Document export-import UI and integration code (#1501)

chrome/content/zotero-platform/mac/bibliography.css

@@ -0,0 +1,3 @@
+.chevron {
+	font-size: 1.5em;
+}

chrome/content/zotero/bibliography.js

@@ -32,6 +32,7 @@
 // Class to provide options for bibliography
 // Used by rtfScan.xul, integrationDocPrefs.xul, and bibliography.xul
 
+Components.utils.import("resource://gre/modules/Services.jsm");
 var Zotero_File_Interface_Bibliography = new function() {
 	var _io;
 	
@@ -174,6 +175,10 @@ var Zotero_File_Interface_Bibliography = new function() {
 				
 				document.getElementById("automaticCitationUpdates-checkbox").checked = !_io.delayCitationUpdates;
 			}
+			
+			if (_io.showImportExport) {
+				document.querySelector('#exportImport').hidden = false;
+			}
 		}
 		
 		// set style to false, in case this is cancelled
@@ -237,7 +242,38 @@ var Zotero_File_Interface_Bibliography = new function() {
 
 		window.sizeToContent();
 	};
-
+	
+	this.toggleAdvanced = function() {
+		var advancedSettings = document.querySelector("#advanced-settings");
+		advancedSettings.hidden = !advancedSettings.hidden;
+		var chevron = document.querySelector('.chevron');
+		chevron.classList.toggle('chevron-down');
+		chevron.classList.toggle('chevron-up');
+		window.sizeToContent();
+	};
+	
+	this.exportDocument = function() {
+		const importExportWikiURL = "https://www.zotero.org/support/kb/export_import_document";
+		
+		var ps = Services.prompt;
+		var buttonFlags = (ps.BUTTON_POS_0) * (ps.BUTTON_TITLE_OK)
+			+ (ps.BUTTON_POS_1) * (ps.BUTTON_TITLE_CANCEL)
+			+ (ps.BUTTON_POS_2) * (ps.BUTTON_TITLE_IS_STRING);
+		var result = ps.confirmEx(null,
+			Zotero.getString('integration.exportDocument'),
+			Zotero.getString('integration.exportDocument.description'),
+			buttonFlags,
+			null,
+			null,
+			Zotero.getString('general.moreInformation'), null, {});
+		if (result == 0) {
+			_io.exportDocument = true;
+			document.documentElement.acceptDialog();
+		} else if (result == 2) {
+			Zotero.launchURL(importExportWikiURL);
+		}
+	}
+	
 	/*
 	 * Update locale menulist when style is changed
 	 */

chrome/content/zotero/integration/integrationDocPrefs.xul

@@ -26,6 +26,7 @@
 <?xml-stylesheet href="chrome://global/skin/global.css"?>
 <?xml-stylesheet href="chrome://browser/skin/preferences/preferences.css"?>
 <?xml-stylesheet href="chrome://zotero/skin/bibliography.css"?>
+<?xml-stylesheet href="chrome://zotero-platform/content/bibliography.css"?>
 <!DOCTYPE window SYSTEM "chrome://zotero/locale/zotero.dtd">
 
 <dialog
@@ -81,14 +82,27 @@
 			</radiogroup>
 		</groupbox>
 
-		<vbox id="automaticJournalAbbreviations-vbox">
+		<vbox class="pref-vbox" id="automaticJournalAbbreviations-vbox">
 			<checkbox id="automaticJournalAbbreviations-checkbox" label="&zotero.integration.prefs.automaticJournalAbbeviations.label;"/>
 			<description class="radioDescription">&zotero.integration.prefs.automaticJournalAbbeviations.caption;</description>
 		</vbox>
 		
