/**
 * @license Copyright (c) 2003-2013, CKSource - Frederico Knabben. All rights reserved.
 * For licensing, see LICENSE.md or http://ckeditor.com/license
 */

/**
 * @fileOverview The "filebrowser" plugin that adds support for file uploads and
 *               browsing.
 *
 * When a file is uploaded or selected inside the file browser, its URL is
 * inserted automatically into a field defined in the <code>filebrowser</code>
 * attribute. In order to specify a field that should be updated, pass the tab ID and
 * the element ID, separated with a colon.<br /><br />
 *
 * <strong>Example 1: (Browse)</strong>
 *
 * <pre>
 * {
 *     type : 'button',
 *     id : 'browse',
 *     filebrowser : 'tabId:elementId',
 *     label : editor.lang.common.browseServer
 * }
 * </pre>
 *
 * If you set the <code>filebrowser</code> attribute for an element other than
 * the <code>fileButton</code>, the <code>Browse</code> action will be triggered.<br /><br />
 *
 * <strong>Example 2: (Quick Upload)</strong>
 *
 * <pre>
 * {
 *     type : 'fileButton',
 *     id : 'uploadButton',
 *     filebrowser : 'tabId:elementId',
 *     label : editor.lang.common.uploadSubmit,
 *     'for' : [ 'upload', 'upload' ]
 * }
 * </pre>
 *
 * If you set the <code>filebrowser</code> attribute for a <code>fileButton</code>
 * element, the <code>QuickUpload</code> action will be executed.<br /><br />
 *
 * The filebrowser plugin also supports more advanced configuration performed through
 * a JavaScript object.
 *
 * The following settings are supported:
 *
 * <ul>
 * <li><code>action</code> &ndash; <code>Browse</code> or <code>QuickUpload</code>.</li>
 * <li><code>target</code> &ndash; the field to update in the <code><em>tabId:elementId</em></code> format.</li>
 * <li><code>params</code> &ndash; additional arguments to be passed to the server connector (optional).</li>
 * <li><code>onSelect</code> &ndash; a function to execute when the file is selected/uploaded (optional).</li>
 * <li><code>url</code> &ndash; the URL to be called (optional).</li>
 * </ul>
 *
 * <strong>Example 3: (Quick Upload)</strong>
 *
 * <pre>
 * {
 *     type : 'fileButton',
 *     label : editor.lang.common.uploadSubmit,
 *     id : 'buttonId',
 *     filebrowser :
 *     {
 *         action : 'QuickUpload', // required
 *         target : 'tab1:elementId', // required
 *         params : // optional
 *         {
 *             type : 'Files',
 *             currentFolder : '/folder/'
 *         },
 *         onSelect : function( fileUrl, errorMessage ) // optional
 *         {
 *             // Do not call the built-in selectFuntion.
 *             // return false;
 *         }
 *     },
 *     'for' : [ 'tab1', 'myFile' ]
 * }
 * </pre>
 *
 * Suppose you have a file element with an ID of <code>myFile</code>, a text
 * field with an ID of <code>elementId</code> and a <code>fileButton</code>.
 * If the <code>filebowser.url</code> attribute is not specified explicitly,
 * the form action will be set to <code>filebrowser[<em>DialogWindowName</em>]UploadUrl</code>
 * or, if not specified, to <code>filebrowserUploadUrl</code>. Additional parameters
 * from the <code>params</code> object will be added to the query string. It is
 * possible to create your own <code>uploadHandler</code> and cancel the built-in
 * <code>updateTargetElement</code> command.<br /><br />
 *
 * <strong>Example 4: (Browse)</strong>
 *
 * <pre>
 * {
 *     type : 'button',
 *     id : 'buttonId',
 *     label : editor.lang.common.browseServer,
 *     filebrowser :
 *     {
 *         action : 'Browse',
 *         url : '/ckfinder/ckfinder.html&amp;type=Images',
 *         target : 'tab1:elementId'
 *     }
 * }
 * </pre>
 *
 * In this example, when the button is pressed, the file browser will be opened in a
 * popup window. If you do not specify the <code>filebrowser.url</code> attribute,
 * <code>filebrowser[<em>DialogName</em>]BrowseUrl</code> or
 * <code>filebrowserBrowseUrl</code> will be used. After selecting a file in the file
 * browser, an element with an ID of <code>elementId</code> will be updated. Just
 * like in the third example, a custom <code>onSelect</code> function may be defined.
 */

