photos.php

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            $location->setType('entry');
            $uri = $location->getQueryUrl();
        } else if ($location instanceof Zend_Gdata_Query) {
            $uri = $location->getQueryUrl();
        } else {
            $uri = $location;
        }
        return parent::getEntry($uri, 'Zend_Gdata_Photos_PhotoEntry');
    }

    /**
     * Retreive a single TagEntry object.
     *
     * @param mixed $location The location for the feed, as a URL or Query.
     * @return Zend_Gdata_Photos_TagEntry
     * @throws Zend_Gdata_App_Exception
     * @throws Zend_Gdata_App_HttpException
     */
    public function getTagEntry($location)
    {
        if ($location === null) {
            require_once 'Zend/Gdata/App/InvalidArgumentException.php';
            throw new Zend_Gdata_App_InvalidArgumentException(
                    'Location must not be null');
        } else if ($location instanceof Zend_Gdata_Photos_UserQuery) {
            $location->setType('entry');
            $uri = $location->getQueryUrl();
        } else if ($location instanceof Zend_Gdata_Query) {
            $uri = $location->getQueryUrl();
        } else {
            $uri = $location;
        }
        return parent::getEntry($uri, 'Zend_Gdata_Photos_TagEntry');
    }

    /**
     * Retreive a single CommentEntry object.
     *
     * @param mixed $location The location for the feed, as a URL or Query.
     * @return Zend_Gdata_Photos_CommentEntry
     * @throws Zend_Gdata_App_Exception
     * @throws Zend_Gdata_App_HttpException
     */
    public function getCommentEntry($location)
    {
        if ($location === null) {
            require_once 'Zend/Gdata/App/InvalidArgumentException.php';
            throw new Zend_Gdata_App_InvalidArgumentException(
                    'Location must not be null');
        } else if ($location instanceof Zend_Gdata_Photos_UserQuery) {
            $location->setType('entry');
            $uri = $location->getQueryUrl();
        } else if ($location instanceof Zend_Gdata_Query) {
            $uri = $location->getQueryUrl();
        } else {
            $uri = $location;
        }
        return parent::getEntry($uri, 'Zend_Gdata_Photos_CommentEntry');
    }

    /**
     * Create a new album from a AlbumEntry.
     * 
     * @param Zend_Gdata_Photos_AlbumEntry $album The album entry to 
     *          insert.
     * @param string $url (optional) The URI that the album should be 
     *          uploaded to. If null, the default album creation URI for 
     *          this domain will be used.
     * @return Zend_Gdata_Photos_AlbumEntry The inserted album entry as 
     *          returned by the server.
     * @throws Zend_Gdata_App_Exception
     * @throws Zend_Gdata_App_HttpException
     */
    public function insertAlbumEntry($album, $uri = null)
    {
        if ($uri === null) {
            $uri = self::PICASA_BASE_FEED_URI . '/' .
                self::DEFAULT_PROJECTION . '/' . self::USER_PATH . '/' .
                self::DEFAULT_USER;
        }
        $newEntry = $this->insertEntry($album, $uri, 'Zend_Gdata_Photos_AlbumEntry');
        return $newEntry;
    }

    /**
     * Create a new photo from a PhotoEntry.
     * 
     * @param Zend_Gdata_Photos_PhotoEntry $photo The photo to insert.
     * @param string $url The URI that the photo should be uploaded 
     *          to. Alternatively, an AlbumEntry can be provided and the 
     *          photo will be added to that album.
     * @return Zend_Gdata_Photos_PhotoEntry The inserted photo entry 
     *          as returned by the server.
     * @throws Zend_Gdata_App_Exception
     * @throws Zend_Gdata_App_HttpException
     */
    public function insertPhotoEntry($photo, $uri = null)
    {
        if ($uri instanceof Zend_Gdata_Photos_AlbumEntry) {
            $uri = $uri->getLink(self::FEED_LINK_PATH)->href;
        }
        if ($uri === null) {
            require_once 'Zend/Gdata/App/InvalidArgumentException.php';
            throw new Zend_Gdata_App_InvalidArgumentException(
                    'URI must not be null');
        }
        $newEntry = $this->insertEntry($photo, $uri, 'Zend_Gdata_Photos_PhotoEntry');
        return $newEntry;
    }
    
    /**
     * Create a new tag from a TagEntry.
     * 
     * @param Zend_Gdata_Photos_TagEntry $tag The tag entry to insert.
     * @param string $url The URI where the tag should be 
     *          uploaded to. Alternatively, a PhotoEntry can be provided and 
     *          the tag will be added to that photo.
     * @return Zend_Gdata_Photos_TagEntry The inserted tag entry as returned
     *          by the server.
     * @throws Zend_Gdata_App_Exception
     * @throws Zend_Gdata_App_HttpException
     */
    public function insertTagEntry($tag, $uri = null)
    {
        if ($uri instanceof Zend_Gdata_Photos_PhotoEntry) {
            $uri = $uri->getLink(self::FEED_LINK_PATH)->href;
        }
        if ($uri === null) {
            require_once 'Zend/Gdata/App/InvalidArgumentException.php';
            throw new Zend_Gdata_App_InvalidArgumentException(
                    'URI must not be null');
        }
        $newEntry = $this->insertEntry($tag, $uri, 'Zend_Gdata_Photos_TagEntry');
        return $newEntry;
    }

