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66 | return $ext; |
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67 | } |
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68 | } |
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69 | return false; |
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70 | } |
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71 | |
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72 | // The function delete_site deletes a site |
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73 | // and call the function delete_category for each primary category of the site |
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74 | function delete_site( $id ) |
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75 | { |
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76 | // destruction of the categories of the site |
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77 | $query = 'SELECT id'; |
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78 | $query.= ' FROM '.PREFIX_TABLE.'categories'; |
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79 | $query.= ' WHERE site_id = '.$id; |
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80 | $query.= ';'; |
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81 | $result = mysql_query( $query ); |
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82 | while ( $row = mysql_fetch_array( $result ) ) |
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83 | { |
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84 | delete_category( $row['id'] ); |
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85 | } |
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86 | |
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87 | // destruction of the site |
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88 | $query = 'DELETE FROM '.PREFIX_TABLE.'sites'; |
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89 | $query.= ' WHERE id = '.$id; |
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90 | $query.= ';'; |
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91 | mysql_query( $query ); |
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92 | } |
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93 | |
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94 | // The function delete_category deletes the category identified by the $id |
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95 | // It also deletes (in the database) : |
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96 | // - all the images of the images (thanks to delete_image, see further) |
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97 | // - all the links between images and this category |
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98 | // - all the restrictions linked to the category |
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99 | // The function works recursively. |
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100 | function delete_category( $id ) |
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101 | { |
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102 | // destruction of all the related images |
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103 | $query = 'SELECT id'; |
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104 | $query.= ' FROM '.PREFIX_TABLE.'images'; |
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105 | $query.= ' WHERE storage_category_id = '.$id; |
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106 | $query.= ';'; |
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107 | $result = mysql_query( $query ); |
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108 | while ( $row = mysql_fetch_array( $result ) ) |
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109 | { |
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110 | delete_image( $row['id'] ); |
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111 | } |
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112 | |
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113 | // destruction of the links between images and this category |
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114 | $query = 'DELETE FROM '.PREFIX_TABLE.'image_category'; |
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115 | $query.= ' WHERE category_id = '.$id; |
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116 | $query.= ';'; |
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117 | mysql_query( $query ); |
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118 | |
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119 | // destruction of the access linked to the category |
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120 | $query = 'DELETE FROM '.PREFIX_TABLE.'user_access'; |
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121 | $query.= ' WHERE cat_id = '.$id; |
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122 | $query.= ';'; |
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123 | mysql_query( $query ); |
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124 | $query = 'DELETE FROM '.PREFIX_TABLE.'group_access'; |
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125 | $query.= ' WHERE cat_id = '.$id; |
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126 | $query.= ';'; |
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127 | mysql_query( $query ); |
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128 | |
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129 | // destruction of the sub-categories |
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130 | $query = 'SELECT id'; |
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131 | $query.= ' FROM '.PREFIX_TABLE.'categories'; |
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132 | $query.= ' WHERE id_uppercat = '.$id; |
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133 | $query.= ';'; |
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134 | $result = mysql_query( $query ); |
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135 | while( $row = mysql_fetch_array( $result ) ) |
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136 | { |
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137 | delete_category( $row['id'] ); |
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138 | } |
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139 | |
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140 | // destruction of the category |
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141 | $query = 'DELETE FROM '.PREFIX_TABLE.'categories'; |
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142 | $query.= ' WHERE id = '.$id; |
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143 | $query.= ';'; |
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144 | mysql_query( $query ); |
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145 | } |
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146 | |
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147 | // The function delete_image deletes the image identified by the $id |
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148 | // It also deletes (in the database) : |
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149 | // - all the comments related to the image |
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150 | // - all the links between categories and this image |
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151 | // - all the favorites associated to the image |
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152 | function delete_image( $id ) |
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153 | { |
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154 | global $count_deleted; |
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155 | |
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156 | // destruction of the comments on the image |
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157 | $query = 'DELETE FROM '.PREFIX_TABLE.'comments'; |
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158 | $query.= ' WHERE image_id = '.$id; |
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159 | $query.= ';'; |
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160 | mysql_query( $query ); |
