| <?php | <?php |
| /** | /** |
| * Databaase class. | * Databaase class. |
| */ | */ |
| class SetteeDatabase { | class SetteeDatabase { |
| /** | /** |
| * Base URL of the CouchDB REST API | * Base URL of the CouchDB REST API |
| */ | */ |
| private $conn_url; | private $conn_url; |
| /** | /** |
| * HTTP REST Client instance | * HTTP REST Client instance |
| */ | */ |
| protected $rest_client; | protected $rest_client; |
| /** | /** |
| * Name of the database | * Name of the database |
| */ | */ |
| private $dbname; | private $dbname; |
| /** | /** |
| * Default constructor | * Default constructor |
| */ | */ |
| function __construct($conn_url, $dbname) { | function __construct($conn_url, $dbname) { |
| $this->conn_url = $conn_url; | $this->conn_url = $conn_url; |
| $this->dbname = $dbname; | $this->dbname = $dbname; |
| $this->rest_client = SetteeRestClient::get_instance($this->conn_url); | $this->rest_client = SetteeRestClient::get_instance($this->conn_url); |
| } | } |
| /** | /** |
| * Get UUID from CouchDB | * Get UUID from CouchDB |
| * | * |
| * @return | * @return |
| * CouchDB-generated UUID string | * CouchDB-generated UUID string |
| * | * |
| */ | */ |
| function gen_uuid() { | function gen_uuid() { |
| $ret = $this->rest_client->http_get('_uuids'); | $ret = $this->rest_client->http_get('_uuids'); |
| return $ret['decoded']->uuids[0]; // should never be empty at this point, so no checking | return $ret['decoded']->uuids[0]; // should never be empty at this point, so no checking |
| } | } |
| /** | /** |
| * Create or update a document database | * Create or update a document database |
| * | * |
| * @param $document | * @param $document |
| * PHP object, a PHP associative array, or a JSON String representing the document to be saved. PHP Objects and arrays are JSON-encoded automatically. | * PHP object, a PHP associative array, or a JSON String representing the document to be saved. PHP Objects and arrays are JSON-encoded automatically. |
| * | * |
| * <p>If $document has a an "_id" property set, it will be used as document's unique id (even for "create" operation). | * <p>If $document has a an "_id" property set, it will be used as document's unique id (even for "create" operation). |
| * If "_id" is missing, CouchDB will be used to generate a UUID. | * If "_id" is missing, CouchDB will be used to generate a UUID. |
| * | * |
| * <p>If $document has a "_rev" property (revision), document will be updated, rather than creating a new document. | * <p>If $document has a "_rev" property (revision), document will be updated, rather than creating a new document. |
| * You have to provide "_rev" if you want to update an existing document, otherwise operation will be assumed to be | * You have to provide "_rev" if you want to update an existing document, otherwise operation will be assumed to be |
| * one of creation and you will get a duplicate document exception from CouchDB. Also, you may not provide "_rev" but | * one of creation and you will get a duplicate document exception from CouchDB. Also, you may not provide "_rev" but |
| * not provide "_id" since that is an invalid input. | * not provide "_id" since that is an invalid input. |
| * | * |
| * @param $allowRevAutoDetection | * @param $allowRevAutoDetection |
| * Default: false. When true and _rev is missing from the document, save() function will auto-detect latest revision | * Default: false. When true and _rev is missing from the document, save() function will auto-detect latest revision |
| * for a document and use it. This option is "false" by default because it involves an extra http HEAD request and | * for a document and use it. This option is "false" by default because it involves an extra http HEAD request and |
| * therefore can make save() operation slightly slower if such auto-detection is not required. | * therefore can make save() operation slightly slower if such auto-detection is not required. |
| * | * |
| * @return | * @return |
| * document object with the database id (uuid) and revision attached; | * document object with the database id (uuid) and revision attached; |
| * | * |
| * @throws SetteeCreateDatabaseException | * @throws SetteeCreateDatabaseException |
| */ | */ |
| function save($document, $allowRevAutoDetection = false) { | function save($document, $allowRevAutoDetection = false) { |
| if (is_string($document)) { | if (is_string($document)) { |
| $document = json_decode($document); | $document = json_decode($document); |
| } | } |
| // Allow passing of $document as an array (for syntactic simplicity and also because in JSON world it does not matter) | // Allow passing of $document as an array (for syntactic simplicity and also because in JSON world it does not matter) |
