"use strict";
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var Readable = require('stream').Readable;
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var QR = require('./qr-base').QR;
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var png = require('./png');
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var vector = require('./vector');
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var fn_noop = function() {};
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var BITMAP_OPTIONS = {
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parse_url: false,
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ec_level: 'M',
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size: 5,
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margin: 4,
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customize: null
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};
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var VECTOR_OPTIONS = {
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parse_url: false,
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ec_level: 'M',
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margin: 1,
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size: 0
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};
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function get_options(options, force_type) {
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if (typeof options === 'string') {
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options = { 'ec_level': options }
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} else {
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options = options || {};
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}
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var _options = {
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type: String(force_type || options.type || 'png').toLowerCase()
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};
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var defaults = _options.type == 'png' ? BITMAP_OPTIONS : VECTOR_OPTIONS;
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for (var k in defaults) {
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_options[k] = k in options ? options[k] : defaults[k];
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}
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return _options;
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}
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function qr_image(text, options) {
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options = get_options(options);
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var matrix = QR(text, options.ec_level, options.parse_url);
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var stream = new Readable();
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stream._read = fn_noop;
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switch (options.type) {
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case 'svg':
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case 'pdf':
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case 'eps':
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process.nextTick(function() {
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vector[options.type](matrix, stream, options.margin, options.size);
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});
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break;
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case 'svgpath':
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// deprecated, use svg_object method
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process.nextTick(function() {
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var obj = vector.svg_object(matrix, options.margin, options.size);
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stream.push(obj.path);
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stream.push(null);
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});
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break;
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case 'png':
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default:
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process.nextTick(function() {
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var bitmap = png.bitmap(matrix, options.size, options.margin);
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if (options.customize) {
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options.customize(bitmap);
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}
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png.png(bitmap, stream);
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});
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}
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return stream;
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}
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function qr_image_sync(text, options) {
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options = get_options(options);
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var matrix = QR(text, options.ec_level, options.parse_url);
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var stream = [];
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var result;
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switch (options.type) {
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case 'svg':
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case 'pdf':
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case 'eps':
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vector[options.type](matrix, stream, options.margin, options.size);
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result = stream.filter(Boolean).join('');
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break;
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case 'png':
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default:
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var bitmap = png.bitmap(matrix, options.size, options.margin);
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if (options.customize) {
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options.customize(bitmap);
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}
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png.png(bitmap, stream);
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result = Buffer.concat(stream.filter(Boolean));
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}
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return result;
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}
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function svg_object(text, options) {
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options = get_options(options, 'svg');
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var matrix = QR(text, options.ec_level);
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return vector.svg_object(matrix, options.margin);
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}
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module.exports = {
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matrix: QR,
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image: qr_image,
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imageSync: qr_image_sync,
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svgObject: svg_object
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};
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