(function() {
    // Adds (additional) arguments to given url.
    //
    // @param {String}
    //            url The url.
    // @param {Object}
    //            params Additional parameters.
    function addQueryString( url, params ) {
        var queryString = [];

        if ( !params )
            return url;
        else {
            for ( var i in params )
                queryString.push( i + "=" + encodeURIComponent( params[ i ] ) );
        }

        return url + ( ( url.indexOf( "?" ) != -1 ) ? "&" : "?" ) + queryString.join( "&" );
    }

    // Make a string's first character uppercase.
    //
    // @param {String}
    //            str String.
    function ucFirst( str ) {
        str += '';
        var f = str.charAt( 0 ).toUpperCase();
        return f + str.substr( 1 );
    }

    // The onlick function assigned to the 'Browse Server' button. Opens the
    // file browser and updates target field when file is selected.
    //
    // @param {CKEDITOR.event}
    //            evt The event object.
    function browseServer( evt ) {
        var dialog = this.getDialog();
        var editor = dialog.getParentEditor();

        editor._.filebrowserSe = this;

        var width = editor.config[ 'filebrowser' + ucFirst( dialog.getName() ) + 'WindowWidth' ] || editor.config.filebrowserWindowWidth || '80%';
        var height = editor.config[ 'filebrowser' + ucFirst( dialog.getName() ) + 'WindowHeight' ] || editor.config.filebrowserWindowHeight || '70%';

        var params = this.filebrowser.params || {};
        params.CKEditor = editor.name;
        params.CKEditorFuncNum = editor._.filebrowserFn;
        if ( !params.langCode )
            params.langCode = editor.langCode;

        var url = addQueryString( this.filebrowser.url, params );
        // TODO: V4: Remove backward compatibility (#8163).
        editor.popup( url, width, height, editor.config.filebrowserWindowFeatures || editor.config.fileBrowserWindowFeatures );
    }

    // The onlick function assigned to the 'Upload' button. Makes the final
    // decision whether form is really submitted and updates target field when
    // file is uploaded.
    //
    // @param {CKEDITOR.event}
    //            evt The event object.
    function uploadFile( evt ) {
        var dialog = this.getDialog();
        var editor = dialog.getParentEditor();

        editor._.filebrowserSe = this;

        // If user didn't select the file, stop the upload.
        if ( !dialog.getContentElement( this[ 'for' ][ 0 ], this[ 'for' ][ 1 ] ).getInputElement().$.value )
            return false;

        if ( !dialog.getContentElement( this[ 'for' ][ 0 ], this[ 'for' ][ 1 ] ).getAction() )
            return false;

        return true;
    }

    // Setups the file element.
    //
    // @param {CKEDITOR.ui.dialog.file}
    //            fileInput The file element used during file upload.
    // @param {Object}
    //            filebrowser Object containing filebrowser settings assigned to
    //            the fileButton associated with this file element.
    function setupFileElement( editor, fileInput, filebrowser ) {
        var params = filebrowser.params || {};
        params.CKEditor = editor.name;
        params.CKEditorFuncNum = editor._.filebrowserFn;
        if ( !params.langCode )
            params.langCode = editor.langCode;

        fileInput.action = addQueryString( filebrowser.url, params );
        fileInput.filebrowser = filebrowser;
    }

    // Traverse through the content definition and attach filebrowser to
    // elements with 'filebrowser' attribute.
    //
    // @param String
    //            dialogName Dialog name.
    // @param {CKEDITOR.dialog.definitionObject}
    //            definition Dialog definition.
    // @param {Array}
    //            elements Array of {@link CKEDITOR.dialog.definition.content}
    //            objects.
    function attachFileBrowser( editor, dialogName, definition, elements ) {
        if ( !elements || !elements.length )
            return;

        var element, fileInput;

        for ( var i = elements.length; i--; ) {
            element = elements[ i ];

            if ( element.type == 'hbox' || element.type == 'vbox' || element.type == 'fieldset' )
                attachFileBrowser( editor, dialogName, definition, element.children );

            if ( !element.filebrowser )
                continue;

            if ( typeof element.filebrowser == 'string' ) {
                var fb = {
                    action: ( element.type == 'fileButton' ) ? 'QuickUpload' : 'Browse',
                    target: element.filebrowser
                };
                element.filebrowser = fb;
            }

            if ( element.filebrowser.action == 'Browse' ) {
                var url = element.filebrowser.url;
                if ( url === undefined ) {
                    url = editor.config[ 'filebrowser' + ucFirst( dialogName ) + 'BrowseUrl' ];
                    if ( url === undefined )
                        url = editor.config.filebrowserBrowseUrl;
                }

