pagination by docid
pagination by docid


Former-commit-id: 3aa6116d88acaa6e423bf1d972cda0f2a51d9f5b

--- a/couchdb/settee/src/classes/SetteeDatabase.class.php
+++ b/couchdb/settee/src/classes/SetteeDatabase.class.php
@@ -1,319 +1,316 @@
 <?php
 
 /**
-* Databaase class.
-*/
+ * Databaase class.
+ */
 class SetteeDatabase {
 
-  /**
-  * Base URL of the CouchDB REST API
-  */
-  private $conn_url;
-  
-  /**
-  * HTTP REST Client instance
-  */
-  protected $rest_client;
-  
-  /**
-  * Name of the database
-  */
-  private $dbname;
-  
-  /**
-  * Default constructor
-  */ 
-  function __construct($conn_url, $dbname) {
-    $this->conn_url = $conn_url;
-    $this->dbname = $dbname;
-    $this->rest_client = SetteeRestClient::get_instance($this->conn_url);
-  }
-
-
-  /**
-  * Get UUID from CouchDB
-  *
-  * @return
-  *     CouchDB-generated UUID string
-  *
-  */
-  function gen_uuid() {
-    $ret = $this->rest_client->http_get('_uuids');
-    return $ret['decoded']->uuids[0]; // should never be empty at this point, so no checking
-  }
-
- /**
-  * Create or update a document database
-  *
-  * @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.
-  *
-  * <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.
-  *
-  * <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
-  * 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.
-  *
-  * @param $allowRevAutoDetection
-  *   Default: false. When true and _rev is missing from the document, save() function will auto-detect latest revision
-  * for a document and use it. This option is "false" by default because it involves an extra http HEAD request and
-  * therefore can make save() operation slightly slower if such auto-detection is not required.
-  *
-  * @return
-  *     document object with the database id (uuid) and revision attached;
-  *
-  *  @throws SetteeCreateDatabaseException
-  */
-  function save($document, $allowRevAutoDetection = false) {
-    if (is_string($document)) {
-      $document = json_decode($document);
-    }
-
-    // Allow passing of $document as an array (for syntactic simplicity and also because in JSON world it does not matter) 
-    if(is_array($document)) {
-      $document = (object) $document;
-    }
-
-    if (empty($document->_id) && empty($document->_rev)) {
-      $id = $this->gen_uuid();
-    }
-    elseif (empty($document->_id) && !empty($document->_rev)) {
-      throw new SetteeWrongInputException("Error: You can not save a document with a revision provided, but missing id");
-    }
-    else {
-      $id = $document->_id;
-
-      if ($allowRevAutoDetection) {
-        try {
-          $rev = $this->get_rev($id);
-        } catch (SetteeRestClientException $e) {
-          // auto-detection may fail legitimately, if a document has never been saved before (new doc), so skipping error
-        }
-        if (!empty($rev)) {
-          $document->_rev = $rev;
-        }
-      }
-    }
-    
-    $full_uri = $this->dbname . "/" . $this->safe_urlencode($id);
-    $document_json = json_encode($document, JSON_NUMERIC_CHECK);
-    
-    $ret = $this->rest_client->http_put($full_uri, $document_json);
-
-    $document->_id = $ret['decoded']->id;
-    $document->_rev = $ret['decoded']->rev;
-
-    return $document;
-  }
-
-  /**
-   * @param  $doc
-   * @param  $name
-   * @param  $content
-   *    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.
-   * @param  $mime_type
-   *    Optional. Will be auto-detected if not provided
-   * @return void
-   */
-  public function add_attachment($doc, $name, $content, $mime_type = null) {
-    if (empty($doc->_attachments) || !is_object($doc->_attachments)) {
-      $doc->_attachments = new stdClass();
-    }
-
-    if (empty($mime_type)) {
-      $mime_type = $this->rest_client->content_mime_type($content);
-    }
-
-    $doc->_attachments->$name = new stdClass();
-    $doc->_attachments->$name->content_type = $mime_type;
-    $doc->_attachments->$name->data = base64_encode($content);
-  }  
-
-  /**
-   * @param  $doc
-   * @param  $name
-   * @param  $file
-   *    Full path to a file (e.g. as returned by PHP's realpath function).
