[11610] | 1 | <?php |
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| 2 | // +-----------------------------------------------------------------------+ |
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| 3 | // | Piwigo - a PHP based photo gallery | |
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| 4 | // +-----------------------------------------------------------------------+ |
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| 5 | // | Copyright(C) 2008-2011 Piwigo Team http://piwigo.org | |
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| 6 | // | Copyright(C) 2003-2008 PhpWebGallery Team http://phpwebgallery.net | |
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| 7 | // | Copyright(C) 2002-2003 Pierrick LE GALL http://le-gall.net/pierrick | |
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| 8 | // +-----------------------------------------------------------------------+ |
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| 9 | // | This program is free software; you can redistribute it and/or modify | |
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| 10 | // | it under the terms of the GNU General Public License as published by | |
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| 11 | // | the Free Software Foundation | |
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| 12 | // | | |
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| 13 | // | This program is distributed in the hope that it will be useful, but | |
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| 14 | // | WITHOUT ANY WARRANTY; without even the implied warranty of | |
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| 15 | // | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
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| 16 | // | General Public License for more details. | |
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| 17 | // | | |
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| 18 | // | You should have received a copy of the GNU General Public License | |
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| 19 | // | along with this program; if not, write to the Free Software | |
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| 20 | // | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
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| 21 | // | USA. | |
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| 22 | // +-----------------------------------------------------------------------+ |
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| 23 | |
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| 24 | /* |
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| 25 | * Check if the current image is editable by the current user. The input |
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| 26 | * data $image_id and $user_id must be validated befored being used here. |
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| 27 | * @return bool |
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| 28 | * @author icy |
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| 29 | * |
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| 30 | */ |
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[16495] | 31 | function icy_check_image_owner($image_id) |
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[11610] | 32 | { |
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[16495] | 33 | global $user; |
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| 34 | return $user['id'] == icy_get_user_owner_of_image($image_id); |
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[11610] | 35 | } |
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[11614] | 36 | |
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| 37 | /* |
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| 38 | * Check if an image does exist |
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| 39 | * @return bool |
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| 40 | * @author icy |
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| 41 | * |
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| 42 | */ |
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[16495] | 43 | function icy_image_exists($image_id) |
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[11614] | 44 | { |
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| 45 | if (!preg_match(PATTERN_ID, $image_id)) |
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| 46 | { |
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[11637] | 47 | return false; |
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[11614] | 48 | } |
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| 49 | $query = ' |
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| 50 | SELECT COUNT(id) |
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| 51 | FROM '.IMAGES_TABLE.' |
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| 52 | WHERE id = '.$image_id.' |
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| 53 | ;'; |
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| 54 | list($count) = pwg_db_fetch_row(pwg_query($query)); |
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| 55 | return ($count > 0 ? true: false); |
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| 56 | } |
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[16495] | 57 | |
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| 58 | /* |
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| 59 | * Check if an image is editable by current user |
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| 60 | * @icy_acl access rules (provided by icy module) |
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| 61 | * @image_id identity of the image |
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| 62 | * @return boolean value |
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| 63 | * @author icy |
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| 64 | */ |
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| 65 | function icy_image_editable($image_id) { |
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| 66 | return icy_acl("edit_image_of", $image_id, icy_get_user_owner_of_image($image_id)); |
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| 67 | } |
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| 68 | |
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| 69 | function icy_image_deletable($image_id) { |
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| 70 | return icy_acl("delete_image_of", $image_id, icy_get_user_owner_of_image($image_id)); |
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| 71 | } |
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| 72 | |
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| 73 | |
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| 74 | /* |
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| 75 | * Return list of visible/uploadable categories |
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| 76 | * @author icy |
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| 77 | */ |