| if(is_array($document)) { | if(is_array($document)) { |
| $document = (object) $document; | $document = (object) $document; |
| } | } |
| if (empty($document->_id) && empty($document->_rev)) { | if (empty($document->_id) && empty($document->_rev)) { |
| $id = $this->gen_uuid(); | $id = $this->gen_uuid(); |
| } | } |
| elseif (empty($document->_id) && !empty($document->_rev)) { | elseif (empty($document->_id) && !empty($document->_rev)) { |
| throw new SetteeWrongInputException("Error: You can not save a document with a revision provided, but missing id"); | throw new SetteeWrongInputException("Error: You can not save a document with a revision provided, but missing id"); |
| } | } |
| else { | else { |
| $id = $document->_id; | $id = $document->_id; |
| if ($allowRevAutoDetection) { | if ($allowRevAutoDetection) { |
| try { | try { |
| $rev = $this->get_rev($id); | $rev = $this->get_rev($id); |
| } catch (SetteeRestClientException $e) { | } catch (SetteeRestClientException $e) { |
| // auto-detection may fail legitimately, if a document has never been saved before (new doc), so skipping error | // auto-detection may fail legitimately, if a document has never been saved before (new doc), so skipping error |
| } | } |
| if (!empty($rev)) { | if (!empty($rev)) { |
| $document->_rev = $rev; | $document->_rev = $rev; |
| } | } |
| } | } |
| } | } |
| $full_uri = $this->dbname . "/" . $this->safe_urlencode($id); | $full_uri = $this->dbname . "/" . $this->safe_urlencode($id); |
| $document_json = json_encode($document, JSON_NUMERIC_CHECK); | $document_json = json_encode($document, JSON_NUMERIC_CHECK); |
| $ret = $this->rest_client->http_put($full_uri, $document_json); | $ret = $this->rest_client->http_put($full_uri, $document_json); |
| $document->_id = $ret['decoded']->id; | $document->_id = $ret['decoded']->id; |
| $document->_rev = $ret['decoded']->rev; | $document->_rev = $ret['decoded']->rev; |
| return $document; | return $document; |
| } | } |
| /** | /** |
| * @param $doc | * @param $doc |
| * @param $name | * @param $name |
| * @param $content | * @param $content |
| * Content of the attachment in a string-buffer format. This function will automatically base64-encode content for | * Content of the attachment in a string-buffer format. This function will automatically base64-encode content for |
| * you, so you don't have to do it. | * you, so you don't have to do it. |
| * @param $mime_type | * @param $mime_type |
| * Optional. Will be auto-detected if not provided | * Optional. Will be auto-detected if not provided |
| * @return void | * @return void |
| */ | */ |
| public function add_attachment($doc, $name, $content, $mime_type = null) { | public function add_attachment($doc, $name, $content, $mime_type = null) { |
| if (empty($doc->_attachments) || !is_object($doc->_attachments)) { | if (empty($doc->_attachments) || !is_object($doc->_attachments)) { |
| $doc->_attachments = new stdClass(); | $doc->_attachments = new stdClass(); |
| } | } |
| if (empty($mime_type)) { | if (empty($mime_type)) { |
| $mime_type = $this->rest_client->content_mime_type($content); | $mime_type = $this->rest_client->content_mime_type($content); |
| } | } |
| $doc->_attachments->$name = new stdClass(); | $doc->_attachments->$name = new stdClass(); |
| $doc->_attachments->$name->content_type = $mime_type; | $doc->_attachments->$name->content_type = $mime_type; |
| $doc->_attachments->$name->data = base64_encode($content); | $doc->_attachments->$name->data = base64_encode($content); |
| } | } |
| /** | /** |
| * @param $doc | * @param $doc |
| * @param $name | * @param $name |
| * @param $file | * @param $file |
| * Full path to a file (e.g. as returned by PHP's realpath function). | * Full path to a file (e.g. as returned by PHP's realpath function). |
| * @param $mime_type | * @param $mime_type |
| * Optional. Will be auto-detected if not provided | * Optional. Will be auto-detected if not provided |
| * @return void | * @return void |
| */ | */ |
| public function add_attachment_file($doc, $name, $file, $mime_type = null) { | public function add_attachment_file($doc, $name, $file, $mime_type = null) { |
| $content = file_get_contents($file); | $content = file_get_contents($file); |
| $this->add_attachment($doc, $name, $content, $mime_type); | $this->add_attachment($doc, $name, $content, $mime_type); |
| } | } |
| /** | /** |
| * | * |
| * Retrieve a document from CouchDB | * Retrieve a document from CouchDB |
| * | * |
| * @throws SetteeWrongInputException | * @throws SetteeWrongInputException |
