/***
|''Name''|TiddlyFileImporter|
|''Version''|0.3.8|
|''Author''|Ben Gillies|
|''Type''|plugin|
|''Description''|Upload a TiddlyWiki file to TiddlyWeb, and import the tiddlers.|
!Usage
Upload a TiddlyWiki file to TiddlyWeb, and import the tiddlers.
!Requires
tiddlyweb
tiddlywebplugins.reflector
!Code
***/
//{{{
(function($){
if(!version.extensions.TiddlyFileImporter)
{ //# ensure that the plugin is only installed once
	version.extensions.TiddlyFileImporter = { installed: true };
}

config.macros.fileImport = {
	reflectorURI: '/reflector?csrf_token=%0',
	incorrectTypeError: 'Incorrect File Type. You must upload a TiddlyWiki',
	uploadLabel: 'Upload',
	uploadLabelPrompt: 'Import tiddlers from this TiddlyWiki',
	step1FileText: 'File:',
	step1URLText: 'URL:',
	step1PostText: 'In the next screen you will select the tiddlers to import.',
	step1Title: 'Step 1: Pick a TiddlyWiki to import',
	step1TypeChooser: 'Import From:',
	step3Html: ['<input type="hidden" name="markList" />',
		'<input type="hidden" checked="true" name="chkSync" />',
		'<input type="hidden" name="chkSave" />',
		'<input type="hidden" name="txtSaveTiddler" />'].join(),

	handler: function(place, macroName, params, wikifier, paramString) {
		var wizard = new Wizard();
		wizard.createWizard(place, 'Import a TiddlyWiki');
		this.restart(wizard);
	},

	restart: function(wizard) {
		var me = config.macros.fileImport;
		wizard.addStep(me.step1Title, ['<input type="hidden" ',
			'name="markList" />'].join(""));
		var markList = wizard.getElement('markList');
		var uploadWrapper = document.createElement('div');
		markList.parentNode.insertBefore(uploadWrapper, markList);
		uploadWrapper.setAttribute('refresh', 'macro');
		uploadWrapper.getAttribute('macroName', 'fileImport');
		var iframeName = 'reflectorImporter' + Math.random().toString();
		me.createForm(uploadWrapper, wizard, iframeName);
		$(uploadWrapper).append('<p>' + me.step1PostText + '</p>');
		wizard.setValue('serverType', 'tiddlyweb');
		wizard.setValue('adaptor', new config.adaptors.file());
		wizard.setValue('host', config.defaultCustomFields['server.host']);
		wizard.setValue('context', {});
		var iframe = $(['<iframe name="' + iframeName + '" ',
			'style="display: none" />'].join("")).appendTo(uploadWrapper);
		var onSubmit = function(ev) {
			var uploadType = $('select[name=uploadtype]', wizard.formElem).val();
			if (uploadType == "file") {
				// set an onload ready to hijack the form
				me.setOnLoad(uploadWrapper, wizard, iframe[0]);
				wizard.importType = 'file';
				wizard.formElem.submit();
			} else {
				var csrf_token = config.extensions.tiddlyspace.getCSRFToken();
				$.ajax({
					url: "%0/reflector?csrf_token=%1".format(
						config.defaultCustomFields["server.host"], csrf_token),
					type: "POST",
					dataType: "text",
					data: {
						uri: $("input", ".importFrom", wizard.formElem).val()
					},
					success: function(data, txtStatus, xhr) {
						wizard.POSTResponse = data;
						me.importTiddlers(uploadWrapper, wizard);
					},
					error: function(xhr, txtStatus, error) {
						displayMessage(["There was an error fetching the ",
							'url: ', txtStatus].join(""));
						me.restart(wizard);
					}
				});
				return false;
			}
		};
		wizard.setButtons([{
			caption: me.uploadLabel,
			tooltip: me.uploadLabelPrompt,
			onClick: onSubmit
		}]);
		$(wizard.formElem).submit(function(ev) {
			onSubmit(ev);
			ev.preventDefault();
		});
	},

	createForm: function(place, wizard, iframeName) {
		var form = wizard.formElem;
		var me = config.macros.fileImport;
		form.action = me.reflectorURI.format(
			config.extensions.tiddlyspace.getCSRFToken());
		form.enctype = 'multipart/form-data';
		form.encoding = 'multipart/form-data';
		form.method = 'POST';
		form.target = iframeName;
		onSelectChange = function(e) {
			var changeTo = $(this).val();
			if (changeTo == "file") {
				$(".importFrom").html('%0 <input type="file" name="file" />'.
					format(me.step1FileText));
			} else {
				$(".importFrom").html('%0 <input type="text" name="uri" />'.
					format(me.step1URLText));
			}
		};
		$(place).append('<span>%0</span>'.format(me.step1TypeChooser)).
			append($(['<select name="uploadtype"><option value="file" selected="selected">file',
				'<option value="uri">url</select>'].join("")).change(onSelectChange)).
			append('<div class="importFrom">%0<input type="file" name="file" /></div>'.
					format(me.step1FileText));
	},

