slideshare.php

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    /**
     * Uploads the specified Slide show the the server
     *
     * @param Zend_Service_SlideShare_SlideShow $ss The slide show object representing the slide show to upload
     * @param boolean $make_src_public Determines if the the slide show's source file is public or not upon upload
     * @return Zend_Service_SlideShare_SlideShow The passed Slide show object, with the new assigned ID provided
     */
    public function uploadSlideShow(Zend_Service_SlideShare_SlideShow $ss, $make_src_public = true)
    {

        $timestamp = time();

        $params = array('api_key' => $this->getApiKey(),
                        'ts' => $timestamp,
                        'hash' => sha1($this->getSharedSecret().$timestamp),
                        'username' => $this->getUserName(),
                        'password' => $this->getPassword(),
                        'slideshow_title' => $ss->getTitle());

        $description = $ss->getDescription();
        $tags = $ss->getTags();

        $filename = $ss->getFilename();

        if(!file_exists($filename) || !is_readable($filename)) {
            throw new Zend_Service_SlideShare_Exception("Specified Slideshow for upload not found or unreadable");
        }

        if(!empty($description)) {
            $params['slideshow_description'] = $description;
        } else {
            $params['slideshow_description'] = "";
        }

        if(!empty($tags)) {
            $tmp = array();
            foreach($tags as $tag) {
                $tmp[] = "\"$tag\"";
            }
            $params['slideshow_tags'] = implode(' ', $tmp);
        } else {
            $params['slideshow_tags'] = "";
        }


        $client = $this->getHttpClient();
        $client->setUri(self::SERVICE_UPLOAD_URI);
        $client->setParameterPost($params);
        $client->setFileUpload($filename, "slideshow_srcfile");

        try {
            $response = $client->request('POST');
        } catch(Zend_Http_Client_Exception $e) {
            throw new Zend_Service_SlideShare_Exception("Service Request Failed: {$e->getMessage()}");
        }

        $sxe = simplexml_load_string($response->getBody());

        if($sxe->getName() == "SlideShareServiceError") {
            $message = (string)$sxe->Message[0];
            list($code, $error_str) = explode(':', $message);
            throw new Zend_Service_SlideShare_Exception(trim($error_str), $code);
        }

        if(!$sxe->getName() == "SlideShowUploaded") {
            throw new Zend_Service_SlideShare_Exception("Unknown XML Respons Received");
        }

        $ss->setId((int)(string)$sxe->SlideShowID);

        return $ss;
    }

    /**
     * Retrieves a slide show's information based on slide show ID
     *
     * @param int $ss_id The slide show ID
     * @return Zend_Service_SlideShare_SlideShow the Slideshow object
     */
    public function getSlideShow($ss_id)
    {
        $timestamp = time();

        $params = array('api_key' => $this->getApiKey(),
                        'ts' => $timestamp,
                        'hash' => sha1($this->getSharedSecret().$timestamp),
                        'slideshow_id' => $ss_id);

        $cache = $this->getCacheObject();

        $cache_key = md5("__zendslideshare_cache_$ss_id");

        if(!$retval = $cache->load($cache_key)) {
            $client = $this->getHttpClient();

            $client->setUri(self::SERVICE_GET_SHOW_URI);
            $client->setParameterPost($params);

            try {
                $response = $client->request('POST');
            } catch(Zend_Http_Client_Exception $e) {
                throw new Zend_Service_SlideShare_Exception("Service Request Failed: {$e->getMessage()}");
            }

            $sxe = simplexml_load_string($response->getBody());

            if($sxe->getName() == "SlideShareServiceError") {
                $message = (string)$sxe->Message[0];
                list($code, $error_str) = explode(':', $message);
                throw new Zend_Service_SlideShare_Exception(trim($error_str), $code);
            }

            if(!$sxe->getName() == 'Slideshows') {
                throw new Zend_Service_SlideShare_Exception('Unknown XML Repsonse Received');
            }

            $retval = $this->_slideShowNodeToObject(clone $sxe->Slideshow[0]);

            $cache->save($retval, $cache_key);
        }

        return $retval;
    }

    /**
     * Retrieves an array of slide shows for a given username
     *
     * @param string $username The username to retrieve slide shows from
     * @param int $offset The offset of the list to start retrieving from
     * @param int $limit The maximum number of slide shows to retrieve
     * @return array An array of Zend_Service_SlideShare_SlideShow objects
     */
    public function getSlideShowsByUsername($username, $offset = null, $limit = null)
    {
        return $this->_getSlideShowsByType('username_for', $username, $offset, $limit);
    }

    /**
     * Retrieves an array of slide shows based on tag
     *
     * @param string $tag The tag to retrieve slide shows with
     * @param int $offset The offset of the list to start retrieving from
     * @param int $limit The maximum number of slide shows to retrieve
     * @return array An array of Zend_Service_SlideShare_SlideShow objects
     */
    public function getSlideShowsByTag($tag, $offset = null, $limit = null)
    {

        if(is_array($tag)) {
            $tmp = array();
            foreach($tag as $t) {
                $tmp[] = "\"$t\"";
            }