                if ( url ) {
                    element.onClick = browseServer;
                    element.filebrowser.url = url;
                    element.hidden = false;
                }
            } else if ( element.filebrowser.action == 'QuickUpload' && element[ 'for' ] ) {
                url = element.filebrowser.url;
                if ( url === undefined ) {
                    url = editor.config[ 'filebrowser' + ucFirst( dialogName ) + 'UploadUrl' ];
                    if ( url === undefined )
                        url = editor.config.filebrowserUploadUrl;
                }

                if ( url ) {
                    var onClick = element.onClick;
                    element.onClick = function( evt ) {
                        // "element" here means the definition object, so we need to find the correct
                        // button to scope the event call
                        var sender = evt.sender;
                        if ( onClick && onClick.call( sender, evt ) === false )
                            return false;

                        return uploadFile.call( sender, evt );
                    };

                    element.filebrowser.url = url;
                    element.hidden = false;
                    setupFileElement( editor, definition.getContents( element[ 'for' ][ 0 ] ).get( element[ 'for' ][ 1 ] ), element.filebrowser );
                }
            }
        }
    }

    // Updates the target element with the url of uploaded/selected file.
    //
    // @param {String}
    //            url The url of a file.
    function updateTargetElement( url, sourceElement ) {
        var dialog = sourceElement.getDialog();
        var targetElement = sourceElement.filebrowser.target || null;

        // If there is a reference to targetElement, update it.
        if ( targetElement ) {
            var target = targetElement.split( ':' );
            var element = dialog.getContentElement( target[ 0 ], target[ 1 ] );
            if ( element ) {
                element.setValue( url );
                dialog.selectPage( target[ 0 ] );
            }
        }
    }

    // Returns true if filebrowser is configured in one of the elements.
    //
    // @param {CKEDITOR.dialog.definitionObject}
    //            definition Dialog definition.
    // @param String
    //            tabId The tab id where element(s) can be found.
    // @param String
    //            elementId The element id (or ids, separated with a semicolon) to check.
    function isConfigured( definition, tabId, elementId ) {
        if ( elementId.indexOf( ";" ) !== -1 ) {
            var ids = elementId.split( ";" );
            for ( var i = 0; i < ids.length; i++ ) {
                if ( isConfigured( definition, tabId, ids[ i ] ) )
                    return true;
            }
            return false;
        }

        var elementFileBrowser = definition.getContents( tabId ).get( elementId ).filebrowser;
        return ( elementFileBrowser && elementFileBrowser.url );
    }

    function setUrl( fileUrl, data ) {
        var dialog = this._.filebrowserSe.getDialog(),
            targetInput = this._.filebrowserSe[ 'for' ],
            onSelect = this._.filebrowserSe.filebrowser.onSelect;

        if ( targetInput )
            dialog.getContentElement( targetInput[ 0 ], targetInput[ 1 ] ).reset();

        if ( typeof data == 'function' && data.call( this._.filebrowserSe ) === false )
            return;

        if ( onSelect && onSelect.call( this._.filebrowserSe, fileUrl, data ) === false )
            return;

        // The "data" argument may be used to pass the error message to the editor.
        if ( typeof data == 'string' && data )
            alert( data );

        if ( fileUrl )
            updateTargetElement( fileUrl, this._.filebrowserSe );
    }

    CKEDITOR.plugins.add( 'filebrowser', {
        requires: 'popup',
        init: function( editor, pluginPath ) {
            editor._.filebrowserFn = CKEDITOR.tools.addFunction( setUrl, editor );
            editor.on( 'destroy', function() {
                CKEDITOR.tools.removeFunction( this._.filebrowserFn );
            });
        }
    });

    CKEDITOR.on( 'dialogDefinition', function( evt ) {
        // We require filebrowser plugin to be loaded.
        if ( !evt.editor.plugins.filebrowser )
            return;

        var definition = evt.data.definition,
            element;
        // Associate filebrowser to elements with 'filebrowser' attribute.
        for ( var i = 0; i < definition.contents.length; ++i ) {
            if ( ( element = definition.contents[ i ] ) ) {
                attachFileBrowser( evt.editor, evt.data.name, definition, element.elements );
                if ( element.hidden && element.filebrowser ) {
                    element.hidden = !isConfigured( definition, element[ 'id' ], element.filebrowser );
                }
            }
        }
    });

})();

