[7589] | 1 | <?php |
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| 2 | /*********************************************** |
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| 3 | * File : diffbackend.php |
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| 4 | * Project : Z-Push |
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| 5 | * Descr : This is the abstract differential backend. |
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| 6 | * By implementing this backends there is no need |
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| 7 | * to worry about importers and exporters. Also |
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| 8 | * tracking incremental changes is not necessary, |
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| 9 | * as the DiffState used by the DiffBackend offers |
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| 10 | * this functionality by comparing the list of objects |
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| 11 | * available "last time" with the list of objects |
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| 12 | * available "now". |
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| 13 | * Please note that the differential mechanism |
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| 14 | * can consume a considerable amount of memory and cpu |
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| 15 | * power when synchronizing folders with many items. |
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| 16 | * |
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| 17 | * Created : 02.01.2012 |
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| 18 | * |
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| 19 | * Copyright 2007 - 2012 Zarafa Deutschland GmbH |
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| 20 | * |
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| 21 | * This program is free software: you can redistribute it and/or modify |
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| 22 | * it under the terms of the GNU Affero General Public License, version 3, |
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| 23 | * as published by the Free Software Foundation with the following additional |
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| 24 | * term according to sec. 7: |
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| 25 | * |
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| 26 | * According to sec. 7 of the GNU Affero General Public License, version 3, |
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| 27 | * the terms of the AGPL are supplemented with the following terms: |
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| 28 | * |
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| 29 | * "Zarafa" is a registered trademark of Zarafa B.V. |
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| 30 | * "Z-Push" is a registered trademark of Zarafa Deutschland GmbH |
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| 31 | * The licensing of the Program under the AGPL does not imply a trademark license. |
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| 32 | * Therefore any rights, title and interest in our trademarks remain entirely with us. |
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| 33 | * |
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| 34 | * However, if you propagate an unmodified version of the Program you are |
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| 35 | * allowed to use the term "Z-Push" to indicate that you distribute the Program. |
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| 36 | * Furthermore you may use our trademarks where it is necessary to indicate |
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| 37 | * the intended purpose of a product or service provided you use it in accordance |
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| 38 | * with honest practices in industrial or commercial matters. |
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| 39 | * If you want to propagate modified versions of the Program under the name "Z-Push", |
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| 40 | * you may only do so if you have a written permission by Zarafa Deutschland GmbH |
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| 41 | * (to acquire a permission please contact Zarafa at trademark@zarafa.com). |
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| 42 | * |
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| 43 | * This program is distributed in the hope that it will be useful, |
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| 44 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 45 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 46 | * GNU Affero General Public License for more details. |
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| 47 | * |
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| 48 | * You should have received a copy of the GNU Affero General Public License |
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| 49 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
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| 50 | * |
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| 51 | * Consult LICENSE file for details |
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| 52 | ************************************************/ |
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| 53 | |
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| 54 | // default backend |
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| 55 | include_once('lib/default/backend.php'); |
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| 56 | |
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| 57 | // DiffBackend components |
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| 58 | include_once('diffstate.php'); |
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| 59 | include_once('importchangesdiff.php'); |
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| 60 | include_once('exportchangesdiff.php'); |
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| 61 | |
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| 62 | |
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| 63 | abstract class BackendDiff extends Backend { |
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| 64 | protected $store; |
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| 65 | |
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| 66 | /** |
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| 67 | * Setup the backend to work on a specific store or checks ACLs there. |
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| 68 | * If only the $store is submitted, all Import/Export/Fetch/Etc operations should be |
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| 69 | * performed on this store (switch operations store). |
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| 70 | * If the ACL check is enabled, this operation should just indicate the ACL status on |
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| 71 | * the submitted store, without changing the store for operations. |
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| 72 | * For the ACL status, the currently logged on user MUST have access rights on |
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| 73 | * - the entire store - admin access if no folderid is sent, or |
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| 74 | * - on a specific folderid in the store (secretary/full access rights) |
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| 75 | * |
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| 76 | * The ACLcheck MUST fail if a folder of the authenticated user is checked! |
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| 77 | * |
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| 78 | * @param string $store target store, could contain a "domain\user" value |
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| 79 | * @param boolean $checkACLonly if set to true, Setup() should just check ACLs |
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| 80 | * @param string $folderid if set, only ACLs on this folderid are relevant |
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| 81 | * |
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| 82 | * @access public |
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| 83 | * @return boolean |
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| 84 | */ |
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| 85 | public function Setup($store, $checkACLonly = false, $folderid = false) { |
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| 86 | $this->store = $store; |
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| 87 | |
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| 88 | return true; |
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| 89 | } |
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| 90 | |
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| 91 | /** |
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| 92 | * Returns an array of SyncFolder types with the entire folder hierarchy |
