autoembed.js

function AutoEmbed() {

    AE_TAG = '<!-- Generated by AutoEmbed-JS (http://autoembed.com) -->';

    var self = this;
    self._media_id = null;
    self._stub = null;
    self._object_attribs = null;
    self._object_params = null;

    /**
     * Parse given URL
     *
     * @param $url string - href to check for embeded video
     *
     * @return boolean - whether or not the url contains valid/supported video
     */
    self.parseUrl = function (url) {

        for (var stubKey in AutoEmbed_stubs) {
            var stub = AutoEmbed_stubs[stubKey];
            var regExp = new RegExp(stub['url-match'], "im");
            var match = url.match(regExp);
            if (match) {
                self._stub = stub;

                if (stub['fetch-match']) {
                    return _parseLink(url);
                } else {
                    self._media_id = match;
                    _setDefaultParams();
                    return true;
                }
            }
        }

        delete(stub);
        return false;
    };

    /**
     * Returns info about the stub
     *
     * @param string $property - (optional) the specific
     *           property of the stub to be returned.  If
     *           ommited, array of all properties are returned
     *
     * @return mixed - details about the stub
     */
    this.getStub = function (property) {
        if (typeof property === "undefined") {
            property = null;
        }

        return property ? self._stub[property] : self._stub;
    };

    /**
     * Return object params about the video metadata
     *
     * @return array - object params
     */
    this.getObjectParams = function () {
        return self._object_params;
    };

    /**
     * Return object attribute
     *
     * @return array - object attribute
     */
    this.getObjectAttribs = function () {
        return self._object_attribs;
    };

    /**
     * Convert the url to an embedable tag
     *
     * return string - the embed html
     */
    this.getEmbedCode = function () {
        if (self._stub['iframe-player']) {
            return _buildiFrame();
        }
        return _buildObject();
    };

    /**
     * Return a thumbnail for the embeded video
     *
     * return string - the thumbnail href
     */
    this.getImageURL = function () {
        if (!self._stub['image-src']) return false;

        var thumb = self._stub['image-src'];
        for (var i = 1; i <= self._media_id.length; i++) {
            thumb = thumb.replace('$' + i, self._media_id[i - 1]);
        }

        return thumb;
    };

    /**
     * Set the height of the object
     *
     * @param mixed - height to set the object to
     *
     * @return boolean - true if the value was set, false
     *                   if parseURL hasn't been called yet
     */
    this.setHeight = function (height) {
        return this.setObjectAttrib('height', height);
    };

    /**
     * Set the width of the object
     *
     * @param mixed - width to set the object to
     *
     * @return boolean - true if the value was set, false
     *                   if parseURL hasn't been called yet
     */
    this.setWidth = function (width) {
        return this.setObjectAttrib('width', width);
    };

    /**
     * Override a default param value for both the object
     * and flash param list
     *
     * @param $param mixed - the name of the param to be set
     *                       or an array of multiple params to set
     * @param $value string - (optional) the value to set the param to
     *                        if only one param is being set
     *
     * @return boolean - true if the value was set, false
     *                   if parseURL hasn't been called yet
     */
    this.setParam = function (param, value) {
        if (typeof value === "undefined") {
            value = null;
        }

        return this.setObjectParam(param, value);
    };

    /**
     * Override a default object param value
     *
     * @param $param mixed - the name of the param to be set
     *                       or an array of multiple params to set
     * @param $value string - (optional) the value to set the param to
     *                        if only one param is being set
     *
     * @return boolean - true if the value was set, false
     *                   if parseURL hasn't been called yet
     */
    this.setObjectParam = function (param, value) {
        if (typeof value === "undefined") {
            value = null;
        }

        if (self._object_params instanceof Array) return false;

        if (param instanceof Array) {
            for (var p in param) {
                self._object_params[p] = param[p];
            }
        } else {
            self._object_params[param] = value;
        }

        return true;
    };

    /**
     * Override a default object attribute value
     *
     * @param $param mixed - the name of the attribute to be set
     *                       or an array of multiple attribs to be set
     * @param $value string - (optional) the value to set the param to
     *                        if only one param is being set
     *
     * @return boolean - true if the value was set, false
     *                   if parseURL hasn't been called yet
     */
    this.setObjectAttrib = function (param, value) {
        if (typeof value === "undefined") {
            value = null;
        }

        if (self._object_attribs instanceof Array) {
            return false;
        }

        if (param instanceof Array) {
            for (var p in param) {
                self._object_attribs[p] = param[p];
            }
        } else {
            self._object_attribs[param] = value;
        }

        return true;
    };

    /**
     * Attempt to parse the embed id from a given URL
     */

    function _parseLink(url) {
        //FIXME: This is a file read operation. Need to figure out how to achieve this in javascript
        //API doc: http://in1.php.net/manual/en/function.file-get-contents.php
        //var source = file_get_contents(url).replace('/[^(\x20-\x7F)]*/', '');
        var source = url.replace('/[^(\x20-\x7F)]*/', '');

        var regExp = new RegExp(self._stub['fetch-match'], "im");
        var match = source.match(regExp);
        if (match) {
            self._media_id = match;
            _setDefaultParams();
            return true;
        }

        return false;
    }

    /**
     * Build a generic object skeleton
     */
    function _buildObject() {

        // console.log("--- _buildObject() call --- ")
        var object_attribs = '';
        var object_params = '';

        for (var param in self._object_attribs) {
            var value = self._object_attribs[param];
            object_attribs += '  ' + param + '="' + value + '"';
        }

        for (var param in self._object_params) {
            var value = self._object_params[param];
            object_params += '<param name="' + param + '" value="' + value + '" />';
        }

        str = "<object " + object_attribs + "> " + object_params + " " + AutoEmbed.AE_TAG + "</object>"

        for (var i = 1; i <= self._media_id.length; i++) {
            str = str.replace('$' + i, self._media_id[i - 1]);
        }

        return str;
    }

    /**
     * Build an iFrame player
     */
    function _buildiFrame() {

        // console.log("--- _buildiFrame() call --- ")

        var source = self._stub['iframe-player'];

        for (var i = 1; i <= self._media_id.length; i++) {
            source = source.replace('$' + i, self._media_id[i - 1]);
        }

        var width = self._object_attribs['width'];
        var height = self._object_attribs['height'];

        return '<iframe type="text/html" width="' + width + '" height="' + height + '" src="' + source + '" frameborder="0"></iframe>';
    }

    /**
     * Set the default params for the type of
     * stub we are working with
     */
    function _setDefaultParams() {

        var source = self._stub['embed-src'];
        var flashvars = self._stub['flashvars'] ? self._stub['flashvars'] : null;

        for (var i = 1; i <= self._media_id.length; i++) {
            source = source.replace(new RegExp('$' + i, 'gim'), self._media_id[i - 1]);
            flashvars = flashvars == null ? null : flashvars.replace(new RegExp('$' + i, 'gim'), self._media_id[i - 1]);
        }

        source = htmlspecialchars(source);
        flashvars = flashvars == null ? null : htmlspecialchars(flashvars);

        self._object_params = {
            'movie': source,
            'quality': 'high',
            'allowFullScreen': 'true',
            'allowScriptAccess': 'always',
            'pluginspage': 'http://www.macromedia.com/go/getflashplayer',
            'autoplay': 'false',
            'autostart': 'false',
            'flashvars': flashvars,
        };

        self._object_attribs = {
            'type': 'application/x-shockwave-flash',
            'data': source,
            'width': self._stub['embed-width'],
            'height': self._stub['embed-height']
        };
    }

}