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node-red/red/api/theme.js

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/**
* Copyright 2015 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
var express = require("express");
var util = require("util");
var path = require("path");
var fs = require("fs");
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var clone = require("clone");
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var defaultContext = {
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page: {
title: "Node-RED",
favicon: "favicon.ico"
},
header: {
title: "Node-RED",
image: "red/images/node-red.png"
}
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};
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var themeContext = clone(defaultContext);
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var themeSettings = null;
function serveFile(app,baseUrl,file) {
try {
var stats = fs.statSync(file);
var url = baseUrl+path.basename(file);
//console.log(url,"->",file);
app.get(url,function(req, res) {
res.sendfile(file);
});
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return "theme"+url;
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} catch(err) {
//TODO: log filenotfound
return null;
}
}
module.exports = {
init: function(settings) {
var i;
var url;
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themeContext = clone(defaultContext);
themeSettings = null;
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if (settings.editorTheme) {
var theme = settings.editorTheme;
themeSettings = {};
var themeApp = express();
if (theme.page) {
if (theme.page.css) {
var styles = theme.page.css;
if (!util.isArray(styles)) {
styles = [styles];
}
themeContext.page.css = [];
for (i=0;i<styles.length;i++) {
url = serveFile(themeApp,"/css/",styles[i]);
if (url) {
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themeContext.page.css.push(url);
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}
}
}
if (theme.page.favicon) {
url = serveFile(themeApp,"/favicon/",theme.page.favicon)
if (url) {
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themeContext.page.favicon = url;
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}
}
themeContext.page.title = theme.page.title || themeContext.page.title;
}
if (theme.header) {
themeContext.header.title = theme.header.title || themeContext.header.title;
if (theme.header.hasOwnProperty("url")) {
themeContext.header.url = theme.header.url;
}
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if (theme.header.hasOwnProperty("image")) {
if (theme.header.image) {
url = serveFile(themeApp,"/header/",theme.header.image);
if (url) {
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themeContext.header.image = url;
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}
} else {
themeContext.header.image = null;
}
}
}
if (theme.deployButton) {
if (theme.deployButton.type == "simple") {
themeSettings.deployButton = {
type: "simple"
}
if (theme.deployButton.label) {
themeSettings.deployButton.label = theme.deployButton.label;
}
if (theme.deployButton.icon) {
url = serveFile(themeApp,"/deploy/",theme.deployButton.icon);
if (url) {
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themeSettings.deployButton.icon = url;
}
}
}
}
if (theme.hasOwnProperty("userMenu")) {
themeSettings.userMenu = theme.userMenu;
}
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if (theme.login) {
if (theme.login.image) {
url = serveFile(themeApp,"/login/",theme.login.image);
if (url) {
themeContext.login = {
image: url
}
}
}
}
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if (theme.hasOwnProperty("menu")) {
themeSettings.menu = theme.menu;
}
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return themeApp;
}
},
context: function() {
return themeContext;
},
settings: function() {
return themeSettings;
}
}