-		<vbox id="automaticCitationUpdates-vbox">
-			<checkbox id="automaticCitationUpdates-checkbox" label="&zotero.integration.prefs.automaticCitationUpdates.label;" tooltiptext="&zotero.integration.prefs.automaticCitationUpdates.tooltip;"/>
-			<description class="radioDescription">&zotero.integration.prefs.automaticCitationUpdates.description;</description>
+		<!--<vbox id="advanced-separator" align="center">-->
+			<!--<hbox align="center" onclick="Zotero_File_Interface_Bibliography.toggleAdvanced()">-->
+                <!--<label>&zotero.general.advancedOptions.label;</label>-->
+				<!--<label class="chevron chevron-down">➤</label>-->
+			<!--</hbox>-->
+		<!--</vbox>	-->
+		
+		<vbox id="advanced-settings" hidden="false">
+			<vbox id="automaticCitationUpdates-vbox">
+				<checkbox id="automaticCitationUpdates-checkbox" label="&zotero.integration.prefs.automaticCitationUpdates.label;" tooltiptext="&zotero.integration.prefs.automaticCitationUpdates.tooltip;"/>
+				<description class="radioDescription">&zotero.integration.prefs.automaticCitationUpdates.description;</description>
+			</vbox>
+			<hbox id="exportImport" hidden="true">
+				<button label="&zotero.integration.prefs.exportDocument;" oncommand="Zotero_File_Interface_Bibliography.exportDocument()"/>
+			</hbox>
 		</vbox>
+		
 	</vbox>
 </dialog>

chrome/content/zotero/xpcom/connector/httpIntegrationClient.js

@@ -59,12 +59,16 @@ Zotero.HTTPIntegrationClient.Application = function() {
 	this.secondaryFieldType = "Http";
 	this.outputFormat = 'html';
 	this.supportedNotes = ['footnotes'];
+	this.supportsImportExport = false;
+	this.processorName = "HTTP Integration";
 };
 Zotero.HTTPIntegrationClient.Application.prototype = {
 	getActiveDocument: async function() {
 		let result = await Zotero.HTTPIntegrationClient.sendCommand('Application.getActiveDocument');
 		this.outputFormat = result.outputFormat || this.outputFormat;
 		this.supportedNotes = result.supportedNotes || this.supportedNotes;
+		this.supportsImportExport = result.supportsImportExport || this.supportsImportExport;
+		this.processorName = result.processorName || this.processorName;
 		return new Zotero.HTTPIntegrationClient.Document(result.documentID);
 	}
 };
@@ -76,7 +80,7 @@ Zotero.HTTPIntegrationClient.Document = function(documentID) {
 	this._documentID = documentID;
 };
 for (let method of ["activate", "canInsertField", "displayAlert", "getDocumentData",
-	"setDocumentData", "setBibliographyStyle"]) {
+	"setDocumentData", "setBibliographyStyle", "importDocument", "exportDocument"]) {
 	Zotero.HTTPIntegrationClient.Document.prototype[method] = async function() {
 		return Zotero.HTTPIntegrationClient.sendCommand("Document."+method,
 			[this._documentID].concat(Array.prototype.slice.call(arguments)));

chrome/content/zotero/xpcom/connector/server_connectorIntegration.js

@@ -74,7 +74,7 @@ Zotero.Server.Endpoints['/connector/document/respond'].prototype = {
 // For managing macOS integration and progress window focus
 Zotero.Server.Endpoints['/connector/sendToBack'] = function() {};
 Zotero.Server.Endpoints['/connector/sendToBack'].prototype = {
-	supportedMethods: ["POST"],
+	supportedMethods: ["POST", "GET"],
 	supportedDataTypes: ["application/json"],
 	permitBookmarklet: true,
 	init: function() {

chrome/content/zotero/xpcom/integration.js

@@ -59,6 +59,8 @@ const DELAYED_CITATION_RTF_STYLING_CLEAR = "\\ulclear";
 const DELAYED_CITATION_HTML_STYLING = "<div class='delayed-zotero-citation-updates'>"
 const DELAYED_CITATION_HTML_STYLING_END = "</div>"
 
+const EXPORTED_DOCUMENT_MARKER = "ZOTERO_EXPORTED_DOCUMENT";
+
 
 Zotero.Integration = new function() {
 	Components.utils.import("resource://gre/modules/Services.jsm");
@@ -210,7 +212,7 @@ Zotero.Integration = new function() {
 	 * Executes an integration command, first checking to make sure that versions are compatible
 	 */
 	this.execCommand = async function(agent, command, docId) {
-		var document, session;
+		var document, session, documentImported;
 		
 		if (Zotero.Integration.currentDoc) {
 			Zotero.Utilities.Internal.activate();
@@ -243,12 +245,13 @@ Zotero.Integration = new function() {
 			}
 			Zotero.Integration.currentDoc = document = await documentPromise;
 			
