i18n support.

cskr · Jul 27, 2010 · 573d458 · 573d458
1 parent 16b50c2
commit 573d458
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Showing 7 changed files with 92 additions and 10 deletions.
diff --git a/examples/i18n/grasshopper b/examples/i18n/grasshopper
@@ -0,0 +1 @@
+../..
diff --git a/examples/i18n/index.html b/examples/i18n/index.html
@@ -0,0 +1,8 @@
+<html>
+    <head>
+        <title><%= locale['title'] %></title>
+    </head>
+    <body>
+        <h1><%= locale['msg'] %></h1>
+    </body>
+</html>
diff --git a/examples/i18n/locales.js b/examples/i18n/locales.js
@@ -0,0 +1,21 @@
+var gh = require('./grasshopper');
+
+var locales = {};
+locales['en-us'] = {
+    title: 'Color Page',
+    msg: 'Color'
+};
+locales['en-gb'] = {
+    title: 'Colour Page',
+    msg: 'Colour'
+};
+
+gh.configure({
+    locales: locales
+});
+
+gh.get('/', function() {
+    this.render('index');
+});
+
+gh.serve(8080);
diff --git a/lib/ghp.js b/lib/ghp.js
@@ -21,19 +21,19 @@ var cache = {};
 
 var helpers = [{h: escapeHTML}];
 
-function fill(templateFile, model, encoding, viewsDir, extn) {
+function fill(templateFile, model, encoding, viewsDir, extn, locale) {
     var template = cache[templateFile];
     if(!template) {
         var content = fs.readFileSync(templateFile, encoding);
-        cache[templateFile] = template = compile(content, helpers.length + 1);
+        cache[templateFile] = template = compile(content, helpers.length + 2);
     }
-    return template(model, [new IncludeHelper(model, encoding, viewsDir, extn)].concat(helpers));
+    return template(model, [new IncludeHelper(model, encoding, viewsDir, extn, locale), {locale: locale}].concat(helpers));
 }
 
 exports.fill = fill;
 
 exports.fillText = function(text, model) {
-    return compile(text, helpers.length)(model, helpers);
+    return compile(text, 0)(model);
 }
 
 exports.addHelpers = function(newHelpers) {
@@ -76,15 +76,16 @@ function compile(text, helpersCount) {
 }
 
 // Class: IncludeHelper
-function IncludeHelper(model, encoding, viewsDir, extn) {
+function IncludeHelper(model, encoding, viewsDir, extn, locale) {
     this.model = model;
     this.encoding = encoding;
     this.viewsDir = viewsDir;
     this.extn = extn;
+    this.locale = locale;
 }
 
 IncludeHelper.prototype.include = function(templateFile) {
-    return fill(this.viewsDir + '/' + templateFile + '.' + this.extn , this.model, this.encoding, this.viewsDir, this.extn);
+    return fill(this.viewsDir + '/' + templateFile + '.' + this.extn , this.model, this.encoding, this.viewsDir, this.extn, this.locale);
 }
 
 function escapeHTML(html) {

diff --git a/lib/grasshopper.js b/lib/grasshopper.js
@@ -19,7 +19,8 @@ var http = require('http'),
     querystring = require('querystring'),
     renderer = require('./renderer'),
     multipart = require('./multipart'),
-    session = require('./session');
+    session = require('./session'),
+    i18n = require('./i18n');
 
 var routes = {};
 var filters = [];
@@ -45,6 +46,7 @@ exports.configure = function(config) {
     renderer.configure(config);
     multipart.configure(config);
     session.configure(config);
+    i18n.configure(config);
 };
 
 exports.get = function(path, controller) {

diff --git a/lib/i18n.js b/lib/i18n.js
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2010 Chandra Sekar S
+ *
+ * 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 locales,
+    defaultLocale = 'en-us';
+
+exports.configure = function(config) {
+    if(config.locales)
+        locales = config.locales;
+    if(config.defaultLocale)
+        defaultLocale = config.defaultLocale;
+};
+
+exports.init = function(ctx) {
+    if(locales) {
+        var acceptLanguage = ctx.request.headers['accept-language'];
+        if(acceptLanguage) {
+            var ranges = acceptLanguage.split(',');
+            for(var i = 0; i < ranges.length; i++) {
+                var range = ranges[i].split(';', 1)[0].toLowerCase();
+                if(locales[range]) {
+                    ctx.locale = locales[range];
+                    return;
+                }
+            }
+        }
+        ctx.locale = locales[defaultLocale];
+    }
+};
diff --git a/lib/renderer.js b/lib/renderer.js
@@ -22,12 +22,14 @@ var fs = require('fs'),
     uuid = require('./uuid'),
     session = require('./session'),
     ghp = require('./ghp'),
-    gh = require('./grasshopper');
+    gh = require('./grasshopper'),
+    i18n = require('./i18n');
 
 var viewsDir = '.',
     defaultViewExtn = 'html',
     staticsDir = '.',
     defaultEncoding = 'utf8',
+    defaultCharset = 'UTF-8',
     layout = undefined;
 
 exports.handleError = function(err, req, res, params) {
@@ -45,6 +47,8 @@ exports.configure = function(config) {
         defaultViewExtn = config.defaultViewExtn;
     if(config.staticsDir)
         staticsDir = config.staticsDir;
+    if(config.defaultCharset)
+        defaultCharset = config.defaultCharset;
     if(config.defaultEncoding)
         defaultEncoding = config.defaultEncoding;
     if(config.layout)
@@ -82,6 +86,9 @@ function RequestContext(request, response, params) {
             }
         }
     }
+
+    i18n.init(this);
+    this.charset = defaultCharset;
 }
 
 RequestContext.prototype.getExtn = function() {
@@ -130,7 +137,7 @@ RequestContext.prototype.render = function(view, useLayout) {
         }
 
         try {
-            var content = ghp.fill(viewFile, this.model, this.encoding, viewsDir, this.extn);
+            var content = ghp.fill(viewFile, this.model, this.encoding, viewsDir, this.extn, this.locale);
             this.send(content);
         } catch(e) {
             this.handleError(e);
@@ -151,6 +158,7 @@ RequestContext.prototype.renderText = function(text) {
 };
 
 RequestContext.prototype.send = function(text) {
+    this.headers['content-type'] += '; charset=' + this.charset
     this.response.writeHead(this.status, this.headers);
     if(this.request.method != 'HEAD') {
         this.response.write(text, this.encoding);
@@ -215,7 +223,7 @@ RequestContext.prototype.renderError = function(status, error) {
     fs.stat(viewFile, function(err, stats) {
         if(!err && stats.isFile()) {
             try {
-                var content = ghp.fill(viewFile, {error: error}, self.encoding, viewsDir, self.extn);
+                var content = ghp.fill(viewFile, {error: error}, self.encoding, viewsDir, self.extn, this.locale);
                 self.send(content);
             } catch(e) {
                 self.handleError(e);