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161 | |
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162 | // destruction of the links between images and this category |
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163 | $query = 'DELETE FROM '.PREFIX_TABLE.'image_category'; |
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164 | $query.= ' WHERE image_id = '.$id; |
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165 | $query.= ';'; |
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166 | mysql_query( $query ); |
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167 | |
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168 | // destruction of the favorites associated with the picture |
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169 | $query = 'DELETE FROM '.PREFIX_TABLE.'favorites'; |
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170 | $query.= ' WHERE image_id = '.$id; |
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171 | $query.= ';'; |
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172 | mysql_query( $query ); |
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173 | |
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174 | // destruction of the image |
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175 | $query = 'DELETE FROM '.PREFIX_TABLE.'images'; |
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176 | $query.= ' WHERE id = '.$id; |
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177 | $query.= ';'; |
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178 | mysql_query( $query ); |
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179 | $count_deleted++; |
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180 | } |
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181 | |
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182 | // The delete_user function delete a user identified by the $user_id |
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183 | // It also deletes : |
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184 | // - all the access linked to this user |
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185 | // - all the links to any group |
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186 | // - all the favorites linked to this user |
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187 | // - all sessions linked to this user |
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188 | function delete_user( $user_id ) |
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189 | { |
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190 | // destruction of the access linked to the user |
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191 | $query = 'DELETE FROM '.PREFIX_TABLE.'user_access'; |
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192 | $query.= ' WHERE user_id = '.$user_id; |
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193 | $query.= ';'; |
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194 | mysql_query( $query ); |
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195 | |
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196 | // destruction of the group links for this user |
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197 | $query = 'DELETE FROM '.PREFIX_TABLE.'user_group'; |
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198 | $query.= ' WHERE user_id = '.$user_id; |
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199 | $query.= ';'; |
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200 | mysql_query( $query ); |
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201 | |
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202 | // destruction of the favorites associated with the user |
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203 | $query = 'DELETE FROM '.PREFIX_TABLE.'favorites'; |
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204 | $query.= ' WHERE user_id = '.$user_id; |
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205 | $query.= ';'; |
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206 | mysql_query( $query ); |
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207 | |
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208 | // destruction of the sessions linked with the user |
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209 | $query = 'DELETE FROM '.PREFIX_TABLE.'sessions'; |
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210 | $query.= ' WHERE user_id = '.$user_id; |
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211 | $query.= ';'; |
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212 | mysql_query( $query ); |
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213 | |
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214 | // destruction of the user |
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215 | $query = 'DELETE FROM '.PREFIX_TABLE.'users'; |
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216 | $query.= ' WHERE id = '.$user_id; |
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217 | $query.= ';'; |
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218 | mysql_query( $query ); |
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219 | } |
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220 | |
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221 | // delete_group deletes a group identified by its $group_id. |
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222 | // It also deletes : |
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223 | // - all the access linked to this group |
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224 | // - all the links between this group and any user |
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225 | function delete_group( $group_id ) |
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226 | { |
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227 | // destruction of the access linked to the group |
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228 | $query = 'DELETE FROM '.PREFIX_TABLE.'group_access'; |
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229 | $query.= ' WHERE group_id = '.$group_id; |
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230 | $query.= ';'; |
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231 | mysql_query( $query ); |
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232 | |
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233 | // destruction of the group links for this group |
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234 | $query = 'DELETE FROM '.PREFIX_TABLE.'user_group'; |
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235 | $query.= ' WHERE group_id = '.$group_id; |
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236 | $query.= ';'; |
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237 | mysql_query( $query ); |
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238 | |
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239 | // destruction of the group |
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240 | $query = 'DELETE FROM '.PREFIX_TABLE.'groups'; |
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241 | $query.= ' WHERE id = '.$group_id; |
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242 | $query.= ';'; |
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243 | mysql_query( $query ); |
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244 | } |
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245 | |
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246 | // The check_favorites function deletes all the favorites of a user if he is |
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247 | // not allowed to see them (the category or an upper category is restricted |
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248 | // or invisible) |
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249 | function check_favorites( $user_id ) |
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250 | { |
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251 | $query = 'SELECT status'; |
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252 | $query.= ' FROM '.PREFIX_TABLE.'users'; |
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253 | $query.= ' WHERE id = '.$user_id; |