-			Zotero.Integration.currentSession = session = await Zotero.Integration.getSession(application, document, agent);
-			// TODO: this is a pretty awful circular dependence
-			session.fields = new Zotero.Integration.Fields(session, document);
+			[session, documentImported] = await Zotero.Integration.getSession(application, document, agent);
+			Zotero.Integration.currentSession = session;
 			// TODO: figure this out
 			// Zotero.Notifier.trigger('delete', 'collection', 'document');
-			await (new Zotero.Integration.Interface(application, document, session))[command]();
+			if (!documentImported) {
+				await (new Zotero.Integration.Interface(application, document, session))[command]();
+			}
 			await document.setDocumentData(session.data.serialize());
 		}
 		catch (e) {
@@ -257,7 +260,9 @@ Zotero.Integration = new function() {
 			}
 			else {
 				// If user cancels we should still write the currently assigned session ID
-				await document.setDocumentData(session.data.serialize());
+				if (session) {
+					await document.setDocumentData(session.data.serialize());
+				}
 			}
 		}
 		finally {
@@ -415,6 +420,7 @@ Zotero.Integration = new function() {
 	 * @return {Zotero.Integration.Session} Promise
 	 */
 	this.getSession = async function (app, doc, agent) {
+		let documentImported = false;
 		try {
 			var progressBar = new Zotero.Integration.Progress(4, Zotero.isMac && agent != 'http');
 			progressBar.show();
@@ -428,7 +434,7 @@ Zotero.Integration = new function() {
 				data = new Zotero.Integration.DocumentData();
 			}
 			
-			if (data.prefs.fieldType) {
+			if (dataString != EXPORTED_DOCUMENT_MARKER && data.prefs.fieldType) {
 				if (data.dataVersion < DATA_VERSION) {
 					if (data.dataVersion == 1
 							&& data.prefs.fieldType == "Field"
@@ -462,36 +468,54 @@ Zotero.Integration = new function() {
 				session = new Zotero.Integration.Session(doc, app);
 				session.reload = true;
 			}
-			try {
-				await session.setData(data);
-			} catch(e) {
-				// make sure style is defined
-				if (e instanceof Zotero.Exception.Alert && e.name === "integration.error.invalidStyle") {
-					if (data.style.styleID) {
-						let trustedSource = /^https?:\/\/(www\.)?(zotero\.org|citationstyles\.org)/.test(data.style.styleID);
-						let errorString = Zotero.getString("integration.error.styleMissing", data.style.styleID);
-						if (trustedSource || 
-							await doc.displayAlert(errorString, DIALOG_ICON_WARNING, DIALOG_BUTTONS_YES_NO)) {
+			session.agent = agent;
+			session._doc = doc;
+			session.progressBar = progressBar;
+			// TODO: this is a pretty awful circular dependence
+			session.fields = new Zotero.Integration.Fields(session, doc);
+			
+			if (dataString == EXPORTED_DOCUMENT_MARKER) {
+				Zotero.Integration.currentSession = session;
+				data = await session.importDocument();
+				documentImported = true;
+				// We're slightly abusing the system here, but importing a document should cancel
+				// any other operation the user was trying to perform since the document will change
+				// significantly
+			} else {
+				try {
+					await session.setData(data);
+				} catch(e) {
+					// make sure style is defined
+					if (e instanceof Zotero.Exception.Alert && e.name === "integration.error.invalidStyle") {
+						if (data.style.styleID) {
+							let trustedSource =
+								/^https?:\/\/(www\.)?(zotero\.org|citationstyles\.org)/.test(data.style.styleID);
+							let errorString = Zotero.getString("integration.error.styleMissing", data.style.styleID);
+							if (trustedSource ||
+								await doc.displayAlert(errorString, DIALOG_ICON_WARNING, DIALOG_BUTTONS_YES_NO)) {
 