	setOnLoad: function(place, wizard, iframe) {
		var me = config.macros.fileImport;
		var loadHandler = function() {
			me.importTiddlers.apply(this, [place, wizard, iframe]);
		};
		iframe.onload = loadHandler;
		completeReadyStateChanges = 0;
		iframe.onreadystatechange = function() {
			if (++(completeReadyStateChanges) == 5) {
				loadHandler();
			}
		};
	},

	importTiddlers: function(place, wizard, iframe) {
		var tmpStore = new TiddlyWiki();
		var POSTedWiki = "";
		if (wizard.importType == "file") {
			try {
				POSTedWiki= iframe.contentWindow
					.document.documentElement.innerHTML;
			} catch(e) {
				displayMessage(config.macros.fileImport.incorrectTypeError);
				config.macros.fileImport.restart(wizard);
				return;
			}
			// now we are done, so remove the iframe
			$(iframe).remove();
		} else {
			POSTedWiki = wizard.POSTResponse;
		}

		tmpStore.importTiddlyWiki(POSTedWiki);
		var newTiddlers = tmpStore.getTiddlers();
		var workspace = config.defaultCustomFields['server.workspace'];
		var context = {
			status: true,
			statusText: 'OK',
			httpStatus: 200,
			adaptor: wizard.getValue('adaptor'),
			tiddlers: newTiddlers
		};
		context.adaptor.store = tmpStore;
		wizard.setValue('context', context);
		wizard.setValue('workspace', workspace);
		wizard.setValue('inFileImport', true);
		config.macros.importTiddlers.onGetTiddlerList(context, wizard);
	}
};

var _onGetTiddler = config.macros.importTiddlers.onGetTiddler;
config.macros.importTiddlers.onGetTiddler = function(context, wizard) {
	if (wizard.getValue('inFileImport')) {
		var me = config.macros.importTiddlers;
		if(!context.status)
			displayMessage("Error in importTiddlers.onGetTiddler: " + context.statusText);
		var tiddler = context.tiddler;
		var fields = tiddler.fields;
		merge(fields, config.defaultCustomFields);
		fields["server.workspace"] = wizard.getValue('workspace');
		delete fields['server.permissions'];
		delete fields['server.bag'];
		fields['server.page.revision'] = 'false';
		delete fields['server.recipe'];
		fields.changecount = 1;
		store.suspendNotifications();
		store.saveTiddler(tiddler.title, tiddler.title, tiddler.text,
			tiddler.modifier, tiddler.modified, tiddler.tags, tiddler.fields,
			false, tiddler.created);
		store.resumeNotifications();
		var remainingImports = wizard.getValue("remainingImports")-1;
		wizard.setValue("remainingImports",remainingImports);
		if(remainingImports === 0) {
			if(context.isSynchronous) {
				store.notifyAll();
				refreshDisplay();
			}
			wizard.setButtons([
					{caption: me.doneLabel, tooltip: me.donePrompt, onClick: me.onClose}
				],me.statusDoneImport);
			autoSaveChanges();
		}
	} else {
		_onGetTiddler.apply(this, arguments);
	}
};

var _onCancel = config.macros.importTiddlers.onCancel;
config.macros.importTiddlers.onCancel = function(e)
{
	var wizard = new Wizard(this);
	if (!wizard.getValue('inFileImport')) {
		return _onCancel.apply(this, arguments);
	}
	var place = wizard.clear();
	config.macros.fileImport.restart(wizard);
	return false;
};

var _step3Html = config.macros.importTiddlers.step3Html;
var _onGetTiddlerList = config.macros.importTiddlers.onGetTiddlerList;
config.macros.importTiddlers.onGetTiddlerList = function(context, wizard) {
	var fileImport = config.macros.fileImport;
	var importTiddlers = config.macros.importTiddlers;
	if (wizard.getValue('inFileImport')) {
		importTiddlers.step3Html = fileImport.step3Html;
	} else {
		importTiddlers.step3Html = _step3Html;
	}
	_onGetTiddlerList.apply(this, arguments);
};
})(jQuery);
//}}}