-   * @param  $mime_type
-   *    Optional. Will be auto-detected if not provided
-   * @return void
-   */
-  public function add_attachment_file($doc, $name, $file, $mime_type = null) {
-    $content = file_get_contents($file);
-    $this->add_attachment($doc, $name, $content, $mime_type);
-  }
-
-  /**
-   *
-   * Retrieve a document from CouchDB
-   *
-   * @throws SetteeWrongInputException
-   * 
-   * @param  $id
-   *    Unique ID (usually: UUID) of the document to be retrieved.
-   * @return
-   *    database document in PHP object format.
-   */
-  function get($id) {
-    if (empty($id)) {
-      throw new SetteeWrongInputException("Error: Can't retrieve a document without a uuid.");
-    }
-
-    $full_uri = $this->dbname . "/" . $this->safe_urlencode($id);
-$full_uri = str_replace("%3Frev%3D","?rev=",$full_uri);
-    $ret = $this->rest_client->http_get($full_uri);
-    return $ret['decoded'];
-  }
-
-    /**
-   *
-   * Get the latest revision of a document with document id: $id in CouchDB.
-   *
-   * @throws SetteeWrongInputException
-   *
-   * @param  $id
-   *    Unique ID (usually: UUID) of the document to be retrieved.
-   * @return
-   *    database document in PHP object format.
-   */
-  function get_rev($id) {
-    if (empty($id)) {
-      throw new SetteeWrongInputException("Error: Can't query a document without a uuid.");
-    }
-
-    $full_uri = $this->dbname . "/" . $this->safe_urlencode($id);
-    $headers = $this->rest_client->http_head($full_uri);
-	if (empty($headers['Etag'])) {
-	  throw new SetteeRestClientException("Error: could not retrieve revision. Server unexpectedly returned empty Etag");
-	}
-    $etag = str_replace('"', '', $headers['Etag']);
-    return $etag;
-  }
-  
-  /**
-  * Delete a document
-  *
-  * @param $document
-  *    a PHP object or JSON representation of the document that has _id and _rev fields.
-  *
-  * @return void 
-  */  
-  function delete($document) {
-    if (!is_object($document)) {
-      $document = json_decode($document);
-    }
-
-    $full_uri = $this->dbname . "/" . $this->safe_urlencode($document->_id) . "?rev=" . $document->_rev;
-    $this->rest_client->http_delete($full_uri);
-  }
-
-  
-  /*-----------------  View-related functions --------------*/
-
-  /**
-   * Create a new view or update an existing one.
-   *
-   * @param  $design_doc
-   * @param  $view_name
-   * @param  $map_src
-   *    Source code of the map function in Javascript
-   * @param  $reduce_src
-   *    Source code of the reduce function  in Javascript (optional)
-   * @return void
-   */
-  function save_view($design_doc, $view_name, $map_src, $reduce_src = null) {
-    $obj = new stdClass();
-    $obj->_id = "_design/" . urlencode($design_doc);
-    $view_name = urlencode($view_name);
-    $obj->views->$view_name->map = $map_src;
-    if (!empty($reduce_src)) {
-      $obj->views->$view_name->reduce = $reduce_src;
-    }
-
-    // allow safe updates (even if slightly slower due to extra: rev-detection check).
-    return $this->save($obj, true);
-  }
-
-  /**
-   * Create a new view or update an existing one.
-   *
-   * @param  $design_doc
-   * @param  $view_name
-   * @param  $key
-   *    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.
-   * @param  $descending
-   *    return results in descending order. Please don't forget that if you are using a startkey/endkey, when you change
-   *  order you also need to swap startkey and endkey values!