-							let installed = false;
-							try {
-								let { styleTitle, styleID } = await Zotero.Styles.install(
-									{url: data.style.styleID}, data.style.styleID, true
-								);
-								data.style.styleID = styleID;
-								installed = true;
-							}
-							catch (e) {
-								await doc.displayAlert(
-									Zotero.getString(
-										'integration.error.styleNotFound', data.style.styleID
-									),
-									DIALOG_ICON_WARNING,
-									DIALOG_BUTTONS_OK
-								);
-							}
-							if (installed) {
-								await session.setData(data, true);
+								let installed = false;
+								try {
+									let { styleTitle, styleID } = await Zotero.Styles.install(
+										{url: data.style.styleID}, data.style.styleID, true
+									);
+									data.style.styleID = styleID;
+									installed = true;
+								}
+								catch (e) {
+									await doc.displayAlert(
+										Zotero.getString(
+											'integration.error.styleNotFound', data.style.styleID
+										),
+										DIALOG_ICON_WARNING,
+										DIALOG_BUTTONS_OK
+									);
+								}
+								if (installed) {
+									await session.setData(data, true);
+								} else {
+									await session.setDocPrefs();
+								}
 							} else {
 								await session.setDocPrefs();
 							}
@@ -499,24 +523,19 @@ Zotero.Integration = new function() {
 							await session.setDocPrefs();
 						}
 					} else {
-						await session.setDocPrefs();
+						throw e;
 					}
-				} else {
-					throw e;
 				}
 			}
 		} catch (e) {
 			progressBar.hide(true);
 			throw e;
 		}
-		session.agent = agent;
-		session._doc = doc;
 		if (session.progressBar) {
 			progressBar.reset();
 			progressBar.segments = session.progressBar.segments;
 		}
-		session.progressBar = progressBar;
-		return session;
+		return [session, documentImported];
 	};
 	
 }
@@ -731,12 +750,12 @@ Zotero.Integration.Interface.prototype.setDocPrefs = Zotero.Promise.coroutine(fu
 	
 	if(!haveSession) {
 		// This is a brand new document; don't try to get fields
-		oldData = yield this._session.setDocPrefs();
+		oldData = yield this._session.setDocPrefs(true);
 	} else {
 		// Can get fields while dialog is open
 		oldData = yield Zotero.Promise.all([
 			this._session.fields.get(),
-			this._session.setDocPrefs()
+			this._session.setDocPrefs(true)
 		]).spread(function (fields, setDocPrefs) {
 			// Only return value from setDocPrefs
 			return setDocPrefs;
@@ -861,9 +880,9 @@ Zotero.Integration.Fields.prototype.addField = async function(note) {
  */
 Zotero.Integration.Fields.prototype.get = new function() {
 	var deferred;
-	return async function() {
+	return async function(force=false) {
 		// If we already have fields, just return them
-		if(this._fields != undefined) {
+		if(!force && this._fields != undefined) {
 			return this._fields;
 		}
 		
@@ -1519,10 +1538,11 @@ Zotero.Integration.Session.prototype.setData = async function (data, resetStyle)
  *    if there wasn't, or rejected with Zotero.Exception.UserCancelled if the dialog was
  *    cancelled.
  */
-Zotero.Integration.Session.prototype.setDocPrefs = Zotero.Promise.coroutine(function* (highlightDelayCitations=false) {
+Zotero.Integration.Session.prototype.setDocPrefs = Zotero.Promise.coroutine(function* (showImportExport=false) {
 	var io = new function() { this.wrappedJSObject = this; };
 	io.primaryFieldType = this.primaryFieldType;
 	io.secondaryFieldType = this.secondaryFieldType;
+	io.showImportExport = false;
 	
 	if (this.data) {
 		io.style = this.data.style.styleID;
@@ -1532,14 +1552,18 @@ Zotero.Integration.Session.prototype.setDocPrefs = Zotero.Promise.coroutine(func
 		io.fieldType = this.data.prefs.fieldType;
 		io.delayCitationUpdates = this.data.prefs.delayCitationUpdates;
 		io.dontAskDelayCitationUpdates = this.data.prefs.dontAskDelayCitationUpdates;
-		io.highlightDelayCitations = highlightDelayCitations;
 		io.automaticJournalAbbreviations = this.data.prefs.automaticJournalAbbreviations;
 		io.requireStoreReferences = !Zotero.Utilities.isEmpty(this.embeddedItems);
+		io.showImportExport = showImportExport && this.data.prefs.fieldType && this._app.supportsImportExport;
 	}
 	
 	// Make sure styles are initialized for new docs
 	yield Zotero.Styles.init();
 	yield Zotero.Integration.displayDialog('chrome://zotero/content/integration/integrationDocPrefs.xul', '', io);
+
+	if (io.exportDocument) {
+		return this.exportDocument();
+	}
 	
 	if (!io.style || !io.fieldType) {
 		throw new Zotero.Exception.UserCancelled("document preferences window");
@@ -1581,14 +1605,61 @@ Zotero.Integration.Session.prototype.setDocPrefs = Zotero.Promise.coroutine(func
 	return oldData || null;
 })
 
