2014-11-10 11:55:24 +01:00
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/**
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* Created by avim on 11/9/2014.
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*/
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2014-11-10 14:51:04 +01:00
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'use strict';
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2014-11-10 11:55:24 +01:00
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var cheerio = require('cheerio');
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var _ = require('lodash');
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var esprima = require('esprima');
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var escodegen = require('escodegen');
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var React = require('react');
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2014-11-10 16:55:10 +01:00
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var fs = require('fs');
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2014-11-10 11:55:24 +01:00
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var repeatTemplate = _.template("_.map(<%= collection %>,function (<%= item %>,<%= item %>Index) {\n return <%= body %>}, this)");
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var ifTemplate = _.template("((<%= condition %>)?(<%= body %>):null)");
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var classSetTemplate = _.template("React.addons.classSet(<%= classSet %>)");
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var tagTemplate = _.template("<%= name %>.apply(this,_.flatten([<%= props %>].concat([<%= children %>])))");
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var commentTemplate = _.template(" /* <%= data %> */ ");
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2014-11-10 17:47:06 +01:00
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var templateTemplate = _.template("define([<%= requirePaths %>], function (<%= requireNames %>) {\n <%= injectedFunctions %>\nreturn function(){ return <%= body %>};\n});");
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2014-11-10 11:55:24 +01:00
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var templateProp = "rt-repeat";
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var ifProp = "rt-if";
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var classSetProp = "rt-class";
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var reactSupportedAttributes = ['accept', 'acceptCharset', 'accessKey', 'action', 'allowFullScreen', 'allowTransparency', 'alt', 'async', 'autoComplete', 'autoPlay', 'cellPadding', 'cellSpacing', 'charSet', 'checked', 'classID', 'className', 'cols', 'colSpan', 'content', 'contentEditable', 'contextMenu', 'controls', 'coords', 'crossOrigin', 'data', 'dateTime', 'defer', 'dir', 'disabled', 'download', 'draggable', 'encType', 'form', 'formNoValidate', 'frameBorder', 'height', 'hidden', 'href', 'hrefLang', 'htmlFor', 'httpEquiv', 'icon', 'id', 'label', 'lang', 'list', 'loop', 'manifest', 'max', 'maxLength', 'media', 'mediaGroup', 'method', 'min', 'multiple', 'muted', 'name', 'noValidate', 'open', 'pattern', 'placeholder', 'poster', 'preload', 'radioGroup', 'readOnly', 'rel', 'required', 'role', 'rows', 'rowSpan', 'sandbox', 'scope', 'scrolling', 'seamless', 'selected', 'shape', 'size', 'sizes', 'span', 'spellCheck', 'src', 'srcDoc', 'srcSet', 'start', 'step', 'style', 'tabIndex', 'target', 'title', 'type', 'useMap', 'value', 'width', 'wmode'];
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2014-11-10 14:51:04 +01:00
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var attributesMapping = {'class': 'className', 'rt-class': 'className'};
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2014-11-10 11:55:24 +01:00
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_.forEach(reactSupportedAttributes,function (attributeReactName) {
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if (attributeReactName !== attributeReactName.toLowerCase()) {
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attributesMapping[attributeReactName.toLowerCase()] = attributeReactName;
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}
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});
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function concatChildren(children) {
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var res = "";
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var first = true;
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_.forEach(children, function (child) {
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if (child.indexOf(" /*") !== 0 && child) {
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2014-11-10 14:51:04 +01:00
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res += (first ? "" : ",") + child;
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2014-11-10 11:55:24 +01:00
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first = false;
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} else {
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res += child;
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}
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}, this);
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return res;
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}
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2014-11-10 14:51:04 +01:00
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var curlyMap = {'{': 1, '}': -1};
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2014-11-10 11:55:24 +01:00
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function convertText(txt) {
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txt = txt.trim();
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var res = "";
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var first = true;
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while (txt.indexOf('{') !== -1) {
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var start = txt.indexOf('{');
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var pre = txt.substr(0,start);
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if (pre) {
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2014-11-10 15:23:17 +01:00
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res += (first ? "" : "+") + JSON.stringify(pre);
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2014-11-10 11:55:24 +01:00
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first = false;
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}
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var curlyCounter = 1;
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for (var end = start + 1;end < txt.length && curlyCounter > 0;end++) {
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curlyCounter += curlyMap[txt.charAt(end)] || 0;
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}
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if (curlyCounter !== 0) {
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throw "Failed to parse text";
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} else {
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2014-11-10 14:51:04 +01:00
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res += (first ? "" : "+") + txt.substr(start + 1, end - start - 2);
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2014-11-10 11:55:24 +01:00
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first = false;