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| 93 | * on the server (the array itself is flat, but refers to parents via the 'parent' property |
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| 94 | * |
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| 95 | * provides AS 1.0 compatibility |
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| 96 | * |
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| 97 | * @access public |
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| 98 | * @return array SYNC_FOLDER |
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| 99 | */ |
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| 100 | function GetHierarchy() { |
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| 101 | $folders = array(); |
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| 102 | |
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| 103 | $fl = $this->GetFolderList(); |
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| 104 | if (is_array($fl)) |
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| 105 | foreach($fl as $f) |
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| 106 | $folders[] = $this->GetFolder($f['id']); |
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| 107 | |
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| 108 | return $folders; |
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| 109 | } |
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| 110 | |
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| 111 | /** |
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| 112 | * Returns the importer to process changes from the mobile |
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| 113 | * If no $folderid is given, hierarchy importer is expected |
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| 114 | * |
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| 115 | * @param string $folderid (opt) |
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| 116 | * |
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| 117 | * @access public |
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| 118 | * @return object(ImportChanges) |
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| 119 | * @throws StatusException |
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| 120 | */ |
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| 121 | public function GetImporter($folderid = false) { |
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| 122 | return new ImportChangesDiff($this, $folderid); |
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| 123 | } |
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| 124 | |
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| 125 | /** |
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| 126 | * Returns the exporter to send changes to the mobile |
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| 127 | * If no $folderid is given, hierarchy exporter is expected |
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| 128 | * |
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| 129 | * @param string $folderid (opt) |
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| 130 | * |
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| 131 | * @access public |
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| 132 | * @return object(ExportChanges) |
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| 133 | * @throws StatusException |
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| 134 | */ |
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| 135 | public function GetExporter($folderid = false) { |
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| 136 | return new ExportChangesDiff($this, $folderid); |
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| 137 | } |
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| 138 | |
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| 139 | /** |
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| 140 | * Returns all available data of a single message |
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| 141 | * |
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| 142 | * @param string $folderid |
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| 143 | * @param string $id |
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| 144 | * @param ContentParameters $contentparameters flag |
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| 145 | * |
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| 146 | * @access public |
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| 147 | * @return object(SyncObject) |
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| 148 | * @throws StatusException |
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| 149 | */ |
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| 150 | public function Fetch($folderid, $id, $contentparameters) { |
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| 151 | // override truncation |
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| 152 | $contentparameters->SetTruncation(SYNC_TRUNCATION_ALL); |
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| 153 | $msg = $this->GetMessage($folderid, $id, $contentparameters); |
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| 154 | if ($msg === false) |
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| 155 | throw new StatusException("BackendDiff->Fetch('%s','%s'): Error, unable retrieve message from backend", SYNC_STATUS_OBJECTNOTFOUND); |
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| 156 | return $msg; |
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| 157 | } |
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| 158 | |
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| 159 | /** |
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| 160 | * Processes a response to a meeting request. |
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| 161 | * CalendarID is a reference and has to be set if a new calendar item is created |
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| 162 | * |
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| 163 | * @param string $requestid id of the object containing the request |
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| 164 | * @param string $folderid id of the parent folder of $requestid |
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| 165 | * @param string $response |
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| 166 | * |
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| 167 | * @access public |
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| 168 | * @return string id of the created/updated calendar obj |
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| 169 | * @throws StatusException |
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| 170 | */ |
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| 171 | public function MeetingResponse($requestid, $folderid, $response) { |
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| 172 | throw new StatusException(sprintf("BackendDiff->MeetingResponse('%s','%s','%s'): Error, this functionality is not supported by the diff backend", $requestid, $folderid, $response), SYNC_MEETRESPSTATUS_MAILBOXERROR); |
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| 173 | } |
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| 174 | |
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| 175 | /**---------------------------------------------------------------------------------------------------------- |
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| 176 | * Abstract DiffBackend methods |
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| 177 | * |
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| 178 | * Need to be implemented in the actual diff backend |
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| 179 | */ |
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| 180 | |
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| 181 | /** |
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| 182 | * Returns a list (array) of folders, each entry being an associative array |
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| 183 | * with the same entries as StatFolder(). This method should return stable information; ie |
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| 184 | * if nothing has changed, the items in the array must be exactly the same. The order of |
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| 185 | * the items within the array is not important though. |
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| 186 | * |
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| 187 | * @access protected |
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| 188 | * @return array/boolean false if the list could not be retrieved |
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| 189 | */ |
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| 190 | public abstract function GetFolderList(); |
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| 191 | |
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| 192 | /** |