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| 78 | function icy_acl_get_data($symbol) { |
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| 79 | global $user, $ICY_ACL; |
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| 80 | |
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| 81 | // Load ACL setting for this user |
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| 82 | $this_user = $user['username']; |
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| 83 | $my_acl = $ICY_ACL['default']; |
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| 84 | if (array_key_exists($this_user, $ICY_ACL)) { |
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| 85 | $my_acl = array_replace($my_acl, $ICY_ACL[$this_user]); |
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| 86 | } |
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| 87 | |
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| 88 | // Load ACL setting for the symbol |
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| 89 | if (!array_key_exists($symbol, $my_acl)) { |
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| 90 | return NULL; |
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| 91 | } |
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| 92 | |
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| 93 | return $my_acl[$symbol]; |
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| 94 | } |
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| 95 | |
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| 96 | /* |
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| 97 | * |
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| 98 | * visible: upload, assosiate,... |
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| 99 | * @symbol must be ended by "_to" or "_from" |
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| 100 | */ |
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| 101 | function icy_acl_get_categories($symbol) { |
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| 102 | global $user, $conf; |
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| 103 | |
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| 104 | $all_categories = array(); |
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| 105 | $symbol_categories = array(); |
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| 106 | $symbol_settings = NULL; |
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| 107 | |
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| 108 | // It's always EMPTY array for any kind of guests |
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| 109 | if ($user['id'] == $conf['guest_id']) { |
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| 110 | return $symbol_categories; |
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| 111 | } |
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| 112 | |
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| 113 | // check if $symbol is valid |
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| 114 | if (!preg_match("/_(to|from)$/", $symbol)) { |
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| 115 | return $symbol_categories; |
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| 116 | } |
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| 117 | |
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| 118 | $symbol_settings = icy_acl_get_data($symbol); |
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| 119 | if (!$symbol_settings) { |
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| 120 | return $symbol_categories; |
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| 121 | } |
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| 122 | |
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| 123 | // all known categories in the system |
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| 124 | $query = 'SELECT id FROM '.CATEGORIES_TABLE.';'; |
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| 125 | $all_categories = array_unique(array_from_query($query, 'id')); |
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| 126 | $forbidden_categories = explode(',',calculate_permissions($user['id'], $user['status'])); |
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| 127 | |
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| 128 | // ICY_ACL allows user to access all categories. In this case, |
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| 129 | // the plugin 'community' plays an empty role (we just supress it) |
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| 130 | if (icy_acl_symbol_data_wide_open($symbol_settings)) { |
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| 131 | $symbol_categories = $all_categories; |
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| 132 | } |
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| 133 | elseif (is_array($symbol_settings)) { |
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| 134 | $symbol_categories = array_values(array_intersect($symbol_settings, $all_categories)); |
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| 135 | } |
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| 136 | else { |
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| 137 | // not wide-open, not an-array. So waht!? |
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| 138 | $symbol_settings = array(); |
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| 139 | } |
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| 140 | |
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| 141 | // Make sure categories are in our sytem |
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| 142 | // remove all forbidden categories from the list |
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| 143 | if (in_array('sub', icy_acl_get_data($symbol))) { |
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| 144 | // FIXME: (get_subcat_ids) requires a 0-based array |
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| 145 | // FIXME: + array(0) is really a trick :) In Piwigo 2.4, (get_subcat_ids) |
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| 146 | // FIXME: will generate NOTICE (SQL syntax error) if $symbol_categories is empty. |
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| 147 | $symbol_categories = array_merge($symbol_categories, get_subcat_ids($symbol_categories + array(0))); |
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| 148 | } |
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| 149 | $symbol_categories = array_diff($symbol_categories, $forbidden_categories); |
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| 150 | return array_values($symbol_categories); |
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| 151 | } |
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| 152 | /* |
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| 153 | * FIXME: Test if current user is logged in |
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| 154 | * FIXME: $guestowner must be provided explicitly |
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| 155 | * |
