TiddlyWiki5/core/modules/commands/render.js

/*\
title: $:/core/modules/commands/render.js
type: application/javascript
module-type: command

Render individual tiddlers and save the results to the specified files

\*/
(function(){

	/*jslint node: true, browser: true */
	/*global $tw: false */
	"use strict";
	
	var widget = require("$:/core/modules/widgets/widget.js");
	
	exports.info = {
		name: "render",
		synchronous: true
	};
	
	var Command = function(params,commander,callback) {
		this.params = params;
		this.commander = commander;
		this.callback = callback;
	};
	
	Command.prototype.execute = function() {
		if(this.params.length < 1) {
			return "Missing tiddler filter";
		}
		var self = this,
			fs = require("fs"),
			path = require("path"),
			wiki = this.commander.wiki,
			tiddlerFilter = this.params[0],
			filenameFilter = this.params[1] || "[is[tiddler]addsuffix[.html]]",
			type = this.params[2] || "text/html",
			template = this.params[3],
			variableList = this.params.slice(4),
			tiddlers = wiki.filterTiddlers(tiddlerFilter),
			variables =  Object.create(null);
			while(variableList.length >= 2) {
				variables[variableList[0]] = variableList[1];
				variableList = variableList.slice(2);
			}
		$tw.utils.each(tiddlers,function(title) {
			var filenameResults = wiki.filterTiddlers(filenameFilter,$tw.rootWidget,wiki.makeTiddlerIterator([title]));
			if(filenameResults.length > 0) {
				var filepath = path.resolve(self.commander.outputPath,filenameResults[0]);
				if(self.commander.verbose) {
					console.log("Rendering \"" + title + "\" to \"" + filepath + "\"");
				}
				var parser = wiki.parseTiddler(template || title),
					widgetNode = wiki.makeWidget(parser,{variables: $tw.utils.extend({},variables,{currentTiddler: title,storyTiddler: title})}),
					container = $tw.fakeDocument.createElement("div");
				widgetNode.render(container,null);
				var text = type === "text/html" ? container.innerHTML : container.textContent;
				$tw.utils.createFileDirectories(filepath);
				fs.writeFileSync(filepath,text,"utf8");
			} else {
				console.log("Not rendering \"" + title + "\" because the filename filter returned an empty result");
			}
		});
		return null;
	};
	
	exports.Command = Command;
	
	})();