added image file

src/image.js

@@ -0,0 +1,46 @@
+
+var fs = require('fs'),
+	imagemagick = require('node-imagemagick'),
+	meta = require('./meta');
+
+var image = {};
+
+image.resizeImage = function(path, extension, width, height, callback) {
+	function done(err, stdout, stderr) {
+		callback(err);
+	}
+
+	if(extension === '.gif') {
+		imagemagick.convert([path, '-coalesce', '-repage', '0x0', '-crop', width+'x'+height+'+0+0', '+repage', 'uploadPath'], done);
+	} else {
+		imagemagick.crop({
+			srcPath: path,
+			dstPath: path,
+			width: width,
+			height: height
+		}, done);
+	}
+};
+
+image.convertImageToPng = function(path, extension, callback) {
+	var convertToPNG = parseInt(meta.config['profile:convertProfileImageToPNG'], 10);
+	if(convertToPNG && extension !== '.png') {
+		imagemagick.convert([path, 'png:-'], function(err, stdout) {
+			if(err) {
+				return callback(err);
+			}
+
+			fs.writeFile(path, stdout, 'binary', callback);
+		});
+	} else {
+		callback();
+	}
+};
+
+image.convertImageToBase64 = function(path, callback) {
+	fs.readFile(path, function(err, data) {
+		callback(err, data ? data.toString('base64') : null);
+	});
+}
+
+module.exports = image;