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| 156 | * Check if the current user has permission to do something |
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| 157 | * @symbol Action to be checked |
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| 158 | * @guestdata Object of the action |
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| 159 | * @guestowner Owner of @guestdata |
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| 160 | * |
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| 161 | * There are two cases of @symbol: |
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| 162 | * - _from/_to: action on an category |
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| 163 | * - _of : action on the author |
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| 164 | * - others : boolean flag |
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| 165 | * |
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| 166 | * There are three cases of symbol data |
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| 167 | * - Array of categories (' identities) [_from/_to] |
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| 168 | * $guestowner is simply ignored |
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| 169 | * - Array of usernames (list of authors) [_of] |
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| 170 | * $guestowner must be specified |
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| 171 | * - Others: {"any", "owner", TRUE, FALSE} [others] |
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| 172 | */ |
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| 173 | function icy_acl($symbol, $guestdata = NULL, $guestowner = NULL) { |
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| 174 | global $user, $ICY_ACL, $conf; |
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| 175 | |
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| 176 | // Load ACL setting for this user |
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| 177 | $this_user = $user['id']; |
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| 178 | |
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| 179 | if ($user['id'] == $conf['guest_id']) { |
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| 180 | return FALSE; |
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| 181 | } |
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| 182 | elseif (is_admin()) { |
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| 183 | return TRUE; |
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| 184 | } |
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| 185 | |
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| 186 | $symbol_settings = icy_acl_get_data($symbol); |
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| 187 | |
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| 188 | |
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| 189 | if (! preg_match("/_(to|from|of)$/", $symbol)) { |
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| 190 | return is_bool($symbol_settings) ? $symbol_settings: FALSE; |
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| 191 | } |
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| 192 | |
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| 193 | if (! is_array($symbol_settings) ) { |
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| 194 | return FALSE; |
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| 195 | } elseif (icy_acl_symbol_data_wide_open($symbol_settings)) { |
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| 196 | return TRUE; |
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| 197 | } |
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| 198 | |
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| 199 | if (preg_match("/_(to|from)$/", $symbol)) { |
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| 200 | return in_array($guestdata, $symbol_settings); |
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| 201 | } |
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| 202 | elseif (preg_match("/_of$/", $symbol)) { |
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| 203 | $guestowner = icy_get_username_of($guestowner); |
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| 204 | // Replace 'owner' by the $guestowner. For example |
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| 205 | // array('owner','ruby', 12) => array($guestowner, 'ruby', 12) |
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| 206 | array_walk($symbol_settings, |
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| 207 | create_function('&$val, $key', |
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| 208 | 'if ($val == "owner") {$val = "'.$user['username'].'";}')); |
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| 209 | return in_array($guestowner, $symbol_settings); |
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| 210 | } |
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| 211 | } |
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| 212 | |
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| 213 | function icy_acl_symbol_data_wide_open($symbol_data) { |
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| 214 | return (is_array($symbol_data) and in_array("any", $symbol_data)); |
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| 215 | } |
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| 216 | |
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| 217 | /* |
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| 218 | * Write some logs for debugging |
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| 219 | * @notes Data will be written to STDERRR (default) |
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| 220 | * or to file `<ROOT>/_data/icy.log` |
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| 221 | * @author icy |
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| 222 | */ |
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| 223 | function icy_log($st, $stderr = FALSE) { |
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| 224 | if ($stderr === TRUE) { |
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| 225 | $_f_log = "php://stderr"; |
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| 226 | } |
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| 227 | else { |
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| 228 | $_f_log = PHPWG_ROOT_PATH.'_data/icy.log'; |
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| 229 | } |
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| 230 | |
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| 231 | $_f_handle = fopen($_f_log, 'a'); |
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| 232 | if ($_f_handle) { |
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| 233 | $new_line = "\n"; |
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| 234 | fwrite($_f_handle, "piwigo/icy_picture_modify: $st". $new_line ); |
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| 235 | if ($stderr !== TRUE) { |
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| 236 | fclose($_f_handle); |