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254 | $query.= ';'; |
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255 | $row = mysql_fetch_array( mysql_query( $query ) ); |
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256 | $status = $row['status']; |
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257 | // retrieving all the restricted categories for this user |
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258 | $restricted_cat = get_all_restrictions( $user_id, $status ); |
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259 | // retrieving all the favorites for this user and comparing their |
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260 | // categories to the restricted categories |
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261 | $query = 'SELECT image_id'; |
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262 | $query.= ' FROM '.PREFIX_TABLE.'favorites'; |
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263 | $query.= ' WHERE user_id = '.$user_id; |
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264 | $query.= ';'; |
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265 | $result = mysql_query ( $query ); |
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266 | while ( $row = mysql_fetch_array( $result ) ) |
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267 | { |
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268 | // for each picture, we have to check all the categories it belongs |
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269 | // to. Indeed if a picture belongs to category_1 and category_2 and that |
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270 | // category_2 is not restricted to the user, he can have the picture as |
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271 | // favorite. |
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272 | $query = 'SELECT DISTINCT(category_id) as category_id'; |
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273 | $query.= ' FROM '.PREFIX_TABLE.'image_category'; |
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274 | $query.= ' WHERE image_id = '.$row['image_id']; |
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275 | $query.= ';'; |
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276 | $picture_result = mysql_query( $query ); |
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277 | $picture_cat = array(); |
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278 | while ( $picture_row = mysql_fetch_array( $picture_result ) ) |
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279 | { |
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280 | array_push( $picture_cat, $picture_row['category_id'] ); |
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281 | } |
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282 | if ( count( array_diff( $picture_cat, $restricted_cat ) ) == 0 ) |
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283 | { |
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284 | $query = 'DELETE FROM '.PREFIX_TABLE.'favorites'; |
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285 | $query.= ' WHERE image_id = '.$row['image_id']; |
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286 | $query.= ' AND user_id = '.$user_id; |
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287 | $query.= ';'; |
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288 | mysql_query( $query ); |
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289 | } |
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290 | } |
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291 | } |
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292 | |
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293 | // update_category updates calculated informations about a category : |
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294 | // date_last and nb_images. It also verifies that the representative picture |
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295 | // is really linked to the category. |
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296 | function update_category( $id = 'all' ) |
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297 | { |
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298 | if ( $id == 'all' ) |
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299 | { |
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300 | $query = 'SELECT id'; |
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301 | $query.= ' FROM '.PREFIX_TABLE.'categories'; |
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302 | $query.= ';'; |
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303 | $result = mysql_query( $query ); |
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304 | while ( $row = mysql_fetch_array( $result ) ) |
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305 | { |
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306 | // recursive call |
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307 | update_category( $row['id'] ); |
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308 | } |
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309 | } |
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310 | else if ( is_numeric( $id ) ) |
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311 | { |
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312 | // updating the number of pictures |
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313 | $query = 'SELECT COUNT(*) as nb_images'; |
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314 | $query.= ' FROM '.PREFIX_TABLE.'image_category'; |
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315 | $query.= ' WHERE category_id = '.$id; |
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316 | $query.= ';'; |
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317 | $row = mysql_fetch_array( mysql_query( $query ) ); |
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318 | $query = 'UPDATE '.PREFIX_TABLE.'categories'; |
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319 | $query.= ' SET nb_images = '.$row['nb_images']; |
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320 | $query.= ' WHERE id = '.$id; |
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321 | $query.= ';'; |
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322 | mysql_query( $query ); |
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323 | // updating the date_last |
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324 | $query = 'SELECT date_available'; |
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325 | $query.= ' FROM '.PREFIX_TABLE.'images'; |
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326 | $query.= ' LEFT JOIN '.PREFIX_TABLE.'image_category ON id = image_id'; |
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327 | $query.= ' WHERE category_id = '.$id; |
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328 | $query.= ' ORDER BY date_available DESC'; |
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329 | $query.= ' LIMIT 0,1'; |
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330 | $query.= ';'; |
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331 | $row = mysql_fetch_array( mysql_query( $query ) ); |
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332 | $query = 'UPDATE '.PREFIX_TABLE.'categories'; |
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333 | $query.= " SET date_last = '".$row['date_available']."'"; |
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334 | $query.= ' WHERE id = '.$id; |
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335 | $query.= ';'; |
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336 | mysql_query( $query ); |
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337 | // updating the representative_picture_id : if the representative |
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338 | // picture of the category is not any more linked to the category, we |
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339 | // have to set representative_picture_id to NULL |
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340 | $query = 'SELECT representative_picture_id'; |
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341 | $query.= ' FROM '.PREFIX_TABLE.'categories'; |
