105 lines
3.3 KiB
JavaScript
105 lines
3.3 KiB
JavaScript
(function() {
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"use strict";
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var typeOf = require('remedial').typeOf;
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var trimWhitespace = require('remove-trailing-spaces');
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function stringify(data) {
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var handlers, indentLevel = '';
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handlers = {
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"undefined": function() {
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// objects will not have `undefined` converted to `null`
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// as this may have unintended consequences
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// For arrays, however, this behavior seems appropriate
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return 'null';
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},
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"null": function() {
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return 'null';
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},
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"number": function(x) {
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return x;
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},
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"boolean": function(x) {
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return x ? 'true' : 'false';
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},
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"string": function(x) {
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// to avoid the string "true" being confused with the
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// the literal `true`, we always wrap strings in quotes
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return JSON.stringify(x);
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},
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"array": function(x) {
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var output = '';
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if (0 === x.length) {
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output += '[]';
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return output;
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}
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indentLevel = indentLevel.replace(/$/, ' ');
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x.forEach(function(y, i) {
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// TODO how should `undefined` be handled?
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var handler = handlers[typeOf(y)];
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if (!handler) {
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throw new Error('what the crap: ' + typeOf(y));
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}
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output += '\n' + indentLevel + '- ' + handler(y, true);
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});
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indentLevel = indentLevel.replace(/ /, '');
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return output;
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},
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"object": function(x, inArray, rootNode) {
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var output = '';
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if (0 === Object.keys(x).length) {
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output += '{}';
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return output;
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}
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if (!rootNode) {
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indentLevel = indentLevel.replace(/$/, ' ');
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}
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Object.keys(x).forEach(function(k, i) {
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var val = x[k],
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handler = handlers[typeOf(val)];
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if ('undefined' === typeof val) {
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// the user should do
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// delete obj.key
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// and not
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// obj.key = undefined
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// but we'll error on the side of caution
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return;
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}
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if (!handler) {
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throw new Error('what the crap: ' + typeOf(val));
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}
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if (!(inArray && i === 0)) {
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output += '\n' + indentLevel;
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}
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output += k + ': ' + handler(val);
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});
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indentLevel = indentLevel.replace(/ /, '');
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return output;
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},
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"function": function() {
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// TODO this should throw or otherwise be ignored
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return '[object Function]';
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}
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};
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return trimWhitespace(handlers[typeOf(data)](data, true, true) + '\n');
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}
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module.exports.stringify = stringify;
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}());
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