-/**
- * Adds a citation based on a serialized Word field
- */
-Zotero.Integration._oldCitationLocatorMap = {
-	p:"page",
-	g:"paragraph",
-	l:"line"
-};
+Zotero.Integration.Session.prototype.exportDocument = async function() {
+	Zotero.debug("Integration: Exporting the document");
+	var timer = new Zotero.Integration.Timer();
+	timer.start();
+	try {
+		this.data.style.bibliographyStyleHasBeenSet = false;
+		await this._doc.setDocumentData(this.data.serialize());
+		await this._doc.exportDocument(this.data.prefs.fieldType,
+			Zotero.getString('integration.importInstructions'));
+	} finally {
+		Zotero.debug(`Integration: Export finished in ${timer.stop()}`);
+	}
+}
+
+
+Zotero.Integration.Session.prototype.importDocument = async function() {
+	const importExportWikiURL = "https://www.zotero.org/support/kb/export_import_document";
+	
+	var ps = Services.prompt;
+	var buttonFlags = (ps.BUTTON_POS_0) * (ps.BUTTON_TITLE_OK)
+		+ (ps.BUTTON_POS_1) * (ps.BUTTON_TITLE_CANCEL)
+		+ (ps.BUTTON_POS_2) * (ps.BUTTON_TITLE_IS_STRING);
+	var result = ps.confirmEx(null,
+		Zotero.getString('integration.importDocument'),
+		Zotero.getString('integration.importDocument.description'),
+		buttonFlags,
+		null,
+		null,
+		Zotero.getString('general.moreInformation'), null, {});
+	if (result == 1) {
+		throw new Zotero.Exception.UserCancelled("the document import");
+	} else if (result == 2) {
+		Zotero.launchURL(importExportWikiURL);
+		return;
+	}
+	Zotero.debug("Integration: Importing the document");
+	var timer = new Zotero.Integration.Timer();
+	timer.start();
+	try {
+		var importSuccessful = await this._doc.importDocument(this._app.primaryFieldType);
+		if (!importSuccessful) {
+			Zotero.debug("Integration: No importable data found in the document");
+			return this.displayAlert("No importable data found", DIALOG_ICON_WARNING, DIALOG_BUTTONS_OK);
+		}
+		var data = new Zotero.Integration.DocumentData(await this._doc.getDocumentData());
+		data.prefs.fieldType = this._app.primaryFieldType;
+		await this.setData(data, true);
+		await this.fields.get(true);
+		await this.fields.updateSession(FORCE_CITATIONS_RESET_TEXT);
+		await this.fields.updateDocument(FORCE_CITATIONS_RESET_TEXT, true, true);
+	} finally {
+		Zotero.debug(`Integration: Import finished in ${timer.stop()}`);
+	}
+	return data;
+}
 
 /**
  * Adds a citation to the arrays representing the document
@@ -2228,6 +2299,16 @@ Zotero.Integration.Field.loadExisting = async function(docField) {
 	return field;
 };
 
+/**
+ * Adds a citation based on a serialized Word field
+ */
+Zotero.Integration._oldCitationLocatorMap = {
+	p:"page",
+	g:"paragraph",
+	l:"line"
+};
+
+
 Zotero.Integration.CitationField = class extends Zotero.Integration.Field {
 	constructor(field, rawCode) {
 		super(field, rawCode);
@@ -2908,7 +2989,8 @@ Zotero.Integration.LegacyPluginWrapper = function(application) {
 		primaryFieldType: application.primaryFieldType,
 		secondaryFieldType: application.secondaryFieldType,
 		outputFormat: 'rtf',
-		supportedNotes: ['footnotes', 'endnotes']
+		supportedNotes: ['footnotes', 'endnotes'],
+		processorName: ''
 	}
 }
 Zotero.Integration.LegacyPluginWrapper.wrapField = function (field) {

chrome/locale/en-US/zotero/zotero.dtd

@@ -243,10 +243,12 @@
 <!ENTITY zotero.integration.prefs.automaticCitationUpdates.tooltip     "Citations with pending updates will be highlighted in the document">
 <!ENTITY zotero.integration.prefs.automaticCitationUpdates.description "Disabling updates can speed up citation insertion in large documents. Click Refresh to update citations manually.">
 