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| 237 | } |
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| 238 | } |
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| 239 | } |
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| 240 | |
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| 241 | /* |
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| 242 | * Get UserId from their UserName |
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| 243 | * @user_name username as string |
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| 244 | * @author icy |
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| 245 | */ |
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| 246 | function icy_get_user_id_from_name($user_name) { |
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| 247 | $user_name = pwg_db_real_escape_string($user_name); |
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| 248 | |
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| 249 | $query = ' |
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| 250 | SELECT id |
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| 251 | FROM '.USERS_TABLE.' |
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| 252 | WHERE username = "'.$user_name.'" |
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| 253 | LIMIT 1 |
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| 254 | ;'; |
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| 255 | |
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| 256 | list($user_id) = pwg_db_fetch_row(pwg_query($query)); |
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| 257 | |
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| 258 | // FIXME: Is this the best way? |
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| 259 | if ($user_id == NULL) $user_id = 0; |
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| 260 | |
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| 261 | #! icy_log("icy_get_user_id_from_name: map userid <= username: $user_name <= $user_id"); |
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| 262 | return $user_id; |
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| 263 | } |
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| 264 | |
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| 265 | /* |
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| 266 | * Rerturn the owner id of an image |
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| 267 | * @author icy |
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| 268 | * @image_id identity of the image |
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| 269 | */ |
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| 270 | function icy_get_user_owner_of_image($image_id) { |
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| 271 | // FIXME: Clean this up!!! |
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| 272 | if (!preg_match(PATTERN_ID, $image_id)) |
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| 273 | bad_request('invalid picture identifier'); |
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| 274 | |
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| 275 | $query = ' |
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| 276 | SELECT added_by |
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| 277 | FROM '.IMAGES_TABLE.' |
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| 278 | WHERE id = '.$image_id.' |
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| 279 | LIMIT 1 |
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| 280 | ;'; |
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| 281 | |
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| 282 | list($owner) = pwg_db_fetch_row(pwg_query($query)); |
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| 283 | #! icy_log("icy_get_user_owner_of_image: image_id, added_by = $image_id, $owner"); |
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| 284 | return $owner ? $owner : 0; |
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| 285 | } |
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| 286 | |
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| 287 | /* |
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| 288 | * Return the username from user_id |
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| 289 | */ |
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| 290 | function icy_get_username_of($user_id) { |
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| 291 | if (!preg_match(PATTERN_ID, $user_id)) |
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| 292 | bad_request('invalid user identifier'); |
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| 293 | |
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| 294 | $query = ' |
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| 295 | SELECT username |
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| 296 | FROM '.USERS_TABLE.' |
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| 297 | WHERE id = '.$user_id.' |
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| 298 | LIMIT 1 |
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| 299 | ;'; |
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| 300 | |
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| 301 | list($username) = pwg_db_fetch_row(pwg_query($query)); |
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| 302 | #! icy_log("icy_get_username_of: user_id, user_name = $user_id, $username"); |
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| 303 | return $username; |
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| 304 | } |
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| 305 | |
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| 306 | /* |
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| 307 | * Check if a plugin is enabled |
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| 308 | * @plugin_name name of the plugin |
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| 309 | * @author icy |
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| 310 | */ |
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| 311 | function icy_plugin_enabled($plugin_name) { |
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| 312 | $return = false; |
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| 313 | |
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| 314 | $query = ' |
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| 315 | SELECT count(id) |
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| 316 | FROM '.PLUGINS_TABLE.' |
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| 317 | WHERE id = "'.pwg_db_real_escape_string($plugin_name).'" |
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| 318 | AND state="active" |
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| 319 | LIMIT 1 |
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| 320 | ;'; |
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| 321 | |
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| 322 | list($count) = pwg_db_fetch_row(pwg_query($query)); |