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txt = txt.substr(end);
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}
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}
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if (txt) {
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2014-11-10 14:51:04 +01:00
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res += (first ? "" : "+") + JSON.stringify(txt);
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2014-11-10 11:55:24 +01:00
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}
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return res;
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}
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function isStringOnlyCode(txt) {
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txt = txt.trim();
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return txt.length && txt.charAt(0) === '{' && txt.charAt(txt.length - 1) === '}';
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}
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2014-11-10 14:51:04 +01:00
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function generateProps(node, context) {
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var props = {};
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_.forOwn(node.attribs, function (val, key) {
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var propKey = attributesMapping[key.toLowerCase()] || key;
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if (props.hasOwnProperty(propKey)) {
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2014-11-10 14:51:04 +01:00
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throw "duplicate definition of " + propKey + " " + JSON.stringify(node.attribs);
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2014-11-10 11:55:24 +01:00
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}
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if (key.indexOf("on") === 0 && !isStringOnlyCode(val)) {
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var funcParts = val.split("=>");
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var evtParams = funcParts[0].replace("(", "").replace(")", "").trim();
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var funcBody = funcParts[1].trim();
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var generatedFuncName = "generated" + (context.injectedFunctions.length + 1);
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var params = context.boundParams;
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if (evtParams.trim().length > 0) {
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params = params.concat(evtParams.trim());
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}
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2014-11-10 14:51:04 +01:00
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var funcText = "function " + generatedFuncName + "(" + params.join(",");
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funcText += ") {\n" + funcBody + "\n}\n";
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context.injectedFunctions.push(funcText);
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props[propKey] = generatedFuncName + ".bind(" + (["this"].concat(context.boundParams)).join(",") + ")";
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} else if (key === "style" && !isStringOnlyCode(val)) {
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var styleParts = val.trim().split(";");
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styleParts = _.compact(_.map(styleParts, function (str) {
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str = str.trim();
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if (!str || str.indexOf(':') === -1) {
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return null;
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}
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var res = str.split(":");
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res[0] = res[0].trim();
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res[1] = res[1].trim();
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return res;
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}));
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var styleArray = [];
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_.forEach(styleParts, function (stylePart) {
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styleArray.push(stylePart[0] + " : " + convertText(stylePart[1]))
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});
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props[propKey] = "{" + styleArray.join(",") + "}";
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} else if (key === classSetProp) {
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props[propKey] = classSetTemplate({classSet: val});
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} else if (key.indexOf("rt-") !== 0) {
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props[propKey] = convertText(val);
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}
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});
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2014-11-10 14:51:04 +01:00
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return "{" + _.map(props, function (val, key) {
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return JSON.stringify(key) + " : " + val;
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}).join(",") + "}";
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2014-11-10 11:55:24 +01:00
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}
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2014-11-10 14:51:04 +01:00
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function convertTagNameToConstructor(tagName) {
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return React.DOM.hasOwnProperty(tagName) ? "React.DOM." + tagName : tagName;
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2014-11-10 11:55:24 +01:00
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}
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function defaultContext() {
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return {
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boundParams: [],
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injectedFunctions: []
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};
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2014-11-10 11:55:24 +01:00
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}
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2014-11-10 14:51:04 +01:00
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function convertHtmlToReact(node, context) {
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if (node.type === "tag") {
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context = {
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boundParams: _.clone(context.boundParams),
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injectedFunctions: context.injectedFunctions
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};
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2014-11-10 11:55:24 +01:00
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2014-11-10 14:51:04 +01:00
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var data = {name: convertTagNameToConstructor(node.name)};
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2014-11-10 11:55:24 +01:00