            $tag = implode(" ", $tmp);
        }

        return $this->_getSlideShowsByType('tag', $tag, $offset, $limit);
    }

    /**
     * Retrieves an array of slide shows based on group name
     *
     * @param string $group The group name to retrieve slide shows for
     * @param int $offset The offset of the list to start retrieving from
     * @param int $limit The maximum number of slide shows to retrieve
     * @return array An array of Zend_Service_SlideShare_SlideShow objects
     */
    public function getSlideShowsByGroup($group, $offset = null, $limit = null)
    {
        return $this->_getSlideShowsByType('group_name', $group, $offset, $limit);
    }

    /**
     * Retrieves Zend_Service_SlideShare_SlideShow object arrays based on the type of
     * list desired
     *
     * @param string $key The type of slide show object to retrieve
     * @param string $value The specific search query for the slide show type to look up
     * @param int $offset The offset of the list to start retrieving from
     * @param int $limit The maximum number of slide shows to retrieve
     * @return array An array of Zend_Service_SlideShare_SlideShow objects
     */
    protected function _getSlideShowsByType($key, $value, $offset = null, $limit = null)
    {

        $key = strtolower($key);

        switch($key) {
            case 'username_for':
                $responseTag = 'User';
                $queryUri = self::SERVICE_GET_SHOW_BY_USER_URI;
                break;
            case 'group_name':
                $responseTag = 'Group';
                $queryUri = self::SERVICE_GET_SHOW_BY_GROUP_URI;
                break;
            case 'tag':
                $responseTag = 'Tag';
                $queryUri = self::SERVICE_GET_SHOW_BY_TAG_URI;
                break;
            default:
                throw new Zend_Service_SlideShare_Exception("Invalid SlideShare Query");
        }

        $timestamp = time();

        $params = array('api_key' => $this->getApiKey(),
                        'ts' => $timestamp,
                        'hash' => sha1($this->getSharedSecret().$timestamp),
                        $key => $value);

        if(!is_null($offset)) {
            $params['offset'] = (int)$offset;
        }

        if(!is_null($limit)) {
            $params['limit'] = (int)$limit;
        }

        $cache = $this->getCacheObject();

        $cache_key = md5($key.$value.$offset.$limit);

        if(!$retval = $cache->load($cache_key)) {

            $client = $this->getHttpClient();

            $client->setUri($queryUri);
            $client->setParameterPost($params);

            try {
                $response = $client->request('POST');
            } catch(Zend_Http_Client_Exception $e) {
                throw new Zend_Service_SlideShare_Exception("Service Request Failed: {$e->getMessage()}");
            }

            $sxe = simplexml_load_string($response->getBody());

            if($sxe->getName() == "SlideShareServiceError") {
                $message = (string)$sxe->Message[0];
                list($code, $error_str) = explode(':', $message);
                throw new Zend_Service_SlideShare_Exception(trim($error_str), $code);
            }

            if(!$sxe->getName() == $responseTag) {
                throw new Zend_Service_SlideShare_Exception('Unknown or Invalid XML Repsonse Received');
            }

            $retval = array();

            foreach($sxe->children() as $node) {
                if($node->getName() == 'Slideshow') {
                    $retval[] = $this->_slideShowNodeToObject($node);
                }
            }

            $cache->save($retval, $cache_key);
        }

        return $retval;
    }

    /**
     * Converts a SimpleXMLElement object representing a response from the service
     * into a Zend_Service_SlideShare_SlideShow object
     *
     * @param SimpleXMLElement $node The input XML from the slideshare.net service
     * @return Zend_Service_SlideShare_SlideShow The resulting object
     */
    protected function _slideShowNodeToObject(SimpleXMLElement $node)
    {

        if($node->getName() == 'Slideshow') {

            $ss = new Zend_Service_SlideShare_SlideShow();

            $ss->setId((string)$node->ID);
            $ss->setDescription((string)$node->Description);
            $ss->setEmbedCode((string)$node->EmbedCode);
            $ss->setNumViews((string)$node->Views);
            $ss->setPermaLink((string)$node->Permalink);
            $ss->setStatus((string)$node->Status);
            $ss->setStatusDescription((string)$node->StatusDescription);

            foreach(explode(",", (string)$node->Tags) as $tag) {

                if(!in_array($tag, $ss->getTags())) {
                    $ss->addTag($tag);
                }
            }

            $ss->setThumbnailUrl((string)$node->Thumbnail);
            $ss->setTitle((string)$node->Title);
            $ss->setLocation((string)$node->Location);
            $ss->setTranscript((string)$node->Transcript);

            return $ss;

        }

        throw new Zend_Service_SlideShare_Exception("Was not provided the expected XML Node for processing");
    }
}