-   * 
-   * @return void
-   */
-  function get_view($design_doc, $view_name, $key = null, $descending = false, $limit = false, $reduce=null) {
-    $id = "_design/" . urlencode($design_doc);
-    $view_name = urlencode($view_name);
-    $id .= "/_view/$view_name";
-
-    $data = array();
-    if (!empty($key)) {
-      if (is_string($key)) {
-        $data = "key=" . '"' . $key . '"';
-      }
-      elseif (is_array($key)) {
-        list($startkey, $endkey) = $key;
-        $data = "startkey=" . '"' . $startkey . '"&' . "endkey=" . '"' . $endkey . '"';
-      }
-
-      if ($descending) {
-        $data .= "&descending=true";
-      }
-      if ($reduce != null) {
-      if ($reduce == true) {
-        $data .= "&reduce=true";
-      } else {
-          $data .= "&reduce=false";
-      }
-      }
-      if ($limit) {
-          $data .= "&limit=".$limit;
-      }
-    }
-
-
-
-    if (empty($id)) {
-      throw new SetteeWrongInputException("Error: Can't retrieve a document without a uuid.");
-    }
-
-    $full_uri = $this->dbname . "/" . $this->safe_urlencode($id);
-
-$full_uri = str_replace("%253Fgroup%253D","?group=",$full_uri);
-$full_uri = str_replace("%253Flimit%253D","?limit=",$full_uri);
-    $ret = $this->rest_client->http_get($full_uri, $data);
-    //$ret['decoded'] = str_replace("?k","&k",$ret['decoded']);
-    return $ret['decoded'];
-    
-  }
-
-  /**
-   * @param  $id
-   * @return
-   *    return a properly url-encoded id.
-   */
-  private function safe_urlencode($id) {
-    //-- System views like _design can have "/" in their URLs.
-    $id = rawurlencode($id);
-    if (substr($id, 0, 1) == '_') {
-      $id = str_replace('%2F', '/', $id);
-    }
-    return $id;
-  }
-  
-  /** Getter for a database name */
-  function get_name() {
-    return $this->dbname;
-  }
+    /**
+     * Base URL of the CouchDB REST API
+     */
+    private $conn_url;
+
+    /**
+     * HTTP REST Client instance
+     */
+    protected $rest_client;
+
+    /**
+     * Name of the database
+     */
+    private $dbname;
+
+    /**
+     * Default constructor
+     */
+    function __construct($conn_url, $dbname) {
+        $this->conn_url = $conn_url;
+        $this->dbname = $dbname;
+        $this->rest_client = SetteeRestClient::get_instance($this->conn_url);
+    }
+
+    /**
+     * Get UUID from CouchDB
+     *
+     * @return
+     *     CouchDB-generated UUID string
+     *
+     */
+    function gen_uuid() {
+        $ret = $this->rest_client->http_get('_uuids');
+        return $ret['decoded']->uuids[0]; // should never be empty at this point, so no checking
+    }
+
+    /**
+     * Create or update a document database
+     *
+     * @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.
+     *
+     * <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.
+     *
+     * <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
+     * 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.
+     *
+     * @param $allowRevAutoDetection
+     *   Default: false. When true and _rev is missing from the document, save() function will auto-detect latest revision
+     * for a document and use it. This option is "false" by default because it involves an extra http HEAD request and
+     * therefore can make save() operation slightly slower if such auto-detection is not required.
+     *
+     * @return
+     *     document object with the database id (uuid) and revision attached;
+     *
+     *  @throws SetteeCreateDatabaseException
+     */
+    function save($document, $allowRevAutoDetection = false) {
+        if (is_string($document)) {
+            $document = json_decode($document);
+        }
+
+        // Allow passing of $document as an array (for syntactic simplicity and also because in JSON world it does not matter) 
+        if (is_array($document)) {
+            $document = (object) $document;
+        }
+
+        if (empty($document->_id) && empty($document->_rev)) {
+            $id = $this->gen_uuid();
+        } elseif (empty($document->_id) && !empty($document->_rev)) {
+            throw new SetteeWrongInputException("Error: You can not save a document with a revision provided, but missing id");
+        } else {
+            $id = $document->_id;
+
+            if ($allowRevAutoDetection) {
+                try {
+                    $rev = $this->get_rev($id);
+                } catch (SetteeRestClientException $e) {
+                    // auto-detection may fail legitimately, if a document has never been saved before (new doc), so skipping error
+                }
+                if (!empty($rev)) {
+                    $document->_rev = $rev;
+                }
+            }
+        }
+
+        $full_uri = $this->dbname . "/" . $this->safe_urlencode($id);
+        $document_json = json_encode($document, JSON_NUMERIC_CHECK);
+
+        $ret = $this->rest_client->http_put($full_uri, $document_json);
+
+        $document->_id = $ret['decoded']->id;
+        $document->_rev = $ret['decoded']->rev;
+
+        return $document;
+    }
+
+    /**
+     * @param  $doc
+     * @param  $name
+     * @param  $content
+     *    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.
