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Gettext module For Node.JS to use .MO and .PO files

branch: master
README.md

node-gettext

node-gettext is a Node.JS module to use .MO and .PO files.

NB! If you just want to parse or compile mo/po files, check out gettext-parser.

Features

  • Load binary MO or source PO files
  • Supports contexts and plurals
  • Add your own translations to the list
  • Recompile current translation table into a MO or a PO file!

Build Status

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Installation

npm install node-gettext

Usage

Create a new Gettext object

var Gettext = require("node-gettext");

var gt = new Gettext();

Add a language

addTextdomain(domain, file)

Language data needs to be in the Buffer format - it can be either contents of a MO or PO file.

addTextdomain(domain[, fileContents])

Load from a MO file

var fileContents = fs.readFileSync("et.mo");
gt.addTextdomain("et", fileContents);

or load from a PO file

var fileContents = fs.readFileSync("et.po");
gt.addTextdomain("et", fileContents);

If you do not include the file contents, then a blank language template object is created which can be edited with setTranslation, deleteTranslation methods etc.

Plural rules are automatically detected from the language code

gt.addTextdomain("et");
gt.setTranslation("et", false, "hello!", "tere!");

Check or change default language

textdomain(domain)

gt.textdomain("et");

The function also returns the current texdomain value

var curlang = gt.textdomain();

Translation methods

Load a string from default language file

gettext(msgid)

var greeting = gt.gettext("Hello!");

Load a string from a specific language file

dgettext(domain, msgid)

var greeting = gt.dgettext("et", "Hello!");

Load a plural string from default language file

ngettext(msgid, msgid_plural, count)

gt.ngettext("%d Comment", "%d Comments", 10);

Load a plural string from a specific language file

dngettext(domain, msgid, msgid_plural, count)

gt.dngettext("et", "%d Comment", "%d Comments", 10)

Load a string of a specific context

pgettext(msgctxt, msgid)

gt.pgettext("menu items", "File");

Load a string of a specific context from specific language file

dpgettext(domain, msgctxt, msgid)

gt.dpgettext("et", "menu items", "File");

Load a plural string of a specific context

npgettext(msgctxt, msgid, msgid_plural, count)

gt.npgettext("menu items", "%d Recent File", "%d Recent Files", 3);

Load a plural string of a specific context from specific language file

dnpgettext(domain, msgctxt, msgid, msgid_plural, count)

gt.dnpgettext("et", "menu items", "%d Recent File", "%d Recent Files", 3);

Get comments for a translation (if loaded from PO)

getComment(domain, msgctxt, msgid)

gt.getComment("et", "menu items", "%d Recent File");

Returns an object in the form of {comment: "", code: "", note: ""}

Sets a comments for a translation

setComment(domain, msgctxt, msgid, comment)

gt.getComment("et", "menu items", "%d Recent File", "This is a comment");

comment can either be a string or an object with the following properties: {comment: "", code: "", note: ""}.

String helpers

In order to make things really easy, it is possible to attach the gettext functions directly to string prototypes with gettext.registerStringHelpers()

Example:

// setup gettext
var gettext = new Gettext();
gettext.registerStringHelpers();
gettext.addTextdomain("et", fs.readFileSync("et.mo"));

// translate any string
var translated = "translate this string".gettext();
// or
var plural = "translate %s string".ngettext("translate %s strings", 10);

// you can even change the default textdomain
"".textdomain("en");

The parameters for the gettext functions are the same as with regular gettext methods, except that the msgid parameter is not needed.

Manage translations

Add a translation

setTranslation(domain, context, msgid, translation)

gt.setTranslation("et", "", "Hello", "Tere");

Use an array for plurals

gt.setTranslation("et", "", "%s comments", ["%s kommentaar", "%s kommentaari"]);

Remove a translation

deleteTranslation(domain, context, msgid)

gt.deleteTranslation("et", "", "Hello");

List available contexts

listContextNames([domain])

var contextStrArr = gt.listContextNames("et");

List translation keys for a context

listKeys([domain], [context])

var originalsStrArr = gt.listKeys("et", "");

Compiling

Compile to MO

Compile current translation table to a MO file

compileMO([domain])

fs.writeFile("out.mo", gt.compileMO("et")); 

Compile to PO

Compile current translation table to a PO file

compilePO([domain])

fs.writeFile("out.po", gt.compilePO("et"));

License

MIT

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