/**
 * The location of an external file browser that should be launched when the **Browse Server**
 * button is pressed. If configured, the **Browse Server** button will appear in the
 * **Link**, **Image**, and **Flash** dialog windows.
 *
 * See the [File Browser/Uploader](http://docs.cksource.com/CKEditor_3.x/Developers_Guide/File_Browser_(Uploader\)) documentation.
 *
 *        config.filebrowserBrowseUrl = '/browser/browse.php';
 *
 * @since 3.0
 * @cfg {String} [filebrowserBrowseUrl='' (empty string = disabled)]
 * @member CKEDITOR.config
 */

/**
 * The location of the script that handles file uploads.
 * If set, the **Upload** tab will appear in the **Link**, **Image**,
 * and **Flash** dialog windows.
 *
 * See the [File Browser/Uploader](http://docs.cksource.com/CKEditor_3.x/Developers_Guide/File_Browser_(Uploader\)) documentation.
 *
 *        config.filebrowserUploadUrl = '/uploader/upload.php';
 *
 * @since 3.0
 * @cfg {String} [filebrowserUploadUrl='' (empty string = disabled)]
 * @member CKEDITOR.config
 */

/**
 * The location of an external file browser that should be launched when the **Browse Server**
 * button is pressed in the **Image** dialog window.
 *
 * If not set, CKEditor will use {@link CKEDITOR.config#filebrowserBrowseUrl}.
 *
 *        config.filebrowserImageBrowseUrl = '/browser/browse.php?type=Images';
 *
 * @since 3.0
 * @cfg {String} [filebrowserImageBrowseUrl='' (empty string = disabled)]
 * @member CKEDITOR.config
 */

/**
 * The location of an external file browser that should be launched when the **Browse Server**
 * button is pressed in the **Flash** dialog window.
 *
 * If not set, CKEditor will use {@link CKEDITOR.config#filebrowserBrowseUrl}.
 *
 *        config.filebrowserFlashBrowseUrl = '/browser/browse.php?type=Flash';
 *
 * @since 3.0
 * @cfg {String} [filebrowserFlashBrowseUrl='' (empty string = disabled)]
 * @member CKEDITOR.config
 */

/**
 * The location of the script that handles file uploads in the **Image** dialog window.
 *
 * If not set, CKEditor will use {@link CKEDITOR.config#filebrowserUploadUrl}.
 *
 *        config.filebrowserImageUploadUrl = '/uploader/upload.php?type=Images';
 *
 * @since 3.0
 * @cfg {String} [filebrowserImageUploadUrl='' (empty string = disabled)]
 * @member CKEDITOR.config
 */

/**
 * The location of the script that handles file uploads in the **Flash** dialog window.
 *
 * If not set, CKEditor will use {@link CKEDITOR.config#filebrowserUploadUrl}.
 *
 *        config.filebrowserFlashUploadUrl = '/uploader/upload.php?type=Flash';
 *
 * @since 3.0
 * @cfg {String} filebrowserFlashUploadUrl='' (empty string = disabled)]
 * @member CKEDITOR.config
 */

/**
 * The location of an external file browser that should be launched when the **Browse Server**
 * button is pressed in the **Link** tab of the **Image** dialog window.
 *
 * If not set, CKEditor will use {@link CKEDITOR.config#filebrowserBrowseUrl}.
 *
 *        config.filebrowserImageBrowseLinkUrl = '/browser/browse.php';
 *
 * @since 3.2
 * @cfg {String} [filebrowserImageBrowseLinkUrl='' (empty string = disabled)]
 * @member CKEDITOR.config
 */

/**
 * The features to use in the file browser popup window.
 *
 *        config.filebrowserWindowFeatures = 'resizable=yes,scrollbars=no';
 *
 * @since 3.4.1
 * @cfg {String} [filebrowserWindowFeatures='location=no,menubar=no,toolbar=no,dependent=yes,minimizable=no,modal=yes,alwaysRaised=yes,resizable=yes,scrollbars=yes']
 * @member CKEDITOR.config
 */

/**
 * The width of the file browser popup window. It can be a number denoting a value in
 * pixels or a percent string.
 *
 *        config.filebrowserWindowWidth = 750;
 *
 *        config.filebrowserWindowWidth = '50%';
 *
 * @cfg {Number/String} [filebrowserWindowWidth='80%']
 * @member CKEDITOR.config
 */

/**
 * The height of the file browser popup window. It can be a number denoting a value in
 * pixels or a percent string.
 *
 *        config.filebrowserWindowHeight = 580;
 *
 *        config.filebrowserWindowHeight = '50%';
 *
 * @cfg {Number/String} [filebrowserWindowHeight='70%']
 * @member CKEDITOR.config
 */