/
stringify.js
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/
stringify.js
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'use strict';
var Utils = require('./utils');
var arrayPrefixGenerators = {
brackets: function brackets(prefix) {
return prefix + '[]';
},
indices: function indices(prefix, key) {
return prefix + '[' + key + ']';
},
repeat: function repeat(prefix) {
return prefix;
}
};
var defaults = {
delimiter: '&',
strictNullHandling: false,
skipNulls: false,
encode: true,
encoder: Utils.encode
};
var isArray = Array.isArray;
var stringify = function stringify(object, prefix, generateArrayPrefix, strictNullHandling, skipNulls, encoder, filter, sort, allowDots) {
var obj = object;
if (typeof filter === 'function') {
obj = filter(prefix, obj);
} else if (obj instanceof Date) {
obj = obj.toISOString();
} else if (obj === null) {
if (strictNullHandling) {
return encoder ? encoder(prefix) : prefix;
}
obj = '';
}
if (typeof obj === 'string' || typeof obj === 'number' || typeof obj === 'boolean' || Utils.isBuffer(obj)) {
if (encoder) {
return [encoder(prefix) + '=' + encoder(obj)];
}
return [prefix + '=' + String(obj)];
}
var values = [];
if (typeof obj === 'undefined') {
return values;
}
var objKeys;
if (isArray(filter)) {
objKeys = filter;
} else {
var keys = Object.keys(obj);
objKeys = sort ? keys.sort(sort) : keys;
}
for (var i = 0; i < objKeys.length; ++i) {
var key = objKeys[i];
if (skipNulls && obj[key] === null) {
continue;
}
if (isArray(obj)) {
values = values.concat(stringify(obj[key], generateArrayPrefix(prefix, key), generateArrayPrefix, strictNullHandling, skipNulls, encoder, filter, sort, allowDots));
} else {
values = values.concat(stringify(obj[key], prefix + (allowDots ? '.' + key : '[' + key + ']'), generateArrayPrefix, strictNullHandling, skipNulls, encoder, filter, sort, allowDots));
}
}
return values;
};
module.exports = function (object, opts) {
var obj = object;
var options = opts || {};
var delimiter = typeof options.delimiter === 'undefined' ? defaults.delimiter : options.delimiter;
var strictNullHandling = typeof options.strictNullHandling === 'boolean' ? options.strictNullHandling : defaults.strictNullHandling;
var skipNulls = typeof options.skipNulls === 'boolean' ? options.skipNulls : defaults.skipNulls;
var encode = typeof options.encode === 'boolean' ? options.encode : defaults.encode;
var encoder = encode ? typeof options.encoder === 'function' ? options.encoder : defaults.encoder : null;
var sort = typeof options.sort === 'function' ? options.sort : null;
var allowDots = typeof options.allowDots === 'undefined' ? false : options.allowDots;
var objKeys;
var filter;
if (options.encoder !== null && typeof options.encoder !== 'undefined' && typeof options.encoder !== 'function') {
throw new TypeError('Encoder has to be a function.');
}
if (typeof options.filter === 'function') {
filter = options.filter;
obj = filter('', obj);
} else if (isArray(options.filter)) {
objKeys = options.filter;
filter = options.filter;
}
var keys = [];
if (typeof obj !== 'object' || obj === null) {
return '';
}
var arrayFormat;
if (options.arrayFormat in arrayPrefixGenerators) {
arrayFormat = options.arrayFormat;
} else if ('indices' in options) {
arrayFormat = options.indices ? 'indices' : 'repeat';
} else {
arrayFormat = 'indices';
}
var generateArrayPrefix = arrayPrefixGenerators[arrayFormat];
if (!objKeys) {
objKeys = Object.keys(obj);
}
if (sort) {
objKeys.sort(sort);
}
for (var i = 0; i < objKeys.length; ++i) {
var key = objKeys[i];
if (skipNulls && obj[key] === null) {
continue;
}
keys = keys.concat(stringify(obj[key], key, generateArrayPrefix, strictNullHandling, skipNulls, encoder, filter, sort, allowDots));
}
return keys.join(delimiter);
};