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| 193 | * Returns an actual SyncFolder object with all the properties set. Folders |
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| 194 | * are pretty simple, having only a type, a name, a parent and a server ID. |
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| 195 | * |
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| 196 | * @param string $id id of the folder |
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| 197 | * |
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| 198 | * @access public |
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| 199 | * @return object SyncFolder with information |
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| 200 | */ |
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| 201 | public abstract function GetFolder($id); |
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| 202 | |
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| 203 | /** |
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| 204 | * Returns folder stats. An associative array with properties is expected. |
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| 205 | * |
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| 206 | * @param string $id id of the folder |
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| 207 | * |
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| 208 | * @access public |
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| 209 | * @return array |
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| 210 | * Associative array( |
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| 211 | * string "id" The server ID that will be used to identify the folder. It must be unique, and not too long |
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| 212 | * How long exactly is not known, but try keeping it under 20 chars or so. It must be a string. |
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| 213 | * string "parent" The server ID of the parent of the folder. Same restrictions as 'id' apply. |
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| 214 | * long "mod" This is the modification signature. It is any arbitrary string which is constant as long as |
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| 215 | * the folder has not changed. In practice this means that 'mod' can be equal to the folder name |
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| 216 | * as this is the only thing that ever changes in folders. (the type is normally constant) |
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| 217 | * ) |
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| 218 | */ |
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| 219 | public abstract function StatFolder($id); |
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| 220 | |
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| 221 | /** |
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| 222 | * Creates or modifies a folder |
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| 223 | * |
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| 224 | * @param string $folderid id of the parent folder |
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| 225 | * @param string $oldid if empty -> new folder created, else folder is to be renamed |
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| 226 | * @param string $displayname new folder name (to be created, or to be renamed to) |
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| 227 | * @param int $type folder type |
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| 228 | * |
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| 229 | * @access public |
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| 230 | * @return boolean status |
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| 231 | * @throws StatusException could throw specific SYNC_FSSTATUS_* exceptions |
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| 232 | * |
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| 233 | */ |
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| 234 | public abstract function ChangeFolder($folderid, $oldid, $displayname, $type); |
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| 235 | |
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| 236 | /** |
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| 237 | * Deletes a folder |
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| 238 | * |
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| 239 | * @param string $id |
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| 240 | * @param string $parent is normally false |
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| 241 | * |
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| 242 | * @access public |
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| 243 | * @return boolean status - false if e.g. does not exist |
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| 244 | * @throws StatusException could throw specific SYNC_FSSTATUS_* exceptions |
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| 245 | */ |
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| 246 | public abstract function DeleteFolder($id, $parentid); |
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| 247 | |
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| 248 | /** |
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| 249 | * Returns a list (array) of messages, each entry being an associative array |
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| 250 | * with the same entries as StatMessage(). This method should return stable information; ie |
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| 251 | * if nothing has changed, the items in the array must be exactly the same. The order of |
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| 252 | * the items within the array is not important though. |
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| 253 | * |
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| 254 | * The $cutoffdate is a date in the past, representing the date since which items should be shown. |
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| 255 | * This cutoffdate is determined by the user's setting of getting 'Last 3 days' of e-mail, etc. If |
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| 256 | * the cutoffdate is ignored, the user will not be able to select their own cutoffdate, but all |
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| 257 | * will work OK apart from that. |
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| 258 | * |
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| 259 | * @param string $folderid id of the parent folder |
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| 260 | * @param long $cutoffdate timestamp in the past from which on messages should be returned |
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| 261 | * |
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| 262 | * @access public |
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| 263 | * @return array/false array with messages or false if folder is not available |
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| 264 | */ |
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| 265 | public abstract function GetMessageList($folderid, $cutoffdate); |
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| 266 | |
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| 267 | /** |
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| 268 | * Returns the actual SyncXXX object type. The '$folderid' of parent folder can be used. |
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| 269 | * Mixing item types returned is illegal and will be blocked by the engine; ie returning an Email object in a |
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| 270 | * Tasks folder will not do anything. The SyncXXX objects should be filled with as much information as possible, |
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| 271 | * but at least the subject, body, to, from, etc. |
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| 272 | * |
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| 273 | * @param string $folderid id of the parent folder |
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| 274 | * @param string $id id of the message |
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| 275 | * @param ContentParameters $contentparameters parameters of the requested message (truncation, mimesupport etc) |
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| 276 | * |
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| 277 | * @access public |
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| 278 | * @return object/false false if the message could not be retrieved |
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| 279 | */ |
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| 280 | public abstract function GetMessage($folderid, $id, $contentparameters); |
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| 281 | |
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| 282 | /** |
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| 283 | * Returns message stats, analogous to the folder stats from StatFolder(). |