| * | * |
| * @param $id | * @param $id |
| * Unique ID (usually: UUID) of the document to be retrieved. | * Unique ID (usually: UUID) of the document to be retrieved. |
| * @return | * @return |
| * database document in PHP object format. | * database document in PHP object format. |
| */ | */ |
| function get($id) { | function get($id) { |
| if (empty($id)) { | if (empty($id)) { |
| throw new SetteeWrongInputException("Error: Can't retrieve a document without a uuid."); | throw new SetteeWrongInputException("Error: Can't retrieve a document without a uuid."); |
| } | } |
| $full_uri = $this->dbname . "/" . $this->safe_urlencode($id); | $full_uri = $this->dbname . "/" . $this->safe_urlencode($id); |
| $full_uri = str_replace("%3Frev%3D","?rev=",$full_uri); | $full_uri = str_replace("%3Frev%3D","?rev=",$full_uri); |
| $ret = $this->rest_client->http_get($full_uri); | $ret = $this->rest_client->http_get($full_uri); |
| return $ret['decoded']; | return $ret['decoded']; |
| } | } |
| /** | /** |
| * | * |
| * Get the latest revision of a document with document id: $id in CouchDB. | * Get the latest revision of a document with document id: $id in CouchDB. |
| * | * |
| * @throws SetteeWrongInputException | * @throws SetteeWrongInputException |
| * | * |
| * @param $id | * @param $id |
| * Unique ID (usually: UUID) of the document to be retrieved. | * Unique ID (usually: UUID) of the document to be retrieved. |
| * @return | * @return |
| * database document in PHP object format. | * database document in PHP object format. |
| */ | */ |
| function get_rev($id) { | function get_rev($id) { |
| if (empty($id)) { | if (empty($id)) { |
| throw new SetteeWrongInputException("Error: Can't query a document without a uuid."); | throw new SetteeWrongInputException("Error: Can't query a document without a uuid."); |
| } | } |
| $full_uri = $this->dbname . "/" . $this->safe_urlencode($id); | $full_uri = $this->dbname . "/" . $this->safe_urlencode($id); |
| $headers = $this->rest_client->http_head($full_uri); | $headers = $this->rest_client->http_head($full_uri); |
| if (empty($headers['Etag'])) { | if (empty($headers['Etag'])) { |
| throw new SetteeRestClientException("Error: could not retrieve revision. Server unexpectedly returned empty Etag"); | throw new SetteeRestClientException("Error: could not retrieve revision. Server unexpectedly returned empty Etag"); |
| } | } |
| $etag = str_replace('"', '', $headers['Etag']); | $etag = str_replace('"', '', $headers['Etag']); |
| return $etag; | return $etag; |
| } | } |
| /** | /** |
| * Delete a document | * Delete a document |
| * | * |
| * @param $document | * @param $document |
| * a PHP object or JSON representation of the document that has _id and _rev fields. | * a PHP object or JSON representation of the document that has _id and _rev fields. |
| * | * |
| * @return void | * @return void |
| */ | */ |
| function delete($document) { | function delete($document) { |
| if (!is_object($document)) { | if (!is_object($document)) { |
| $document = json_decode($document); | $document = json_decode($document); |
| } | } |
| $full_uri = $this->dbname . "/" . $this->safe_urlencode($document->_id) . "?rev=" . $document->_rev; | $full_uri = $this->dbname . "/" . $this->safe_urlencode($document->_id) . "?rev=" . $document->_rev; |
| $this->rest_client->http_delete($full_uri); | $this->rest_client->http_delete($full_uri); |
| } | } |
| /*----------------- View-related functions --------------*/ | /*----------------- View-related functions --------------*/ |
| /** | /** |
| * Create a new view or update an existing one. | * Create a new view or update an existing one. |
| * | * |
| * @param $design_doc | * @param $design_doc |
| * @param $view_name | * @param $view_name |
| * @param $map_src | * @param $map_src |
| * Source code of the map function in Javascript | * Source code of the map function in Javascript |
| * @param $reduce_src | * @param $reduce_src |
| * Source code of the reduce function in Javascript (optional) | * Source code of the reduce function in Javascript (optional) |
| * @return void | * @return void |
| */ | */ |
| function save_view($design_doc, $view_name, $map_src, $reduce_src = null) { | function save_view($design_doc, $view_name, $map_src, $reduce_src = null) { |
| $obj = new stdClass(); | $obj = new stdClass(); |
| $obj->_id = "_design/" . urlencode($design_doc); | $obj->_id = "_design/" . urlencode($design_doc); |
| $view_name = urlencode($view_name); | $view_name = urlencode($view_name); |
| $obj->views->$view_name->map = $map_src; | $obj->views->$view_name->map = $map_src; |