    /**
     * Create a new comment from a CommentEntry.
     * 
     * @param Zend_Gdata_Photos_CommentEntry $comment The comment entry to
     *          insert.
     * @param string $url The URI where the comment should be uploaded to.
     *          Alternatively, a PhotoEntry can be provided and 
     *          the comment will be added to that photo.
     * @return Zend_Gdata_Photos_CommentEntry The inserted comment entry
     *          as returned by the server.
     * @throws Zend_Gdata_App_Exception
     * @throws Zend_Gdata_App_HttpException
     */
    public function insertCommentEntry($comment, $uri = null)
    {
        if ($uri instanceof Zend_Gdata_Photos_PhotoEntry) {
            $uri = $uri->getLink(self::FEED_LINK_PATH)->href;
        }
        if ($uri === null) {
            require_once 'Zend/Gdata/App/InvalidArgumentException.php';
            throw new Zend_Gdata_App_InvalidArgumentException(
                    'URI must not be null');
        }
        $newEntry = $this->insertEntry($comment, $uri, 'Zend_Gdata_Photos_CommentEntry');
        return $newEntry;
    }

    /**
     * Delete an AlbumEntry.
     * 
     * @param Zend_Gdata_Photos_AlbumEntry $album The album entry to 
     *          delete.
     * @param boolean $catch Whether to catch an exception when
     *            modified and re-delete or throw
     * @return void.
     * @throws Zend_Gdata_App_Exception
     * @throws Zend_Gdata_App_HttpException
     */
    public function deleteAlbumEntry($album, $catch)
    {
        if ($catch) {
            try {
                $this->delete($album);
            } catch (Zend_Gdata_App_HttpException $e) {
                if ($e->getResponse()->getStatus() === 409) {
                    $entry = new Zend_Gdata_Photos_AlbumEntry($e->getResponse()->getBody());
                    $this->delete($entry->getLink('edit')->href);
                } else {
                    throw $e;
                }
            }
        } else {
            $this->delete($album);
        }
    }

    /**
     * Delete a PhotoEntry.
     * 
     * @param Zend_Gdata_Photos_PhotoEntry $photo The photo entry to 
     *          delete.
     * @param boolean $catch Whether to catch an exception when
     *            modified and re-delete or throw
     * @return void.
     * @throws Zend_Gdata_App_Exception
     * @throws Zend_Gdata_App_HttpException
     */
    public function deletePhotoEntry($photo, $catch)
    {
        if ($catch) {
            try {
                $this->delete($photo);
            } catch (Zend_Gdata_App_HttpException $e) {
                if ($e->getResponse()->getStatus() === 409) {
                    $entry = new Zend_Gdata_Photos_PhotoEntry($e->getResponse()->getBody());
                    $this->delete($entry->getLink('edit')->href);
                } else {
                    throw $e;
                }
            }
        } else {
            $this->delete($photo);
        }
    }
    
    /**
     * Delete a CommentEntry.
     * 
     * @param Zend_Gdata_Photos_CommentEntry $comment The comment entry to 
     *          delete.
     * @param boolean $catch Whether to catch an exception when
     *            modified and re-delete or throw
     * @return void.
     * @throws Zend_Gdata_App_Exception
     * @throws Zend_Gdata_App_HttpException
     */
    public function deleteCommentEntry($comment, $catch)
    {
        if ($catch) {
            try {
                $this->delete($comment);
            } catch (Zend_Gdata_App_HttpException $e) {
                if ($e->getResponse()->getStatus() === 409) {
                    $entry = new Zend_Gdata_Photos_CommentEntry($e->getResponse()->getBody());
                    $this->delete($entry->getLink('edit')->href);
                } else {
                    throw $e;
                }
            }
        } else {
            $this->delete($comment);
        }
    }

    /**
     * Delete a TagEntry.
     * 
     * @param Zend_Gdata_Photos_TagEntry $tag The tag entry to 
     *          delete.
     * @param boolean $catch Whether to catch an exception when
     *            modified and re-delete or throw
     * @return void.
     * @throws Zend_Gdata_App_Exception
     * @throws Zend_Gdata_App_HttpException
     */
    public function deleteTagEntry($tag, $catch)
    {
        if ($catch) {
            try {
                $this->delete($tag);
            } catch (Zend_Gdata_App_HttpException $e) {
                if ($e->getResponse()->getStatus() === 409) {
                    $entry = new Zend_Gdata_Photos_TagEntry($e->getResponse()->getBody());
                    $this->delete($entry->getLink('edit')->href);
                } else {
                    throw $e;
                }
            }
        } else {
            $this->delete($tag);
        }
    }

}