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| 323 | $return = ($count == 1 ? true : false); |
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| 324 | |
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| 325 | // we need the file ^^ |
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| 326 | if ($plugin_name == "community") |
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| 327 | $return = $return |
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| 328 | and is_file(PHPWG_PLUGINS_PATH |
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| 329 | .'community/include/functions_community.inc.php'); |
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| 330 | |
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| 331 | return $return; |
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| 332 | } |
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| 333 | |
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| 334 | /* |
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| 335 | * Load ICY_ACL configuration from files |
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| 336 | * @author icy |
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| 337 | */ |
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| 338 | function icy_acl_load_configuration($force = FALSE) { |
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| 339 | global $ICY_ACL; |
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| 340 | $conf_path = PHPWG_ROOT_PATH.PWG_LOCAL_DIR.'config/icy_acl.zml'; |
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| 341 | |
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| 342 | if (($force == FALSE) |
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| 343 | and isset($ICY_ACL['default']) |
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| 344 | and isset($_SESSION['icy_picture_modify_acl_mtime']) |
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| 345 | and ($_SESSION['icy_picture_modify_acl_mtime'] == filemtime($conf_path))) { |
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| 346 | #! icy_log("icy_acl_load_configuration: configuration is up-to-date"); |
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| 347 | return FALSE; |
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| 348 | } |
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| 349 | |
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| 350 | $ICY_ACL = icy_zml_parser(<<<EOF |
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| 351 | default: |
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| 352 | edit_image_of: owner |
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| 353 | delete_image_of: |
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| 354 | upload_image_to: sub |
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| 355 | moderate_image: no |
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| 356 | create_gallery_to: sub |
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| 357 | associate_image_to: |
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| 358 | present_image_to: sub |
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| 359 | EOF |
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| 360 | ); |
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| 361 | |
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| 362 | if (file_exists($conf_path)) { |
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| 363 | #! icy_log("icy_acl_load_configuration: now loading ACL from $conf_path"); |
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| 364 | $ICY_ACL = array_replace($ICY_ACL, icy_zml_parser(file($conf_path))); |
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| 365 | $_SESSION['icy_picture_modify_acl_mtime'] = filemtime($conf_path); |
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| 366 | } |
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| 367 | |
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| 368 | return TRUE; |
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| 369 | } |
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| 370 | |
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| 371 | /* |
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| 372 | * Return array of variable from a `.zml` array / string |
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| 373 | * Syntax of the `.zml` file can be found in `doc/zaml.md` |
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| 374 | * @author icy |
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| 375 | */ |
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| 376 | function icy_zml_parser($data) { |
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| 377 | $acl = array(); |
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| 378 | $author = 'default'; |
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| 379 | $acl[$author] = array(); |
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| 380 | |
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| 381 | if (is_string($data)) { |
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| 382 | $data = preg_split("/[\r\n]/", $data); |
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| 383 | } |
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| 384 | |
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| 385 | foreach($data as $line) { |
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| 386 | # AUTHOR: |
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| 387 | if (preg_match('/^([^[:space:]:]+):$/', $line, $gs)) { |
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| 388 | $author = trim($gs[1]); |
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| 389 | if (! array_key_exists($author, $acl)) { |
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| 390 | $acl[$author] = array(); |
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| 391 | } |
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| 392 | continue; |
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| 393 | } |
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| 394 | |
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| 395 | # AUTHOR: @REFERENCE |
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| 396 | if (preg_match('/^([^[:space:]:]+):[[:space:]]+@([^[:space:]:]+)$/', $line, $gs)) { |
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| 397 | $ref_author = trim($gs[2]); |
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| 398 | if (!array_key_exists($ref_author, $acl)) { |
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| 399 | continue; |
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| 400 | } |
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| 401 | $author = trim($gs[1]); |
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| 402 | if (! array_key_exists($author, $acl)) { |
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| 403 | $acl[$author] = array(); |
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| 404 | } |
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| 405 | $acl[$author] = array_replace($acl[$ref_author], $acl[$author]); |