| if (!empty($reduce_src)) { | if (!empty($reduce_src)) { |
| $obj->views->$view_name->reduce = $reduce_src; | $obj->views->$view_name->reduce = $reduce_src; |
| } | } |
| // allow safe updates (even if slightly slower due to extra: rev-detection check). | // allow safe updates (even if slightly slower due to extra: rev-detection check). |
| return $this->save($obj, true); | return $this->save($obj, true); |
| } | } |
| /** | /** |
| * Create a new view or update an existing one. | * Create a new view or update an existing one. |
| * | * |
| * @param $design_doc | * @param $design_doc |
| * @param $view_name | * @param $view_name |
| * @param $key | * @param $key |
| * key parameter to a view. Can be a single value or an array (for a range). If passed an array, function assumes | * key parameter to a view. Can be a single value or an array (for a range). If passed an array, function assumes |
| * that first element is startkey, second: endkey. | * that first element is startkey, second: endkey. |
| * @param $descending | * @param $descending |
| * return results in descending order. Please don't forget that if you are using a startkey/endkey, when you change | * return results in descending order. Please don't forget that if you are using a startkey/endkey, when you change |
| * order you also need to swap startkey and endkey values! | * order you also need to swap startkey and endkey values! |
| * | * |
| * @return void | * @return void |
| */ | */ |
| function get_view($design_doc, $view_name, $key = null, $descending = false, $limit = false, $reduce=false) { | function get_view($design_doc, $view_name, $key = null, $descending = false, $limit = false, $reduce=null) { |
| $id = "_design/" . urlencode($design_doc); | $id = "_design/" . urlencode($design_doc); |
| $view_name = urlencode($view_name); | $view_name = urlencode($view_name); |
| $id .= "/_view/$view_name"; | $id .= "/_view/$view_name"; |
| $data = array(); | $data = array(); |
| if (!empty($key)) { | if (!empty($key)) { |
| if (is_string($key)) { | if (is_string($key)) { |
| $data = "key=" . '"' . $key . '"'; | $data = "key=" . '"' . $key . '"'; |
| } | } |
| elseif (is_array($key)) { | elseif (is_array($key)) { |
| list($startkey, $endkey) = $key; | list($startkey, $endkey) = $key; |
| $data = "startkey=" . '"' . $startkey . '"&' . "endkey=" . '"' . $endkey . '"'; | $data = "startkey=" . '"' . $startkey . '"&' . "endkey=" . '"' . $endkey . '"'; |
| } | } |
| if ($descending) { | if ($descending) { |
| $data .= "&descending=true"; | $data .= "&descending=true"; |
| } | } |
| if ($reduce) { | if ($reduce != null) { |
| if ($reduce == true) { | |
| $data .= "&reduce=true"; | $data .= "&reduce=true"; |
| } else { | } else { |
| $data .= "&reduce=false"; | $data .= "&reduce=false"; |
| } | |
| } | } |
| if ($limit) { | if ($limit) { |
| $data .= "&limit=".$limit; | $data .= "&limit=".$limit; |
| } | } |
| } | } |
| if (empty($id)) { | if (empty($id)) { |
| throw new SetteeWrongInputException("Error: Can't retrieve a document without a uuid."); | throw new SetteeWrongInputException("Error: Can't retrieve a document without a uuid."); |
| } | } |
| $full_uri = $this->dbname . "/" . $this->safe_urlencode($id); | $full_uri = $this->dbname . "/" . $this->safe_urlencode($id); |
| $full_uri = str_replace("%253Fgroup%253D","?group=",$full_uri); | $full_uri = str_replace("%253Fgroup%253D","?group=",$full_uri); |
| $full_uri = str_replace("%253Flimit%253D","?limit=",$full_uri); | $full_uri = str_replace("%253Flimit%253D","?limit=",$full_uri); |
| $ret = $this->rest_client->http_get($full_uri, $data); | $ret = $this->rest_client->http_get($full_uri, $data); |
| //$ret['decoded'] = str_replace("?k","&k",$ret['decoded']); | //$ret['decoded'] = str_replace("?k","&k",$ret['decoded']); |
| return $ret['decoded']; | return $ret['decoded']; |
| } | } |
| /** | /** |
| * @param $id | * @param $id |
| * @return | * @return |
| * return a properly url-encoded id. | * return a properly url-encoded id. |
| */ | */ |
| private function safe_urlencode($id) { | private function safe_urlencode($id) { |
| //-- System views like _design can have "/" in their URLs. | //-- System views like _design can have "/" in their URLs. |
| $id = rawurlencode($id); | $id = rawurlencode($id); |
| if (substr($id, 0, 1) == '_') { | if (substr($id, 0, 1) == '_') { |
| $id = str_replace('%2F', '/', $id); | $id = str_replace('%2F', '/', $id); |
| } | } |
| return $id; | return $id; |
| } | } |
| /** Getter for a database name */ | /** Getter for a database name */ |
| function get_name() { | function get_name() { |
| return $this->dbname; | return $this->dbname; |
| } | } |
| } | } |