+     * @param  $mime_type
+     *    Optional. Will be auto-detected if not provided
+     * @return void
+     */
+    public function add_attachment($doc, $name, $content, $mime_type = null) {
+        if (empty($doc->_attachments) || !is_object($doc->_attachments)) {
+            $doc->_attachments = new stdClass();
+        }
+
+        if (empty($mime_type)) {
+            $mime_type = $this->rest_client->content_mime_type($content);
+        }
+
+        $doc->_attachments->$name = new stdClass();
+        $doc->_attachments->$name->content_type = $mime_type;
+        $doc->_attachments->$name->data = base64_encode($content);
+    }
+
+    /**
+     * @param  $doc
+     * @param  $name
+     * @param  $file
+     *    Full path to a file (e.g. as returned by PHP's realpath function).
+     * @param  $mime_type
+     *    Optional. Will be auto-detected if not provided
+     * @return void
+     */
+    public function add_attachment_file($doc, $name, $file, $mime_type = null) {
+        $content = file_get_contents($file);
+        $this->add_attachment($doc, $name, $content, $mime_type);
+    }
+
+    /**
+     *
+     * Retrieve a document from CouchDB
+     *
+     * @throws SetteeWrongInputException
+     * 
+     * @param  $id
+     *    Unique ID (usually: UUID) of the document to be retrieved.
+     * @return
+     *    database document in PHP object format.
+     */
+    function get($id) {
+        if (empty($id)) {
+            throw new SetteeWrongInputException("Error: Can't retrieve a document without a uuid.");
+        }
+
+        $full_uri = $this->dbname . "/" . $this->safe_urlencode($id);
+        $full_uri = str_replace("%3Frev%3D", "?rev=", $full_uri);
+        $ret = $this->rest_client->http_get($full_uri);
+        return $ret['decoded'];
+    }
+
+    /**
+     *
+     * Get the latest revision of a document with document id: $id in CouchDB.
+     *
+     * @throws SetteeWrongInputException
+     *
+     * @param  $id
+     *    Unique ID (usually: UUID) of the document to be retrieved.
+     * @return
+     *    database document in PHP object format.
+     */
+    function get_rev($id) {
+        if (empty($id)) {
+            throw new SetteeWrongInputException("Error: Can't query a document without a uuid.");
+        }
+
+        $full_uri = $this->dbname . "/" . $this->safe_urlencode($id);
+        $headers = $this->rest_client->http_head($full_uri);
+        if (empty($headers['Etag'])) {
+            throw new SetteeRestClientException("Error: could not retrieve revision. Server unexpectedly returned empty Etag");
+        }
+        $etag = str_replace('"', '', $headers['Etag']);
+        return $etag;
+    }
+
+    /**
+     * Delete a document
+     *
+     * @param $document
+     *    a PHP object or JSON representation of the document that has _id and _rev fields.
+     *
+     * @return void 
+     */
+    function delete($document) {
+        if (!is_object($document)) {
+            $document = json_decode($document);
+        }
+
+        $full_uri = $this->dbname . "/" . $this->safe_urlencode($document->_id) . "?rev=" . $document->_rev;
+        $this->rest_client->http_delete($full_uri);
+    }
+
+    /* -----------------  View-related functions -------------- */
+
+    /**
+     * Create a new view or update an existing one.
+     *
+     * @param  $design_doc
+     * @param  $view_name
+     * @param  $map_src
+     *    Source code of the map function in Javascript
+     * @param  $reduce_src
+     *    Source code of the reduce function  in Javascript (optional)
+     * @return void
+     */
+    function save_view($design_doc, $view_name, $map_src, $reduce_src = null) {
+        $obj = new stdClass();
+        $obj->_id = "_design/" . urlencode($design_doc);
+        $view_name = urlencode($view_name);
+        $obj->views->$view_name->map = $map_src;
+        if (!empty($reduce_src)) {
+            $obj->views->$view_name->reduce = $reduce_src;
+        }
+
+        // allow safe updates (even if slightly slower due to extra: rev-detection check).
+        return $this->save($obj, true);
+    }
+
+    /**
+     * Create a new view or update an existing one.
+     *
+     * @param  $design_doc
+     * @param  $view_name
+     * @param  $key
+     *    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.