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| 406 | } |
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| 407 | |
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| 408 | # <two spaces> KEY: [VALUE] |
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| 409 | if (preg_match('/ ([^:]+):(.*)$/', $line, $gs)) { |
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| 410 | $key = $gs[1]; |
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| 411 | $val = trim($gs[2]); |
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| 412 | if (in_array($val, array("","false","no"))) { |
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| 413 | $val = FALSE; |
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| 414 | } |
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| 415 | elseif (in_array($val, array("yes", "true"))) { |
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| 416 | $val = TRUE; |
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| 417 | } |
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| 418 | else { |
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| 419 | $val = array_unique(preg_split("/[[:space:],:;]+/", $val)); |
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| 420 | } |
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| 421 | $acl[$author][$key] = $val; |
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| 422 | } |
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| 423 | |
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| 424 | # Other line is ignored :) |
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| 425 | } |
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| 426 | return $acl; |
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| 427 | } |
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| 428 | |
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| 429 | /* |
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| 430 | * Overwrite the ACl setings from community plugin |
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| 431 | * @author: icy |
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| 432 | */ |
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| 433 | function icy_acl_fix_community($force = FALSE) { |
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| 434 | global $user, $_SESSION; |
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| 435 | |
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| 436 | if (!icy_plugin_enabled("community")) { |
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| 437 | return TRUE; |
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| 438 | } |
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| 439 | |
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| 440 | require_once(PHPWG_PLUGINS_PATH.'community/include/functions_community.inc.php'); |
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| 441 | |
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| 442 | # <community_support> |
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| 443 | $cache_key = community_get_cache_key(); |
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| 444 | if (!isset($cache_key)) { |
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| 445 | $cache_key = community_update_cache_key(); |
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| 446 | } |
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| 447 | |
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| 448 | if (($force == FALSE) |
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| 449 | and isset($_SESSION['community_user_permissions']) |
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| 450 | and isset($_SESSION['community_user_permissions']['icy_acl_fixed'])) { |
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| 451 | #! icy_log("icy_fix_community_acl: the fix is up-to-date " . print_r($_SESSION['community_user_permissions'], true)); |
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| 452 | return TRUE; |
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| 453 | } |
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| 454 | |
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| 455 | # icy_log("WARNING: icy_fix_community_acl: the fix is out-of-date. will fix it again"); |
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| 456 | # </community_support> |
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| 457 | |
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| 458 | $return = array( |
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| 459 | 'create_categories' => array(), |
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| 460 | 'upload_categories' => array(), |
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| 461 | 'permission_ids' => array(), |
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| 462 | ); |
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| 463 | |
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| 464 | $return['upload_whole_gallery'] = icy_acl_symbol_data_wide_open(icy_acl_get_data("upload_image_to")); |
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| 465 | $return['create_whole_gallery'] = icy_acl_symbol_data_wide_open(icy_acl_get_data("create_gallery_to")); |
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| 466 | $return['upload_categories'] = icy_acl_get_categories("upload_image_to"); |
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| 467 | $return['create_categories'] = icy_acl_get_categories("create_gallery_to"); |
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| 468 | $return['permission_ids'] = array(); |
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| 469 | $return['icy_acl_fixed'] = 1; |
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| 470 | |
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| 471 | $_SESSION['community_user_permissions'] = $return; |
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| 472 | $_SESSION['community_cache_key'] = $cache_key; |
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| 473 | $_SESSION['community_user_id'] = $user['id']; |
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| 474 | } |
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| 475 | |
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| 476 | |
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| 477 | if (!function_exists('array_replace')) { |
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| 478 | function array_replace() { |
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| 479 | $array=array(); |
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| 480 | $n=func_num_args(); |
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| 481 | while ($n-- >0) $array+=func_get_arg($n); |
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| 482 | return $array; |
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| 483 | } |
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| 484 | } |
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[11610] | 485 | ?> |
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