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if (node.attribs[templateProp]) {
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data.item = node.attribs[templateProp].split(" in ")[0].trim();
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data.collection = node.attribs[templateProp].split(" in ")[1].trim();
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context.boundParams.push(data.item);
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}
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data.props = generateProps(node, context);
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if (node.attribs[ifProp]) {
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data.condition = node.attribs[ifProp].trim();
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}
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data.children = concatChildren(_.map(node.children, function (child) {
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return convertHtmlToReact(child, context);
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}));
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data.body = tagTemplate(data);
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if (node.attribs[templateProp]) {
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data.body = repeatTemplate(data);
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}
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if (node.attribs[ifProp]) {
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data.body = ifTemplate(data);
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}
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return data.body;
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} else if (node.type === "comment") {
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return (commentTemplate(node));
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} else if (node.type === "text") {
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if (node.data.trim()) {
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return convertText(node.data.trim());
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}
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2014-11-10 15:23:17 +01:00
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return "";
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2014-11-10 11:55:24 +01:00
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}
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}
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2014-11-10 14:51:04 +01:00
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function extractDefinesFromJSXTag(html, defines) {
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html = html.replace(/\<\!doctype jsx\s*(.*?)\s*\>/, function(full, reqStr) {
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var match = true;
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while (match) {
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match = false;
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reqStr = reqStr.replace(/\s*(\w+)\s*\=\s*\"([^\"]*)\"\s*/, function(full, varName, reqPath) {
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defines[reqPath] = varName;
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match = true;
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return "";
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});
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}
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return "";
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});
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return html;
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}
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function convertTemplateToReact(html) {
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var defines = {react: "React", lodash: "_"};
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html = extractDefinesFromJSXTag(html, defines);
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var rootNode = cheerio.load(html.trim(), {lowerCaseTags: false, lowerCaseAttributeNames: false, xmlMode: true});
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var context = defaultContext();
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var body = convertHtmlToReact(rootNode.root()[0].children[0], context);
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2014-11-10 18:08:24 +01:00
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var requirePaths = _(defines).keys().map(function (reqName) {return '"' + reqName + '"';}).value().join(",");
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var requireVars = _(defines).values().value().join(",");
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var data = {body: body, injectedFunctions: "", requireNames: requireVars, requirePaths: requirePaths};
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data.injectedFunctions = context.injectedFunctions.join("\n");
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var code = templateTemplate(data);
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try {
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var tree = esprima.parse(code, {range: true, tokens: true, comment: true});
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tree = escodegen.attachComments(tree, tree.comments, tree.tokens);
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2014-11-10 14:51:04 +01:00
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code = escodegen.generate(tree, {comment: true});
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2014-11-10 11:55:24 +01:00
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} catch (e) {
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}
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return code;
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}
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2014-11-10 16:55:10 +01:00
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/**
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* @param {string} source
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* @param {string} target
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*/
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function convertFile(source, target) {
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// if (path.extname(filename) !== ".html") {
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// console.log('invalid file, only handle html files');
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// return;// only handle html files
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// }
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var html = fs.readFileSync(source).toString();
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if (!html.match(/\<\!doctype jsx/)) {
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console.log('invalid file, missing header');
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return;
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}
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var js = convertTemplateToReact(html);
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fs.writeFileSync(target, js);
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}
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module.exports.convertTemplateToReact = convertTemplateToReact;
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module.exports.convertFile = convertFile;
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