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342 | $query.= ' WHERE id = '.$id; |
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343 | $row = mysql_fetch_array( mysql_query( $query ) ); |
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344 | // if the category has no representative picture (ie |
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345 | // representative_picture_id == NULL) we don't update anything |
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346 | if ( $row['representative_picture_id'] != '' ) |
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347 | { |
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348 | $query = 'SELECT image_id'; |
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349 | $query.= ' FROM '.PREFIX_TABLE.'image_category'; |
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350 | $query.= ' WHERE category_id = '.$id; |
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351 | $query.= ' AND image_id = '.$row['representative_picture_id']; |
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352 | $query.= ';'; |
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353 | $result = mysql_query( $query ); |
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354 | if ( mysql_num_rows( $result ) == 0 ) |
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355 | { |
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356 | $query = 'UPDATE '.PREFIX_TABLE.'categories'; |
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357 | $query.= ' SET representative_picture_id = NULL'; |
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358 | $query.= ' WHERE id = '.$id; |
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359 | $query.= ';'; |
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360 | mysql_query( $query ); |
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361 | } |
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362 | } |
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363 | } |
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364 | } |
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365 | |
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366 | function check_date_format( $date ) |
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367 | { |
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368 | // date arrives at this format : DD/MM/YYYY |
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369 | list($day,$month,$year) = explode( '/', $date ); |
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370 | return checkdate ( $month, $day, $year ); |
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371 | } |
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372 | |
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373 | function date_convert( $date ) |
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374 | { |
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375 | // date arrives at this format : DD/MM/YYYY |
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376 | // It must be transformed in YYYY-MM-DD |
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377 | list($day,$month,$year) = explode( '/', $date ); |
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378 | return $year.'-'.$month.'-'.$day; |
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379 | } |
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380 | |
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381 | function date_convert_back( $date ) |
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382 | { |
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383 | // date arrives at this format : YYYY-MM-DD |
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384 | // It must be transformed in DD/MM/YYYY |
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385 | if ( $date != '' ) |
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386 | { |
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387 | list($year,$month,$day) = explode( '-', $date ); |
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388 | return $day.'/'.$month.'/'.$year; |
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389 | } |
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390 | else |
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391 | { |
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392 | return ''; |
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393 | } |
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394 | } |
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395 | |
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396 | // get_keywords returns an array with relevant keywords found in the string |
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397 | // given in argument. Keywords must be separated by comma in this string. |
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398 | // keywords must : |
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399 | // - be longer or equal to 3 characters |
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400 | // - not contain ', " or blank characters |
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401 | // - unique in the string ("test,test" -> "test") |
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402 | function get_keywords( $keywords_string ) |
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403 | { |
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404 | $keywords = array(); |
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405 | |
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406 | $candidates = explode( ',', $keywords_string ); |
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407 | foreach ( $candidates as $candidate ) { |
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408 | if ( strlen($candidate) >= 3 and !preg_match( '/(\'|"|\s)/', $candidate ) ) |
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409 | array_push( $keywords, $candidate ); |
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410 | } |
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411 | |
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412 | return array_unique( $keywords ); |
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413 | } |
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414 | |
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415 | function display_categories( $categories, $indent, |
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416 | $selected = -1, $forbidden = -1 ) |
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417 | { |
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418 | global $vtp,$sub; |
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419 | |
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420 | foreach ( $categories as $category ) { |
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421 | if ( $category['id'] != $forbidden ) |
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422 | { |
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423 | $vtp->addSession( $sub, 'associate_cat' ); |
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424 | $vtp->setVar( $sub, 'associate_cat.value', $category['id'] ); |
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425 | $content = $indent.'- '.$category['name']; |
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426 | $vtp->setVar( $sub, 'associate_cat.content', $content ); |
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427 | if ( $category['id'] == $selected ) |
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428 | $vtp->setVar( $sub, 'associate_cat.selected', ' selected="selected"' ); |
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429 | $vtp->closeSession( $sub, 'associate_cat' ); |
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430 | display_categories( $category['subcats'], $indent.str_repeat(' ',3), |
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431 | $selected, $forbidden ); |
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432 | } |
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433 | } |
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434 | } |
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435 | ?> |
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