-
 <!ENTITY zotero.integration.prefs.automaticJournalAbbeviations.label 		"Use MEDLINE journal abbreviations">
 <!ENTITY zotero.integration.prefs.automaticJournalAbbeviations.caption	"The “Journal Abbr” field will be ignored.">
 
+<!ENTITY zotero.integration.prefs.exportDocument 		"Export document…">
+<!ENTITY zotero.integration.prefs.importDocument 		"Import document…">
+
 <!ENTITY zotero.integration.showEditor.label			"Show Editor">
 <!ENTITY zotero.integration.classicView.label			"Classic View">
 

chrome/locale/en-US/zotero/zotero.properties

@@ -897,6 +897,11 @@ integration.delayCitationUpdates.alert.text2.tab = You will need to click Refres
 integration.delayCitationUpdates.alert.text3 = You can change this setting later in the document preferences.
 integration.delayCitationUpdates.bibliography.toolbar	= Automatic citation updates are disabled. To see the bibliography, click Refresh in the Zotero toolbar.
 integration.delayCitationUpdates.bibliography.tab	= Automatic citation updates are disabled. To see the bibliography, click Refresh in the Zotero tab.
+integration.importDocument                          = Import Document?
+integration.importDocument.description              = Would you like to import this document for use with Zotero?
+integration.exportDocument                          = Export Document?
+integration.exportDocument.description              = Exporting the document will allow you to import it in a different Zotero supported word processor and retain citation links. You should make a backup of your document before exporting. Do you want to proceed?
+integration.importInstructions = This document contains exported Zotero citations. Open it with a Zotero supported document editor and press "Refresh" in the Zotero plugin to import it. NOTE: Do not copy and paste the contents of the document from one processor to the other.
 
 styles.install.title				= Install Style
 styles.install.unexpectedError		= An unexpected error occurred while installing "%1$S"

chrome/skin/default/zotero/bibliography.css

@@ -25,6 +25,25 @@ radio:not(:first-child)
 }
 
 
-#automaticJournalAbbreviations-vbox, #automaticCitationUpdates-vbox {
+#automaticJournalAbbreviations-vbox, #advanced-settings {
 	padding: 0 14px;
-}
+}
+
+#advanced-separator * {
+	cursor: pointer;
+}
+
+.chevron {
+	color: #444;
+}
+
+.chevron.chevron-down {
+	transform: rotate(90deg);
+}
+.chevron.chevron-up {
+	transform: rotate(-90deg);
+}
+
+#advanced-settings > * {
+	margin-bottom: 10px;
+}

test/tests/integrationTest.js

@@ -21,6 +21,7 @@ describe("Zotero.Integration", function () {
 		this.primaryFieldType = "Field";
 		this.secondaryFieldType = "Bookmark";
 		this.supportedNotes = ['footnotes', 'endnotes'];
+		this.supportsImportExport = true;
 		this.fields = [];
 	};
 	DocumentPluginDummy.Application.prototype = {
@@ -119,6 +120,31 @@ describe("Zotero.Integration", function () {
 		 * Informs the document processor that the operation is complete
 		 */
 		complete: () => 0,
+		
+		/**
+		 * Converts field text in document to their underlying codes and appends
+		 * document preferences and bibliography style as paragraphs at the end
+		 * of the document. Prefixes:
+		 * 	- Bibliography style: "BIBLIOGRAPHY_STYLE "
+		 * 	- Document preferences: "DOCUMENT_PREFERENCES "
+		 * 	
+		 * 	All Zotero exported text must be converted to a hyperlink
+		 * 	(with any url, e.g. http://www.zotero.org)
+		 */
+		exportDocument: (fieldType) => 0,
+		
+		/**
+		 * Converts a document from an exported form described in #exportDocument()
+		 * to a Zotero editable form. Bibliography Style and Document Preferences
+		 * text is removed and stored internally within the doc. The citation codes are
+		 * also stored within the doc in appropriate representation. 
+		 * 
+		 * Note that no citation text updates are needed. Zotero will issue field updates 
+		 * manually.
+		 * 
+		 * @returns {Boolean} whether the document contained importable data
+		 */
+		importDocument: (fieldType) => 0,
 	};
 
 	/**