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| 284 | * |
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| 285 | * @param string $folderid id of the folder |
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| 286 | * @param string $id id of the message |
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| 287 | * |
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| 288 | * @access public |
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| 289 | * @return array or boolean if fails |
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| 290 | * Associative array( |
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| 291 | * string "id" Server unique identifier for the message. Again, try to keep this short (under 20 chars) |
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| 292 | * int "flags" simply '0' for unread, '1' for read |
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| 293 | * long "mod" This is the modification signature. It is any arbitrary string which is constant as long as |
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| 294 | * the message has not changed. As soon as this signature changes, the item is assumed to be completely |
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| 295 | * changed, and will be sent to the PDA as a whole. Normally you can use something like the modification |
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| 296 | * time for this field, which will change as soon as the contents have changed. |
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| 297 | * ) |
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| 298 | */ |
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| 299 | public abstract function StatMessage($folderid, $id); |
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| 300 | |
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| 301 | /** |
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| 302 | * Called when a message has been changed on the mobile. The new message must be saved to disk. |
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| 303 | * The return value must be whatever would be returned from StatMessage() after the message has been saved. |
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| 304 | * This way, the 'flags' and the 'mod' properties of the StatMessage() item may change via ChangeMessage(). |
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| 305 | * This method will never be called on E-mail items as it's not 'possible' to change e-mail items. It's only |
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| 306 | * possible to set them as 'read' or 'unread'. |
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| 307 | * |
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| 308 | * @param string $folderid id of the folder |
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| 309 | * @param string $id id of the message |
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| 310 | * @param SyncXXX $message the SyncObject containing a message |
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| 311 | * |
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| 312 | * @access public |
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| 313 | * @return array same return value as StatMessage() |
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| 314 | * @throws StatusException could throw specific SYNC_STATUS_* exceptions |
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| 315 | */ |
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| 316 | public abstract function ChangeMessage($folderid, $id, $message); |
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| 317 | |
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| 318 | /** |
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| 319 | * Changes the 'read' flag of a message on disk. The $flags |
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| 320 | * parameter can only be '1' (read) or '0' (unread). After a call to |
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| 321 | * SetReadFlag(), GetMessageList() should return the message with the |
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| 322 | * new 'flags' but should not modify the 'mod' parameter. If you do |
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| 323 | * change 'mod', simply setting the message to 'read' on the mobile will trigger |
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| 324 | * a full resync of the item from the server. |
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| 325 | * |
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| 326 | * @param string $folderid id of the folder |
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| 327 | * @param string $id id of the message |
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| 328 | * @param int $flags read flag of the message |
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| 329 | * |
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| 330 | * @access public |
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| 331 | * @return boolean status of the operation |
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| 332 | * @throws StatusException could throw specific SYNC_STATUS_* exceptions |
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| 333 | */ |
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| 334 | public abstract function SetReadFlag($folderid, $id, $flags); |
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| 335 | |
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| 336 | /** |
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| 337 | * Called when the user has requested to delete (really delete) a message. Usually |
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| 338 | * this means just unlinking the file its in or somesuch. After this call has succeeded, a call to |
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| 339 | * GetMessageList() should no longer list the message. If it does, the message will be re-sent to the mobile |
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| 340 | * as it will be seen as a 'new' item. This means that if this method is not implemented, it's possible to |
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| 341 | * delete messages on the PDA, but as soon as a sync is done, the item will be resynched to the mobile |
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| 342 | * |
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| 343 | * @param string $folderid id of the folder |
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| 344 | * @param string $id id of the message |
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| 345 | * |
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| 346 | * @access public |
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| 347 | * @return boolean status of the operation |
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| 348 | * @throws StatusException could throw specific SYNC_STATUS_* exceptions |
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| 349 | */ |
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| 350 | public abstract function DeleteMessage($folderid, $id); |
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| 351 | |
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| 352 | /** |
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| 353 | * Called when the user moves an item on the PDA from one folder to another. Whatever is needed |
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| 354 | * to move the message on disk has to be done here. After this call, StatMessage() and GetMessageList() |
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| 355 | * should show the items to have a new parent. This means that it will disappear from GetMessageList() |
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| 356 | * of the sourcefolder and the destination folder will show the new message |
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| 357 | * |
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| 358 | * @param string $folderid id of the source folder |
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| 359 | * @param string $id id of the message |
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| 360 | * @param string $newfolderid id of the destination folder |
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| 361 | * |
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| 362 | * @access public |
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| 363 | * @return boolean status of the operation |
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| 364 | * @throws StatusException could throw specific SYNC_MOVEITEMSSTATUS_* exceptions |
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| 365 | */ |
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| 366 | public abstract function MoveMessage($folderid, $id, $newfolderid); |
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| 367 | |
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| 368 | } |
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| 369 | ?> |
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