+     * @param  $descending
+     *    return results in descending order. Please don't forget that if you are using a startkey/endkey, when you change
+     *  order you also need to swap startkey and endkey values!
+     * 
+     * @return void
+     */
+    function get_view($design_doc, $view_name, $key = null, $descending = false, $limit = false, $reduce = null, $startdocid = null) {
+        $id = "_design/" . urlencode($design_doc);
+        $view_name = urlencode($view_name);
+        $id .= "/_view/$view_name";
+
+        $data = array();
+        if (!empty($key)) {
+            if (is_string($key)) {
+                $data = "key=" . '"' . $key . '"';
+            } elseif (is_array($key)) {
+                list($startkey, $endkey) = $key;
+                $data = "startkey=" . '"' . $startkey . '"&' . "endkey=" . '"' . $endkey . '"';
+            }
+
+            if ($descending) {
+                $data .= "&descending=true";
+            }
+            if ($startdocid != null) {
+                $data .= "&startkey_docid='$startdocid'";
+            }
+            if ($reduce != null) {
+                if ($reduce == true) {
+                    $data .= "&reduce=true";
+                } else {
+                    $data .= "&reduce=false";
+                }
+            }
+            if ($limit) {
+                $data .= "&limit=" . $limit;
+            }
+        }
+
+
+
+        if (empty($id)) {
+            throw new SetteeWrongInputException("Error: Can't retrieve a document without a uuid.");
+        }
+
+        $full_uri = $this->dbname . "/" . $this->safe_urlencode($id);
+
+        $full_uri = str_replace("%253Fgroup%253D", "?group=", $full_uri);
+        $full_uri = str_replace("%253Flimit%253D", "?limit=", $full_uri);
+        $ret = $this->rest_client->http_get($full_uri, $data);
+        //$ret['decoded'] = str_replace("?k","&k",$ret['decoded']);
+        return $ret['decoded'];
+    }
+
+    /**
+     * @param  $id
+     * @return
+     *    return a properly url-encoded id.
+     */
+    private function safe_urlencode($id) {
+        //-- System views like _design can have "/" in their URLs.
+        $id = rawurlencode($id);
+        if (substr($id, 0, 1) == '_') {
+            $id = str_replace('%2F', '/', $id);
+        }
+        return $id;
+    }
+
+    /** Getter for a database name */
+    function get_name() {
+        return $this->dbname;
+    }
 
 }

--- a/documents/index.php
+++ b/documents/index.php
@@ -1,9 +1,9 @@
 <?php
-
 include('template.inc.php');
 include_header_documents("");
 include_once('../include/common.inc.php');
 $endkey = (isset($_REQUEST['end_key']) ? $_REQUEST['end_key'] : '9999-99-99');
+$enddocid = (isset($_REQUEST['end_docid']) ? $_REQUEST['end_docid'] : null);
 ?>
 <div class="headline">Read all the information released by Australian Federal Government agencies under the FOI Act in one place!</div>
 <a style='float:right' href="rss.xml.php"><img src="img/feed-icon-14x14.png" alt="RSS Icon"/> All Agencies RSS Feed</a><br>
@@ -16,18 +16,20 @@
 }
 $foidocsdb = $server->get_db('disclosr-foidocuments');
 try {
-    $rows = $foidocsdb->get_view("app", "byDate", Array($endkey, '0000-00-00'), true, 20)->rows;
+    $rows = $foidocsdb->get_view("app", "byDate", Array($endkey, '0000-00-00'), true, 20,null, $enddocid)->rows;
     if ($rows) {
         foreach ($rows as $key => $row) {
             echo displayLogEntry($row, $idtoname);
-		if (!isset($startkey)) $startkey =  $row->key;
+            if (!isset($startkey))
+                $startkey = $row->key;
             $endkey = $row->key;
+            $enddocid = $row->value->_id;
         }
     }
 } catch (SetteeRestClientException $e) {
     setteErrorHandler($e);
 }
-echo "<a class='btn btn-large btn-primary' href='?end_key=$endkey' style='float:right;'>next page <i class='icon-circle-arrow-right icon-white'></i></a>";
+echo "<a class='btn btn-large btn-primary' href='?end_key=$endkey&amp;end_docid=$enddocid' style='float:right;'>next page <i class='icon-circle-arrow-right icon-white'></i></a>";
 include_footer_documents();
 ?>